Method for preparing carbonyl iron

Abstract

The invention discloses a method to prepare carbonyl iron, which relates to a method to synthesize carbonyl iron with sponge iron as raw material. The invention is characterized in that preparation process is that: the sponge iron to be synthesized and reacted to generate carbonyl iron is made into sponge iron spherical particles and carbonylation synthesis is carried out after the sponge iron spherical particles are reduced and activated by hydrogen. The sponge iron is subject to a series of activation process such as compression, prereduction by hydrogen during the synthesis process of carbonyl iron in the method of the invention, thereby greatly reducing carbonylation pressure of sponge iron, maintaining the synthesis process of carbonyl iron to be carried out in middle pressure, decreasing production cost of carbonyl iron synthesis, lowering control requirement of carbonyl iron production technology for equipment and valves and improving the reaction speed and production efficiency of carbonyl iron industrial production.

Description

technical field [0001] A method for preparing carbonyl iron relates to a method for synthesizing carbonyl iron by using sponge iron raw materials. Background technique [0002] The basic principle of carbonyl iron synthesis is that sponge iron and carbon monoxide react under certain temperature and pressure to form carbonyl iron. At present, the main process for producing carbonyl iron in the world is a high-pressure process. Although there are some medium-pressure processes for producing carbonyl iron, most of the medium-pressure carbonylation reactions for producing carbonyl iron are immature, and the reaction rate is too low. Industrial production has no practical significance. . Due to the high pressure of high-pressure synthesis of iron carbonyl, the equipment loss is very large, and the valve replacement rate of key parts in the reaction process is very high. In addition, the high-pressure reaction also brings many hidden safety hazards. At the same time, the producti...

AI Technical Summary

Problems solved by technology

Due to the high pressure of high-pressure synthesis of iron carbonyl, the equipment loss is very large, and the valve replacement rate of key parts in the reaction process is very high. In addition, the high-pressure reaction also brings many hidden safety hazards. At the same time, the production of the high-pressure process will also pollute to a large extent. surroundings

Therefore, the carbonyl iron high-pressure production process has many technological disadvantages