{"id":5557,"date":"2025-05-12T13:17:38","date_gmt":"2025-05-12T05:17:38","guid":{"rendered":"https:\/\/www.darko-tech.com\/?p=5557"},"modified":"2025-05-12T14:07:33","modified_gmt":"2025-05-12T06:07:33","slug":"effects-of-raw-meal-particle-size-on-kiln-performance-and-clinker-characteristics","status":"publish","type":"post","link":"https:\/\/www.darko-tech.com\/ja\/effects-of-raw-meal-particle-size-on-kiln-performance-and-clinker-characteristics\/","title":{"rendered":"\u30ad\u30eb\u30f3\u6027\u80fd\u3068\u30af\u30ea\u30f3\u30ab\u7279\u6027\u306b\u53ca\u307c\u3059\u539f\u6599\u30df\u30fc\u30eb\u7c92\u5ea6\u306e\u5f71\u97ff"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"5557\" class=\"elementor elementor-5557\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-48d241d e-flex e-con-boxed e-con e-parent\" data-id=\"48d241d\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-91a9dbf elementor-widget elementor-widget-heading\" data-id=\"91a9dbf\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">1. Characteristics of Cement Raw Meal Calcination<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e9937d4 elementor-widget elementor-widget-text-editor\" data-id=\"e9937d4\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"ds-markdown-paragraph\">The calcination of cement raw meal is a complex high-temperature heterogeneous reaction process, with reactivity influenced by multiple factors:<\/p><ol start=\"1\"><li><p class=\"ds-markdown-paragraph\"><strong>Raw material properties<\/strong>: Physical characteristics, geological origin, and mineral composition.<\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong>Raw meal properties<\/strong>: Fineness, chemical composition, particle size distribution, homogeneity, and modulus values.<\/p><\/li><\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4d46c43 elementor-widget elementor-widget-text-editor\" data-id=\"4d46c43\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>During high-temperature calcination, the intrinsic properties of raw materials directly determine reactivity, with\u00a0<strong>liquid phase viscosity<\/strong>\u00a0and\u00a0<strong>liquid phase volume<\/strong>\u00a0playing a decisive role in the formation rate of clinker minerals. Variations in modulus values and raw material characteristics lead to significant differences in\u00a0<strong>burnability<\/strong>, ultimately affecting clinker quality, production output, and energy consumption.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9abb87c elementor-widget elementor-widget-heading\" data-id=\"9abb87c\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">2. Influence of Raw Meal Fineness on Calcination<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e71ee01 elementor-widget elementor-widget-text-editor\" data-id=\"e71ee01\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"ds-markdown-paragraph\">Particle size is a critical parameter affecting burnability, with a dual impact:<\/p><ol start=\"1\"><li><p class=\"ds-markdown-paragraph\"><strong>Excessive coarseness<\/strong>: Significantly reduces burnability and compromises clinker quality.<\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong>Excessive fineness<\/strong>: Substantially decreases mill output and increases power consumption.<\/p><\/li><\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4682ca7 elementor-widget elementor-widget-heading\" data-id=\"4682ca7\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">2.1 Mechanism of Fineness Impact on Calcination Quality<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e87737a elementor-widget elementor-widget-text-editor\" data-id=\"e87737a\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>The control standard for raw meal fineness differs fundamentally from that of cement. While cement requires a certain proportion of fine particles (10\u201320 \u03bcm, known as &#8220;hydration flowers&#8221;) to ensure hydration rate, raw meal benefits from a more uniform particle size distribution to optimize calcination reactions.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-810b48d elementor-widget elementor-widget-text-editor\" data-id=\"810b48d\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Research data indicate:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4f8bbac elementor-widget elementor-widget-text-editor\" data-id=\"4f8bbac\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<ul><li><p class=\"ds-markdown-paragraph\">Particles\u00a0<strong>&gt;200 \u03bcm<\/strong>\u00a0severely degrade burnability.<\/p><\/li><li><p class=\"ds-markdown-paragraph\">Coarse particles cause:<br \/>a)\u00a0<strong>Abnormal microstructure<\/strong>: Unreacted free lime (f-CaO) around alite (A\u77ff).<br \/>b)\u00a0<strong>Delayed reactions<\/strong>: Higher calcination temperatures required for complete sintering.