Roll type vertical mill

Abstract

The invention discloses a roll type vertical mill which comprises mill shell. A grinding disc and grinding rolls are arranged in the mill shell. A nozzle ring is arranged between the outer circumference of the grinding disc and the mill shell. An air inlet is further arranged at the position, on the lower portion of the nozzle ring, of the mill shell. Air enters the air inlet to enter the mill shell to form annular airflow. A material blocking ring is arranged on the edge of the grinding disc and is circumferentially and evenly provided with material stirring plates. Louver air guide blades are annularly and evenly distributed in the nozzle ring. Annularly-distributed impact plates are arranged on the upper portions of the louver air guide blades. A discharging opening used for dischargingis further connected to the bottom of the shell. Annularly-distributed vortex plates are arranged on the inner wall of the middle upper portion of the mill shell, tangential air inlets are arranged at the positions of the mill shell, and air is supplied to the tangential air inlets through an air supplementary annular air flue. According to the roll type vertical mill, the air volume of lifting materials on the nozzle ring can be balanced and adjusted, the material grading efficiency of the nozzle ring can be improved, the air volume of the airflow of the lifting materials can be reduced, thepressure difference can be reduced, energy can be saved, and meanwhile the powder selection efficiency can be improved.

Description

technical field [0001] The invention relates to a material bed grinding equipment, in particular to a roller vertical mill. Background technique [0002] Roller vertical mill is a kind of material bed grinding equipment, which is widely used in building materials, electric power and metallurgy industries. It is used to grind medium and brittle materials to form fine powder materials. [0003] The mechanical term name (scientific name) of roller vertical mill is: roller mill. Compared with the ball mill that is placed horizontally, because this kind of mill works in a standing mode, it is customary in the cement industry to call it: vertical mill, also known as : Mill. It was used in industrial production in the UK in 1790, and it was not until 1928 that German talents officially applied the vertical mill to the coal powder preparation of the cement industry; my country introduced the German vertical mill in 1978, and the vertical mill technology began in 1984 and equipment ...

AI Technical Summary

Problems solved by technology

Increasing the amount of discharged material does not consume too much energy, but if the material is lifted by air flow, it will consume a lot of energy

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