Atomization and pyrolysis equipment for carbonyl iron powders

Abstract

The invention discloses an atomization and pyrolysis technology for carbonyl iron powders and is characterized in that atomization and pyrolysis equipment comprises a pentacarbonyl iron storage device, a pyrolysis device, a collecting device and an after-treatment device sequentially connected together, wherein an atomizing nozzle device is arranged at the top inlet of the pyrolysis device. The atomization and pyrolysis equipment is designed based on the liquid atomization and vaporization pyrolysis theory, and the evaporator required by the traditional vaporization pyrolysis technology is eliminated, so that the problem of frequent cleaning of the vaporizer in the production process is fundamentally solved. The atomization and pyrolysis technology has the characteristic of high operating flexibility, and can realize the purpose of randomly controlling the shape and grain size of the powder through adjustment of technological parameters, which cannot be realized in the traditional process.

Description

technical field [0001] The invention relates to a device and technology for spraying liquid pentacarbonyl iron into a pyrolysis device for pyrolysis in an atomized form to prepare carbonyl iron powder, belonging to the technical field of chemical industry, and in particular to a carbonyl iron powder atomization pyrolysis equipment. Background technique [0002] As a basic material with special properties, carbonyl iron powder is widely used in metallurgy, chemical industry, electronics, military and other fields. The preparation process is that sponge iron and carbon monoxide gas synthesize iron pentacarbonyl under high temperature and high pressure, and iron pentacarbonyl is heated and decomposed under special conditions to produce carbonyl iron powder and carbon monoxide. The prepared carbonyl iron powder has a wide range of practicability because of its small particle size, high iron purity, spherical appearance, and excellent electronic properties. [0003] In the prepa...

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Problems solved by technology

[0003] In the preparation process of the existing carbonyl iron powder, it is necessary to vaporize the iron pentacarbonyl passing into the pyrolysis reactor at high temperature. Because the decomposition temperature of iron pentacarbonyl is 58°C and the boiling point is 104°C, the iron pentacarbonyl is in the vaporization process. A large amount of decomposition will form scars on the evaporator that need to be cleaned, block the pipeline, affect the operating cycle and cause accidents, and the decomposition of iron pentacarbonyl also causes a lot of waste

Frequent shutdowns to clean the evaporator cause repeated system switching and process fluctuations, making the pyrolysis process unable to proceed under constant temperature and conditions, resulting in excessive product particle size and reduced product purity and quality

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