Functions and Usage of Carbide Drill Bits​

Carbide drill bits are core drilling tools for blast furnace tapping and metallurgical drilling operations. With ultra-high hardness, excellent wear resistance and high temperature resistance, they are widely used for opening, reaming and hole cleaning of blast furnace tapholes in steel plants. Compared with ordinary steel drill bits, carbide drill bits feature stronger impact resistance. Under harsh working conditions with high temperature, high hardness furnace materials and strong impact force, they are not easy to break or wear. They can effectively reduce drilling resistance, improve blast furnace tapping efficiency, and greatly lower the cost caused by frequent bit replacement and production shutdown maintenance.​
In daily blast furnace production, carbide drill bits are mainly matched with blast furnace tapping machines and hydraulic drilling rigs. Combined with special blast furnace drill rods and couplings, they form a complete drilling system to quickly drill taphole clay and furnace lining materials. They are suitable for new blast furnace hole opening, daily taphole dredging, old hole diameter expansion and repair, as well as furnace residue cleaning. The bits maintain stable drilling speed and long service life, ensuring continuous, stable and safe production of steel mills.​
Correct usage can maximize the performance and service life of carbide drill bits. First, select the appropriate tooth type according to the hardness of the furnace taphole and taphole clay. 3-wing and 4-wing carbide drill bits are suitable for most metallurgical blast furnaces. Second, ensure firm connection and accurate coaxiality between the drill bit and drill rod during installation to avoid tooth breaking, hole deviation and rod fracture caused by eccentric rotation. Keep uniform feeding speed during drilling, avoid forced pressurization and violent drilling, and ensure ventilation and slag removal to prevent jamming and high-temperature ablation of alloy teeth. Clean residual slag and check tooth wear after operation, and store properly to reduce loss and improve long-term working efficiency.​
Our factory’s blast furnace carbide drill bits adopt high-quality tungsten carbide teeth and high-grade alloy steel body, processed by precise forging, heat treatment and CNC finishing. Featuring high temperature resistance, impact resistance and wear resistance, they are compatible with various domestic and imported blast furnace tapping equipment. Custom specifications are available to provide cost-effective overall drilling solutions for metallurgical enterprises at home and abroad.