High-purity lithium chloride extraction device

Abstract

The invention discloses a high-purity lithium chloride extraction device. The high-purity lithium chloride extraction device comprises a filter press, a blending tank, an extraction system, a washing system, a reverse extraction system, a deironing system and an oil removal system which are sequentially connected through a pipeline, the blending tank is used for acid regulating treatment, and the extraction system, the washing system and the reverse extraction system are respectively formed by connecting multiple stages of centrifugal extractors in series. The reverse extraction solution outlet end of the reverse extraction system is connected with the washing system, the organic phase output end of the reverse extraction system is connected with a saponification system, and the saponification system is connected with the extraction system. A circulating loop is formed by the extraction system, the washing system, the reverse extraction system and the saponification system. The device is further provided with a data analysis system, and the work positions of the abnormal centrifugal extractors can be automatically switched to a standby centrifugal extractor through the system. Variable-frequency closed-loop flow control systems are arranged at the material input ends of all the systems in the circulating loop for obtaining the precise flow-input phase ratio through timely adjustment. The device is high in extraction efficiency, short in phase balance setting time, small in solvent needing amount, low in solvent consumption and continuous and reliable in process.

Description

Technical field [0001] The invention belongs to the field of inorganic salt chemical industry, and specifically relates to an extraction device for high-purity lithium chloride. Background technique [0002] Lithium chloride is mainly used in air conditioner desiccant, bleaching powder, insecticide, synthetic fiber, pharmaceutical industry, lithium battery electrolyte, metal alloy welding agent or flux, and another very important use is to produce metal lithium, lithium It is an urgently needed strategic material for the development of the national economy and the construction of national defense. The only industrial method for producing metal lithium is the lithium chloride molten salt electrolysis method proposed by Gonz in 1893. [0003] At present, China can only produce 99.5% pure lithium chloride. High-purity lithium chloride, such as 99.995% purity, can only be imported from abroad, which severely restricts my country's economic development and progress in aerospace, nationa...

AI Technical Summary

Problems solved by technology

Traditional solvent extraction methods generally use static extraction tanks and extraction chambers as the main extraction tools, which have the following disadvantages: 1. Large solvent demand, high consumption, and high cost; 2. Low extraction efficiency, many stages required, and difficult to obtain purity High product; 3. It takes a long time to establish phase equilibrium, and the extraction process is unstable; 4. The operation and maintenance are cumbersome, with many supporting equipment, high labor intensity, and too large an area, etc.

The above reasons have hindered the popularization and application of solvent extraction in the process of extracting lithium, and also hindered the industrial production of high-purity lithium chloride

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