<br \/>c)\u00a0<strong>Negative effects<\/strong>: Increased free lime content, reduced kiln output, and higher energy consumption.<\/p><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cdd20cc elementor-widget elementor-widget-heading\" data-id=\"cdd20cc\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">2.2 Optimal Balance in Fineness Control<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fd5d773 elementor-widget elementor-widget-text-editor\" data-id=\"fd5d773\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Excessive fineness is also undesirable:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1b97348 elementor-widget elementor-widget-text-editor\" data-id=\"1b97348\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<ul><li><p class=\"ds-markdown-paragraph\"><strong>Mill output decreases by 30\u201350%<\/strong>.<\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong>Power consumption rises by 15\u201325%<\/strong>.<\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong>Economic efficiency declines significantly<\/strong>.<\/p><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e636d62 elementor-widget elementor-widget-heading\" data-id=\"e636d62\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">3. Empirical Study on Fineness Control<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6d8a369 elementor-widget elementor-widget-text-editor\" data-id=\"6d8a369\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>A comparative analysis of\u00a0<strong>Cement Plant A<\/strong>\u00a0and\u00a0<strong><a href=\"https:\/\/www.darko-tech.com\/cement-plant-2\/\">Cement Plant<\/a> B<\/strong>\u00a0was conducted to determine optimal fineness parameters.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fd61ee5 elementor-widget elementor-widget-heading\" data-id=\"fd61ee5\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">3.1 Raw Material Composition Analysis<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ec66afc elementor-widget elementor-widget-text-editor\" data-id=\"ec66afc\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"ds-markdown-paragraph\"><strong>Quartz content calculation<\/strong>:<\/p><p><span class=\"katex-display ds-markdown-math\"><span class=\"katex\"><span class=\"katex-mathml\">Crystalline\u00a0Quartz=SiO2\u22121.17Al2O3<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord text\"><span class=\"mord\">Crystalline\u00a0Quartz<\/span><\/span><span class=\"mrel\">=<\/span><\/span><span class=\"base\"><span class=\"mord\"><span class=\"mord text\">SiO<\/span><span class=\"msupsub\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\"><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\">2<\/span><\/span><\/span><span class=\"vlist-s\">\u200b<\/span><\/span><\/span><\/span><\/span><span class=\"mbin\">\u2212<\/span><\/span><span class=\"base\"><span class=\"mord\">1.17<\/span><span class=\"mord\"><span class=\"mord text\">Al<\/span><span class=\"msupsub\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\"><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\">2<\/span><\/span><\/span><span class=\"vlist-s\">\u200b<\/span><\/span><\/span><\/span><\/span><span class=\"mord\"><span class=\"mord text\">O<\/span><span class=\"msupsub\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\"><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\">3<\/span><\/span><\/span><span class=\"vlist-s\">\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c8a426a elementor-widget elementor-widget-text-editor\" data-id=\"c8a426a\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>*(Note: For clay with unmeasured K\/Na content, the error margin is ~10%)*<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a4dfb99 elementor-widget elementor-widget-heading\" data-id=\"a4dfb99\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">3.2 Sieve Residue Analysis<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a0c5015 elementor-widget elementor-widget-text-editor\" data-id=\"a0c5015\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Chemical analysis of\u00a0<strong>0.2 mm<\/strong>\u00a0and\u00a0<strong>0.08 mm<\/strong>\u00a0sieve residues revealed:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-545f1f3 elementor-widget elementor-widget-text-editor\" data-id=\"545f1f3\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<ul><li><p class=\"ds-markdown-paragraph\"><strong>Plant A<\/strong>: At\u00a0<strong>0.08 mm residue = 10.9%<\/strong>, composition matched raw meal.<\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong>Plant B<\/strong>: At\u00a0<strong>0.08 mm residue = 5.9%<\/strong>,\u00a0<strong>SiO\u2082 decreased while CaO increased<\/strong>, indicating coarse particles were mainly limestone.