VRM type slag vertical mill production line with an annual output of 300,000 tons
VRM type slag vertical mill production line with an annual output of 300,000 tons

1.  Project Overview

The project relies on the abundant slag resources of Jiangsu Shagang and the low cost of the canal channel to process ore powder and supply it to the local batching plant.

2.  Design parameters: 

Processing material: slag

Feed particle size: <10mm

Finished particle size: specific surface area 420

Finished water content: <1%

Capacity: 58 tons/hour

Equipment composition: a VRM2800S vertical mill (1800kw), feeder, elevator, raw material bin, screw feeder, vertical mill, dust collector, fan and control cabinet, etc.

3.  Process flow:

The raw slag of the vertical slag mill first enters the feeding bin, and then is conveyed to the vertical roller mill by the conveyor belt. Inside the mill, the slag raw material rotates with the grinding disc, and at the same time slowly moves to the edge of the grinding disc under the action of centrifugal force. be dried.

The finer slag particles are sent to the separator for sorting, while the coarser particles are returned to the grinding disc for further grinding. The fine powder that meets the requirements is sent to the dust collector for gas-powder separation. The finished product enters the bulk warehouse, and the exhaust gas is discharged after being silenced by the fan. Some extra-large particles of slag enter the external circulation system through the slag discharge port, and are sent to the inside of the mill by the elevator after iron removal treatment for re-grinding.

4.  Advantages and features:

1. The running resistance of the grinding roller is small and the energy consumption is low

The slag vertical mill adopts conical grinding rollers. During the grinding process, the friction between the grinding roller and the grinding disc is mainly rolling friction, which reduces the energy consumption and prolongs the life of the grinding roller and the grinding disc.

2. Horizontal grinding disc, the center blanking cloth is uniform

3. Perfect loading system

The slag vertical mill adopts a liquid-air combined spring-loading system, so that there is almost no metallic contact between the components of the vertical mill during the entire grinding process.

4. Greatly reduce energy consumption

Compared with the traditional tube grinding system, the slag vertical mill can save 45-60% of the electric energy, and the grinding material can save 35-40% of the electric energy.

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