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金属矿山 ›› 2008, Vol. 38 ›› Issue (9): 65-67.

• 矿物工程 • 上一篇    下一篇

低碱度铜硫分离抑制剂及抑制机理的研究

余新阳1,2,周源1,钟宏2   

  1. 1.江西理工大学;2.中南大学
  • 收稿日期:2008-07-29 出版日期:2008-09-15 发布日期:2011-07-14

Depressor for Cu-S Separation in Low Alkaline Medium and Its Depressing Mechanism

Yu Xinyang1,2,Zhou Yuan1,Zhong Hong2   

  1. 1.Jiangxi University of Science and Technology;2.Central South University
  • Received:2008-07-29 Online:2008-09-15 Published:2011-07-14

摘要: 在pH=7~8低碱度条件下,以Ca(ClO)2抑制黄铁矿,进行铜硫浮选分离试验,并探讨了Ca(ClO)2对黄铁矿的抑制机理。试验表明,Ca(ClO)2是黄铁矿的良好抑制剂,在矿浆pH=7~8低碱度条件下,不添加石灰,只需加入少量的Ca(ClO)2抑制剂,就可以很好地抑制黄铁矿,实现铜硫分离。Ca(ClO)2作用前后黄铁矿矿物表面拉曼光谱分析表明, Ca(ClO)2抑制黄铁矿实现铜硫分离的机理为在矿浆pH=7~8低碱度条件下,Ca(ClO)2氧化黄铁矿表面,使其表面产生主要成分为Fe(OH)3和CaCO3的亲水薄膜,提高了亲水性,使其在铜硫浮选分离作业中被充分抑制,从而实现铜硫分离。

关键词: 铜硫分离, 黄铁矿, 抑制剂

Abstract: Cu-S separation test was conducted at pH=7~8 with Ca(ClO)2 as the depressor for pyrite, and the depressing mechanism of Ca(ClO)2 for pyrite was studied. The test shows that Ca(ClO)2 is a good depressor for pyrite and good Cu-S separation can be achieved at a low alkalinity of pH=7~8 with only a small amount of Ca(ClO)2 but without lime. The analysis of Raman spectrograms before and after the addition of Ca(ClO)2 indicates that at a pH of 7~8, Ca(ClO)2 will oxidize the pyrite surface to produce a hygrophilous film of Fe(OH)3 and CaCO3 on it, which can enhance the hydrophilicity of pyrite surface, making it fully depressed so as to achieve a separation of copper from sulfur.

Key words: Cu-S separation, Pyrite, Depressor