Large trolley type resistance furnace/Large trolley type resistance furnace

The large trolley type resistance furnace is a national standard energy-saving periodic operation electric furnace, which adopts a microcomputer automatic temperature control cabinet with 8-stage program heat treatment process curve for high-precision temperature control. Large trolley type resistance furnaces are mainly used for high chromium, high manganese steel castings, gray cast iron, ductile iron, rolling mills, steel balls, crusher hammers, wear-resistant lining plates, quenching, annealing, aging, and heat treatment of various mechanical parts and mold materials. Especially suitable for quenching molds and high-speed steel.

Structure Introduction

The structure of this electric furnace is similar to that of a general standard trolley type resistance furnace. The outer shell is welded from steel plates and steel sections, and the bottom of the furnace body is connected to the trolley light rail as a whole. Users do not need to install a foundation, they only need to place it on a flat cement floor to use it. The electric furnace lining material is made of ultra lightweight 0.6g/cm3 microbead energy-saving refractory insulation bricks, and the interlayer is insulated with ultra long aluminum silicate fiber felt. The interlayer between the furnace shell and the lining aluminum silicate fiber interlayer is filled with expanded stone powder insulation. The furnace mouth is made of heavy anti-collision bricks and the trolley surface layer is made of heavy high aluminum anti pressure and impact bricks.

The large resistance trolley furnace body and trolley are constructed with labyrinth refractory materials, and a self operated sealing mechanism is also used to reduce the heat radiation and convection loss of the electric furnace, and improve the uniformity of furnace temperature.

The heating elements of this electric furnace are all spiral shaped heating elements, which are placed on the side of the furnace and the trolley masonry. The heating element material is internationally recognized 0Cr27AL7Mo2, and the high operating temperature of the element is 1400 ℃.

There is a silicon carbide furnace bottom plate installed on the trolley to carry the workpiece. In order to prevent the formation of oxide skin on the workpiece after heating from falling around the bottom heating element through the gap of the furnace bottom plate and causing damage to the heating element, it is necessary to regularly blow the oxide skin under the furnace bottom plate of the trolley, usually once a week. When blowing, lift the furnace bottom plate and use compressed air to blow away the oxide skin in the resistance wire groove.

The lifting and lowering of the furnace door is achieved by rolling up and down on the guide rail with rolling wheels. This not only ensures the sealing between the furnace door masonry and the furnace body masonry when the furnace door is closed, but also guarantees that the masonry will not be damaged by friction during the opening process. The furnace door is manually lifted and lowered with a counterweight, and the movement of the trolley is provided by an electric motor through a worm gear reducer, chain transmission, and equipped with an electromagnetic brake for appropriate adjustment.

To improve the uniformity of furnace temperature, the electric furnace adopts a microcomputer 8-stage program temperature control. The layout and wiring diagrams of the heating elements are attached to the technical documents and should be properly stored for future maintenance and replacement.

This electric furnace is equipped with a microcomputer program temperature control cabinet, which automatically controls the temperature of the heating process curve and the operation of the trolley. The cabinet is equipped with a central garden diagram automatic recorder, mainly for automatic recording of furnace temperature and over temperature alarm.

This electric furnace is equipped with thermocouples, compensation wires, and is used in conjunction with the instruments in the electrical cabinet.

This electric furnace is equipped with a microcomputer program temperature control cabinet, thermocouple, compensation wire, and a set of furnace bottom plate when it leaves the factory. The user shall provide all connecting wires, buried sewer pipes, etc. for installation.

Technical Specifications: