Rod mill
The rod mill is a rotating drum that causes friction and attrition
between steel rods and ore particles. Rod mills are less common
than ball mills for grinding minerals.The rods used in the mill,
usually a high-carbon steel, can vary in both the length and the
diameter. However, the smaller the rods, the larger is the total
surface area and hence, the greater the grinding efficiency.
Product details:
| Material: | SUS316/SUS304/ CARBON STEEL ,ETC | Heating Source: | Steam / Electrical / Natural Gas Diesel / Etc |
| Temp.: | 100-500℃ | Water Evaporation: | 5-2000kg |
| Control System: | PLC+HMI / Button Control | Motor: | ABB /Siemens/SEW |
1. Usages
Widely used in mineral processing, chemical, building materials and
other industrial sectors, as a variety of ore or other abrasive
materials for grinding purposes.
2. How it works
The mill is edge driven and center discharge type. When the machine
body is rotating, the hard grinding body is driven by the friction
force to continuously carry out ejection movement. The material is
highly ground due to the impact and grinding of the moving abrasive
body. The crushed material is discharged through the discharge
spiral drum.
3. Structural features
The mill is mainly composed of rotary part, main bearing, feeding
device and transmission device. This machine is a rod mill, the
discharge is at the big gear end of the transmission device.
3.1. Turning part: it is composed of cylinder made of steel plate
by rolling welding and two end covers connected by bolts. A lining
plate is arranged in the cylinder body to protect the cylinder body
and the end cover. In order to check and replace the parts in the
mill barrel and install the grinding body into the mill, the mill
is equipped with a grinding door. The two hollow end covers are
connected with the two ends of the barrel through the flange. The
plane of flange plate and the Journal of hollow end cover require
high machining accuracy. When the end cover is a small end cover,
there is a flange connecting the big gear on the cylinder body. The
processing of the cylinder flange also requires high precision, and
the rotating part of the cylinder is supported on two main
bearings.
3.2. The main bearing is not only able to bear the weight of the
whole mill, grinding body and materials, but also affected by the
moment resistance when the mill rotates. In order to reduce the
friction moment, energy consumption, cooling and lubrication
workload, and maintenance convenience, the main bearing has been
changed into a double row radial spherical roller bearing.
3.3. Feeding device: feeding spiral drum.
3.4. Discharge device: discharge spiral drum.
3.5. Transmission device: the motor and reducer drive the pinion of
the transmission bridge through the coupling, and the pinion
engages with the big gear fixed in the rotating part to make the
mill rotate. The transmission arrangement of the mill shall not be
changed at will. If it cannot be changed for some reason, the force
of the pinion on the big gear must be guaranteed to be always
upward. If the rotation direction of the mill is changed, the
directional parts of the rotating part of the mill shall be changed
accordingly.
3.6 Technical parameters of bar mill
Specification | Model | Effective volume (m3) | Cylinder RPM (r/min) | Bars load weight (t) | Motor | Weight (t) |
Model | Power(kw) |
| MB0918 | φ900×1800 | 0.9 | 35.4 | 2.5 | Y255M-8 | 22 | 5.6 |
| MB0924 | φ900×2400 | 1.2 | 35.4 | 3.55 | Y250M-8 | 30 | 6.9 |
| MB1224 | φ1200×2400 | 2.2 | 27.75 | 4.8 | Y280M-8 | 45 | 13.7 |
| MB1530 | φ1500×3000 | 5 | 26 | 8 | JR125-8 | 95 | 16.7 |
| MB2130 | φ2100×3000 | 9 | 20.9 | 24 | JR136-8 | 180 | 49.1 |
