Method for directly preparing anhydrous cobalt chloride powder from cobalt chloride solution

Abstract

A method for directly preparing anhydrous cobalt chloride powder from cobalt chloride solution is characterized by heating air through an air heater to convert the air into hot air, enabling the hot air to enter an atomizing drying chamber in spiral mode under the condition that air inlet temperature of a cyclone in the drying chamber is controlled between 230 DEG C to 280 DEG C, and air outlet temperature of the cyclone in the drying chamber is controlled between 130 DEG C to 200 DEG C, and simultaneously locating the cobalt chloride solution with the cobalt density ranging from 80g / L to 130g / L into a centrifugal atomizer at the top of the atomizing drying chamber in pumping mode to enable the cobalt chloride solution to be atomized into liquid mist drops and contacted with the hot air in parallel flowing mode, so that water in the cobalt chloride solution can be quickly evaporated, and the cobalt chloride solution can be instantaneously dried to be the anhydrous cobalt chloride powder. Atomizing drying equipment is matched with an auxiliary dust collection system to collect product, the atomizing drying chamber, the cyclone separator and the auxiliary dust collection system can be made of corrosion resistant materials. The anhydrous cobalt chloride powder can be collected through the dust collection system made of corrosion resistant materials after being prepared by atomizing and drying the cobalt chloride solution. The method is convenient to operate, large in output, simple in process and capable of both improving product collection rate and reducing production cost.

Description

technical field [0001] The invention relates to a method for directly preparing anhydrous metal salt from metal salt solution, in particular, a method for instantly drying cobalt chloride solution into anhydrous cobalt chloride powder by using spray drying equipment. Spray drying powder is widely used in ceramics, medicine, and non-ferrous metallurgy (such as magnesium chloride powder production, cobalt oxide production) and other industries. Background technique [0002] The conventional preparation method of cobalt chloride powder is: the cobalt chloride solution is concentrated and crystallized into cobalt chloride crystals containing six waters, and then the crystal cobalt chloride is dried and dehydrated into anhydrous cobalt chloride powder. The disadvantages of this preparation method are that the process is long, the cobalt chloride evaporative crystallization and crystal drying and dehydration process takes a long time, the energy consumption is large, the process p...

AI Technical Summary

Problems solved by technology

The disadvantage of this preparation method is that the process is long, the cobalt chloride evaporative crystallization and crystal drying dehydration process takes a long time, the energy consumption is large, the process product is easy to pollute, and the anhydrous cobalt chloride after drying forms hard lumps, which is difficult to sieve

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