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Method for deeply cleaning and removing cobalt by wet hydrometallurgy

A technology of hydrometallurgy and deep purification, which is applied in the direction of improving process efficiency, can solve the problems of increasing the cost of auxiliary materials and electricity consumption, the inability of the production system to run for a long time, and affecting the electrolytic efficiency of the zinc system, so as to solve the problems of cobalt complexation solution problem, easy industrial implementation, and excellent cobalt removal efficiency

Active Publication Date: 2017-06-27
HENAN YUGUANG ZINC IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the manganese content in this patent is as high as more than 90%, which will directly cause a large amount of manganese ions to enter the solution of the zinc system. The production system cannot be operated for a long time, which will affect the electrolytic efficiency of the zinc system and increase the cost of auxiliary materials and electricity consumption of the enterprise.

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  • Method for deeply cleaning and removing cobalt by wet hydrometallurgy

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Effect test

Embodiment 1

[0026] Embodiment 1, a method for deep purification and removal of cobalt in zinc hydrometallurgy, comprising the following steps:

[0027] Step 1), put the neutral leach supernatant containing 148 g / l of zinc and 0.035 g / l of cobalt leached from zinc calcined sand into the first-stage purification tank, and control the temperature of the first-stage purification to 55°C, according to the total amount of copper and cadmium The amount of zinc powder is calculated as 2 times of the content. Add zinc powder, react for 1h, and filter through a filter press to obtain a section of copper cadmium slag and a filtered liquid. The Cu in the filtered liquid is 0.001g / l, and the Cd is 0.02g / l. l;

[0028] Step 2), heat up the filtered liquid in step 2 to 85-90°C and place it in the second-stage purification tank, and then pass through the second-stage purification 1# tank, the second-stage purification 2# tank, the second-stage purification 3# tank, Add zinc powder and antimony salt to t...

Embodiment 2

[0030] Embodiment 2, a method for deep purification and removal of cobalt in zinc hydrometallurgy, comprising the following steps:

[0031] Step 1), put the neutral leach supernatant containing 152 g / l of zinc and 0.052 g / l of cobalt leached from zinc calcined sand into the first-stage purification tank, and control the temperature of the first-stage purification to 65°C, according to the total amount of copper and cadmium. The amount of zinc powder is calculated as 3 times of the content. Add zinc powder, react for 1.5h, and filter through a filter press to obtain a section of copper cadmium residue and a filtered liquid. The Cu in the filtered liquid is 0.0015g / l, and the Cd is 0.028g. / l;

[0032] Step 2), heat up the filtered liquid in step 2 to 85-90°C and place it in the second-stage purification tank, and then pass through the second-stage purification 1# tank, the second-stage purification 2# tank, the second-stage purification 3# tank, Add zinc powder and antimony sa...

Embodiment 3

[0034] Embodiment 3, a method for deep purification and removal of cobalt in zinc hydrometallurgy, comprising the following steps:

[0035] Step 1), put the neutral leaching supernatant containing 140 g / l of zinc and 0.045 g / l of cobalt leached from zinc calcined sand into the first-stage purification tank, and control the temperature of the first-stage purification to 60°C, according to the total amount of copper and cadmium. The amount of zinc powder is calculated as 2.5 times of the content. Add zinc powder, react for 1.5h, and filter through a filter press to obtain a section of copper cadmium residue and a filtered liquid. The Cu in the filtered liquid is 0.0013g / l, and the Cd is 0.022g. / l;

[0036] Step 2), heat up the filtered liquid in step 2 to 85-90°C and place it in the second-stage purification tank, and then pass through the second-stage purification 1# tank, the second-stage purification 2# tank, the second-stage purification 3# tank, Add zinc powder and antimo...

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Abstract

The invention relates to a method for deeply cleaning and removing cobalt by wet hydrometallurgy. The method is characterized in that neutrally-leached supernate in wet hydrometallurgy is sequentially treated by a first-stage cleaning process, a second-stage cleaning process and a third-stage cleaning process to obtain new liquid containing not greater than 0.5mg / l cobalt, wherein the neutrally-leached supernate in wet hydrometallurgy is deeply purified through a cleaning agent and an activating agent in the second-stage cleaning process; the cleaning agent is alloy powder prepared through 50-65% by weight of zinc, 30-49% by weight of manganese, 0.05-2% by weight of aluminum, 0.05-2% by weight of magnesium, and 0.9-3% by weight of lead; the activating agent is one or two of antimonic salt and antimony white. The method has the advantages that the cobalt removing efficiency is outstanding, and particularly the zinc consumption is low and the purpose of deep cleaning can be achieved while the method is used for processing a high-cobalt zinc sulfate solution; meanwhile, impurities which damage the wet hydrometallurgy are not introduced; the operation is simple; the industrial implementation is easily carried out; and the economic benefit is obvious.

Description

technical field [0001] The invention belongs to the technical field of impurity removal in zinc hydrosmelting, and in particular relates to a method for deeply purifying and removing cobalt in zinc hydrosmelting by using improved manganese alloy powder. Background technique [0002] Purification is an important process of hydrometallurgy, a process between leaching and electrolysis in the hydrometallurgy process, and its technical indicators have an important impact on the normal operation and technical and economic indicators of the hydrometallurgy zinc system, especially Cobalt removal. The antimony salt zinc powder purification method in the zinc sulfate solution purification process has the advantages of safety, good purification effect, and mature process. It is widely used in most smelters at home and abroad. The conventional purification process is a low-temperature (55-65°C) removal of copper and cadmium; The second-stage high temperature (85°C-90°C) removes cobalt ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B19/20
CPCC22B19/20Y02P10/20
Inventor 杨腾蛟张利涛倪恒发张文科张阳翟爱萍尹荣花袁永峰朱志刚张向阳孔金换董高峰
Owner HENAN YUGUANG ZINC IND
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