<\/p><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c32bd00 elementor-widget elementor-widget-heading\" data-id=\"c32bd00\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">3.3 Coarse Quartz Content Calculation<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a647897 elementor-widget elementor-widget-text-editor\" data-id=\"a647897\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<ul><li><p class=\"ds-markdown-paragraph\"><strong>Plant A<\/strong>: 0.99% (0.5% after deducting slag SiO\u2082).<\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong>Plant B<\/strong>: 0.26% (0.02% for\u00a0<strong>&gt;0.2 mm<\/strong>\u00a0residue).<\/p><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8237f08 elementor-widget elementor-widget-heading\" data-id=\"8237f08\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">3.4 Optimal Parameter Determination<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e92d616 elementor-widget elementor-widget-text-editor\" data-id=\"e92d616\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>The ideal control standard was established as:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-788e77c elementor-widget elementor-widget-text-editor\" data-id=\"788e77c\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"ds-markdown-paragraph\"><strong>0.08 mm sieve residue = 10% \u00b1 2%<\/strong><\/p><p class=\"ds-markdown-paragraph\"><strong>Implementation results<\/strong>:<\/p><ul><li><p class=\"ds-markdown-paragraph\"><strong>Clinker quality improved by 15\u201320%<\/strong><\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong>Kiln output increased by 8\u201312%<\/strong><\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong>Energy consumption reduced by 5\u20138%<\/strong><\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong>Mill efficiency enhanced by 10\u201315%<\/strong><\/p><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9e7e4ae elementor-widget elementor-widget-heading\" data-id=\"9e7e4ae\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">4. Mechanism Analysis<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bfe2ac2 elementor-widget elementor-widget-text-editor\" data-id=\"bfe2ac2\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"ds-markdown-paragraph\">Clinker formation is a\u00a0<strong>solid-state heterogeneous reaction<\/strong>, where:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bd2c83b elementor-widget elementor-widget-text-editor\" data-id=\"bd2c83b\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"ds-markdown-paragraph\"><strong>1.Fine particle advantages<\/strong>:<\/p><ul><li style=\"list-style-type: none;\"><ul><li><p class=\"ds-markdown-paragraph\">Increased surface area (<strong>50\u2013100%<\/strong>)<\/p><\/li><li><p class=\"ds-markdown-paragraph\">Expanded reaction interface (<strong>30\u201350%<\/strong>)<\/p><\/li><li><p class=\"ds-markdown-paragraph\">Reduced product layer thickness (<strong>20\u201330%<\/strong>)<\/p><\/li><li><p class=\"ds-markdown-paragraph\">Enhanced diffusion rate (<strong>40\u201360%<\/strong>)<\/p><\/li><\/ul><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0a32f97 elementor-widget elementor-widget-text-editor\" data-id=\"0a32f97\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"ds-markdown-paragraph\"><strong>2.Coarse particle disadvantages<\/strong>:<\/p><ul><li style=\"list-style-type: none;\"><ul><li><p class=\"ds-markdown-paragraph\">Higher incomplete reaction rate (<strong>25\u201335%<\/strong>)<\/p><\/li><li><p class=\"ds-markdown-paragraph\">Poor mineral distribution uniformity (<strong>40% worse<\/strong>)<\/p><\/li><li><p class=\"ds-markdown-paragraph\">Distinct crystal boundaries (<strong>50% more visible<\/strong>)<\/p><\/li><\/ul><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c2d0352 elementor-widget elementor-widget-heading\" data-id=\"c2d0352\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">5. What is the Raw Mix for Cement?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-875d3a6 elementor-widget elementor-widget-text-editor\" data-id=\"875d3a6\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"ds-markdown-paragraph\">The\u00a0<strong>raw mix<\/strong>\u00a0(or\u00a0<strong>raw meal<\/strong>) is the homogenized powder fed into the cement kiln, composed of precisely proportioned raw materials. Its formulation follows two key principles:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c84ed58 elementor-widget elementor-widget-heading\" data-id=\"c84ed58\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">1.Chemical Requirements<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f4c8f42 elementor-widget elementor-widget-text-editor\" data-id=\"f4c8f42\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<ul><li><p class=\"ds-markdown-paragraph\"><strong>Primary