低品位高硫高碳铝土矿除硫脱硅脱碳工艺研究  

Study on Desulfurization, Desilication and DecarburizationProcess of Low Grade High Sulfur and High Carbon Bauxite

作　　者：王松林 WANG Songlin(China Aluminum Zhongzhou Aluminum Industry Co.,Ltd.,Jiaozuo 454000,China)

机构地区：[1]中铝中州铝业有限公司,河南焦作454000

出　　处：《绿色矿冶》2025年第2期75-80,共6页Sustainable Mining and Metallurgy

摘　　要：本文介绍了国内铝土矿中高硫矿物和高碳矿物对拜耳法生产流程的危害和影响,系统梳理了目前脱硫除碳技术的应用现状,并着重介绍了某氧化铝企业除硫脱硅脱碳工艺实践。该氧化铝企业结合河南三门峡地区铝土矿的特性,经过工艺改造和捕收剂配方优化,提出了低品位高硫铝土矿的正浮选同步脱硫脱硅工艺,在脱硅率保持60%~65%的前提下,可以获得60%~70%的脱硫率;针对含硫量大于2.0%的高硫铝土矿提出了反浮选脱硫工艺,脱硫率达到85%左右;同时结合烧结法工艺和拜耳法工艺的优势,提出了低成本流程脱碳工艺,脱碳率达到30%左右。注重源头除杂与流程除杂的结合,是今后高效经济利用高硫高碳铝土矿的方向。This paper introduced the harm and influence of high sulfur minerals and high carbon minerals in domestic bauxite on the Bayer process production process,systematically combed the current application status of desulfurization and decarbonization technology,and emphatically introduced the practice of desulfurization,desiliconization and decarbonization process in an alumina enterprise.Combined with the characteristics of bauxite in Sanmenxia area of Henan Province,the alumina enterprise proposed a positive flotation synchronous desulfurization and desilication process for low-grade high-sulfur bauxite after process modification and collector formula optimization.Under the premise of desilication rate of 60%-65%,the desulfurization rate of 60%-70%can be obtained.A reverse flotation desulfurization process was proposed for high-sulfur bauxite with sulfur content greater than 2.0%,and the desulfurization rate reached about 85%.At the same time,combined with the advantages of sintering process and Bayer process,a low-cost process decarburization process was proposed,and the decarburization rate reached about 30%.Focusing on the combination of source impurity removal and process impurity removal is the direction of efficient and economical utilization of high-sulfur and high-carbon bauxite in the future.

关 键 词：脱硫 脱碳 脱硅 浮选 反浮选 

分 类 号：TF821[冶金工程—有色金属冶金]