Method for synthesizing pyrite type iron disulfide through high-temperature and high-pressure secondary reaction and application

Abstract

The invention belongs to the technical field of preparation of functional material blocks, and discloses a method for synthesizing pyrite-type iron disulfide through high-temperature and high-pressuresecondary reaction and application of pyrite-type iron disulfide, which comprises the following steps: doping excessive sulfur powder into iron powder, and heating the mixture at the temperature of more than 300 DEG C under the high pressure of more than 1 atmospheric pressure to obtain a primary reaction product; mixing the primary reaction product with excessive sulfur powder, and carrying outsecondary reaction under the condition that the pressure is greater than 1 atmospheric pressure and the temperature is greater than 400 DEG C, wherein XRD characterization shows that the secondary reaction product is pure-phase pyrite-type iron disulfide. According to the method, the reaction is accelerated by utilizing a high-pressure means, so that the synthesis time of pyrite-type iron disulfide is shortened and the problem that sulfur is difficult to diffuse in iron sulfide is solved by utilizing a secondary reaction means; in addition, generated pollutants are less, the raw materials andthe process are simple, and the purity and the crystallinity of a synthesized product are high.

Description

technical field [0001] The invention belongs to the technical field of functional material block preparation, and in particular relates to a method for synthesizing pyrite-type iron disulfide through high-temperature and high-pressure secondary reaction and its application. Background technique [0002] With the development of modern technology, human beings consume more and more resources, and the conflict with nature continues to intensify. Energy and the environment have become major issues that need to be solved urgently. How to produce and utilize energy more safely and effectively, and how to prevent and control environmental pollution has become a problem that has received widespread attention. As a functional material with a wide range of applications, iron disulfide has received more and more attention in the fields of energy and the environment due to its special properties. In terms of energy, first of all, iron disulfide is widely used in the field of thermal ba...

AI Technical Summary

Problems solved by technology

[0005] (1) The current method of obtaining pyrite-type iron disulfide has high input costs, the extract will also contain impurities of non-sulfur iron elements, and the reagents used in flotation will pollute the environment

[0006] (2) The previous method of obtaining pyrite-type iron disulfide has the problems of relatively harsh synthesis conditions, relatively low synthesis efficiency, low efficiency, and many impurities

[0007] Difficulty in solving the above technical problems: There is a huge demand for iron disulfide in many fields, but the production capacity of iron disulfide limits the development and utilization of this material. Previous people have also explored the use of high-pressure means to produce sulfide, but failed The pure phase of pyrite-type iron disulfide is synthesized. How to synthesize pyrite-type iron disulfide under high pressure has been left to this day.

[0008] Significance of solving the above technical problems: the current means of obtaining iron disulfide are difficult to meet the demand for a large amount of pure-phase iron disulfide in various fields. Therefore, efficient acquisition of pure-phase pyrite-type iron The in-depth development of materials is of great significance

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