{"id":19672,"date":"2026-06-22T02:56:10","date_gmt":"2026-06-22T02:56:10","guid":{"rendered":"https:\/\/www.jianjiebinder.com\/?p=19672"},"modified":"2026-06-22T03:02:32","modified_gmt":"2026-06-22T03:02:32","slug":"why-cold-bonded-iron-ore-briquettes-crack-in-gas-based-shaft-furnaces","status":"publish","type":"post","link":"https:\/\/www.jianjiebinder.com\/zh\/why-cold-bonded-iron-ore-briquettes-crack-in-gas-based-shaft-furnaces\/","title":{"rendered":"Why Cold-Bonded Iron Ore Briquettes Crack in Gas-Based Shaft Furnaces"},"content":{"rendered":"<nav class=\"wp-block-stackable-table-of-contents stk-block-table-of-contents stk-block stk-eb7b9c0 stk-block-background\" data-block-id=\"eb7b9c0\"><style>.stk-eb7b9c0 {background-color:#f8fafc !important;}.stk-eb7b9c0:before{background-color:#f8fafc !important;}<\/style><p class=\"stk-table-of-contents__title\"><strong>\u76ee\u5f55<\/strong><\/p><ul class=\"stk-table-of-contents__table\"><li><a href=\"#what-happens-to-a-cold-bonded-briquette-inside-a-shaft-furnace\">What Happens to a Cold-Bonded Briquette Inside a Shaft Furnace?<\/a><\/li><li><a href=\"#why-do-cold-bonded-iron-ore-briquettes-fail-during-dri-reduction\">Why Do Cold-Bonded Iron Ore Briquettes Fail During DRI Reduction?<\/a><\/li><li><a href=\"#why-composite-binders-perform-better-in-dri-applications\">Why Composite Binders Perform Better in DRI Applications<\/a><\/li><li><a href=\"#how-to-evaluate-a-binder-for-dri-briquettes\">How to Evaluate a Binder for DRI Briquettes<\/a><\/li><li><a href=\"#conclusion\">\u7ed3\u8bba<\/a><\/li><li><a href=\"#fa-qs-about-cold-briquetted-iron-ore-fines\">FAQs about Cold-Briquetted Iron Ore Fines<\/a><\/li><\/ul><\/nav>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">As the steel industry moves toward low-carbon ironmaking, <a href=\"https:\/\/www.jianjiebinder.com\/zh\/detailed-explanation-of-direct-reduction-ironmaking-technology-and-its-development-prospects-part-i\/\" data-type=\"post\" data-id=\"19625\">Direct Reduced Iron (DRI) production<\/a>&nbsp;and gas-based shaft furnace technology are becoming increasingly important. At the same time, cold-bonded iron ore briquettes have attracted growing interest due to their lower energy consumption, simplified process flow, and reduced investment compared with fired pellets.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\" data-block-type=\"core\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.jianjiebinder.com\/wp-content\/uploads\/2026\/06\/gas-based-shaft-furnace-1024x683.jpg\" alt=\"gas-based shaft furnace\" class=\"wp-image-19678\" style=\"width:500px\" srcset=\"https:\/\/www.jianjiebinder.com\/wp-content\/uploads\/2026\/06\/gas-based-shaft-furnace-1024x683.jpg 1024w, https:\/\/www.jianjiebinder.com\/wp-content\/uploads\/2026\/06\/gas-based-shaft-furnace-300x200.jpg 300w, https:\/\/www.jianjiebinder.com\/wp-content\/uploads\/2026\/06\/gas-based-shaft-furnace-768x512.jpg 768w, https:\/\/www.jianjiebinder.com\/wp-content\/uploads\/2026\/06\/gas-based-shaft-furnace-18x12.jpg 18w, https:\/\/www.jianjiebinder.com\/wp-content\/uploads\/2026\/06\/gas-based-shaft-furnace.jpg 1536w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">However, many DRI producers encounter a common challenge: <strong>iron ore briquettes that appear strong during storage, transportation, and handling begin to crack, break apart, or generate excessive fines after entering the shaft furnace.<\/strong><strong><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">In many cases, operators initially suspect problems with the briquetting machine or production process. <strong>In reality<\/strong>, furnace failure is often related to the thermal behavior of the briquette itself\u2014particularly the performance of the<a href=\"https:\/\/www.jianjiebinder.com\/zh\/what-is-the-best-binder-for-your-briquettes\/\" data-type=\"post\" data-id=\"15249\"> \u5efa\u6770\u7c98\u5408\u5242<\/a> under high-temperature reduction conditions.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">Understanding <strong>what happens inside a cold-bonded briquette during heating and reduction<\/strong> is the first step toward improving DRI performance.