Machinery

We are a distinguished supplier and exporter of robust heavy-duty industrial equipment. Our comprehensive product range encompasses critical machinery such as ball mills, sugar crushing mills, stone crushers, vertical shaft and rotary kilns, crystallizers, filter presses, separators, and centrifugal machines.

In addition to these, we specialize in providing reliable material handling equipment, including but not limited to bucket elevators, air slides, screw and belt conveyors, cane unloading systems, as well as fabricated storage hoppers and tanks. Our commitment to delivering holistic solutions extends to cutting and feeding machinery designed to meet the stringent demands of industrial applications.

Recognizing the importance of maintaining operational efficiency, SK Alliance LTD also offers a range of spare parts, ensuring the sustained performance of your industrial equipment. These spare parts include large diameter gears, pinion shafts, gear reducers, bull rings, kiln tires, rollers, trunnion bearings, and a myriad of customized cast/forged components.

We take pride in our unwavering commitment to quality, precision, and reliability. Our goal is to meet and exceed the expectations of our clients, offering not only products but comprehensive industrial solutions designed to optimize performance across various sectors. Explore the strength and reliability of our industrial equipment and spare parts to elevate your operational efficiency.

Process Equipment

Ball mills are horizontal cylindrical shaped equipment that finds application in grinding hard minerals to the form of fine powder.

The grinding operation is achieved here through rotation of cylinder with steel grinding balls/ceramic balls that causes balls to fall back into cylinder and onto material which requires being grinded.

These mills are divided into multiple chambers along its length with the chambers further divided by diaphragms.

WORKING PRINCIPLE

Rotation of cylinder is done at relatively speeds that allows balls to cascade through mill base and in turn achieve grinding/dispersing of materials
Rotation of cylinder is normally between 4 to 24 RPM (depends upon mill diameter where larger diameter decreases the RPM and vice versa)
In case peripheral speed of mill is very high, it acts like centrifuge where balls do not fall back and stay on perimeter of mill (this point is called "Critical Speed"- ball mills normally operate at 65% to 75% of critical speed)
With critical speed (rpm) denoted by formula nC = 42.29/vd (d is internal diameter in meters), a mill with diameter of 5 meters will turn at around 14 rpm
These can be used for grinding material that is 1/4 inch and finer (can grind down to particle size of 20 to 75 microns)
For achieving desirable efficiency, these are operated in closed circuit system with oversize material being continuously re-circulated back into mill for further reduction

DESIGN FEATURES

Horizontal cylinder of ball mill fabricated using mild steel plates and rotated using side drive system present at one end of mill
Drive comprises girth gear made from alloy steel casting that are bolted onto mill and driven by its pinion made of alloy steel forging through use of gear reducer and motor (coupled together)
Two ends of cylinder covered with mill ends (also known as mill headers) with one placed at each end - at inlet and at discharge
Mill ends made out of alloy steel casting come with central inlet & discharge opening that is used as material entrance and exit point
Mill headers coming rested on fabricated trunions at both ends on which headers rotate on special self lubricating white metal lining
Option of external lubrication system provided for keeping mill headers optimally lubricated at all times
Can be provided with other accessories like set of low pressure & high pressure pumps that support pre-jacking mills during startup
Grinding Media is generally made of high-chromium steel/manganese steel
Mill Liners are cladded throughout its periphery of length and are made of high chromium steel/manganese steel

APPLICATION

These are widely used in grinding of -
Cement
Silicates
Building materials
Black and non-ferrous metals
Ceramics
Mineral ores
Calcium bauxite
Other materials that require to be grounded into fine powder form either through wet process/dry process