提钒尾渣与赤泥共处置过程中铬硫元素的分配行为
Distribution behavior of chromium and sulfur elements during co-treatment of vanadium extraction tailings and red mud
王春会 1郁健 2冯晓明 3张延玲 1张帅1
作者信息
- 1. 北京科技大学,绿色低碳钢铁冶金全国重点实验室,北京 100083
- 2. 北京北科环境工程有限公司,北京 100083
- 3. 建龙钢铁控股有限公司,北京 100070
- 折叠
摘要
钒渣钠化焙烧-水浸提钒过程会产生含有30％～40％Cr2O3的提钒尾渣,形成年堆积百万吨固废.通过加入高铁赤泥协同还原提钒尾渣,赤泥中的Fe2O3在低于铬氧化物初始还原温度下已经被C还原,促使铬还原反应快速进行,从而提升Cr的回收效率.使用FactSage热力学软件对整个反应体系进行模拟,计算了原料铬铁比、炉渣碱度和配C/Si量对铬、硫元素分配行为的影响,得到原料适宜的铬铁比是0.18,炉渣碱度是1.8,配C量nC/O=1.1,配Si量nSi/O=0.2.该研究为含铬提钒尾渣和高铁赤泥的资源化处理和增值化应用提供了一种新的可行性方案.
Abstract
The process of blast furnace iron-oxygen top blowing converter blowing vanadium extraction-vanadium slag followed by sodium roasting-water leaching and vanadium extraction will form vana-dium tailings containing 30％～40％Cr2O3,forming an annual accumulation of millions of tons of solid waste.In this study,the vanadium tailings were extracted by synergistic reduction of high-iron red mud,and the Fe2O3 in the red mud was reduced by carbon at a temperature lower than the initial reduction temperature of chromium oxide,which promoted the rapid progress of chromium reduction and im-proved the recovery efficiency of Cr.The whole reaction system was simulated by FactSage thermody-namic software,and the effects of the chromium iron ratio,slag alkalinity and C/Si content on the parti-tion behavior of chromium and sulfur were calculated.The suitable Cr/Fe ratio of the raw materials was 0.18,the alkalinity of the slag was 1.8,the amount of carbon was nC/O=1.1,and the amount of Si was nSi/O=0.2.This study provides a new feasible scheme for the resource treatment and value-added applic-ation of Cr-containing vanadium tailings and high-iron red mud.
关键词
提钒尾渣/高铁赤泥/协同还原/铬回收/脱硫/热力学计算Key words
vanadium residue removal disposal/high iron red mud/synergistic reduction/chromium extraction/desulfurization/thermodynamic calculation引用本文复制引用
基金项目
国家"十三五"重点专项资助项目(U1960201)
国家自然科学基金钢铁联合基金资助项目(2019YFC1905701)
出版年
2024
国家科技期刊平台
NSTL
万方数据