Spherical nickel protoxide segmented oxidation acid leaching treatment method

A technology of nickelous oxide and a treatment method, applied in the chemical industry, can solve the problems of difficulty in utilizing large-particle nickelous oxide and high processing cost, and achieve the effects of significant economic and social benefits, short technological process, and easy industrialization.

Inactive Publication Date: 2019-12-24
JINCHUAN GROUP LIMITED +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problems existing in the prior art that the industrial utilization of large-particle nickelous oxide is difficult and the processing cost is high, the present invention provides a method for segmental oxidation acid leaching of spherical nickelous oxide

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  • Spherical nickel protoxide segmented oxidation acid leaching treatment method

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Embodiment 1

[0029] A segmented oxidative acid leaching treatment method for spherical nickelous oxide, using a ball mill to mechanically activate the spherical granular nickelous oxide raw material to a material particle size of about 20 μm, 10m 3 There are two stages of leaching in the reaction kettle, among which 4.5mol / L sulfuric acid is used in the second stage reaction kettle, 2.0mol / L sulfuric acid is added in the first stage, and the temperature is raised to 100°C, and mechanically activated nickelous oxide is added in the first stage reaction kettle, and the flow rate is 2.3t / h, secondary acid addition, sulfuric acid flow rate 1.62m 3 / h, pure water flow 4.92m 3 / h, no acid is added at the first stage, only water is added, and the water flow rate is 8.2m 3 / h, keeping the acidity of the leaching solution unchanged, leaching for 0.5h, adding sodium persulfate in the two stages of leaching, and the flow rate of 20% sodium persulfate is 1.1m 3 / h, after the first-stage leaching is...

Embodiment 2

[0031] A segmented oxidative acid leaching treatment method for spherical nickelous oxide, using a ball mill to mechanically activate spherical granular nickelous oxide raw materials until the particle size of the material is about 30 μm, 10m 3 Two-stage leaching of the reaction kettle, wherein, the second-stage reaction kettle is 3.5mol / L sulfuric acid, the first-stage reaction kettle is added with 2.5mol / L sulfuric acid, and the temperature is raised to 90°C, and the first-stage reaction kettle is added with mechanically activated nickelous oxide, and the flow rate is 0.72 t / h, secondary acid addition, sulfuric acid flow rate 0.51m 3 / h, pure water flow 1.87m 3 / h, no acid is added at the first level, only water is added, and the water flow is 1.87m 3 / h, to maintain the acidity of the leaching solution, leaching for 2h, adding hydrogen peroxide in the two stages of leaching, and the flow rate of 30% sodium persulfate is 0.35m 3 / h, add mechanically activated nickelous oxid...

Embodiment 3

[0033] A segmented oxidative acid leaching treatment method for spherical nickelous oxide, using a ball mill to mechanically activate the spherical granular nickelous oxide raw material to a material particle size of about 50 μm, 10m 3 There are two stages of leaching in the reaction kettle, among which 4.5mol / L sulfuric acid is used in the second stage reaction kettle, 3.5mol / L sulfuric acid is added in the first stage, and the temperature is raised to 85°C, and mechanically activated nickelous oxide is added in the first stage reaction kettle, and the flow rate is 0.67t / h, secondary acid addition, sulfuric acid flow rate 0.48m 3 / h, pure water flow 1.44m 3 / h, no acid is added at the first stage, only water is added, and the water flow rate is 0.59m 3 / h, to maintain the acidity of the leaching solution, add hydrogen peroxide during the two-stage leaching process, and the flow rate of 30% sodium persulfate is 0.67m 3 / h, leaching for 3h. After thickening with a thickener,...

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Abstract

The invention relates to a spherical nickel protoxide segmented oxidation acid leaching treatment method. The spherical nickel protoxide segmented oxidation acid leaching treatment method comprises the steps of conducting mechanical activation on spherical nickel protoxide and then conducting two-stage countercurrent oxidation and acid leaching on nickel protoxide subjected to mechanical activation; adding pure and acid-soluble materials containing nickel, cobalt and manganese such as acid-soluble ternary precursor waste, nickel powder and cobalt powder to a first-stage leaching agent and adding an appropriate reducing agent or oxidizing agent according to the material properties to consume acid in the leaching agent to allow the pH value to reach up to 4.0 or more to obtain a nickel leaching agent; and applying the acid consumed leaching agent to synthesis of ternary precursors and preparation of high-purity nickel plates, nickel sulfate, nickel chloride crystals and the like. Throughthe spherical nickel protoxide segmented oxidation acid leaching treatment method, the recovery and utilization rate of nickel protoxide is high, the technological process is short, and the method issimple and easy to implement, low in cost, small in investment and obvious in economic and social benefit.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to the recovery and utilization of nickel elements in spherical nickelous oxide, in particular to a segmental oxidation acid leaching treatment method for spherical nickelous oxide. Background technique [0002] Nickel is often used in the manufacture of stainless steel, alloy structural steel and other steel fields, electroplating, high-nickel-based alloys and batteries, and is widely used in various military manufacturing industries such as aircraft and radar, civil machinery manufacturing and electroplating industries. Nickel is widely used in steel fields such as stainless steel and alloy steel due to its good corrosion resistance, high temperature resistance, and rust resistance. Nickel consumption is the largest in stainless steel applications, and 2 / 3 of the world's primary nickel ore is used in the production of stainless steel. Nickel-doped alloy steel can improve the strengt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/06C22B3/08C22B3/10C22B23/00
CPCC22B3/065C22B3/08C22B3/10C22B23/0423C22B23/043C22B23/0438Y02P10/20
Inventor 柴艮风王悦王国超李伟郭培庆江名喜鲁相杰何艳李兰兰王甲琴陈天翼
Owner JINCHUAN GROUP LIMITED
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