SU914083A1 - Apparatus for crushing solid granulated material - Google Patents

Description

The invention relates to chemical technology, namely, devices for crushing solid granular products, mainly chromic anhydride.

Known twin roll crusher, designed for non-metallic materials, containing rassnye work rolls, drive and means of supplying the source material [1].

However, the known crusher has limited application from the point of view of the granulometry of the processed material, since for its efficient operation the material must be sufficiently uniform and fine fractions.

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The closest to the invention by the technical essence is a device for crushing hard granular materials, comprising a horizontal drum with a grate in its lower part _I and an axial conduit for supplying material and mounted coaxially in the drum rotor of the actuator. The device has a large rotor and is equipped with

2

high-speed engine, because the material is crushed by a free kick [2].

A disadvantage of this device is that the finished product contains a lot of fines and dust, and the product fraction has a large variation in particle size distribution.

The purpose of the invention is to improve the uniformity of the particle size distribution of the finished product.

This goal is achieved by the fact that in a device for crushing solid granular materials containing horizontally located drum with a grate in its lower part and an axial nozzle for feeding material, as well as a rotor with an actuator coaxially mounted in a drum, the drum and rotor are made in the form of cones with decreasing in the direction of movement of the material gap between them, and the rotor is equipped with blades mounted on its working surface along a helical line and made with a height proportional to cell gap between the cones.

914083

The pipe for feeding the material is provided with a screw feeder connected to the rotor and a grate placed under the screw feeder.

FIG. 1 shows a device for crushing solid granular material, a slit; in fig. 2 is a section A-A in FIG. one.

The device contains a horizontal conical drum 1 with a grate

2. The coaxial conical rotor 3 with a drive (not shown) is located in the drum. To supply the source material is the pipe 4, which houses the screw feeder 5 connected to the rotor 3.

The gap 6 between the cones is made decreasing in the direction to the discharge gap 7.

The working surface of the rotor is equipped with a blade 8 placed along a helical line, and the height is proportional to the height of the gap 6.

The pipe 4 is also made with grate 9, located under the screw feeder.

The device works as follows.

The source material is fed into the pipe 4 and then through a screw feeder into the gap 6 between the cones.

In this case, the separation of particles having a size smaller than a calibrated gap B (FIG. 1) begins already in the process of transporting and moving material over the calibrated holes (slits) of width B of the lattice 9.

Further, the material is cleaved by cone blades 8, crushed between cones, falls into calibrated slots, B of lattice 2 or moves under the action of gravity further along the slit into a smaller gap until the remaining particles pass through the unloading slit 7 - control concentric gap (also by value B) on device output.

Thus, the calibrated size of the slit B in the classification provides mainly the specified size of the material, i.e. the alignment of the particle size distribution of the product, makes it possible not to grind the fine product and adjust the “krupnyak”

5 under the specified size B.

The marketable chromic anhydride that has passed through the device has a more even grain size distribution, which makes it possible to obtain the required weight of the packaged product of the container without the additional cost of manual and mechanical labor (tamping and tamping).

Claims (2)

Claim 15 1. A device for crushing solid granular material containing a horizontally positioned drum with a grate in its lower part and an axial nozzle for feeding the material, as well as a rotor e driven coaxially in the drum, characterized in that, in order to increase the uniformity of the particle size distribution of the finished product, _{25, the} drum and the rotor are made in the form of cones with a decrease in the direction of movement of the material of the gap between them, and the rotor is equipped with blades attached to the working surface along the helix and made with a height proportional to the height of the gap between the cones. 2. Device by π. 1, that is, by the fact that the material supply nozzle is equipped with a screw feeder connected to the rotor and placed under 35 screw feeder grate.