Rod mill introduction
The rod mill is available in both dry and wet versions and can be selected according to customers' actual situation.
Fote Machinery adopts advanced controllable feeding and discharging technology. Combined with the actual grinding material, the rod mill is equipped with suitable grinding medium, and the traditional surface contact is changed into line contact, which makes the discharge granularity more uniform with higher capacity.
It is widely used in the grinding operation which has a higher demand for the uniformity of the finished product, such as the refractory industry, chemical industry, metallurgy, glass and other industries. In recent years, it has also been used in the sand making industry for construction sand.
Rod mill produced by Fote
The rod mill is characterized in that during the grinding process, the grinding medium is in line contact with the ore and thus has a certain selective grinding action.
The product has a relatively uniform particle size and less pulverized ore particles. When used for rough grinding, the rod mill is processed in a larger amount than a ball mill of the same specification and vice versa.
Application fields of rod mill
Applications of rod mill
According to the crushing characteristics of the rod mill, its application ranges are as follows.
1. Used for grinding rare metal ore
For gravity separation plants or magnetic separation plants of tungsten-tin ore and other rare metal ores, in order to prevent excessive pulverization of valuable minerals, a rod mill with a light pulverization is often used in the coarse grinding stage.
2. It can replace the cone crusher for fine crushing
When dealing with softer or less hard ore, especially if the ore contains more clay and is more viscous, using a cone crusher for fine crushing is not only dusty but also easy to cause the crusher to block. If a rod mill is used instead of cone crusher, it can grind ore from 20-30 mm to 6-10 mesh, which reduces costs and simplifies fine dust removal.
For hard ore, whether using a rod mill or cone machine plus screening with closed circuit must be determined based on the actual situation.
Rod mill advantages
Advantages of rod mill
1. Saving driving power
Compared with older equipment, the rod mill saves more than 40% of power, reducing a lot of costs.
2. Even output capacity
Rod mill machine with advanced technology, can grind materials selectively, with increases capacity of almost 50%.
3. Finely finished particle size
The particle size is relatively uniform and there are few over crushed particles, which meet the standard of the customers.
4. High efficiency
The processing capacity of the rod mill is bigger and more efficient than ball mill for the coarse crushing on the same specifications.
5. Advanced technology
Adopting advanced output controllable technology and combination with customer's actual grinding material, FTM company uses the proper grinding material bar that grinding media can contact with the ore in a line way in the grinding process.
Rod mill features
Rod mill on working site
- 1 The rod mill usually uses a steel rod with a diameter of 50-100 mm as a grinding medium. The length of the steel rod is 25-50 mm shorter than that of the cylinder, and is usually made of high carbon steel containing 0.8%-1% carbon.
- 2 The loading amount of the rod is about 35%-45% of the effective volume of the rod mill. When observed, the horizontal plane of the rod is about 100-200 mm below the centerline of the cylinder.
- 3 The ratio of the length of the rod mill to the diameter is generally 1.5-2.0, and the inner surface of the liner on the end cap should be a vertical plane. The purpose is to prevent and reduce the chaotic movement, bending and breaking of the steel rod in the cylinder to ensure that the steel rod moves regularly.
- 4 The rod mill does not use grid plate for mine discharge, but uses overflow type and open type discharge; the diameter of the hollow journal of the discharge end is generally larger than that of the same size ball mill.
- 5 The rotation speed of the rod mill should be lower than the working speed of the ball mill of the same specification, so that the medium inside is in the sloping state.
Rod mill working principle
Working principle of rod mill
Rod mill makes tube run with the help of the reduction gears drove by dynamo or the low-speed synchronization electrical machine. There are steel rods in the tube which are thrown at a certain high speed by centrifugal and friction force and then fall.
The ground material enters into the tube continuously and is crushed by the moving steel balls. After that, they are discharged from the machine naturally and will start the following working process next.
Rod mill manufacturers in China
Different types of rod mills produced by FTM
Henan Fote Heavy Industry has been focusing on R&D and manufacturing of rod mills for 37 years. We have professional technical consultants and a one-stop after-sales service team for production, installation and commissioning, so that you can enjoy the whole process of pre-sales and after-sales.
The rod mill produced by Fote Machinery, Henan, China integrates research and development, production, processing and matching. We have rich experiences, and the products are exported to the United States, India, Russia, Indonesia, South Africa and other countries and regions, with a good market reputation.
Therefore, customers said that they can work for a long-term mutual benefit and win-win future together with us. For example, in October 2018, a large new building materials company in South Africa directly found Fote Heavy Machinery through recommendation and hoped that we could equip a steel slag processing production line for them.
For details, please refer to the following customer cases.
Customer case-steel slag processing production line of South Africa
Feedback from South Africa customers
In October 2018, the steel slag treatment production line deployed by Fote for a large new building materials company in South Africa was officially put into operation.
In the process of preparing new steel materials, the steel slag treatment rate reached 99%, and the quality of new building materials was superior. The comprehensive energy consumption is reduced significantly.
Due to the high degree of automation of the steel slag rod mill, the original operation line has a capacity of 40 people, and has been reduced to 15 laborers, which has truly simplified the operation mode of the assembly line.
More than a year later, due to the super-level performance of the MBS steel slag rod mill, the company's production line revenue increased steadily, while reducing the secondary pollution of waste slag gas, the economic income generated at the same time solved the environmental pollution problem of the production line.
Note: Steel slag is currently the most common application in building materials. It is characterized by high hardness, high strength and certain gelation properties, and the steel slag is processed and used as aggregate.
The recycling of steel slag can solve the contradiction between aggregate supply and demand, and at the same time improve the engineering performance of concrete materials and reduce the cost.
Shell Specifications （mm）
|Shell rotation speed
Shell Specifications （mm）