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有色金属(冶炼部分):2024,(11):197-207
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含砷固废高值利用探索:砷碱浸出渣无害化制备高强陶粒
桑孟超1, 彭竣2, 王宇峰1, 孙伟1, 韩海生1
(1.中南大学资源加工与生物工程学院;2.冷水江锑都环保有限责任公司)
Exploration of High-Value Utilization of Arsenic-containing Solid Waste: Harmless Preparation of High Strength Ceramic Aggregates from Arsenic-Alkaline Leaching Residues
SANG Mengchao1, PENG Jun, WANG Yufeng, SUN Wei2, HAN Haisheng
(1.中南大学;2.School of Minerals Processing and Bioengineering)
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投稿时间:2024-09-10    修订日期:2024-09-12
中文摘要: 砷碱浸出渣与陶粒主要组分SiO2、Al2O3和碱性金属氧化物的原料组成具有一定相似性,其火法脱砷工艺与陶粒烧制工艺也极为相近。提出砷碱浸出渣脱砷收锑无害化制备陶粒的思路,通过还原焙烧将砷、锑挥发脱除后在烟气中进行捕集,捕集产物可直接返回锑冶炼系统,并在此基础上进行陶粒制备工艺探索。研究结果表明:在控制石英与氧化铝质量比Si/Al=6.5,碱金属氧化物(Na2O、CaO、Fe2O3、K2O、MgO,下同)在陶粒原料(指砷碱浸出渣、石英、氧化铝)中的质量总占比为15%,外配炭量质量分数5%时,采用随炉升温、随炉降温的方式在氩气气氛中970 ℃保温30 min,最终得到表观密度1 022 kg/m3,抗压强度为46.1 MPa的高强陶粒,砷、锑残留量分别为0.020%和0.44%,砷、锑挥发率分别达到99.19%和92.5%。研究结果为砷碱浸出渣及其他含砷固废的高值化利用提供了借鉴。
中文关键词: 砷碱浸出渣  陶粒    
Abstract:The arsenic-alkaline leaching residue and the primary components of ceramic aggregates, including SiO2、Al2O3, and alkaline metal oxides, share certain compositional similarities. Moreover, the pyrometallurgical arsenic removal process closely resembles the ceramic aggregate firing process. In this study, a method for the harmless preparation of ceramic aggregates from arsenic-alkaline leaching residues by removing arsenic and antimony was proposed. The arsenic and antimony was volatilized and removed by reduction roasting and then captured in flue gas. The captured products can be returned directly to the antimony smelting system. On this basis, the preparation technology of ceramic aggregate was explored. The research results indicate that by controlling the mass ratio of quartz to alumina ratio of Si/Al=6.5, the total mass ratio of alkali metal oxides (Na2O, CaO, Fe2O3, K2O, MgO, the same below) in ceramic aggregate raw materials (refers to arsenic and alkali leaching residue, quartz, alumina) of 15%, along with an additional 5% of external carbon, high-strength ceramic aggregates with an apparent density of 1 022 kg/m3 and a compressive strength of 46.1 MPa can be produced by heating and cooling with the furnace in an argon atmosphere at 970 ℃ for 30 minutes. The residual amounts of arsenic and antimony is 0.020% and 0.44%, respectively, and the volatilization rate of arsenic and antimony is 99.19% and 92.5%, respectively. The research results provide a reference for the high-value utilization of arsenic-alkaline leaching residues and other arsenic-containing solid wastes.
文章编号:     中图分类号:    文献标志码:
基金项目:湖南省“揭榜挂帅”项目(2023ZJ1110)
引用文本:
桑孟超,彭竣,王宇峰,孙伟,韩海生.含砷固废高值利用探索:砷碱浸出渣无害化制备高强陶粒[J].有色金属(冶炼部分),2024(11):197-207.
SANG Mengchao,PENG Jun,WANG Yufeng,SUN Wei,HAN Haisheng.Exploration of High-Value Utilization of Arsenic-containing Solid Waste: Harmless Preparation of High Strength Ceramic Aggregates from Arsenic-Alkaline Leaching Residues[J].Nonferrous Metals (Extractive Metallurgy),2024(11):197-207.

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