Gasification Daily Question 2018-11-1
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Why can’t the mill run idle for a long time? Answer: When the mill runs idly for a long time without any material inside, the steel rods within the mill grind against each other, generating a large amount of heat. Since this heat cannot be dissipated in time, it keeps accumulating, leading to wear, and the temperature of the bearing shells rises continuously.
Answer: When the mill runs idly for a long time without any material inside, the steel rods within the mill grind against each other, generating a large amount of heat. Since this heat cannot be dissipated in time, it keeps accumulating, leading to wear, and the temperature of the bearing shells rises continuously.
When the mill runs idle for a long time without any material being fed into it, the (steel rods) inside the mill grind against each other, generating a large amount of heat. Since this heat cannot be dissipated in time, it keeps accumulating, which causes the temperature of the mill’s bearing shells to rise continuously. Eventually, this leads to overheating of the bearing shells, resulting in their destruction.
When the mill runs idly for a long time without any material inside, the steel rods within the mill grind against each other, generating a large amount of heat. Since this heat cannot be dissipated in time, it keeps accumulating, leading to wear, and the temperature of the bearing shells rises continuously.
When the coal grinder is idling, the grinding components come into direct contact and friction with each other, resulting in increased metal wear； When metals collide and rub against each other directly, sparks are likely to be generated, which can also serve as a source of ignition for coal dust explosions. Therefore, the idling time of the coal grinder must be strictly controlled.
When the mill runs idly for a long time without any material inside, the steel rods within the mill grind against each other, generating a large amount of heat. Since this heat cannot be dissipated in time, it continues to accumulate, leading to wear, and the temperature of the bearing shells rises accordingly.
When the mill runs idly for a long time, the grinding media grind against each other, generating a large amount of heat. This heat accumulates over time, causing the temperature of the mill’s bearing shells to rise, eventually leading to the destruction of those bearing shells.
Idling generates a large amount of heat, and without material flowing in or out, this heat cannot be dissipated in time, which can easily lead to overheating of the bearing shells.
When the coal grinder is idling, the grinding components come into direct contact and friction with each other, resulting in increased metal wear； When metals collide and rub against each other directly, sparks are likely to be generated, which can also serve as a source of ignition for coal dust explosions. Therefore, the idling time of the coal grinder must be strictly controlled.
According to the regulations, the idling time of the ball mill must not exceed 10 minutes, as an excessive idling time leads to increased metal wear between the steel balls themselves, as well as between the steel balls and the wave-shaped tiles. The wear ratio generated during the normal operation and idling of the coal grinder is 1:50. On the other hand, when the coal grinder is idling, collisions between steel balls and between steel balls and wave-shaped tiles can easily generate sparks, and the occurrence of sparks is one of the causes of explosions in the grinding system.