WO2004052546A1

WO2004052546A1 - Dissolving station

Info

Publication number: WO2004052546A1
Application number: PCT/DE2003/003897
Authority: WO
Inventors: Heinrich Müller; Werner Ries
Original assignee: Müller & Co. Aufbereitungstechnik Ag
Priority date: 2002-12-06
Filing date: 2003-11-25
Publication date: 2004-06-24
Also published as: DE20218919U1; EP1567275B1; AU2003292988A1; ZA200503874B; ATE550100T1; EP1567275A1; ES2383264T3

Abstract

Disclosed is a dissolving station comprising a trough which is provided with an inlet and an outlet for granular material that is to be purified. A rotatably driven shaft (14) comprising wedging tools (16) thereupon is disposed along the longitudinal axis of the trough. The material is conveyed through the trough between the inlet and the outlet. The side of the trough, on which the tools rise, narrows towards the top and the interior away from the vertical above the central axis of the shaft (14), whereby the section of the circumference, via which pressure is applied to the material during the upward movement of the tools (16), is extended.

Description

pulping unit

description

The invention relates to a dissolving plant for granular material, in particular for soft-bodied components such as clay and / or clay-laden minerals, nodular mineral conglomerates o. Ä. The plant has a trough with an inlet and an outlet for the good, between inlet and Outlet is conveyed through the trough. In the longitudinal axis of the trough a driven in rotation, equipped with wedge tools shaft is arranged.

EP 0 712 665 A1 discloses a washing system for gravel containing slurries. The system has wash tools that include a wedge angle with the trough circumference to provide a strong wedge effect on the product. This results in a high pressure build-up and a strong squeezing, fretting and dissolving effect on the material to be treated.

For the shape of the trough, no further details can be found in EP 0 712 665 A1. The shape of the trough is basically not critical either, as the trough hogs during operation. This means that a tank forms on the trough wall adhering Guts, which extends in the circumferential direction of the shaft and between the and the wedging tools remains a working gap. The Beschamottieren the trough is desirable because it counteracts the wear.

The typical shape of an upwardly open trough with a shaft therein can be found in DE 24 54 443 A1 or GB 2 081 117 A. The trough has a semi-cylindrical bottom and vertical side walls. The shaft lies in the cylinder longitudinal axis.

The bottom and walls of a trough of the dissolving plant according to the invention can be prefabricated accordingly, but this is not mandatory. Also at In other trough shapes, it can be assumed that this shell inner contour of the trough usually sets in by shuffling.

For effective resolution, it does not make sense to fill the trough beyond the height of the shaft. Above the shaft befindliches Good is essentially only shoveled. There is no noticeable build-up of pressure, as the trough is open at the top and can not dampen it here.

Even in the downward movement of the wedging tools the pressure build-up on the material to be treated is not significant. The estate performs essentially a gravity-assisted fall movement. The pressure build-up crucial to the effectiveness of the dissolution occurs during the upward movement of the wedging tools.

The object of the invention is to provide a dissolving system of the type mentioned with improved dissolution effect.

When solving this task dissolving system, the trough is narrowed at the tool rising side above the central axis of the shaft away from the vertical upwards and inwards. This lengthens the scope over which pressure builds up on the goods in the upward movement of the wedging tools.

Between the narrowing of the trough and the tools, a wedging action takes place, either directly, or between the tools and a shell with which the constriction hogs.

While in conventional troughs the central angle, over which an upward movement of the wedging tools with strong wedging action takes place, is on the order of 90 °, can be extended by the inventive narrowing of these Zentriwinkel by up to 35 ° above the horizontal. This is accompanied by a considerable improvement in the dissolution effect.

In a preferred embodiment, the trough is retracted to form the constriction. In an alternative preferred embodiment, the trough is narrowed by an insert therein.

Both forms of constriction can also be combined. There is then a retracted trough with a suitable insert.

The trough narrowing the insert can be rigid. An advantage of this variant is that the insert easily hoggles. But there is a risk of damage in a transition to coarser grain or the unexpected accumulation of coarse-grained impurities in the estate.

In a preferred embodiment, therefore, the trough narrowing insert is movable. The insert can be articulated in particular to the trough.

In a preferred embodiment, the insert is elastically buffered on the trough. This prevents that to be treated good between trough and use sets and affects the mobility of the insert.

In a preferred embodiment, the insert is spring-loaded against the trough. As spring is a helical compression spring made of spring steel into consideration. Also preserved is a gas spring, which should preferably be adjustable in their spring characteristic.

