sbmzhcn Blog find crusher and grinding mill in China

June 26, 2010

Filed under: raymond mill — Tags: , , , , — sbmzhcn @ 9:05 am

Vertical roller mill has many different forms, but it works basically the same. All of these forms of machine comes with roller (or the equivalent of roller grinding parts), and roller along the track of the disc at the level of circular movement imposed by external grinding roller in the vertical pressure on the disc on the material being the joint action of compression and shear, and to crush.
Material grinding process: motor through reducer rotating drive disc, the material falls from the mill under the central entrance and exit, under the action of centrifugal force to the disc edge by the roller to move and the crushing, grinding out lap after the material was speed up the flow to and vertical mill with one of the separator, after the meal by the separator back to the mill, the re-grinding; powder while grinding out with air, dust collection equipment in the system to collect down, that is, products . Established through the mill in the pneumatic conveying of materials, a larger air flow rate, which can use waste heat of gas, at the same time dry grinding operations.

Vertical Roller Mill Principle:
Used in cement grinding production grinding parts of its various forms, there is a cylinder, cone type, ball type, etc., and roller surface is also flat, curved, convex round noodles. Applied to the grinding roller to roller grinding along the track bed in close contact with the material strength of a spring pressure, hydraulic, etc..

How Vertical Roller Mill Works:
It has two pairs of grinding rollers, each pair of roller composed of two narrow rollers, mounted on the same axis and can rotate at different speeds. There are two circular disc slot, and roller to the tire shape, work pressure in the tank. Disc roller and the relative sliding velocity between small and roller can swing, even if the roller sleeve and the disc after the liner wear can guarantee a good abrasive, will not affect the grinding effect. Roller symmetrical structure, one side can be upside down after use and wear.
Material grinding process: hydraulic pneumatic roller device through the pressure applied to the material on the crushing of materials, the materials have been moved to crush the edge of disc, from the disc around the nozzle from the exhaust air to improve these materials to Separator.Meal to separate returns after a concentrated mill, fine powder was collected in the precipitator unloading. In the gas flow is small, the meal can not be increased to enhance air flow, they would fall through the nozzle discharged outside the mill, bucket elevator to be transported to the feeder of vertical roller mill, and was re-grinding mill feed people. This cycle features of the way there:
① ring by adjusting the air valve, can change the product fineness can Shide mill bed load material uniformity and stability, improving the grinding efficiency;
② coarse particles in the external circulation, helps reduce Fan power consumption and overall system power

June 4, 2010

raymond mill

Filed under: raymond mill — Tags: , , , — sbmzhcn @ 11:44 am

raymond mill:

 Comparing with ball mill, raymond mill features high efficiency, low power consumption, small size, a one-time small investment and widely used in barite, calcite, potash feldspar, talcum, marble, limestone, dolomite, fluorite, lime, activated clay, activated carbon, bentonite, kaolin, cement, phosphate rock, gypsum, glass, insulation materials, etc whose mohs hardness is not greater than 9.3 and humidity is below 6%. Raymond Mill is mainly consist of the milling system, analysis system and dust removal system. Raymond mill Installation : Pre-installation preparation : 1. Before Raymond mill has not yet installed on site, should be properly kept. Exposed surfaces shall be coated with anti-rust oil, and avoid the sun and rain to prevent rusting water body, to establish a maintenance system. 2. Plant and infrastructure should have sufficient height and size of the installation location. The base of raymond mill should be poured with standard cement and steel. After pouring cement a good foundation, you must have the maintenance period of 15 days. 3. should be accompanied by 2 ~ 3 tons lifting tools for installation and maintenance with Raymond mill. 4. After using raymond mill more than 6 months, clean and inspect the central axis of the host system, transmission device, roller device, analysis of oil pools. After that add enough to cope with the various components of lubricants.

Raymond mill Operation Flow :

 Before starting,should check whether all the maintenance doors closed tight, check the crusher jaw plate gap is in line with the feed grain size, adjusting the analytical engine speed should reach approximate finished size requirements. The final start the machine as the order. 1. start bucket elevator; 2. activate the jaw crusher; 3. when there are material silo, start analysis machines;4 to start the air blower;5. start the raymond mill, at the same time start electromagnetic vibrating feeder. shut down the raymond mill machine in the following order: 1. first close the vibrating feeder to feed material;2. about one minute later stop the host;3. blowing the net residual powder then do the cessation of sub-blowers;4. the final close analyzer.

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