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Application
The RT3-120-14 electric bogie hearth furnace is mainly used for heat treatment of steel structure parts, cast steel parts, shaft bar parts, tool steel products, etc.
Specifications
Rated power: 120Kw+10%
Power supply: 380V, 3P, 50Hz
Rated temperature: 1400℃
Control zone: 2 zones (one for furnace body, one for bogie)
Effective working size: 1500×800×800mm(L×W×H)
Heating element connection: Y
Temperature uniformity: ≤±5℃
Temperature measurement accuracy: ±1℃
Empty furnace power consumption: 21KW
Temperature control method: PID automatic temperature rise; Huibang temperature controller with 60-segment programming table, Shimaden regulator;
Heating element: U30 silicon carbide rod
Furnace door opening method: Electric hoist up-down, sealed by spring
Bogie moving method: By the reducer
Bogie driving power: 1.1KW
Furnace lining: Mullite bricks
2. Structural Introduction
The RT3-120-14 car bottom furnace is mainly comprised of furnace body, lining, furnace door and door compression system, bogie, heating element, and temperature control system.
2.1 furnace shell
The steel furnace body of the furnace for heat treatment of metals is made from 6-8# sectional steel and 3-14mm steel plates. There is a layer of insulation asbestos board at the furnace shell to reduce the temperature of the shell. The asbestos board is pasted with aluminum silicate fiber cotton with temperature resistance of 1000 degrees, to ensure that the temperature of the shell is less than 50℃.
The heat treat furnace door is electrically lifted upward and downward by the hoist.
The outer surface of furnace shell is treated with environmental painting to make it beautiful.
2.2 furnace lining
2.2.1 The heat treating furnaces and equipment lining is made of 75% AL2O3 mullite bricks;
2.2.2 max temperature of furnace lining is 1400℃.
2.2.3 air hole rate: 5-6%;
2.2.4 thermal conductivity: KcaL/m.h.c＞0.9;
2.3 insulating system of furnace body and bogie
The insulation material is close to the outside of the furnace lining and consists of 4 layers.
1st layer: mullite bricks, heat resistance of 1400℃;
2nd layer: light high aluminum bricks, heat resistance of 1250℃;
3rd layer: aluminum silicate fiber cotton, heat resistance of 1100℃;
4th layer: diatomite brick, heat resistance of 900℃;
The layer that is close to the furnace shell is made of fiber cotton and asbestos board, heat resistance of 500-800℃;
All the insulation layer is made of standard bricks with size of 230×113×65mm.
2.4 heating element
2.4.1 the heating element is made of U30 silicon carbide rod;
2.4.2 the heating element is divided into 2 zones.
2.4.3 the heating elements are distributed on both sides of furnace chamber and bogie.
18pcs silicon carbide rods for furnace chamber, 6pcs silicon carbide rods for bogie.
2.5 control cabinet
2.5.1 control zone: 2 zones;
2.5.2 PID automatic and program control;
2.5.3 over temperature power off function, over temperature sound off alarm function;
2.5.4 GGD cabinet with electrostatic spray;
2.5.5 Changzhou Huibang GR858P temperature controller;
2.6 temperature measurement system
2.6.1 the thermal couple is S type, platinum-platinum rhodium core;
2.6.2 sheath of thermal couple: corundum tube;
