SU1445779A1 - Centrifugal mill - Google Patents

Abstract

The invention relates to the construction of centrifugal mills for grinding wet materials and can be used in the coal, coke, refractory industries and in the production of building materials. The aim of the invention is to increase the efficiency of the grinding process of wet materials. The centrifugal mill includes a bowl 5 with a feed funnel 9 mounted on a cochlea-shaped case 1, inside of which a disk 2 with bilami 4 adjoins the bowl with a gap, with the end of the bowl on the disk side with a notch 11 along the arc 40-85, and the upper edge of the notch located in a horizontal plane passing through the central axis of the bowl. 1 hp ff, 2 ill., 1 tab.

Description

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The invention relates to a device for grinding wet materials and can be used in the coal, coke and chemical industries and in the production of straw. body materials.

The purpose of the invention is to increase the efficiency of the grinding process of wet materials.

1 shows a centrifugal mill, a slit; figure 2 - section aa in Fig, 1.

The centrifugal mill contains a cochlear casing 1, in which a rotor is mounted, made in the form of a disk 2 mounted on a shaft 3. On a disk 2, beats are hinged

As a result, the mill practically works non-stop to clean the cavity of the housing 1 while grinding

4, The disk 2 adjoins the bowl 5 fixed on the housing 1, forming with it a wet (overwetted) butt gap 6, 20, At the exit from the rings, the target gap 6 on the disk 2 is installed scrapers 7. The disk 2 with the housing 1 form a channel 8 of variable section,

To determine the correctness of the choice of the limits of the angle of the sector ledge, a comparative experimental effect is carried out from the bowl 5 through the gaps 6 and 15 into the cavity of the housing 1, the material being additionally crushed by scrapers 7 and evacuated from the cavity of the housing 1 through its discharge opening 10,

The bulk of the crushed material is evacuated from the cavity of the bowl

Q 5 through a relatively large gap 15 along a trajectory close to vertical and directed downwards. Due to this, the material does not fall on the inner surfaces of housing 1, which

5 prevents sticking of the discharge opening 10.

As a result, the mill practically works without stopping to clean the cavity of housing 1 when grinding wet (over-wetted) materials,

wet (over-wetted) materials,

To determine the correctness of the choice of the limits of the angle of the sector step, comparative tests are carried out

The industrial trials of the famous mel- disk 2, increasing in the direction of rotation 25, are attached to the bowl 5 by the dowels and by the grinding funnel 9. During the grinding, the bottom funnel 9. The lower part of the housing with a capacity of up to 30 t / h.

Sa 1 has a discharge hole 10, the end of the bowl 5 on the disk 2 side down from its horizontal axis is made with a sector notch 11, limited by an angle oL equal to 40-85, Depth 12 (Notch 11 is adjusted by installing shims 13 of different thickness, which fastened with screws 14, the total size of the gap 6 and the depth 12 of the recess 11 form an unloading gap 15,

The mill works as follows. -

Before starting the centrifugal mill, depending on the desired degree of grinding material

Thus, the proposed centering of the required gap size 15 through the installation of an adjustable-45 robust mill provides the elevating pads 13 of the desired thickness, the reduction of the efficiency of the grinding process. After this, the minimum allowable gap 6. is set to rotate CQ 2 in the direction of the beginning of the excavation 11, and macchi coal with a humidity of more than 14%,

Claims (1)

1. A centrifugal mill containing a bowl in the form of a rotating body with a horizontal central axis, a feed hopper connected to the bottom of the bowl and a hopper mounted in the coil-shaped case coaxially with the gap and its clearance relative to its end. The electrolyte to be crushed is fed through the feed funnel 9 into the cavity of the bowl 5, where it is crushed by hitting the blows 4 and the particles colliding with each other (self-chopping). The shredded material, which reached the sizes of gaps 6 and 15, under the action of centrifugal force and ventilation 40 In this case, all other things being equal, the stable operation time of 30 mills is determined depending on the moisture content of the coal and the angle oi. notches. The results of the experiments are given in the table. Thus, the stable operation of 35 mills, both known and proposed, ensures a moisture of 12% coal. With increasing humidity from 14 to 18%, the known mill turns out to be practically inoperable. Under the same conditions, the proposed mill is efficient, but at certain angles of the recess arc. Thus, the proposed center 45 mill mill provides an increase in the efficiency of the grinding process. a robust mill provides greater grinding efficiency coal with a humidity of more than 14% The robust mill provides increased grinding process efficiency. Invention Formula The robust mill provides increased grinding process efficiency. 1. A centrifugal mill containing a bowl in the form of a rotating body with a horizontal central axis, a feed hopper connected to the bottom of the bowl and a rotor in the form of a disk with crushing elements mounted on the bottom of the bowl mounted on the cochlear body. characterized in that, in order to improve the efficiency of the grinding process of wet materials, the bowl is made with a notch at the end of the arc, equal to. 40-85, with the upper edge of the notch located in the horizontal plane of the notch 35 40 85 95  jj cq, chg-g- | Ml. , III | Not limited to 1.5-2.0 1.0-1.5 0.5-0.7 ° Not limited to 2.0-3.0 1.5-2.0 0.8-1.2 cheno Unlimited, Unlimited, Unlimited. Unlimited, unlimited. Unlimited, unlimited, unlimited, unlimited cheno Not limited - 2.0-2.5 1.5-2.0 0.5-1.0 The time through which sticking of crushed coal of the body cavity and its discharge opening takes place, Aa Editor I.Gornal Order 6685/11 FIG. g Compiled by L. Chubukova Tehred L. Serdyukova Proofreader I. Muska Circulation 583 Subscription VNIIPI USSR State Committee on affairs of inventions and discoveries 113035, Yoskva, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, unitary enterprise. Project 4 bone passing through the central axis of the bowl. 2, Mill pop, 1, characterized in that the bowl is provided with at least one control shim placed in the recess. - 2.0-2.5 1.5-2.0 0.5-1.0 Proofreader I. Muska