Flotation type tungsten raw material extraction all-wet-process smelting process

Abstract

The invention relates to the technical field of metallurgical chemical industry, and provides a flotation type tungsten raw material extraction all-wet-process smelting process. The process comprises the steps of leaching, solid-liquid separation, purification, sulfuration, acid regulation and molybdenum removal, extraction, reextraction and crystallization to produce an ammonium paratungstate product, wherein the leaching process comprises the following steps of uniformly mixing the flotation type tungsten raw material with a leaching agent, water and / or washing water and a defoaming agent in a leaching reactor, and leaching for 0.1-8 hours at the temperature of 100-250 DEG C to obtain mixed slurry of a sodium tungstate solution and leaching residues; and the defoaming agent comprises one or more of an organic silicon defoaming agent, castor oil, aldehydes, alcohols, ketones, kerosene and tertiary amine. The defoaming agent is added in the leaching process, so that the influence of a surfactant in the sodium tungstate solution on the production process can be effectively inhibited, the feed liquid conveying time is effectively shortened, a better solution purification effect is obtained, a high-quality ammonium paratungstate product is obtained, and production accidents can be reduced.

Description

technical field [0001] The invention relates to the technical field of metallurgy and chemical industry, in particular to a flotation-type tungsten raw material extraction full-wet smelting process. [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. [0003] The term "regeneration" refers to the ionization of the extractant in the acid. [0004] The term "loaded" means that the tertiary amine in the extracted organic phase is regenerated with sulfuric acid and exists in the form of tungstate. [0005] The term "unloaded" means that the tertiary amine i...

AI Technical Summary

Problems solved by technology

The disadvantage of the prior art 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, thereby causing huge environmental risks, especially the random mixing of multiple batches of tungsten mineral raw materials during the roasting process ( Due to the small output and high price of tungsten, tungsten mineral raw materials are usually 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, the leaching agent is usually excessively mixed in production, which causes the leaching agent to be wasted. What's more, the roasting process leads to a large loss of tungsten mineral raw materials, 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%

Even after roasting, there may still be surfactant residues due to poor roasting effect, such as abnormal feeding rate, temperature fluctuation, insufficient time, etc.

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