Wuxi IDEAL Machinery Manufacturing Co., Ltd. will talk with you about the material of the shot blasting machine guard and the cause of the fire.

What material is the guard plate of shot blasting machine

The protective plate in the shot blasting machine is generally made of cast iron. As long as it operates different heating and insulation temperatures during heat treatment, it can obtain cast iron with different functions and characteristics, so it can meet different needs. Therefore, cast iron is used to make the guard board.

1. Guard plate in shot blasting machine

The protective plate in the shot blasting machine is generally made of cast iron. As long as it operates different heating and insulation temperatures during heat treatment, it can obtain cast iron with different functions and characteristics, so it can meet different needs. Therefore, cast iron is used to make the guard board.

Causes and countermeasures of shot blasting machine fire:

1. There is a hot fire source outside, such as welding sparks being sucked into the dust collector, or the steel shot being shot at high speed and hitting the steel plate rebounding after being sucked into the dust collector by the fan, causing internal combustion.

2. The internal temperature of the precipitator is too high, causing spontaneous combustion. We know that the surface temperature of the steel plate after shot blasting treatment is about 80 degrees. With the continuous rise of the temperature of the whole shot blasting system, the dirt on the surface of the workpiece is treated in the form of dust, and is subject to dust removal. If there is dust accumulation over the years, plus the iron powder which is oxidized to generate heat energy, it is easy to induce spontaneous combustion of the dust collector.

3. A large amount of oxide scale, dirt, welding slag and rust produced by shot blasting of the workpiece are prone to generate static electricity due to friction in the high-speed air flow. The electric charge with dust moves in the air duct and is suspended and accumulated in the dust collector, resulting in higher and higher electrostatic potential

1. Clean the rust dust regularly to prevent the rust dust from depositing. For the accumulation of heat energy, the accumulated dust in the dust remover shall be cleaned in time. It is required to carry out back-blowing and ash unloading in each shift. When the shot blasting machine handles flammable and explosive dust, it is necessary to pay attention to the negative pressure in the dust removal and shot blasting room.

2. Avoid impact sparks in the shot blasting machine. Fire source control during maintenance. During the subsequent internal and external maintenance work of the shot blasting unit, attention should be paid to the control of the fire source to prevent the line from fire. During the gas-electric welding operation, the surrounding dust should be removed first. After 10 minutes of the maintenance operation, the machine can be started for test run or production. At the same time, smoking or other ignition is strictly prohibited near the shot blasting unit to prevent hot particles or sparks from being sucked into the dust collector.

3. The shot blasting machine shall select appropriate explosion-proof glass bead or magnesium alloy shot. Thickened polyurethane protective plate shall be used inside the shot blasting machine, and stainless steel layer shall be used for the outer layer.

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