Hongxing Unique Grinder with three Rollers
A grinding mill is a unit operation designed to break a solid material into smaller pieces. There are many different types of grinding mills and many types of materials processed in them. Historically mills were powered by hand (mortar and pestle), working animal (horse mill), wind (windmill) or water (watermill). Today they are also powered by electricity. Hongxing Machinery is a professional roller grinding mill manufacturer, and supplies various kinds of roller mill and dryer machine, which all adopt national advanced technology and have high efficiency with low cost.
Designed for continuous operation, the grinding mill with three roller performs efficient fine grinding and classification of soft to medium-hard materials. Due to the integrated bearing system of roller table, three roller grinding mill does not need any reinforcement on gearbox itself and requires minimal maintenance.
The grinding operation of three roller grinding mill is performed on the principal of Attrition and compression, which results due to the centrifugal force generated from the suspended rollers running inside a stationary Bull Ring. The material to be grind enters the grinding chamber through an automatic feeder and falls on the mills floor. There it is scooped up by steel into the nip space between the rollers and Bull Ring where grinding takes place.
The high pressure centrifugal blower will inhale air from outside and blow the crushed materials to classifier. The rotating turbo in the powder concentrator will make the coarse materials return to the mill and reground, while the fineness will mix with the air and go into the cyclone and be discharged in the discharge bin, which is at the bottom of it. The air, which mixed with very little fineness, will be purified by impulse duster and discharged by blower and muffler.Dryer machine:http://www.hxjqchina.com/product-list_35.html
vibrating screen:http://www.hxjq-crusher.com/40.html
A typical type of fine grinder is the ball mill. A slightly inclined or horizontal rotating cylinder is partially filled with balls, usually stone or metal, which grinds material to the necessary fineness by friction and impact with the tumbling balls. Ball mills normally operate with an approximate ball charge of 30%. The feed is at one end of the cylinder and the discharge is at the other. Ball mills are commonly used in the manufacture of Portland cement and finer grinding stages of mineral processing. Industrial ball mills can be as large as 8.5 m (28 ft) in diameter with a 22 MW motor, drawing approximately 0.0011% of the total world’s power (see List of countries by electricity consumption).
The classifier separates grinded materials, and coarse particles return to grinding chamber for further size reduction. Fine materials are carried by air to the cyclone air separators where air and grinded material are separated and collected. The clean air is returned to the blower for close circuit operation.
A constant quantity of air is circulated through the mills and system. The air from blower enters the mills through a series of tangential ports round the bases of grinding chamber and sweeps the fine and medium fine material to the classifier above the grinding chamber leaving no grinded material in the chamber and allowing the rollers to work & efficiently crushing coarse material.
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