[Chemical Knowledge]：Production and manufacturing method and process of lithium carbonate

The manufacturing method
of lithium carbonate
1. Overview

Lithium carbonate is an important chemical raw material, widely used in batteries, ceramics, glass and other fields. With the continuous development and application of science and technology, the manufacturing method of lithium carbonate is constantly improved and optimized. This article will introduce several common lithium carbonate manufacturing methods.

2. Manufacturing Method

1. Ore Method
Ore Method is a common lithium carbonate manufacturing method, mainly using lithium ore as raw material, through crushing, grinding, leaching, purification, precipitation and other processes, the production of lithium carbonate products. The specific process flow is as follows:
(1) Lithium ore crushing and grinding
After the lithium ore is crushed to a certain particle size, it is added to a ball mill for grinding, so that the lithium minerals in the ore are exposed, which is convenient for subsequent leaching reaction.
(2) Leaching
The ore after grinding is added to a leaching agent such as sulfuric acid or hydrochloric acid, and the leaching reaction is carried out at a certain temperature to convert the lithium mineral into a soluble lithium salt.
(3) The purification
removes impurity ions, such as iron, magnesium, calcium, etc., from the leaching solution by adding a precipitant and adjusting the pH value.
(4) Precipitation
A precipitant such as sodium carbonate or sodium hydroxide is added to the purified leachate to convert the lithium salt into lithium carbonate precipitate, and the lithium carbonate product is obtained through processes such as filtration, washing, and drying.

2. Salt Lake Method
The salt lake method is a method of using salt lake brine resources to produce lithium carbonate. The specific process is as follows:
(1) brine collection
collects brine containing lithium from the salt lake.
(2) impurity removal
remove impurity ions in brine, such as sodium, potassium, magnesium, etc., by chemical or physical methods.
(3) Precipitation
A precipitant such as sodium carbonate or sodium hydroxide is added to the purified brine to convert the lithium salt into lithium carbonate precipitate, and the lithium carbonate product is obtained through processes such as filtration, washing, and drying.

3. recycling method
recycling method is a method of using waste batteries, catalysts and other lithium-containing waste as raw materials to produce lithium carbonate. The specific process flow is as follows:
(1) waste crushing and classification
Crushing and classifying lithium-containing waste such as waste batteries and catalysts to obtain lithium-containing components.
(2) Acid leaching
The lithium-containing component is added to a leaching agent such as sulfuric acid or hydrochloric acid, and the leaching reaction is carried out at a certain temperature to convert lithium into a soluble lithium salt.
(3) Purification
The impurity ions in the leachate are removed by adding a precipitant and adjusting the pH value.
(4) Precipitation
A precipitant such as sodium carbonate or sodium hydroxide is added to the purified leachate to convert the lithium salt into lithium carbonate precipitate, and the lithium carbonate product is obtained through processes such as filtration, washing, and drying.

3. manufacturing equipment

In the manufacturing process of lithium carbonate, it is necessary to use equipment such as crushers, ball mills, leaching tanks, reactors, filters, dryers, etc. The selection and configuration of these equipment should be determined according to the specific production process and output to ensure production efficiency and product quality.

4. production environment and safety measures The production process of

lithium carbonate involves chemical reactions and high temperature and high pressure operations. Therefore, it is necessary to keep the production environment clean and dry, and strictly implement the safety operation procedures. At the same time, effective fire prevention and explosion prevention measures should be taken to ensure production safety.

5. quality control and testing means

In order to ensure the quality of lithium carbonate products is stable and reliable, it is necessary to establish a perfect quality control system and testing means. Through the quality of raw materials, production process monitoring and product quality testing, to ensure that products meet the relevant standards and requirements. Summary and Prospect of

6.

lithium carbonate as an important raw material for chemical production, its manufacturing method is continuously improved and optimized, which improves production efficiency and product quality. In the future, with the continuous progress and application of science and technology, the manufacturing method of lithium carbonate will be more environmentally friendly, efficient and energy-saving.