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Method for extracting gold and silver from acid making high-iron cinder and removing impurities

A high-speed rail, gold and silver technology, applied in the direction of improving process efficiency, can solve problems such as failure to obtain effective recovery, and achieve the effect of improving the comprehensive recovery value of resources and the grade quality of products, broad application prospects, and promoting sustainable development.

Active Publication Date: 2015-04-08
SHANDONG GUODA GOLD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main gold extraction method is the direct cyanidation method, which is to directly cyanide the gold concentrate suitable for direct cyanidation treatment with less harmful elements and a higher gold and silver leaching rate to extract gold and silver, and the resulting cyanide tailings, before It has been stockpiled or roasted as a raw material for sulfuric acid plants to make acid, and the sulfur in the tailings has been utilized, but a small amount of valuable metals such as lead, copper, and iron contained in it have not been effectively recovered

Method used

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  • Method for extracting gold and silver from acid making high-iron cinder and removing impurities
  • Method for extracting gold and silver from acid making high-iron cinder and removing impurities
  • Method for extracting gold and silver from acid making high-iron cinder and removing impurities

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Experimental program
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Effect test

Embodiment 1

[0030] 1) Cyanide gold extraction tailings flotation enrichment of high-sulfur ore:

[0031] Cyanide gold extraction tailings refers to the cyanide tailings produced by the direct cyanide gold extraction process, the main components are: gold 1.0g / t, silver 10g / t, sulfur 20%, iron 15%, lead 0.20%, zinc 0.30%; cyanide tailings are added with water to adjust the slurry to control the pulp concentration to 30%; sodium metabisulfite is used as the activator, the dosage is 100g / t, sulfuric acid is used to adjust the pH value of the pulp to 2, and the dosage of the agent: sodium silicate is used as the gangue inhibitor, the dosage 1000g / t; ethyl xanthate as a collector, the dosage is 500g / t, 2# oil is used as a foaming agent, the dosage is 100g / t; Sulfur concentrate with 48% sulfur grade, 2.0g / t gold grade, 18g / t silver grade, 0.15% copper, 0.30% lead, 0.50% zinc,

[0032] 2) Roasting high-sulfur ore to produce acid produces high-iron slag rich in gold and silver:

[0033] Mix the...

Embodiment 2

[0040] 1) Cyanide gold extraction tailings flotation enrichment of high-sulfur ore:

[0041] Cyanide gold extraction tailings refers to the cyanide tailings produced by the direct cyanide gold extraction process, the main components are: gold 1.5g / t, silver 25g / t, sulfur 25%, iron 20%, lead 0.40%, zinc 0.50%; cyanide tailings are added with water to adjust the slurry to control the pulp concentration to 35%; sodium metabisulfite is used as the activator, the dosage is 500g / t, sulfuric acid is used to adjust the pH value of the pulp to 4, and the dosage of the agent: sodium silicate is used as the gangue inhibitor, the dosage 2000g / t; ethyl xanthate as collector, the dosage is 800g / t, 2# oil is used as foaming agent, the dosage is 200g / t; Sulfur concentrate with a sulfur content grade of 49%, gold grade 3.3g / t, silver grade 45g / t, lead 0.50%, zinc 0.80%;

[0042] 2) Roasting high-sulfur ore to produce acid produces high-iron slag rich in gold and silver:

[0043] The sulfur c...

Embodiment 3

[0050] 1) Cyanide gold extraction tailings flotation enrichment of high-sulfur ore:

[0051] Cyanide gold extraction tailings refers to the cyanide tailings produced by the direct cyanide gold extraction process, the main components are: gold 1.3g / t, silver 18g / t, sulfur 23%, iron 17%, lead 0.30%, zinc 0.40%; cyanide tailings are added with water to adjust the slurry to control the pulp concentration to 33%; sodium metabisulfite is used as the activator, the dosage is 300g / t, sulfuric acid is used to adjust the pH value of the pulp to 3, and the dosage of the agent: sodium silicate is used as the gangue inhibitor, the dosage 1500g / t; ethyl xanthate as collector, the dosage is 650g / t, 2# oil is used as foaming agent, the dosage is 150g / t; Sulfur concentrate with a sulfur content grade of 48.50%, gold grade 2.80g / t, silver grade 32.00g / t, lead 0.40%, zinc 0.60%;

[0052] 2) Roasting high-sulfur ore to produce acid produces high-iron slag rich in gold and silver:

[0053] Mix t...

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Abstract

The invention discloses a method for extracting gold and silver from acid making high-iron cinder and removing impurities. The method comprises the following steps of flotation of enriched high-sulfur ore from cyaniding-based gold extraction tailings, high-sulfur ore roasting acid production for gold-sliver-enriched high-iron cinder production, high-strength grinding impurity removal of the gold-sliver-enriched high-iron cinder, cyaniding on the high-iron cinder without impurities for gold and sliver extraction, and two-step high-efficiency dehydration. The method prolongs a product resource integrated utilization chain, improves a resource integrated recovery value and product grade quality, realizes thorough utilization of value resources, and has large economic, environmental protection and social benefits.

Description

technical field [0001] The invention relates to a method for extracting gold and silver from acid-making high-iron slag and removing impurities, and belongs to the technical field of gold smelting and comprehensive recycling of resources. Background technique [0002] The treatment methods of gold concentrate in gold production mainly include direct cyanidation method, roasting cyanidation method, two-stage roasting cyanidation method, bacterial oxidation method, and hot pressing method. The gold harmful pretreatment process effectively eliminates the influence of harmful impurities through the pretreatment process and improves the leaching rate of gold and silver. The main gold extraction method is the direct cyanidation method, which is to directly cyanide the gold concentrate suitable for direct cyanidation treatment with less harmful elements and a higher gold and silver leaching rate to extract gold and silver, and the resulting cyanide tailings, before It has been sto...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B11/08C22B1/02C21B15/00
CPCY02P10/20
Inventor 徐永祥吕寿明梁志伟李腾山
Owner SHANDONG GUODA GOLD
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