Smelting furnace is a necessary equipment in zinc smelting process. To often a smelting furnace maintenance is bare, often need a leakproof work frequently. In order to improve the efficiency of smelting furnace leakproof, my company and the related enterprise collaboration, successfully developed the technology of 20 new smelting furnace. Core product new furnaces leakproof agent for my company independent development. Using new leakproof agent has greatly increased the integrity rate of the equipment, the smelting process for better security.