How to ensure that the furnace is safe and stable during work


The furnace is a kind of high temperature equipment, which needs to be closely related to fuel, gas, electric energy, dust, etc., because it is easy to cause various accidents such as fire, burn, explosion, poisoning and electric shock. Therefore, attention to industrial furnaces is much more unsafe than conventional cold processing equipment. Changlin energy-saving aluminum melting furnace reminds users to be very cautious when using.

The furnace is prone to burns, burns and burns due to its high temperature during operation; high temperature molten salt and molten metal will explode after encountering water; gas and controlled atmosphere are explosive gases, and oil passages, fuel tanks and oil depots are flammable. Explosive facilities, when operated or improperly used, serious explosions and poisoning accidents will occur; the safety protection device of the electric furnace will fail, and electric shock will occur after contact; the cyanide in the cyanide furnace is highly toxic; the salt furnace is heated to 550 °C. The above will produce spontaneous combustion; the nitrate salt will explode after being combined with charcoal and carbon black.

The repair environment of the furnace is poor, and many repair operations need to be carried out in the furnace. The space inside the furnace is very crowded, the natural lighting conditions are insufficient, and the ventilation conditions are not good. Workers are vulnerable to dust during operation and are sometimes directly exposed to high temperatures, soot, toxic gases and chemical materials. Some furnaces (such as cupola) can be as high as 10m-20m. Due to the narrowness of the furnace body, the repair work is a high-altitude three-dimensional intersection and multi-layer operation, which is very dangerous. Therefore, when operating and repairing industrial furnaces, safety issues must be taken seriously. Especially when organizing industrial furnaces, we must pay great attention to safety issues. Especially in the repair or repair of industrial furnaces, it is necessary to pay attention to the unfortunate accidents caused by these unsafe factors.


Ways to improve the temperature balance in the furnace:

I. Using a new type of combustion device

The high-speed temperature-regulating burner is used to replace the original low-speed burner. The high-speed burner is basically complete combustion of the fuel and combustion-supporting air in the combustion chamber, and the high-temperature gas after combustion is ejected at a speed of 100-300 m/s, thereby enhancing convective heat transfer. To promote the circulation of the gas in the furnace to achieve the purpose of uniform furnace temperature. In addition, by infiltrating the secondary air, the temperature of the outlet combustion gas is lowered to be 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.

2. Control the pressure value in the furnace

When the pressure in the furnace is negative, for example, the pressure in the furnace is -10 Pa, a suction wind speed of 2.9 m/s can be generated. At this time, a large amount of cold air is sucked into the furnace mouth and other tight places, resulting in the flue gas belt leaving the furnace. The heat loss of the walk increases. When the pressure in the furnace is positive, the high temperature flue gas will escape outside the furnace, which also causes the heat loss of the flue gas.

3. Enhance 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 billet due to the influence of the medium, such as oxidation, decarburization, carbonization and sulfurizing, copper infiltration, and the like. 2 Defects caused by abnormal changes in the internal structure, such as overheating, overheating, and lack of heat. 3 Because the temperature is unevenly distributed inside the billet, causing cracking of the billet caused by excessive internal stress (such as temperature stress and tissue stress).



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