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Method for separating and purifying lead, zinc, cadmium and copper based on ammonium complex system

A lead-zinc, system technology is applied in the separation and purification of lead-zinc-cadmium-copper, and the separation and purification of lead-zinc-cadmium-copper based on ammonium complex system, which can solve the problems of high cost of impurity removal, less than 60% of zinc utilization rate, etc. The effect of reducing production costs

Pending Publication Date: 2020-06-16
GREENNOVO ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The obtained copper, cadmium and lead are similar, and at the same time, the utilization rate of zinc is less than 60% during the removal of impurities by zinc powder, resulting in high removal costs

Method used

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  • Method for separating and purifying lead, zinc, cadmium and copper based on ammonium complex system

Examples

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Embodiment 1

[0043] This embodiment provides a method for the separation and purification of lead, zinc, cadmium, and copper based on the ammonium complex system, and its technological process is as follows: figure 1 As shown, the method includes the following steps:

[0044] (1) Use leaching solution to leaching zinc-containing raw materials, containing ammonia in the leaching solution, the pH of the leaching solution is 7, to obtain the leaching liquid, the zinc content in the leaching liquid is 70g / L, the zinc raw material is in the leaching stage, the liquid-solid mass ratio is 12:1;

[0045] (2) Carry out plate and frame filter press treatment to the leached liquid obtained in step (1), said plate and frame press filter comprises a first plate and frame press filter and a second plate and frame press filter, and said first plate and frame press filter obtains The filtrate enters step (3), and the obtained filter residue is subjected to residue washing and second plate and frame press...

Embodiment 2

[0050] This embodiment provides a method for the separation and purification of lead, zinc, cadmium, and copper based on the ammonium complex system, and its technological process is as follows: figure 1 As shown, the method includes the following steps:

[0051] (1) Use leaching solution to leaching zinc-containing raw materials, containing ammonia in the leaching solution, the pH of the leaching solution is 6.5, to obtain the leaching liquid, the zinc content in the leaching liquid is 65g / L, the zinc raw material is in the leaching stage, the liquid-solid mass ratio is 13:1;

[0052] (2) Carry out plate and frame filter press treatment to the leached liquid obtained in step (1), said plate and frame press filter comprises a first plate and frame press filter and a second plate and frame press filter, and said first plate and frame press filter obtains The filtrate enters step (3), and the obtained filter residue is subjected to residue washing and second plate and frame pre...

Embodiment 3

[0057] This embodiment provides a method for the separation and purification of lead, zinc, cadmium, and copper based on the ammonium complex system, and its technological process is as follows: figure 1 As shown, the method includes the following steps:

[0058] (1) Use leaching solution to leaching zinc-containing raw materials, containing ammonia in the leaching solution, the pH of the leaching solution is 7.5, to obtain the leaching liquid, the zinc content in the leaching liquid is 60g / L, the zinc raw material is in the leaching stage, the liquid-solid mass ratio is 15:1;

[0059] (2) Carry out plate and frame filter press treatment to the leached liquid obtained in step (1), said plate and frame press filter comprises a first plate and frame press filter and a second plate and frame press filter, and said first plate and frame press filter obtains The filtrate enters step (3), and the obtained filter residue is subjected to residue washing and second plate and frame pre...

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Abstract

The invention provides a method for separating and purifying lead, zinc, cadmium and copper based on an ammonium complex system. The method comprises the following steps of (1) leaching zinc-containing raw materials with a leaching solution to obtain a leached solution; (2) filtering the leached solution obtained in the step (1) to obtain filtrate and filter residue; (3) mixing the filtrate obtained in step (2) with metal lead to replace copper, and performing solid-liquid separation to obtain a first separation liquid; mixing the first separation liquid with metal cadmium to replace lead, andperforming solid-liquid separation to obtain a second separation liquid; mixing the second separation liquid with metal zinc to replace cadmium, and performing solid-liquid separation to obtain a third separation liquid; and (4) electrolyzing the obtained third separation liquid obtained in the step (3) to obtain metal zinc, and returning the electrolytic solution after electrolysis to the step (1) to leach the zinc-containing raw materials. In the method, self-produced lead and cadmium are used to realize self-production and self-use and reduce production costs

Description

technical field [0001] The invention belongs to the field of electrolytic zinc production, and relates to a method for separating and purifying lead, zinc, cadmium and copper, in particular to a method for separating and purifying lead, zinc, cadmium and copper based on an ammonium complex system. Background technique [0002] At present, about 80% of zinc in the world is extracted through wet process, and the purification of zinc leaching solution is one of the key processes of the whole process. Impurities such as copper, lead, and cadmium in the leaching solution not only have great harm to the quality of the electrodeposition product cathode zinc, but also reduce the current efficiency and increase energy consumption. Therefore, it is very important to effectively purify the leaching solution before electrodeposition. . [0003] CN 107385472 A discloses a production method of electrolytic zinc, wherein the purification process is divided into one-stage purification, two...

Claims

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Application Information

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IPC IPC(8): C22B3/46C22B3/14C22B3/22C22B19/20C22B15/00C22B13/00C22B17/00C25C1/16
CPCC22B3/46C22B3/14C22B3/22C22B19/24C22B19/26C22B15/0078C22B15/0091C22B13/04C22B17/04C25C1/16Y02P10/20C25C1/12
Inventor 罗彦马黎阳冯国军张武陈锐马青龙
Owner GREENNOVO ENVIRONMENTAL TECH CO LTD