鉱山設備ガイド：What Equipment Should You Use for Grinding in Concentrators, Cement Plants and Building Materials? A Complete Guide to Energy-Saving Grid (Overflow) Ball Mills

The energy-saving grid type (overflow type) ball mill is the key equipment for grinding materials after they have been crushed. It is mainly used for dry or wet grinding of various ores and other materials. It is widely used in the production industries of ferrous and non-ferrous metal beneficiation, cement, silicate products, new building materials, refractory materials, fertilizers, as well as glass and ceramics. It is an indispensable core grinding equipment in national economic sectors such as mineral processing, construction, and chemical industries. This series of equipment uses the rotation of the cylinder to drive steel balls to impact and grind the materials, thus achieving material fineness. Why choose the energy-saving grid type (overflow type) ball mill? Because the MQ series ball mill is structurally optimized based on traditional ball mill technology, using high-end rolling bearing support instead of the traditional Babbitt alloy bearing shaft support, resulting in lower operating resistance, energy savings of 10-20%, and an increase in capacity of over 20%. At the same time, it uses dry oil lubrication instead of the original thin oil lubrication, saving more than 70% of oil consumption. Large mills do not need to be equipped with high and low-pressure lubrication stations, reducing equipment investment costs. These advantages make this equipment perform excellently in grinding operations in beneficiation plants, cement plants, chemical, and building material industries. This equipment is mainly used in grinding operations at ferrous and non-ferrous metal beneficiation plants; raw material and clinker grinding in cement plants; raw material handling for silicate products; grinding for new building materials and refractory materials; fertilizer production; and material fining in the glass and ceramics industry. The target users for this equipment include beneficiation plants and mining enterprises, equipment procurement and maintenance departments of cement plants, procurement departments of chemical plants and building material companies, refractory material and glass ceramic manufacturing enterprises, EPC contractors of grinding production lines, equipment dealers and stockists, as well as overseas mining and building material project purchasers. When should this equipment be selected or replaced? When ores and other materials need to be ground dry or wet to 0.074-0.8mm or finer; when beneficiation plants need to improve grinding efficiency and reduce energy consumption; when old ball mills have high energy consumption, severe bearing shaft wear, or high lubrication costs; and when new beneficiation, cement, or building material production lines need to be equipped with efficient and energy-saving grinding equipment, this series of energy-saving ball mills should be given priority. How to choose an energy-saving grid type (overflow type) ball mill? Step 1: Confirm the type and hardness of the material, and choose a grid type or overflow type according to the material characteristics; Step 2: Confirm the feed particle size and the required discharge particle size, with feed particle size ≤10-≤25mm, and discharge particle size 0.074-0.8mm to 0.074-0.6mm; Step 3: Confirm production capacity, and select the corresponding model within the range of 0.15-550t/h according to the production line capacity requirements; Step 4: Confirm the ball loading, and choose a ball loading of 0.56-180t according to the cylinder specifications and material characteristics; Step 5: Confirm the cylinder rotation speed, and select 15.6-45.8r/min according to material hardness and grinding requirements; Step 6: Confirm motor power and model, and select a motor of 7.5-2300kW according to processing capacity and material hardness; Step 7: Confirm the installation foundation, which needs to be installed on a solid concrete foundation with anchor bolts; Step 8: Confirm environmental protection and automation configuration, which can be equipped with a dust removal system, electrical control system, and central control system.

