Large shaft furnace is suitable for annealing, quenching, tempering heat treatment of super long and special type rod and shaft workpieces, and vertical placement or hanging of workpieces.

※ Product Introduction:

RJ2 series large pit furnace, deep shaft furnace is generally used for heat treatment of large diameter workpiece, ring large workpiece, suitable for annealing, quenching, tempering heat treatment of super long and special type rod and shaft workpiece, vertical placement or hanging workpiece deformation is small.

This series of lengthened deep-well furnace can be applied to various working temperatures at high temperature, medium temperature and low temperature, and can be used for alloy steel, high chromium steel, high manganese steel and other metal materials and mechanical parts for annealing, quenching, tempering and other heat treatment purposes. The diameter of the large shaft furnace can reach 6 meters, and the depth of the deep shaft furnace can reach 26 meters.

※ Product Features:

Characteristics and design of large pit furnace or deep pit furnace

A large well furnace or deep well furnace is a special type of heat treatment equipment, which is usually customized according to the specific needs of the customer, including furnace size and auxiliary accessories. Here are some of the key features and design details of this type of stove:

Furnace dimensions and insulation materials

Large pit furnaces can be designed to special specifications with depths and diameters exceeding standard furnace sizes to accommodate different heat treatment needs. In order to ensure the uniformity of temperature at each point in the working area of the furnace, especially to reduce the temperature difference between the upper and lower depths, these furnaces will be specially designed heating elements, and the use of upper and lower multi-section partition professional production. Each heating element is controlled independently by microcomputer program with high precision to ensure control accuracy and furnace temperature uniformity.

In addition, these stoves are usually insulated with high-quality standard ceramic fiber lining, which not only saves energy and environmental protection, but also has a small loss of empty furnace and saves electricity by 30-50% compared to the same period last year.

Heating element and fixing method

The heating element is usually made of 0Cr27Al7Mo2 high resistance alloy tape, which is spread around the furnace and fixed with special ceramic screws, which is not easy to break and has a long service life.

Safe operation and temperature control

The furnace cover adopts electric lifting, and a limit switch is installed near the lifting mechanism. This limit switch is interlocked with the power supply of the high precision pit furnace control cabinet to ensure that the power is only switched on when the furnace cover is closed, and when the furnace cover is opened, the limit switch immediately cuts off the control power to ensure safe operation.

For tempering heat treatment or working conditions within 650℃, the heat-resistant stainless steel hot air internal circulation fan is designed and installed. During the heating process of the workpiece, the hot air is circulated up and down in the shaft furnace to ensure uniform heating of the workpiece.

Automatic control and recording

It is equipped with high-precision thermocouple and blue screen/color screen paperless automatic recorder to automatically control and record the furnace temperature to ensure the accuracy and traceability of the heat treatment process.

In summary, large well furnaces or deep well furnaces are designed with a focus on temperature uniformity, energy efficiency, safety, and automated control to meet the high standards required for heat treatment in different industries.

※ Design and Manufacture certification:

1. The indicators are designed and manufactured according to the national standards of industrial furnaces

2. Conduct the performance test of various components and issue a report (support customer on-site pre-acceptance)

3. The export of equipment meets the international standards for export.

Technical parameter