High-temperature fire protection bushings, mainly from high-purity non-alkali glass fiber composite organic silica gel after weaving and coating. Depending on the heat resistance of the materials used, for steel plants, coking, military, automobile and other places where there is high-temperature environment cable protection, fire jacket is a relatively high cost-effective products. As we all know, the coking plant is specialized in metallurgical coke production and smelting coking products, processing, recycling of professional plants, so there are many high-temperature environment site, for example, “Four carts”, Push Coke car, block coke car, coke quenching car and coal truck, there are many exposed near the surface of the cable, pipes. During the working process of the four carts, it is very easy to have high-temperature spatter falling on it, causing cable damage and endangering workers’ lives. The fire-proof casing is specially used for cable protection, which can insulate wear-resisting and anti-voltage while playing a protective role. It is a high-quality choice for safety protection products in coking plants.