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Process for reclaiming gold and silver by floatation from acid leaching ore pulp in wet zinc smelting

A technology of hydrometallurgy and ore pulp, which is applied in flotation, solid separation, etc., can solve the problems of waste of valuable resources and achieve the effects of maintaining concentration, reliable collection, and ensuring flotation effect

Inactive Publication Date: 2010-09-15
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The zinc concentrate is leached directly after roasting, and the zinc is recovered from the leaching solution. After the pulp is concentrated and dried, the zinc is further recovered through the volatilization kiln, and the leaching slag is discharged. The gold and silver contained in it also enter the leaching slag without being recovered. This results in a waste of valuable resources

Method used

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  • Process for reclaiming gold and silver by floatation from acid leaching ore pulp in wet zinc smelting
  • Process for reclaiming gold and silver by floatation from acid leaching ore pulp in wet zinc smelting
  • Process for reclaiming gold and silver by floatation from acid leaching ore pulp in wet zinc smelting

Examples

Experimental program
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Effect test

Embodiment 1

[0024] A zinc hydrometallurgy company handles 600t of zinc concentrate calcine per day, and the pH of the pulp after acid leaching is 3-4, and the pulp is directly flotation for gold and silver.

[0025] Flotation process such as image 3 As shown, the process features are:

[0026] ① Lead out the pulp after acid leaching of zinc concentrate calcine and send it into the pulp mixing tank, add an appropriate amount of zinc oxide regulator to the pulp, adjust the pH value of the pulp to 4-5, and then add capture to the pulp The collector is mixed with butyl xanthate and butylamine black drug, and the two components are mixed at a ratio of 1:1. The amount of collector is 200g / t; the foaming agent is 2# oil, the dosage is 60g / t;

[0027] ② Send the pulp in the mixing tank to the flotation system;

[0028] ③ In the flotation system, the new technology of point distribution and dosing is adopted, that is: in addition to the roughing process, the processes of fine one, fine two, fi...

Embodiment 2

[0033] A zinc industry company, with an annual output of 150,000 tons of zinc metal hydrometallurgy process, the acid leaching pulp pH is 3 to 4, and the flotation recovery of gold and silver is carried out.

example 1

[0034] Flotation process flow is the same as example 1, and the process features are:

[0035] ① Lead out the ore pulp after acid leaching of zinc concentrate calcine and send it into the pulp mixing tank, add collector and foaming agent to the pulp, and stir fully. The collector is sodium methyl isobutyl xanthate and No. 25 black drug composite collector, the two components are mixed at a ratio of 1:0.6, the total amount of collector is 240g / t; the foaming agent is ether alcohol, and the total amount is 60g / t;

[0036] ② Send the pulp in the mixing tank to the flotation system;

[0037] ③ In the flotation system, the new technology of point distribution and dosing is adopted, that is: in addition to the roughing process, the processes of fine one, fine two, fine three, sweep one, sweep two and sweep three in the flotation process are respectively Add composite collector and foaming agent, the amount of collector is 20g / t, 10g / t, 10g / t, 30g / t, 20g / t and 10g / t; the amount of f...

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Abstract

The invention discloses a process for reclaiming gold and silver by floatation from acid leaching ore pulp in wet zinc smelting. The process reclaims the gold and the silver by floatation from the ore pulp after zinc concentrate calcined sand is leached by acid by using a known floatation system under the condition of keeping the primary zinc leaching system. The process comprises the following steps of: extracting the ore pulp after the zinc concentrate calcined sand is leached by acid, adding a collecting agent and a foaming agent for dressing sulfide ores into the ore pulp, fully stirring the ore pulp, then delivering the ore pulp to the flotation system, and adding the collecting agent and the foaming agent into the ore pulp in a flotation tank of each flotation process after the rough flotation process of the flotation system again so as to realize flotation reclamation of the gold and the silver in the ore pulp. The process efficiently reclaims the gold and the silver without affecting the normal operation of a main zinc system, realizes comprehensive utilization of resources, and brings great economic benefit to enterprises.

Description

technical field [0001] The invention relates to a gold and silver flotation process for recovering gold and silver from the acid leaching slurry in zinc hydrometallurgy, namely: a flotation process for recovering precious metal gold and silver from the pulp produced by acid leaching of zinc concentrate calcined sand in the process of zinc hydrometallurgy. Choose craft. Background technique [0002] Zinc hydrometallurgy is the most important zinc smelting method in the world today, and its output accounts for more than 85% of the world's total zinc production. Recently, the new and expanded zinc production capacity in the world adopts the hydrometallurgy process. The process flow of hydrometallurgy zinc technology is as follows: figure 1 shown. The zinc concentrate is leached directly after roasting, and the zinc is recovered from the leaching solution. After the pulp is concentrated and dried, the zinc is further recovered through a volatilization kiln, and the leaching s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/001B03D101/02
Inventor 黄万抚李新冬刘年兰
Owner JIANGXI UNIV OF SCI & TECH
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