This type of furnace is a natural gas horizontal melting furnace used for melting and insulation refining various alloy parts and aluminum ingots before die-casting. Connected to the combustion automatic control system, automatic lifting feeder, automatic liquid outlet device, and PLC program controller of the tunnel furnace. The temperature and mechanical actions of the furnace can be automated through program operation. Referring to the basic structures of natural gas melting aluminum furnaces and natural gas crucible free insulation furnaces, combined with our company's years of experience in designing, manufacturing, and using natural gas furnaces for customers, we have reasonably selected the internal pouring layer and insulation layer material thickness to achieve the goal of high-strength non stick aluminum lining and energy-saving outer lining. The fuel price is low, the production cost is low, and the benefits are good; Adopting imported burners, it consumes less fuel, saves energy in tunnel furnaces, reduces production costs, improves economic benefits, and can automatically adjust the flame size and ignition according to the furnace temperature. The operating conditions are good, achieving automatic control; Adopting an electric hydraulic device to tilt the furnace body for automatic liquid discharge; Large aluminum melting capacity, each furnace can melt 3 tons of aluminum ingots, high production efficiency