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Process for processing complex gold ore containing copper and arsenic

A complex and gold mine technology, applied in the improvement of process efficiency, wind shaker, flotation and other directions, can solve the problems of easy consumption of sodium cyanide, low leaching rate, etc., and achieve good economic benefits, high technical indicators, process equipment simple effect

Inactive Publication Date: 2012-03-14
GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cyanide method has a very low leaching rate for gold-bearing sulfide ores and large grains of elemental gold, and arsenopyrite, copper, etc. tend to consume a large amount of sodium cyanide

Method used

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  • Process for processing complex gold ore containing copper and arsenic
  • Process for processing complex gold ore containing copper and arsenic
  • Process for processing complex gold ore containing copper and arsenic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A complex gold ore containing copper and arsenic is mainly composed of useful minerals such as chalcopyrite, gold and arsenopyrite. Gangue minerals are mainly quartz, feldspar and clay minerals, etc., some of which are oxidized on the surface of arsenopyrite. Gold exists in arsenopyrite, chalcopyrite and gangue.

[0030] The copper content in the ore is 1.2%, the arsenic content is 2.87%, and the gold content is 10g / t (both are percentages by weight).

[0031] Using the method of the present invention, the raw ore is ground to -150 μm, and the shaker gravity separation enriches the arsenopyrite. The roasting temperature of the gravity separation concentrate is 750° C., the temperature for collecting arsenic in a low-temperature cloth bag is 120° C., and the leaching particle size of the calcined sand is -44 μm60 %, the liquid-solid ratio is 1.5:1, add protected soda lime 4kg / t, after the pH is stabilized above 11.5, add sodium cyanide 5kg / t, leaching for 72h; Flotatio...

Embodiment 2

[0035] Ore source is with embodiment 1.

[0036] Using the method of the present invention, the raw ore is ground to -120 μm for shaking table gravity separation to enrich the arsenopyrite-loaded arsenic. The roasting temperature of the gravity separation concentrate is 700° C., the temperature for collecting arsenic in a low-temperature cloth bag is 100° C., and the calcine leaching particle size is - 74μm90%, the liquid-solid ratio is 2:1, add protected soda lime 4kg / t, after the pH is stabilized above 11.5, add sodium cyanide 4kg / t, and leaching for 72h; - Isopropyl-N-ethylthiocarbamate and sodium diethylaminodithiocarbamate 1:1 flotation of chalcopyrite, flotation pulp concentration is 30%, the total dosage of chemicals is 70g / t, flotation The time is 16 minutes; Gravity separation tailings (-44μm 60%) are adjusted to a liquid-solid ratio of 2:1, 4kg / t of protected soda lime is added, and after the pH is stabilized to above 11.5, 1.5kg / t of sodium cyanide is added. Leach ...

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Abstract

The invention relates to a process for processing a complex gold ore containing copper and arsenic. The complex gold ore containing copper and arsenic is processed by combining the steps of reselecting, floating, cyaniding and leaching, calcinating arsenic ore concentrate. The process of the invention comprises the following steps: grinding the raw ore to certain granularity, by using the specific gravity difference of mispickel, copper sulphide and gold, separating mispickel and coarse monomer gold with high specific gravity (gold loading or gold unloading) by using reselection, enriching middling by using flotation to obtain (gold loading or gold unloading) copper concentrate, leaching tailing (if gold-loading gangue ) by cyaniding and stirring to extract fine particle gold in gangue, reselecting arsenic concentrate to calcinate, recovering As2O3 by using low temperature cloth bag arsenic collection technology through air cooling or water cooling, and leaching calcine (if gold-loading calcine) by stirring and cyaniding. The process of the invention has simple device, obtains high technical index, and provides good economic benefit to mine.

Description

technical field [0001] The invention relates to a process for processing complex gold ores containing copper and arsenic. The arsenic referred to in the present invention is the arsenic in the arsenopyrite, and the copper is the copper in the copper sulfide. Gold exists in ore in any form, and its carrier is arsenopyrite, copper sulfide and gangue, or one or both of them. Background technique [0002] With the rapid development of the gold industry, the gold ore resources that are easy to develop with a single technology are gradually exhausted, and the refractory gold ore resources have become the main raw materials for my country's gold industry in the future. There are many kinds of occurrence states of gold. In some complex metal ores, part of gold exists in gangue in the form of fine and submicron particles, part of gold exists in the same form in sulfide ores such as arsenopyrite, and part of gold exists in sulfide ore. Among valuable metal minerals such as copper, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B11/00C22B11/08C22B1/00B03B4/02B03D1/012C22B30/04C22B15/00
CPCY02P10/20
Inventor 李文娟宋永胜周桂英刘爽屈伟
Owner GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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