Aluminum material is a lightweight, corrosion-resistant, excellent thermal conductivity, good electrical conductivity and highly reflective metal material. And aluminum alloy melting furnace is a kind of equipment for melting aluminum alloy, and its structure includes furnace body, combustion system, cooling system and control system and other parts.

Classification of Melting Furnaces

• According to different heating energy, it can be divided into fuel heating type and electric heating type.
• According to the flue gas waste heat utilization device is different, can be divided into thermal storage type, lead injection type and flue gas / combustion air convection preheating type.
• According to the role of different, can be divided into melting furnace, static holding furnace. According to the relevant standards and specifications, aluminum and aluminum alloy melting, it is appropriate to use the flame furnace, thermal efficiency should be greater than 40%; static holding furnace is generally used in resistance furnace, or flame furnace.
• According to whether it can be tilted, can be divided into fixed furnace, tilting furnace.

In the melting process of deformed aluminum alloy, the heat loss of flame furnace due to flue gas is up to 50% or more. In view of the serious problem of low efficiency of heat source utilization, the regenerative (heat storage) energy-saving melting furnace produced by Bolster can effectively utilize the waste heat of flue gas and has the following characteristics:

• High thermal efficiency and good heat exchange.
• Environmental protection: the exhaust temperature is lower than 180℃, no black smoke is produced.
• Energy saving: Heavy oil consumption is as low as 45 kg/ton-Al, natural gas 55 ^N-M3/ton-Al.
• Fast melting speed: its melting rate can be significantly increased by 30%.
• Easy process operation: fully automatic operation and control.
• There are many types of furnaces: round, rectangular, with tonnages from 3 to 50 tons;
• Suitable for various fuels: heavy oil, diesel, natural gas, liquefied petroleum gas, gas;

Technical parameters of 25t rectangular regenerative (heat storage) energy-saving melting furnace:

Application Purpose	Aluminum and aluminum alloy melting	Furnace capacity/t	25×(1+10%)
Furnace chamber working temperature/ ℃	1050	Burner form	Regenerative burner
Aluminum liquid temperature/ ℃	(720~760)±5	Number of burners/pcs	2
Melting rate /(t-h) -1 (t-h-1)	5.5~7	Compressed air pressure/MPa	0.5
Fuel Type	Natural gas	Heat control method	PLC automatic control
Fuel consumption ( N-M 3 /t-Al )	≤55	*Tilting angle of the tilting furnace	22° Max. temperature 25

According to the different requirements of users, the melting furnace, holding furnace can be designed as a fixed or tilting type; which round furnace can be designed according to user requirements into the side charging type, on the open lid charging type; In addition, the company can also be supporting the production of round furnace open lid machine, square furnace charging machine, waste charging machine.