Dry rod mill

Advantages and Features

1. The grinding particle size of dry rod mill is uniform, and the product particle size performance in open circuit grinding operation is almost the same as that of ball mill in closed circuit grinding operation. 2. Using mature controllable feeding and discharging technology, combined with the actual user’s grinding materials and matching the appropriate grinding body, the previous surface contact is changed to line contact, making the discharging particle size of the rod mill more uniform. 3. The discharge particle size of the dry rod mill can be adjusted according to customer needs. It is equipped with a fineness control device, and a screening device can be added to the discharge to ensure that neither over-grinding nor substandard products are mixed into the finished product. 4. The material particle size characteristics of the dry rod mill are related to the grinding conditions. When the steel rod collides and rubs against the ore, the coarse material will be ground first, and then the smaller ore particles will be ground, thus reducing the phenomenon of over-crushing. 5. When the steel rod rises along the lining plate, the coarse particles are sandwiched between them, like a bar screen, allowing the fine particles to pass through the gaps between the rods. This is also conducive to crushing the coarse particles and concentrating the coarse particles in the grinding area of ​​the steel rod. Therefore, the products of the rod mill are more uniform.

Working Principle

The working principle of the dry rod mill is the same as that of the wet rod mill. It drives the cylinder to rotate through the motor and peripheral large gear reduction transmission. The cylinder is equipped with appropriate grinding media – steel rods. The grinding medium is lifted to a certain height under the action of centrifugal force and friction, and then falls down in a falling or leaking state. The ground material continuously enters the inside of the cylinder from the ore feeding port, is crushed by the moving grinding medium, and is discharged out of the machine through overflow and continuous ore feeding force for the next step of operation.

Technical Specifications

Case Study

Huston dry rod mill is mainly responsible for the open circuit grinding operation in a sand and gravel plant in Shandong. The ore feeding particle size is 45mm, the ore discharge particle size is 0.21mm, and the processing capacity is 145t/h. The overall effect is good and the processing capacity is strong. No faults have occurred so far.