UA16900U - Lining of rattler - Google Patents

Abstract

A lining of a rattler contains a set of rubber plates, metallic bars with undulating working surface, channels for metallic grinding balls, fastening elements.

Description

Description of the invention

The useful model refers to the linings of the surface of drum and tube mills mainly with 2 grinding balls and can be used in the mining, energy, construction and chemical industries.

The well-known lining of a drum mill according to Russian patent Mo 0005539 I, MPKbE VO2S 17/22, publ. 16.12.1997, which consists of a set of used rubber plates of a round groove profile, installed on the inner surface of the drum along the longitudinal axis, and fastening elements.

The disadvantage is the loose laying of round-grooved rubber plates to the surface of the drum, which leads to 70% abrasive wear of the mill body due to the penetration of pulp under the plates, and poor protection of the fastening elements.

More perfect is the well-known similar lining of the self-grinding drum mill under the KI patent,

Mo2040969, SI, MPKb VO2S 17/22, 09.08.95; KO, Mo2124947, SI, MPKb В02С 17/22, 20.01.99, which contains removable sections that have rod lifters, i.e. beams, located radially in rows along the axis of the drum on the working surface of the 12 sections and having a variety of smaller, medium and large heights in the adjacent in rows and installed at different steps from each other.

Such implementation and arrangement of lifters, i.e. beams along the perimeter of the lining, ensures selective capture, retention and lifting by lifters of each dimensional series of lumps of crushed material of a clearly defined size. The lifters of greater height are installed with a larger step than the lifters of the adjacent row, capture large lumps of crushed material and pass smaller lumps between them. Lifters of a smaller height are installed with a smaller step and capture lumps of material of the corresponding size. Thanks to this, the efficiency of material crushing increases and the productivity of the self-grinding drum mill increases.

The disadvantage of the lining of this design is low resistance to shock loads affecting both the upper and side working surfaces of rod lifters. As a result, this lining is also characterized by a low service life.

To increase the resistance of the lining to shock loads and abrasive impact, the lifters are lined with a wear-resistant material.

A similar lining of a drum mill is known (ZO Mo1829962, AZ, MPK 5 VO2S 17/22, 23.07.93), which contains alternating plates and lifters of different heights, which are made in the form of longitudinal ribs of elastomeric material, and which have on its front face (relative to the direction of rotation) a hard wear-resistant layer made, for example, of steel. The hard wear-resistant layer rests on the elastomeric material of the rib, to which it is attached by chemical (vulcanization) and/or mechanical (bolts or staples) means. The lower parts of the ribs. "o reinforced with embedded elements installed in the grooves and connected with the help of fastening elements to the 3o drum of the mill. --

With such a design, the elastomeric material dampens the hard wear-resistant layer, provides its shock absorption and minimizes cracking and abrasive wear of the said hard layer. "

However, the dynamics of the effect of shock loads on the elastomeric material of the ribs of such a liner improves from 70 insignificant and practically remains the same, as a result of which its service life increases, but not significantly. c The closest analogue to the declared useful model in terms of a set of matching features and technical

From" the result that is achieved is the lining of the drum mill according to the Russian patent Mo 2153936, МПК 7 ВО2 С 17/22, which consists of a set of rubber plates installed on the inner surface of the drum along its longitudinal axis and attached to the drum by metal bars with a wavy working surface, and fasteners passed through holes in the bars and drum of the mill. - In contrast to the declared useful model in the given lining of the drum mill, the bars have

Ge") cone-shaped in cross-section with a wave profile top and made with conical glasses at the base and through holes in them for fastening elements. Bars can be made of metal or rubber. Along the edges, the beams have horizontal shelves, which are also connected to the top of the wave profile. aw! 20 The disadvantage of the lining of this design is also low resistance to impact loads affecting both the upper and side working surfaces of the beams. As a result, this lining is also characterized by a low service life.

The invention is based on the task of improving the lining of the drum mill, by changing the design elements of the lining and the relationship between them, to achieve an increase in the resistance of the lining to impact loads and abrasive effects, thereby ensuring an increase in the service life of the lining and the efficiency of grinding the material.

The problem is solved by the fact that in the lining of a drum mill, mainly mills with metal grinding balls, which consists of a set of rubber plates installed on the inner surface of the drum along its longitudinal axis and attached to the drum by metal bars with a wavy working surface formed by 60 channels for metal grinding mills balls, and fasteners, according to a useful model, the beam in cross-section has a shape close to the shape of a rectangle with a convex upper face, on which channels for metal grinding balls are made inclined to the longitudinal axis of the beam with a channel width that decreases towards the base of the beam, rubber plates have a symmetrical stepped profile formed by longitudinal shelves sloping inward at the edges, in the side faces of the rubber plates there are symmetrically made grooves for fastening elements, and the ends of the rubber plates 62 are made with a slope.

