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Lead silver residue flotation combined collector and application technology

A combination of collector and lead-silver slag technology, applied in flotation, solid separation, etc., can solve the problems of high cost, difficult mineral dissociation, energy consumption, etc., and achieve low production cost, wide application range and low price cheap effect

Active Publication Date: 2015-08-19
NORTHWEST RES INST OF MINING & METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Wet treatment is characterized by fast leaching speed, high leaching rate, high cost, and serious equipment corrosion
Pyrochemical treatment has high requirements on raw materials, complex process and consumes a lot of energy
Flotation method, because gold and silver in lead-silver slag generally exist in the form of inclusions, it is difficult to achieve complete monomer dissociation of useful minerals, and the use of a single flotation method often has the problem of low recovery rate

Method used

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  • Lead silver residue flotation combined collector and application technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. Sulfuric acid heating pretreatment of lead and silver slag: take lead and silver slag, which contains 145g / t of silver, 1.32g / t of gold, and 7.85g / t of zinc, stir and soak with the waste electrolyte produced by zinc hydrometallurgy, and add Concentrated sulfuric acid with a wt% of 98, an acidity of 150g / L, a liquid-solid ratio of 3:1, a temperature of 90°C, and a reaction time of 1.5h to separate solubles and residual residues, and the supernatant is purified and returned to the zinc hydrometallurgy system;

[0023] 2. Grinding process: Grinding the residual slag, the grinding fineness is 0.038mm, the grinding concentration is 55%, and the content accounts for 89.5%. During grinding, inhibitors are added to the ball mill, and the raw materials of the following weight components are: Made: 4 parts of sodium sulfide; 1 part of calcium oxide; 0.5 part of water glass, 2000g / t;

[0024] 3. Flotation pulp: the concentration of the flotation pulp obtained through the above...

Embodiment 2

[0027] 1. Sulfuric acid heating pretreatment of lead and silver slag: take lead and silver slag, which contains 291g / t of silver, 1.43g / t of gold, and 6.74% of zinc in the lead-containing silver slag, stir and soak with clear water as a solvent, and add 93wt% of Concentrated sulfuric acid with an acidity of 200g / L, a liquid-solid ratio of 4:1, a temperature of 95°C, and a reaction time of 2.5 hours to separate soluble matter and residual residue, and the supernatant is purified and returned to the zinc hydrometallurgy system;

[0028] 2. Grinding process: Grinding the residual slag, the grinding fineness is 0.038mm, the grinding concentration is 58%, and the content accounts for 91.4%. During grinding, inhibitors are added to the ball mill, and the raw materials of the following weight components are: Made: 6 parts of sodium sulfide; 2 parts of calcium oxide; 0.5 part of water glass, 4000g / t;

[0029] 3. Flotation pulp: the concentration of the flotation pulp obtained through ...

Embodiment 3

[0032] 1. Pretreatment of lead and silver slag with sulfuric acid heating: take lead and silver slag, which contains 178g / t of silver, 1.67g / t of gold, and 7.24% of zinc, stir and soak with the waste electrolyte produced by zinc hydrometallurgy, and add wt% 93 concentrated sulfuric acid with an acidity of 180g / L, a liquid-solid ratio of 2:1, a temperature of 90°C, and a reaction time of 4 hours to separate soluble matter and residual residue, and the supernatant is purified and returned to the zinc hydrometallurgy system;

[0033] 2. Grinding process: Grinding the residual slag, the grinding fineness is 0.038mm, the grinding concentration is 55%, and the content accounts for 90.5%. During grinding, inhibitors are added to the ball mill, and the raw materials of the following weight components are: Made: 5 parts of sodium sulfide; 2 parts of calcium oxide; 1 part of water glass, 2000g / t;

[0034] 3. Flotation pulp: the concentration of the flotation pulp obtained through the ab...

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Abstract

The invention discloses a lead silver residue flotation combined collector and belongs to the technical field of mineral processing and wet metallurgy. The lead silver residue flotation combined collector is formed by the following parts, 4 to 8 parts of ammonium dibutyl dithiophosphate, 0.5 to 1 part of 25# black powder and 0.5 to 1 part of 2# oil. An application technology comprises the following steps of enabling electrolyte generated from clean water or zinc hydrometallurgy to serve as solvent and warming and pre-processing lead silver residues after sulfuric acid is added; returning to a zinc hydrometallurgy system to recycle zinc after supernate is purified, recycling silver through flotation after the residues are performed on ore grinding and meanwhile enabling gold and zinc to be collected in solver concentrate. The lead silver residue flotation combined collector is simple in composition, low in cost and has a collecting and foaming function and an advanced concentrated effect, achieves cyclic utilization due to the fact that the waste electrolyte serves as the solvent, is low in production cost, high in recovery rate, strong in adaptability, wide in application range and friendly to the environment and achieves recycle of various valuable elements.

Description

technical field [0001] The invention belongs to the technical field of mineral processing and hydrometallurgy, in particular to a lead-silver slag flotation combined collector and its application process. Background technique [0002] About 80% of the zinc in the world is produced by wet method. On average, millions of tons of zinc leaching slag are produced in my country every year. The slag contains copper, lead, zinc and other metal elements and valuable silver, gold, cadmium, indium, etc. rare metals. The long-term stockpiling of such slag not only takes up a large amount of cultivated land, pollutes the environment, but also causes a great waste of resources. Since most of the lead and silver are concentrated in the zinc leaching slag after wet leaching, the slag is also called lead-silver slag. With the increasing scarcity of resources and the increasing consumption of metals, the recovery of valuable metals from lead and silver slag has become an important research t...

Claims

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Application Information

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IPC IPC(8): B03D1/014B03D1/008B03B1/04B03D1/002B03D101/02B03D101/06
Inventor 廖雪珍李国栋彭建城胡保栓孙运礼杨俊龙刘宝山巩明辉郭艳华
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
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