Synergetic valorization of basic oxygen furnace slag and stone coal: Metal recovery and preparation of glass-ceramics
Synergetic valorization of basic oxygen furnace slag and stone coal: Metal recovery and preparation of glass-ceramics
复制标题
转炉渣与石煤协同增值：金属回收与微晶玻璃制备
DOI：
10.1016/j.wasman.2021.08.044
复制
发表时间：
2021
期刊：
影响因子：
8.1
通讯作者：
Fabritius Timo
中科院分区：
文献类型：
--
作者：
Lin Yong;Yan Baijun;Shu Qifeng;Fabritius Timo
提出了一种利用转炉渣和石煤制备铁合金和微晶玻璃的协同增效方法。研究了还原时间、温度、转炉渣与石煤质量比对还原效果的影响。通过原位观察和溶解实验研究了还原机理。进一步研究了烧结温度对以该渣为原料制备微晶玻璃性能的影响。原位观测结果表明，还原反应主要发生在1673-1793 K之间。增加还原时间、温度、减少石煤添加量可以提高氧化物的还原率和金属液滴的尺寸。回收的铁合金由Fe、Mn、P和V组成，其具有返回炼钢过程或提取钒的潜力。改性后的终渣是制备微晶玻璃的合适原料。制备了抗弯强度达95.83 MPa的硅灰石基微晶玻璃，可作为耐磨材料和建筑装饰材料。因此，本工艺路线可以将两种工业固体废物转化为两种更清洁的产品，实现“零废物”的目标。
A synergetic valorization method was proposed to convert the basic oxygen furnace (BOF) slag and stone coal into ferroalloy and glass-ceramic in this work. Effects of reduction time, temperature, and the mass ratio of BOF slag to stone coal on the reduction were studied. The reduction mechanism was investigated by in-situ observation and dissolution experiments. The effect of sintering temperature on the properties of glass-ceramics prepared from the final slag was further studied. The in-situ observation results indicate that the reduction reactions occurred mainly in the temperature range of 1673–1793 K. The reduction ratio of oxides and size of metal droplets can be improved by increasing reduction time, temperature, and decreasing stone coal addition. The recovered ferroalloys consisted of Fe, Mn, P, and V, which has the potential of returning to the steelmaking process or extracting vanadium. The modified final slag was suitable material for preparing glass-ceramic. Wollastonite-based glass-ceramic with a maximum bending strength of 95.83 MPa was prepared, which could be applied as abrasion-resistant and building decoration materials. Therefore, the present technological route can convert two kinds of industrial solid waste into two kinds of cleaner products and achieve the target of “zero waste”.