Gold extraction method by heap leaching

A heap leaching and gold technology, which is applied in the field of metallurgy and chemical industry, can solve the problems of volatilization of dripping liquid, severe freezing, and inability to continue operation, etc., and achieves obvious water-saving benefits, less evaporation, and less impact

Inactive Publication Date: 2014-08-13
INNER MONGOLIA PACIFIC MINING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the most commonly used is dripping with exposed pipes. Since the dripping pipe is located on the surface of the ore pile, it is easy to cause a large amount of dripping liquid to volatilize when the weather is hot; and during the frost period, the dripping pipe penetrates slowly and the ice is severe, so that it cannot be continued. Operation

Method used

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  • Gold extraction method by heap leaching
  • Gold extraction method by heap leaching
  • Gold extraction method by heap leaching

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Lay the bottom pad and set up the collection device, crush the raw ore and build a heap to obtain the ore heap;

[0065] Bury the dripping pipes into the ore heap, set the distance between the dripping pipes to 0.6 meters, and the depth of the dripping pipes to 0.6 meters. Strength is 7.0L / m 2 h, to obtain gold-containing precious liquid;

[0066] Pre-grinded and screened 6-8 mesh granular activated carbon is used to absorb the gold in the gold-containing precious liquid, and the gold-loaded carbon is extracted, and the gold-loaded carbon is desorbed to obtain a desorption liquid, and the desorption liquid is electrolyzed to obtain gold mud, and the gold mud is smelted get gold.

[0067] Among them, the gold-containing barren liquid is filtered to recover activated carbon; waste liquids such as desorption waste liquid and pickling neutralization waste liquid are added with 0.04% polyacrylamide for precipitation, and the precipitate is filtered; the filtered liquid is ...

Embodiment 2

[0070] Lay the bottom pad and set up the collection device, crush the raw ore and build a heap to obtain the ore heap;

[0071] Bury the dripping pipes into the ore heap, the distance between the dripping pipes is set to 0.8 meters, and the depth of the dripping pipes is 0.8 meters. The strength is 7.5L / m2 h, and the precious liquid containing gold is obtained;

[0072] Pre-grinded and screened 8-10 mesh granular activated carbon is used to adsorb the gold in the gold-containing precious liquid, and the gold-loaded carbon is extracted, and the gold-loaded carbon is desorbed to obtain a desorption liquid, and the desorption liquid is electrolyzed to obtain gold mud, and the gold mud is smelted get gold.

[0073] Among them, the gold-containing barren liquid is filtered to recover activated carbon; waste liquids such as desorption waste liquid and pickling neutralization waste liquid are added with 0.05% polyacrylamide for precipitation, and the precipitate is filtered; the fil...

Embodiment 3

[0076] Lay the bottom pad and set up the collection device, crush the raw ore and build a heap to obtain the ore heap;

[0077] Bury the dripping pipes into the ore heap, set the distance between the dripping pipes to 1.0 meters, and the depth of the dripping pipes to 1.0 meters. The strength is 8.0L / m2 h, and the precious liquid containing gold is obtained;

[0078] Pre-grinded and screened 10-12 mesh granular activated carbon is used to adsorb the gold in the gold-containing precious liquid, and the gold-loaded carbon is extracted, and the gold-loaded carbon is desorbed to obtain a desorption liquid, and the desorption liquid is electrolyzed to obtain gold mud, and the gold mud is smelted get gold.

[0079] Among them, the gold-containing barren liquid is filtered to recover activated carbon; waste liquids such as desorption waste liquid and pickling neutralization waste liquid are added with 0.06% polyacrylamide for precipitation, and the precipitate is filtered; the filte...

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Abstract

The invention relates to the fields of metallurgy and chemical engineering, particularly a gold extraction method by heap leaching. The method comprises the following steps: laying an base wad on a heap leaching site, wherein the base wad comprises a base layer, an impermeable layer and a protective layer from bottom to top, and a collector is arranged on the impermeable layer and under the protective layer; crushing raw ores, and heaping on the base wad to obtain an ore heap; burying a spray pipe into the ore heap, introducing a spray liquid into the spray pipe to spray the ore heap, and collecting by the collector to obtain a gold-containing rare solution, wherein the spray liquid is a sodium cyanide solution; and recovering the gold from the gold-containing rare solution. By adopting the buried-pipe spray process, the spray pipe is buried in the ore heap, so that the evaporation amount of the spray liquid in the spray pipe is small, and the water-saving benefit is obvious; and the method provided by the invention is slightly influenced by the ambient temperature, thereby ensuring continuous production in cold and arid regions.

Description

technical field [0001] The invention relates to the field of metallurgy and chemical industry, in particular to a method for extracting gold by heap leaching. Background technique [0002] With the large-scale mining of easy-to-mining mines, the development and utilization of low-grade ores and refractory gold ore resources has become an important task in gold mining. At present, heap leaching gold extraction technology has been popularized and applied in many countries due to its advantages of low cost and good benefit. [0003] Heap leaching gold extraction refers to building a heap of low-grade gold ore or flotation tailings on the bottom pad material, and circulating dripping with sodium cyanide solution to dissolve the gold and silver in the ore to form gold-containing precious liquid to recover gold. gold craft. At present, the most commonly used is dripping with exposed pipes. Since the dripping pipe is located on the surface of the ore pile, it is easy to cause a l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B11/08
Inventor 孙中建胡强李志远孟庆秋李冠华黄易周
Owner INNER MONGOLIA PACIFIC MINING
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