Ore Processing

Rod Mill

MB series rod mills are widely used in metal and non-metal mines, water conservancy, glass and building materials departments to grind various ores, rocks and artificial sand, etc., which require uniform product particle size and less over-sand materials. The high-efficiency and energy-saving rod mills produced by our company all use rolling bearings to replace the bearing and sliding bearing support. Under the same working conditions, energy saving can be 10%-20% and production capacity can be increased by 10%-20%.

Overall dimensions: 0.9m-3.6m

Effective volume of cylinder: 1.15-50 m³

Rod loading:3-90 t

Cylinder speed:15-38 r/min

Power: 30-800 kw

Discharge size: 5-0.2 mm

Production:3-300 t/h

Weight: 6-200 t

Description

Rod mill is a common material grinding equipment, widely used in mining, building materials, chemical industry and other fields. It is mainly composed of feeding device, cylinder, grinding medium, discharging device and transmission device. When working, the motor drives the cylinder to rotate by the transmission device, and the steel rod in the cylinder rises with the cylinder and falls due to gravity, impacting and grinding the material. At the same time, the sliding and rolling of the steel rod further knead the material to make it fine. Rod mill has significant advantages, less over-crushing phenomenon, uniform product particle size, large processing capacity and strong adaptability, and can meet the grinding needs of different materials by adjusting multiple parameters. According to the discharge method, it can be divided into overflow type and open type; according to the transmission method, it can be divided into center transmission and edge transmission. With these characteristics, rod mill provides strong support for efficient grinding of materials in various industrial production.
Rod Mill

Features

High grinding precision

The rod mill uses steel rods as grinding media and is in linear contact with the material. It has a strong selective crushing ability for the material during grinding, can accurately control the degree of material crushing, effectively reduce the phenomenon of over-crushing, retain the original characteristics of the material to the greatest extent, and improve product quality.

Good particle size uniformity

The steel rods are arranged and moved regularly in the cylinder, so that the material is evenly stressed during the grinding process, and the particle size distribution of the output product is concentrated and uniform, which can provide raw materials with stable particle size for subsequent industrial production.

Powerful processing capacity

The structural design is reasonable, which can adapt to larger feed particle size, can handle materials of various hardness, and has high production efficiency. It can meet the needs of large-scale production and play a key role in mining, building materials and other industries.

High operational flexibility

By adjusting the parameters such as the diameter, length, filling rate of the steel rod, the speed of the mill, and the feed amount, it can easily adapt to the grinding requirements of different materials. Whether it is ore, rock or artificial material, it can efficiently complete the grinding task.

Working Principle

Rod Mill
When the rod mill is working, the motor is used as the power source to transmit the power to the cylinder through the transmission device. The transmission device is generally composed of a reducer, a coupling and a large gear. The high-speed rotational motion output by the motor is reduced in speed and increased in torque by the reducer, and then transmitted to the large gear by the coupling. The large gear is tightly meshed with the gear ring on the cylinder, thereby driving the cylinder to rotate stably at a suitable speed. The cylinder is filled with steel rods as grinding media. When the cylinder rotates, the steel rods climb upward with the cylinder under the combined action of centrifugal force and friction. As the steel rods continue to rise, the circumferential speed of their position gradually increases. When the steel rods rise to a certain height and the centrifugal force they are subjected to is less than gravity, the steel rods will fall from a high place under the action of gravity, which will have a strong impact on the materials in the cylinder. At the same time, during the continuous rotation of the cylinder, sliding and rolling will occur between the steel rods, which will grind and knead the materials in detail. As the feeding device continuously delivers the material and the discharging device continuously discharges the ground material, the material is continuously subjected to the multiple actions of the steel rods in the cylinder and is finally crushed to the required particle size before being discharged from the mill.

Techspecs

Main Technical Parameters

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ModelCylinder size (D×L) (mm)Effective volume (m³)Balls weight (t)Rotary speed (r/min)Power (kw)Discharge size (mm)Capacity (t/h)Weight (t)
MB0918φ900×18000.852.338225-0.26-1.66.2
MB0924φ900×24001.153.138305-0.210-2.96.6
MB1224φ1200×24002.26.532555-0.215-513.5
MB1530φ1500×30005827755-0.220-516.7
MB1830φ1800×30006.51722.81325-0.240-1029.8
MB2122φ2100×22006.71820.91605-0.280-1042.5
MB2130φ2100×30009.22520.91605-0.290-1543.9
MB2136φ2100×360011.02820.92005-0.2100-2049.4

Application & Case


Application fields:

Metal mines, non-metal mines, construction materials, artificial sand making, refractory material processing, chemical industry, water conservancy and hydropower industry, glass industry

Applicable materials:

Iron ore, copper ore, gold ore, quartz, diabase, dolomite, calcite, granite, basalt, sandstone, refractory materials, concrete aggregate, steel sand, slag, asphalt aggregate glass, etc.

