food mill

Specifications Hot Sale Cement Ball Mill

1. Long service life

2. Higher productivity

3. Cost saving

4. CE and ISO9001:2000

Cement Ball Mill   Introduction of Cement Ball Mill   A cement mill is the equipment used to grind the hard, nodular clinker from the cement kiln into the fine grey powder that is cement. Most cement is currently ground in ball mills.   The cement mill produced by our company is with larger productivity and energy saving. Compared with internationally stipulated ball mill of the same specifications, under the other situation of the same parameters, the output per machine hour has increased by 20%, and the power consumption per unit product has decreased by 10-15%. For open-circuit grinding, the specific surface area of cement can reach above 20m2/kg. Besides, the performance of cement mill has reached international advanced level, and it is suitable for closed-circuit grinding, together with separator.     Working Process of Cement Ball Mill   A ball mill is a horizontal cylinder partly filled with steel balls (or occasionally other shapes) that rotates on its axis, imparting a tumbling and cascading action to the balls. Material fed through the mill is crushed by impact and ground by attrition between the balls. The grinding media are usually made of high-chromium steel. The smaller grades are occasionally cylindrical ("pebs") rather than spherical. There exists a speed of rotation (the "critical speed") at which the contents of the mill would simply ride over the roof of the mill due to centrifugal action. The critical speed (rpm) is given by: nC = 42.29/√d, where d is the internal diameter in meters. Ball mills are normally operated at around 75% of critical speed, so a mill with diameter 5 meters will turn at around 14 rpm.   Structure of Cement Ball Mill   The mill is usually divided into at least two chambers (Depends upon feed input size presently mill installed with Roller Press are mostly single chambered), allowing the use of different sizes of grinding media. Large balls are used at the inlet, to crush clinker nodules (which can be over 25 mm in diameter). Ball diameter here is in the range 60–80 mm. In a two-chamber mill, the media in the second chamber are typically in the range 15–40 mm, although media down to 5 mm are sometimes encountered. As a general rule, the size of media has to match the size of material being ground: large media can't produce the ultra-fine particles required in the finished cement, but small media can't break large clinker particles.   Application of Cement Ball Mill   The cement mills on a cement plant are usually sized for clinker consumption considerably greater than the output of the plant's kilns. This is for two reasons: The mills are sized to cope with peaks in market demand for cement. In temperate countries, the summer demand for cement is usually much higher than that in winter. Excess clinker produced in winter goes into storage in readiness for summer demand peaks. For this reason, plants with highly seasonal demand usually have very large clinker stores. Cement milling is the largest user of electric power on a cement plant, and because they can easily be started and stopped, it often pays to operate cement mills only during "off-peak" periods when cheaper power is available. This is also favourable for electricity producers, who can negotiate power prices with major users in order to balance their generating capacity over 24 hours. More sophisticated arrangements such as "power shedding" are often employed. This consists of the cement manufacturer shutting down the plant at short notice when the power supplier expects a critical demand peak, in return for favourable prices. Clearly, plenty of excess cement milling capacity is needed in order to "catch up" after such interruptions. Dust Collection of Cement Ball Mill   A current of air is passed through the mill. This helps keep the mill cool, and sweeps out evaporated moisture which would otherwise cause hydration and disrupt material flow. The dusty exhaust air is cleaned, usually with bag filters.   Main Technical Parameters of Cement Mill:   

Spec. (m)	Rotary speed(r/min)	Feed size (mm)	Capacity(t/h)	Load of grinding media (t)	Main motor			Main reducer		Weight (exclude motor and reducer)(t)
					Model	Power(kw)	Speed (r.p.m)	Model	Speed ratio
2.2×11	22.2	≤25	15~17	50	JR1512-8	570	740	ZD80	5	83
2.4×8	20.91	≤25	14~18	39.5~42	JRQ1512-8	570	740	ZD80	5	76.4
2.4×9	20.91	≤25	23~25(close)	50	TR1512-8	570	740	ZD80	5	81
2.4×10	20.91	≤25	16~18(open)	50	TR1512-8	630	740	ZD80	5	92.4
2.4×11	21	≤25	17~19(open) 20~22(close)	60~62	YR710-8/1180	710	740	JDX630	5.6	105
2.4×13	21	≤25	21~22(open) 24~26(close)	66~68	YR800-8/1180	800	740	MBY710	6.3	117
2.6×10	20.6	≤25	21~24	64	YR800-8/1180	800	740	JDX710	6.3	133
2.6×13	20.6	≤25	28~31	80	YR1000-8/1180	1000	740	JDX800	6.3	151
3.0×9	19.13	≤25	35~40(close)	80~83	YR1000-8/1180	1000	740	MBY800	7.1	137
3×11	18.92	≤25	44~47(close)	95~100	YR1250-8/1430	1250	740	JDX900	7.1	159
3×13	18.92	≤25	39~45(open)	110~116	YR1400-8/1430	1400	740	JDX900	7.1	183
3.2×11	18.3	≤25	45~48(close)	110~112	YR1400-8/1430	1400	740	JDX900	7.1	195.5
3.2×13	18.7	≤25	45~55(open)	125	YR1600-8/1430	1600	740	JDX1000	7.15	213
3.5×13	17.5	≤25	50~60	150	YR2000-8/1730	2000	740	JDSX1000	6.3	240.5
3.8×13	16.3	≤25	65~70	185	YR2500-8/1730	2500	740	JS130-C-F1		220
4×13	16.3	≤2	78~80	191	YRKK900	2800	745	JS140-A		200
4.2×11	15.6	≤2	120~140	190	YR2800-8/1730	2800	740	JS140-A-F1D		245
4.2×13	15.6	≤2	140~155	225	YRKK1000-8	3350	995	JS150-A		260

      For more information, you could visit our web site or contact me directly. Telephone: (+)86-21-59515582   Skype ID: abbyliu18  

Contact Person :	Ms. Abby Liu (Sales)
Address:	No.33 Shenxia Road, Malu Industrial Park, Jiading District, Shanghai, China
Zip/Postal:	201818
Telephone:	0086-21-59515582
Fax:	0086-21-59515833
Mobile:	0086-15921678822