For articulated, adjustable inserts, there is an extensive state of the art in impact mills (see DE 23 00 715 AI, DE 30 18 056 AI, DE 40 37 036 AI, FR 26 72 515 AI, US 40 17 035 A, US 41 40,284 A, US 4,506,837 A and others). The missions are nothing more than baffles. Impact mills have a shaft that is fitted with striking tools. The Forderweg of the material to be crushed is directed from top to bottom across the shaft. On the other hand, in the device according to the invention, the material to be treated is transported in the longitudinal direction of a shaft fitted with wedging tools. The inventions provided inserts serve to build up pressure on the good by wedging action. For the state of the art of impact mills is not relevant. In a preferred embodiment, the insert has an active surface, which is curved in the circumferential direction of the shaft or extending tangentially or polygonal thereto.

In a preferred embodiment, the active surface runs in the direction of rotation of the shaft to the wedging tools, so that narrows the wedge gap. This is particularly recommended on the last degrees of centrifuge lengthened by the insert, over which an upward movement of wedging tools with strong wedging action occurs.

In a preferred embodiment, the active surface of the insert is structured in the manner to be treated holding manner. This promotes the shuffling of the insert and counteracts the wear. The active surface may in particular be provided with parallel grooves which extend in the longitudinal direction of the shaft. Preferably, the grooves have a U-profile.

In a preferred embodiment, the insert is provided with at least one of the active surface reinforcing insert made of ceramic or hard metal.

In a preferred embodiment, the trough is provided at the constriction with identical or non-identical Schleißsätzen. The latter are supported for force introduction in the direction of rotation in front form fit to the trough or insert.

The invention is explained below with reference to exemplary embodiments illustrated in the drawing. Shown are schematic side views of dissolving plants with a trough and a shaft running therein, which is equipped with wedging tools. The view is in the wavelength direction, d. H. directed in the transport direction of the material to be treated.

All of the disintegrators shown in the drawing have a tray with a bottom 10 and vertical side walls 12. In Figs. 1, 2 and Fig. 5 to Fig. 8, the bottom 10 is semi-cylindrical, rectangular in Fig. 3 and prismatic in Fig. 4.

In the cylinder axis of the trough a shaft 14 is arranged, which is equipped with wedge tools 16. With regard to their attachment and design can be made to EP 0 712 665 AI and DE 202 18 917.1 Ul reference.

The dissolver systems serve to rid granular mineral material from adhering soft components. To do this, the systems usually run wet. The trough is flowed through in countercurrent with the material to be treated by water. However, the use of water for washing the Guts is not mandatory for the invention. There are special cases in which dissolution plants run better dry.

In the dissolution equipment shown in the drawing, various measures are taken to narrow the gap between the one vertical side wall 12 of the trough and the shaft 14 with the wedging tools 16, where the tools 16 make their upward rotation. The constriction is usually located directly above the central axis of the shaft 14. In one or the other case (see Fig. 7 and Fig. 8), however, it already begins slightly below.

To narrow the gap, the trough is provided with inserts in the illustrated embodiments. That creates flexibility. You can work with or without use as needed. Mind you there is also the possibility to retract the side wall 12 of the trough and thereby achieve the desired gap narrowing.

The trough of the dissolver plants in operation to a thickness thick, which is indicated by the line 18. It forms on the ground and over large parts of the trough circumference a tank of material to be treated, which adheres to the trough. The mixing is desired. It counteracts the wear.

On the vertical side walls 12 of the trough above the central axis of the shaft 14 is usually no significant Zuschamottieren too observe. The estate is pushed upwards. Tank formation is prevented by gravity, the friction of the goods transported through the trough and possibly the flow of water.

The invention aims to extend the zuschamottierende Umfangspar- tie the trough in the upward direction of rotation of the seated on the shaft 14 wedge tools 16, thereby improving the dissolving effect. For this purpose, internals are suitable, which take the place of the non-forming from home tank, or zuschamott in part or completely in the desired manner.

In the embodiment of FIG. 1, a wedge-shaped insert 20 is rigidly attached to the vertical side wall 12 of the trough, at which the upward rotation of the shaft 14 with the wedging tools 16 takes place. The base 22 of the wedge is located at the height of the shaft axis. The flat inclined surface (active surface) 26 of the wedge narrows the gap between the trough wall 12 and shaft 14 above the shaft axis. The wedge fires over approximately half the length of the active surface 26, in the thickness of the tank, which forms in the bottom region of the trough.

In the embodiment according to FIG. 2, in an equally rigidly mounted wedge, its active surface 26 is curved in extension of the trough bottom. The active surface 26 chamfers over the full length, without the need for a special structuring.

In the embodiment according to FIG. 3, a wedge-shaped insert 20 similar to that of FIG. 1 is designed as a housing with chambers 28 open toward the shaft. The planar partitions 30 between the chambers 28 are directed substantially radially to the shaft 14. By this configuration, the Beschamottieren the insert 20 is promoted.

