中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 34 No. 8 August 2024 |
（1. School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China;
2. School of Chemical Engineering, China University of Mining and Technology, Xuzhou 221163, China;
3. School of Materials Science and Engineering, Shenyang Ligong University, Shenyang 110159, China;
4. Ansteel Beijing Research Institute Co., Ltd., Beijing 102200, China）
Abstract:To achieve efficient flotation separation of brucite and calcite, flotation separation experiments were conducted on two minerals using dodecylamine (DDA) as the collector and potassium dihydrogen phosphate (PDP) as the regulator. The action mechanism of DDA and PDP was explored through contact angle measurement, zeta potential detection, solution chemistry calculation, FTIR analysis, and XPS detection. The flotation results showed that when DDA dosage was 35 mg/L and PDP dosage was 40 mg/L, the maximum floating difference between brucite and calcite was 79.81%, and the selectivity separation index was 6.46. The detection analysis showed that the main dissolved component HPO42- of PDP is selectively strongly adsorbed on the Ca site on the surface of calcite, promoting the adsorption of the main dissolved component RNH+ 3 of DDA on calcite surface, while brucite is basically not affected by PDP. Therefore, PDP is an effective regulator for the reverse flotation separation of brucite and calcite in DDA system.
Key words: brucite; calcite; selective adsorption; flotation separation
