Wet treatment process of ferronickel material

A technology of wet processing and process, which is applied in the field of wet processing of nickel-iron materials, can solve safety problems and other problems, achieve the effect of low consumption and ensure safe application

Active Publication Date: 2020-08-07
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a wet treatment process for ferronickel materials, to solve the safety problems of the ferronickel materials in the prior art under pressure acid leaching

Method used

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  • Wet treatment process of ferronickel material
  • Wet treatment process of ferronickel material
  • Wet treatment process of ferronickel material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038]Adopt 325-mesh nickel-iron powder, wherein the nickel content is 9%, and the iron content is 90%. Mix 175g of concentrated sulfuric acid, water and 1kg of nickel-iron powder to form a system to be leached with a liquid-solid ratio of 8:1, and use normal pressure oxygen leaching treatment, the oxidation leaching temperature is 70°C, and the oxidation leaching time is 15h. The pH value of the leaching system is controlled between 2.0 and 5.0, and 93vol% oxygen-enriched air is introduced as an oxidant, and sodium sulfite is added as a strengthening agent, and the sodium sulfite is 2% of the total mass of nickel-iron powder. No hydrogen gas was detected during the leaching treatment. After the oxygen leaching treatment was completed, filter to obtain a crude nickel sulfate solution and a solid phase containing iron oxide. The solid phase containing iron oxide was washed to obtain a washed liquid, and the washed liquid Incorporate into the crude nickel sulfate solution. The ...

Embodiment 2

[0040] Adopt 325-mesh nickel-iron powder, wherein the nickel content is 9%, and the iron content is 90%. Mix 175g of concentrated sulfuric acid, water and 1kg of nickel-iron powder to form a system to be leached with a liquid-solid ratio of 2:1. High-pressure oxygen leaching is used at a pressure of 1.8MPa, an oxidation leaching temperature of 200°C, and an oxidation leaching time of 15 hours. During the process, the pH value of the system to be leached is controlled between 2.0 and 5.0, and 93vol% oxygen-enriched air is introduced as an oxidant, and sodium sulfite is added as a strengthening agent, and the sodium sulfite is 2% of the total mass of nickel-iron powder. Stirring, no hydrogen gas is detected during the oxygen leaching treatment process, after the oxygen leaching treatment is completed, filter to obtain a thick nickel sulfate solution and a solid phase containing iron oxide, wash the solid phase containing iron oxide to obtain a washed liquid, The washed liquid wa...

Embodiment 3

[0042] Adopt 325-mesh nickel-iron powder, wherein the nickel content is 9%, and the iron content is 90%. Mix 175g of concentrated sulfuric acid, water and 1kg of nickel-iron powder to form a system to be leached with a liquid-solid ratio of 5:1, and use normal pressure oxygen leaching treatment, the oxidation leaching temperature is 30°C, and the oxidation leaching time is 24h. The pH value of the leaching system is controlled between 2.0 and 5.0, and 93vol% oxygen-enriched air is introduced as an oxidant, and sodium sulfite is added as a strengthening agent, and the sodium sulfite is 2% of the total mass of nickel-iron powder. No hydrogen gas was detected during the leaching treatment. After the oxygen leaching treatment was completed, filter to obtain a crude nickel sulfate solution and a solid phase containing iron oxide. The solid phase containing iron oxide was washed to obtain a washed liquid, and the washed liquid Incorporate into the crude nickel sulfate solution. The...

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Abstract

The invention provides a wet treatment process of a ferronickel material. The wet treatment process comprises the following steps: carrying out oxygen leaching treatment on ferronickel powder to obtain a nickel sulphate solution and a solid containing ferric oxide, wherein the oxygen leaching treatment comprises the steps that sulfuric acid and ferronickel powder are mixed to form a to-be-leachedsystem, an oxidizing agent and an enhancer are added into the to-be-leached system for oxidation leaching, ore pulp containing nickel sulfate and ferric oxide is obtained, and the enhancer is a compound containing SO2 groups. The oxidizing agent and the enhancer are added in the oxygen leaching treatment process, iron in the ferronickel powder is oxidized into ferric oxide by the oxidizing agent,then the ferric oxide is separated from a solution in a precipitation form, and nickel and sulfuric acid react to form nickel sulfate under the action of the enhancer. According to the wet treatment process, the consumption of sulfuric acid is low, no obvious bubbles are generated in the reaction process, it is indicated that no hydrogen is generated in the process, and the safety problem is effectively solved. Meanwhile, iron is precipitated in the form of iron oxide so as to be separated from nickel, and the iron oxide can be directly used as an iron oxide red product.

Description

technical field [0001] The invention relates to the field of nickel smelting, in particular to a wet treatment process for ferronickel materials. Background technique [0002] At present, ferronickel is mainly used in stainless steel smelting. With the growth of ternary power batteries, the application of nickel in power batteries is showing an explosive trend. The industry is gradually paying attention to how a large amount of ferronickel is converted into nickel sulfate solution through hydrometallurgical processes. [0003] The ferronickel commonly used in the laboratory forms nickel sulfate and ferrous sulfate through pressurized acid leaching. However, a large amount of hydrogen gas is released due to the replacement reaction in the process, and the hydrogen gas cannot be released in time under high pressure conditions. Once the concentration of hydrogen gas reaches the limit concentration, it will An explosion occurred, which in turn caused a safety problem. Based on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/10C01G49/06C22B3/38C22B3/00B22F1/00
CPCC01G53/10C01G49/06C22B23/0407C01P2006/80C22B3/3842C22B3/3844C22B3/3846B22F1/145Y02P10/20
Inventor 孙宁磊刘诚李诺刘苏宁黄松宇李明川姚心彭建华
Owner CHINA ENFI ENGINEERING CORPORATION
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