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sharjah tangible benefits medium ilmenite roll crusher

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Spiral separators, which are also called spiral concentrators, are gravity devices that separate minerals of different specific gravity according to their relative movement in response to gravity, centrifugal force and other forces in the fluid medium

ca1185580a - roll-crusher - google patents

55~The invention relates to a roll-crusher, wherein a roll is provid-ed with rings of teeth spaced axially from each other and designed to move with a shearing action be-tween the teeth of a grating, partly surrounding the roll on its underside and to one side the grating being adapted to be swung out of the range of the roll teeth.Crushers of this kind are used for crushing scrap material. Since such material often contains tough or flexible elements which become lodged in the teeth of the grating during the crushing process. the grating must frequently be cleared of scrap material fragments and damaged parts replaced.In the case of known roll-crushers of this kind ~British Patent 1,366,975), a grating, arranged laterally of a roll, is adapted to be swung away from the roll by its upper end, so that its teeth are disengaged from the teeth of the roll. Even when the grating is swung out~ however, it is not easily accessible and is therefore difflcult to clean and overhaul.This invention seeks to provide a roll-crusher wherein the grating can be swung in such a manner that the teeth may be cleaned and replaced conveniently and without difficulty. According to the invention, this is achiev-ed hy adapting the grating to pivot about an axis provided at its end located under the roll, into a position in which i~ hangs downwards away from the underside of the roll, thereby exposing the entire working surEace of the grating with its teeth.Similarly, in the case of a two roll crusher, which is provided with a common grating that extends from below lnto the nip formed by the two rolls, the complete grating is mounted to pivot downwards, about an axis located at its end and under one of the two rolls, into a hanging position, thereby exposing the entire operating surface and teeth.This grating arrangement may also be used, under certain circum-5SB~stances, with single or dual-rotor hammer-crushers in which the hammers strike between the -teeth of the grating. In crushers of this kind, already known in the art, ~he gratings are generally arranged to pivot outwardly about axles provided at their upper ends, adJacent the rotor. In this position the operat-ing surfaces of the gratings are not easily accessible. Also, in these machines, the pivot axle is arranged at the upper end of the grating in order to (1) bring the lower end more or less close to the rotor for the purpose of setting the degree of crushing (British Patent 1,249,738~, or (2~ because when a piece of material which cannot be crushed enters the crusher, it must be possible to widen the crushing gap to ensure free passage of the said piece of material ~German AS 1,211,908~. Also known are hammer mills with gratings, in which the grating is mounted to pivot about an axle provided at its lower end arranged below the rotor (German Patent 704,853 and 450,4813 United States Patent 2,149,571). In all of these cases, however, the outward-pivoting move-ment is so restricted that the grating cannot hang downwards in a position allowing it to be freely accessible from one or both sides.This invention provides for a crusher housing which extends down-wards below the crushing mechanism, in the form of a funnel for example. Aclosable aperture is provided at least on the side of the housing or housing funnel opposite the pivot axis and on a level with the downwards hanging grating, such that the grating is readily accessible. In certain cases, it is desirable to provide an aperture on both sides so tllat material jammed on the underside of the grating can be knocked off.~n a preferred embodiment of the invention, a grating which is simple and inexpensive to produce comprises at least two pivotably mo~mted side elements, with rails running parallel with the pivot axle and joining the side elements together; the rails supporting grating plates with grating teeth arranged on edge. It is a simple matter to adapt a grating of this kind to the rolls, and furthermore it is easy ~o replace any damaged parts. If the grating is intended for a two roll crusher, in which the teeth rings of the rolls are staggered axially in relation to each other, the grating is provided with a central rail and two outer rails. The grating plates on one side of the central rail are staggered in relation to the grating plates on the other side, thus allowing the roll teeth to move therebetween.The rails are preferably provided with guides, e.g. guide grooves into which the grating plates are loosely inserted.A two roll crusher of this kind is particularly suitable for pro-cessing scrap batteries. In contrast to single roll crushers, which do not have the large drawing-in angle, a two roll crusher can draw whole, acid-filled batteries i-nto the gap between the two rolls, thus allowing the roll teeth, which rotate in synchronism, to pierce or cut through the battery cases. The acid can drain downwards. The batteries are very extensively crushed between the rotating roll teeth and the stationary grating teeth, allowing the resulting fragments to be separated b~ known separating processes. However, it is impossible to prevent parts of the battery cases made of towgh polypropylene, as well as pieces of lead, from wrapping themselves around the grating teeth or grating plates. It is thus extremely important to be able not only to move the grating into a position in which it is easily accessible, but also to~be