Heavy Calcium Ultrafine Processing Equipment

There are many types of heavy calcium ultrafine processing equipment. They work with ultrafine classifiers to form ultrafine processing systems. These systems can generally achieve ultrafine production results. Currently, the mainstream demand in the calcium market is 600-1500 mesh heavy calcium products. The added value of heavy calcium products is low (compared to talc, barytes, kaolin, etc.). Scale is one of the main factors affecting efficiency. Today, we will discuss the ultrafine processing equipment used in the dry process of heavy calcium.

Heavy Calcium Ultrafine Processing Equipment

Comparison of Various Ultrafine Processing Equipment

Device Type	Product fineness (mesh)	Optimal fineness (mesh)	Avantages	Inconvénients
Raymond mill	100-1250	<400	Great advantages in producing products below 400 mesh	Low content of micro powder Low production capacity of products above 800 mesh
broyeur vibrant	1250-2500	>1250	High grinding efficiency High content of fine powder	Large aspect ratio Serious over-grinding
Dry stirring mill	1252-6000	>2500	High grinding efficiency
Roller mill	400-1500	<1500	Electricity saving Low investment	Low output per machine Poor product stability
Vertical mill	200-1500	<400	High crushing efficiency
Ball mill classifier	600-6500	800-2500	Large production scale of single machine

As seen above, although equipment like Raymond mills are commonly used by heavy calcium enterprises, most of these devices struggle to achieve large-scale production of ultrafine heavy calcium.

Currently, in Europe, the United States, and other countries and regions where they provide technology and equipment, the processing technology and equipment are mainly broyeurs à boulets paired with large classifiers.

Practice has shown that for large-scale dry production of ultrafine heavy calcium products above 600 mesh, the technologies and equipment suitable for the development of this industry mainly fall into two categories: high-fineness ball mills paired with ultrafine classifiers, and ultrafine vertical mills paired with ultrafine classifiers. A comparison of the processing systems of vertical mills and ball mills is shown in the table below.

Paramètre	Ball mill+ classifier	Vertical mill+ classifier
Single machine production scale	Bigger	Big
<400 mesh	Not suitable	Very suitable
400-600 mesh	Relatively suitable	Very suitable
400-600 mesh	High power consumption, but the product surface area is also high	Low power consumption
600-1000 mesh	Very suitable	Very suitable
600-1000 mesh	The power consumption is high, but the product has a high specific surface area	Low power consumption
>1000 mesh	Very suitable	Secondary classification required
>1000 mesh	Stable product quality Higher specific surface area	Powders after secondary classification Product quality fluctuates
Power consumption <1250mesh	Haut	Low
Power consumption >1250mesh	Same as <1250 mesh products	Slightly higher
Product Application	More suitable for paper and coatings industries	More suitable for plastics industries

Conclusion

The demand for ultrafine heavy calcium powder below 2μm is rapidly increasing, and the research on large sub-micron classifiers is currently a key task. The combined use of multiple large classifiers is an effective method for diversifying products simultaneously. The use of ball mills and large classifiers has made large-scale single-machine production of heavy calcium possible. The ball mill has the largest single-machine capacity, and its performance is more prominent when producing products above 1250 mesh. On the other hand, the ultrafine vertical mill shows significant energy-saving effects when producing heavy calcium products in the 400-1000 mesh range.

Poudre épique

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