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Multi-section acid leaching, washing and pressure filtration metal extraction process and integrated device thereof

A technology of metal extraction and acid leaching, which is applied in the direction of improving process efficiency and can solve problems such as insufficient washing of slag, broken slag filter cake, and inability to wash

Active Publication Date: 2013-10-09
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] A technical problem to be solved by the present invention is that in the prior art, when the slag is washed with washing liquid, the slag filter cake 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, and the slag easily enters the flow channel of the filter plate , resulting in blockage of the filter plate flow channel; and then propose a metal extraction process that avoids the slag filter cake from breaking during the washing process, thereby avoiding the blockage of the filter plate flow channel, and can extract metals to the greatest extent.

Method used

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  • Multi-section acid leaching, washing and pressure filtration metal extraction process and integrated device thereof
  • Multi-section acid leaching, washing and pressure filtration metal extraction process and integrated device thereof
  • Multi-section acid leaching, washing and pressure filtration metal extraction process and integrated device thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0046] The multi-stage acid leaching, washing and pressure filtration process described in this embodiment comprises the following steps,

[0047] (1) Inject the manganese acid leaching solution obtained by a section of acid leaching into the filter chamber of the diaphragm filter press at a pressure of 0.2 MPa, and the filtrate flows out along the filtrate channel to obtain a 5t filter cake, and pre-press the filter cake with a pre-pressing pressure of 0.2 MPa;

[0048] (2) In the pre-pressed state, inject 1.5t, 7v% 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;

[0049] (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 continuously injected into the filter chamber for a period of washing, and the period of washing for a period of time is 120min;

[0050] (4) A...

Embodiment 2

[0054] The multi-stage acid leaching, washing and pressure filtration process described in this embodiment comprises the following steps,

[0055] (1) Inject the manganese acid leaching solution obtained by a section of acid leaching into the filter chamber of the diaphragm filter press at a pressure of 0.6 MPa, and the filtrate flows out along the filtrate channel to obtain a 4t filter cake, and the filter cake is pre-pressed, and the pre-pressing pressure is 0.6 MPa;

[0056] (2) In the pre-pressed state, inject 8t of 70°C hydrochloric acid with a concentration of 6v% into the filter chamber at a pressure of 0.6MPa to perform two-stage acid leaching on the filter cake, and the time for the second-stage acid leaching is 120min ;

[0057] (3) After the second-stage acid leaching is completed, keep the pre-compressed state, and water at 70°C with a pressure of 0.6MPa and a pressure of 20m 3 The flow rate of / h is continuously injected into the filter chamber for a period of w...

Embodiment 3

[0062] The multi-stage acid leaching, washing and pressure filtration process described in this embodiment comprises the following steps,

[0063] (1) Fill the manganese acid leaching solution obtained by a section of acid leaching into the filter chamber of the diaphragm filter press at a pressure of 0.5 MPa, and the filtrate flows out along the filtrate channel to obtain a 5t filter cake, and pre-press the filter cake, and the pre-compression pressure 0.4MPa;

[0064] (2) In the pre-pressed state, inject 5t of phosphoric acid at 50°C with a concentration of 5v% into the filter chamber at a pressure of 0.4MPa to perform two-stage acid leaching on the filter cake, and the time for the second-stage acid leaching is 100min ;

[0065] (3) After the second-stage acid leaching is completed, keep the pre-compressed state, and water at 50°C with a pressure of 0.5MPa and a pressure of 15m 3 The flow rate of / h is continuously injected into the filter chamber for a period of washing,...

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Abstract

The invention discloses a multi-section acid leaching, washing and pressure filtration metal extraction process. The multi-section acid leaching, washing and pressure filtration metal extraction process comprises the following steps of: pressurizing and injecting a metal acid leaching solution into a filter chamber of a diaphragm filter press to get a filter cake, and pre-pressing the filter cake at 0.2MPa-0.6MPa; performing two-section acid leaching on the filter cake by two-section acid under a pre-pressed state; continuously washing the filter cake subjected to acid leaching by a one-section washing solution under the pre-pressed state; introducing gas below 70 DEG C to one side of the washed filter cake for gas blowing under the pre-pressed state; introducing gas into a material inlet channel for back blowing under the pre-pressed state after the gas blowing is ended; and performing high-pressure pressure filtration on substances in the filter chamber after the back blowing is ended, and unloading slag. On the basis, the invention further discloses a device for the process. The process and the device are used for extracting metal compounds from ore in a wet electrolytic industry.

Description

technical field [0001] The invention relates to a process for extracting metals by performing multi-stage acid leaching, washing and pressure filtration on metal ores, and an integrated device for realizing the process, and belongs to the technical field of extracting metal compounds from ores or concentrates by wet method. Background technique [0002] 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, manganese steel alloy is hard and tough at room temperature, soft and easy to process at high temperature, and can be used to build buildings, bridges and manufacture weapons. Therefore, the demand for manganese metal, which is an important raw material for manganese steel alloy, is increasing year by year; metal zinc is mainly used in In the fields of electroplating, alloy manufacturing and dry batteries, industrial demand is also great. At present, in industria...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/02C22B3/06C22B3/22
CPCY02P10/20
Inventor 潘涔轩汝振广刘闺华朱克松窦广玉
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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