SU1393477A1 - Mill for superfine milling of materials - Google Patents

Abstract

The grinder refers to machines for ultra-fine grinding of dry cp 1 material and can be used in the chemical, pharmaceutical, pharmaceutical and other industries. The goal is to increase the grinding efficiency. The disks 18, 19, 20 of the shaft have additional impact elements (in the form of 21 straight-angled forms 1, 1). On the non-working-peripheral parts of the disks and partitions 5, 6 there are radially concentric rows of rectangular blades and perforated rings. and the shape of the blades and rings allow to obtain at the output of the shredder a radically sized product of improved grain composition and to increase the productivity of the bore 1. 1 Cp of f-crystals, 5, or S (L

Description

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The invention relates to machines of ultrafine and: grinding dry bulk materials and can be used in the chemical, pharmaceutical, food and other industries of the industry.

The aim of the invention is to increase the efficiency of the grinding process.

FIG. 1 shows the proposed mill, section; in fig. 2 — node I in FIG. one; in fig. 3 is a section A-A in FIG. 2; in fig. 4 — node II in FIG. one; in fig. 5 is a section BB in FIG. four.

The mill (Fig. 1) contains a housing consisting of separate chambers 1-3, on flat partitions 4-6 of which the working bodies 7 and 8 are strengthened. Chambers 1 - 3 are equipped with jackets 9 - 1 1 for cooling the product and reflective strips 12 and 13, made of a trapezoidal shape and set at an angle to the direction of movement of the material. For loading the source material, cooling water outlet and unloading the READY1-O product, there are respectively nozzles 14-16

Disks 18-20 are fixed on the drive shaft 17, on the face planes of which the working bodies 7 and 8 are located, the disks 18-20 have a hammer 21, mounted radially on the lateral surface and made rectangular in shape. On the non-working surface of the disk 18 are located radially concentric rows of rectangular blades 22, between which are placed the blades 23 located on the partition 5, on the non-working surfaces of the disk 19 and the partitions 6 cylindrical rings 24, 25, eccentrically relative to each other are fixed. Rings 24 and 25 are made of shells with holes arranged with the same angular displacement along the radius, with the openings made in the form of truncated cones, directed with large bases towards each other.

The mill works as follows.

When the mill shaft rotates at a high angular velocity, the working bodies create a ventilation effect. Air is sucked through the nozzle 14, passes through all the chambers and exits through the discharge nozzle 16. Thus

7 2

the mill creates a stream of air to transport material through all the chambers.

The source material through the loading nozzle enters the chamber 1 and moves intake air between the partition 4 and the disk 18, passes in a radial direction through the rows of working parts 7, where it is preliminarily crushed, and is thrown onto the strips 12, then picked up by the strips 21 and again crushed . When passing to the next chamber 2, the material flow is directed through the system of blades 22 and 23, where it is preliminarily classified and enters the chamber 2 through the overflow opening. In this grinding zone, the material moves between the baffle 5 and the disk 19 in this grinding zone and the axial directions and is again thrown onto the strips 12, interacts with the beams 21. When passing into the chamber 3, the material flow passes radially between the disk 19 and the partition 6 through a system of classifying rings 24 and 2b. Particles larger than the boundary size get accelerated and are carried away to a variable cross-sectional area, from where centrifugal force is thrown under the billes. Particles smaller than the limiting size in the air stream pass through the orifices and are directed to chamber 3. The finally ground material from chamber 3 is carried by air through the discharge port 16.

Claims (2)

1. Mill for ultrafine grinding of bulk materials, comprising a body divided into cylindrical chambers by vertical partitions coaxial with central holes, a horizontal shaft with disks arranged in cylindrical chambers, plate swirlers fixed by radially concentric rows on opposite surfaces on one side of the partitions and disks mounted on the ends of the disks of a rectangular-shaped disk and mounted on the body reflective strips located obliquely sheniyu to the direction of flow of the material, characterized in that, in order to increase effektiv31 T) 5 inMrjii. U MitH, the prril cylindrical chamber is equipped with rectangular vanes mounted in radial concentric rows,. on the back side of the disk and on the iri- dying surface of the partition, with rows of blades on a partition plate located between rows of blades on the disc, the last of which are made in the form of rectangular plates, the ratio of thickness to pitch of placement is 0.35 -0.4, with 7 The second cylindrical chamber of the SIGHGH is installed on the back side of the disk and on the opposite surface of the partition by cylindrical rings having openings with the same angular displacement, the cylindrical ring of the partition eccentrically enclosing the cylindrical ring of the disk. 2. Mill according to claim 1, that is, so that the reflective strips have a trapezoidal section. FIG. 2 /(-BUT FIG. 3 Sosta1ig; -c; e J. Petrakov Order 1906/8 Circulation 581; VISHI State Committee of the USSR Inventions and Discoveries 13035, Moscow, FH, Raushsk Pub., 4/5 1393477 /) FIG. five 11od - isnoe