<\/p>\n\n\n\n<h2 id=\"what-happens-to-a-cold-bonded-briquette-inside-a-shaft-furnace\" class=\"wp-block-heading\" data-block-type=\"core\"><a><\/a>What Happens to a Cold-Bonded Briquette Inside a Shaft Furnace?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">Unlike fired pellets, <a href=\"https:\/\/www.jianjiebinder.com\/zh\/cold-briquetting-the-definition-production-process-and-more\/\" data-type=\"post\" data-id=\"18619\">cold agglomerated briquettes<\/a>&nbsp;do not undergo high-temperature induration during production.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\"><a href=\"https:\/\/www.jianjiebinder.com\/zh\/iron-ore-pelletizing-what-is-the-production-process-of-iron-ore-pellets\/\" data-type=\"post\" data-id=\"15857\">Fired&nbsp;(roasted)&nbsp;pellets<\/a>&nbsp;develop a sintered structure after exposure to temperatures exceeding 1200\u00b0C, giving them inherent thermal stability before they enter the reduction process.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">Cold-bonded briquettes are different. Their structural integrity depends largely on the bonding system created during briquetting. Once charged into a gas-based shaft furnace, the briquettes experience a series of physical and chemical changes:<\/p>\n\n\n\n<ul class=\"wp-block-list\" data-block-type=\"core\">\n<li data-block-type=\"core\">Moisture evaporation<\/li>\n\n\n\n<li data-block-type=\"core\">Organic material decomposition<\/li>\n\n\n\n<li data-block-type=\"core\">Thermal expansion<\/li>\n\n\n\n<li data-block-type=\"core\">Reduction reactions between iron oxides and reducing gases<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">Each of these processes generates internal stress within the briquette.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\"><strong>If the bonding structure cannot accommodate these changes, cracks begin to form. <\/strong>As the reduction process continues, those cracks may expand, causing fragmentation, fines generation, and deterioration of burden permeability inside the furnace.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">For this reason, the performance of a cold-bonded briquette cannot be evaluated solely by its room-temperature strength.<\/p>\n\n\n\n<h2 id=\"why-do-cold-bonded-iron-ore-briquettes-fail-during-dri-reduction\" class=\"wp-block-heading\" data-block-type=\"core\"><a><\/a>Why Do Cold-Bonded Iron Ore Briquettes Fail During DRI Reduction?<\/h2>\n\n\n\n<h3 id=\"1-the-binder-loses-structural-integrity-at-elevated-temperatures\" class=\"wp-block-heading\" data-block-type=\"core\"><a><\/a>1.&nbsp;The Binder Loses Structural Integrity at Elevated Temperatures<\/h3>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\" data-block-type=\"core\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" src=\"https:\/\/www.jianjiebinder.com\/wp-content\/uploads\/2026\/06\/The-Binder-Loses-Structural-Integrity-at-Elevated-Temperatures-in-furnace-768x1024.png\" alt=\"The Binder Loses Structural Integrity at Elevated Temperatures in furnace.\" class=\"wp-image-19679\" style=\"width:500px\" srcset=\"https:\/\/www.jianjiebinder.com\/wp-content\/uploads\/2026\/06\/The-Binder-Loses-Structural-Integrity-at-Elevated-Temperatures-in-furnace-768x1024.png 768w, https:\/\/www.jianjiebinder.com\/wp-content\/uploads\/2026\/06\/The-Binder-Loses-Structural-Integrity-at-Elevated-Temperatures-in-furnace-225x300.png 225w, https:\/\/www.jianjiebinder.com\/wp-content\/uploads\/2026\/06\/The-Binder-Loses-Structural-Integrity-at-Elevated-Temperatures-in-furnace-9x12.png 9w, https:\/\/www.jianjiebinder.com\/wp-content\/uploads\/2026\/06\/The-Binder-Loses-Structural-Integrity-at-Elevated-Temperatures-in-furnace.png 1086w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">One of the most common causes of briquette failure is the loss of bonding strength during heating.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">Many conventional binders can provide acceptable cold compressive strength&nbsp;(CCS) and handling performance. However, <strong>when exposed to increasing temperatures inside the shaft furnace, some binders begin to soften, decompose, or lose their bonding capability.