The newly designed natural gas-heated aluminum brazing furnace uses natural gas as the heating energy source, which is more energy-efficient. It combines gas combustion heating technology with a protective atmosphere brazing process. With the advanced control system, it is safer and more convenient to use. It is specially designed for efficient welding of aluminum products.
Furnace Structure Introduction
The natural gas-heated aluminum brazing furnace consists of a liquid storage tank, brazing flux spray and dryer, drying furnace, antechamber, brazing furnace, water cooling chamber, rear chamber, air cooling chamber, transmission, electrical controls for each section, and air intake and exhaust ducting.
Heating Furnace Body
The brazing furnace heating body is a rectangular parallelepiped welded from steel sections and plates. A long furnace core made of 314 stainless steel is placed within the furnace chamber. Heating elements are located on the upper and lower sides of the furnace core. Insulation material is used between the furnace chamber and the shell.
The water cooling jacket consists of two layers. The inner layer is welded from 1Cr18Ni9Ti and the outer layer is a water trough made from 4mmA3 iron plate. The three sections of the water trough are connected by 2-inch steel pipes and are cooled by circulating water using a high-pressure water pump.
The heating furnace body is connected to the water cooling jacket. A mesh belt passes through the furnace chamber. Driven by a rotating mechanism, the mesh belt feed port moves toward the water cooling jacket feed port.
Furnace Tubes
The furnace tubes consist of a feed pipe and a discharge pipe, both welded into a horseshoe shape from stainless steel plates. The inner corners are welded with angled stainless steel to reduce wear.
The feed pipe is installed at the front end of the furnace. An ignition nozzle is installed on its top for monitoring the furnace atmosphere and burning off exhaust gases.
The discharge pipe is installed at the rear end of the kiln. An air inlet is installed on its top for supplying air to the furnace. The air supply is controlled by a ball valve, and a flow meter indicates the flow rate. Because the temperature of the workpieces leaving the kiln is relatively high, the discharge pipe features a double-layer structure with a built-in water cooling chamber to accelerate cooling. Water enters the lower chamber and exits the upper chamber.
A feed door is installed at the front (side) of the feed pipe and a discharge door at the end of the discharge pipe, respectively. Both doors are equipped with flame curtains to prevent air from entering the furnace when the doors are open.