In the embodiment of FIG. 4, an insert 20 at the level of the central axis of the shaft is pivotally mounted on the trough wall 12. The pivot axis 32 is directed parallel to the shaft 14. The surface of the insert 20 according to FIG. 4 is simply stepped polygonal, so that two flat oblique surfaces (active surfaces) 26 are formed with a substantially tangential inclination to the shaft 14. Between the insert 20 and the wall 12 of the trough an elastic pad 34 made of rubber or a gum iähnlichen material is arranged. The pad 34 serves for elastic buffering. It prevents that the material to be treated settles between the insert and the trough wall and impairs the joint mobility of the insert.

In the embodiment according to FIG. 5, a hinged insert 20 is buffered against the trough wall 12 in addition to the elastic pad 34 with a helical compression spring mounted above it. The active surface 26 of the insert 20 is curved coaxially with the shaft 14 in the circumferential direction. It has at the height of the shaft axis a distance from the trough wall 12, which corresponds approximately to the thickness of the tank, which forms below the insert 20 by Beschamottieren. In the active surface 26 U-shaped grooves 38 are provided, which enforce in operation with good.

According to FIG. 6, in an insert 20 whose design otherwise corresponds to that of FIG. 5, inserts 40 made of ceramic or hard metal are provided in the grooves 38, which completely fill the grooves 38.

In the embodiments according to FIG. 7 and FIG. 8, the insert 20 is graduated in a double polygonal manner, so that three flat oblique surfaces (active surfaces) 26 are formed with a substantially tangential inclination to the shaft 14. The inserts 20 are hinged below the shaft axis on the trough wall 12 and buffered with an elastic pad 34 and a gas spring 42 mounted above it against the trough wall 12. The gas spring 42 is adjustable in its spring characteristic.

In Fig. 8, the inclined active surfaces 26 of the insert 20 are formed by three identical Schleißsätzen 44, which are provided with grooves 38. The wear sets 44 are positively supported in the direction of rotation at the front of lugs 46 of the insert 20. List of reference numbers

ground

Side wall

wave

Tool

line

commitment

nadir

effective area

chamber

partition wall

articulation axis

pad

Helical compression spring

groove

inlay

gas spring

Schleißsatz

nose

Claims

Expectations

1. Dissolving plant for granular material, in particular for minerals with soft components such as clay and / or clay, bulbous mineral conglomerates or the like, with a trough which has an inlet and an outlet for the material, and with one in the longitudinal axis of the trough arranged, in rotation driven shaft with wedging tools thereon, the material to be cleaned being able to be conveyed through the trough between inlet and outlet, characterized in that the trough on the tool-rising side above the central axis of the shaft (14) away from the vertical is narrowed upwards and inwards.

2. Dissolving plant according to claim 1, characterized in that the trough is retracted.

3. Dissolving plant according to claim 1 or 2, characterized in that the trough is narrowed therein by an insert (20).

4. Dissolving plant according to claim 3, characterized in that the insert (20) is rigid.

5. Dissolving plant according to claim 3, characterized in that the insert (20) is movable.

6. Dissolving plant according to claim 5, characterized in that the insert (20) is articulated on the trough.

7. Dissolving system according to claim 5 or 6, characterized in that the insert (20) is elastically buffered on the trough.

8. Dissolving system according to one of claims 5 to 7, characterized in that the insert (20) is spring-loaded against the trough, preferably with a gas spring (42) adjustable in its spring characteristic.

9. Dissolving system according to one of claims 3 to 8, characterized in that the insert (20) has an active surface (26) which is curved in the circumferential direction of the shaft (14) or extends substantially tangentially or polygonally thereto.

10. resolution system according to claim 9, characterized in that the active surface (26) in the direction of rotation of the shaft (14) tapers to the wedging tools (16).

11. Dissolving system according to claim 9 or 10, characterized in that the active surface (26) of the insert (20) is structured in a manner to hold the material to be cleaned.

12. resolution system according to claim 11, characterized in that the active surface (26) of the insert (20) is provided with parallel grooves (38) which extend in the longitudinal direction of the shaft (14).

13. resolution system according to claim 12, characterized in that the grooves (38) have a U-profile.

14. Dissolving system according to one of claims 9 to 13, characterized in that the insert (20) is provided with at least one insert (40) reinforcing the active surface (26) made of ceramic or hard metal.

15. Dissolving system according to one of claims 1 to 14, characterized in that the trough at the constriction is provided with identical or identical wear sets (44).

16. Dissolving system according to claim 15, characterized in that the wear sets (44) in the direction of rotation at the front are positively supported on the trough or insert (20).