A ball mill is a type of grinder used to grind and blend bulk material into QDs /nanosize using different sized balls. The working principle is simple; impact and attrition size reduction take place as the ball drops from near the top of a rotating hollow cylindrical shell.
The energy consumption of the system is low and is 1/4 of that of a traditional cylinder type ball mill and 1/3 of that of a raymond mill, and cost can be saved. The operation noise of the main engine of the system is lower than 80 db. The noise is low, so that a relatively comfortable working environment can be provided for the workers.
The Ball mill pulveriser is basically horizontal cylindrical tube rotating at low speed on its axis, whose length is slightly more to its diameter. The inside of the Cylinder shell is fitted with heavy cast liners and is filled with cast or forged balls for grinding, to approximately 1/3 of the diameter.
The ball mill was incorporated into a test system as shown schematically in figure 2. Fuel oil burned with stoichiometric quantities of air, produced both inert sweeping gas and heat for mill operation at elevated temperatures. A heat exchanger was used to heat any desired mass flow of sweeping air or inert gas to temperatures up to 700° F.
June 10, 2020
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