烷基羟丙基胺作用下石英和赤铁矿的浮选行为

Flotation Behavior of Quartz and Hematite in the Presence of Alkyl Hydroxypropyl Amine

通过浮选试验研究了新型捕收剂烷基羟丙基胺(NDIA)作用下石英和赤铁矿的浮选行为,并结合量子化学计算和zeta电位分析,考察了该捕收剂在矿物表面的吸附机理.单矿物浮选试验结果表明:当捕收剂用量为33.33 mg/L,p H值为4.50~8.00时,石英的回收率在92%以上,赤铁矿的回收率在50%左右.人工混合矿分选试验结果表明:当捕收剂用量为33.33 mg/L,淀粉用量为13.33 mg/L,p H值为4.50~8.00时,NDIA均可实现石英和赤铁矿的有效分离.量子化学计算结果表明,与十二胺相比,NDIA对石英具有更好的捕收性能.zeta电位测试结果表明:NDIA在石英和赤铁矿表面均发生了吸附,且在石英表面的吸附作用强于赤铁矿.

Flotation behaviors o f quartz and hematite in the presence o f a new collector alkyl hydroxypropyl amine （NDIA ） were investigated through flotation experiments. Combined with quantum chemical calculation and zeta potential analysis,the adsorption mechanism o f N D IA on the mineral surface was studied. Flotation results o f pure mineral showed that the flotation recovery of quartz was above 92% and the flotation recovery o f hematite was around 50%,when the dosage of NDIA was 33. 33 mg/L,and pH value o f the pulp was set from 4. 50 to 8. 00. Flotation results of artificial mixed mineral showed that quartz and hematite were effectively separated,when the dosage of NDIA was 33. 33 mg/L,the dosage o f starch was 13. 33 m g /L and pH value of the pulp was set from 4. 50 to 8. 00. The results of quantum chemistry calculation indicated that NDIA had a better flotation performance than DDA to quartz. According to the results of zeta potential test, NDIA was adsorbed on both quartz and hematite surface, but the adsorption ability of NDIA on quartz surface was much stronger than that on hematite.