Energy-saving grid type (overflow type) ball mill specifications and performance parameters table

Model	Cylinder rotation speed (r/min)	Ball loading weight (t)	Feed particle size (mm)	Discharge particle size (mm)	Production capacity (t/h)	Motor model	Motor power (kW)	Weight (t)
MQG600×1800	45.8	0.56	≤10	0.074-0.8	0.15-0.6	Y160M-6	7.5	2
MQG900×1800	38	1.80	≤25	0.075-0.6	0.4-2.7	Y200L-6	22	5.5
MQG900×3500	37.4	3	≤25	0.074-0.34	0.8-3.9	Y255M-6	30	8
MQG1200×2400	36	4.8	≤25	0.075-0.6	1.5-5.2	Y280S-6	37	9.8
MQG1200×4500	36	5.2	≤25	0.074	1.5-5.6	Y280M-6	45	13.7
MQG1300×4000	32	5.8	≤25	0.075-0.6	2-7.5	Y280M-6	45	14.8
MQG1500×3500	28.8	8.3	≤25	0.075-0.4	3.4-14	YR280M-8	75	17.6
MQG1500×4500	28.8	10	≤25	0.075-0.4	3.5-15	JR125-8	95	22.5
MQG1500×5700	28.8	12	≤25	0.074-0.4	3.5-16	JR126-8	110	26.7
MQG1500×6400	28.8	13	≤25	0.074-0.4	4-18	JR127-8	130	29.2
MQG1830×3600	24.5	16	≤25	0.074-0.4	5.8-25	JR127-8	130	31.4
MQG1830×4500	24.5	17.5	≤25	0.074-0.4	6.6-28	JR128-8	155	32.6
MQG1830×7000	24.5	20	≤25	0.074-0.4	7.5-31	JR138-8	245	39.6
MQG2100×3600	23.8	21	≤25	0.074-0.6	6-29	JR137-8	210	43.2
MQG2100×4500	23.8	26	≤25	0.074-0.6	7.2-32	JR138-8	245	48.8
MQG2200×7500	22.8	28	≤25	0.074-0.6	9-40	JR158-8	380	68
MQG2400×3600	21.7	31	≤25	0.074-0.6	9-42	JR138-8	280	56
MQG2400×9000	21.7	45	≤25	0.074-0.6	10-50	YR6702-8	630	92
MQG2700×3600	21.4	39	≤25	0.074-0.6	13-145	TDMK400-32	400	86
MQG2700×4500	21.4	50	≤25	0.074-0.6	15-160	TDMK400-32	475	91
MQG3000×5400	19	58	≤25	0.074-0.6	20-180	TDMK500-36	630	113.5
MQG3200×3600	18.6	52	≤25	0.074-0.6	20-192	TDMK630-36	630	119
MQG3200×4500	18.6	65	≤25	0.074-0.6	30-210	TDMK800-36	800	127
MQG3200×5400	18.6	72	≤25	0.074-0.6	35-260	TM1000-36	1000	145
MQG3600×4500	17.3	88	≤25	0.074-0.6	30-230	TDMK1120-40	1120	159.7
MQG3600×5000	17.3	96	≤25	0.074-0.6	35-260	TDMK1250-40	1250	165
MQG3600×6000	17.3	117	≤25	0.074-0.6	38-280	TDMK1400-36	1400	182
MQG4000×6000	16.9	145	≤25	0.074-0.6	60-160	TDMK1800-40	1400	216
MQG4500×6000	15.6	180	≤25	0.074-0.6	80-550	TDMK2300-40	2300	269.6

General technical parameters table

Parameter	Specification
Series	MQ series energy-saving grid type (overflow type) ball mill
Type	Grid type / Overflow type
Structural features	High-end rolling bearing support replaces Babbitt bearing support
Lubrication method	Dry oil lubrication replaces thin oil lubrication, saving more than 70% of oil consumption
Cylinder rotation speed	15.6–45.8 r/min
Ball loading weight	0.56–180 t
Feed particle size	≤10mm (small model) / ≤25mm (large model)
Discharge particle size	0.074–0.8mm to 0.074–0.6mm
Output	0.15–550 t/h
Motor power	7.5–2300 kW
Weight	2–269.6 t
Core Advantages	Energy savings of 10-20%, capacity increase of over 20%, low operational resistance, and reduced equipment investment costs

Dimension Drawing and Key Dimensions: '[Image:/images/energy-saving-grid-overflow-ball-mill-dimension-drawing.webp]'