able to clean the grating teeth thoroughly. Sometimes it is necessary to remove them from the frame of the grating, or replace them.It is desirable for the grating plates to have grating teeth arranged one behind the other. The front flanks of both the grating teeth and the roll teeth are preferably arranged in such a manner as to produce a shearing effect. ~s the roll teeth pass by the grating teeth, the cut takes place 5~ approximately in the direction of the centre of the roll. The grating plates may be made relatively thin if transverse webs are provided on their lateral surfaces to support them. Since crushing tools must, under certain conditions be made of an expensive acid-resistant material, it is of considerable economic significance that the grating plates are thin.In order to facilitate easy removal and installation of the grating as a whole, the grating is mounted by its side elements on insertable axles arranged in the lateral walls of the crusher-housing. At the relevant locations, these walls are provided with reinforcements arranged externally to the axle and bearing bushings which unite the reinforcemen*s for the insertable axles.The use of insertable axles makes it possible to locate the pivot axis close to the roll under which it is arranged within the range of movement of the roll teeth; thus when the grating is released, it does not extend too far in the downward direction.The grating is moved from the operative position into the downwards hanging position, and vice-versa, preferably by means of two hydraulic cylinder-piston units which are mounted pivotably on each side of the crusher housing, engaging with levers located externally upon the insertable axles.The invention is illustrated in the drawing attached hereto, wherein: Figure 1 is a side elevation of a two roll crusher with the grating swung down (the operative position is indicated in dotted lines);Figure 2 is a perspective view of the grating to an enlarged scale, with some of the grating plates removed;Figure 3 is a diagrammatic representation of the meshing of the roll teeth and the grating teeth; and Figure 4 is a section through one of the insertable axle arrange-ments for the pivotable mounting of the grating. ~85S~ The roll crusher illustrated in Pigure 1 comprises, within a housing 1, two rolls 2 equipped with rings of peripheral roll teeth 3 spaced axially apart, the rolls being driven in opposite directions, as indicated by arrows 4. Located under the said rolls is a grating 5, provided with grating teeth 6 which, in the operative position indicated in dotted lines, engage between the rings of teeth on the said rolls.Figure 2 illustrates that grating 5 consists of two side elements 7, of three rails uniting the said side elements, namely a central rail 8 and two lateral rails 9, and of grating plates 10 carried on the rails, running at right angles thereto, and standing on edge, the contours of the plates constituting grating teeth 6.The lateral surfaces of the grating plates carry transverse webs 11 for mutual support. Grooves 12 in rails 8, 9 act as guides for the said grating plates.The ends of side elements 7 of grating 5 are provided with holes 13, 28 in which insertable axles 14, 15, mounted in the lateral walls of housing 1, engage. The lateral walls of the housing have reinforcements 16, 17 for the axle mountings and bearing bushings 18 for the axles are arranged in each of the reinforcements, as shown in cross-section in Figure 4. Grating 5 is adapted to be pivoted by insertable axles 15 which are secured against rotation in relation to side elements 7 by means of s~uare holes 28. The axles are rotated by levers 19 which are acted upon by two hydraulic cylinder-piston units 20, mounted pivotably on each side of housing 1.After the grating has been swung down about insertable axles 15, it reaches the position shown in full lines in Figure 1 in which it projects into a discharge hopper 21 in housing 1. On the side facing the downwardly hanging gra~ing the said housing is provided with an opening 23 adapted to be closed by an ~5~ easily openable flap 22. In this position, the grating is easily accessible through this opening. A closable opening 24 is also provided on the other side of discharge hopper 21.As sho~l in Figure 3, front flanks 25, 26 of the roll teeth and the grating teeth are arranged in such a manner as to produce a shearing action as rolls 2 rotate, with angle ~ preferably opening towards the centre of the roll.The material to be crushed is fed into the roll-crusher through an opening 27 provided at the top of housing 1. ~ 6 -

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Our company, as leading manufacturer and supplier of mining crushers in China, is located in Zhengzhou city, Henan Province. Our main products are crusher machines for processing over 160 kinds of stones and ores in mining, quarry, construction, road and other industries. Leading products include jaw crusher, impact crusher, cone crusher, mobile crusher, sand making machine, hammer crusher, roller crusher, etc

FTM jaw crusher liner is composed of the liner body, the hollow lightening hole in backside, anti-loose fixture block hole, reinforcing rib, anti-loose fixed block, lifting hole, etc. Each parts strengths of FTM jaw crusher liner will be presented below

Spiral separators, which are also called spiral concentrators, are gravity devices that separate minerals of different specific gravity according to their relative movement in response to gravity, centrifugal force and other forces in the fluid medium

This series of jaw crusher belongs to stone crushing equipment which is widely used in the works of metallurgy, mining, cement, chemistry, refractory and ceramics as well as highway construction and water conservancy.

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