铝电解净化收尘灰与废焦油协同利用工艺技术研究  

Research on Synergistic Utilization Technology of Dust and Waste Tar of Aluminum Electrolytic Purification

作　　者：虎兴茂 尚文祥 张军立 马青山 杨洪亮 HU Xingmao;SHANG Wenxiang;ZHANG Junli;MA Qingshan;YANG Hongliang

机构地区：[1]国家电投集团宁夏能源铝业科技工程有限公司,宁夏青铜峡751603

出　　处：《绿色矿冶》2023年第4期31-35,共5页Sustainable Mining and Metallurgy

基　　金：宁夏回族自治区重点研发计划后支持项目(2022BDE92044)。

摘　　要：铝电解阳极块和阴极炭块生产过程中产生大量的净化废物收尘灰与废焦油。收尘灰固定碳含量超过85%,具有较高的二次资源利用价值;废焦油含多种无机和有机化合物,是一种易燃品,可用作燃料,还可用作碳素制品粘合剂及制备其他合成纤维的原料。本文研究一种收尘灰与废焦油协同利用制备型焦的工艺,以收尘灰为原料,利用废焦油和沥青为粘合剂,通过搅拌、混捏、压块成型,在高温电阻炉内焙烧,最后生成型焦。试验过程表明,该工艺生产的型焦能够达到预期的技术指标,型焦产品固定碳含量>96%,灰分<4%,硫含量<0.5%,可以用作炼钢厂优质增碳剂、其他金属冶炼还原剂或高热量燃料,实现电解铝固(危)废的高值化利用,对电解铝行业节能减排具有重要的意义。A large amount of purified waste dust and waste tar are produced in the production process of aluminum electrolysis anode block and cathode carbon block.The fixed carbon content of dust is more than 85%,which has high secondary resource utilization value.Containing a variety of inorganic and organic compounds,waste tar is a flammable product that can be used as a fuel,and binder for carbon products and other synthetic fiber raw materials.In this paper,a process for preparing formed coke by synergistic utilization of dust collection dust and waste tar was studied.With dust collection dust as raw material,waste tar and asphalt as binder,through stirring,kneading,briquetting,roasting in high temperature resistance furnace,and finally forming formed coke.The test process shows that the formed coke produced by this process can achieve the expected technical indicators.The fixed carbon content of the formed coke product is>96%,the ash content is<4%,and the sulfur content is<0.5%.It can be used as a high-quality recarburizer for steel mills,other metal smelting reductants or high-calorie fuels.This method can achieve high-value utilization of electrolytic aluminum solid(hazardous)waste,which is of great significance for energy conservation and emission reduction in the electrolytic aluminum industry.

关 键 词：铝电解 收尘灰 废焦油 型焦 危险废物 高值化利用 

分 类 号：TF821[冶金工程—有色金属冶金]