Method for extracting metal cobalt and tungsten from scrap hard alloy and special calcining device

Abstract

The invention discloses a method for extracting metal cobalt and tungsten from a scrap hard alloy and a special calcining device, belonging to the technical field of recovery of the scrap hard alloy. The method comprises the following steps of: placing the scrap hard alloy into a hydrogen environment inside a tubular calcining furnace, and calcining at the temperature of 1700-1750 DEG C; then separating powder through crashing and ball-milling; and then extracting the metal cobalt and the metal tungsten by using a chemical method. In an extraction process of the metal cobalt and the metal tungsten, the scrap hard alloy is firstly calcined so that it is extremely easy to obtain the powder through the ball-milling, and the efficiency of extracting the metal cobalt, the metal tungsten and other metal elements by utilizing the scrap hard alloy is greatly enhanced.

Description

technical field [0001] The invention belongs to the technical field of recovery and reuse of waste cemented carbide, and in particular relates to a method for extracting metal cobalt and tungsten from waste cemented carbide and a special calcining device. Background technique [0002] With the rapid development of the economy, industries such as machinery manufacturing, geological mining, construction, electronics and chemical industry have an increasing demand for tungsten and cobalt materials that constitute the main elements of cemented carbide. As rare elements, tungsten and cobalt have very little ore reserves, and mining is becoming more and more difficult. Therefore, the recovery, extraction and reuse of tungsten and cobalt element materials in waste cemented carbide is becoming more and more important. [0003] At present, the process of extracting metal cobalt and tungsten from waste cemented carbide includes classifying, crushing, ball milling, and electrolyzing t...

AI Technical Summary

Problems solved by technology

This extraction method is to extract metal cobalt and tungsten by directly crushing waste cemented carbide, ball milling to obtain cemented carbide powder, and then extract metal cobalt and tungsten through chemical extraction. method to obtain powder, its low efficiency can be imagined, generally a production cycle is at least 20 days

In addition, metal cobalt and metal tungsten can also be extracted by directly electrolyzing waste cemented carbide, but the electrolysis of waste cemented carbide has high energy consumption and is caused by the volatilization of the electrolyte and the removal of the electrolyte during the electrolysis process. The defect of environmental pollution; in addition, 10-15% metal cobalt and metal tungsten are dissolved in the electrolyte and discharged as waste liquid, so there is also the problem of low recovery rate of metal cobalt and tungsten

[0004] In addition, in the above-mentioned process of extracting rare metals from waste cemented carbide, the calcination furnace used is only provided with a common discharge port and discharge port due to the composition of the calcination chamber, so the calcination of cemented carbide can only It is a furnace-by-furnace firing, that is, adding a certain amount of waste cemented carbide material to the furnace at one time, then heating and calcining, cooling and taking the material, and then adding the material to the furnace and then calcining and cooling to take the material, so the use of The furnace body has the problems of low efficiency and waste of heat energy for calcination of waste cemented carbide

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