Leaching method for complicated cupric sulfide aurin ore

A copper sulfide and gold concentrate technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, chemical/physical processes, etc., can solve difficult leachate treatment, high power consumption, high equipment requirements, etc. problem, to achieve the effect of easy control of technical conditions, less oxygen consumption, and low equipment investment

Active Publication Date: 2006-08-23
厦门紫金矿冶技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Problems in the disclosed technology: high equipment requirements, large investment costs, difficult control of technical conditions, inconvenient operation, high risk, difficult recovery of precious metals, sulfur cannot be recovered, sulfuric acid produced needs to be neutralized, large amount of slag, high cost , it is not easy to realize industrialization, some technical schemes add chlorine salt with high concentration, which will seriously corrode the equipment, some technical schemes have too high oxidant regeneration cost, and the leachate is difficult to handle, and some technical schemes require fine g...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Use -0.074mm particle size to account for more than 90% ore, ore pulp solid concentration 10-40%, leaching reagent uses 0.1-1.0mol / L dilute sulfuric acid, feeds oxygen with a concentration of 21-96%, and adds 0.1-0.5mol / L Catalysts of any one of iron sulfate, vanadium oxide or a combination thereof, stirred and leached in a leaching tank at a temperature of 60-100°C under normal pressure, the maximum linear velocity of stirring is 4-5m / s, and the leaching time is 2-8 Hours, and then through the follow-up process, the actual measurement: the leaching rate of copper> 95%, the leaching rate of gold> 97%, the leaching rate of silver> 93%, the recovery rate of sulfur> 89%, low impurity content, pyrite basically no Oxidized, oxygen consumption 50Nm 3 / t.

Embodiment 2

[0021] Other conditions are the same as in Example 1, except adding any one or combination of catalysts in ferric nitrate, ferric sulfate, ferric chloride, vanadium oxide, manganese compound, titanium compound, consumption is 0.05~1.0mol / L, leaching time More than 8 hours, actual measurement: the leaching rate of copper, gold and silver is up to 80%, the recovery rate of sulfur is up to 75%, the impurity content is slightly high, the pyrite is basically not oxidized, and the oxygen consumption is 80Nm 3 / t.

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PUM

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Abstract

The present invention relates to wet metallurgical technology, and is especially leaching process of complicated cupric sulfide aurin ore. The process includes stirring leaching ore slurry under normal pressure oxidizing condition, extraction, cyanidation-zinc powder displacement to recover Au, Ag and Cu, and floating to enrich and hot filtering to recover sulfur. In the stirring leaching step, one or several of ferric nitrate, ferric sulfate, ferric chloride, vanadium oxide, manganese oxide and titanium oxide as catalyst to alter the surface activity of the cupric sulfide is added in the amount of 0.05-1.0 mol/L. The present invention has the features of normal pressure and normal pressure leaching, easy control, low production cost, environment friendship, etc.

Description

1. Technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to a method for leaching complex copper-gold sulfide concentrates. 2. Background technology [0002] Industry insiders believe that complex copper-gold sulfide concentrates refer to complex minerals containing chalcopyrite, pyrite, copper blue, sphalerite, chalcocite, arsenopyrite, pentlandite and other components in the mineral composition. Complex copper-gold sulfide concentrates have the characteristics of wide distribution, large reserves, and difficult leaching. At present, the leaching methods of complex copper-gold sulfide concentrates in the research stage are relatively concentrated on wet oxidation technology, mainly including: the published "high temperature and high pressure full oxidation technology", "medium temperature and low pressure leaching technology", "low temperature and low pressure leaching technology ", "Bacterial Oxidation Leaching Technology", ...

Claims

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Application Information

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IPC IPC(8): C22B3/04B01J27/25B01J27/053B01J27/128B01J23/20B01J23/34B01J21/06
Inventor 邹来昌邱财华黄怀国
Owner 厦门紫金矿冶技术有限公司
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