A method for eliminating the influence of total reducing substances on appearance in the process of producing calcium chloride by ammonia-alkali method

Abstract

The invention provides a method for eliminating the influence of total reducing substances on the appearance in the process of producing calcium chloride by the ammonia-alkali method. A mixing reactor is connected between the clarification tank containing the high-concentration calcium solution and the calcium solution tank. The high-concentration calcium solution whose total reducing substance content has been measured and the quantitative hydrogen peroxide diluted to a set concentration are stirred and mixed evenly in the mixing reactor. After the reduction of hydrogen peroxide and total reducing substances is completed, it should enter the calcium liquid tank and carry out the subsequent routine production of calcium chloride. The invention provides a method for eliminating the influence of total reducing substances on appearance in the process of producing calcium chloride by ammonia-alkali method, which can remove the appearance of products caused by the corrosion of equipment caused by total reducing substances before producing calcium chloride fixed products Impact.

Description

technical field [0001] The invention relates to the technical field of calcium chloride production, in particular to a process for eliminating the influence of total reducing substances such as sodium sulfide on the appearance of calcium chloride during the production of calcium chloride by an ammonia-alkali method. Background technique [0002] The waste liquid produced by the ammonia-soda method is used as the raw material for the production of calcium chloride. During the production process of the chlor-alkali method, the addition amount of the total reducing substance sodium sulfide may be adjusted, resulting in excessive total reduction content mainly composed of sodium sulfide in the waste liquid. High, it will cause serious corrosion to the calcium liquid carbon steel storage tank above 170°C in the production process of calcium chloride, and the released molten calcium liquid will have black slag, which will affect the appearance of the final calcium chloride produced...

AI Technical Summary

Problems solved by technology

[0002] The waste liquid produced by the ammonia-soda method is used as the raw material for the production of calcium chloride. During the production process of the chlor-alkali method, the addition amount of the total reducing substance sodium sulfide may be adjusted, resulting in excessive total reduction content mainly composed of sodium sulfide in the waste liquid. High, it will cause serious corrosion to the calcium liquid carbon steel storage tank above 170°C in the production process of calcium chloride, and the released molten calcium liquid will have black slag, which will affect the appearance of the final calcium chloride produced and cannot be processed. For normal product sales