Large Scale Grinding Ball Mill for Mining Portland Cement
Ball mill is a type of grinder, is a cylindrical device used in grinding (or mixing) materials like ores, chemicals, ceramic raw materials and paints. Ball mills rotate around a horizontal axis, partially filled with the material to be ground plus the grinding medium. Different materials are used as media, including ceramic balls, flint pebbles andstainless steel balls. An internal cascading effect reduces the material to a fine powder. Industrial ball mills can operate continuously, fed at one end and discharged at the other end. Large to medium-sized ball mills are mechanically rotated on their axis, but small ones normally consist of a cylindrical capped container that sits on two drive shafts (pulleys and belts are used to transmit rotary motion). A rock tumbler functions on the same principle. Ball mills are also used in pyrotechnics and the manufacture of black powder, but cannot be used in the preparation of some pyrotechnic mixtures such as flash powder because of their sensitivity to impact. High-quality ball mills are potentially expensive and can grind mixture particles to as small as 5 nm, enormously increasing surface area and reaction rates. The grinding works on the principle of critical speed. The critical speed can be understood as that speed after which the steel balls (which are responsible for the grinding of particles) start rotating along the direction of the cylindrical device; thus causing no further grinding.
Structure of Ball Mill
Ball mill is mainly composed of feeding part, discharging part, rotating part, transmission part (reducer, pinion, electric motor and electric control) and so on. Its hollow shaft is made of cast steel and inner lining is detachable and can be replaced. The rotating big gear is processed by casting hobbing machine. The inside of the cylinder is equipped with wear-resistant liners. The machine runs steadily and reliably. The main body of ball mill includes cylinder equipped with wear-resistant liners, bearing which supports the cylinder and maintains the cylinder's rotation, the drive part such as motor, gears, pulleys, V-belt, etc.
Classification of Ball Mill
According to different ways of discharging material, there are two kinds of ball mills, grate type and overfall type. According to different materials, it can be divided into cement mill, ceramic sand mill, magnesium ball mill, lime ball mill and ore dressing mill. According to the technical operation, there are dry ball mill, wet ball mill, intermittent ball mill. According to the shape of the cylinder, there are short cylinder ball mill, long cylinder ball mill, tube mill and cone ball mill.
The material in the feeding end cover hollow shaft continuously into the cylinder. The cylinder rotates, centrifugal force and friction force, grinding media and ore with the cylinder walls rise to a certain height, the weight of a parabola fall or fall down. Ore grinding is mainly rely on crushing medium drop impact force and motion when the abrasive action to the solid line. Mobile internal ore barrel is by continuously feeding ore pressure line. Hollow shaft product finally from the discharge end of the exhaust cover. Wet grinding, ore taken away by the water; When air dry grinding, ore is to draw out barrel.
| model |
cylinder rev(r/min) |
grind media weight |
feeding size(mm) |
output size(mm) |
output |
motor |
| (t) |
(t/h) |
type |
power |
| MQG900X1800 |
38 |
1.8 |
≤ 25 |
0.074-.06 |
0.8-1 |
Y255M-8 |
22 |
| MQG900X3000 |
37.4 |
2.7 |
≤ 25 |
0.074-0.3 |
0.8 |
Y225M-6 |
30 |
| MQG1200x2400 |
32 |
4.8 |
≤ 25 |
0.074-.06 |
1.5-2 |
Y280M-8 |
45 |
| MQG1200X4500 |
30 |
5.2 |
≤ 25 |
0.074-.06 |
1.5 |
Y280M-6 |
55 |
| MQG1500x4500 |
28.8 |
10 |
≤ 25 |
0.074-0.4 |
3-4 |
JR126-8 |
110 |
| MQG1500x5700 |
28.8 |
12 |
≤ 25 |
0.074-0.4 |
3-5 |
JR127-8 |
130 |
| MQG1500x6400 |
28.8 |
13 |
≤ 25 |
0.074-0.4 |
3-5 |
JR127-8 |
130 |
| MQG1830x5400 |
24.5 |
15 |
≤ 25 |
0.074-0.4 |
5-7 |
JR137-8 |
210 |
| MQG18306400 |
24.5 |
19 |
≤ 25 |
0.074-0.4 |
5-7 |
JR137-8 |
210 |
| MQG1830x7000 |
24.5 |
20 |
≤ 25 |
0.074-0.4 |
6-8 |
JR138-8 |
245 |
| MQG2200x7000 |
21.6 |
30 |
≤ 25 |
0.074-0.8 |
8-10 |
JR158-8 |
380 |
| MQG2200x9000 |
21.4 |
34 |
≤ 25 |
0.074-0.8 |
8-10 |
JR1510-8 |
475 |
| MQG2400x7000 |
20.4 |
36 |
≤ 25 |
0.074-0.8 |
10-14 |
JR1510-8 |
475 |
| MQG2400x8000 |
20.4 |
42 |
≤ 25 |
0.074-0.8 |
10-14 |
YR630-8 |
560 |
| MQG2600x8000 |
19.6 |
52 |
≤ 25 |
0.074-0.8 |
16-20 |
JR1512-8 |
630 |
| MQG3000x9000 |
18.3 |
78 |
≤ 25 |
0.074-0.8 |
20-25 |
YR1000-8/1180 |
1000 |
Henan Zhengzhou Mining Machinery Co., Ltd has become an integrated modern enterprise with scientific research, design, development, manufacturing, sales, installation, commissioning and training services.
The main products of company include: ball mill, rotary kiln, vertical preheater, cooler, crusher, metallurgical coke oven, magnetic separator, flotation machine, classifier, feeder, bucket elevator, preheater, dust collector, elevator, drier, and other equipments relate to metallurgy, cement, lime, mineral processing, refractory, chemical industry. The products of Henan Zhengzhou Mining Machinery Co., Ltd have been sold to every province of China and exported to Russia, Korea, Vietnam, Malaysia, Nepal, Bangladesh, Mexico, Armenia, Africa, South America and other countries and regions. At present, Henan Zhengzhou Mining Machinery Co., Ltd is the largest equipment supplier for magnesium production and has been on the leading position for 25 years in the market.
We have advanced production technology and management. Our professional engeneers and after-sales groups production technology can offer convienient service for our customers.
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