According to coal coking can be divided into anthracite (fixed carbon content up to 93-98%, volatile < 10%), lean coal (called semi-anthracite, volatile between 10%-20%), bituminous coal (volatile > 14%), lignite (high volatile, high moisture), etc.; According to the variety, it can be divided into two categories: coarse coal powder and fine coal powder. After being processed by the mill, it can be applied to the chemical industry, smelting, gas making, glass, ceramics, ceramic tiles, metallurgical casting industry, etc. About the coal powder processing technology, mill manufacturers will explain in detail for you:
The first stage: crushing and shaping
The coal is broken by jaw crusher or cone crusher, and the final discharge is the bulk material suitable for entering the mill, the size is within 50mm.
The second stage: grinding powder
The crushed coal small block material only needs to meet the requirements of vertical pulverized coal mill, can be sent to the silo by the elevator, and then the vibration feeder will be evenly and quantitatively sent to the coal grinding chamber for grinding. The ground material enters a stage process.
The third stage: grading, powder collection
The pulverized coal material is graded by the pulverizer, and the unqualified powder is graded by the pulverizer and returned to the main engine for grinding again (refers to the vertical pulverized coal pulverizer). The powder conforming to fineness enters the dust collector with the air flow through the pipeline for separation and collection, and the collected finished powder is sent to the finished product bin by the conveying device through the discharge port.
The fourth stage: packaging and finished products
Pulverized coal has reached the finished product, and then unified with rotary packaging machine or automatic loading machine, packaging and transportation in various industries.
The above is the use of pulverized coal vertical milling machine processing coal pulverization technology, pulverized coal quality and equipment performance, raw material properties, raw material composition and so on have a close relationship. The main factors affecting the combustion of pulverized coal are: volatile matter, calorific value, fixed carbon, moisture, sulfur, ash, fineness.