Table of Contents
Which material is used in ball mill for size reduction?
The ball mill is used for size reduction process on materials such as coal, pigments and clay. The milling process can be carried out either wet or dry but the wet process is performed at low speed.
Why in ball mill different sizes of balls are used?
The ball size is one of the critical factors for determining the mill performance of ball mills. It is well known that larger balls are needed for the effective breakage of large-size particles, whereas smaller balls are more effective for the breakage of fine particles.
What is size reduction and principle of ball mill?
It works on the principle of impact and attrition: size reduction is done by impact as the balls drop from near the top of the shell. A ball mill consists of a hollow cylindrical shell rotating about its axis. Less wear takes place in rubber lined mills. The length of the mill is approximately equal to its diameter.
What are the different particle size reduction processes?
Size reduction may be achieved by two methods: 1] Precipitation 2] Mechanical process 1] Precipitation method: Substance is dissolve in appropriate solvent. 2] Mechanical process: Mechanical force is introduce by using different equipments like ball mill, colloid mill etc.
What equipment reduces size?
Particle size reduction equipment includes primary impact crushers and secondary crushers as well as milling machines – cage mills, hammer mills, pulverizers and grinders.
How do you measure a ball mill ball?
Based on his work, this formula can be derived for ball diameter sizing and selection: Dm <= 6 (log dk) * d^0.5 where Dm = the diameter of the single-sized balls in mm. d = the diameter of the largest chunks of ore in the mill feed in mm.
How do you calculate the capacity of a ball mill?
Mill internal load volume (m3) = (19.55*297.96)/100 = 58.52 m3 (2) Ball volume in total mill load could compute by Equation 3. Mill Ball (\%) = 100{[(ball volume in the 0.4 m3 sample)* 58.52] / 0.4}/297.96 (3) According to the results (Table 1), the ball filling percentage was obtained 1.3\%.
What are the different methods of reducing the particle size?
Mechanical techniques to decrease the particle-size of solids are generally classified in three categories: dry-milling, wet-milling, and high-pressure homogenization.