Method for vulcanization, reducing oxidation and enrichment of low-grade material containing arsenic, indium and germanium

Abstract

The invention relates to a method for the vulcanization, the reducing oxidation and the enrichment of a low-grade material containing arsenic, indium and germanium. The method comprises the following steps: compounding a certain amount of coal dust in a raw material containing indium, germanium, lead, zinc and arsenic as a reducer; meanwhile, adding elemental sulfur and a caking agent for briquetting by the weight ratio that the raw material containing the indium, the germanium, the lead, the zinc and the arsenic to lime to sulfur is equal to 100:20-40:5-10:2-4; making the material into a coalball or briquette shape, vulcanizing and volatilizing in a shaft furnace; controlling temperature to be below 1000 DEG C to 1200 DEG C and vulcanization volatilizes time to be from 1 hour to 3 hours under a certain oxidation reduction atmosphere, and the content of the lead and the zinc in slag to be less than 2 percent, and decreasing the content of the indium and the germanium to be 30 to 300 g / ton; leaching flue dust when a sulfur terminal has a pH value of 0.5 and replacing zinc powder for leaching liquid into indium-germanium concentrate ore. The method can take lower production cost to enrich valuable metals, such as indium, germanium, lead, zinc, silver and the like without drainage, the germanium, the indium and the zinc obtained in the flue dust can be leached by 95 percent when the pH value is 0.5, hydrogen arsenide can be separately treated, and the valuable metals of the lead, the zinc and the silver can be fully recycled.

Description

【Technical field】 [0001] The invention belongs to the technical field of extraction and enrichment of non-ferrous scattered metal indium germanium low-grade materials, and relates to a method of separating arsenic from low-grade materials containing arsenic, indium and germanium, and enriching valuable metals such as arsenic, indium and germanium at the same time, so as to The sulfidation and reduction oxidation enrichment method of low-grade materials containing arsenic, indium and germanium, which are used to extract valuable metals in subsequent processes. 【Background technique】 [0002] Explanation of the name: The scientific name of P204 is di-isooctyl phosphate, which is a phosphorus-type acidic extractant. Printing and dyeing, petrochemical wastewater treatment and other industries can also be used as raw materials for wetting agents and surfactants. [0003] At present, the extraction process of low-grade scattered metal indium is directly leached with sulfuric acid...

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Problems solved by technology

[0003] At present, the extraction process of low-grade scattered metal indium is directly leached with sulfuric acid, and then enriched with P204 extraction or neutralization precipitation (or replacement), which will generate a large amount of waste water, and for some materials that are difficult to leach There are problems such as insufficient extraction, high extraction cost, and waste of other metals that are difficult to recycle.

[0004] The extraction of low-grade scattered metal germanium is mainly acid leaching, then tannin extract germanium, and the germanium slag is roasted to obtain high-grade germanium concentrate, and the germanium concentrate is then chlorinated and distilled to extract germanium dioxide, so that there will be The problem of long process, low recovery rate and large amount of wastewater

[0005] When the material contains arsenic, it will be difficult to remove arsenic, and the highly toxic gas of arsine hydrogen will be produced, and the arsenic slag produced will not be easy to handle.

[0006] The above-mentioned traditional extraction and enrichment process of low-grade materials of non-ferrous scattered metal indium and germanium has a high production cost for every ton of material processed, and at the same time, 5 tons of waste water containing very high concentrations of acid and arsenic must be discharged. In addition, other Valuable metals lead, zinc, and silver are also difficult to recycle

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