2012年(464)
分类: Delphi
2012-08-02 15:54:08
Ball mill is important equipment used for fine ore grinding operation in
building materials, metallurgy, mining, electricity, and chemical industry. As
the international development and domestic project experts' active research,
traditional ball mill has developed into professional, reasonable, high fine ore
degree, high production and energy saving. Modern ball mill integrates these
advanced technologies into one. There are some features of modern ball mill as
well as revolutions for old ball mill.
At first, it is energy saving and
production improvement revolution. Many s
have to improve product fineness, so they added new technology in it. In order
to improve production, they increase filled amount in grinding body, so as to
occupy ball mill motor margin capacity. If working current exceeds the rated
current, lines of the original electrical burning will occur frequently. If in
serious case, motor also burned and outages cut off. However, now users make
some change and use rolling bearings, many problems have been resolved. At the
same time, ball mill has effects of power saving and energy saving.
On the
other hand, modern ball mill has solved many disadvantages of old type ball
mill. Some exist
manufacturing defects, which cause ball mill problems, such as poor
concentricity of hollow shaft at both ends of drum, unstable current, burning,
bearing and shaft wear and power off. In such case, we should change main
bearing with rolling bearing so that it can run normally.
There are some
factors affecting ball mill working efficiency, such as water amount, ball
stone, speed reduction device, current, etc. The amount of ore stone water
content will without doubt have effect on working efficiency. Therefore, we add
water with proper amount to processed ore. It works for efficiency
improvement.
The diameter of stone ball used in ball mill is one of factors.
Different sizes stone ball is good for grinding ore rocks, as it can grind more
completely. Finally, rotating speed directly affect work efficiency of ball
mill. We should improve ball mill rotating speed to improve operation
efficiency. Install speed regulator can improve situation to some extent. And it
has same effect to install transducer in ball mill. Besides, the current is
equal to power input. Increase current will drive rotating speed. However,
current improvement is limited in a certain range. The upper limit of current
can be reached if the power reached rated power range. Once the current exceed,
it will cause ball mill burning.
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