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Pregnant solution impurity removing method for indirect gold mine heap leaching process

A technology of precious liquid and gold mine, applied in the direction of improving process efficiency, etc., can solve problems such as high cost, low sodium sulfide precipitation rate, complicated process, etc., and achieve the effect of wide pH range, good precipitation effect and simple process

Inactive Publication Date: 2019-01-04
新疆金川矿业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In gold heap leaching production, the long-term circulation of the leachate will accumulate a large amount of impurities such as copper, mercury, zinc, nickel, etc., which will seriously affect the effect of continuous leaching. Generally, the discharge of tailings from mines will cause environmental pollution. Sodium sulfide is usually used in this industry to remove impurities. , although the method is the same, the removal of impurities by sodium sulfide requires a pH of 3-6, acidification before removal of impurities, and adjustment of pH to 9-11 after removal of impurities before the waste water can be recycled, and the precipitation rate of sodium sulfide is low at the same time
The process of using sodium sulfide to remove impurities is complicated and the cost is high. At the same time, when the acid is removed, the solution will generate hydrogen cyanide gas, which will first cause the loss of sodium cyanide, and secondly cause environmental pollution. Third, if the sodium cyanide is recovered, the removal of impurities will be increased. complexity of the process

Method used

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  • Pregnant solution impurity removing method for indirect gold mine heap leaching process

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Effect test

Embodiment 1

[0021] A kind of impurity-removing method of precious liquid of indirect gold ore heap leaching process: add activated carbon adsorbent in the precious liquid of gold ore heap leaching, after about 20 days, the active carbon (containing gold Au, silver Ag, copper Cu, mercury Hg containing gold Au, silver Ag, copper Cu, mercury Hg , Nickel Ni, etc.) are taken out and desorbed to obtain desorption wastewater and activated carbon after desorption, the activated carbon after desorption is carried out pickling treatment, the activated carbon after the treatment can be reused, the acid wastewater obtained by the pickling treatment, and the desorption wastewater, And the smelting wastewater generated during the gold mud smelting process is put into the sedimentation tank, and the impurity removal agent is used for impurity removal treatment. The treated water can be returned to production for recycling, and the sediment is press-filtered and put into storage.

Embodiment 2

[0023] A method for removing impurities in expensive liquid of an indirect gold ore heap leaching process, adding activated carbon into the expensive liquid for gold ore heap leaching, and taking out the saturated activated carbon after 20 days for desorption to obtain desorption waste water and activated carbon after desorption. The activated carbon after desorption is pickled, and the acidic wastewater obtained by the pickling treatment, as well as the desorption wastewater, and the smelting wastewater generated when the gold mud is smelted are put into the sedimentation tank, and the high-efficiency impurity remover is used for the impurity removal treatment, and the sediment is cleaned. Press filtration, storage;

[0024] The high-efficiency impurity remover is a mixture of lime sulfur and polysodium chloride; the lime sulfur is boiled from a mixture of 1 part of lime, 2 parts of sulfur powder and 10 parts of water; The mixture of mixture and polysodium chloride, the weigh...

Embodiment 3

[0026] A kind of impurity removal method of precious liquid of indirect gold ore heap leaching process, activated carbon is added in the precious liquid of gold ore heap leaching, after 21 days, the activated carbon saturated with adsorption is taken out, desorbed, and desorption waste water and desorbed activated carbon are obtained, and The activated carbon after desorption is pickled, and the acidic wastewater obtained by the pickling treatment, as well as the desorption wastewater, and the smelting wastewater generated when the gold mud is smelted are put into the sedimentation tank, and the high-efficiency impurity remover is used for the impurity removal treatment, and the sediment is cleaned. Press filtration, storage;

[0027] The high-efficiency impurity remover is a mixture of lime sulfur and polysodium chloride; the lime sulfur is boiled from a mixture of 1 part of lime, 2 parts of sulfur powder and 10 parts of water; The mixture of mixture and polysodium chloride, ...

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Abstract

The invention discloses a pregnant solution impurity removing method for an indirect gold mine heap leaching process. The pregnant solution impurity removing method for the indirect gold mine heap leaching process comprises the steps of adding active carbon to gold mine heap leaching pregnant solution; after 10-30 days, taking out saturated-adsorbed active carbon to be desorbed to obtain desorption waste water and desorbed active carbon; pickling the desorbed active carbon; putting acidic waste water obtained by pickling, the desorption waste water and smelting wastewater generated during smelting gold mud into a settling pond; using an efficient impurity removing agent to remove impurities; filtering and pressing sediments; and putting the filtered and pressed sediments in storage. The pregnant solution impurity removing method of the indirect gold mine heap leaching process, disclosed by the invention, has the advantages that the impurity removing efficiency is high, the settling speed is high, the pH value range suitable for impurities such as copper, mercury, zinc and nickel is wide, the leaching of gold is not affected, long-term recycling and zero emission of a leaching solution are realized, the low concentration state of the impurities in the leaching solution is kept, the leaching rate is increased, and the impurity metal is recycled.

Description

technical field [0001] The invention relates to the technical field of gold production, and is a simple and effective leachate purification technology with almost no equipment investment, in particular to a precious liquid impurity removal method in an indirect gold ore heap leaching process. Background technique [0002] In gold heap leaching production, the long-term circulation of the leachate will accumulate a large amount of impurities such as copper, mercury, zinc, nickel, etc., which will seriously affect the effect of continuous leaching. Generally, the discharge of tailings from mines will cause environmental pollution. Sodium sulfide is usually used in this industry to remove impurities. , although the method is the same, the removal of impurities by sodium sulfide requires a pH of 3-6, acidification is required before removal of impurities, and the pH must be adjusted to 9-11 after removal of impurities before the waste water can be recycled, and the precipitation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/24C22B3/22C22B3/44C22B11/00
CPCC22B3/22C22B3/24C22B3/44C22B11/04Y02P10/20
Inventor 张景河金琪琳何涛高伟
Owner 新疆金川矿业有限公司
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