Semi-finished grinding process of cement wind selection pre-grinding and device thereof

Abstract

The invention belongs to the technical field of cement grinding, in particular to a semi-finished grinding process of cement wind selection pre-grinding and a device thereof. The device comprises a wind selection pre-grinding machine, a dynamic powder selecting machine, a dust remover and a ball milling machine, wherein an upper outlet of the wind selection pre-grinding machine is connected with the dynamic powder selecting machine, and a lower outlet is connected with the ball milling machine; an upper outlet of the dynamic powder selecting machine is connected with a finished product collector through the dust remover, and a lower outlet is connected with the ball milling machine; a lower outlet of the ball milling machine is connected with the finished product collector, and an upper outlet is connected with the finished product collector through the dust remover. The invention can realize powder selection before grinding and collect qualified materials in advance without feed grinding for secondary grinding so as to improve the efficiency of the grinding machine and improve the utilization rate of clinker.

Description

technical field [0001] The invention belongs to the technical field of cement grinding, and relates to a cement grinding process, in particular to a cement winnowing pre-grinding for semi-final grinding process and a device thereof. Background technique [0002] To greatly increase the output per hour of the mill, only pre-grinding is required for the materials to be milled. At present, the mainstream pre-grinding equipment on the market is the roller press. The technology of the roller press is relatively mature, the power saving effect is obvious, and the price of the equipment is relatively high. The fineness of the material discharged from the roller press is 0.08mm, and the sieve residue is 40% to 50%, and the specific surface area is 180m 2 / kg~200m 2 / kg, containing a considerable proportion of qualified materials, however, the particle shape of the material discharged from the roller press is not good, which affects the operability of the concrete, so all the mater...

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Problems solved by technology

The fineness of the material discharged from the roller press is 0.08mm, and the sieve residue is 40% to 50%, and the specific surface area is 180m 2 / kg~200m 2 / kg, containing a considerable proportion of qualified materials, however, the particle shape of the material discharged from the roller press is not good, which affects the operability of the concrete, so all the materials discharged from the roller press must be milled, and the materials that have reached the requirements of the finished product Re-grinding after entering the mill not only affects the output of the mill, but also easily causes over-grinding, which affects the strength of the clinker

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