采用沉淀法合成6种不同掺杂方铅矿,并通过浮选实验考察杂质对方铅矿浮选性能的影响;采用微量热法测量含不同杂质原子的方铅矿表面吸附黄药的热力学和动力学参数;采用密度泛函理论对黄药分子在不同掺杂方铅矿表面的吸附构型和吸附能进行模拟计算.浮选实验结果表明:银、铋杂质能够显著提高方铅矿的回收率,而锌、锑、锰、铜杂质降低了方铅矿的浮选回收率.微量热动力学结果表明:含杂质方铅矿的吸附热与浮选回收率呈正比关系.黄药在含银和铋方铅矿表面的吸附热和反应速率常数均比纯方铅矿的大,对应的浮选回收率较高,而含铜和含锑方铅矿的吸附热和反应速率常数均比纯方铅矿的小,对应的浮选回收率较低.同时还分析了黄药在掺杂方铅矿表面的不饱和吸附热和黄药在杂质原子上的吸附能的关系.
参考文献
[1] | 李玉琼;陈建华;陈晔;郭进.杂质对黄铁矿电子性质及反应活性影响的密度泛函理论研究[J].中国有色金属学报(英文版),2011(8):1887-1895. |
[2] | Li, Y.-Q.;Chen, J.-H.;Guo, J..DFT study of influences of As, Co and Ni impurities on pyrite (1 0 0) surface oxidation by O_2 molecule[J].Chemical Physics Letters,20114/6(4/6):389-392. |
[3] | Ye Chen;Jianhua Chen;Jin Guo.A DFT study on the effect of lattice impurities on the electronic structures and floatability of sphalerite[J].Minerals Engineering,201014(14):1120-1130. |
[4] | Ye Chen;Jianhua Chen.The first-principle study of the effect of lattice impurity on adsorption of CN on sphalerite surface[J].Minerals Engineering,20109(9):676-684. |
[5] | Ye Chen;Jianhua Chen;Lihong Lan.The influence of the impurities on the flotation behaviors of synthetic ZnS[J].Minerals Engineering,2012:65-71. |
[6] | Jianhua Chen;Lei Wang;Ye Chen;Jin Guo.A DFT study of the effect of natural impurities on the electronic structure of galena[J].International Journal of Mineral Processing,20113/4(3/4):132-136. |
[7] | Chen, Jianhua;Ke, Baolin;Lan, Lihong;Li, Yuqiong.Influence of Ag, Sb, Bi and Zn impurities on electrochemical and flotation behaviour of galena[J].Minerals Engineering,2015:10-16. |
[8] | Mian Ji;Mingyan Liu;Shengli Gao;Qizhen Shi.A new microcalorimeter for measuring thermal effects[J].Instrumentation science & technology: Designs and applications for chemistry, biotechnology, and environmental science,20011(1):53-57. |
[9] | 李玉琼;陈建华;蓝丽红;郭进.氧分子在黄铁矿和方铅矿表面的吸附[J].中国有色金属学报,2012(4):1184-1194. |
[10] | 蓝丽红;陈建华;李玉琼;陈晔;郭进.空位缺陷对氧分子在方铅矿(100)表面吸附的影响[J].中国有色金属学报,2012(9):2626-2635. |
[11] | 高胜利;陈三平;胡荣祖;李焕勇;史启祯.化学反应的热动力学方程及其应用[J].无机化学学报,2002(4):362-366. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%