矿产保护与利用2022，Vol.42Issue(2)：100-106,7.DOI:10.13779/j.cnki.issn1001-0076.2022.02.013
螯合抑制剂BA PTA在菱镁矿与方解石浮选分离中的作用机理
Mechanism of Chelating Depressant BAPTA in Flotation Separation of Magne-site and Calcite
摘要
Abstract
It is difficult to achieve the effective separation of magnesite from calcite because of their similar chemical and crystal properties. As a Ca selective chelator, BAPTA was used to improve the flotation separation of magnesite and calcite. The flotation test results showed that BAPTA could selectively inhibit the upward flotation of calcite in the sodium oleate system，and the flotation recovery difference between magnesite (recovery:91.33%) and calcite (recovery: 11.25%) was large at pH 11.0，BAPTA dosage of 30 mg/L and sodium oleate dosage of 100 mg/L, which revealed that the flotation separation of magnesite and calcite could be realized. The selective depression mechanism of BAPTA was studied by Zeta potential，FTIR and XPS. The results indicated that BAPTA could selectively react with Ca on the surface of calcite，adsorb and cover the surface of calcite，prevent the adsorption of sodium oleate onto calcite surface，and eliminate the negative shift of zero electric point caused by sodium oleate on calcite. However, BAPTA had a little influence on Mg on the surface of magnesite，so it has a little effect on the adsorption of sodium oleate on magnesite.关键词
菱镁矿/方解石/BAPTA/选择性抑制/浮选分离Key words
magnesite/calcite/BAPTA/selective depression/flotation separation分类
矿业与冶金引用本文复制引用
印万忠,孙浩然..螯合抑制剂BA PTA在菱镁矿与方解石浮选分离中的作用机理[J].矿产保护与利用,2022,42(2):100-106,7.基金项目
国家自然科学基金面上项目(51874072、51974064和52174239) （51874072、51974064和52174239）
中央高校基本科研业务专项资金资助(N2101025) （N2101025）
