Design and production practice of"more crushing and less grinding"process based on micro powder dry screening technology
Micro powder screen is a new type of vibrating screen using a linear excitation method with characteristics of strong excitation force,large processing capacity per unit area,high screening efficiency,and low energy consumption.Micro powder screen used as checking screening equipment for high-pressure roller mill products can improve the processing capacity and screening efficiency compared to conventional screening equipment in dry screening for fine-grained materials.In order to improve the production capacity of the crushing system and reduce unit energy consumption,a high-pressure roller mill+dry screening closed circuit process is added after the original crushing and before grinding in a molybdenum ore beneficiation plant,forming a three-stage and two closed circuit crushing process.The newly added screening equipment adopts two SSMS43100 single-layer micro powder screens.Production practice has shown that the screening efficiency of micro powder screen can be maintained at over 90％under different operating conditions for three years,and the unit ore electricity consumption of crushing and grinding systems is reduced by 34.26％compared to the original process.
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