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Treatment method of nickel wet method refining tailings based on high temperature reduction

A processing method and high temperature technology, applied in the metallurgical field, can solve the problems of unrecycled nickel and cobalt, nickel slag cannot be directly discharged, unqualified leaching toxicity, etc., and achieve the effect of high economy and resource recycling.

Active Publication Date: 2020-05-05
JINGMEN GEM NEW MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a treatment method for tailings from nickel wet refining based on high-temperature reduction, which is used to solve the problem that unqualified nickel slag leaching toxicity cannot be directly discharged in the prior art, and the nickel slag contains a lot of nickel and cobalt. The problem of being recycled

Method used

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  • Treatment method of nickel wet method refining tailings based on high temperature reduction
  • Treatment method of nickel wet method refining tailings based on high temperature reduction

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Table 1

[0023] Ni co mn sc Fe Al Cu Cr raw material 0.6201％ 0.2827％ 0.1829％ 0.0797％ 14.9174％ 1.2646％ 0.8371％ 0.2087％

[0024] Take 200g of nickel hydrometallurgy tailings raw material, the mass percentage of each component is shown in Table 1, add water to slurry, add 100g of concentrated sulfuric acid, and pre-soak at 80°C for 1 hour to obtain a pre-soaked slurry. Import the prepreg slurry into a pressure kettle, pressurize and leaching at 150°C for 2 hours, the total pressure in the kettle is 0.5MPa, and obtain leachate and leach slag after solid-liquid separation. Among them, the nickel leaching rate is 97%, the manganese leaching rate is 98%, and the cobalt leaching rate is 95%, (13.2%-46.9%). Wash the leach residue twice with water at a liquid-solid ratio of 3:1, and then wash it once with alkali at a pH of 8.0 to 8.5 to obtain general solid waste and nickel leachate that can meet the discharge standard, wherein nickel in...

Embodiment 2

[0026] Take 200g of nickel hydrometallurgy tailings raw material, the mass percentage of each component is the same as in Example 1, add water to slurry, add 60g of concentrated sulfuric acid, and pre-soak at 80°C for 1 hour to obtain a pre-soaked slurry. The prepreg slurry was introduced into a pressurized autoclave, and leached under pressure at 180°C for 5 hours. The total pressure in the autoclave was 0.97MPa. After solid-liquid separation, leachate and leaching residue were obtained. Among them, the nickel leaching rate is 98%, the manganese leaching rate is 95%, and the cobalt leaching rate is 94.5%. Wash the leach residue twice with water at a liquid-solid ratio of 3:1, and then wash it once with alkali at a pH of 8.0 to 8.5 to obtain general solid waste and nickel leachate that can meet the discharge standard, wherein nickel in the leachate: 1.84g / L, Cobalt: 0.45g / L, manganese: 0.52g / L, total iron: 5.2g / L, ferrous iron: 3.7g / L, copper: 0.83g / L. Into the high-temperatu...

Embodiment 3

[0028] Take 200g of nickel hydrometallurgy tailings raw material, the mass percentage of each component is the same as in Example 1, add water to slurry, add 40g of concentrated sulfuric acid, and pre-soak at 80°C for 1 hour to obtain a pre-soaked slurry. The prepreg slurry was introduced into a pressurized kettle, and leached under pressure at 200°C for 5 hours, the total pressure in the kettle was 0.97MPa, and the leachate and leaching residue were obtained after solid-liquid separation. Among them, the nickel leaching rate is 99%, the manganese leaching rate is 98%, and the cobalt leaching rate is 98%. Wash the leach residue twice with water at a liquid-solid ratio of 3:1, and then wash it once with alkali at a pH of 8.0 to 8.5 to obtain general solid waste and nickel leachate that can meet the discharge standard, wherein nickel in the leachate: 1.86g / L, Cobalt: 0.46g / L, manganese: 0.53g / L, total iron: 3.5g / L, ferrous iron: 3.5g / L, copper: 0.83g / L. Into the high-temperatur...

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Abstract

The invention discloses a treatment method of nickel wet method refining tailings based on high temperature reduction. The method is characterized by comprising the steps of ore pulp forming pre-leaching, high-temperature leaching out, reduction for copper deposition and vulcanization for nickel and cobalt deposition. The step of reduction for copper deposition specifically comprises the steps that a reducing agent is added into high-temperature leaching liquid obtained in the high-temperature leaching step, after the reaction, filtering is carried out, and liquid after copper deposition is obtained. Through the cooperation manner of high-temperature leaching, reduction for copper deposition and vulcanization for nickel and cobalt deposition, nickel slag is treated and is converted, afterleaching toxicity is qualified, the slag is discharged, meanwhile, nickel and cobalt contained in the slag is recycled, resources are recycled, and economy is high.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a treatment method for nickel wet refining tailings based on high-temperature reduction. Background technique [0002] With the explosion of new energy vehicles, the demand for ternary power batteries has also increased sharply. The core of the ternary power battery is the nickel-cobalt lithium manganate ternary positive electrode material. As one of the important raw materials for the precursor of the ternary positive electrode material, nickel sulfate salt mainly comes from nickel hydroxide cobalt intermediate product (MHP) and nickel cobalt sulfide intermediate. Products (MSP), nickel beans, nickel concentrate, nickel matte and other raw materials of wet refining products. In the wet refining process, due to the influence of phase, iron, aluminum and other impurity elements, the dispersion loss of valuable metals such as nickel and cobalt in the tailings during the leachin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B15/00C22B23/00
CPCC22B7/007C22B15/0071C22B15/0093C22B23/043C22B23/0461Y02P10/20
Inventor 许开华蒋振康李琴香王文杰张坤易庆平
Owner JINGMEN GEM NEW MATERIAL
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