How to improve the temperature uniformity of the tubular resistance furnace?

One: Use a new (new technology) combustion device:

The high-speed temperature regulating burner is used to replace the original low-speed burner. The high-speed burner is basically the complete combustion of fuel and combustion air in the combustion chamber, and the high-temperature gas after combustion is injected at a speed of 100-150m/s, thereby enhancing convective heat transfer. Promote the circulation of the gas in the furnace to achieve the goal of uniform furnace temperature. In addition, by infiltrating the secondary air, the temperature of the outlet combustion gas is reduced to close to the heating temperature of the workpiece, and the temperature of the flue gas can be adjusted to improve the heating quality and save fuel. Significant effect.

Two: Control the pressure in the furnace:

When the pressure in the furnace is negative, for example, if the pressure in the furnace is -10Pa, a suction speed of 2.9m/s can be generated. At this time, a large amount of cold air is sucked into the furnace mouth and other places that are not tight, causing the flue gas to leave the furnace. The calorie loss from walking increases. When the pressure in the furnace is positive, the high-temperature flue gas will escape out of the furnace, which will also cause the heat loss of the flue gas.

Third: Improve the degree of automation control:

Defects caused by improper heating can be divided into:

1. Defects caused by changes in the chemical state of the outer layer of the blank due to the influence of the medium, the influence of the medium, the influence of the medium, the change of the chemical state of the outer layer of the blank caused by oxidation, decarburization, carbonization and sulfidation, copper infiltration, etc.

2. Defects caused by abnormal changes in internal organization structure, such as overheating, overheating and lack of heat.

3. Due to the uneven temperature distribution inside the billet, excessive internal gravity (such as temperature gravity, tissue gravity) is generated, and the billet cracks.