Application of the Ultrafine Grinding Mill in Producing GCC Fine Powder
The ultrafine grinding mill adopts multiple layers of rings and rollers to impact, roll and grind for producing ultrafine powder. Generally speaking, there are 3 or 4 layers of rollers and rings in the grinding chamber. This can fully meets the technical requirements of ultrafine grinding mill. The material will follow down through the multiple layers of rollers and rings from up to bottom. Generally speaking, there are 3 or 4 layers for grinding, which can guarantee the material can be completely ground and the particle is also very ultrafine.
The Advantages of Ultrafine Grinding Mill in GCC Powder Production
Ultrafine grinding mill is an ideal equipment for dry production of heavy calcium superfine powder. As an important inorganic filler, calcium carbonate powder is one of the three major fillers in the production of chemical products and has a wide range of applications. With the rapid development of China’s economy, the requirements for the grade and fineness of calcium carbonate are getting higher and higher. In recent years, the domestic processing of heavy calcium is mainly using Raymond mill. The fineness of the processed products is relatively coarse, generally 200 ~ 400 mesh. Although the Raymond mill has been technically modified in recent years, the product fineness has been improved to 600 – 800mesh. However, it still cannot meet user requirements, the added value of the product is low, and resources cannot be used more reasonably.
When the size of the feeding material is not more than 20mm, the moisture content is not more than 8%, and materials with Mohs hardness of less than 6 can be made into a fine powder with d97 <10μm using ultrafine grinding mill.
- Low Investment and High Profit
Compared with large-scale equipment, the investment has been saved by nearly half. At present, many companies use ball with classifying system to produce ultrafine powder, and the powder fineness can reach d97 <10μm. Ultrafine grinding mill is used to produce products with the same fineness with the same annual output, which can save about 60% investment.
- Higher Precision Classifying:
The classifier use internal classifying structure and unique classifying turbine wheel can guarantee classifying effect with higher sieving rate.
- Lower Power Consumption:
Comparing with other grinding mills, ultrafine grinding mill can consume less powder.
- Stable Performance:
The driving device of the ultrafine grinding mill uses reducer. It has low energy consumption and high efficiency> 96%. We have tested the belt drive and reducer drive separately. After more than half a year of tests, we have reached the following conclusions: the belt drive has a simple structure, low cost, and a transmission efficiency of 90% to 95%. The movement of the belt is in an unstable state, which directly affects the normal work. There are many coarse particles in the powder after crushing, which results in an increased classification load and the classification motor is easy to burn. The gear transmission can improve the power utilization rate. Although the manufacturing cost is slightly increased, the equipment operates reliably and the product quality is stable.
5. Higher specific surface area:
The specific surface area of powder is the surface area occupied by unit mass, in m2 / g. It is an important indicator of the ability to participate in chemical reactions. The larger the contact surface, the better the synthesis process and the easier the control. The higher the utilization rate of calcium carbonate, the lower the consumption rate of the powder, thus showing its high activity. Therefore, the specific surface area has become an important indicator of the activity of ultrafine calcium carbonate powder. H L M ring roller mill can produce ultra-fine powder with specific surface area of 2.24 (d97 = 10μm) to 3.04m2 / g (d97 = 4μm), which is much higher than other domestic equipment.