Oxygen-enriched decomposition process of tungsten raw material

Abstract

The invention discloses an oxygen-enriched decomposition process of a tungsten raw material, and relates to the technical field of ammonium paratungstate .The oxygen-enriched decomposition process comprises the following steps: S1, mixing a flotation type tungsten raw material, a leaching agent, water and / or washing water to obtain leaching slurry; and S2, introducing oxygen-enriched gas into the leaching slurry, wherein the oxygen-enriched gas and the leaching slurry react, and after the reaction is finished, obtaining mixed slurry of a sodium tungstate solution and leaching residues, wherein the oxygen-enriched gas is gas with the oxygen volume percent content being greater than 20.9%. The method has the beneficial effects that the oxygen-enriched gas is added in the leaching process, so that the surfactant in the raw materials can be effectively removed in the leaching process, the influence of the surfactant on the production process is overcome, the production process is energy-saving and environment-friendly, the economic benefit is good, industrialization is extremely easy to realize, and the quality of ammonium paratungstate can be improved.

Description

technical field [0001] The invention relates to a production process of ammonium paratungstate, in particular to an oxygen-enriched decomposition process of tungsten raw materials, belonging to the field of metallurgy and chemical industry. [0002] In this specification, the term "flotation-type tungsten raw material" refers to tungsten mineral raw material suitable for smelting obtained by flotation. Flotation is a beneficiation method, which refers to the beneficiation process of floating solid minerals from the water suspension (ore slurry) according to the differences in the physical and chemical properties of the mineral surface. Flotation-type tungsten raw materials include scheelite, tungsten slime, etc. Background technique [0003] Tungsten is a refractory non-ferrous metal, which is widely used because of its high melting point, high hardness, strong ductility, wear resistance and corrosion resistance. Two-thirds of the total tungsten resources in my country are...

AI Technical Summary

Problems solved by technology

The disadvantage of the existing technology is that the high temperature of the roasting process leads to high energy consumption, high labor intensity and poor working environment, and produces a large amount of roasting smoke that is difficult to control, resulting in huge environmental risks, especially the random mixing of multiple batches of tungsten mineral raw materials during the roasting process. Due to the small output of tungsten and the high price, tungsten mineral raw materials usually come in batches of ten tons, and the tungsten content varies greatly between batches, resulting in unclear grades of tungsten mineral raw materials entering the smelting process during leaching, which seriously affects subsequent ingredients. , leaching and other operating processes; in order to ensure the leaching rate of tungsten mineral raw materials, an excessive amount of leaching agent is usually added in production and the leaching agent is wasted, and what’s more, the roasting process leads to a large amount of tungsten mineral raw material loss, resulting in great losses. Waste of resources, poor economy, according to production experience, the tungsten loss rate caused by the roasting process of tungsten mineral raw materials in the prior art is about 2.5%

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