<\/strong><strong><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">As the binder deteriorates, the internal structure of the briquette becomes unstable. Small defects develop into larger cracks, eventually causing the briquette to break apart under thermal and mechanical stress.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">This explains why some briquettes perform well during transportation yet fail shortly after entering the reduction furnace.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">For DRI applications, binder selection must consider not only cold strength but also thermal stability and hot strength retention.<\/p>\n\n\n\n<h3 id=\"2-the-briquette-cannot-effectively-release-thermal-stress\" class=\"wp-block-heading\" data-block-type=\"core\"><a><\/a>2. The Briquette Cannot Effectively Release Thermal Stress<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">During the reduction process, gases are continuously generated and transported through the briquette structure.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">At the same time, temperature gradients develop between the outer surface and the inner core of the briquette. These changes create internal stress.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">If the bonding system is too rigid or lacks a suitable pore structure, stress can become concentrated within specific areas of the briquette. <strong>Once the internal stress exceeds the material\u2019s strength limit, cracking occurs.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">The result is often excessive fines generation, which negatively affects gas flow and reduction efficiency within the shaft furnace.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">A well-designed briquette structure should not only be strong but also capable of accommodating thermal and reduction-related changes without losing its integrity.<\/p>\n\n\n\n<h2 id=\"why-composite-binders-perform-better-in-dri-applications\" class=\"wp-block-heading\" data-block-type=\"core\"><a><\/a>Why Composite Binders Perform Better in DRI Applications<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">Modern DRI briquetting projects increasingly utilize composite binder technologies because they provide a balance between cold strength, thermal stability, and reduction performance.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">A properly formulated <a href=\"https:\/\/www.jianjiebinder.com\/zh\/what-is-composite-binder-why-using-composite-binders-in-agglomeration-is-getting-popular\/\" data-type=\"post\" data-id=\"15496\">\u590d\u5408\u7c98\u7ed3\u5242<\/a>&nbsp;combines the advantages of both organic and inorganic components.<\/p>\n\n\n\n<h3 id=\"organic-components\" class=\"wp-block-heading\" data-block-type=\"core\"><a><\/a>Organic Components<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">Organic materials are primarily valued for their low residue and environmental advantages. During heating, they gradually decompose and leave behind microscopic pores within the briquette structure.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">These pores can help:<\/p>\n\n\n\n<ul class=\"wp-block-list\" data-block-type=\"core\">\n<li data-block-type=\"core\">Improve reducing gas penetration<\/li>\n\n\n\n<li data-block-type=\"core\">Enhance reduction kinetics<\/li>\n\n\n\n<li data-block-type=\"core\">Promote mass transfer during reduction<\/li>\n\n\n\n<li data-block-type=\"core\">Doesn&#8217;t contribute to unwanted residue in the final DRI product<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">Compared with many inorganic binders, organic binders generally introduce <strong>fewer impurities <\/strong>\u3001 <strong>have less impact on iron grade<\/strong>, making them attractive for high-quality DRI applications.