H-type wheel paying off the steel wire (petal basket type) ->ultrasonic cleaning->assist galvanizing->inner heating hot galvanizing furnace->H-type wheel taking up the steel wire (invertedtype) The ultrasonic technology is successfully applied in the production line of hot galvanizing steel wire, instead of the traditional cleaning technology of degreasing and acid washing. Inner heating hot galvanizing furnace This furnace is composed by the pot, ceramic heater and temperature control system. The pot is made of three layers of heat preservation materials and the frame of pot. Its exterior is that the mouth of pot is designed flat ultrasonic cleaning the surface of wire before galvanizing. inner heating hot galvanizing furnace surface, the heater is vertically and uniformly fixed. Thus the temperature of zinc liquid is equally and convenient for operating and maintaining. The production efficiency is increased. The operation is on the safe side. Excellent features 1. The cannula of inner heater is made from compound ceramic material. It is provided with much excellent features, such as fine thermal conductivity, high strength, anti-impact, anti-scour, high temperature-resistant, corrosion resistant and etc. 2. Fine thermal stability of galvanized pot. The lifetime is long. 3. Lower consumption of energy. The power consumption is about 180 kWH. 4. Fine efficient in preserving heat, galvanized pot is provided three layers of heat preservation materials. 5. Melting zinc and solidifying zinc are conveniently. Heater can directly heating and melting zinc. Melting is rapidly. There is little Zn ash. It is directly solidifying zinc.