Coal-based activated carbon is manufactured through a series of processes including carbonization, cooling, activation, and washing. Its appearance is generally black cylindrical activated carbon or irregularly shaped coal-based granular activated carbon, also known as crushed carbon. It features a well-developed pore structure, good adsorption performance, high mechanical strength, easy regeneration, and low cost; it is widely used in the purification of toxic gases, waste gas treatment, purification of industrial and domestic water, and solvent recovery.

Customer Background

The customer company is a state-owned high-tech activated carbon enterprise in Shanxi Province. Its main business includes the research, development, production, sales, application, and regeneration of activated carbon products. It produces 50,000 tons of various high-quality activated carbon annually, including coal-based briquette carbon, raw coal crushed carbon, bituminous coal columnar carbon, and coal-based powdered carbon. Advanced production technology will play a significant role in improving the quality of activated carbon and leading its upgrading, also providing a strong guarantee for the sustainable development of activated carbon.

Project Background

Processed Material: Bituminous Coal

Finished Product Use: Activated Carbon

Equipment Used: Shibang Group LM Vertical Roller Mill

On-Site Report

Advantages of the Vertical Mill

1. Leading Technology, Low Investment Cost

It integrates crushing, grinding, drying, classification, and conveying, with a compact layout and the possibility of outdoor installation, significantly reducing investment costs.

2. High Grinding Efficiency, Good Product Quality

The special design of the grinding roller and grinding disc ensures high grinding efficiency; the finished product has a uniform particle size distribution, good powder quality, good fluidity, and high activity.

3. Reliable Quality, Stable Operation

The grinding rollers are equipped with limit devices to prevent direct contact between the grinding rollers and the grinding disc, resulting in low vibration; it has an automatic slag discharge function to ensure safe operation of the equipment.

4. High Degree of Automation

It adopts an automatic control system, enabling remote control, interlocking protection, reliable operation, and simple operation.

5. Convenient Maintenance, Low Operating Costs

The grinding rollers use forced thin oil lubrication and are equipped with a hydraulic roller turning device. During maintenance, the grinding rollers can be turned out of the machine by the hydraulic device without disassembly, which is convenient and fast.

6. Large Drying Capacity, Wide Adaptability

It can use hot air to convey materials, drying materials with a moisture content of up to 15% before grinding, and the moisture content after grinding is <1%. Process Flow Description

Raw coal is transported to a buffer silo via a belt conveyor, and then fed into an LM vertical roller mill by a quantitative coal feeder for grinding. The ground material is blown up by a high-speed airflow at the air ring and enters a classifier for separation. Fine powder meeting the fineness requirements is carried out of the mill by the airflow and enters a dust collector for separation and collection. The finished powder is transported to a briquetting machine, then carbonized after briquetting, and finally crushed into charcoal blocks for ton-bag transportation.

Examples of Coal Powder Preparation Projects