METHOD FOR MANUFACTURING HARDMETAL PARTS FOR DRILLING BIT OF TAP HOLE ON BLAST FURNACE BY USING HARD METAL SCRAP AND HARDMETAL PARTS THEREFROM

摘要

The present invention relates to a cemented carbide part for an open air bit for a blast furnace using a cemented carbide scrap and a manufacturing method thereof. The method for manufacturing cemented carbide parts for open air bits using the cemented carbide scrap of the present invention comprises the steps of selecting and cleaning cemented carbide scraps, scrap crushing for effective zinc infiltration, zinc infiltration and zinc recovery of cemented carbide scrap, Milling, sieving of the reclaimed cemented carbide powder, wet mixing and drying of the reclaimed cemented carbide powder, molding and sintering.