<\/p>\n\n\n\n<h3 id=\"inorganic-components\" class=\"wp-block-heading\" data-block-type=\"core\"><a><\/a>Inorganic Components<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">Inorganic additives help <strong>maintain structural stability at elevated temperatures<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">Their primary role is to provide:<\/p>\n\n\n\n<ul class=\"wp-block-list\" data-block-type=\"core\">\n<li data-block-type=\"core\">Hot strength<\/li>\n\n\n\n<li data-block-type=\"core\">Thermal resistance<\/li>\n\n\n\n<li data-block-type=\"core\">Structural support during reduction<\/li>\n<\/ul>\n\n\n\n<h3 id=\"synergistic-performance\" class=\"wp-block-heading\" data-block-type=\"core\">Combined Performance<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">By combining organic and inorganic materials, composite binders can achieve a balance that is difficult for <a href=\"https:\/\/www.jianjiebinder.com\/zh\/single-component-binders-vs-composite-binders-which-one-fits-your-briquetting-process\/\" data-type=\"post\" data-id=\"19165\">single-component binders<\/a><strong> <\/strong>to provide.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">The objective is not simply to maximize cold strength, but to ensure that the briquette remains stable throughout transportation, furnace charging, heating, and reduction.<\/p>\n\n\n\n<h2 id=\"how-to-evaluate-a-binder-for-dri-briquettes\" class=\"wp-block-heading\" data-block-type=\"core\"><a><\/a>How to Evaluate a Binder for DRI Briquettes<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">Selecting a binder based only on cold compressive strength can lead to misleading conclusions.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">For gas-based shaft furnace applications, a more comprehensive evaluation is necessary.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">Important testing methods include:<\/p>\n\n\n\n<h3 id=\"cold-compressive-strength-ccs\" class=\"wp-block-heading\" data-block-type=\"core\"><a><\/a>Cold Compressive Strength (CCS)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">Measures the briquette\u2019s ability to withstand handling and burden load.<\/p>\n\n\n\n<h3 id=\"drop-strength-testing\" class=\"wp-block-heading\" data-block-type=\"core\"><a><\/a>Drop Strength Testing<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">Evaluates resistance to impact during transportation and charging.<\/p>\n\n\n\n<h3 id=\"hot-strength-testing\" class=\"wp-block-heading\" data-block-type=\"core\"><a><\/a>Hot Strength Testing<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">Determines whether the briquette can maintain structural integrity at elevated temperatures.<\/p>\n\n\n\n<h3 id=\"reduction-performance-testing\" class=\"wp-block-heading\" data-block-type=\"core\"><a><\/a>Reduction Performance Testing<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">Assesses briquette behavior under simulated DRI reduction conditions.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">\u5728<strong>&nbsp;<a href=\"https:\/\/www.jianjiebinder.com\/zh\/\" data-type=\"page\" data-id=\"14991\">\u5efa\u6770\u96c6\u56e2<\/a><\/strong>, binder development for iron ore briquetting projects is supported by laboratory validation and application testing. Our technical team evaluates both cold and thermal performance to help customers identify potential issues before full-scale production.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\" data-block-type=\"core\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/www.jianjiebinder.com\/wp-content\/uploads\/2025\/12\/\u4fee\u8fc7-1024x768.jpg\" alt=\"jianjie engineers with clients on-site\" class=\"wp-image-19558\" style=\"width:500px\" srcset=\"https:\/\/www.jianjiebinder.com\/wp-content\/uploads\/2025\/12\/\u4fee\u8fc7-1024x768.jpg 1024w, https:\/\/www.jianjiebinder.com\/wp-content\/uploads\/2025\/12\/\u4fee\u8fc7-300x225.jpg 300w, https:\/\/www.jianjiebinder.com\/wp-content\/uploads\/2025\/12\/\u4fee\u8fc7-768x576.jpg 768w, https:\/\/www.jianjiebinder.com\/wp-content\/uploads\/2025\/12\/\u4fee\u8fc7-1536x1152.jpg 1536w, https:\/\/www.jianjiebinder.com\/wp-content\/uploads\/2025\/12\/\u4fee\u8fc7-2048x1536.jpg 2048w, https:\/\/www.jianjiebinder.com\/wp-content\/uploads\/2025\/12\/\u4fee\u8fc7-16x12.jpg 16w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Jianjie engineers with clients<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">By combining customized binder formulations with practical testing, we help producers improve briquette stability throughout the entire DRI process.