您目前所在的位置:首页 - 期刊简介 - 详细页面

铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 9    No. 2    June 1999

[PDF Download]    [Flash Online]

    

ACTIVATION AND DEPRESSION OF CALCITE IN CALCIUM MINERALS FLOTATION
Tian Xueda1 and Zhang Xiaoyun1   Li Longfeng2 and Wang Dianzuo2

1Chemistry&Chemical Engineering College,Xiangtang University, Xiangtang411105, P. R. China;
2Department of Mineral Engineering,Central South University of Technology, Changsha 410083, P. R. China

Abstract:In the flotation of scheelite ore containing fluorite and calcite, the treatment of calcite is important to obtain satisfactory scheelite and fluorite concentrate. It is better in scheelite rougher flotation to activate calcite with Na2CO3and to float it into scheelite rough concentrate,than to depress calcite into fluorite flotation operation like the conventional process. By activating calcite with Na2CO3 in scheelite rougher flotation the fluorite flotation can be carried out more easily, and the fluorite concentrate with a grade of CaF2 97.42% and CaCO3 0.73%, compared with that of a grade of CaF2 95.78% and CaCO3 1.54% without Na2CO3, was gained. The calcite, which was activated and floated into scheelite rough concentrate, can be depressed and removed with Petrov’s process or acid leaching, so it has no obvious negative effect on scheelite concentrate. The mechanism of activation is due to homo-ion effect of  Na2CO3 in calcite pulp.

 

Key words: flotation calcite scheelite fluorite

ISSN 1672-7029
CN 43-1423/U

主管:中华人民共和国教育部 主办:中南大学 中国铁道学会 承办:中南大学
湘ICP备09001153号 版权所有:《铁道科学与工程学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市韶山南路22号 邮编:410075
电 话:0731-82655133,82656174   传真:0731-82655133   电子邮箱:jrse@mail.csu.edu.cn