Aluminium melting furnace
Melting furnace body
Melting furnace body Life of liner ≥ 3 yearsLife of furnace ≥ 20 years
We shall be responsible for overall design of equipment,rated parts,and be sure all data accuracy.
The steel structure of the furnace wall is welded by steel plate with thickness of 10mm and 20# type steel, steel structure strengthened in key parts to prevent deformation, the furnace side is fixed under the steel apron used to cover the gap between the stove and foundation;
The steel structure of the furnace bottom is welded by steel plate with thickness of 10mm and 20# type steel.High-strength furnace bottom design ensure structure performance of furnace,at the same time also open some riser vent to ensure water release,in accordance with the relevant Chinese national standards.
The composition, structure, function of each part of furnace liner. Refractory materials at high temperature strength, good thermal shock resistance, erosion resistance aluminum non stick, construction, has good properties, chemical composition of aluminum liquid has no effect and long service life. (pouring furnace roof and door, distribution by the light heat insulation casting material used in Suzhou Ruida products.
Melting pool is made into 9 blocks,with waterproof function,can effectively solve the pouring material produced in the process of using the stress, thermal expansion and cold shrinkage seepage problems;
Burner refractory materials with low cement 80A high strength pouring material,refractory life in normal production and maintenance conditions can guarantee the operation of 3 years.
Furnace bottom and furnace door slope(Thickness of liner 550mm)A)Layer: 300mmB)Impervious layer:100mmC)Insulation layer:150mm
Furnace wall below aluminum liquid level(Thickness of liner 550mm)A)Layer: 250mmB)Impervious layer:100mmC)Insulation layer:200mm
Furnace wall above aluminum liquid level(Thickness of liner 550mm)A)Layer: 250mmB)Impervious layer:150mmC)Insulation layer:25mm+125mm
Furnace top (Thickness of liner 400mm)A)Layer: 200mmB)Insulation layer:200mm+50mmC)The 300mm center distance uniform heat resistant stainless steel anchor claw hanging ceiling special shaped refractory brick
Furnace door (Thickness of liner 375mm)A)Layer: 200mmB)Insulation layer:25mm+150mmC)Width of furnace door liner:180mmD)Furnace door:With the heavy casting materials section water anchor mouth, to solve the refractories cracking phenomenon caused due to frequent opening and change.
Eye brick with unshaped castable sintering production, heat transfer ability is good, can avoid eye congestion.
Melting furnace door
Lifting device of furnace door adapt chain transmission device,heat resisting cast iron door asbestos fiber rope seal, pneumatic clamping.Door body durable, good insulation properties, good sealing. Furnace door frame materials, high temperature resistant, long service life.
Working principle of door drive and clamping structure ensure door drive precision, stable and reliable, low failure rate.
Furnace door lifting device is driven by the motor, realized by a motor driven chain wheel, chain, smooth operation. The door is flanked by guiding device with clamping guide groove; the door to press the sealing, clamping cylinder driving.
This melting furnace has one furnace door in the front side,to feed aluminum into furnace.2.5 Furnace door operation adapt industrial remote control device, remote remote control operation, convenient feeding and opening door control operation.
working principle,composition and structure, function, position and characteristics of burning furnace
The regenerative combustion system is composed of 2 heat storage bed, 2 groups of gas burner, flame programmer and PLC control system; significant characteristics of regenerative combustion system is fully by the combustion of waste heat recovery and the combustion air, energy saving, environmental protection;
Smelting furnace equipped with 1 sets of regenerative combustion system; using 2 regenerative gas burner, a single burner 7000kw power. The combustion system is composed of the combustion air, exhaust air, ignition and cooling, automatic control valve, automatic flow control system, electromagnetic valve, leak detection device, pressure switch, electric valve, main valve using Honeywell products
The regenerative combustion system using two alternate combustion burner, one burner, combustion exhaust gas from the exhaust fan through another burner suction to the regenerative heat, used for preheating combustion supporting wind, after combustion air temperature heat storage bed storage into the burner can reach 900 ℃; the temperature of exhaust gas discharged from heat storage bed less than 250 ℃;
The burner and the heat storage bed switch controlled by PLC system, each burner is equipped with a set of automatic flame monitor, security control and valve supporting device. According to the requirements of different smelting process, burner control system using the size of fire control; when the aluminum water reaches the set temperature, the control system of automatic adjust or close the flame, ensures that the temperature of aluminum water temperature control in the set value of ± 5 ℃;The first feeding system with small fire burning furnace, most of the space is occupied with the aluminum material, but will affect the combustion work condition variation, according to the small fire burning furnace air-fuel ratio regulation, can effectively save the energy, make the gas fully burning.
Heat storage bed body with steel plate welded with heat insulation materials, lining, the external shell surface temperature less than 80 ℃, with about three 1000kg two aluminum oxide solid sphere regenerator, regenerative body, lower the changing loading door, replacement and cleaning for alumina ball. Each burner is directly connected with the regenerator. The alumina ball storage performance, corrosion resistance, thermal shock resistance, after selection, washing, drying and can be used repeatedly;
The combustion system with good interlocking protection function and other detection function, can ensure that the burner full combustion and safe operation.
Diameter of regenerative ball is 25mm.
Combustion system for gas peak flow of 450 cubic meters per hour.3.1.9 Specification:a. Fuel: natural gasb. The gas calorific value: 7000kcal/Nm3c. The gas consumption: less than 65 cubic meters / tond. Type: regenerative burnere. Regenerative ball component: Aluminum oxide,aluminum ratio 75%f. Burner capacity: 7000kw/hg. Burner thermal efficiency:h. The temperature of the combustion air preheat: an average of 400 ℃i. The temperature of the combustion air preheat: an average of 400 ℃j. The exhaust gas temperature <250 ℃
Pipeline using 5mm pipe production. Normal pipeline used ten years free maintenance.
Fan with damping device4.3 Specificationa. Fan type:Combustion-supporting air fan(Made by Giansun)b. Fan volume: 5012m3/hrc. Air pressure: 7818pad. Motor power: 22KWe. Cooling method of fan bearing:Direct oil immersed type cooling + circulating water cooling
Smelting furnace is equipped with an outfall, the aluminum water into the furnace or casting through special channels, material, shape and size of melting furnace mouth bricks releasing.
Mouth brick with carbide casting structure, setting castable installed with the furnace casting construction, because of its good thermal conductivity, so can avoid eye congestion, special structure and easy cleaning and maintenance repair.
Smelting furnace outlet groove and the furnace outlet interface and good sealing, no leakage of aluminum.
Mouth shape: roundness inside and squareness outside.