At present, there are several main categories of recycling processes for tungsten carbide.One is the so-called high-temperature treatment method, which includes: saltpeter melting method, air oxidation sintering method, oxygen calcination method, etc.;
the other is mechanical crushing method, which includes: Cold crushing method, hot crushing method, zinc melting method, etc.; the third is chemical treatment method, including metal polyvalent salt treatment method, chlorination method, phosphoric acid leaching method, hydrochloric acid treatment method, etc.; the fourth is electrochemical method, including
There are different process routes using alkali as the dielectric, hydrochloric acid or sulfuric acid, and nitric acid as the dielectric; there are also high-pressure oxygen, ammonia or amine solution leaching methods; carbonyl compound methods and steam sublimation tungsten trioxide decomposition methods, etc. In the practice of cemented carbide recycling in recent years, due to increasingly stringent requirements for environmental protection, some recycling processes have been discontinued due to the pollution they cause. At present, the most widely used methods are mechanical crushing method, zinc melting method and electrochemical electrolysis method.
Post time: Jan-04-2024
