A system for automatic control of lithium washing process using conductivity meter

Abstract

The invention provides a system for realizing the automatic control of the lithium washing process by using a conductivity meter, including a conductivity meter, the conductivity meter is installed on the outlet pipeline of the lithium ion adsorption tower, and is used to detect the lithium ion adsorption tower The conductivity of the lithium eluate in the medium. The invention adopts the automatic detection of the conductivity meter, improves the accuracy of detection and production efficiency, overcomes the trouble of each step of assay analysis and waste of time, and reduces the loss of lithium ions; adopts the decentralized control system DCS, according to the conductivity meter The displayed data remotely controls the opening / closing of the valve during the lithium washing process, improves the automation of the lithium washing process, and realizes large-scale automated production; the system can run stably for a long time, has a high level of automation, simple operation, strong safety, and economic benefits.

Description

technical field [0001] The invention relates to the field of automatic control, and more particularly, relates to a system for automatic control of a lithium washing process. Background technique [0002] my country's lithium resource content ranks among the top in the world, but more than 80% of it is stored in my country's salt lake brine resources, accounting for 1 / 3 of the world's total lithium reserves in salt lakes, and the salt lake brine has a high ratio of magnesium to lithium, which brings relatively high pressure for lithium extraction. Big difficulty. The methods that can be used to extract lithium from salt lakes have been developed, including precipitation method, evaporation crystallization method, calcination and salting out method, ion exchange adsorption method and solvent extraction method. The ion-exchange adsorption method refers to the selective adsorption of lithium in high-magnesium-low-lithium brine (magnesium-lithium ratio of 500:1 or higher) by lit...

AI Technical Summary

Problems solved by technology

However, because the ion exchange adsorption process is a new process, the quality monitoring method is single and the degree of automation is low, especially the process control of the lithium washing process, there are the following problems:

There are a lot of equipment in the adsorption tower area, each tower has twelve control valves, and the number of towers is hundreds, which requires a large number of personnel to operate on site

[0005] 2. During the lithium washing process, the amount of magnesium ions contained in the lithium eluate is measured through laboratory analysis to determine whether the subsequent qualified liquid can meet the index requirements. In order to ensure the normal process, multiple sampling measurements are required, which will increase manpower and waste. A lot of time, reduce efficiency

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