自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

您目前所在的位置:首页 - 期刊简介 - 详细页面

中南大学学报(英文版)

Journal of Central South University

Vol. 9    No. 1    March 2002

[PDF Download]    [Flash Online]

    

Potential control flotation of galena in strong alkaline media
GUGuo-hua1(顾帼华),HUYue-hua1(胡岳华),QIUGuan-zhou1(邱冠周),
WANGHui1(王 晖),WANG Dian-zuo2(王淀佐)

1.Department ofMineral Engineering, Central South University, Changsha410083, China;
2.Beijing General Research InstituteforNonferrous Metals, Beijing100083, China

Abstract:The electrochemical oxidation of galena in collectorless and collector flotation systems, particularly in strong alkaline media, was studied. The results show that, with pHvalue higher than 12.5 and potentials below 0.17 V, the oxidation products ofgalena are elemental sulfur andHPbO-2. Elemental sulfurwas present on the mineral surface in excess of oxidized lead species due to dissolution of HPbO-2, which is beneficial to the flotation of galena. Under the same conditions, sphalerite and pyrite were depressed as a result of significant surface oxidation. Diethyldithiocarbamate (DDTC) was found to be the most suitable collector for galena flotation in strongly alkaline media. The very potential produced hydrophobic PbD2—the surface reaction product of DDTC with galena, is 0 to 0.2 V. Meantime DDTC can depress the surface over-oxidation of galena .Investigations also indicate that, in the range of -0.9 V to 0.6 V, hydrophobic PbD2can be firmly adsorbed on galena.

 

Key words: galena; potential control flotation; collector

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
版权所有:《中南大学学报(自然科学版、英文版)》编辑部
地 址:湖南省长沙市中南大学 邮编: 410083
电 话: 0731-88879765 传真: 0731-88877727
电子邮箱:zngdxb@csu.edu.cn 湘ICP备09001153号