I. Introduction
Pearls are a kind of precious valuables, which are widely used in jewelry, cosmetics, medicine and other fields. In jewelry and cosmetics, pearls are often used to make bead necklaces, earrings, bracelets, etc., and in the field of medicine, pearls are used to make traditional Chinese medicine, health care products, etc. Among them, the processing of pearls is a very important part, and the crushing of pearls is also an important processing technology. This article will introduce the methods and equipment of pearl crushing, hoping to be helpful to the practitioners concerned.
Second, pearl crushing method
1. Rough grinding
Rough grinding is the first step of pearl grinding, mainly using jaw crusher, impact crusher and other equipment, its role is to break the pearl into large particles, for the subsequent fine grinding, ultra-fine grinding and other processing technology to pave the way.
2. Fine grinding
Fine grinding is the second step of pearl grinding, which is mainly carried out by ball mill, vibration mill and other equipment, and its role is to further break the pearl into smaller particles, increase its surface area, and facilitate subsequent processing operations. The fine grinding time is generally 6 to 8 hours.
3. Ultra-fine grinding
Ultrafine grinding is the last step of pearl grinding, mainly using equipment such as grinding machines, its role is to grind pearls into very small particles, increase their surface area and activity, easy to adsorption and utilization. The time of ultrafine grinding is generally 12 to 24 hours
Third, pearl crushing equipment
1. Flour mill
The mill is a kind of equipment that grinds the material into fine powder, mainly including ball mill, drum mill, vibration mill and many other types. Among them, the ball mill is a more commonly used pearl crushing equipment, which uses external force to rotate the ball disk and grind the material.
2. Mill
The mill is a kind of equipment for rolling, cutting and dispersing materials through the rotation and friction of the roller wheel and the roll, mainly including the surface mill, the three-roll mill, the roll mill and many other types. Among them, the surface mill is a more suitable for pearl grinding equipment, which uses two or more mutually fitted and rotating grinding wheels to grind the material.
3. Grinder
Grinding machine is a kind of equipment that grinds materials into ultrafine powder, mainly vibration grinding machine, spray dry grinding machine, ball grinding machine and other types. Among them, the vibration grinder is a kind of equipment suitable for pearl ultrafine grinding, which gradually grinds the pearl into ultrafine powder through vibration abrasive.
Iv. Summary
Pearl grinding is an important part of pearl processing, its early coarse grinding, fine grinding and late ultrafine grinding need to use different types of equipment for processing. In the actual processing process, we need to choose different types of equipment for processing according to the different characteristics and uses of materials to achieve the optimal processing effect.
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