Synthesis of active ferrous sulphide and uses thereof

Abstract

The invention provides a method for synthesizing active ferrous sulfide and application thereof. The invention belongs to the field of non-ferrous metallurgy, and relates to the synthesis of the active ferrous sulfide and application by using the active ferrous sulfide to precipitate nickel sulfide from a nickel-containing water solution. The method comprises that: the iron powder or / and nickel-iron powder is mixed with sulfur powder according to the mol ratio of metal iron to sulfur in the iron powder of 1:1-1.5, added with water for wetting, placed in a stirring reactor for heat-stirring reaction, cooled down, filtered to obtain the active ferrous sulfide, of which the main content of FeS reaches 75 percent and the average particle diameter is between 5 and 20mu m; and the active ferrous sulfide is added to a water solution of nickel-containing sulfate or chloride and subjected to heat-stirring reaction so as to precipitate the nickel sulfide. The active ferrous sulfide synthesized by the method has the advantages of high chemical activity, simple synthetic process and high production efficiency, and can be used to produce nickel salt or electronic nickel; and the method is an effective method for separating and recovering nickel from the nickel-containing solution.

Description

technical field [0001] The invention belongs to the field of nonferrous metal metallurgy, and relates to the synthesis of active ferrous sulfide and the application of the active ferrous sulfide to precipitate nickel sulfide from nickel-containing aqueous solution. Background technique [0002] The synthesis methods of ferrous sulfide include high temperature direct synthesis and liquid phase synthesis. The high-temperature direct synthesis method is obtained by mixing iron powder and sulfur in a certain proportion and directly reacting at high temperature. Wang Yunru et al. disclosed a high-temperature direct synthesis method in the fifth issue of "Journal of Wuhan Institute of Chemical Technology" in 2005. The process is: Iron powder and sulfur powder are mixed according to the ratio of iron to sulfur mass ratio of 7:4.2, put into a high-vacuum sealed quartz tube, heated and synthesized at 1000°C for 24 hours, and cooled to obtain a brittle ferrous sulfide solid. High-tem...

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Problems solved by technology

The above two methods can precipitate and recover nickel from nickel-containing solutions such as nickel hydrometallurgical solution, nickel or nickel alloy electroplating waste solution, nickel-containing leaching solution, etc. The recovery rate of nickel is high, and the process and operation of the neutralization precipitation method are simple, but the solution contains When the impurities are high, the selectivity is poor, iron and other heavy metal impurities in the solution will precipitate together with nickel, the alkali consumption is large, and the recovered nickel hydroxide or nickel carbonate has low purity

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