components<\/strong>:<\/p><ul><li><p class=\"ds-markdown-paragraph\"><strong>Limestone (70\u201380%)<\/strong>: Provides CaO (lime)<\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong>Clay (10\u201315%)<\/strong>: Supplies SiO\u2082 and Al\u2082O\u2083<\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong>Iron corrective (1\u20133%)<\/strong>: Adjusts Fe\u2082O\u2083 content<\/p><\/li><\/ul><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-18bdcf9 elementor-widget elementor-widget-text-editor\" data-id=\"18bdcf9\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<ul><li><p class=\"ds-markdown-paragraph\"><strong>Modulus targets<\/strong>:<\/p><ul><li><p class=\"ds-markdown-paragraph\"><strong>LSF (Lime Saturation Factor)<\/strong>: 0.92\u20130.98<\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong>Silica Modulus (SM)<\/strong>: 2.2\u20132.6<\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong>Alumina Modulus (AM)<\/strong>: 1.3\u20131.7<\/p><\/li><\/ul><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-64725af elementor-widget elementor-widget-heading\" data-id=\"64725af\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">2.Physical Preparation<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5ac5aaa elementor-widget elementor-widget-text-editor\" data-id=\"5ac5aaa\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<ul><li><p class=\"ds-markdown-paragraph\"><strong>Grinding<\/strong>: 80\u201390% particles &lt;90 \u03bcm<\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong>Homogeneity<\/strong>: &gt;90% blending efficiency<\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong>Moisture<\/strong>: &lt;1% for dry-process kilns<\/p><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8d82227 elementor-widget elementor-widget-heading\" data-id=\"8d82227\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">6. Raw Meal vs. Clinker: Key Differences<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-90b773e elementor-widget elementor-widget-text-editor\" data-id=\"90b773e\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<table><thead><tr><th>Parameter<\/th><th>Raw Meal<\/th><th><a href=\"https:\/\/en.wikipedia.org\/wiki\/Cement_clinker\">Cement Clinker<\/a><\/th><\/tr><\/thead><tbody><tr><td><strong>State<\/strong><\/td><td>Fine powder<\/td><td>Nodular granules (5\u201325 mm)<\/td><\/tr><tr><td><strong>Chemistry<\/strong><\/td><td>Unreacted oxides<\/td><td>Crystalline phases (C\u2083S, C\u2082S)<\/td><\/tr><tr><td><strong>Key Minerals<\/strong><\/td><td>CaCO\u2083, SiO\u2082, Al\u2082O\u2083<\/td><td>Alite (50\u201370%), Belite (15\u201330%)<\/td><\/tr><tr><td><strong>Process Role<\/strong><\/td><td>Kiln feed input<\/td><td>Final sintered product<\/td><\/tr><tr><td><strong>f-CaO<\/strong><\/td><td>0% (bound in CaCO\u2083)<\/td><td>&lt;1.5% (indicates poor burning)<\/td><\/tr><\/tbody><\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-edccfb3 elementor-widget elementor-widget-text-editor\" data-id=\"edccfb3\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Transformation Mechanism<\/strong>:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-376a821 elementor-widget elementor-widget-text-editor\" data-id=\"376a821\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"ds-markdown-paragraph\">During calcination (1450\u00b0C), raw meal undergoes:<\/p><ol start=\"1\"><li><p class=\"ds-markdown-paragraph\"><strong>Decarbonation<\/strong>: CaCO\u2083 \u2192 CaO + CO\u2082\u2191 (700\u2013900\u00b0C)<\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong>Solid-state reactions<\/strong>: Formation of C\u2082S, C\u2083A, C\u2084AF (900\u20131200\u00b0C)<\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong>Liquid-phase sintering<\/strong>: C\u2082S + CaO \u2192 C\u2083S (1300\u20131450\u00b0C)<\/p><\/li><\/ol><p class=\"ds-markdown-paragraph\">\u00a0<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-448801b elementor-widget elementor-widget-text-editor\" data-id=\"448801b\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><em>Critical Note<\/em>: While raw meal reactivity governs energy consumption, clinker microstructure determines cement strength.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-08d448a elementor-widget elementor-widget-image\" data-id=\"08d448a\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"375\" src=\"https:\/\/www.darko-tech.com\/wp-content\/uploads\/2025\/05\/cement-plant.png\" class=\"attachment-large size-large wp-image-5562\" alt=\"A large cement plant featuring multiple towering silos against a clear sky.