High-moisture vertical mill drying in-series grinding process

Abstract

The invention discloses a high-moisture raw material vertical mill drying in-series grinding process. The process solves the long-term problems of a traditional vertical mill treatment of high-moisture raw material, and greatly expands the application scope of a vertical mill. At the same time, the vertical mil-ball mill in-series grinding process and a rolling compaction material bed grinding process are adopted, the particle size of the majority of sorted fine powder is controlled in the range of 60-200 [mu]m, ball mill material cushion and overgrinding phenomena are reduced, and powder classification is achieved in the devices. The process is high in grinding efficiency, good in fine crushing performance, small in abrasion, low in energy consumption and safe and simple in maintenance.

Description

technical field [0001] The invention belongs to the field of preparing cement raw meal from high-moisture raw materials, and in particular relates to a high-moisture raw material vertical mill drying series grinding process. Background technique [0002] The preparation of cement raw meal by vertical mill is an energy-saving drying grinding process commonly used in the cement industry. However, subject to the design characteristics of traditional vertical mills, the comprehensive moisture of raw materials processed by traditional raw meal vertical mills is generally below 15%. The traditional process has the following disadvantages: 1. The drying and grinding process of the traditional raw material vertical mill cannot dry the raw material with a moisture content of more than 25%; the sticky raw material cannot form a stable material bed on the traditional vertical mill disc, The system is not functioning properly. The drying and grinding process of the traditional raw mat...

AI Technical Summary

Problems solved by technology

However, subject to the design characteristics of traditional vertical mills, the comprehensive moisture of raw materials processed by traditional raw meal vertical mills is generally below 15%.

The traditional process has the following disadvantages: 1. The drying and grinding process of the traditional raw material vertical mill cannot dry the raw material with a moisture content of more than 25%; the sticky raw material cannot form a stable material bed on the traditional vertical mill disc, The system is not functioning properly

This kind of process is complex, high energy consumption, large area, high investment and operating costs

3. For materials such as chalk dry powder with very fine particle size, which cannot form a stable material bed with traditional vertical mills, tube mills or other grinding and crushing equipment with more complicated processes and higher energy consumption are generally used for grinding