Raymond mill processes furnace slag

• Publication time：2025-08-29
• Click：20

Raymond Mill and Slag

The Raymond mill operates on the principle of suspension roller grinding. Under the action of centrifugal force, the grinding roller rolls and presses against the grinding ring, crushing the material into powder. It is suitable for small and medium-scale production, capable of producing fine powder with a fineness of 200 - 400 mesh, which meets the requirements of cement and concrete production. Grinding water-quenched granulated blast furnace slag into slag micropowder is the core of realizing the resource utilization of slag.

Advantages of Processing Slag with Raymond Mill

Mature and Stable Technology

The Raymond mill features mature technology, reasonable structural design, high stability, and convenient operation and maintenance, which reduces labor and time costs and improves equipment utilization.

Relatively Low Energy Consumption

Adopting the material bed grinding principle, it has high energy utilization efficiency. Compared with ball mills, the system power consumption can be significantly reduced, conforming to the concept of energy conservation and emission reduction.

Convenient Adjustment of Product Fineness

The fineness of the product can be changed by adjusting the rotation speed of the analyzer online without stopping the machine, which can quickly respond to market changes and improve the competitiveness of enterprises.

High System Integration

The entire production system has a compact layout and a small footprint, reducing material transportation loss and energy consumption, facilitating equipment installation, commissioning, and maintenance, and improving system stability and reliability.

Moderate Investment Cost

Compared with large-scale equipment such as vertical mills, the investment cost of the Raymond mill production line is lower, which is suitable for small and medium-sized enterprises. Moreover, the operation and maintenance costs are low, and the investment return rate is high.

Process of Processing Slag with Raymond Mill

Feeding System

The raw material silo stores granulated blast furnace slag. The bucket elevator lifts the material to a certain height, and the electromagnetic vibrating feeder or belt scale uniformly and continuously feeds the material into the main machine of the Raymond mill to ensure stable grinding efficiency and product quality.

Grinding System

After the material enters the main machine, the grinding roller rolls and presses against the grinding ring under the action of centrifugal force. The scraper shovels the material into the gap between the grinding roller and the grinding ring, and the material is crushed into fine particles. The air flow generated by the blower blows up the fine powder, preparing for subsequent classification and collection.

Classification System

The analyzer is composed of high-speed rotating blades. When the material passes through, it is affected by centrifugal force and air flow. The powder with qualified fineness passes through the blade gap to become the finished product, while the coarse particles fall back to the grinding disc for re-grinding. The fineness of the finished product can be controlled by adjusting the rotation speed of the analyzer.

Collection System

The powder-containing air flow first enters the cyclone collector, where most of the finished powder is separated by centrifugal force and gravity; the ultra-fine powder is captured by the pulse bag filter, and the discharged air reaches the standard, improving the product recovery rate.

Finished Product Storage and Packaging

The finished slag micropowder is sent to the finished product silo for storage through equipment such as screw conveyors and elevators. There are two delivery methods: bulk and bagged, to meet the needs of different customers.

Key Points of Processing Slag with Raymond Mill

Grindability of Materials

Blast furnace slag has poor grindability, which requires high wear resistance of wear parts such as grinding rollers and grinding rings. It is necessary to select spare parts made of high wear-resistant materials and conduct regular inspection and replacement.

Equipment Wear

Slag has high hardness and will seriously wear parts such as grinding rollers, grinding rings, and scrapers. It is necessary to establish an equipment maintenance system and optimize operating parameters to extend the service life of the equipment.

Iron Removal

Slag contains a small amount of metallic iron, which will damage the internal structure of the mill. It is necessary to add an iron remover before grinding to protect the equipment.

Summary

The Raymond mill can realize the efficient resource utilization of blast furnace slag. In the process of producing slag micropowder, it has the advantages of low energy consumption, easy adjustment of fineness, high integration, and moderate investment. However, key issues such as poor grindability of materials, equipment wear, and iron removal need to be focused on.