At the same time, the reduction of the width of the channel to the base of the beam is made with the possibility of fixing metal grinding balls in the channels of the beam.

Grooves are made at the base of the beam.

The essence of the useful model is explained by the drawings, where on:

Fig. 1 - the lining of the drum mill is shown in cross-section;

Fig. 2 - the beam of the lining of the drum mill (top view);

Fig. 3 - beam in cross-section along (А-А);

Fig. 4 - a beam of a drum mill with metal grinding balls fixed in the channels of its 70 wave-shaped working surface in the cross section along (B-B);

Fig. 5 - rubber plate (top view);

Fig. 6 - rubber plate in cross-section along (B-B);

Fig. 7 - rubber plate in cross-section along (G-G).

The lining of the drum mill is mainly a mill with metal grinding balls 1, which consists of a set of rubber plates 2 installed on the inner surface of the drum Z along its longitudinal axis. Rubber plates 2 are attached to the surface of the drum With metal bars 4 fastening elements 5 passed through the holes b in the bars 4, grooves 7 in the rubber plates 2 and holes 8 in the drum C of the mill. Bars 4 have a convex wavy working surface 9, which is formed by channels 10 for metal grinding balls 1. Bar 4 in cross-section has a shape close to the shape of a square with a convex wavy working surface 9. Channels 10 for metal grinding balls 1 are made inclined to the longitudinal axis beam 4, with their width decreasing to the base of the beam.

Plates 2 have a symmetrical stepped profile, formed by longitudinal shelves 12 sloping inward at the edges. Grooves 7 for fastening elements 5 are made in the side faces of plates 2. The ends of plates 2 are made with a slope 13. Grooves 14 are made at the base of beam 4.

The lining of the drum mill works as follows.

After installing rubber plates 2 on the inner surface of the drum, along its longitudinal axis and attaching them to the drum 2 with metal bars 4 using fasteners 5, passed through the holes 8 in the bars 4, grooves 7 in the rubber plates 2 and holes 8 in the drum From the mill, a closed ring with a wave surface is formed. At the same time, the high density of the lining is achieved by the fact that the adjacent rubber plates 2 on the side faces are installed flush with overlapping of their inclined inside shelves 12, and on the ends of the rubber plates 2 o

They are hammered along the inclined surface 13. The wavy surface of the lining is achieved by the fact that the beams 4 protruding above the surface of the plates 2 have a shape close to the shape of a square with a wavy working surface, on which channels 10 for metal grinding balls 1 are made at an angle to the longitudinal axis of the beam 4. Gee!

The raw material loaded into the mill with metal grinding balls 1, during the rotation of the drum C and thanks to its wave surface, rises and rolls down in parallel layers, which leads to its re)crushing and grinding. During the operation of the drum mill, the bars 4 are self-lining with metal "- grinding balls 1, which enter the inclined channels 10 and are fixed in them. This gives the bars 4 additional resistance to abrasive wear.

In this way, an increase in the resistance of beams 4 to shock loads and abrasive impact is achieved, which made it possible to increase the service life of the lining and the efficiency of grinding the material. The fixation of 70 metal grinding balls 1 in the inclined channels 10 is ensured by the fact that the inclined channels 10 have a width of /-7- s which decreases to the base of the beam 4. The reduction of the width of the inclined channel 10 is made with the possibility of dense. landing and fixation of the metal grinding ball 17, in it. The length of the inclined channel is taken not less than the diameter u? metal grinding ball 1. Its inclination to the longitudinal axis of the beam prevents it from flying out of the channels 10, which also contributes to its reliable fixation in the mentioned channel. The rectangular cross-section of the beam is taken in order to achieve the optimal length of the inclined channel 10, preventing the advancement of the metal grinding ball in it. In order to reduce the metal capacity, grooves 14 are made in the base of the beam.

Claims (3)

The formula of the invention se) , o 1. Lining of a drum mill, preferably a mill with metal grinding balls, which consists of a set of rubber plates installed on the inner surface of the drum along its longitudinal axis and attached to the drum by metal bars with a wavy working surface formed by channels for metal grinding balls, and fastening elements, which is distinguished by the fact that the beam in cross-section has a shape close to the shape of a rectangle with a convex upper face, on which the channels for the metal grinding balls are made inclined to the longitudinal axis of the beam with the width of the channel decreasing towards the base of the beam, rubber plates have a symmetrical and stepped the profile formed by longitudinal shelves sloping inward at the edges, in the side faces of the rubber plates there are symmetrically made grooves for fastening elements, and the ends of the rubber plates are made with an inclination. 2. Lining of the drum mill according to claim 1, which differs in that the reduction of the width of the channel to the base in the bar is made with the possibility of fixing the metal grinding ball in the channels of the bar. 3. Lining of a drum mill according to claims 1, 2, which differs in that grooves are made in the base of the beam. b5