There are many unsafe factors in the production of converter. In the smelting process, the medium temperature in the furnace is very high, which is easy to cause high temperature splashing. After cooling and solidification, slag will be formed in the pipeline or cable, which will make the rubber on the outer layer of the pipeline or cable harden, and finally embrittlement and fracture, and then damage the unprotected equipment and cable. The high temperature resistant sleeve coated with multiple silicone rubber can achieve more Heavy safety protection, temperature resistance up to 1650 ℃, can effectively block the splashing of molten iron, molten copper, molten aluminum and other high-temperature molten materials, prevent the surrounding cables and equipment from being damaged, do not need to be replaced frequently, so as to save costs and reduce losses.