<\/p>\n\n\n\n<h2 id=\"conclusion\" class=\"wp-block-heading\" data-block-type=\"core\">\u7ed3\u8bba<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">The success of a cold-bonded iron ore briquette in a gas-based shaft furnace depends on far more than its cold strength.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">During DRI production, briquettes must withstand moisture loss, thermal expansion, binder decomposition, and reduction reactions without losing structural integrity. When the binder cannot maintain stability under these conditions, cracking and disintegration become inevitable.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">For this reason, selecting a binder specifically designed for DRI applications is critical. A well-engineered composite binder can provide the balance of cold strength, hot strength, and thermal stability needed to ensure reliable furnace performance and efficient ironmaking.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">As gas-based shaft furnace technologies continue to expand worldwide, binder performance will remain a key factor in the successful production of high-quality cold-bonded iron ore briquettes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\"><strong>Need Help with DRI Briquetting?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">If your iron ore briquettes are cracking or generating excessive fines during reduction, Jianjie&#8217;s technical team can help evaluate your material and recommend a suitable binder solution.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\"><strong><a href=\"https:\/\/www.jianjiebinder.com\/zh\/contact-jianjie\/\" data-type=\"page\" data-id=\"8833\">\u8054\u7cfb\u6211\u4eec<\/a> today for technical consultation and sample testing<\/strong>: <a href=\"mailto:info@jianjiebinder.com\">info@jianjiebinder.com<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">Stay updated with the latest <strong>coal briquetting tips, case studies, and industrial solutions<\/strong>:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">Follow us on <a href=\"https:\/\/www.linkedin.com\/company\/sichuan-jianjie-composite-materials\/\" rel=\"nofollow noopener\" target=\"_blank\"><u>LinkedIn<\/u><\/a>&nbsp;for industry insights and updates.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">Subscribe to our <a href=\"https:\/\/www.youtube.com\/@JianjieGroup\" rel=\"nofollow noopener\" target=\"_blank\"><u>YouTube channel <\/u><\/a>for demo videos, tutorials, and success stories.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\"><\/p>\n\n\n\n<h2 id=\"fa-qs-about-cold-briquetted-iron-ore-fines\" class=\"wp-block-heading\" data-block-type=\"core\">FAQs about Cold-Briquetted Iron Ore Fines<\/h2>\n\n\n\n<div data-wp-context=\"{ &quot;autoclose&quot;: false, &quot;accordionItems&quot;: [] }\" data-wp-interactive=\"core\/accordion\" role=\"group\" class=\"wp-block-accordion is-layout-flow wp-block-accordion-is-layout-flow\" data-block-type=\"core\">\n<div data-wp-class--is-open=\"state.isOpen\" data-wp-context=\"{ &quot;id&quot;: &quot;accordion-item-1&quot;, &quot;openByDefault&quot;: false }\" data-wp-init=\"callbacks.initAccordionItems\" data-wp-on-window--hashchange=\"callbacks.hashChange\" class=\"wp-block-accordion-item is-layout-flow wp-block-accordion-item-is-layout-flow\" data-block-type=\"core\">\n<h3 class=\"wp-block-accordion-heading\" data-block-type=\"core\"><button aria-expanded=\"false\" aria-controls=\"accordion-item-1-panel\" data-wp-bind--aria-expanded=\"state.isOpen\" data-wp-on--click=\"actions.toggle\" data-wp-on--keydown=\"actions.handleKeyDown\" id=\"accordion-item-1\" type=\"button\" class=\"wp-block-accordion-heading__toggle\"><span class=\"wp-block-accordion-heading__toggle-title\">1. Why do cold-bonded iron ore briquettes crack in a shaft furnace?