A Novel Method of Extracting Iron from High-Iron Red Mud and Preparing Low-Carbon Cement Clinker from Tailings

IF 2.3 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

JOM Pub Date : 2022-04-06 DOI:10.1007/s11837-022-05264-6

Kun Wang, Yan Liu, Zhihe Dou, Guozhi Lu, Xiaofei Li, Ting-An Zhang

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引用次数: 5

Abstract

A novel method of extracting iron from high-iron red mud and preparing low-carbon cement clinker from tailings was proposed. Thermodynamics of smelting reduction were calculated. The effects of different conditions on iron recovery were investigated systematically. Properties of cement samples prepared from water quenched slag were analyzed. Results showed that increasing temperature, Na₂O content and C/S and decreasing A/S appropriately were beneficial to increase the liquid content in slag. Iron recovery was 97.6% under optimal conditions, and the obtained metal met the industrial standard of pig iron for steelmaking. Vitreous content in water quenched slag was 99%, and its pozzolanic activity was comparable to that of S95 grade ore powder. Due to energy consumption and CO₂ emission from decomposition of limestone in calcination process of cement clinker reducing significantly, the CO₂ emission was reduced to about 400 kg per ton of cement clinker based on the 50% doping amount.

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从高铁赤泥中提铁及尾矿制备低碳水泥熟料的新方法

提出了一种从高铁赤泥中提铁和从尾矿中制备低碳水泥熟料的新方法。计算了熔炼还原热力学。系统地考察了不同条件对铁回收率的影响。对水淬渣制备的水泥样品进行了性能分析。结果表明，适当提高炉温、Na2O含量和C/S，降低A/S有利于提高炉渣液含量。在最佳工艺条件下，铁回收率为97.6%，所得金属达到炼钢用生铁的工业标准。水淬渣中玻璃体含量为99%，其火山灰活性与S95级矿粉相当。由于水泥熟料煅烧过程中石灰石的能耗和分解产生的CO2排放量显著降低，在掺量为50%的情况下，每吨水泥熟料的CO2排放量降至400 kg左右。

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来源期刊

JOM 工程技术-材料科学：综合

CiteScore

4.50

自引率

3.80%

发文量

540

审稿时长

2.8 months

期刊介绍： JOM is a technical journal devoted to exploring the many aspects of materials science and engineering. JOM reports scholarly work that explores the state-of-the-art processing, fabrication, design, and application of metals, ceramics, plastics, composites, and other materials. In pursuing this goal, JOM strives to balance the interests of the laboratory and the marketplace by reporting academic, industrial, and government-sponsored work from around the world.