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Production process of battery-grade nickel sulfate

A production process, nickel sulfate technology, applied in nickel sulfate, photography process, photography auxiliary process and other directions, can solve the problems of unseen, high silicon dioxide, high chromium, reduce the output of iron slag, avoid raw and auxiliary The consumption of materials and the effect of comprehensive utilization

Active Publication Date: 2022-07-12
成都盛威兴科新材料研究院合伙企业(有限合伙)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, since 2020, some companies have used laterite nickel ore as raw material to produce high-grade nickel matte by using the fire process of "rotary kiln drying - rotary kiln pre-reduction roasting - electric furnace reduction smelting - P-S converter vulcanization - blowing", which is essentially to vulcanize ferronickel , and then use converter blowing to obtain high nickel matte, and then use the leaching-extraction-evaporation crystallization process to produce battery-grade nickel sulfate, but there is no industrial application
In addition, the composition of ferronickel varies slightly depending on the place of origin. It has the characteristics of high silica, high chromium, and high impurity content. It is mainly used as a raw material for steelmaking. At present, it has not been directly used as a raw material for the production of nickel sulfate. related technologies

Method used

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  • Production process of battery-grade nickel sulfate
  • Production process of battery-grade nickel sulfate
  • Production process of battery-grade nickel sulfate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The present embodiment is used for producing battery-grade nickel sulfate and generating by-product pure iron, including the following steps:

[0040] S1. Electrolysis of nickel-iron alloys

[0041] The electrolysis environment includes cathode, cathode chamber, diaphragm bag, anode and anode chamber, the material of cathode is iron starting plate, and the material of anode is nickel-iron alloy;

[0042] Dissolve ferrous sulfate and ammonium sulfate in pure water to prepare a mixed solution containing 250 g / L ferrous sulfate and 120 g / L ammonium sulfate, adjust the pH of the mixed solution to 4.0 with sulfuric acid solution, and inject the mixed solution into the cathode The chamber becomes the catholyte, the mixed liquid enters the anode chamber through the diaphragm to form the anolyte, maintains the liquid level difference between the cathode and anode at 20mm, starts electrolysis when electrified, the voltage is 5V, and the current density is 150A / m 2 , the electro...

Embodiment 2

[0055] The present embodiment is used for producing battery-grade nickel sulfate and generating by-product pure iron, including the following steps:

[0056] S1. Electrolysis of nickel-iron alloys

[0057] The electrolysis environment includes cathode, cathode chamber, diaphragm bag, anode and anode chamber, the material of cathode is iron starting plate, and the material of anode is nickel-iron alloy;

[0058] Dissolve ferrous sulfate and ammonium sulfate in pure water to prepare a mixed solution containing 200 g / L ferrous sulfate and 100 g / L ammonium sulfate, adjust the pH of the mixed solution to 3.0 with sulfuric acid solution, and inject the mixed solution into the cathode The chamber becomes the catholyte, the mixed liquid enters the anode chamber through the diaphragm to form the anolyte, maintains the liquid level difference between the cathode and anode at 10mm, starts electrolysis when electrified, the voltage is 2V, and the current density is 100A / m 2 , the electro...

Embodiment 3

[0071] The present embodiment is used for producing battery-grade nickel sulfate and generating by-product pure iron, including the following steps:

[0072] S1. Electrolysis of nickel-iron alloys

[0073] The electrolysis environment includes cathode, cathode chamber, diaphragm bag, anode and anode chamber, the material of cathode is iron starting plate, and the material of anode is nickel-iron alloy;

[0074] Dissolve ferrous sulfate and ammonium sulfate in pure water to prepare a mixed solution containing 300 g / L ferrous sulfate and 150 g / L ammonium sulfate, adjust the pH of the mixed solution to 5.5 with sulfuric acid solution, and inject the mixed solution into the cathode The chamber becomes the catholyte, the mixed liquid enters the anode chamber through the diaphragm to form the anolyte, maintains the liquid level difference between the cathode and anode at 30mm, starts electrolysis when electrified, the voltage is 8V, and the current density is 200A / m 2 , the electro...

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Abstract

The invention relates to the technical field of hydrometallurgy, and particularly provides a production process of battery-grade nickel sulfate, which comprises the following steps: S1, a nickel-iron alloy is electrolyzed, an electrolysis environment comprises a cathode, a cathode chamber, a diaphragm bag, an anode and an anode chamber, the cathode is made of an iron starting sheet, the anode is made of the nickel-iron alloy, pure iron is obtained at the cathode, and pure nickel is obtained at the anode chamber; anolyte is obtained in the anode chamber; s2, nickel removal treatment is conducted on the anolyte obtained in the step S1, and nickel sulfide and nickel-removed liquid are obtained; s3, the nickel-removed liquid obtained in the step S2 is subjected to chromium removal treatment, chromium slag and treated liquid are obtained, and the obtained treated liquid is returned to the cathode chamber of the electrolysis procedure in the step S1 to be recycled; s4, treating the nickel sulfide obtained in the step S2 as a raw material to obtain battery-grade nickel sulfate; according to the production process provided by the invention, nickel can be separated from ferronickel and then treated to obtain battery-grade nickel sulfate, and meanwhile, pure iron is produced as a byproduct, so that comprehensive utilization of resources is realized.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to a production process of battery-grade nickel sulfate. Background technique [0002] Nickel (Ni) is an important strategic metal, mainly used in lithium-ion batteries, superalloys, electroplating and other industries. Primary nickel mainly comes from mineral resources. Nickel ore is mainly divided into two types: nickel sulfide ore and laterite nickel ore, which correspond to different processing paths. Nickel sulfide ore is firstly smelted by pyrometallurgical process to form intermediate products with high nickel matte, and then directly produced nickel sulfate or electrolytically produced electrolytic nickel through wet process. It is mainly used in electroplating, battery and alloy fields, and some electrolytic nickel is used in stainless steel industry; laterite Nickel ore generally uses pyrometallurgy to directly produce nickel ferronickel and then produce stainless...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/10C25C1/06
CPCC01G53/10C01G53/003C25C1/06C01P2006/80Y02P10/20
Inventor 雷军鹏金鑫郑继明罗军甄勇熊平杜敏马杰章毅李琼莉安曼丽王紫燕何家齐郭在伟
Owner 成都盛威兴科新材料研究院合伙企业(有限合伙)
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