Ball Mill

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Application

The ball grinding mill is a key piece of equipment utilized for grinding crushed materials. A ball grinding mill consists of a hollow cylindrical shell which is partially filled with balls. The grinding media is the steel balls which can be used for reducing the size of materials to a fine powder. Grinding can be carried out either wet or dry for various ores and other materials. This industrial mill is widely used in production lines for powders such as cement, silicates, new building materials, refractory material, fertilizers, ore dressing of non-ferrous metals, glass-ceramics, etc.

At Sinomaly, known for our leading cement production lines, we also offer a wide range of ball mills tailored to meet various industrial needs. Our range of products include mills from 1.5m to 6.7m in diameter, with power capacities reaching up to 10,000 kW. Our dedicated R&D team enhances the design and functionality of these mills, ensuring they meet specific client requirements efficiently. This commitment to innovation and customization underscores our approach to providing industry-aligned solutions, particularly in cement production.

Technical Parameters

Size (Φ x L)	RPM (r/min)	Material Feed Size (mm)	Capacity (T/hr)	Ball Load (T)	Motor Power (kW)
Φ2.6x10	20.8	≤25	21-24	64	800
Φ2.6x13	20.8	≤25	28-31	81	1000
Φ3x9	19.13	≤25	40-45	85	1000
Φ3x11	18.92	≤25	44-47	95	1250
Φ3x12	18.92	≤25	48-52	103	1250
Φ3x13	18.92	≤25	48-52	116	1400
Φ3.2x11	18.3	≤25	45-48	112	1400
Φ3.2x13	18.7	≤25	50-55	133	1600
Φ3.4x11	18	≤25	45-55	120	1600
Φ3.5x13	17	≤25	60-65	156	2000
Φ3.8x13	17	≤25	60-70	190	2500
Φ3.8x13	17	≤25	60-70	185	2500
Φ4x13	16.3	≤25	70-80	191	2800
Φ4.2x11	15.8	≤25	100-110	190	2800
Φ4.2x13	15.8	≤25	120-130	240	3350
Φ4.2x13	15.8	≤2	180-200	240	3350
Φ4.8x14	15	≤25	100-115	285	4200

Parts of ball grinding mill

Parts	Quantity	Weight	Material
Rotating cylinder	1 Set	219300 kg	20g-Z25, Medium alloy steel
Slide shoe bearing at inlet end (equipped with temperature sensor pt100)	1 Set	13700 kg	ZSnSb11Cu6
Slide shoe bearing at outlet end (equipped with temperature sensor pt100)	1 Set	13500 kg	ZSnSb11Cu6
Discharge unit (equipped with stand)	1 Set	893 kg	Structural parts
Discharge outlet cover (equipped with stand)	1 Set	14400 kg	Structural parts
Slide shoe installation kit	1 Set	255 kg	Structural parts
Slide shoe lubrication system	2 Sets	486 kg	/
Gear	1 Set	119000 kg	/
Total	9 Sets	381534 kg	/

Introduction to parts of ball grinding mill

Feeding Device
Materials are sent into the ball grinding mill through the feeding device which has adopted the structure of sloping blinds for a smoother feeding process. The feeding device is equipped with an internal replaceable liner plate, as well as sealing device at the joint connecting with a rotating cylinder to prevent the entry of cold air. Spacers can be put between the air inlet pipe and the stand to adjust the height of the feeding device when necessary.

The Exterior of Feeding Device
The Interior of Feeding Device

Slide Shoe Bearing
The slide shoe bearing can adjust the position automatically when the ball grinding mill rotates, driving the axial movement of the shoe rotation and the rotating cylinder.

Slide Shoe Bearing Model
Slide Shoe Bearing Sole Plate Installation Site
Spherical Seat and Lubrication Circuit of Slide Shoe Bearing

Rotating Cylinder
The rotating cylinder is a key part of the ball grinding mill, which is made up of a hollow shaft, shell, lifter bars, diaphragm, and liner plate. The grate plate is made of wear-resistant cast steel considering that the balls may wear down the inner surface of the cylinder shell. Meanwhile, the grate plate is equipped with a ball return unit to increase the vent area.

Discharge Unit
The air outlet is located at the top of the discharge unit, while the discharge outlet is located at the bottom of the discharge unit. And the discharge unit is equipped with an inspection door for convenient inspection and maintenance.

Gear
This ball grinding mill is equipped with two stage planetary reduction gearboxes which change the fixed axis to a movable axis, thus improving the transmission efficiency to 96% which is 7.3% higher than common ball grinding mills, resulting in outstanding energy efficiency.

Features

Advantages of this ball grinding mill include: less friction, less energy and more easily activated, because large diameter double row self-aligning roller bearing instead of sliding bearing is used as the main bearing.
This ball grinding mill can achieve bigger capacity thanks to larger size of feed inlet and discharge outlet.
There are two kinds of feeder: combination feeder and drum feeder. Both are simple and installed separately.
This ball grinding mill is suitable for long and stable operation as there is no impact force, thus resulting in high efficiency and less time spent on maintenance.