Material List

Component	Standard material	Optional material	Explanation
Cylinder	Carbon steel	Stainless steel	Internally embedded wear-resistant liner
Wear-resistant liner	High manganese steel, wear-resistant alloy	Rubber liner, ceramic composite	Replaceable, highly wear-resistant
Hollow shaft	Cast steel parts	Alloy steel	Good rigidity and strong load-bearing capacity
Bearing	High-end rolling bearing	Babbitt Alloy Bearing Shaft (Traditional)	Low operating resistance, energy saving 10-20%
Large gear	Casting gear hobbing machining	Alloy steel	Smooth transmission and long service life
Small drive gear	40Cr/20CrMnTi	Alloy steel	Carburizing and quenching ensures smooth transmission
Reducer	Hard-tooth surface reducer	Planetary gearbox	High transmission efficiency
Lubrication system	Dry oil lubrication	Thin oil lubrication (traditional)	Saves more than 70% of oil consumption, large mills do not require high- and low-pressure lubrication stations
Motor	Full copper coil motor	Explosion-proof motor	Standard three-phase asynchronous motor
Electric control system	Carbon steel / stainless steel	Rainproof and dustproof type	Fully automatic control

Installation method: Energy-saving grid type (overflow type) ball mills must be installed on a solid concrete foundation, which must bear the weight of the equipment and the dynamic load during rotation; ensure the foundation level meets the requirements during installation, and tighten anchor bolts according to the torque requirements; after placing the equipment, adjust the level to ensure the rotary part is coaxial with the transmission part; the transmission part (reducer, small transmission gears, motor) should be installed in order, adjust gear meshing gap to ensure smooth transmission; the hollow shaft is made of cast steel, and installation should ensure a firm connection with the cylinder; liners and wear-resistant plates should be installed in order and securely fastened, with no looseness; the lubrication system must be correctly connected, using dry oil lubrication, and the lubrication station should be debugged; after installation, a no-load test run should be conducted to check whether the cylinder rotates smoothly, whether there is abnormal vibration and noise, and confirm that the gears mesh and bearings operate normally; the load test run should gradually increase the feed amount and the ball load, observe the grinding effect and motor current, ensuring it does not exceed the rated current; a dust removal system should be equipped to reduce dust pollution; a central control system can be equipped to enable online monitoring and automatic control.

Application scenario table

Industry	Application	Recommended configuration	Key requirements
Ferrous metal ore dressing	Grinding of iron ore, manganese ore, etc.	MQG1200×2400–MQG4500×6000	Discharge particle size 0.074–0.8mm, high capacity, wear-resistant
Non-ferrous metal ore dressing	Grinding of copper, gold, lead-zinc ores, etc.	MQG900×1800–MQG3600×6000	Discharge particle size 0.074–0.6mm, energy-saving and efficient
Cement industry	Grinding of raw materials and clinker	MQG1500×3500–MQG4500×6000	Large processing capacity, stable operation, wear-resistant
Silicate products	Raw material grinding	MQG1200×2400–MQG2700×4500	Pollution prevention, controllable particle size
New building materials	Raw material and finished product grinding	MQG900×1800–MQG3200×4500	Large processing capacity, low energy consumption
Refractory materials	Material grinding	MQG900×1800–MQG2100×4500	Wear-resistant, uniform particle size
Fertilizer industry	Raw material grinding	MQG1200×2400–MQG2100×3600	Pollution prevention, corrosion-resistant
Glass and ceramics	Raw material grinding	MQG600×1800–MQG1500×4500	Pollution prevention, controllable particle size

Note: Energy-saving grid type (overflow type) ball mills are suitable for the production industries of ferrous and non-ferrous metal ore dressing, cement, silicate products, new building materials, refractory materials, fertilizers, as well as glass and ceramics. Feed size ≤10-≤25mm, discharge size 0.074-0.8mm to 0.074-0.6mm, output 0.15-550 t/h. The MQ series uses high-end rolling bearings instead of traditional Babbitt bearing shells, resulting in lower operating resistance, saving 10-20% energy, and increasing capacity by more than 20%; it uses dry oil lubrication instead of thin oil lubrication, saving over 70% in oil consumption. Large mills do not require high and low-pressure lubrication stations, reducing equipment investment costs. Explosion-prone environments require explosion-proof motors. For highly abrasive materials, it is recommended to use high manganese steel, wear-resistant alloys, or rubber liners.

