Unlock instant, AI-driven research and patent intelligence for your innovation.

A method for continuous grinding and leaching with short flow and double coupling

A dual-coupling, short-process technology, applied in the direction of process efficiency improvement, grain processing, etc., can solve the problems of low efficiency, high processing cost, and environmental pollution of Alnico scrap magnets, and achieve saving of sulfuric acid consumption, reduction of oxidants, The effect of increasing the leaching speed

Active Publication Date: 2021-07-20
赣州逸豪优美科实业有限公司
View PDF0 Cites 0 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a short-flow dual-coupling method for continuous grinding and leaching. The method aims to solve the problem that the positive electrode materials of waste lithium batteries will pollute the environment to a certain extent, and the processing cost is high. Cobalt waste magnetic steel has low efficiency, takes a long time, and has certain dangers, and it is also easy to cause technical problems of environmental pollution. This method uses multi-stage milling and leaching coupling leaching, combined with specific proportions of coupling ingredients and corresponding solid-liquid separation, so as to realize the efficient extraction of valuable elements such as cobalt, copper, nickel, lithium, manganese, etc. Comprehensive recovery, and the coupling of grinding and leaching, it has the characteristics of short process flow, high recovery rate, low treatment cost, etc., and has dual benefits of economy and environmental protection.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(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