阅读说明：本技术 一种氢氧化锂药粒废料的回收再利用处理方法 (Recycling treatment method of lithium hydroxide particle waste ) 是由 闫月明 闫亚辉 刘杰 于 2019-11-29 设计创作，主要内容包括：本发明涉及一种氢氧化锂药粒废料的回收再利用处理方法,属于废料回收再利用技术领域。将氢氧化锂药粒废料经球磨粉碎后过筛,然后在水浴锅中搅拌加热,得到混合液；所述混合液用滤布包裹,离心过滤,滤饼烘干,滤液收集；滤饼粉粹过筛,与氢氧化钙反应生成碳酸钙和氢氧化锂,分离得氢氧化锂滤液；将得到的滤液加热搅拌,水分蒸发,达到氢氧化锂饱和浓度后,放入晶种,自然降温,过滤后得到单水氢氧化锂。所述方法实现了氢氧化锂药粒废料的回收再利用,节约了大量资源,提高了经济效益。(The invention relates to a recycling treatment method of lithium hydroxide particle waste, belonging to the technical field of waste recycling. Grinding and sieving lithium hydroxide particle waste materials by ball milling, and then stirring and heating in a water bath kettle to obtain a mixed solution; wrapping the mixed solution with filter cloth, performing centrifugal filtration, drying a filter cake, and collecting filtrate; crushing and sieving the filter cake, reacting the filter cake with calcium hydroxide to generate calcium carbonate and lithium hydroxide, and separating to obtain a lithium hydroxide filtrate; and heating and stirring the obtained filtrate, evaporating water to reach the lithium hydroxide saturated concentration, putting seed crystals, naturally cooling, and filtering to obtain the lithium hydroxide monohydrate. The method realizes the recycling of the lithium hydroxide particle waste, saves a large amount of resources and improves the economic benefit.)

1. A recycling treatment method of lithium hydroxide particle waste comprises the following steps:

(1) grinding and sieving lithium hydroxide particle waste materials by ball milling, and then stirring and heating in a water bath kettle to obtain a mixed solution; wrapping the mixed solution with filter cloth, performing centrifugal filtration, drying a filter cake, and collecting filtrate;

(2) the filter cake is crushed and sieved and then reacts with calcium hydroxide, and after the reaction is finished, filtrate is obtained through separation;

(3) and (3) heating and stirring the filtrate obtained in the step (1) and the step (2), evaporating water to reach the lithium hydroxide saturated concentration, putting seed crystals, naturally cooling, and filtering to obtain the lithium hydroxide monohydrate.

Technical Field

The invention relates to a recycling treatment method of lithium hydroxide particle waste, belonging to the technical field of waste recycling.

Background

The method is characterized in that the naval of China starts to deploy and research a lithium hydroxide carbon dioxide absorption technology at the end of the last century to form products such as a lithium hydroxide carbon dioxide absorption device, the device is matched with a lithium hydroxide tank for use, lithium hydroxide medicine particles are filled in the lithium hydroxide tank, and the lithium hydroxide medicine particles can absorb carbon dioxide gas in the air so as to prevent the carbon dioxide gas in the air in the crash submarine from reaching the level threatening the life of personnel and improve the survival conditions of the personnel when waiting for rescue. The military lithium hydroxide granules have high consumption, and if the military lithium hydroxide granules are recycled after use and lithium hydroxide meeting the industrial standard is prepared again, a large amount of resources can be saved, and the economic benefit is improved. Therefore, the research on the recycling treatment process of the used lithium hydroxide granules has important military significance and social benefit.

Disclosure of Invention

In view of the above, the present invention aims to provide a method for recycling lithium hydroxide pellet waste. The lithium hydroxide granules after use can be reused to obtain lithium hydroxide monohydrate meeting the standard, and further used as a chemical raw material for preparing the carbon dioxide absorbent.

In order to achieve the above object, the technical solution of the present invention is as follows.

A recycling treatment method of lithium hydroxide particle waste comprises the following steps:

(1) a waste treatment section: ball-milling, crushing and sieving lithium hydroxide particle waste; then heating in a water bath kettle, stirring and heating, wherein the unreacted lithium hydroxide is dissolved; wrapping the mixed solution with filter cloth, placing the mixture in a centrifuge for filtration, drying a filter cake, collecting the solution, and transferring the filter cake to a lithium hydroxide synthesis working section;

(2) lithium hydroxide synthesis section: the process is a causticization reaction, a filter cake is crushed and sieved, then the filter cake reacts with calcium hydroxide to generate calcium carbonate and lithium hydroxide, a lithium hydroxide filtrate is obtained by separation, and the filtrate enters a lithium hydroxide crystallization working section;

(3) lithium hydroxide crystallization section: and putting the filtrate in a beaker, heating by using an electric furnace while stirring, evaporating water to reach the saturated concentration of the lithium hydroxide, and putting a seed crystal, thus naturally cooling the lithium hydroxide and crystallizing.

Advantageous effects

The method comprises the steps of firstly, Li in the waste material₂CO₃And LiOH, then Li is causticized₂CO₃Conversion to LiOH. H₂O, can realize the preparation of LiOH.H from the waste material of the LiOH tank for the boat₂And O. The lithium hydroxide meeting the industrial standard is prepared again, so that a large amount of resources are saved, and the economic benefit is improved.

Drawings

FIG. 1 is a flow chart of the treatment process of the method of the present invention.

Detailed Description

Example 1:

a recycling treatment method of lithium hydroxide particle waste comprises the following steps:

(1) taking the lithium hydroxide granules, crushing and sieving by a 40-mesh sieve;

(2) mixing 500g of undersize materials with 4kg of distilled water, reacting for 30min at 100 ℃, then filtering the mixed solution through 400-mesh filter cloth, retaining filtrate, and drying filter cakes;

(3) crushing the filter cake, sieving with a 20-mesh sieve, taking 200g of undersize materials, 230g of calcium hydroxide and 4kg of distilled water, stirring and reacting at 100 ℃ for 50min, and filtering to obtain a filtrate;

(4) and (3) heating and evaporating 4.262kg of filtrate obtained in the step (2) and the step (3), adding seed crystals with the theoretical crystallization amount of 40% when the concentration of the lithium hydroxide is 20%, stopping stirring and heating, filtering overnight, and drying the filter cake to obtain the lithium hydroxide monohydrate. The experimental data are shown in the following tables 1-3:

TABLE 1 results of waste treatment section

TABLE 2 results of the lithium hydroxide Synthesis section

TABLE 3 results of lithium hydroxide crystallization section

The lithium hydroxide monohydrate obtained by the waste treatment section, the lithium hydroxide synthesis section and the lithium hydroxide crystallization section meets the GB/T8766-2013 lithium hydroxide monohydrate standard through detection, and can be used as a raw material for production.

In summary, the invention includes but is not limited to the above embodiments, and any equivalent replacement or local modification made under the spirit and principle of the invention should be considered as being within the protection scope of the invention.