一种新型增效剂协同下铝土矿的油酸浮选  

Beneficiation Experiment on Oleic Acid Flotation of Bauxite Ore Collaborated with a New Synergistic Agent

作　　者：曹学锋[1] 高建德[1] 刘润清[1] 朱溢洋 

机构地区：[1]中南大学资源加工与生物工程学院,湖南长沙410083

出　　处：《金属矿山》2014年第8期65-68,共4页Metal Mine

基　　金：国家高技术研究发展计划(863计划)项目(编号:2013AA064102);国土资源部公益性行业科研专项(编号:201011031)

摘　　要：针对脂肪酸类捕收剂用于铝土矿正浮选脱硅所存在的捕收剂效率低、用量大问题,配制了一种新型的脂肪酸类捕收剂的增效剂DT。用该增效剂协同油酸对河南某低铝硅比一水硬铝石型铝土矿进行脱硅粗选条件试验,结果表明:DT与油酸的合适配比为2∶8。在此配比下,500 g/t DT+油酸所获粗精矿的氧化铝回收率比500 g/t单一油酸所获粗精矿的氧化铝回收率高出8.90个百分点,而单一油酸要取得与配比为2∶8的DT+油酸相近的粗选氧化铝回收率,用量需达到800 g/t。在粗选条件试验和开路流程试验基础上进行闭路流程试验,结果表明:以碳酸钠为pH调整剂、配比为2∶8的DT+油酸为捕收剂,在-74μm占93%磨矿细度下,经1次粗选、2次精选,可将矿石的铝硅比从3.27提高到8.13,氧化铝回收率达到76.67%,而DT+油酸的全流程总用量仅800 g/t。由以上试验结果可知,所配制的增效剂DT对油酸有显著的增效作用。In view of problems of low efficiency and large dosage of fatty acid as collector in desilication by direct flotation of bauxite,a new synergistic agent DT for fatty acid is prepared to enhance the collecting performance.Conditioning tests of coarse flotation for desilication was carried out on a low Al /Si ratio diasporic bauxite using oleic acid synergist with synergistic agent.The results show that the optimum ratio of DT to oleic acid is 2∶ 8.Adopting this ratio,Al2O3 recovery of rough concentrate by using DT ＋ oleic acid at 500 g /t is 8.90 % higher than that by single oleic acid at 500 g /t,while dosage of oleic acid should be increased to 800 g /t to achieve the same concentration index as mixture ratio of DT ＋ oleic acid at 2∶ 8.The closed circuit operation on the basis of rough concentration and open circuit process are carried out.It is shown that using sodium carbonate as pH modifier,DT ＋ oleic ratio of 2∶ 8 as collector,at the grinding fineness of 74 μm passing 93%,Al /Si ratio of the ore is increased from 3.27 to 8.13 with Al2O3 recovery of 76.67% through one roughing,two cleaning flotation,while the total dosage of DT ＋ oleic acid is only 800 g /t.To sum up,the synergistic agent DT can significantly increase the performance of oleic acid.

关 键 词：铝土矿 正浮选脱硅 油酸 增效剂DT 

分 类 号：TD952.5[矿业工程—选矿] TD923