Oxygen-sulfur paragenesis zinc mine flotation method

A zinc ore, oxygen-sulfur technology, applied in flotation, solid separation and other directions, can solve the problems of high production cost, waste of resources, low recovery rate of zinc oxide flotation, etc., to solve high cost, save cost, and improve resource integration The effect of utilization

Inactive Publication Date: 2008-03-19
GUANGXI UNIV
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

For raw ore with a zinc grade of 2-3% and an oxidation rate of 10-30%, the method of recovering zinc sulfide and zinc oxide step by step is adopted. Due to the relatively large amount of sodium sulfide, the flotation recovery rate of zinc oxide is low and the production cost Therefore, many enterprises generally only recycle the zinc sulfide part of this ore, and do not recycle zinc oxide, which inevitably causes a waste of resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1. Mineral raw materials: a mixed ore with a raw ore zinc grade of 5.4% and an oxidation rate of 60% in a concentrator in Guizhou.

[0022] 2. Flotation process: 1 roughing, 3 fine selections, 4 sweeps.

[0023] 3. Chemical system: sodium hexametaphosphate 200g / t, sodium sulfide 5kg / t, octadecyl ammonium acetate 250g / t, kerosene 100g / t, No. 2 oil 70g / t.

[0024] When in use, it is first formulated into the following concentrations (% by weight):

[0025] Sodium hexametaphosphate 5% aqueous solution

[0026] Sodium sulfide 20% aqueous solution

[0027] Ammonium Octadecyl Acetate 20% Emulsion

[0028] Kerosene direct dope addition

[0029] No. 2 oil, direct stock solution addition

[0030] 4. Flotation index: Zinc recovery rate reaches 86%, concentrate grade is 39.8%, tailings zinc content is 0.55%, among which zinc sulfide part reaches 90%.

Embodiment 2

[0032] 1. Mineral raw materials: a mixed ore with a zinc grade of 1.7% and an oxidation rate of 20% in a dressing plant in Hunan.

[0033] 2. Flotation process: 1 time of rough selection, 3 times of fine selection, 4 times of sweeping.

[0034] 3. Chemical system: first use 3kg / t sodium sulfide to mix the pulp, then add 200g / t octadecyl amine acetate, 100g / t kerosene, and 60g / t No. 2 oil.

[0035] When in use, it is first formulated to the following concentrations (% by weight):

[0036] Sodium hexametaphosphate 1% aqueous solution

[0037] Sodium sulfide 10% aqueous solution

[0038] Ammonium Octadecyl Acetate 5% Emulsion

[0039] Kerosene direct dope addition

[0040] No. 2 oil, direct stock solution addition

[0041] 4. Flotation index: Zinc recovery rate reaches 91%, concentrate grade is 51.25%, tailings zinc content is 0.14%.

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Abstract

An oxygen sulfur symbiosis zinc mine flotation method uses sodium hexametaphosphate as a dispersant, sodium sulfide as an activator, octadecyl acetic acid amine and kerosene as collectors and No.2 oil as foaming agent. During the flotation, ores are grinded into mineral monomers for dissociation. Then, the sodium hexametaphosphate is added in a stirring barrel firstly, the sodium sulfide is added for activation and octadecyl acetic acid amine, the kerosene and the No.2 oil are added for collection. With the present invention adopted, the flotation and the recovery of oxide zinc and sulfide zinc can be realized at the same time. The process is shortened. The equipment investment is saved and the production cost is lowered. The total recovery rate of the zinc can reach to 85-90 percentage, and the zinc concentrate grade can reach to 39-52 percentage.

Description

1. Technical field [0001] The invention relates to a mineral flotation method, in particular to a flotation method for oxygen-sulfur symbiotic zinc ore. 2. Background technology [0002] At present, the flotation of zinc sulfide at home and abroad generally uses copper sulfate to activate first, and then adds xanthate for flotation. The flotation recovery rate of zinc sulfide is between 85% and 90%. However, the flotation of zinc oxide is completely different from that of zinc sulfide. Because the surface of zinc oxide is not easy to vulcanize, it is difficult to realize the flotation of zinc oxide by conventional xanthate sulfide method. Although the vulcanization of zinc oxide surface can be accelerated by heating vulcanization method, The process is unstable in practice and has not been widely used. In the 1950s, the Frenchman Ray invented the sulfide amine method for flotation of zinc oxide. The method is to add a large amount of sodium sulfide (7-10kg / t) and then add a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/004B03B1/04B03D101/02B03D101/04B03D103/02
Inventor 陈建华李玉琼魏宗武穆枭陈晔
Owner GUANGXI UNIV
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