SU1538923A2 - Material grinding loose material - Google Patents

Abstract

The invention relates to a grinding apparatus and makes it possible to increase the grinding efficiency. Pieces of comminuted material are fed through pipe 6 and move downward in the space bounded by ribs 12, fall between fixed blades 8 and rotating blades 11 of rotor 10, and then enter the grinding zone between blades 14 and outer ends of knives 11, where additional grinding of material occurs. The crushed particles under the action of centrifugal forces are thrown onto the wall of the housing 1, where they are picked up by the gas flow forced through the pipe 4. The gas flow with suspended particles gets through the slots 13 and the gap between the housing 1 and the shell 7 of a larger volume, ter em speed. Large pieces fall out of the flow, which along the fins 12 again fall into the cutting zone. The crushed particles remaining in the gas stream are removed from the device through the nozzle 5 and are directed to the screening. 4 il.

Description

The invention relates to a device for grinding materials, can be used in the building, mining and other industries and is additional to the author. St. No. 1391707.

The purpose of the invention is to increase productivity.

Fig. 1 shows a grinding device, a general view; figure 2 is a section aa in figure 1; on fig.Z - shell with horizontal and vertical knives; figure 4 - section bb On fig.Z.

The device contains a cylindrical housing with the top 2 and bottom 3 covers. A gas outlet 4 is installed on the lower lid 3, the upper lid 2 is equipped with a particle outlet pipe 5 and a material inlet pipe 6. A shell 7 is installed in the housing 1, on the lower end of which knives 8 are fixed. The high-speed shaft 9 is installed along the axis of the housing 1 with a rotor 10 with knives 11 mounted on it, the inner surface of the shell 7 has fins 12, and a slot 13 is located on the side surface of the shell 7 . The knives 14 are vertically arranged on the outer surface of the shell 7 to interact with the outer ends of the rotor blades 10.

The grinding device operates as follows.

Pieces of comminuted material are fed through nozzle 6 and move downward in a space bounded by

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the ribs 12 fall between the fixed blades 8 and the rotating blades 11 of the rotor 10, and then enter the grinding zone between the blades 14 and the outer ends of the blades 11, which provide additional grinding of the material. The crushed particles under the action of centrifugal forces are thrown onto the wall of the housing 1, where they are picked up by the gas flow injected through the pipe 4. The gas flow with suspended particles gets through the slots 13 from the gap between the housing 1 and the shell 7 of a large volume, ter em speed. Large pieces fall out of the stream, which along the fins 12 again fall into the cutting zone. The crushed particles remaining in the gas stream are removed from the device and directed through a pipe 5 to the screen.

The installation of additional vertically located on the side of the knives, interacting with the outer ends of the rotor knives, makes it possible to create another grinding zone and increase productivity.

Claims (1)

Invention Formula A device for grinding materials according to ed. St. No. 1391707, characterized in that, in order to increase productivity, knives, which cooperate with rotor knives, are mounted on the outer surface of the shell. I m CM cr oo P in ten -I n I -four ua 15 FIG. H