In the main frame, a 100-1500 kg powered pressure spring is fixed to the roller suspender. After the grinder is put into effect, the roller rotates around the main shaft, and rolls closely against the ring affected by the high pressure spring and centrifugal force. And its rolling pressure is 1.2 times higher than that of the Raymond grinder under the same power condition and the output is raised to a new degree.When the stuff is loaded into the grinding cavity, it is shoveled into the space between the roller and the ring for grinding.The resulted powder is routed to the separator along the circulation wind of the blower and the standard fine powder is guided to the cyclone collector as final product and large size stuff falls back to the grinder for regrinding. The circulation wind returns to the blower to repeat the above process and the remainder wind enters into bag deduster for purification.
When a certain degree of wear of roller and ring is caused, it is recommended to adjust the length of the spring to maintain the constant pressure between the roller and the ring. As a result, the stable output and fineness are ensured.
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