External-circulation iron-removing grinding technology

Abstract

An external-circulation iron-removing grinding technology belongs to grinding technology; the external-circulation iron-removing grinding technology integrates grinding, iron removal, and grading equipment as one body; materials after rolling are blown by high-speed air flow, and then are separated at a vortex grading part; fine powder is brought by the air flow to four cyclone separators distributed uniformly at the periphery for collection; middle-crude powder slides to the outside of the mill along a pipeline, and enters a pipeline iron-removing device below through an air-locking valve; iron impurities separated by the iron-removing device are discharged through a slag discharge port; other materials enters a circulating elevator, and are fed into the mill for grinding. With the material bed-rolling grinding technology and the external-circulation iron-removing technology, powder grading is realized inside the equipment, and iron impurities in the powder are removed in time, and thus steel loss is reduced. A traditional mode in which the millstone rotates and the grinding roller is driven for the vertical mill is changed into a mode in which the millstone is fixed and the grinding roller rolls; powder grading is realized inside the equipment; and thus the working efficiency is high; the fine grinding performance is good; the abrasion is less; the energy consumption is low; the investment is saved; and the maintenance is safe and simple.

Description

technical field [0001] The invention relates to a grinding process, in particular to an external circulation iron removal grinding process. Background technique [0002] Since my country's reform and opening up, the national economy has grown rapidly, "scientific and technological innovation, independent innovation" has become the mainstream of today's industrial development, and my country's industry is gradually developing in the direction of intensive, energy-saving, emission-reducing, and low-carbon. my country is a big cement producing country and also a big cement consuming country. It is of great significance for our country to save energy and reduce emissions by vigorously reducing the excessive energy consumption in the process of cement grinding. According to relevant statistics, my country's cement plants need to grind more than 30 kinds of materials to produce 1 ton of cement, and the power consumption of grinding accounts for about 65% to 70% of the total power ...

AI Technical Summary

Problems solved by technology

However, the particle shape of the material discharged from the roller press is not good, which affects the operability of the concrete. Therefore, all the materials discharged from the roller press must be put into the mill for grinding. The re-grinding of the material that has reached the final product requirements not only affects the output of the mill. , it is also easy to cause over-grinding, which affects the strength of clinker

For more than 100 years, people have done a lot of research on the production process and mechanical dynamics of mills. Although some progress and achievements have been made, there are still technical problems that have not been overcome in practical applications.

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