There are three major categories of common grinding machinery on the market, namely plastic grinding machinery, grain grinding machinery and mining grinding machinery. They can all be called grinders, but their uses and prices vary greatly. This article will introduce the 3 types of machinery in detail. Some grain mills designed and produced by machinery (that is, grain grinding machines that can also be used for medicinal purposes) are generally made of high-quality stainless steel. This type of grinding mill relies on two grinding discs full of tooth grooves to grind against each other to grind materials into powder. This machine can grind various grains, Chinese medicinal materials, condiment raw materials and other materials into uniform powders of 50-200 mesh.
The processing range of this type of mill includes:
1. Various grains, including sesame, walnuts, black rice, rice, soybeans (soybeans), mung beans, black beans, Peanuts, lotus seeds, corn, sorghum, barley, oats, buckwheat, water chestnuts, etc.;
2. Various Chinese medicinal materials, including almonds, barley, gorgon fruit, yam, red dates, hawthorn, wolfberry, poria, and Shouwu , donkey hide gelatin, frankincense, dodder, angelica, dangshen, astragalus, ganoderma, gastrodia elata, etc.;
3. Various seasoning raw materials, including pepper, clove, star anise, ginger, chili, pepper, amomum villosum, cinnamon, Tangerine peel, kaempferol, cardamom, fennel, garlic, angelica, etc.
Whole grains are rich in protein, vitamins, trace elements, crude fiber, etc., and have special health effects such as improving human immunity, enhancing human vitality, delaying aging, losing weight and hair care, detoxifying and moisturizing, and beautifying the skin. , Therefore, whole grains are in line with modern people’s pursuit of healthy diet.
2. Performance characteristics
1. Made of high-quality stainless steel, luxurious and high-end, beautiful and elegant.
2. Advanced design, precise structure, easy to move.
3. Equipped with a famous brand motor with strong power to ensure grinding effect.
4. Low noise and less dust; fast feeding and fine grinding.
5. Simple operation, convenient cleaning, safe and hygienic.
6. No screen, the feeding speed and discharging thickness can be adjusted.
The price ranges from 3000-5000. 1. Characteristics of plastic grinding machinery
1. It can grind various soft and hard materials into powders of 20 mesh to 80 mesh at room temperature.
2. It has a wide range of applications, including PVC, PE, modified PP, ABS, PS, PA, PC and other plastic and non-plastic materials (such as paper, wood chips, leather, etc.) with different molecular structures. system.
3. With micro powder dust removal device.
4. The machine consists of four parts: main machine, automatic discharging system, automatic powder screening system, and micro powder dust removal device. It has a high degree of automation and accounts for The land area is small.
3 Mining grinding machinery
This machine adopts the advanced structure of similar products at home and abroad, and is updated and improved on the basis of Raymond mills in the same industry. This equipment is better than The ball mill has high efficiency, low power consumption, small footprint and small one-time investment. The grinding roller grinds tightly against the grinding ring under the action of centrifugal force. Therefore, when the grinding roller and grinding ring wear to a certain thickness, the output and fineness of the finished product will not be affected. The grinding roller and grinding ring have a long replacement cycle, thus eliminating the short replacement cycle of centrifugal mill wearing parts. The air separation airflow of this machine circulates in the fan - grinding shell - cyclone separator - fan, so it has less dust than the high-speed centrifugal grinder, the operation workshop is clean, and the environment is pollution-free.
Raymond mill uses and scope of use:
Raymond mill is widely used for barite, calcite, potassium feldspar, talc, marble, limestone, dolomite , fluorite, lime, activated clay, activated carbon, bentonite, kaolin, cement, phosphate rock, gypsum, glass, insulation materials and other non-flammable and explosive minerals and chemicals with Mohs hardness not greater than 9.3 and humidity below 6 For the processing of high-fine powdering of more than 280 kinds of materials in industries such as construction and construction, the R-type Raymond mill can adjust the finished product particle size arbitrarily within the range of 80-325 mesh, and some materials can reach up to 600 mesh.
Main structure of Raymond mill:
The structure of this machine is mainly composed of host machine, analyzer, fan, finished product cyclone separator, micro powder cyclone separator and air duct.
Among them, the main machine consists of a frame, an air inlet volute, a blade, a grinding roller, a grinding ring, and a cover.
The working principle of the Raymond mill:
When working, the materials to be crushed are added into the machine from the feed hopper on the side of the machine casing and hung on the plum blossom frame of the main machine. The grinding roller device revolves around the vertical axis and rotates on its own at the same time. Due to the centrifugal force during rotation, the grinding roller swings outward and presses against the grinding ring, causing the scraper to scoop up the material and send it between the grinding roller and the grinding ring. The purpose of crushing materials is achieved due to the rolling and rolling of the grinding roller.
Raymond mill winnowing process:
After the material is ground, the fan blows the wind into the main casing, blows up the powder, and analyzes it through the analyzer placed above the grinding chamber. Materials that are too fine and too coarse fall into the grinding chamber for re-grinding. Materials whose fineness meets specifications enter the cyclone collector with the wind flow. After collection, they are discharged through the powder outlet, which is the finished product. The air flow returns to the fan from the return air duct at the upper end of the large cyclone collector. The air path is circular and flows under negative pressure. The increased air volume in the circulating air path is discharged through the exhaust pipe between the fan and the host machine and enters the small cyclone collection device for purification.
The working principle of the high-pressure grinding mill:
In the main machine of the high-pressure grinding mill, a high-pressure spring with a pressure of 1000-1500 kg is fastened to the grinding roller hanger. After starting work, the grinding roller rotates around the main axis and rolls close to the grinding ring under the action of high-pressure spring and centrifugal force. Its rolling pressure is 1.2 times higher than that of Raymond powder machine under the same power conditions, so the output is greatly increased. When the material to be ground enters the grinding chamber, it is scooped up by the blade and sent between the grinding roller and the grinding ring for rolling. The crushed powder is brought into the analyzer with the circulating air of the blower, and the qualified fine powder flows into the cyclone collector with the air. The powder is the finished product, and the large particles fall back to the grinder for re-grinding. The circulating air returns to the blower to repeat the above process, and the residual air enters the bag dust collector for purification. When the grinding roller and the grinding ring reach a certain level of wear, adjust the length of the high-pressure spring to maintain a constant grinding force between the grinding roller and the grinding ring. This ensures stable output and fineness.
Performance characteristics of high-pressure mill:
1. Compared with other mills, the output of high-pressure mill is increased by 10-20% under the same power conditions, and the grinding roller grinds the materials better. The pressure is increased by 800-1200kg under the action of high-pressure spring.
2. Mineral materials with Mohs hardness less than 9.3 can be processed and crushed.
3. The finished product has a wide range of particle sizes. The coarsest particle size can reach 0.613 mm (30 mesh), the particle size can generally reach 0.033 mm (425 mesh), and a small number of materials can have the smallest particle size up to 0.013 mm (1000 mesh). item).