SU1433495A2 - Vertical mill - Google Patents

Abstract

The invention relates to the technique of grinding solid materials and can be used, for example, in the processing of diamond-containing raw materials. The aim of the invention is to increase -. improving the operational reliability of the device. For this, the angle of inclination ct of the blades 25 of armor plates 26, with which the material is moved downward, is greater than the angle of inclination of the blades 25 of armor plates 27, which move the material upwards, with the angles of inclination of the blades alternating (through smooth armor plates 28) Rows are related to each other by the above ratio. 3 il.

Description

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The invention relates to apparatus for grinding mineral raw materials, is an improvement of the device according to ed. No. 814451, can be used in the mining, chemical and other industries.

The purpose of the invention is to increase the operational reliability of the device.

FIG. 1 shows schematically JQ non-cast with blades, moreover,

on the proposed vertical mill, a partial longitudinal section} in FIG. 2 - working surface of the internal rotating cylinder with blades, scanning; in fig. 3 is an example of a structural embodiment of rubber shock absorbers for attaching an external cylinder.

The vertical mill contains a frame 1, an outer cylinder 2 with an elastic (rubber) lining 3, rotating- with an inner cylinder 4, rigidly connected with an annular bottom 5 of the working cavity and with a shaft 6 installed in bearing units 7 and 8, a loading unit containing 1 hopper 9, feed hopper 10, central cone-distributor 11 and water supply collector 12, device for pushing material into the working cavity made in the form of a ring 13 with blades 14 on its outer side and installed in the upper part of the inner cylinder 4 above or at the level of the conical part of the hopper 10, a discharge unit containing an annular discharge chute 15 I with a chute 16, fixed on a rotatable bottom 5 annular elastic | unload intensifier 17, an annular gate 18 made of an elastic material , for example rubber,: And installed to form a discharge gap at the lower end of the outer cylinder 2 with the aid of a collar 19; Manifold 20 of water, drive 21: kinematically connected to the shaft 6 through a conical pair 22. Inner cylinder 4 is lined with an armored plate and 23 which are connected thereto at the bottom by means of staples 24 and at the top - and ring bolts 13. Part of armor plate 23 has a smooth working surface, and another part is on the outer poverhnos gi blade 25 to move in the axial direction of the material. Lo-Mouth 25 on armor plates 23 are inclined 17 ° to the direction of their movement and are spaced apart from one another

Scientific research institute, big three sizes most krupnps pieces-grains of the crushed material. The inclination of the blades of 25 on different surfaces is mutually opposite. The arrangement of the armor plates 23 on the inner cylinder 4 is such that the brooches with the blades 26 and 27 alternate with the smooth arm-shades 28. They brood along the mutually opposite inclination of the blades. Angles uL, and s. the inclination of the blades 25 to the diametrical section. or horizon is less than the friction angle, but on armor plates with mutually opposite tilt, they are different and are determined from the ratio

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tgui, - teoL where oi, to OS „Q

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angles of inclination of the blades in the adjacent rows, respectively, downwards and upwards — j Q — productivity

mills for solid, mz / h;

CO is the frequency of rotation of the inner cylinder, rev / cj b is the width of the blade, m; L is the circumference of the inner cylinder, m. The outer cylinder 2 in the upper part is rigidly connected to the inlet funnel 10, and in the middle part is fixed on the frame 1 with elastic elements 29 on the frame 1. An example of a constructive design of the mounting of the outer cylinder 2 on the frame 1 using elastic elements (rubber shock absorbers) 29 is shown in FIG. 3. The central rod 30 is at the same time the position to change the position of the outer cylinder 2 and the feed hopper 10 relative to the bottom 5 of the working cavity and the means for pushing the material into the working cavity.

The vertical mill works in the following way.

The crumbling, abrasion, peeling of lumpy or granular material from the hopper 9 enters the cone-distributor 11 of the loading unit, which distributes it around the perimeter of the loading funnel 10, from where the blades 14 of the ring 13 rotating together with the inner cylinder 4 and armored plates 23 are pushed into working cavity formed by the lining of the outer cylinder 3 and armor

plates 23. Through the water inlet manifold 12 into the feed hopper 10 and further with the material, ode is fed into the working cavity. Passing through the working cavity, the material is crushed (worn out) as a result of interaction with armor plates 23 and broken into the chute 15 through an annular discharge slot formed by the bottom 5 and gate 18. Because of the fact that the blades 25 on the rotating armored plates 23 are mutually opposite, they are just move the processed material up and down, and down due to a large angle of inclination to a greater extent than up and, moreover, involve the material in a circular motion

on the annular working cavity. The material in the working cavity thus moves along a wavy screw path of m. As a result of this movement, its crushing (attrition) occurs both as a result of interaction with the rotating armor plates 23 and their blades 25, and as a result of interaction (friction) of the layers adjacent to the armor plates 23 and the lining 3 of the outer cylinder 2. The blades 25 of the armor 23 are promoting the material down for a longer distance, up and as a result, it moves progressively from loading to unloading and pressing of the working cavity throughout the working cavity. Due to the fact that the outer cylinder

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2 is mounted on frame 1 by means of elastic elements (rubber shock absorbers), it has flexibility in both radial and axial directions. As a result, the interaction force of the material being processed with the lining .3 of the outer cylinder 2 does not exceed the squeezing force of the elastic elements, the internal rotating cylinder 4 is not seized, the lining 3 is not broken and its wear is reduced, and strong, non-melted pieces of material are prevented from passing.

№ 814451, about

Claims (1)

Invention Formula Vertical mill on the autor. This is due to the fact that, in order to increase operational reliability, the blades in adjacent rows are made with different angles of inclination, determined from № 814451, about tgot, - tgod4 where oi,, 064 05-b L2. ten with b L angles of inclination of the blades in adjacent rows; -productivity of the mill in solid, m / h; - rotation frequency of the inner cylinder, rev / s; -the width of the blades, m; - circumference of the inner cylinder, m Raw material 00-8; Water 29 29 0U2.3