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Device and method for recovering nickel and cobalt and co-producing magnesium oxide from nickel-cobalt-magnesium waste liquid

A nickel-cobalt-magnesium and magnesium oxide technology, applied in the chemical industry, can solve the problems of no efficient separation and recovery device or method, unstable product quality, less magnesium oxide products, etc., to achieve improved physical and chemical properties, low cost and high economic value. Effect

Active Publication Date: 2021-07-30
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the production of magnesium oxide in my country is still at a low level, most of which are in the rough stage of magnesium compound products, and there are few high value-added magnesium oxide products, unstable product quality, high production costs, environmental pollution and other problems still exist
[0003] In summary, there is currently no relevant efficient separation and recovery device or method for the large amount of nickel, cobalt, and magnesium mixed liquid that is by-produced in the production process of the ternary precursor

Method used

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  • Device and method for recovering nickel and cobalt and co-producing magnesium oxide from nickel-cobalt-magnesium waste liquid
  • Device and method for recovering nickel and cobalt and co-producing magnesium oxide from nickel-cobalt-magnesium waste liquid
  • Device and method for recovering nickel and cobalt and co-producing magnesium oxide from nickel-cobalt-magnesium waste liquid

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Effect test

Embodiment 1

[0060] The device for recovering nickel and cobalt and co-producing magnesium oxide from nickel-cobalt-magnesium waste liquid provided in this embodiment includes a nickel-cobalt separation and recovery system, a magnesium compound separation and recovery system, an atmosphere roaster and a depolymerization crusher connected in sequence.

[0061] The nickel-cobalt separation and recovery system is a nickel-cobalt extraction and separation device; the magnesium compound separation and recovery system includes a magnesium compound separator and a filter system; the nickel-cobalt separation and recovery system is connected to the filter system through a magnesium compound separator; The compound separator is connected with the atmosphere roaster through a filter system; the nickel-cobalt extraction and separation device includes an extraction tank and a stripping tank, one end of the extraction tank is connected to the stripping tank, and the other end is connected to the magnesium...

Embodiment 2

[0064] The device for recovering nickel and cobalt and co-producing magnesium oxide from nickel-cobalt-magnesium waste liquid provided in this embodiment includes a nickel-cobalt separation and recovery system, a magnesium compound separation and recovery system, an atmosphere roaster and a depolymerization crusher connected in sequence.

[0065] The nickel-cobalt separation and recovery system is a nickel-cobalt compound separation device; the magnesium compound separation and recovery system includes a magnesium compound separator and a filter system; the nickel-cobalt separation and recovery system is connected to the filter system through a magnesium compound separator; The compound separator is connected with the atmosphere roaster through a filter system; the nickel-cobalt compound separator includes a nickel-cobalt compound separator and a nickel-cobalt filter system, and the nickel-cobalt compound separator is connected with the magnesium compound separator through a nic...

Embodiment 3

[0068] The method that present embodiment provides reclaims nickel, cobalt and co-produces magnesium oxide from nickel-cobalt-magnesium waste liquid, such as image 3 As shown, it specifically includes the following steps:

[0069] (1) Extraction and separation of nickel and cobalt: 100L mixed waste liquid (pH2 SO 4 Perform back extraction to recover nickel and cobalt to obtain a nickel-cobalt-containing solution and a magnesium-containing solution, wherein the nickel-cobalt recovery rate is greater than 96%;

[0070] (2) The magnesium-containing solution gained in step (1) is transported to the magnesium compound separation reactor, and its pH is adjusted to about 7, and the Mg ion content in the measurement solution is 22.5g / L. Based on the magnesium ion content, add 1.3 times Ammonium bicarbonate of the amount of magnesium ion substance and 3L 25% ammoniacal liquor, after stirring for 30min, the feed liquid temperature of the magnesium compound separation reactor is raised...

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Abstract

The invention provides a device and method for recovering nickel and cobalt from nickel-cobalt-magnesium waste liquid and co-producing magnesia. The device includes a nickel-cobalt separation and recovery system, a magnesium compound separation and recovery system, an atmosphere roasting furnace and Crusher. The method comprises: firstly separating and recovering nickel-cobalt from nickel-cobalt-magnesium waste liquid by extraction method or sulfidation precipitation method to obtain magnesium-containing solution; then adding bicarbonate and ammonia water to the magnesium-containing solution, stirring, heating, heat preservation and filtering to obtain basic magnesium carbonate; then drying the basic magnesium carbonate and roasting in an atmosphere to obtain high-purity magnesium oxide; finally crushing the high-purity magnesium oxide to obtain silicon steel magnesium oxide products. Through the innovative design, combination and precise control of equipment, the present invention realizes the efficient separation of nickel and cobalt and the low-cost preparation of high-purity magnesium oxide products, and realizes the economical and efficient utilization of nickel-cobalt-magnesium waste liquid resources, which has a very broad market prospects.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a device and method for recovering nickel and cobalt from nickel-cobalt-magnesium waste liquid and co-producing magnesium oxide. Background technique [0002] In recent years, the demand and production capacity of ternary lithium battery cathode materials have been increasing. During the production or recycling of ternary precursors, a large amount of waste liquid mainly containing nickel, cobalt, and magnesium metal ions is usually produced by-product, among which nickel, cobalt, and magnesium metals all have high recovery value. However, the prior art generally only focuses on the recovery of nickel and cobalt, and pays little attention to the recovery of a large amount of magnesium resources rich in it, resulting in a serious waste of magnesium resources. At the same time, the supply of high-purity magnesium oxide in my country is in serious shortage. At present, d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B23/00C22B3/38C01F5/02
CPCC01F5/02C01P2004/61C01P2006/80C22B7/006C22B23/0453C22B3/3842Y02P10/20
Inventor 钟宏曹占芳王帅
Owner CENT SOUTH UNIV
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