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Method for efficiently purifying lixivium obtained after lead matte pressure acid leaching

A lead matte and leaching solution technology, which is applied to the improvement of process efficiency, photography technology, instruments, etc., can solve the problems that the fine particles of ore slurry are difficult to coagulate, affect the quality of cathode copper products, and the fine particles are easy to block the filter holes, etc., and achieve improvement. Filtration performance, significant economic benefits, and easy operation

Inactive Publication Date: 2017-10-24
CHENZHOU CITY JINGUI SILVER IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main reason is: on the one hand, due to the continuous movement of soluble impurities such as iron, arsenic, fluorine, silicon, etc. in the pulp, it is difficult for the fine particles in the pulp to coagulate and settle. ; On the other hand, due to the presence of silicon and iron, it is easy to form colloids in the process of pressure filtration, which makes pressure filtration difficult
In addition, due to the high impurity elements such as iron, arsenic and silicon in the electrolyte, the current efficiency of the swirl electrowinning is only 83.5%, which also greatly affects the quality of the cathode copper product and the purity of the cathode copper product. Only 99.5% can only be sold at the price of blister copper, which has caused economic losses to the enterprise to a certain extent

Method used

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  • Method for efficiently purifying lixivium obtained after lead matte pressure acid leaching

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] see figure 1 , which is a process flow diagram of a method for efficiently purifying leachate after pressure acid leaching of lead matte according to an embodiment of the present invention.

[0025] After the lead matte is subjected to pressure acid leaching, the pulp (that is, the leaching solution after pressure acid leaching of lead matte) is discharged into the middle tank at 90°C, and the volume of the pulp is about 20m 3 , add calcium oxide into the middle tank, adjust the end point pH of the leaching solution to 2.0, stir for 0.5 hours, press filter while it is hot, and use two 100m 2 The chamber filter press is used for pressure filtration, and the pressing can be completed in 2 to 2.5 hours to obtain copper-containing leaching solution and leaching residue. The leaching residue has a water content of 31.6%. It can be seen that the working efficiency of the filter press is increased by more than 75%, and the water content of the slag is reduced by 40%. %above. ...

Embodiment 2

[0028] see figure 1 , which is a process flow diagram of a method for efficiently purifying leachate after pressure acid leaching of lead matte according to an embodiment of the present invention.

[0029] After the lead matte is subjected to pressure acid leaching, the pulp (i.e. the leaching solution after pressure acid leaching of lead matte) is discharged into the middle tank at 100°C, and the volume of the pulp is about 20m 3 , add calcium oxide to the middle tank, adjust the pH to 2.5, stir for 0.9 hours, press filter while it is hot, and use two 100m 2 The chamber filter press can be used for pressure filtration, and the pressing can be completed within 2 hours, and the copper-containing leaching solution and leaching residue can be obtained. The leaching residue contains 30.7% water, so it can be seen that the working efficiency of the filter press has increased by more than 80%, and the water content of the slag has decreased by more than 40%. . The impurity element...

Embodiment 3

[0032] see figure 1 , which is a process flow diagram of a method for efficiently purifying leachate after pressure acid leaching of lead matte according to an embodiment of the present invention.

[0033] After the lead matte is subjected to pressure acid leaching, the pulp (that is, the leaching solution after pressure acid leaching of lead matte) is discharged into the middle tank at 60°C, and the volume of the pulp is about 20m 3 , add calcium hydroxide to the middle tank, adjust the final pH of the leaching solution to 1.5, stir for 2 hours, press filter while it is hot, and use two 100m 2 The chamber filter press is used for pressure filtration, and the pressing can be completed in 2 to 2.5 hours to obtain copper-containing leaching solution and leaching residue. The leaching residue has a water content of 31.2%. It can be seen that the working efficiency of the filter press is increased by more than 75%, and the water content of the slag is reduced by 40%. %above. The...

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Abstract

The invention discloses a method for efficiently purifying lixivium obtained after lead matte pressure acid leaching. The method includes the following steps that (1) an impurity removal reagent A is added into the lixivium obtained after lead matte pressure acid leaching for neutralized purification, solid-liquid separation is carried out to obtain copper-contained lixivium and leaching residues; and (2) the copper-contained lixivium is subject to rotational flow electrolysis, a cathode copper product is obtained, and the leaching residues are subject to the washing process for further recycling soluble copper. By means of the method, the filtering performance of the lixivium obtained after lead matte pressure acid leaching can be effectively improved, and the filtering efficiency is improved by more than 75%; and the rotational flow current efficiency can be improved, the quality of the cathode copper product is improved, the rotational flow current efficiency is improved from 83.5% to more than 91.22%, and the quality of the cathode copper product is improved from 99.5% to more than 99.95%. The method has the beneficial effects of being simple, efficient, convenient to operate, fewer in reagent consumption, low in operation cost, high in practicability, remarkable in economical benefit and the like.

Description

technical field [0001] The invention relates to the technical field of nonferrous metal metallurgical wet methods, in particular to a method for efficiently purifying leachate after pressure acid leaching of lead matte. Background technique [0002] Lead matte is a by-product mainly containing copper and lead-sulfur compounds produced during the smelting of lead concentrates in bottom-blown furnaces, side-blown furnaces and blast furnaces. In addition, lead dross (copper dross) reverberatory furnace Lead matte is a by-product, which is enriched with copper in lead concentrate and contains part of lead, silver and arsenic, which is an important raw material for copper recovery. Due to the complex composition of the raw material, it contains iron, silicon, arsenic, fluorine and other impurity elements that affect the performance of the filter press. The ore slurry obtained by a company after pressure acid leaching (ie, the leachate after pressure acid leaching of lead matte) ...

Claims

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Application Information

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IPC IPC(8): C22B15/00C22B7/00C25C1/12
CPCC22B7/006C22B15/0089C25C1/12Y02P10/20
Inventor 蒋朝金谢兆凤黄前军蒋兆慧谭霖覃小龙
Owner CHENZHOU CITY JINGUI SILVER IND CO LTD