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Short-process double-coupling continuous grinding and leaching method

A dual-coupling, short-process technology, applied to the improvement of process efficiency and grain processing, can solve the problems of low efficiency, high processing cost, and environmental pollution of Alnico scrap magnets, so as to save the amount of sulfuric acid and increase the leaching speed , the effect of shortening the production process

Active Publication Date: 2020-05-19
赣州逸豪优美科实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide a method for continuous grinding and leaching with short-flow dual coupling, which aims to solve the problem that the positive electrode materials of waste lithium batteries will pollute the environment to a certain extent, and The treatment cost is high, and the separate treatment of Alnico waste magnetic steel is inefficient, time-consuming, and has certain risks, and it is also easy to cause technical problems of environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] According to the molar ratio of the two raw materials [n(Ni)+n(Co)+n(Mn)] (lithium battery positive electrode waste): [n(Fe)×3+n(Al)×3+n(Ni)× 2+n(Co)×2+n(Cu)×2] (alnico scrap magnet steel)=0.6:1 for batching, the prepared lithium battery positive electrode scrap and alnico scrap magnet steel and an appropriate amount of sulfuric acid The solution is continuously added to the four-stage grinder for continuous grinding, and leaching is carried out while grinding. The temperature of the continuous grinding and leaching is controlled to be 65±5°C, and the liquid-solid mass ratio of the continuous grinding and leaching is controlled to be 10:1. Supplement an appropriate amount of sulfuric acid in the four-stage vibrating mill, control the pH value of the grinding and leaching system to 1.0-1.5, and control the grinding time of each stage to 0.5h, so that the grinding balls of the four-stage grinding are all ceramic materials, and the grinding balls The diameter decreases ste...

Embodiment 2

[0055] According to the molar ratio of the two raw materials [n(Ni)+n(Co)+n(Mn)] (lithium battery positive electrode waste): [n(Fe)×3+n(Al)×3+n(Ni)× 2+n(Co)×2+n(Cu)×2] (alnico scrap magnet steel)=0.9:1 for batching, the prepared lithium battery positive electrode scrap and alnico scrap magnet steel and an appropriate amount of sulfuric acid The solution is continuously added to the three-stage grinder for continuous grinding, and leaching is carried out while grinding. The temperature of the continuous grinding and leaching is controlled to be 85±5°C, and the liquid-solid mass ratio of the continuous grinding and leaching is controlled to be 8:1. Supplement an appropriate amount of sulfuric acid in the three-stage vibrating mill, control the pH value of the grinding and leaching system to 1.0-1.5, and control the grinding time of each stage to 1h, so that the grinding balls of the three-stage grinding are all ceramic materials, and the diameter of the grinding balls Decrease s...

Embodiment 3

[0057] According to the molar ratio of the two raw materials [n(Ni)+n(Co)+n(Mn)] (lithium battery positive electrode waste): [n(Fe)×3+n(Al)×3+n(Ni)× 2+n(Co)×2+n(Cu)×2] (alnico scrap magnet steel)=0.8:1 for batching, the prepared lithium battery positive electrode scrap and alnico scrap magnet steel and an appropriate amount of sulfuric acid The solution is continuously added to the three-stage grinder for continuous grinding, and leaching is carried out while grinding. The temperature of the continuous grinding and leaching is controlled to be 75±5°C, and the liquid-solid mass ratio of the continuous grinding and leaching is controlled to be 3:1. Supplement an appropriate amount of sulfuric acid in the three-stage vibrating mill, control the pH value of the grinding and leaching system to 1.0-1.5, and control the grinding time of each stage to 1.5h, so that the grinding balls of the three-stage grinding are all ceramic materials, and the grinding balls The diameter decreases s...

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Abstract

The invention discloses a short-process double-coupling continuous grinding and leaching method. The short-process double-coupling continuous grinding and leaching method aims to solve the problems that the environment is polluted to a certain extent and the treatment cost is high when a positive electrode material of a waste lithium battery is independently treated at present, the efficiency is low when aluminum-nickel-cobalt waste magnetic steel is independently treated, the time consumption is relatively long, certain danger is caused, meanwhile, the environmental pollution is also easily caused. According to the method, valuable elements such as cobalt, copper, nickel, lithium and manganese in the positive electrode of the waste lithium battery and the aluminum-nickel-cobalt waste magnetic steel are efficiently and comprehensively recovered in a multi-stage grinding, leaching and coupling leaching mode by combining coupling ingredients in a specific proportion and corresponding solid-liquid separation, so that the method has the characteristics of short process flow, high recovery rate, low treatment cost and the like, and has economic and environment-friendly benefits.

Description

technical field [0001] The invention belongs to the field of recycling valuable metal wastes containing nickel and cobalt, and specifically belongs to a method for continuous grinding and leaching with short flow and double coupling. Background technique [0002] At present, with the widespread application of lithium-ion batteries, the number of waste lithium batteries is also increasing. It is expected that around 2020, the cumulative amount of scrapped power batteries of pure electric passenger cars and hybrid passenger cars in my country will reach 12. ~170,000 tons. Among them, the ternary positive electrode materials of waste lithium batteries contain high-value elements such as nickel, cobalt, lithium, manganese, etc., so it is very necessary to recycle them, but these elements are difficult to be leached in sulfuric acid solution, so they are usually added Sodium sulfite, sulfur dioxide, hydrogen peroxide and other reducing agents can reduce these high-valence element...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B23/00C22B15/00C22B47/00C22B26/12B02C17/10B02C17/20B02C25/00
CPCB02C17/10B02C17/20B02C25/00B02C2201/06C22B7/007C22B15/0067C22B23/0415C22B26/12C22B47/00Y02P10/20
Inventor 熊以俊许用华董皓诚黄仁如
Owner 赣州逸豪优美科实业有限公司