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A method for reducing the moisture content of silver flotation second-stage press filter residue

A technology of press filter residue and flotation, which is applied in flotation, solid separation, process efficiency improvement, etc. It can solve the problems of small pressing area of ​​diaphragm plate, unfavorable recovery of water-soluble zinc, and high moisture content of slag, so as to speed up water volatilization, reduce Equipment maintenance difficulty, effect of reducing moisture content

Active Publication Date: 2016-04-06
南丹县南方有色金属有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a method for reducing the water content of silver flotation second-stage press filter residue, which solves the problem of complex operation process of traditional silver flotation process, high moisture content of obtained slag, long pressing cycle, small pressing area of ​​diaphragm plate, easy blockage, and equipment failure. The maintenance is complicated, which is not conducive to the recovery of water-soluble zinc in the original pulp, etc.

Method used

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  • A method for reducing the moisture content of silver flotation second-stage press filter residue
  • A method for reducing the moisture content of silver flotation second-stage press filter residue

Examples

Experimental program
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Embodiment 1

[0011] Example 1: A zinc hydrometallurgy company processes 200t of zinc concentrate on average per day, and performs two-stage pressure filtration on the acid leaching slag slurry after zinc smelting for silver flotation. Press filter process such as figure 2 As shown, the process features are as follows:

[0012] ① Use high-temperature steam to heat the acid leaching slag pulp for 1 hour to obtain a uniform temperature pulp.

[0013] ②Introduce the heated acid leaching slag slurry to a volume of 10m 2 In the inner cavity of the filter press, close the feed valve of the filter press after the inner cavity of the filter press is filled with pulp.

[0014] ③Using three units with a gas volume of 20m 3 The compressed air blower blows the slurry, and the blowing time is 30 minutes.

[0015] ④ After the injection is completed, close the valve of the compressor fan, and return the machine to unload the slag.

[0016] The ore pulp after the second-stage pressure filtration was ...

Embodiment 2

[0017] Example 2: A zinc hydrometallurgy company handles 800t of zinc concentrate per day, and performs two-stage pressure filtration on the acid leaching slag slurry after zinc smelting for silver flotation. Adopt the technological process identical with embodiment 1, this technological feature is as follows:

[0018] ① Use high-temperature steam to heat the acid leaching slag pulp for 1 hour to obtain a uniform temperature pulp.

[0019] ②Introduce the heated acid leaching slag slurry to a volume of 16m 2 In the inner cavity of the filter press, close the feed valve of the filter press after the inner cavity of the filter press is filled with pulp.

[0020] ③Using three sets of gas volume are 25m 3 The compressed air blower blows the slurry, and the blowing time is 30 minutes.

[0021] ④ After the injection is completed, close the valve of the compressor fan, and return the machine to unload the slag.

[0022] The ore pulp after the second-stage pressure filtration was t...

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Abstract

The invention discloses a method for reducing moisture of silver flotation two-stage pressure filter residues. The method includes steps that zinc smelting acid leaching residue ore pulp is subjected to high-temperature steam heating so that ore pulp temperature is increased to accelerate moisture volatilization speed of mineral waste residues, then the ore pulp is guided into a chamber type filter press, after the chamber type filter press is filled with materials, an ore pulp feeding valve is closed, compressed wind valves are opened to blow the ore pulp, the compressed wind valves are closed after pressing is finished, and finally, compressing fans retreat to discharge the residues. High-temperature steam is used for heating the mineral waste residues and compressed wind pressing is used in the pressing process so that the moisture content of the pressed mineral waste residues can be effectively reduced, moreover, the ore pulp feeding valve of the filter press is a mechanical valve, the mechanical valve is high in reliability, and maintaining and troubleshooting of devices are convenient.

Description

technical field [0001] The invention relates to a method for reducing the water content of the second-stage press filter residue in the silver flotation slag pretreatment process. Background technique [0002] Silver flotation refers to pulping the acid leaching slag produced in the process of zinc smelting, adding sulfide collector butyl ammonium black medicine to it, and stirring and aerating the compressed air through the flotation column to make the pulp form a large amount of sulfidized slag. Bubbles acted by collectors, hydrophobic silver sulfide and other sulfide ore particles will attach to the bubbles and float up with the bubbles, thus enriching on the surface of the flotation ore pulp, thus forming a mineralized foam layer, and from The top surface of the flotation is overflowed to obtain the concentrate, so as to achieve the purpose of enriching silver from the zinc leaching slag. At present, in order to fully recover the water-soluble zinc in the acid leaching ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B11/00B03D1/02
CPCY02P10/20
Inventor 周南方覃国辉罗鹏志王智
Owner 南丹县南方有色金属有限责任公司
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