Preparation and Application of Environmentally Friendly Long-life Refractories for Rotary Hearth Furnaces in Solid Waste Treatment

doi:10.19691/j.cnki.1004-4493.2026.02.006

China's Refractories ›› 2026, Vol. 35 ›› Issue (2): 28-34.DOI: 10.19691/j.cnki.1004-4493.2026.02.006

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Preparation and Application of Environmentally Friendly Long-life Refractories for Rotary Hearth Furnaces in Solid Waste Treatment

WEI Yan^*, LI Hongwei, SI Yanzhan, DING Ye, YU Shunlin, GUO Wenhui, YANG Guangyu, WANG Yachen

Sinosteel Luonai Materials Technology Corporation, Luoyang 471039, China

Online:2026-06-15 Published:2026-09-29
Contact: ^*e-mail: 1311299440@qq.com
About author:Wei Yan is a technical expert of Sinosteel Luonai Technology Corporation. She has long been engaged in research on performance improvement, formula optimization and application technology of unshaped refractory materials. Her research covers unshaped refractory material systems for mainstream smelting processes such as blast furnace metallurgy and copper pyrometallurgy. Devoted to industrial technological research and development as well as achievement transformation, she has accumulated extensive mature and practical experience in the engineering application of refractory materials.

Abstract

Abstract: To address the harsh service conditions in rotary hearth furnaces for solid waste treatment, such as high temperatures, strong corrosion, and rapid thermal cycling, as well as the issue that traditional cement-bonded refractories introduce CaO and form low-melting-point phases thus leading to spalling and failure, an Al₂O₃-SiC refractory material was prepared using high-alumina aggregates, corundum fine powder, silica fume, alumina micropowder, and silicon carbide as main raw materials, with a novel nano-composite sol as the binder. The mechanical properties, slag corrosion resistance, thermal shock resistance, and wear resistance of the material were investigated and compared with those of conventional cement-bonded materials. The results show that the nano-composite sol-bonded material completely avoids the introduction of CaO. A three-dimensional siloxane network formed through dehydration reactions significantly enhances the overall performance of the material. It achieves 302 thermal shock cycles and an abrasion loss of only 4.12 cm³. The cold modulus of rupture and cold compressive strength of the heat treated specimens are superior to those of cement-bonded materials, and their slag corrosion resistance is markedly improved. At high temperatures, phases such as Al-Fe composite spinel and leucite are generated in the material, forming a protective slag layer, which effectively blocks further molten slag corrosion, thereby extending the service life of the material.

Key words: rotary hearth furnaces, solid waste treatment, nano-composite sol-bonded Al₂O₃-SiC material, slag resistance, thermal shock resistance, wear resistance

WEI Yan, LI Hongwei, SI Yanzhan, DING Ye, YU Shunlin, GUO Wenhui, YANG Guangyu, WANG Yachen. Preparation and Application of Environmentally Friendly Long-life Refractories for Rotary Hearth Furnaces in Solid Waste Treatment[J]. China's Refractories, 2026, 35(2): 28-34.

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Preparation and Application of Environmentally Friendly Long-life Refractories for Rotary Hearth Furnaces in Solid Waste Treatment

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