On November 13, good news came from the China National Intellectual Property Administration，Fangda Carbon《A combined carbon brick device for tapping holes》It has been granted the utility model patent by the China National Intellectual Property Administration.
       The iron mouth of a submerged arc furnace is a very important structure inside the furnace. The iron mouth needs to withstand thermal radiation and convection, wear and tear of the descending material flow, erosion of the airflow, splashing of slag and iron, and dissolution of the iron flow. The existing iron mouth bricks are prone to oxidation, fracture, and other problems during use, requiring long-term shutdown for maintenance, complex and time-consuming processes, which cannot meet the service life and quality requirements of the submerged arc furnace, and have low production efficiency. This utility model provides a combined carbon brick device for the iron outlet, which has the advantages of good thermal shock resistance, corrosion resistance, erosion resistance, oxidation resistance, etc. It solves the problems of oxidation and fracture of carbon bricks at the iron outlet of a submerged arc furnace, and greatly improves the service life of the submerged arc furnace. The patent technology of this utility model has a stable and novel structure, a unique design, which not only improves the service life of the submerged arc furnace, but also improves the production quality, efficiency, and comprehensive performance of the submerged arc furnace. (Kang Xiuling, Wang Lan)