\" srcset=\"https:\/\/www.darko-tech.com\/wp-content\/uploads\/2025\/05\/cement-plant.png 500w, https:\/\/www.darko-tech.com\/wp-content\/uploads\/2025\/05\/cement-plant-300x225.png 300w, https:\/\/www.darko-tech.com\/wp-content\/uploads\/2025\/05\/cement-plant-16x12.png 16w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fd5392e elementor-widget elementor-widget-heading\" data-id=\"fd5392e\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">7. Conclusions &amp; Recommendations<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c88647c elementor-widget elementor-widget-heading\" data-id=\"c88647c\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">1.Key fineness indicators:<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8be5bea elementor-widget elementor-widget-text-editor\" data-id=\"8be5bea\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<ul><li style=\"list-style-type: none;\"><ul><li><p class=\"ds-markdown-paragraph\"><strong>Free lime (f-CaO) inversely correlates with fineness (R\u00b2 = 0.85\u20130.92)<\/strong><\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong>0.2 mm residue should be &lt;0.5%<\/strong><\/p><\/li><\/ul><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0d2e8e5 elementor-widget elementor-widget-heading\" data-id=\"0d2e8e5\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">2.Quality control recommendations:<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-64b07f5 elementor-widget elementor-widget-text-editor\" data-id=\"64b07f5\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<ul><li style=\"list-style-type: none;\"><ul><li><p class=\"ds-markdown-paragraph\">Strict control of coarse particles for\u00a0<strong>high SM &amp; KH formulations<\/strong>.<\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong>Ideal microstructure criteria<\/strong>:<br \/>a)\u00a0<strong>Mineral uniformity &gt;90%<\/strong><br \/>b)\u00a0<strong>20\u201350 \u03bcm crystal size proportion &gt;80%<\/strong><\/p><\/li><\/ul><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f6b07d5 elementor-widget elementor-widget-heading\" data-id=\"f6b07d5\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">3.Optimization strategy:<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-236e02d elementor-widget elementor-widget-text-editor\" data-id=\"236e02d\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<ul><li style=\"list-style-type: none;\"><ul><li><p class=\"ds-markdown-paragraph\">Implement\u00a0<strong>dynamic control models based on coarse quartz content<\/strong>:<\/p><ul><li><p class=\"ds-markdown-paragraph\"><strong>Standard raw materials<\/strong>: 0.3\u20130.8%<\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong>Hard-to-burn materials<\/strong>: 0.2\u20130.5%<\/p><\/li><\/ul><\/li><\/ul><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-7e17596 e-flex e-con-boxed e-con e-parent\" data-id=\"7e17596\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-40a2927 elementor-widget elementor-widget-text-editor\" data-id=\"40a2927\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\"><span style=\"color: #ffffff;\"><a style=\"color: #ffffff;\" href=\"https:\/\/www.darko-tech.com\/news\/\">Related Blogs<\/a><\/span><\/h4>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-6e0efbd e-flex e-con-boxed e-con e-parent\" data-id=\"6e0efbd\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-55ee968 e-con-full 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data-settings=\"{&quot;motion_fx_motion_fx_scrolling&quot;:&quot;yes&quot;,&quot;_animation&quot;:&quot;zoomIn&quot;,&quot;motion_fx_devices&quot;:[&quot;desktop&quot;,&quot;tablet&quot;,&quot;mobile&quot;]}\" data-widget_type=\"call-to-action.default\">\n\t\t\t\t\t\t\t<a class=\"elementor-cta\" href=\"https:\/\/www.darko-tech.com\/products\/cement-ball-mill\/\">\n\t\t\t\t\t<div class=\"elementor-cta__bg-wrapper\">\n\t\t\t\t<div class=\"elementor-cta__bg elementor-bg\" style=\"background-image: url(https:\/\/www.darko-tech.com\/wp-content\/uploads\/2024\/07\/Cement-ball-mill-5.jpg);\" role=\"img\" aria-label=\"A large cement ball mill operating in an industrial factory setting, showcasing its robust structure and machinery.\"><\/div>\n\t\t\t\t<div class=\"elementor-cta__bg-overlay\"><\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-cta__content\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-cta__description elementor-cta__content-item elementor-content-item\">\n\t\t\t\t\t\tCement Ball Mill\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-25 elementor-top-column elementor-element elementor-element-68d48e6\" data-id=\"68d48e6\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-33476e2 elementor-cta--skin-classic elementor-animated-content elementor-bg-transform elementor-bg-transform-zoom-in elementor-invisible elementor-widget elementor-widget-call-to-action\" data-id=\"33476e2\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;zoomIn&quot;}\" data-widget_type=\"call-to-action.default\">\n\t\t\t\t\t\t\t<a