this is the presrntation which i made when i was in traning in ultratech cement hirmi , i got project on studying the process and operations of grinding process of ball mill in the cement industry , after the clincker formation.

1. PRESENTATION ON
CEMENT MILL PROCESS
AND OPERATION
‘BALL MILL’
MADE BY : PANKAJ VERMA
[BIT, RAIPUR]
Roll no. : 309303716022
Enrolment no. : BA7212
VOCATIONAL TRANING
PROJECT

2. 1.1. INTRODUCTION TO THE
ORGANIZATION
ABOUT ULTRATECH:
 Ultratech cement, india’s largest and the world’s 10th largest manufacturer of
cement,
 Ultratech’s parent company is the aditya birla group
 Ultratech cement provides a range of products that cater to all the needs from
laying the foundation to delivering the final touches. The range includes
ordinary portland cement, portland blast furnace slag cement, portland
pozzalana cement, white cement, ready mix concrete, building products and a
host of other building solutions.
 In ultratech cement hirmi,balodabazar .the cement produced are:
1) OPC 43 - ordinary Portland cement
2) PPC – Portland pozzolana cement
 Annual Production :4.20 million tonnes of cement
 Established in : 1994

3. INTRODUCTION TO CEMENT
• Cement is made by heating limestone (calcium carbonate) with small
quantities of other materials (such as clay) to 1450°C in a kiln. The resulting
hard substance, called 'clinker', is then ground with a small amount of
gypsum into a powder to make 'Cement', the most commonly used type of
cement. This cement is called Ordinary Portland Cement
• Ordinary Portland Cement (OPC) is the most common cement used in
general concrete construction when there is no exposure to sulphates in
the soil or groundwater.
• To retard the faster setting time of cement resulted from (C3A)
compound a percentage of raw gypsum (selenite) is added during the
grinding of the clinker.
• OPC is environment friendly as well as economical.
The Portland Pozzolana Cement is a kind of Blended Cement which is
produced by either inter grinding of OPC clinker along with gypsum and
pozzolanic materials in cetain propertion,. The pozzolanic materials commonly
used are:
Volcanic ash
Calcined clay
Fly ash
Lica fumes

4. Flow diagram

5. Flow diagram of cement manufacturing
process

6. BALL MILL
• A ball mill consists of a hollow cylindrical shell rotating about its axis. The axis of the
shell may be either horizontal or at a small angle to the horizontal.
• It is partially filled with balls. The grinding media is the balls, which may be made of
steel (chrome steel), stainless steel, ceramic, or rubber.
• The inner surface of the cylindrical shell is usually lined with an abrasion-resistant
material such as manganese steel or rubber. Less wear takes place in rubber lined
mills.
• A ball mill is a type of grinder used to grind and blend
materials.
• 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.

7. Operation principle of the ball mill
2 3

9. Ball mill

11. Cross-section view

12. Working
In case of continuously operated ball mill, the material to be ground is fed
from the left through a 60° cone and the product is discharged through a
30° cone to the right. As the shell rotates, the balls are lifted up on the
rising side of the shell and then they cascade down (or drop down on to
the feed), from near the top of the shell. In doing so, the solid particles in
between the balls and ground are reduced in size by impact.

13. •Applications
• The ball mill is used for grinding materials such as coal, pigments, and
feldspar for pottery. Grinding can be carried out either wet or dry but
the former is performed at low speed.
• Blending of explosives is an example of an application for rubber
balls.
• For systems with multiple components, ball milling has been shown
to be effective in increasing solid-state chemical reactivity.
• Additionally, ball milling has been shown effective for production of
amorphous materials.

14. • Size: The smaller the media particles, the smaller the particle size of the final
product. At the same time, the grinding media particles should be substantially
larger than the largest pieces of material to be ground.
• Density: The media should be denser than the material being ground. It
becomes a problem if the grinding media floats on top of the material to be
ground.
• Hardness: The grinding media needs to be durable enough to grind the
material, but where possible should not be so tough that it also wears down
the tumbler at a fast pace.
• Composition: Various grinding applications have special requirements.
Some of these requirements are based on the fact that some of the grinding
media will be in the finished product. Others are based in how the media
will react with the material being ground.
Material properties taken in consideration

15. Advantages of the ball mill
Ball milling boasts several
advantages over other systems:
• the cost of installation and
grinding medium is low;
• it is suitable for both batch and
continuous operation,
• similarly it is suitable for open
as well as closed circuit
grinding
• It is applicable for materials of
all degrees of hardness.

16. THANK YOU