Casting powder suction gun and automatic slag adding system and method comprising casting powder suction gun

The invention discloses a covering slag suction gun which comprises a slag suction pipe and an air supplementing pipe attached to the upper portion of the slag suction pipe. A slag suction pipe connector is arranged at the tail of the slag suction pipe, and a slag suction opening is formed in the head of the slag suction pipe; the tail of the air supply pipe is provided with an air supply pipe adjusting valve, and the head is an air supply port. The invention further discloses an automatic slag adding system comprising the covering slag suction gun and an automatic slag adding method. According to the invention, various casting powder can be automatically added into the crystallizer by adopting no stock bin or less stock bins. On-site stock bin arrangement is reduced, investment is reduced, the automation degree of a steelmaking site is improved, and labor productivity is improved. 本发明公开了一种保护渣吸枪，包括吸渣管以及贴合于其上方的补气管；所述吸渣管的尾部设有吸渣管连接头，头部为吸渣口；所述补气管的尾部设有补气管调节阀，头部为补气口。本发明还公开了一种包含该保护渣吸枪的自动加渣系统、方法。本发明采用无料仓或少料仓，实现多种保护渣的