SU1291210A2 - Installation for preparing samples of loose materials - Google Patents

Abstract

The invention relates to installations for the preparation of samples of bulk materials, which makes it possible to increase the grinding efficiency and the accuracy of sample separation in the construction, metallurgical and other sectors of the industry. For this purpose, in an installation comprising a housing 1 with a fixed disk 6 and a drive shaft 7, on which a stepped rotor 8 with beaters and a disk 9 is mounted, between the disks 6 and 9 and the annular tray 12 the annular diffuser 11 is fixedly mounted, with its entrance part facing the gap 10 between the disks. 1 il. S (L of about 1H

Description

The invention relates to devices for the preparation of samples of bulk materials and is an improvement of the device according to the authors. St. No. 1045929.

The purpose of the invention is to increase the grinding efficiency and the accuracy of sample division by reducing the vortex formation.

The drawing shows an installation for sampling bulk materials, a longitudinal section.

The installation includes a housing 1 with a discharge pipe 2, a lid 3 with a feed funnel 4, bars 5 and a fixed disk 6. In the case on the drive shaft 7 a stepped rotor 8 with beaters and a disk 9 are mounted, the working surface is attached to the fixed disk 6. Disks 6 and 9 are mounted coaxially with a gap 10, are made with cone-shaped bowls covered with large bases to each other, and form a primary crushing mill, which is wrapped around an annular diffuser 11, fixed to the housing 1 and covered with its inlet part to the gap 10. and the diffuser 11 is mounted an annular chute 12 with double-sided bends arranged at an angle taken within the limits described by the relation

2 arcsm- a 90,

where a is the angle between the sides of the tray;

P - the size of the gap between the walls of the diffuser;

L is the length of the side of the tray.

The annular tray 12 is made with pie cutouts, evenly spaced around the circumference of the tray and alternating

0

five

0

with each other. The pipe 13 is designed for unloading the finished sample.

Installation for sampling bulk materials works as follows.

The drive shaft 7 is turned on and the source material is fed through a feed hopper 4 fixed on the lid 3 of the housing 1 to the chamber of the primary grinding mill formed by the cone-shaped bowls of the disks b and 9. As a result of the disk 9 turning the material 9 under the action of centrifugal cylinders enter the gap 10, where they are ground to the required fineness and thrown into the annular diffuser 11, where the particle flow rate decreases with a corresponding increase in pressure. As a result, the movement of particles of various sizes is stabilized and the vortex formation sharply decreases. Further, the stream is divided into two streams by an annular chute 12. One stream is discharged through the discharge port 2 to the discharge, and the other falls between the rotor 8 beams and the bars 5 of body I, where it is further crushed, and is discharged through the port 13.

Claims (1)

Invention Formula Installation for sampling bulk materials according to ed. St. No. 1045929, characterized in that, in order to increase the grinding efficiency and the accuracy of dividing the samples by reducing the vortex formation, the installation is equipped with an annular diffuser fixedly mounted between the disks and an annular trayko. The inlet of the diffuser is facing the disks.