<\/span><span class=\"wp-block-accordion-heading__toggle-icon\" aria-hidden=\"true\">+<\/span><\/button><\/h3>\n\n\n\n<div inert aria-labelledby=\"accordion-item-1\" data-wp-bind--inert=\"!state.isOpen\" id=\"accordion-item-1-panel\" role=\"region\" class=\"wp-block-accordion-panel is-layout-flow wp-block-accordion-panel-is-layout-flow\" data-block-type=\"core\">\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">Cracking usually occurs due to thermal stress during heating and reduction. As temperature rises, moisture evaporation, gas release, and binder decomposition can weaken the internal structure, leading to crack formation and disintegration.<\/p>\n<\/div>\n<\/div>\n\n\n\n<div data-wp-class--is-open=\"state.isOpen\" data-wp-context=\"{ &quot;id&quot;: &quot;accordion-item-2&quot;, &quot;openByDefault&quot;: false }\" data-wp-init=\"callbacks.initAccordionItems\" data-wp-on-window--hashchange=\"callbacks.hashChange\" class=\"wp-block-accordion-item is-layout-flow wp-block-accordion-item-is-layout-flow\" data-block-type=\"core\">\n<h3 class=\"wp-block-accordion-heading\" data-block-type=\"core\"><button aria-expanded=\"false\" aria-controls=\"accordion-item-2-panel\" data-wp-bind--aria-expanded=\"state.isOpen\" data-wp-on--click=\"actions.toggle\" data-wp-on--keydown=\"actions.handleKeyDown\" id=\"accordion-item-2\" type=\"button\" class=\"wp-block-accordion-heading__toggle\"><span class=\"wp-block-accordion-heading__toggle-title\">2. Is cold compressive strength (CCS) enough to ensure furnace performance?<\/span><span class=\"wp-block-accordion-heading__toggle-icon\" aria-hidden=\"true\">+<\/span><\/button><\/h3>\n\n\n\n<div inert aria-labelledby=\"accordion-item-2\" data-wp-bind--inert=\"!state.isOpen\" id=\"accordion-item-2-panel\" role=\"region\" class=\"wp-block-accordion-panel is-layout-flow wp-block-accordion-panel-is-layout-flow\" data-block-type=\"core\">\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">No. CCS only reflects room-temperature strength. In gas-based shaft furnace applications, hot strength and thermal stability are equally important to ensure the briquette can withstand reduction conditions.<\/p>\n<\/div>\n<\/div>\n\n\n\n<div data-wp-class--is-open=\"state.isOpen\" data-wp-context=\"{ &quot;id&quot;: &quot;accordion-item-3&quot;, &quot;openByDefault&quot;: false }\" data-wp-init=\"callbacks.initAccordionItems\" data-wp-on-window--hashchange=\"callbacks.hashChange\" class=\"wp-block-accordion-item is-layout-flow wp-block-accordion-item-is-layout-flow\" data-block-type=\"core\">\n<h3 class=\"wp-block-accordion-heading\" data-block-type=\"core\"><button aria-expanded=\"false\" aria-controls=\"accordion-item-3-panel\" data-wp-bind--aria-expanded=\"state.isOpen\" data-wp-on--click=\"actions.toggle\" data-wp-on--keydown=\"actions.handleKeyDown\" id=\"accordion-item-3\" type=\"button\" class=\"wp-block-accordion-heading__toggle\"><span class=\"wp-block-accordion-heading__toggle-title\">3. What is the role of the binder in DRI iron ore briquettes?<\/span><span class=\"wp-block-accordion-heading__toggle-icon\" aria-hidden=\"true\">+<\/span><\/button><\/h3>\n\n\n\n<div inert aria-labelledby=\"accordion-item-3\" data-wp-bind--inert=\"!state.isOpen\" id=\"accordion-item-3-panel\" role=\"region\" class=\"wp-block-accordion-panel is-layout-flow wp-block-accordion-panel-is-layout-flow\" data-block-type=\"core\">\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">The binder determines both cold handling strength and high-temperature structural stability. A suitable binder must maintain integrity during heating while allowing controlled porosity for efficient reduction.<\/p>\n<\/div>\n<\/div>\n\n\n\n<div data-wp-class--is-open=\"state.isOpen\" data-wp-context=\"{ &quot;id&quot;: &quot;accordion-item-4&quot;, &quot;openByDefault&quot;: false }\" data-wp-init=\"callbacks.initAccordionItems\" data-wp-on-window--hashchange=\"callbacks.hashChange\" class=\"wp-block-accordion-item is-layout-flow wp-block-accordion-item-is-layout-flow\" data-block-type=\"core\">\n<h3 class=\"wp-block-accordion-heading\" data-block-type=\"core\"><button aria-expanded=\"false\" aria-controls=\"accordion-item-4-panel\" data-wp-bind--aria-expanded=\"state.isOpen\" data-wp-on--click=\"actions.toggle\" data-wp-on--keydown=\"actions.handleKeyDown\" id=\"accordion-item-4\" type=\"button\" class=\"wp-block-accordion-heading__toggle\"><span class=\"wp-block-accordion-heading__toggle-title\">4. How can briquette cracking in DRI furnaces be reduced?