SU831170A1 - Apparatus for disintegrating and classifying mainly loose materials - Google Patents

Description

one

The invention relates to a technique for the separation of bulk materials and can be used, for example, in process lines for the preparation of glass batch components.

A device is known in which the classifiers operate in a closed loop with shredders, comprising a cylindrical rotating housing with grinding rollers freely located in it, equipped with preliminary and reference classification chambers made in the form of perforated cylinders. Grinding rollers have holes in which spiral blades are mounted. The control classification chamber is equipped with blades and an inclined chute for returning the ground material to the grinding zone D1.

Closest to the present invention is a device comprising a housing with a shredder located therein and covering the last turn.

| drum classifier, feeder and drive L2J.

The disadvantages of these devices are their structural complexity and material intensity. In addition, they have relatively low productivity due to the impossibility of returning large fractions to regrind.

The purpose of the invention is to increase the productivity and efficiency of the process.

The goal is achieved in that, in a device comprising a housing with a chopper located therein and a rotary drum classifier enclosing the latter, a feeder and a drive, the chopper is mounted on the frame coaxially with the feeder and the drum classifier and provided with a trap funnel and guide tray, the drum classifier guide vanes.

In Fig.1 schematically shows the proposed device, the cut; on

383

figure 2 - section aa in figure 1; Figure 3, kinematic device diagram.

The device comprises a housing 1 with two fixed trunnions 2 and a discharge hopper 3. The truss 4 is rigidly fixed on the trunnions. A double-pswalk crusher 5 is mounted on the frame. To ensure rotation of the drum classifier 6, slide bearings are installed on the trunnions. The device also has a shaft 8 and a drive 9. A screw feeder 10, a crusher roller 11 and a gear 12 are seated on the shaft. The device is equipped with a gear system 13-17 (FIG. 3). Providing counter rotation of the second roller of the crusher 18 and the drum classifier on the classifying surface two blades 19 are installed diametrically. A catching funnel 20 is installed on the frame above the crusher, and a guide chute 21 is fixed under the rollers on the frame (figure 1 is shown not dissected). The angle of attachment of the tray is determined in accordance with the angle of repose of the material being processed. In order to prevent dust from falling on. gears, they are closed by a protective casing 22.

The device works as follows.

The drive 9 rotates the shaft 8. At the same time, the screw feeder 10, the roller And the crushers and the gear 12 come into rotation. Thanks to the gears system 12-15 (fig. 3), the second roller of the crusher 18 counter-rotates, and through the gears system 12-16 rotation is transmitted to gear 17, with which the drum classifier is rigidly rotated with it. The gear system provides rotation of the classifier and shredder at optimal speeds. the crushers rotate at a speed of rpm, while the speed of rotation of the drum classifier is 12 rpm.

The raw materials supplied by the screw feeder 10 undergo a separation stage in a drum class

Feeder 6. Undersize fractions fall into the discharge hopper 3. The oversize fractions are captured by the paddles and, having described an arc of not more than 180, are poured into the collecting funnel 20, from where they enter the chopper. Thus, when the drum rotates in the specified direction, its right part is free from the sheath

fractions.

Having passed the regrinding stage, the materials on the guide tray 21 are returned to the classification zone free from the perreshet fractions. The final product enters the discharge hopper 3.

The application of the proposed device simplifies the design, material consumption is reduced. Significantly reduced device dimensions. Due to the presence of the guide pan, the crushed materials enter the separation zone free from the oversize fractions, which increases the efficiency of the classification.

Claims (2)

Invention Formula A device for grinding and classifying mainly loose materials. materials comprising a housing with a grinder disposed therein and a rotary drum classifier enclosing the latter, a feeder and an actuator characterized by so that, in order to increase production and efficiency, the shredder is installed on the frame coaxially with the feeder and drum classifier and provided with a catching funnel and guide tray. 2. The device according to claim 1, of which is: in that the drum classifier is equipped with guide vanes in Information sources, taken into account in the examination 1, USSR Author's Certificate No. 360969, cl. B 02 C 15/16, 1975. 2. USSR author's certificate number 165069, cl. B 02 C 13/13, 1962 (prototype). iW / V. / L l; v   e to 9 rt TH fl 0 ff "-" Figure 1 f ... ..j. , /. . | -: FIG. 2 Lg. G. . l --- f.:; :: .., h sixteen P 13 X and P){ ) / 7 Fig.Z P