A method for nickel nitrate/cobalt solution system transformation and nitric acid reuse

A technology of cobalt solution and nickel nitrate, applied in the direction of improving process efficiency, etc., can solve the problems of non-recyclable nitric acid, generation of waste residue and waste water, high production cost, etc., and achieve the effect of flexible product scheme, low operating cost and small investment

Active Publication Date: 2019-08-06
JINCHUAN GROUP LIMITED
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the nickel / cobalt smelting process, nitric acid is used to treat nickel / cobalt-containing materials. In order to meet the needs of multiple products, the nickel nitrate / cobalt solution obtained under the nitric acid system needs system transformation and nitric acid reuse. Traditionally, extraction transformation or calcination transformation is used. , but the production cost is high, waste residue and waste water will be generated during the transformation process, and nitric acid cannot be reused

Method used

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  • A method for nickel nitrate/cobalt solution system transformation and nitric acid reuse

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Experimental program
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Effect test

Embodiment 1

[0020] A nickel / cobalt nitrate solution: Ni 120g / L, Co 0.3g / L, Cu 0.5g / L, Zn 0.3g / L, Fe 0.01g / L. This nickel nitrate / cobalt solution is carried out system conversion and nitric acid recycling, specifically comprises the following steps:

[0021] a. An energy-saving and high-efficiency evaporator is used to evaporate and concentrate the nickel nitrate / cobalt solution, and the water vapor generated during the evaporation process is condensed into water for reuse.

[0022] b. The concentrated nickel / cobalt nitrate solution is subjected to spray pyrolysis at a temperature of 200°C to obtain nickel / cobalt oxide powder, which contains Ni 71.51%, NO 3 - 2.1%, the water vapor generated during the pyrolysis process is condensed into water for reuse, and nitrogen oxides are made into nitric acid for reuse.

[0023] c. Wash the nickel / cobalt oxide powder with water, control the liquid-solid ratio to 1:1, wash the temperature at 20°C, perform two-stage countercurrent washing, and retur...

Embodiment 2

[0028] A nickel / cobalt nitrate solution: Ni 80g / L, Co 1.8g / L, Cu 0.02g / L, Zn 0.3g / L, Fe 0.01g / L. This nickel nitrate / cobalt solution is carried out system conversion and nitric acid recycling, specifically comprises the following steps:

[0029] a. An energy-saving and high-efficiency evaporator is used to evaporate and concentrate the nickel nitrate / cobalt solution, and the water vapor generated during the evaporation process is condensed into water for reuse.

[0030] b. The concentrated nickel / cobalt nitrate solution is subjected to spray pyrolysis at a temperature of 500°C to obtain nickel / cobalt oxide powder, which contains Ni 66.32%, NO 3 - 3.2%, the water vapor generated during the pyrolysis process is condensed into water for reuse, and nitrogen oxides are made into nitric acid for reuse.

[0031] c. Wash the nickel / cobalt oxide powder with water, control the liquid-solid ratio to 5:1, wash the temperature at 80°C, perform two-stage countercurrent washing, return th...

Embodiment 3

[0036] A nickel nitrate / cobalt solution: Co 50g / L, Ni 3g / L, Cu 0.01g / L, Zn 0.25g / L, Fe 0.01g / L. This nickel nitrate / cobalt solution is carried out system conversion and nitric acid recycling, specifically comprises the following steps:

[0037] a. An energy-saving and high-efficiency evaporator is used to evaporate and concentrate the nickel nitrate / cobalt solution, and the water vapor generated during the evaporation process is condensed into water for reuse.

[0038] b. The concentrated nickel nitrate / cobalt solution is subjected to spray pyrolysis at a temperature of 300°C to obtain nickel / cobalt oxide powder. The nickel / cobalt oxide powder contains 70% Co, NO 3 - 2.8%, the water vapor generated during the pyrolysis process is condensed into water for reuse, and nitrogen oxides are made into nitric acid for reuse.

[0039] c. Wash the nickel / cobalt oxide powder with water, control the liquid-solid ratio to 2:1, wash at 40°C, perform two-stage countercurrent washing, and ...

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Abstract

The invention discloses a method for transformation and nitric acid reuse of a nickel nitrate / cobalt nitrate solution system. The nickel nitrate / cobalt nitrate solution system can be transformed into a sulfate and chlorate system at the low temperature; the requirements for producing various products such as nickel sulfate / cobalt sulfate, nickel chloride / cobalt chloride, and electrodeposited nickel / electrodeposited cobalt can be met; nitric acid regeneration and reuse and water cyclic utilization are achieved while system transformation is achieved; in the whole process, no impurity is introduced, and no waste water or waste residue is generated; clean and pollution-free effects are achieved; the method is easy to implement compared with a traditional extraction process; the investment is small, energy saving and environmental friendliness are achieved, and the operation cost is low; the method can be applied to production of various salts or metals; the product scheme is flexible, different market requirements can be met, and the method conforms to the environment-friendly development concept; and the method is a novel efficient and clean metallurgy technology and has good economic benefits and resource environment benefits.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal hydrometallurgy, and in particular relates to a method for system transformation of nickel nitrate / cobalt solution and nitric acid reuse. Background technique [0002] Nitric acid has strong oxidizing ability, can realize efficient and selective leaching of nickel, cobalt and iron, and can be recycled, which can effectively reduce acid consumption, environmental pollution and production cost. With the development and progress of equipment technology, nitric acid system smelting has become a possibility. In the nickel / cobalt smelting process, nitric acid is used to treat nickel / cobalt-containing materials. In order to meet the needs of multiple products, the nickel nitrate / cobalt solution obtained under the nitric acid system needs system transformation and nitric acid reuse. Traditionally, extraction transformation or calcination transformation is used. , but the production cost is high,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/22C22B3/44C22B23/00
CPCC22B3/22C22B3/44C22B23/0461C22B23/0476Y02P10/20
Inventor 刘玉强李尚勇张晗张娟张树峰李娟李维舟田忠元欧晓健席海龙李全陈彩霞王书友高晓婷朱锐伦郁洪波孔令军马天飞
Owner JINCHUAN GROUP LIMITED
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