<\/span><span class=\"wp-block-accordion-heading__toggle-icon\" aria-hidden=\"true\">+<\/span><\/button><\/h3>\n\n\n\n<div inert aria-labelledby=\"accordion-item-4\" data-wp-bind--inert=\"!state.isOpen\" id=\"accordion-item-4-panel\" role=\"region\" class=\"wp-block-accordion-panel is-layout-flow wp-block-accordion-panel-is-layout-flow\" data-block-type=\"core\">\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">Cracking can be minimized by optimizing binder formulation, improving thermal stability, and conducting proper laboratory tests such as drop strength, CCS, and hot strength evaluation before full-scale production.<\/p>\n<\/div>\n<\/div>\n\n\n\n<div data-wp-class--is-open=\"state.isOpen\" data-wp-context=\"{ &quot;id&quot;: &quot;accordion-item-5&quot;, &quot;openByDefault&quot;: false }\" data-wp-init=\"callbacks.initAccordionItems\" data-wp-on-window--hashchange=\"callbacks.hashChange\" class=\"wp-block-accordion-item is-layout-flow wp-block-accordion-item-is-layout-flow\" data-block-type=\"core\">\n<h3 class=\"wp-block-accordion-heading\" data-block-type=\"core\"><button aria-expanded=\"false\" aria-controls=\"accordion-item-5-panel\" data-wp-bind--aria-expanded=\"state.isOpen\" data-wp-on--click=\"actions.toggle\" data-wp-on--keydown=\"actions.handleKeyDown\" id=\"accordion-item-5\" type=\"button\" class=\"wp-block-accordion-heading__toggle\"><span class=\"wp-block-accordion-heading__toggle-title\">5. Are composite binders better than single-component binders?<\/span><span class=\"wp-block-accordion-heading__toggle-icon\" aria-hidden=\"true\">+<\/span><\/button><\/h3>\n\n\n\n<div inert aria-labelledby=\"accordion-item-5\" data-wp-bind--inert=\"!state.isOpen\" id=\"accordion-item-5-panel\" role=\"region\" class=\"wp-block-accordion-panel is-layout-flow wp-block-accordion-panel-is-layout-flow\" data-block-type=\"core\">\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">Yes. Composite binders generally provide a better balance of cold strength, hot strength, and reduction performance, making them more suitable for gas-based shaft furnace applications.<\/p>\n<\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Learn why cold-bonded iron ore briquettes crack during DRI reduction and how the right binder improves hot strength, thermal stability, and furnace performance.<\/p>","protected":false},"author":1,"featured_media":19734,"comment_status":"open","ping_status":"open","sticky":false,"template":"wp-custom-template-single-posts-with-sidebar","format":"standard","meta":{"footnotes":""},"categories":[40,39,34,57],"tags":[],"class_list":["post-19672","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","category-blog","category-briquetting","category-metal-mineral-briquetting"],"jetpack_featured_media_url":"https:\/\/www.jianjiebinder.com\/wp-content\/uploads\/2026\/06\/Cold-Bonded-Iron-Ore-Briquettes-Crack-in-Furnace.png","_links":{"self":[{"href":"https:\/\/www.jianjiebinder.com\/zh\/wp-json\/wp\/v2\/posts\/19672","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.jianjiebinder.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.jianjiebinder.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.jianjiebinder.com\/zh\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.jianjiebinder.com\/zh\/wp-json\/wp\/v2\/comments?post=19672"}],"version-history":[{"count":11,"href":"https:\/\/www.jianjiebinder.com\/zh\/wp-json\/wp\/v2\/posts\/19672\/revisions"}],"predecessor-version":[{"id":19738,"href":"https:\/\/www.jianjiebinder.com\/zh\/wp-json\/wp\/v2\/posts\/19672\/revisions\/19738"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.jianjiebinder.com\/zh\/wp-json\/wp\/v2\/media\/19734"}],"wp:attachment":[{"href":"https:\/\/www.jianjiebinder.com\/zh\/wp-json\/wp\/v2\/media?parent=19672"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.jianjiebinder.com\/zh\/wp-json\/wp\/v2\/categories?post=19672"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.jianjiebinder.com\/zh\/wp-json\/wp\/v2\/tags?post=19672"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}