The invention relates to a high-efficiency energy-saving oxidation method of a waste hard
alloy. The method comprises the steps of sorting the waste WC-Co hard
alloy according to differences of Co content, using
aqueous solution which is prepared from
sodium hydroxide with the concentration being 80g.L <-1>, ,
sodium carbonate with the concentration being 30g.L <-1> and
trisodium phosphate with the concentration being 60g.L <-1> to remove impurities and oil on the surface of the waste WC-Co hard
alloy at the temperature of 80 DEG C, conducting oxidation of the hard alloy in the conditions of
oxygen enrichment, rotation, and wetness increasing, specifically, the temperature is 700-1000 DEG C, the time for
thermal insulation is 0.5-6.5 hours and the gas flow speed is 0.1-10.5m3, / h, and the wet oxidizing
atmosphere is used for driving an
injector through a pump to inject water into a
forge at the injection speed of 0.1-300ml / min. The high-efficiency energy-saving oxidation method of the waste hard alloy is easy to operate, short in process, low in
energy consumption, has no specific requirement for production equipment, and can prolong the service life of the equipment; the
recovery rate is high, and by adoption of the method, the prepared
oxide precursor power has good quality, therefore the high-efficiency energy-saving oxidation method of the waste hard alloy has high market application value and economic value, and is suitable for industrial production.