Selection considerations (compared with rod mills and autogenous mills): The core differences between energy-saving grid type (overflow type) ball mills and rod mills or autogenous mills lie in the grinding medium, applicable materials, and grinding fineness. Energy-saving ball mills use steel balls as the grinding medium, suitable for ores and materials of various hardness, capable of grinding materials to 0.074-0.8mm or finer, with uniform discharge particle size and a capacity of 0.15-550t/h, widely used in grinding operations in concentrators. Rod mills use steel rods as the grinding medium, suitable for coarse and medium grinding, with relatively uniform product size, but the fineness is not as high as that of ball mills. Autogenous mills use the ore itself as the grinding medium, suitable for handling large ore blocks, omitting the intermediate and fine crushing operations, but with relatively small processing capacity. When selecting equipment, if fine grinding with strict discharge particle size requirements is needed, energy-saving grid type (overflow type) ball mills are preferred; for coarse grinding with uniform product size, rod mills can be considered; for simplified processes handling large ore blocks, autogenous mills can be considered.

Technical FAQ

1. What is an energy-saving grid type (overflow type) ball mill?

An energy-saving grid type (overflow type) ball mill is a key equipment for grinding materials after they are crushed, mainly used for dry or wet grinding of various ores and other materials, applicable to the production industries of ferrous and non-ferrous metal ore dressing, cement, silicate products, new building materials, refractory materials, fertilizers, and glass ceramics.

2. What is the working principle of an energy-saving grid type (overflow type) ball mill?

The motor drives the large rotating gear through a reducer and small transmission gears, causing the cylinder to rotate. Inside the cylinder, steel balls are lifted to a certain height by centrifugal force and friction and then fall, impacting and grinding the materials to the required fineness. In the grid type, materials are discharged through a grid plate; in the overflow type, materials are discharged through an overflow port.

3. What models of energy-saving grid type (overflow type) ball mills are available?

The MQG series ball mill models include MQG600×1800, MQG900×1800, MQG900×3500, MQG1200×2400, MQG1200×4500, MQG1300×4000, MQG1500×3500, MQG1500×4500, MQG1500×5700, MQG1500×6400, MQG1830×3600, MQG1830×4500, MQG1830×7000, MQG2100×3600, MQG2100×4500, MQG2200×7500, MQG2400×3600, MQG2400×9000, MQG2700×3600, MQG2700×4500, MQG3000×5400, MQG3200×3600, MQG3200×4500, MQG3200×5400, MQG3600×4500, MQG3600×5000, MQG3600×6000, MQG4000×6000, MQG4500×6000.

4. What is the output of the energy-saving grid type (overflow type) ball mill?

The output is 0.15-550 t/h, varying according to the model. MQG600×1800 is 0.15-0.6 t/h, and MQG4500×6000 is 80-550 t/h.

5. What is the motor power of the energy-saving grid type (overflow type) ball mill?

The motor power is 7.5-2300 kW, varying according to the model. MQG600×1800 is 7.5 kW, and MQG4500×6000 is 2300 kW.

6. What is the ball load capacity of the energy-saving grid type (overflow type) ball mill?

The ball load capacity is 0.56-180 t, varying according to the model.

7. What are the feed size and discharge size of the energy-saving grid type (overflow type) ball mill?

The feed size is ≤10-≤25 mm, and the discharge size is 0.074-0.8 mm to 0.074-0.6 mm, varying according to the model.

8. What is the cylinder rotation speed of the energy-saving grid type (overflow type) ball mill?

Cylinder rotation speed: 15.6-45.8 r/min, varying according to the model.

