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Two-stage acid leaching washing pressure filtration process and device of metal acid leaching solution

A metal acid and leaching technology, applied in the direction of improving process efficiency, can solve the problems of insufficient washing of slag, inability to wash, and easy entry of slag into the flow channel of the filter plate.

Active Publication Date: 2013-11-13
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is that when manganese slag or zinc slag is washed with washing liquid in the prior art, the manganese slag or zinc slag is easily broken under the impact force of the washing liquid, so that the slag is partially not fully washed or even cannot be washed. Moreover, slag is easy to enter the flow channel of the filter plate, resulting in blocking the flow channel of the filter plate; and then a method of metal acid leaching solution that avoids slag breaking during the washing process, thereby avoiding slag blocking the flow channel of the filter plate, and can extract metal to the greatest extent The two-stage acid leaching, washing and pressing filter process, and on this basis, a device used in this process is proposed

Method used

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  • Two-stage acid leaching washing pressure filtration process and device of metal acid leaching solution
  • Two-stage acid leaching washing pressure filtration process and device of metal acid leaching solution
  • Two-stage acid leaching washing pressure filtration process and device of metal acid leaching solution

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Experimental program
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Effect test

Embodiment 1

[0043] (1) Inject the manganese acid leaching solution into the filter chamber of the diaphragm filter press at a pressure of 0.2 MPa to obtain a 4t filter cake, and pre-press the filter cake with a pre-press pressure of 0.2 MPa;

[0044] (2) In the pre-pressed state, inject 1.2t, 10v% sulfuric acid into the filter chamber at a pressure of 0.2MPa to carry out two-stage acid leaching of the filter cake, and the time for the second-stage acid leaching is 5 minutes;

[0045] (3) After the second-stage acid leaching is completed, keep the pre-compressed state, and the water will be 3 The flow rate of / h is constantly injected into the filter cake after washing the second section of acid leaching in the filter chamber, and the washing time is 90min;

[0046] (4) After the washing is completed, the material in the filter chamber is subjected to high-pressure filtration at 0.8 MPa, and the filter residue 1 is obtained by unloading after the completion of the filtration.

Embodiment 2

[0048] (1) Inject the manganese acid leaching solution at a pressure of 0.6MPa and fill the filter chamber of the diaphragm filter press to obtain 5t of filter cake, and pre-press the filter cake with a pre-press pressure of 0.6 MPa;

[0049] (2) In the pre-pressed state, inject 10t, 6v% hydrochloric acid into the filter chamber at a pressure of 0.6MPa to carry out two-stage acid leaching of the filter cake, and the time for the second-stage acid leaching is 120min;

[0050] (3) After the second-stage acid leaching is completed, keep the pre-compressed state, and the water will be 3 The flow rate of / h is constantly injected into the filter cake after washing the second stage acid leaching in the filter chamber, and the washing time is 5min;

[0051] (4) After the washing is completed, the material in the filter chamber is subjected to high-pressure filtration at 1.6 MPa, and the filter residue 2 is obtained by unloading after the completion of the filtration.

Embodiment 3

[0053] (1) Inject the manganese acid leaching solution at a pressure of 0.4MPa and fill the filter chamber of the diaphragm filter press to obtain a 4t filter cake, and pre-press the filter cake with a pre-press pressure of 0.5 MPa;

[0054] (2) In the pre-pressed state, inject a mixture of 0.9t, 10v% phosphoric acid and 0.9t, 6v% hydrofluoric acid into the filter chamber at a pressure of 0.5MPa to perform two-stage acid leaching of the filter cake , the time for the second-stage acid leaching is 100min;

[0055] (3) After the second-stage acid leaching is completed, keep the pre-compressed state, and the water will be 3 The flow rate of / h continuously injects the filter cake after washing the second stage acid leaching in the filter chamber, and the washing time is 60min;

[0056] (4) After the washing is completed, the material in the filter chamber is subjected to high-pressure filtration at 1.3 MPa, and the filter residue 3 is obtained by unloading after the completion o...

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Abstract

The invention discloses a two-stage acid leaching washing pressure filtration process of a metal acid leaching solution. The process comprises the following steps: 1) injecting the metal acid leaching solution into a filter chamber of a membrane filter press under pressure to obtain filter cakes, and pre-pressing the filter cakes under a pre-pressing pressure of 0.2-0.6MPa; 2) injecting acid into the filter chamber to perform two-stage acid leaching on the filter cakes under the pre-pressing state; 3) at the end of the two-stage acid leaching treatment, keeping the pre-pressing state and continuously injecting a washing solution into the filter chamber for washing the filter chamber; and 4) performing high-pressure press filtering on the substance in the filter chamber after the washing treatment is finished, and discharging the filter residues after the press filtering treatment is ended. On the basis of the two-stage acid leaching washing pressure filtration process, the invention also discloses a device for the process. The process and the device are applied to the wet electrolytic industry for extracting metal compounds from ores.

Description

technical field [0001] The invention relates to a process for performing two-stage acid leaching, washing and pressure filtration on metal acid leaching liquid, and a device for realizing the process, which belongs to the technical field of extracting metal compounds from ore or concentrate by wet method. Background technique [0002] Industrially, the wet electrolysis process is an extraction process that can extract copper, lead, gold, silver, manganese, zinc, nickel and other metals from metal ores. Among them, the wet electrolytic extraction of manganese and zinc is the most common. [0003] Manganese steel alloy is hard and tough at normal temperature, soft and easy to process at high temperature, and is widely used in building buildings, bridges and manufacturing weapons. Therefore, manganese metal, which is an important raw material for manganese steel alloy, is also increasing its market demand year by year. The process of wet electrolytic extraction of metal mangan...

Claims

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Application Information

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IPC IPC(8): C22B3/22C22B3/06C22B3/02
CPCY02P10/20
Inventor 潘涔轩刘闺华汝振广窦广玉朱克松
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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