Many products in our daily lives are in the form of powders, as they react quickly and are easily absorbed as drugs. As reactants, they react quickly and react well. Since there are so many powder applications in our daily lives, turning items into powder requires us to grind them into powder. Previously, manual grinding was used, and the speed and efficiency of manual grinding were relatively slow. Later, the emergence of grinding machines helped us solve the problem of grinding efficiency. Grinding machines can help us improve grinding efficiency and set the grinding time properly, We can easily grind out powder that meets our usage requirements. But there are some dangers in using grinding equipment. Let's take a look at which dangers exist together.
1. When grinding combustible materials, the grinder produces a large amount of dust, which is prone to dust explosion. The pulverization process of combustible materials increases its chemical reactivity due to the expansion of the surface area of solid materials, resulting in the formation of explosive mixtures.
2. Sparks caused by friction and impact within the equipment may ignite materials.
3. Electrical and electrostatic sparks during the process ignite materials. Sparks caused by electrical equipment failures are a common ignition source.
4. Spontaneous ignition of deposited dust. The dust deposited on the heating surface will naturally appear after being heated for a period of time and become the ignition source of dust explosion.
The above are the risk factors that exist in grinding equipment. Dust explosion is easy to produce secondary explosion. The dust concentration during secondary explosion is generally much higher than that during primary explosion, so the power of secondary explosion is much greater than that of primary explosion. This is because the primary explosion blows up the dust deposited at the bottom. When fresh air blows in, it will cause secondary explosion under the open fire. Because the quantity and contact area of the dust increase, the secondary explosion is often more serious than the primary explosion, which is also the horror of dust explosion. So when grinding powder, we should pay attention to the amount of dust and the heat of the grinding machine. Grinding machines may generate sparks due to heat generated by friction, and friction with hard materials may also generate open flames. Therefore, we should pay attention to fire prevention measures during use.
