Customizable high quality 20-150mm steel ball grinding media mill
balls
Introduction
It plays a huge role in the development of national economy.In some
special conditions, often need special material steel ball, to
complete the different environment required to achieve the
function.In fact, some special material steel ball has been widely
used in various fields of the national economy, including high
chromium steel ball;High chromium steel forging;Low chromium steel
ball;Low chromium steel forging;Chrome series liner board;Manganese
series liner plate;Hammer head;Multivariate alloy steel
ball;Multi-alloy lining plate;All kinds of wear-resistant
materials;.Their popularization and application not only promoted
the development of ball mill steel ball production industry, but
also promoted the technical development and scientific and
technological progress of related industries.
As in general grinding media ball manufactured from steel and cast iron. It has various applications
in that grinding purpose is what stands at first. Be the miling
particles are moisture or dry it will grind. Mostly these balls are
used in the manufacturing process. There are various types of
balls. Each of the balls has specific features it means a lot for
the special production process.
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Composition(%) | C | Si | Mn | Cr | P | S | Hardness(HRC) | Wear Rate in Gold Mine |
Low Cr Cast Balls | 2.0~3.0 | 0.5~1.5 | ≤0.50 | 1.5~2.5 | ≤0.07 | ≤0.07 | 46~55 | About 1000g/MT |
Mid Cr Cast Balls | 2.0~3.5 | ≤1.0 | 0.3~1.2 | 4.0~6.0 | ≤1.0 | ≤1.0 | ≥50 | About 870g/MT |
Cr12 Cast Balls | 2.0~3.0 | ≤1.2 | 0.7~2.0 | 10~12 | ≤0.06 | ≤0.06 | ≥55 | ≤870g/MT |
Cr15 Cast Balls | 2.0~3.0 | ≤1.2 | 0.7~2.0 | 14~16 | ≤0.06 | ≤0.06 | ≥58 |
Cr20 Cast Balls | 2.0~3.5 | ≤1.0 | 0.5~1.5 | 17~23 | ≤0.06 | ≤0.06 | ≥60 | ≤760g/MT |
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Ball mill steel ball is the ball mill equipment to grind the
material medium, through the ball mill between the ball ball and
the friction between the ball ball and the material to produce the
grinding effect, important basic parts, especially the precision
industrial steel ball plays a huge role in the development of
national economy.Widely used in cement plants, power plants,
etc.High and low chromium multi-element alloy steel ball, high and
low chromium multi-element alloy casting and forging.
Usage
Ball mill is the key equipment to crush the material after it is
broken.
Ball mill is one of the high fine grinding machines widely used in
industrial production.
There are many kinds, such as horizontal ball mill, ball mill
bearing bush, energy saving ball mill, overflow type ball mill,
ceramic ball mill, grid ball mill, etc.
Ball mill is suitable for grinding all kinds of ore and other
materials, is widely used in mineral processing, building materials
and chemical industries, can be divided into dry and wet grinding
methods.It can be divided into two types, grid type and overflow
type, according to different discharging modes.
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Folding requirements
The output of the ball mill is not only affected by the loading
capacity of the ball, but also related to the diameter of the
ball.Requires a certain ball diameter and different ball diameter
of the ball to maintain a certain proportion of the relationship,
the general cylinder body ball diameter size range is 25--60mm.If
the barrel body is a large diameter of the ball, the impact force
is larger, is favorable for crushing large lumber coal, but due to
the large gap between the ball and the ball, the relative surface
area is small, the extrusion, grinding effect is weakened, on the
coal mill output and coal fineness are adverse.There are too many
small diameter steel balls in the barrel body and the impact force
is small, which will decrease the output of the coal mill. At the
same time, due to the relative increase of the surface area of the
steel ball, the wear of the steel ball will increase, and the power
consumption of coal grinding will rise accordingly.
For example, during the operation of the coal mill, the weight and
diameter of the steel ball are constantly decreasing due to wear
and tear, so it is necessary to regularly fill in a new ball to
maintain a certain load of the steel ball.Generally, large diameter
balls are added, and the amount of balls should be determined
according to the wear rate of steel balls (the wear amount of steel
balls per ton of coal grinding) and the amount of coal
grinding.After running for a certain time, the number of small
diameter steel balls in the barrel increases.Therefore, after
running for about 3000 hours, it is necessary to stop and clean the
steel ball, so as to remove the ball with the diameter of less than
15mm and the broken ball, and fill the new ball at the same time.
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Folding method
The newly installed ball mill has a running-in process. In the
running-in process, the steel ball volume is added for the first
time, accounting for 80% of the maximum ball volume of the ball
mill. The ratio of the steel ball can be added according to the
size of the steel ball (Φ120㎜, 100㎜, 80㎜, 60㎜, 40㎜).Different ball
mill models have different ball loading capacity.For example, the
maximum ball loading capacity of MQG1500×3000 ball mill is 9.5-10
tons.The first addition of steel ball ball (120㎜ and 100㎜)
accounted for 30%-40%, in the ball 80㎜ accounted for 40%-30%, small
ball (60 and 40㎜) accounted for 30%.
Why ball mill ball in the process of ball mill in quantity only to
add 80%, because after installation of ball mill, ball mill need
mesh size, capacity are to be gradually increased, with ball mill
is normal running in two or three days in a row, pick up to check
the size of the gear meshing situation, everything is all right,
open the add the remaining 20% steel ball mill manhole covers the
second.
Note:
the addition of small steel ball is only the first time to add
ball.Because, when the ball mill is running normally, the
reasonable friction between the steel ball and the steel ball, the
steel ball and the ore, the steel ball and the lining plate of the
ball mill will increase the wear, so that the large ball mill is
small and the middle ball mill is small ball.So normally under
normal circumstances, you don't need to add a ball.The case of
adding pellets is that when there is no monomer dissociation in the
particle size of useful minerals, an appropriate amount of pellets
can be added when the fineness of grinding machine fails to meet
the requirements of flotation.In order to keep the filling ratio of
ball load and the reasonable ratio of ball, and to keep the stable
operation of ball mill, the ball must be compensated reasonably and
the ball must be worn with low compensation.
The weight added by the steel ball is determined by the quality of
the steel ball and the quality of the steel ball. It is best to use
the new wear-resistant steel ball, such as the steel ball forged by
the special treatment of the train wheel hub, which is particularly
wear-resistant.
Company show
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