A method for improving the hardness of spherical calcium chloride produced by acid calcium method

Abstract

The invention provides a method for improving the hardness of spherical calcium chloride produced by the acid calcium method. The process for producing spherical calcium chloride by the acid calcium method includes a calcium acid reaction process and a double-effect evaporation process in which hydrochloric acid reacts with limestone to form a calcium chloride solution. , dust removal process, evaporation calcium production process and granulation process, before the acid calcium reaction process, there is also a mixing process, in the mixing process, limestone and sodium chloride solid particles are mixed and then sent to the acid calcium reaction process, adding hydrochloric acid, Generate a calcium chloride solution containing sodium chloride, and then enter other processes in sequence to finally generate spherical calcium chloride particles.

Description

technical field [0001] The invention relates to the production technical field of calcium chloride, in particular to a production method of spherical calcium chloride. Background technique [0002] In the prior art, the calcium chloride produced by the calcium acid method has low hardness and low density. It is necessary to add sodium chloride during the production process to make the hardness and bulk density of the spherical calcium chloride bidirectional. Therefore, controlling the content of calcium chloride in spherical calcium chloride is an important indicator to control the hardness of the product and reduce the amount of powder in the product. In the production process of the existing conventional spherical calcium chloride, the hardness of the final product is usually improved by increasing sodium chloride in the dust removal process, but the calcium chloride content in the calcium chloride solution generated by the calcium acid reaction is generally about 37%. Th...

AI Technical Summary

Problems solved by technology

In the production process of the existing conventional spherical calcium chloride, the hardness of the final product is usually improved by increasing sodium chloride in the dust removal process, but the calcium chloride content in the calcium chloride solution generated by the calcium acid reaction is generally about 37%. The same ion effect of chloride ion, sodium chloride solid is difficult to dissolve in this calcium chloride solution, in order to improve the content of sodium chloride in the final product, increase the sodium chloride content in the calcium chloride solution, just need to chlorine Warming the calcium chloride solution and adding a large volume of dissolving equipment, by prolonging the dissolution time for 4-8 hours to fully dissolve the added sodium chloride solid in the calcium chloride solution, resulting in a longer production cycle, production costs and equipment repair costs rise

Images