METHOD FOR CRUSHING HARD TUNGSTEN CARBIDE SCRAPS

摘要

Provided are a method for crushing hard tungsten carbide (WC) scraps which is a pre-step of alkaline leaching and acid leaching processes for recycling of tungsten and cobalt, the method including mixing hard tungsten carbide (WC) scraps such as chips, wires, bolts, drills, etc., that are metalworking tools to be discarded after being used, with aluminum, followed by heating to a high temperature, to form an intermetallic compound, metal oxides, or mixtures thereof in a sponge form, and crushing the intermetallic compound, the metal oxides, or the mixtures thereof in a sponge form. Further, provided is a method for recovering tungsten and cobalt from hard tungsten carbide (WC) scrap powder through alkaline leaching and acid leaching methods,

主权项

1. A method for crushing hard tungsten carbide (WC) scraps comprising:
(a) a step of mixing hard tungsten carbide (WC) scraps with aluminum particles; (b) a step of forming an intermetallic compound, metal oxides, or mixtures thereof in a sponge form by heating the mixture obtained from step (a) to 1200 □ to 1400 □ and maintaining the mixture for 30 to 120 minutes; and (c) a step of crushing a product of step (b).