Cement grinding course material
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The document discusses cement grinding and comminution engineering. It introduces topics like the cascading effect of grinding media charge, overview of internal elements of cement mills, operation of cement mills, chamber sampling, operation of separators, cement grinding systems, laws of comminution, and comminution methods. Comminution accounts for 50-70% of electrical energy consumption in plants. Methods include compression, friction/shear, inter-particle contact forces, and impact forces.
![ENERGYENERGY
Rittinger First Law of COMMINUTION
WR = 1
/X2 - 1
/X1
Kick Third Law of COMMINUTION
Wk = In [ x1
/X2]
BOND third Law of comminution
WB = EB [10/x80,p 10/80,p ]
E B = BONDS WORKABIILITY INDEX
X 80 = 80 % PASSING (um)
WB = SPECIFIC COMMINU TION ENGG [ KWh
/t]Avdhesh varshney](https://image.slidesharecdn.com/cementgrindingcoursematerial-180909045058/85/Cement-grinding-course-material-3-320.jpg)
Cement grinding course material
- 1. WEL COME TO CEMENT GRINDING Avadhesh Varshney
- 2. CONTENTSCONTENTS 1. Introduction 2. Cascading Effect of Grinding Media Charge 3. Grinding with Cement Mills Over View Internal Element 4. Over view Internal Element 5. Operation of Cement Mills 6. Chamber Sampling. 7. Seperator 8. Operation of Seperator a. Seperator Efficiency b. Circulating load c. Tromp curve 9. Cement Grinding System. Avdhesh varshney
- 3. ENERGYENERGY Rittinger First Law of COMMINUTION WR = 1 /X2 - 1 /X1 Kick Third Law of COMMINUTION Wk = In [ x1 /X2] BOND third Law of comminution WB = EB [10/x80,p 10/80,p ] E B = BONDS WORKABIILITY INDEX X 80 = 80 % PASSING (um) WB = SPECIFIC COMMINU TION ENGG [ KWh /t]Avdhesh varshney
- 4. 1. Comminution Engineering Size Reduction Comminution 50% - 70% of Plant Electrical Engg Consumption 2. Comminution Methods i. Compression forces ii. Friction / Shear forces iii. Inter particles contact forces iv. Impact Forces Avdhesh varshney
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