In today's mineral processing plants, energy-saving ball mills for mineral processing can often be seen. Whether it is a metallic ore or a non-metallic ore, as long as the useful minerals are in a fine-grained state, they must be ground to a finer particle size in order to separate the useful minerals from the gangue minerals. Crushing equipment alone cannot achieve this particle size. If required, the mineral processing energy-saving ball mill undertakes the grinding operation after crushing to make the material reach the expected fineness. So, how does it work and what are its significant advantages?
The mineral processing energy-saving ball mill is mainly composed of a cylinder, an end cover, a bearing, a transmission part, etc. Its working principle is that when the material enters the mill cylinder through the hollow shaft of the feed, the stepped lining or corrugated lining in the bin is equipped with steel balls of different specifications. The cylinder rotates under the drive of the motor, generating centrifugal force, bringing the steel balls to a certain height and then falling, which produces a heavy impact and grinding effect on the material. After the material reaches the expected fineness in the cylinder, the powder is finally discharged through the discharge grate plate, thus completing the entire grinding operation.
For example, the diameter of a mineral processing energy-saving ball mill with an output of 100 tons per hour is approximately between 2.4m and 3.2m. During the working process, the material is repeatedly hit and ground by steel balls of different specifications in the cylinder, and is gradually ground into powder. This ball mill can adapt to the grinding of various non-flammable and explosive metal or non-metal materials, especially when grinding gold, iron, copper, feldspar and other materials.
According to different grinding methods, the energy-saving ball mill for mineral processing can be divided into dry mineral processing ball mill and wet mineral processing ball mill. When the dry ball mill is working, the material is taken out by the air flow drawn out of the cylinder; the wet ball mill has water flow involved in the grinding process, and the movement of the ore is driven by the water flow. The material is gradually crushed under the impact and grinding action, and the crushed ore is discharged out of the cylinder through the discharge part. After the discharged minerals are classified into qualified products in the spiral classifier, the coarse sand can be returned to the ball mill through the combined feeder for further grinding.
According to different discharge methods, the energy-saving ball mill for mineral processing can be divided into a grid type ball mill and an overflow type ball mill. The grid type mineral processing ball mill is equipped with a forced discharge device at the discharge end, which is suitable for coarse grinding operations; the overflow type mineral processing ball mill relies on the material in the cylinder to gather more and more and finally discharge by gravity, so it is more suitable for fine grinding operations.
1. Reduce energy consumption
Mineral processing energy-saving ball mills usually use large double-row spherical roller bearings instead of traditional sliding bearings, which greatly reduces friction. Moreover, mineral processing energy-saving ball mills have low starting current, short starting time, and flexible starting. The normal working current drops by 20%-30%, which greatly reduces the power of the original motor and the installed capacity compared with ordinary ball mills, thus achieving the purpose of saving electricity. After a certain mining company used energy-saving ball mills, the monthly electricity consumption was reduced by thousands of degrees compared with ordinary ball mills, and the annual energy consumption cost was reduced by millions of yuan, greatly reducing the production cost.
2. Improve efficiency
Mineral processing energy-saving ball mills make full use of surplus motor capacity and improve liner structure, which can increase production by 5%-7%. Changing sliding bearings to rolling bearings not only has a large load-bearing capacity and a long service life, but also can increase the service life by more than 5 compared with sliding bearings.
3. Reduce maintenance rate
Mineral processing energy-saving ball mills use glycerin lubrication series, which reduces the facilities of thin oil stations and motor power, and reduces the amount of fuel saving by 80%-90%. At the same time, the maintenance of the main bearing is reduced, the sanitary environment is improved, and there is no oil stain pollution. The normal service life of the main bearing is 8-13 years, which greatly reduces the maintenance cost and downtime compared with ordinary ball mills.
4. Fully grind the material
The new mineral processing energy-saving ball mill adds a drive device on the side. This design allows the horizontal cylinder to rotate more smoothly. In the process of continuous rolling, the minerals in the cylinder and the grinding body can fully contact and collide, thereby achieving more complete grinding and making the grinding particle size more uniform.
5. High degree of automation
The improved new ball mill divides the process into stages, adds small-sized spirals, can pre-grade coarse-grained stones into ball mills, automatically complete the coarse-grained stone backsand and cyclone work, ensure the normal operation of the ball mill system, and greatly reduce the difficulty and workload of manual backsanding. In addition, according to the specifications of the material, the relevant parameters can be input through the control panel to automatically control the rotation speed and time of the drum, realize automatic and efficient ultra-fine grinding, reduce labor intensity, and ensure product quality.
6. Strong processing capacity
The new energy-saving ball mill for mineral processing has added a forced discharge device at the discharge end, and enlarged the discharge port, which greatly increased the discharge volume and significantly improved the production capacity. Compared with the traditional ball mill, the processing capacity has increased by 40%.
7. Easy installation
The small mineral processing ball mill with a diameter of less than 2.1 meters is designed as an integral frame. This design greatly facilitates civil construction and equipment installation. The whole machine is installed and debugged before leaving the factory. After the equipment arrives at the site, it can be easily installed and put into grinding production as soon as possible.
In short, the mineral processing energy-saving ball mill plays an important role in the grinding operation of the mineral processing plant. It has the advantages of low energy consumption, high degree of automation, and strong processing capacity. It is a grinding equipment often used in mineral processing plants today. The mineral processing energy-saving ball mill produced by Xinhai Mining has more advantages in energy saving. If you need it, please contact us.
