What is the reason why the mineral powder vertical grinding mill returns a lot of material?

 As a benchmark enterprise in China's powder equipment manufacturing industry, Guilin Hongcheng produces mineral powder vertical mills that are used in cement clinker, electric power, metallurgy, chemical industry and other fields. The mineral powder vertical mills have performed well since they were put into production and have been well received by customers. However, Recently, some customers have come to inquire about the reason why vertical mineral powder grinding mill returns so much return material? Solve the problem together through the answers from our professional sales engineers in Guilin Hongcheng.

Working principle of mineral powder vertical mill working to screen materials

After the slag is dried and ground, it is sucked into the powder separator from the grinding disc under the action of the wind in the mill. The static blades installed on the powder separator will guide the dust-laden air from the upward airflow to the tangential airflow, and the rotation direction of the rotor is consistent with the direction of the tangential airflow. There is centrifugal force in the gap between the static blades and the moving blades, and the dust is screened in this area. Larger particles are thrown out and fall into the silo under the action of gravity, and are sent back to the vertical mill for reprocessing. The finished product enters the outlet of the upper housing of the powder separator through the rotor with the air flow, and leaves the powder separator.

There are many reasons and countermeasures for the return of mineral powder vertical grinding mill

(1) The fineness of the output grinding powder depends on the adjustment of the static blade direction and rotor speed of the powder concentrator. If the stator blades are adjusted outward (larger tangential force) and the rotor speed is increased, finer ore powder will be produced; otherwise, coarser ore powder will be produced. If the outward adjustment of the stator blades is too large and the ore powder produced is fine, then the vertical grinding of ore powder will return a lot of material, so the machine must be shut down and the stator blades adjusted inward for a test run.

(2) Adjust the rotor speed when the system air volume and air pressure are stable. If the rotor speed is too fast, the fineness of the finished product will be finer, so there will be more material returned by the vertical mineral powder grinding mill.

(3) When all parameters are stable, if the rotor speed is adjusted, the fineness of the ore powder will not change significantly. The wear and tear of the upper powder concentrator is the main reason for the large amount of material returned by the vertical grinding of mineral powder, and the unstable operation of the central control system is the secondary reason. Focus on the inspection and repair of the vertical mill powder separator. Seriously worn stator blades can be inspected or repaired and welded with strong ribs.

 A piece of high-quality equipment can save you 90% of maintenance troubles.

To sum up, we basically understand the specific reasons why vertical mineral powder grinding mill returns a lot of material. If a piece of equipment breaks down and needs to be repaired continuously, the maintenance cost will be high for companies that stop operations and production. So choose Guilin Hongcheng Vertical Mill.,it is easy to maintain and has low operating costs. The grinding roller can be turned out of the machine with a hydraulic device. There is a large space for replacing the roller bushings and linings and for mill maintenance. It also uses wear-resistant materials and has a long service life. Hongcheng vertical mineral powder mill has high grinding output, low power consumption and dust collection rate. It is an energy-saving, efficient and environmentally friendly ore powder making equipment. Welcome to inquire about the quotation of mineral powder vertical mill.