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Environment-friendly process for producing lithium hydroxide monohydrate by mixing spodumene and salt lake ore

A technology of lithium hydroxide monohydrate and lithium hydroxide, which is applied in the direction of lithium oxide;/hydroxide, mixer, mixer with rotating stirring device, etc., can solve the problem of low utilization rate of raw materials and achieve increased resistance Insufficient resources, improving uniformity, and reducing the effect of calcium ion content

Pending Publication Date: 2021-04-06
CENT SOUTH UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] When producing lithium hydroxide by the traditional process, spodumene needs to be calcined at a high temperature of 950-1200 ° C. The smoke generated during the calcination process passes through the tail gas treatment system, and the dust is recovered and then calcined. However, it is easy to generate dust at the collection point and cause environmental protection. At the same time, the dust also contains active ingredients, resulting in low utilization of raw materials

Method used

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  • Environment-friendly process for producing lithium hydroxide monohydrate by mixing spodumene and salt lake ore
  • Environment-friendly process for producing lithium hydroxide monohydrate by mixing spodumene and salt lake ore
  • Environment-friendly process for producing lithium hydroxide monohydrate by mixing spodumene and salt lake ore

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Embodiment Construction

[0055] The present invention will be further described below in conjunction with accompanying drawing, but protection scope of the present invention is not limited to the following description.

[0056] Such as figure 1 with figure 2 Shown, a kind of environment-friendly type mixes the technique for producing lithium hydroxide monohydrate with spodumene and salt lake ore, comprises the following steps:

[0057] S1. Transform the spodumene through calcination. The calcination process is carried out in the rotary kiln. The smoke generated by the rotary kiln passes through the tail gas treatment system, and the dust is recycled to the biaxial humidification mixer for humidification treatment, and then calcined again, and then sequentially cooled, Fine grinding, acid reaction, cooling, after the acid reaction product is cooled to ≤90°C, it is made into a slurry with water, and the solid content of the slurry is 10% to 70%;

[0058] S2. Add calcium carbonate slurry to the slurry...

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Abstract

The invention relates to the technical field of lithium hydroxide production, in particular to an environment-friendly process for producing lithium hydroxide monohydrate by mixing spodumene and salt lake ore. The environment-friendly process comprises the following steps: sequentially carrying out high-temperature calcination on spodumene through a rotary kiln, and treating smoke dust generated in the calcination process through a tail gas treatment system, and recovering the dust to a double-shaft humidifying stirrer for humidifying treatment, calcining again, cooling, finely grinding, adding acid for reaction, cooling, size mixing, leaching, squeezing and separating by a filter press, adding salt lake ore, purifying, filtering, causticizing, freezing again to separate sodium sulfate, evaporating, recrystallizing at low temperature, drying and the like. According to the process for producing the lithium hydroxide monohydrate by mixing the spodumene and the salt lake ore, the spodumene and the salt lake ore are used as raw materials and are mixed to produce the lithium hydroxide monohydrate, so that the problem of insufficient lithium ore resources is solved, the risk of insufficient resources of a production line is increased, and meanwhile, the problem of low quality of lithium hydroxide produced from salt lake ore resources is solved.

Description

technical field [0001] The invention relates to the technical field of lithium hydroxide production, in particular to an environment-friendly process for producing lithium hydroxide monohydrate by mixing spodumene and salt lake ore. Background technique [0002] Lithium hydroxide is widely used in chemical raw materials, metallurgy, battery industry, ceramics, national defense, atomic energy, aerospace and other industries. In the battery industry, it is used as an additive for alkaline storage batteries, which can prolong its life and increase storage capacity. At present, the main method of producing lithium hydroxide monohydrate is to use spodumene as raw material, undergo high-temperature calcination transformation, cooling, ball milling, acidification roasting, cooling, pulping, leaching and pressing separation, freezing and separation of sodium sulfate, evaporation, low-temperature recrystallization, etc. process steps. [0003] Products produced from salt lake ores a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D15/02B01F7/18
CPCC01D15/02B01F27/191B01F27/90
Inventor 汪梨超李荐何开茂何东利伍震洲许小林杨贤丽代道和黄剑新谭培渊
Owner CENT SOUTH UNIV
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