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The brown fused alumina furnace is a three-phase AC tilting electric arc furnace. It takes bauxite, coke (anthracite) and iron filings as raw materials, and performs reduction and melting at a high temperature above 2000℃ to produce brown fused alumina (main component Al₂O₃ ≥ 94.5%).
It is used for smelting brown fused alumina and high-alumina fused alumina abrasives and refractory materials. The products are widely applied in abrasive tools manufacturing, glass kiln refractory lining, metallurgical nozzles and wear-resistant parts.
Structural Features
Furnace body: Welded steel plate structure with dry composite insulation lining, thin-shell tilting design, heavy load and high temperature resistance.
Furnace roof: Water-cooled low smoke hood, equipped with electrode holes, feeding holes and smoke exhaust holes.
Discharging: Hydraulic tilting type, maximum forward tilting angle 45°, adopting continuous pouring process with low energy consumption and good crystal quality.
Cooling system: External spray cooling for furnace body + water cooling for furnace roof and cross arm, with pressure and temperature alarm function.
Electrode Lifting System: Hydraulic / frequency conversion drive with PLC automatic adjustment, fast response and stable control; equipped with HP high-power graphite electrodes.
Short Network System: Water-cooled cables and steel-copper composite cross arm, with low and balanced three-phase impedance.
Hydraulic System: Working pressure 12–16MPa, used for furnace body tilting and electrode clamping.
Feeding System: Top / side feeding mode, matched with batching bin and conveying equipment.
Control System: PLC + industrial computer, real-time monitoring of voltage, current, temperature and cooling parameters.
Working Principle
Three graphite electrodes generate electric arc after power-on. The ultra-high temperature above 2000℃ melts the mixed raw materials of bauxite, coke and iron filings. Reduction reaction removes impurities such as silicon, iron and titanium to form brown fused alumina molten liquid with Al₂O₃ ≥ 95%.
The molten liquid is poured, cooled, crushed and magnetic separated to obtain finished products.
2. Main Technical Parameters (Mainstream 7500KVA Tilting Furnace)
Parameter
Specification
Rated Melting Capacity
10–25 tons per furnace
Furnace Shell Inner Diameter
3000 / 3300 / 3600 mm
Furnace Shell Depth
1800–2200 mm
Electrode Diameter
500–600 mm (HP High Power)
Electrode Lifting Speed
Rising: 2.5 m/min; Descending: 2.0 m/min
Transformer Rated Capacity
7500KVA / 5000KVA / 6300KVA / 10000KVA
Primary Voltage
10KV / 35KV
Secondary Voltage
120–240V (No-load Electric Regulation)
Working Temperature
2000–2250℃
Power Consumption
1800–2200 KWh per ton of finished product
Cooling Mode
Furnace body spray cooling + forced water cooling for roof & cross arm
Maximum Discharging Tilt Angle
Forward 45° (Hydraulic Tilting)
Power Supply
3-phase, 50Hz, 10/35KV
Control Mode
PLC automatic control + industrial computer monitoring
Shaanxi Chengda Industrial Furnace Manufacturing Co., Ltd. is a high-tech enterprise specialized in the research, design, and manufacturing of various industrial furnaces, including AC and DC steelmaking electric arc furnaces, ladle refining furnaces, ferroalloy ore thermal furnaces, ferroall... Shaanxi Chengda Industrial Furnace Manufacturing Co., Ltd. is a high-tech enterprise specialized in the research, design, and manufacturing of various industrial furnaces, including AC and DC steelmaking electric arc furnaces, ladle refining furnaces, ferroalloy ore thermal furnaces, ferroall...
