Xiamen Tungsten Industry has obtained a patent for a tungsten-cobalt waste residue recycling method

Xiamen Tungsten Industry has obtained a patent for a tungsten-cobalt waste residue recycling method, with a recycling efficiency of up to 95%. Date: December 7, 2023. Source: SMM Tungsten Vision 0. According to the announcement of the National Intellectual Property Administration, Xiamen Tungsten Industry Co., Ltd. has obtained a patent titled "A Method for Recycling Tungsten-Cobalt Waste Residue", with the authorization announcement number CN114921655B and the application date in May 2022. The patent abstract shows that the invention relates to a method for recycling tungsten-cobalt waste residue, including the following steps: mixing the tungsten-cobalt waste residue with water, slurring the mixture, filtering the slurry using a pressure filtration device to obtain filter cake, drying the filter cake using a drying device to remove oil and water, obtaining dried material, crushing the dried material using a crushing device to obtain crushed material, adding the crushed material, water, and alkaline reagent to a slurry tank to obtain a slurry, adding the slurry to a high-pressure oxygen leaching device, heating and pressurizing for reaction, obtaining post-reaction material, separating the post-reaction material using solid-liquid separation equipment to separate the liquid phase and solid phase, adding a reducing agent to the liquid phase, performing ion exchange on the remaining liquid phase after chromium recovery, obtaining tungsten product. This invention can efficiently recover tungsten and chromium from tungsten-cobalt waste residue, with a recovery rate of greater than or equal to 95%, and has excellent recyclability and cost-effectiveness.