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A method for extracting gold from gold-containing molybdenum concentrate

A technology of molybdenum concentrate and pulp, which is applied in the gold extraction field of gold-containing molybdenum concentrate, can solve the problem of inability to efficiently recover gold from molybdenum concentrate, and achieve the effect of simple method, significant economic benefit, and increased input and output

Active Publication Date: 2017-07-28
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

[0003] However, the existing all-slime cyanidation technology cannot efficiently recover the gold in the molybdenum concentrate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Adjust the concentration of molybdenum concentrate pulp to 40%, and use CaO or Ca(OH) 2 The pH is adjusted to 11, the particle size of the molybdenum concentrate is -0.074mm, which is 80% to 85%, the copper content is less than 4%, and the gold grade is 8.2g / t.

[0024] (2) Add sodium lignosulfonate to the above-mentioned molybdenum concentrate pulp, stir for 1 hour, add ammonium sulfate, and sodium cyanide, and stir evenly for cyanamide leaching for 24-48 hours, wherein the amount of sodium lignosulfonate added is 1kg / t molybdenum concentrate, the addition of ammonium sulfate is 10kg / t molybdenum concentrate, the addition of sodium cyanide is 6kg / t molybdenum concentrate;

[0025] (3) After leaching, the pulp is subjected to vacuum filtration to separate solid from liquid, and the solid is washed and further vacuum filtered to obtain molybdenum concentrate that can be sold or enter the smelting process; the liquid is adsorbed by activated carbon and post-processed...

Embodiment 2

[0027] (1) Adjust the concentration of molybdenum concentrate pulp to 40%, and use CaO or Ca(OH) 2 The pH is adjusted to 11, the particle size of the molybdenum concentrate is -0.074mm, which is 80% to 85%, the copper content is less than 4%, and the gold grade is 8.2g / t.

[0028] (2) Add sodium lignosulfonate to the above-mentioned molybdenum concentrate pulp, stir for 1 hour, add ammonium sulfate, and sodium cyanide, stir evenly for cyanamide leaching for 24-48 hours, wherein the amount of sodium lignosulfonate added is 1.5 kg / t molybdenum concentrate, the addition of ammonium sulfate is 10kg / t molybdenum concentrate, and the addition of sodium cyanide is 5kg / t molybdenum concentrate;

[0029] (3) After leaching, the pulp is subjected to vacuum filtration to separate solid from liquid, and the solid is washed and further vacuum filtered to obtain molybdenum concentrate that can be sold or enter the smelting process; the liquid is adsorbed by activated carbon and post-process...

Embodiment 3

[0031] (1) Adjust the concentration of molybdenum concentrate pulp to 35%, and use CaO or Ca(OH) 2 The pH is adjusted to 12, the particle size of the molybdenum concentrate is -0.074mm, which is 80%-85%, the copper content is less than 4%, and the gold grade is 8.6g / t.

[0032] (2) Add sodium lignosulfonate to the above-mentioned molybdenum concentrate pulp, stir for 2 hours, add ammonium nitrate, and sodium cyanide, and stir evenly for cyanamide leaching for 24-48 hours, wherein the amount of sodium lignosulfonate added is 5kg / t molybdenum concentrate, the addition of ammonium nitrate is 6kg / t molybdenum concentrate, the addition of sodium cyanide is 2kg / t molybdenum concentrate;

[0033] (3) After leaching, the pulp is subjected to vacuum filtration to separate solid from liquid, and the solid is washed and further vacuum filtered to obtain molybdenum concentrate that can be sold or enter the smelting process; the liquid is adsorbed by activated carbon and post-processed to...

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Abstract

The invention discloses a method for extracting gold from a gold-containing molybdenum concentrate, which comprises the following steps: (1) adjusting the concentration of the molybdenum concentrate slurry to 35-40%, and the pH at 10-12; Add sodium lignosulfonate to the ore pulp, stir for 0.5-2 hours, add ammonia water and / or ammonium salt, and sodium cyanide, and stir evenly for cyanamide leaching for 24-48 hours; (3) Solid-liquid separation of the pulp after leaching , the solid is washed, filtered and dried to obtain molybdenum concentrate that can be used for sale or enter the smelting process; the liquid is adsorbed by activated carbon and post-processed to recover gold. The method of the invention makes full use of mineral resources and comprehensively recovers valuable metals on the premise that the molybdenum concentrate obtained by flotation basically does not affect its sales.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, and in particular relates to a method for extracting gold from gold-containing molybdenum concentrate. Background technique [0002] In some molybdenum deposits, especially copper-molybdenum deposits, the gold content is very high. During the beneficiation production, some gold will enter the molybdenum concentrate, and the gold content ranges from 4 to 100g / t. Since the molybdenum concentrate obtained from mineral processing is mainly used to smelt ferromolybdenum and molybdenum chemical products, the associated gold in the molybdenum concentrate is not priced. Therefore, the recovery of gold in the molybdenum concentrate can increase the added value of the product and make the resources more reasonable. ground use. [0003] However, the existing all-slime cyanidation technology cannot efficiently recover gold in molybdenum concentrate. Therefore, developing an efficient and economical...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B34/34C22B11/00
Inventor 李晓伟黄怀国林鸿汉谢洪珍钟俊阴菡朱娜叶志勇
Owner 厦门紫金矿冶技术有限公司