Purposes: 
 RJ2 series of high-temperature pit resistance furnace national standard energy-efficient cycle operating pit resistance furnace, the maximum temperature of 1200 ° C, working temperature 1200 ° C, primarily for alloy steel, high-speed steel, high manganese steel, high chrome steel shaft, pipe normalizing, annealing, quenching and heat treatment of metal materials and machinery parts in the general atmosphere or simple protection. Power 15-4900KW; furnace diameter ￠ 300mm - ￠ 11m, maximum depth of 48m. 

 Structure description: 
 RJ2 series of high-temperature pit resistance furnace structure, shell made from steel plate and steel cylindrical furnace, sealed all welded. Lining with super lightweight 0.6g/cm3 vacuum energy-saving ball Refractory brick building. Lining and the furnace shell laminated set of acid aluminum fiber felt insulation, expansive space filled insulating powder. Resistance wire 0Cr27Al7Mo2 high resistance alloy wire wound into a spiral installed in the furnace put silk brick. Lid using a manual or electric lift. If the users need the protection of the atmosphere so that the workpiece to reduce oxidation, can be installed in the lid of stainless steel pomade Note instillation of methanol or kerosene to produce a simple protective atmosphere in the furnace lower part of the nitrogen inlet pipe is installed, you can access protection of nitrogen or break up of flammable gases, to prevent the occurrence of the explosion. To ensure the safe operation near the lifting mechanism equipped with a limit switch, this switch with the high-temperature pit resistance furnace control cabinet power supply interlock lid is closed through power. When the lid open limit switch to cut off the control power, the power of the heating element at the same time cut off, in order to ensure safe operation. Supporting automatic temperature control cabinet, the thermocouple in the high-temperature pit resistance furnace factory