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Overflow ball Mill

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Overflow ball Mill

Product description
The wet ball mill for mining is divided into lattice ball mill and overflow ball mill according to different mining methods. It has the advantages of high crushing ratio, good reliability, strong adaptability and large processing capacity. It is widely used in mineral processing, metallurgy and construction，chemical and other industries, is the main equipment for grinding operations.
Application
Iron ore, copper ore, limestone, gold ore, manganese ore, bauxite, lead-zinc ore

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Product Details
Technical Parameters
Case

Working Principle
Overflow ball mill is used in concentrator. The discharging is due to the fact that the hollow axis diameter of discharging end is slightly larger than that of feeding end, resulting in a certain inclination of pulp in the mill towards discharging end. When the height of pulp surface is higher than the lower busbar of inner diameter in the discharging inlet, the pulp overflows and discharges from mill. This is a non-forced high-level ore discharging, the discharging speed is slow, so the ore resides in the machine for a long time, the efficiency of grinding media is also low, so the overgrinding of the overflow ball mill happens very often, and the handling capacity is lower than the lattice type of the same specification. Generally, it is usually used for fine grinding or two-stage grinding.

Technical characteristics:
The transmission type of ball mill include edge drive, center drive, multi-point meshing edge drive, etc. The drive mode is asynchronous motor + reducer + pinion + big gear and synchronous motor + air clutch + pinion + girth gear.
*In general, the support mode of static and dynamic pressure bearings at both ends is adopted, and the fully closed self-aligning 1200-line contact'rocker-type'bearing is adopted. The support mode of static and dynamic pressure of single and double sliding or full static pressure support can also be adopted.
*The open girth gear is designed by the US AGMA standard, equipped with a reliable gear cover and an automatic glycerol spray lubrication device.
*Cylinder is the key part of the mill. The finite element analysis is carried out by computer to ensure the reliability of the mill.
*Large and medium mills are equipped with slow drive devices.
*Large and medium mills are equipped with lubrication stations of high and low pressure.
*Control and protection system is controlled by PLC

Drive types

Finite Element Analysis

Technical performance table of wet lattice ball mill

model	cylinder diameter	cylinder length	practical volume	rotating speed	loading capacity	Motor		weight for reference
model	cylinder diameter	cylinder length	practical volume	rotating speed	loading capacity	power	rotating speed	weight for reference
	mm	mm	m3	r/min		kw	r/min	t
MQS1224	1500	3000	5	26.6	9	95	742	18
MQS1515	1500	1500	2.3	29.2	4.8	60	725	13.7
MQS1524	1500	2400	3.7	29.2	7.6	90	730	16.5
MQS1530	1500	3000	4.6	26.6	10	90	742	19.5
MQS2130	2100	3000	9.4	22.1	20	220	740	45
MQS2430	2400	3000	12.2	21	25	250	980	55
MQS2470	2400	7000	26.66	21	54	475	740	67
MQS2721	2700	2100	10.6	19.7	22	280	733	69
MQS2736	2700	3600	18.5	20.5	39	400	187.5	74
MQS2740	2700	4000	20.5	20.24	38	400	187.5	77
MQS2760	2700	6000	34.34	19.5	53	630	589	84
MQS2941	2900	4100	26	19.34	42	450	740	76.1
MQS3164	3100	6400	43.7	18.3	56	1000	167	141
MQS3231	3200	3100	22.65	18.3	46.9	500	167	109
MQS3236	3200	3600	26.3	18.3	54	630	167	116.94
MQS3240	3200	4000	29.2	18.2	60	710	980	121.4
MQS3245	3200	4500	32.9	18.3	68.5	800	167	126.23
MQS3254	3200	5400	39.4	18.3	81.6	1000	167	135.4
MQS3645	3600	4500	41.4	17.25	86	1000	167	153.1
MQS3660	3600	6000	54	17.3	112	1400	167	190.6
MQS3685	3600	8500	79	17.4	144	1800	743	260.89
MQS4060	4000	6000	69.8	16.0	126	1500	200	215.5
MQS4067	4000	6700	76	16.0	155	1600	980	235.2
MQS40×13.5	4000	13500	157	16.5	280	3300	980	284/375

Technical performance table of overflow ball mill

Model	Cylinder diameter （mm）	Cylinder Length (mm)	Volume (m3)	Rotating speed (r/min)	Loading capacity (t)	Power (kw)
MQY3245	3200	4500	32.8	18.5	61	630
MQY3254	3200	5400	39.5	18.5	73	1000
MQY3260	3200	6000	43.7	18.5	81	1000
MQY3545	3600	4500	41	17.5	76	1000
MQY3650	3600	5000	46.2	17.3	86	1250
MQY3660	3600	6000	55	17.3	102	1250
MQY3690	3600	9000	83	17.3	145	1800
MQY3862	3800	6200	64	16.8	118	1500
MQY4060	4000	6000	70	16.8	113.4	1500
MQY4067	4000	6700	78	16.2	138	1600
MQY4361	4270	6100	80	15.7	144	1750
MQY4385	4270	8500	110	15.7	205	2500
MQY4561	4572	6100	93.3	15.1	151	2200
MQY4564	4500	6400	97	15.1	134	1950
MQY4576	4500	7600	111.7	15.1	180	2200
MQY4669	4600	6900	105.9	15	185	2300
MQY4870	4800	7000	118.9	15	208	2500
MQY4883	4800	8300	138	15	240	3000
MQY5064	5030	6400	121	14.4	224	2600
MQY5067	5030	6700	123.2	14.4	227	3000
MQY5070	5030	7000	128.8	14.4	227	3000
MQY5074	5030	7400	136	14.4	240	3300
MQY5080	5030	8000	147.2	14.4	246	3300
MQY5583	5500	8300	182	13.7	296	4100
MQY5585	5500	8500	185	13.7	300	4500
MQY5588	5500	8800	191.5	13.7	335	4500
MQY6095	6000	9500	249.3	13	462.6	6000
MQY67116	6710	11570	385	12.5	625	2×4700
MQY73115	7315	11497	494.1	12	871.2	2×6750
MQY80120	8000	12000	570.5	11.5	1005.8	15000

Project
China Gold Group has signed an order contract for the largest dual-motor driven semi-autogenous mill and dual-motor driven overflow ball mill in China. The total designed power of the ball mill is currently the largest in the world. The equipment will be used in the Wunuuge Tushan Copper-Molybdenum Mine Project. The designed capacity is 35,000 t /d, and the maximum capacity can reach 42,000 t /d

Equipment parameters:
Aogenous tumbling mill: ouble motor-driven semi-autogenous grinding mill with diameter of 11× 5.4 meters, total power is 2 × 6343 kW

Ball mill: 7.9 m × 13.6 m double motor driven overflow ball mill with a total power of 2 × 8500 kW.

Project
Duobaoshan, overflow type ball mill used for copper ore

4 sets of overflow ball mill Φ5500×8800mm, power: 4500kw

The first Φ5500×8500mm overflow ball mill of China (2 sets)

Overflow type ball mill Power:3000kW

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