Pit Type Furnace are energy-saving period-operated industrial furnace. The furnace body and chamber are generally circular pit-type structures, which are suitable for processing long-axis and rod-type workpieces. Pit Type Furnace can operate workpieces by vertical lifting from top to bottom for heat treatment to avoid deformation.
The Pit Furnace can perform high temperature heat treatment at 1200°C, medium temperature at 950°C, and low temperature at 650°C. It can be used for heat treatments such as high-temperature quenching, annealing, normalizing, and heating. It can also be used for heat treatments such as low-temperature tempering. Mainly used for normalizing, annealing, quenching and tempering heat treatment of alloy steel, high speed steel, high manganese steel, high chromium steel, shafts, pipes and other metal materials and mechanical parts in general atmosphere or simple protection.
The Pit Furnaces are generally installed in foundation pits, it is more convenient to use overhead cranes and hoist to load and unload workpieces. Due to different designs, a loading frame can be made, the workpiece can be placed in it and placed directly on the bottom of the furnace for heating. In addition, the furnace opening can be enhanced with a reinforced load-bearing design, then the workpiece can be heated by hoisting or vertically hanging tools. The furnace cover is generally driven by a motor reducer and automatically lifts by electric driven. After the furnace cover is closed, it is automatically pressed and sealed, and then the temperature control system automatically performs the heat treatment process. After heat treatment, the workpiece can be cooled in the furnace or lifted out for air cooling.
The heating methods of Pit Furnaces are divided into three different types: electric heating, oil heating, and gas heating, they are Pit-type Resistance Furnaces, Oil-fired Pit Furnaces, and Gas-fired Pit Furnaces. According to the chamber structure, it can be divided into: Composite Lined Pit Furnace built with lightweight bricks and insulation fiber, and Full Fiber Pit Furnace.
According to different heat treatment temperatures, the Pit Furnace can be divided into three types: 1200℃ high temperature Pit Furnace, 950℃ medium temperature Pit Furnace and 650℃ low temperature Pit Furnace.
According to different uses, the Pit Furnace can be divided into: Pit Quenching Furnace, Pit Annealing Furnace, Pit Tempering Furnace, Pit Aluminum Alloy Quenching Furnace, Pit Aluminum Alloy Aging Furnace, High-precision Pit Furnace, etc.
The temperature control adopts intelligent expert PID self-tuning control and adjustment method, with high temperature control accuracy. The control system has the function of temperature display and temperature curve recording for the heat treatment process. Heating temperature can be controlled automatically.
Customized design according to the actual requirement of customers.
Adopt high temperature and high emissivity electric heating alloy flat strip, low surface loading and long service life. The heat capacity is only 1/9 of the lightweight insulating refractory brick furnace lining, which greatly reduces the heat loss of the furnace. The furnace uses fiber modules that are high temperature resistant, non-deformable and highly compressible, and the modules have a long service life. Full fiber furnace lining can save 30% energy compared to brick type, and has low thermal conductivity, low heat capacity, excellent thermal stability and anti-corrosion properties.
Equipped with a large fan device to improve the temperature uniformity in the furnace. Multi-zone control to further improve the uniformity of furnace temperature. The furnace cover adopts an overhead crane or an automatic hydraulic mechanism to open and close, and it’s equipped with a guide column to ensure the opening and closing smoothly. The furnace cover and body are both made of high-temperature resistant fiber cotton. They have good thermal insulation performance, save energy and can reduce production costs.
The Pit Furnace is a partial pressure reactor that uses electrical heating. It mainly uses the principle of electric heating to carry out various chemical reactions, complete the heating and treatment under high-temperature and high-pressure conditions. It is a vertically arranged metal cylinder in which reactants and catalysts are added to react under high temperature and high pressure conditions. The furnace chamber and pipes are connected. The reaction fluid is evenly distributed in the pit furnace. The reaction temperature and pressure are stable and the reaction time is short. Therefore, it is very important for some production processes that require high temperature and high pressure reactions.
| Type |
Furnace Chamber Size |
Rated Voltage |
Rated Power |
Rated Temp. |
Heat Up time |
Max. Loading |
| RJ2-80-12 | 800x1000 | 380 | 80 | 1200 | 3 | 800 |
| RJ2-105-12 | 1000x1200 | 380 | 105 | 1200 | 3 | 1500 |
| RJ2-110-12 | 800x2000 | 380 | 110 | 1200 | 3 | 4800 |
| RJ2-220-12 | 1000x3600 | 380 | 220 | 1200 | 4 | 7000 |
| RJ2-125-9 | 800x3000 | 380 | 125 | 950 | 4 | 2400 |
*The output will vary according to different materials, feed particle size and other factors
Company: IDM Metallurgy Trading Co., Ltd.
Group Address: Tangshan City, Hebei Province, China
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