Method for adjusting clearance between HPS medium-speed mill grinding roller and grinding table liner

Abstract

The invention provides a method for adjusting a clearance between a grinding roller of an HPS medium-speed mill and a grinding table liner. According to the adjustment method, the aim of quickly adjusting the clearance between the grinding roller and the grinding table liner is achieved through adjusting an approximation algorithm of a rotation distance of a nut of a limited screw rod on the outerpart of the grinding roller and a falling distance of the grinding roller, and particularly, when a production task is intense and the machine cannot be shut down, the clearance between the grindingroller and the grinding table liner can be quickly adjusted effectively, so that the problem that the capacity is reduced since the clearance between the grinding roller and the grinding table liner is largened after being worn is solved.

Description

technical field [0001] The invention belongs to the technical field of coal mill maintenance technology, and in particular relates to a method for adjusting the gap between a HPS medium-speed grinding roller and a grinding disc liner. Background technique [0002] After the direct injection system of No. 6 blast furnace was put into operation at the end of 2006, it was found that the medium-speed mill pulverizing system became larger due to the wear of the gap D between the grinding roller and the lining plate of the grinding disc, resulting in reduced production capacity and increased waste. According to field observation, the wear rate is about 2mm / month. The gap between the grinding roller and the grinding disc needs to be adjusted every 2 months. The specific method is: when the mill is stopped, the hot air inlet is blocked, and the staff enters the back of the mill and measures the gap D while adjusting the nut (the pitch is P1). Adjust the gap D to about 12mm after m...

AI Technical Summary

Problems solved by technology

[0002] After the direct injection system of No. 6 blast furnace was put into operation at the end of 2006, it was found that the medium-speed mill pulverizing system became larger due to the wear and tear of the gap D between the grinding roller and the lining plate of the grinding disc, resulting in a decrease in production capacity and an increase in waste

The whole adjustment time is 7 hours, the working space is narrow and complex, the ambient temperature is high, and it is prone to mechanical strain, gas poisoning and other injuries

During the production process, the gap between the grinding roller and the grinding disc becomes larger, the adjustment frequency is high, and the adjustment time is long, which affects the mill capacity

The maintenance working environment is poor and there are many unsafe factors

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