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›› 2009, Vol. 9 ›› Issue (3): 441-448.

• 反应与分离 • 上一篇    下一篇

闪锌矿常压富氧浸出

陈永强 邱定蕃 王成彦 尹飞   

  1. 北京矿冶研究总院冶金所 北京矿冶研究总院 北京矿冶研究总院冶金所 北京矿冶研究总院冶金所
  • 收稿日期:2009-02-24 修回日期:2009-03-30 出版日期:2009-06-20 发布日期:2009-06-20
  • 通讯作者: 陈永强

Oxygen-rich Leaching of Sphalerite Concentrate under Normal Pressure

CHENG Yong-qiang QIU Ding-fan WANG Chen-yan YIN Fei   

  1. Beijing General Research Institute of Mining & Metallurgy Beijing General Research Institute of Mining and Metallurgy, Beijing Beijing General Research Institute of Mining & Metallurgy Beijing General Research Institute of Mining & Metallurgy
  • Received:2009-02-24 Revised:2009-03-30 Online:2009-06-20 Published:2009-06-20
  • Contact: CHENG Yong-qiang

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摘要： 研究了反应釜中闪锌矿精矿常压富氧浸出过程，得出了最佳浸出条件：精矿粒度<44 mm的大于92%，浸出温度373 K，转速800 r/min，浸出液固比5 mL/g, [Zn]始=0.76 mol/L，酸锌摩尔比H2SO4/Zn=1.27，氧分压pO2=0.3 MPa，浸出时间5 h. 在此条件下，锌的浸出率大于95%. 对锌精矿和浸出渣的工艺矿物学研究结果表明，闪锌矿等主要矿物的浸出过程以生成H2S的反应为主，H2S再被氧化成元素硫，从而实现矿物的浸出.

关键词: 闪锌矿, 常压富氧浸出, 反应机理

Abstract: Oxygen-rich leaching of sphalerite concentrate under normal pressure in a reactor was carried out. The optimal processing conditions were achieved as follows: particle size of more than 92% minus 44 mm, temperature of 373 K, agitator speed of 800 r/min, ratio of liquid to solid 5 mL/g, initial zinc concentration of leaching solution of 0.76 mol/L, ratio of sulfuric acid concentration to zinc concentration H2SO4/Zn at 1.27, oxygen partial pressure of 0.3 MPa, and leaching time of 5 h. The leaching rate of zinc was above 95%. The technological mineralogy of sphalerite concentrate and leaching residue was studied. The results indicated that the main reaction during leaching of sphalerite was ZnS+2H+?Zn2++H2S. The sulfuretted hydrogen was oxidized to sulfur.

Key words: sphalerite, oxygen-rich leaching under normal pressure, reaction mechanism

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