Preparation method of carbonyl iron

Abstract

The invention discloses a preparation method of carbonyl iron, and relates to an improvement of a method for preparing carbonyl iron by carbonylation reaction to sponge iron. The carbonyl iron preparation process is as follows: the sponge iron is taken as raw material; and the sponge iron is placed in a reaction kettle to perform reaction with carbon monoxide gas introduced in the reaction kettle. The preparation method is characterized in that the carbon monoxide introduced in the reaction kettle is added with hydrogen. The preparation method of carbonyl iron has the advantages of simple operation, significant effect and easy achievement. Through detection, the reaction speed ratio in the reverse carbonylation synthesis process is obviously changed, and at last the sponge iron carbonylation rate is improved.

Description

Technical field [0001] A method for preparing carbonyl iron relates to an improvement of a method for preparing carbonyl iron by subjecting sponge iron to a carbonylation reaction. Background technique [0002] Currently, the preparation of carbonyl iron The method is usually to react sponge iron with carbon monoxide at a certain temperature. Because of the formation of an oxide film on the surface of the iron crystals in the sponge iron during the reaction, this oxide film hinders the carbon monoxide and iron crystals. Further contact reduces the reaction rate of the carbonylation process, resulting in a reduction in the carbonylation rate, resulting in a reduction in the carbonylation rate of sponge iron during the production process, and increasing production costs. Summary of the invention [0003] The purpose of the present invention is to provide a method for preparing carbonyl iron that can effectively increase the carbonylation rate of sponge iron and reduce the productio...

AI Technical Summary

Problems solved by technology

[0002] Currently, carbonyl iron The method is usually to react the sponge iron with carbon monoxide at a certain temperature, because a layer of oxide film will be formed on the surface of the iron crystal in the sponge iron during the reaction process, and this layer of oxide film hinders the interaction between carbon monoxide and iron crystal Further contact will reduce the reaction rate of the carbonylation process, resulting in a decrease in the carbonylation rate, resulting in a decrease in the carbonylation rate of sponge iron in the production process, increasing production costs