Mining industry

Ore grinding: used to grind various ores mined, such as copper ore, iron ore, gold ore, etc., so that useful minerals and gangue minerals are fully dissociated, and provide raw materials of suitable particle size for subsequent mineral processing operations such as flotation, magnetic separation, and gravity separation, so as to improve the recovery rate of mineral processing.

Preparation of mineral powder: Grind the ore into fine powder to meet the requirements of subsequent processing technologies such as mineral powder sintering and pelletizing, so as to further refine metals or produce other mineral products.

Building materials industry

Cement production: Grind cement raw materials such as limestone, clay, and iron ore to achieve the specified fineness, provide qualified raw materials for the calcination and grinding process of cement, and ensure the quality and performance of cement. At the same time, in the cement grinding stage, rod mills can also be used to grind cement clinker with mixed materials such as gypsum into finished cement products.

Glass manufacturing: used to grind glass raw materials such as quartz sand and feldspar to make them uniform in particle size, which is conducive to the melting and clarification of glass and improves the quality and transparency of glass.

Chemical Industry

Grinding Chemical Raw Materials: Grinding various chemical raw materials, such as calcium carbonate, talcum powder, graphite, etc., to produce chemical products of different fineness, meeting the particle size requirements of fillers and additives in industries such as plastics, rubber, coatings, and inks.

Preparing Catalysts: In the production process of catalysts, rod mills can grind catalyst raw materials to increase the specific surface area of raw materials, improve the activity and selectivity of catalysts, and make chemical reactions more efficient.

Power Industry

Grinding Coal Powder: Grinding coal into coal powder provides fuel of suitable particle size for boiler combustion in thermal power plants, so that coal can be fully burned, improve power generation efficiency, and reduce energy consumption and pollutant emissions.

Other Industries

Ceramic Industry: Used to grind ceramic raw materials, such as kaolin, quartz, feldspar, etc., to prepare ceramic blanks with uniform particle size and stable performance, ensuring the quality and performance of ceramic products.

Refractory industry: Grind refractory raw materials such as bauxite and magnesia to produce refractory aggregates and powders that meet the requirements, which are used to manufacture various refractory bricks, refractory castables and other refractory products.

FAQ

It may be that the equipment is not installed stably, the foundation is not compacted or the anchor bolts are loose; it may also be that the steel rods inside the cylinder are unevenly loaded, resulting in a shift in the center of gravity; in addition, gear wear and bearing damage can also cause abnormal vibration.
It needs to be selected according to the hardness, particle size and output requirements of the material to be ground. Generally, steel rods with large diameters are selected for materials with high hardness; the steel rods need to be thickened accordingly for large feed particle sizes; when the output is large, the number and length of steel rods can be appropriately increased.
Regularly check whether the connecting bolts of each component are loose and tighten them in time; pay attention to the wear of the steel rods, and replace them when they are severely worn; regularly add lubricating oil to lubrication parts such as bearings; and clean up the dust and debris on the surface and inside of the equipment.
First check whether the feeding system is blocked and whether the material supply is normal; then check the wear degree of the grinding medium steel rod. Excessive wear will reduce the grinding efficiency. At the same time, check the ventilation system. Poor ventilation may cause material discharge to be blocked, thereby affecting production.

Customize large scale mining equipment with affordable cost

STCrushers provides high quality and reliable mining equipment customize manufacturing service for global customers, we design the production line according to the needs of the customer's processed materials and output, and realize fully automatic production from feed to discharge.

20 years of experience


We have more than 20 years of experience in the production of large mining equipment.


Professional production and R&D team

We have an experienced production line design team to meet the processing needs of different materials.

Advanced production facilities

We have two large workshops, a variety of processing equipment and machine tools.


Competitive prices


The company strives to provide customers with preferential prices and payment methods to meet customer needs.

Send an Inquiry

If you are looking for mining equipment such as stone crushers, ball mills, rotary dryer, rotary kiln and other equipment, feel free to contact us and our team will reply within 48 hours.

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Gongyi City, Henan Province, China

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