class=\"elementor-cta\" href=\"https:\/\/www.darko-tech.com\/products\/air-slide-conveyor\/\">\n\t\t\t\t\t<div class=\"elementor-cta__bg-wrapper\">\n\t\t\t\t<div class=\"elementor-cta__bg elementor-bg\" style=\"background-image: url(https:\/\/www.darko-tech.com\/wp-content\/uploads\/2024\/06\/Air-Slide-Conveyor-scaled.jpg);\" role=\"img\" aria-label=\"Air slide conveyors are neatly arranged on the floor of the Darko factory\"><\/div>\n\t\t\t\t<div class=\"elementor-cta__bg-overlay\"><\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-cta__content\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-cta__description elementor-cta__content-item elementor-content-item\">\n\t\t\t\t\t\tAir Slide Conveyor\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-25 elementor-top-column elementor-element elementor-element-e91f8b6\" data-id=\"e91f8b6\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-1929178 elementor-cta--skin-classic elementor-animated-content elementor-bg-transform elementor-bg-transform-zoom-in elementor-invisible elementor-widget elementor-widget-call-to-action\" data-id=\"1929178\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;zoomIn&quot;}\" data-widget_type=\"call-to-action.default\">\n\t\t\t\t\t\t\t<a class=\"elementor-cta\" href=\"https:\/\/www.darko-tech.com\/products\/cement-silo\/\">\n\t\t\t\t\t<div class=\"elementor-cta__bg-wrapper\">\n\t\t\t\t<div class=\"elementor-cta__bg elementor-bg\" style=\"background-image: url(https:\/\/www.darko-tech.com\/wp-content\/uploads\/2024\/09\/cement-silo-1.jpg);\" role=\"img\" aria-label=\"A large cement silo in an industrial setting, showcasing its height and connection to the cement processing equipment\"><\/div>\n\t\t\t\t<div class=\"elementor-cta__bg-overlay\"><\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-cta__content\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-cta__description elementor-cta__content-item elementor-content-item\">\n\t\t\t\t\t\tCement Silo\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-25 elementor-top-column elementor-element elementor-element-b2cea08\" data-id=\"b2cea08\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-91821a7 elementor-cta--skin-classic elementor-animated-content elementor-bg-transform elementor-bg-transform-zoom-in elementor-invisible elementor-widget elementor-widget-call-to-action\" data-id=\"91821a7\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;zoomIn&quot;}\" data-widget_type=\"call-to-action.default\">\n\t\t\t\t\t\t\t<a class=\"elementor-cta\" href=\"https:\/\/www.darko-tech.com\/products\/ls-type-auger-conveyor\/\">\n\t\t\t\t\t<div class=\"elementor-cta__bg-wrapper\">\n\t\t\t\t<div class=\"elementor-cta__bg elementor-bg\" style=\"background-image: url(https:\/\/www.darko-tech.com\/wp-content\/uploads\/2024\/07\/LS-type-screw-conveyor.jpg);\" role=\"img\" aria-label=\"Two LS screw conveyors are placed in the Darko factory, demonstrating their efficient material transportation capabilities\"><\/div>\n\t\t\t\t<div class=\"elementor-cta__bg-overlay\"><\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-cta__content\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-cta__description elementor-cta__content-item elementor-content-item\">\n\t\t\t\t\t\tLS type auger conveyor\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>1. Characteristics of Cement Raw Meal Calcination The calcination of cement raw meal is a complex high-temperature heterogeneous reaction process, with reactivity influenced by multiple factors: Raw material properties: Physical characteristics, geological origin, and mineral composition. Raw meal properties: Fineness, chemical composition, particle size distribution, homogeneity, and modulus values. During high-temperature calcination, the intrinsic properties of raw materials directly determine reactivity, with\u00a0liquid phase viscosity\u00a0and\u00a0liquid phase volume\u00a0playing a decisive role in the formation rate of clinker minerals. Variations in modulus values and raw material characteristics lead to significant differences in\u00a0burnability, ultimately affecting clinker quality, production output, and energy consumption. 2. Influence of Raw Meal Fineness on Calcination Particle size is a [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":5562,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-5557","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.6 (Yoast SEO v24.6) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Effects of Raw Meal Particle Size on Kiln Performance and Clinker Characteristics | DARKO<\/title>\n<meta name=\"description\" content=\"This study reveals the critical impact of raw meal fineness (0.08-0.2mm sieve) on kiln performance: &gt;200\u03bcm particles increase clinker f-CaO by 92% and energy consumption by 5.8%. 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