This research work aims to fabricate industrial refractory bricks using cheap and abundant kaolin DD₃ constituted of Halloysite. The fabrication process consists on mixing the crushed raw materials (Kaolin/Clay, Fireclay, Talc) with the respective proportions and an optimized granulometry, shaped by a uniaxial hydrostatic pressure of 250 bars, followed by drying at 100°C and sintering at 1300°C. The addition of Talc ‐ at first with water, Fireclay and AP/DD₃‐ as a source of MgO promotes the increase of Cordierite formation in order to obtain high heat resistance shock and reduced thermal expansion. Three assays are studied with AP Clay and DD₃ Kaolin weight ratios (100/0, 50/50 and 0/100) % corresponding to (ER₀, ER₁ and ER₂) respectively. Mineralogical analysis results of the new refractory bricks, indicate the presence of Mullite and Cordierite as major phases besides Corundum and Quartz as minor phases. All products (ER₀, ER₁ and ER₂) are found to be argillaceous refractory with Alumina concentration (40 < Al₂O₃ < 45%, FC 40 group) and a melting point higher than 1600°C. The mechanical resistance of the samples is of the same order of magnitude; reaching 51 MPa.

中文翻译：

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由埃洛石和滑石制成的新型莫来石-堇青石陶瓷耐火材料

这项研究工作旨在使用廉价和丰富的由Halloysite构成的高岭土DD ₃来制造工业耐火砖。制造过程包括将压碎的原料（高岭土/粘土，Fireclay，滑石粉）以各自的比例混合，并通过250 bar的单轴静水压成型最佳粒度，然后在100°C干燥并在1300°C烧结C。首先用水，Fireclay和AP / DD _3-作为MgO的源添加滑石粉可促进堇青石形成的增加，从而获得高耐热冲击性并降低热膨胀。使用AP Clay和DD ₃高岭土重量比（100 / 0、50 / 50和0/100）对应（ER ₀，ER₁和ER ₂）。新型耐火砖的矿物学分析结果表明，除了刚玉和石英为次要相之外，莫来石和堇青石也为主要相。发现所有产品（ER ₀，ER ₁和ER ₂）均为具有氧化铝浓度（40 <Al ₂ O ₃ <45％，FC 40组）且熔点高于1600°C的泥质耐火材料。样品的机械阻力是相同的数量级。达到51 MPa。