高硫铝土矿中硫的赋存状态及除硫

高硫铝土矿中硫的赋存状态及除硫

摘要：采用X射线衍射分析和化学物相定量法研究高硫铝土矿中硫的赋存状态,并对不同形态的硫的脱除方法进行研究.结果表明:高硫铝土矿中硫的存在形态有的以硫化物为主（主要是黄铁矿）,有的以硫酸盐为主,不同产地的铝土矿中硫的主要存在形态是不同的,进一步补充了铝土矿中硫的物相存在的规律性.采用X射线衍射结合化学物相定量法能更准确确定高硫铝土矿中硫的存在形态.确定高硫铝土矿中硫的主要存在形态对除硫方法的选择具有理论指导意义.不同形态的硫可以采用不同的除硫方法.采用氧化焙烧能有效脱除高硫铝土矿中硫化物型硫,原矿溶出液中S2-的含量均在1.7 g/L以上,而焙烧矿的溶出液中S2-的含量均在0.18 g/L以下.通过N2CO3溶液洗涤可以有效脱除矿石中硫酸盐型硫,原矿中全硫含量下降到0.2％以下,符合生产中对矿石中硫含量的要求.Abstract：The sulfur phase in high sulfur-containing bauxite was studied by an X-ray diffraction analysis and a chemistry quantitative analysis.The methods for the removal of different shaped sulfur were also discussed.The results show that sulfur phases in high sulfur-containing bauxites exist in the main form of sulfide sulfur (pyrite) or sulfate sulfur,and the main sulfur forms of bauxites from different regions are not the same.Through a combination of an X-ray diffraction analysis and a chemistry quantitative analysis,the sulfur phases of high sulfur-containing bauxite could be accurately investigated.Deciding the main sulfur form of high sulfur-containing bauxite could provide theoretical instruction for choosing methods for the removal of sulfur from bauxite,and an oxidizing-roasting process is an effective way to remove sulfide sulfur from high sulfur-containing bauxite,the content of S2- in crude ore in the digestion liquor is above 1.7 g/L,but in the roasted ore digestion liquor,it is below 0.18 g/L.Using the sodium carbonate solution washing technology to wash bauxite can effectively remove sulfate sulfur,the content of the total sulfur in ore is lowered to below 0.2％ and can meet the production requirements for the sulfur content. 作者： 胡小莲[1]陈文汨[2]谢巧玲[2] Author： HU Xiao-lian[1]  CHEN Wen-mi[2]  XIE Qiao-ling[2] 作者单位： 中南大学冶金科学与工程学院,长沙410083;湖南科技大学化学化工学院,湘潭411201中南大学冶金科学与工程学院,长沙,410083 期 刊： 中国有色金属学报（英文版）   ISTICEISCI Journal： Transactions of Nonferrous Metals Society of China 年，卷(期)： 2011, (7) 分类号： P575.5 关键词： 高硫铝土矿    硫化物相    氧化焙烧    碳酸钠洗涤    Keywords： high sulfur-containing bauxite    sulfur phase    oxidizing-roasting    sodium carbonate solution washing technology    机标分类号： TD9 TD8 机标关键词： 高硫铝土矿    赋存状态    除硫    high    quantitative analysis    存在形态    methods for    different    相定量法    射线衍射    硫含量下降    sodium carbonate    form of    物相    脱除    溶出液    硫酸盐    硫化物    化学物    方法 基金项目： theNationalNaturalScienceFoundationofChina，ScientificResearchFundofHunanProvincialEducationDepartment,China

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