9. What are the product advantages of the MQ series ball mill?

The MQ series ball mill is structurally optimized based on the traditional ball mill technology. It uses high-end rolling bearing support instead of the traditional Babbitt bearing support, resulting in lower operating resistance, 10-20% energy savings, and more than 20% increase in capacity. It adopts dry oil lubrication instead of the original thin oil lubrication, saving over 70% of oil consumption. Even large mills do not require high- and low-pressure lubrication stations, reducing equipment investment costs.

10. What type of bearings does the energy-saving ball mill use?

High-end rolling bearings are used instead of the traditional Babbitt bearing support, resulting in low operating resistance and 10-20% energy savings.

11. What lubrication method does the energy-saving ball mill use?

It adopts dry oil lubrication instead of the original thin oil lubrication, saving over 70% of oil consumption. Even large mills do not require high- and low-pressure lubrication stations.

12. What are the wear parts of the energy-saving grid type (overflow type) ball mill?

Wear-resistant liners, large gears, small transmission gears, bearings, etc. Among them, wear-resistant liners are the core wear parts. It is recommended to use high manganese steel, wear-resistant alloy, or rubber liners.

13. Does the energy-saving grid type (overflow type) ball mill require a foundation?

Yes. It must be installed on a solid concrete foundation, which should bear the equipment's self-weight and dynamic load during rotation, and be fixed with anchor bolts.

14. What are common failures of the energy-saving grid type (overflow type) ball mill?

Liner wear (due to highly abrasive materials), bearing overheating (poor lubrication or overload), gear wear or poor meshing (transmission issues), abnormal vibration (imbalance of the cylinder or loose anchor bolts), and reduced output (insufficient ball load or severe liner wear).

15. Can the energy-saving grid type (overflow type) ball mill be used in ore dressing plants?

Yes. It is a core piece of equipment for grinding operations in ore dressing plants, used to grind ore to 0.074-0.8 mm or finer, providing qualified material for subsequent separation processes.

16. Can the energy-saving grid type (overflow type) ball mill be customized?

The cylinder specifications, ball load, motor power, liner material (high manganese steel/wear-resistant alloy/rubber), motor configuration (explosion-proof motor), dust removal system, electrical control system, and central control system can be customized.

17. What is the difference between an energy-saving ball mill and a rod mill?

The energy-saving ball mill uses steel balls as the grinding medium, suitable for ores and materials of various hardness, and can grind materials to 0.074-0.8 mm or finer, with uniform discharge particle size; the rod mill uses steel rods as the grinding medium, suitable for coarse and medium grinding, with fairly uniform product size, but the fineness is not as high as that of a ball mill.

18. What is the difference between an energy-saving ball mill and a autogenous mill?

The energy-saving ball mill uses steel balls as the grinding medium, suitable for ores and materials of various hardness, with a capacity of 0.15-550 t/h; the autogenous mill uses the ore itself as the grinding medium, suitable for processing large block ore, omitting the medium and fine crushing operations, but the processing capacity is relatively small.

19. Do energy-saving grid type (overflow type) ball mills comply with RoHS and REACH?

Standard equipment complies with RoHS and REACH regulations and does not contain SVHC high concern substances. Refer to the product test report for details.

20. How to select the model of an energy-saving grid type (overflow type) ball mill?

Determine suitability based on material type and hardness, select the corresponding model based on feed size and discharge size requirements, choose a model within the 0.15-550 t/h range according to production line capacity, select a motor from 7.5-2300 kW based on processing capacity and material hardness, and choose a ball load of 0.56-180 t according to cylinder specifications and material characteristics.

Technical FAQ

What should be included in a mill or dryer RFQ?

Include feed size, moisture, throughput, final size, heat source or power supply, operating hours and dust-control requirements.

How are wear and energy costs controlled?

Use the correct feed size and operating range, monitor liners or hammers and keep airflow, lubrication and loading stable.

Authoritative references

For standards and safety context, see ISO standards and the U.S. Mine Safety and Health Administration. Confirm the exact local requirements for your project.

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