In the modern industry, ultra-fine powder has been unwittingly into them, such as paper, paper sizing generally add 10% -20% of the ultra-fine powder, in high-grade copper paper, kaolin (or calcium carbonate) The addition of fine powder is as high as 40%. Another example is the plastic products, modified ultrafine powder addition, according to the different requirements of the product can be as high as 30% -50%. In some PVC products to add up to 70%. Ultrafine powder in plastic, rubber, electronics, cables, paints, paints, abrasives, pharmaceuticals, cosmetics, ceramics, building materials, food processing and household appliances in terms of the amount of large, such as the US flour production provides a certain amount of talc The More than 6,000 mesh superfine powder added to the plastic products (such as TV shell), not only can improve the appearance of the product size, finish, color, feel and other physical indicators, but also improve the product strength, flexibility, flexibility and anti-aging ability The So the fineness of ultra-fine powder requirements is the most important, superfine powder processing equipment – Ultra fine grinding mill processing technology is a high standard requirements. So what kind of milling machine to meet the requirements of ultra-fine powder? ZENITH machine by a number of engineers carefully studied, learn from advanced technology at home and abroad, in the Raymond Mill on the basis of successful research and development of three-ring ultra fine grinding mill, mainly for a variety of Mohs hardness of less than 6 non-flammable Explosion of brittle materials, ultra fine grinding mill and other milling machine compared to its characteristics:
First, ultra fine grinding mill special grading machine device
(1) the use of large processing capacity, to meet the 1250 single-round classifier.
① increase the number of leaves of the impeller, in order to increase the centrifugal force field, reduce the thickness of the blade, reduce the powder resistance.
② reasonable design of the packet machine shell.
③ design a reasonable gas seal structure, to prevent coarse particles from the impeller end into the impeller internal pollution of finished products.
(2) Under the premise of ensuring the amount of fuel, the rated air volume of the blower is greatly reduced and the wind pressure is increased in order to overcome the increase in the resistance caused by the high-speed impeller classifier.
(3) to design a reasonable classification and milling machine grinding area relative height difference position.
(4) in the classifier motor circuit connected to the ammeter and current relay, adjust the gas concentration in the powder.
(5) in the grading machine and the mainframe between the use of vibration isolation soft connection, to prevent damage to the classifier.
Second, ultra fine Grinding mill selection system
(1) the choice of high pressure, small flow of the blower.
(2) modify the host back to the box design, reduce the bellows scrolls cross-section machine products to meet the small flow, high wind pressure requirements. While increasing the thickness of the return box steel plate to increase rigidity and strength.
(3) the layout of the air supply pipeline must be short, and to smooth transition.