ROLE OF SODIUM HEXAMETAPHOSPHATE IN FLOTATION OF A NICKEL ORE

被引：10

作者：

Feng, Bo ^{[1
]}

Wang, Pengcheng ^{[1
]}

Lu, Yiping ^{[2
]}

Feng, Qiming ^{[2
]}

机构：

[1] Jiangxi Univ Sci & Technol, Jiangxi Key Lab Min Engn, Ganzhou, Peoples R China

[2] Cent S Univ, Sch Mineral Proc & Bioengn, Changsha, Hunan, Peoples R China

来源：

PHYSICOCHEMICAL PROBLEMS OF MINERAL PROCESSING | 2016年 / 52卷 / 01期

基金：

中国国家自然科学基金;

关键词：

nickel ore; lizardite; flotation; concentration process; pentlandite; PYRITE FLOTATION; SOLUTION CHEMISTRY; PARTICLE-SIZE; SERPENTINE; MECHANISMS; SEPARATION; LIZARDITE; PENTLANDITE; SURFACES;

D O I：

10.5277/ppmp160115

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this work, a role of sodium hexametaphosphate (SHMP) in the flotation performance of a nickel ore was studied and mechanism was discussed in detail. The results showed that the presence of lizardite interferes with the flotation performance of pentlandite. The adsorption of SHMP at the lizardite/solution interface and the removal of magnesium ions from lizardite surface overcompensated the positive charge on the lizardite particle, and made its zeta potential negative. The interaction between lizardite and pentlandite changed from attractive to repulsive in the presence of SHMP. Thus, the addition of SHMP made the mixed sample of pentlandite and lizardite more dispersed, and significantly reduced the adverse effect of lizardite on the flotation of pentlandite. However, when the content of lizardite in the mixed ore was increased, the effect of SHMP weakened. Therefore, in flotation of a nickel ore containing a large amount of lizardite (46% w/w), SHMP usage is not suitable at the roughing stage due to the fact that lizardite in the pulp will consume most of the SHMP, and hence the removal of lizardite slimes from pentlandite surface become impossible. Based upon the results, SHMP usage is found to be suitable at the cleaning stage to improve the grade of concentrate.

引用

页码：170 / 181

页数：12

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