SU1727886A1 - Centrifugal mill - Google Patents

Abstract

The invention relates to the crushing and grinding technology and can be used for fine crushing of clay raw materials in the preparation of press powder in the production of coarse and fine ceramics using the method of semi-dry pressing, as well as other low-abrasive materials of small and medium strength. The aim of the invention is to increase productivity in the preparation of a clay press powder for semi-dry pressing of building bricks and to ensure uniformity of particle size distribution while reducing the dust fractions. The centrifugal mill comprises a housing, an actuator, two discs rotating towards each other, each of which contains cutting and reflective knives. The cutting knife is installed in the axial slot at an acute angle relative to the inner surface of the disk in the direction of its rotation, and the reflective knife is located behind the cutting knife on the internal surface of the disk and has an acute mounting angle against the direction of its rotation. For faster removal of the ground material, axial slits are provided in front of the cutting blades. 2 Il. sl C

Description

The invention relates to a grinding technique and is intended for grinding clay raw materials in the preparation of press powder in the production of coarse and fine ceramics using the method of semi-dry pressing, as well as other low-abrasive materials of low and medium strength.

The purpose of the invention is to increase productivity in preparing clay clay press powder for semi-dry pressing of construction bricks and to ensure uniform particle size distribution while reducing dust fractions.

Figure 1 shows the proposed centrifugal mill, a general view; figure 2 - the disk, section aa.

The centrifugal mill consists of a body 1 in which a rotating cone disk 2 is located, resting on

rollers 3 having tension bolts 4. In the cavity of the disk 2 there is a stationary bowl 5. On the vertical shaft 6 with rolling bearings 7 there is a movable plate 8. rotating in the opposite direction to the disk 2. On the upper end of the vertical shaft 6 a screw 9 is attached, and at its lower end is a drive pulley 10. A conical annular space B. is formed between the disk and the plate, and in each disk there are through gaps B.

Centrifugal mill works as follows.

The clay raw materials previously crushed and cleared of indestructible objects after the stone-separating rollers enter the fixed cup 5 of the crusher mill and are fed into the grinding zone formed by the upper conical disk 2 and

4 Ю С 00 О

bottom plate 8. The design of the installation of the plate 8 and the conical disk 2, as well as the presence in the neck of the upper disk of the fixed loading cup 5 and the screw 9, eliminate the possibility of the reverse selection of clay pieces from the crushing cavity, which significantly increases the frequency of rotation of the disks. Hitting the knives of the discs, the raw materials are cut and broken to sizes smaller gaps B and C, through which the ground product is removed under the action of centrifugal forces in the cylindrical cavity of housing 1. Formula of the invention A centrifugal mill containing a vertical body and

0

five

There are a pair of disks coaxially mounted with each other with the possibility of rotation in opposite directions and having radial knives on their opposite surfaces, which is different. that, in order to increase productivity in preparing clay clay press powder for semi-dry pressing of construction bricks and to ensure uniform particle size while reducing dust fractions, each disk is made with radial through holes, and the blades are mounted to the working surface of the disks at an acute angle alternating with directions in opposite directions.

Material input

- - material exit

Claims (1)

SUMMARY OF THE INVENTION A centrifugal mill comprising a vertical casing and a pair of discs located therein, coaxially mounted to rotate in opposite directions and having radial knives on their opposite surfaces, characterized in that. that, in order to increase productivity in preparing clay press powder for the semi-dry pressing of building bricks and to ensure uniform particle size distribution while reducing dust fractions, each disk is made with radial through slots, and the knives are mounted to the working surface of the disks at an acute angle with alternating its directions in opposite sides. —Material inlet —__ Material inlet 4-4 GZZZZZZZZ! = -, = -S "- Direction of rotation FIG. 2