CS215475B1

CS215475B1 - Screw sorting for fine sorting

Info

Publication number: CS215475B1
Application number: CS10781A
Authority: CS
Inventors: Vojtech Cisko; Vojtech Bena; Peter Piroch
Original assignee: Vojtech Cisko; Vojtech Bena; Peter Piroch
Priority date: 1981-01-06
Filing date: 1981-01-06
Publication date: 1982-08-27

Abstract

Vynález sa týká hydraulického triederiia a odvodňovania. Vynález rieši jemné triedenie minerálnych suspenzií, priemyselných kalov, odvodňo- , vanie pieskov a zrnitých materiálov. Podstata vynálezu spočívá v tom, že přepad skrutkového triediča je tvořený paralelnými šikmými lamelami o úklone 30° až 75°, výhodné 55° od horizontálnej roviny, ktoré smerujú k dopravnej skrutke, pričom horná krycia lamela prečnieva úroveň prepadovej hrany. Vynález je využitelný hlavně pri úpravě úžitkoi vých nerastov, dalej v chemickom, hutníckom a potravinárskom priemysle.The invention relates to hydraulic sorting and dewatering. The invention solves the fine sorting of mineral suspensions, industrial sludges, dewatering of sands and granular materials. The essence of the invention lies in the fact that the overflow of the screw sorter is formed by parallel inclined lamellas with an inclination of 30° to 75°, preferably 55° from the horizontal plane, which are directed towards the conveyor screw, while the upper cover lamella protrudes above the level of the overflow edge. The invention is useful mainly in the treatment of useful minerals, further in the chemical, metallurgical and food industries.

Description

Vynález sa týká hydraulického triedema a odvodňovania. Vynález rieši jemné triedenie minerálnych suspenzií, priemyselných kalov, odvodňo. vanie pieskov a zrnitých materiálov.The invention relates to a hydraulic class and dewatering. The invention solves the fine sorting of mineral suspensions, industrial sludge, dewatering. sand and granular materials.

Podstata vynálezu spočívá v tom, že přepad skrutkového triediča je tvořený paralelnými šikmými lamelami o úklone 30° až 75°, výhodné 55° od horizontálnej roviny, ktoré smerujú k dopravnej skrutke, pričom horná krycia lamela prečnieva úroveň prepadovej hrany.The essence of the invention is that the overflow of the screw sorter is formed by parallel inclined lamellas with a slope of 30 ° to 75 °, preferably 55 ° from the horizontal plane, which face the conveyor screw, the top cover lamella extending over the level of the overflow edge.

Vynález je využitelný hlavně pri úpravě úžitkoi vých nerastov, dalej v chemickom, hutníckom a potravinárskom priemysle. 215475 3The invention is applicable mainly to the treatment of useful minerals, further in the chemical, metallurgical and food industries. 215475 3

Vynález sa týká skrutkového triediča pre jemné triedenie minerálnych suspenzií a priemyselných i kalov, ako aj na odvodňovanie pieskov a zrnitých materiálov.BACKGROUND OF THE INVENTION The present invention relates to a screw sorter for fine sorting of mineral suspensions and industrial and sludge as well as for dewatering sands and granular materials.

DoposiaT známe skrutkové triediče používané na mokré triedenie mletého produktu mlynov, ako aj na odvodňovanie produktov mokrej úpravy, pracujú s vysokou hranicou triedenia. U týchto triedičov minerálně zrná verkosti 0,2 až 0,8 mm ešte v hojnom počte prechádzajú do přepadu. Skrutkové triediče spriahnuté s mlynom na flotačných Úpravniach úžitkových minerálov dávajú váčší podiel nedostatočne otvoreného zrna alebo nadflotačného zrna, zvyšujúc takto úpravnícke straty. U týchto skrutkových triedičov používaných na odvodňovanie, velké medzné zrno triedenia zna- mená aj velké straty odvodňovaného materiálu do přepadu triediča. U doposiar známých skrutkových triedičov užšia škála zrnitosti přepadu sa dosahuje lřb použitím dvojstupňového triedenia, čo znamená výššie investičně a prevádzkové náklady, váčší stavebný priestor, vyššie nároky«na údržbu a spotřebu energie.To date, the known screw sorters used for wet sorting of ground mill products as well as for wet treatment products work with a high grading threshold. In these classifiers, mineral grains of 0.2 to 0.8 mm in size pass into the overflow. Screw sorters coupled with a mill for flotation processing minerals give a higher proportion of inadequate grain or overflotation grain, increasing the processing losses. With these screw sorters used for dewatering, large screening grain also means large losses of drainage material to the overflow of the sorter. In the previously known screw sorters, a narrower range of overflow granularity is achieved by using a two-stage sorting, which means higher investment and operating costs, greater building space, higher maintenance and energy consumption.

Uvedené nedostatky doposial’ známých skrutkových triedičov odstraňuje skrutkový triediě podía tohoto vynálezu, tvořený vaňou skrutkového triediča a dopravnou skrutkou, podstata ktorého spočívá v tom, že přepad vane triediča je vytvořený paralelnými šikmými lamelami o úklone 30° až 75° výhodné 55° od vodorovnej roviny so smerom úklonu k dopravnej skrutke. Horná krycia lamela přitom přesahuje úroveň prepadovej hrany vane triediča.The aforementioned drawbacks of the prior art screw sorters are eliminated by the screw sorting according to the present invention, consisting of a screw sorter pan and a transport screw, characterized in that the sorter overflow is formed by parallel inclined lamellae of 30 ° to 75 ° advantageous 55 ° from the horizontal with a bow towards the transport screw. In doing so, the upper cover plate exceeds the level of the overflow edge of the classifier bath.

Vytvořením přepadu skrutkového triediča paralelnými šikmými lamelami podTa tohoto vynálezu sa docieli účinné vysedimentovanie vačších zrn rmutu na šikmé lamely, po ktorých skíznu spáť doBy providing an overflow of the screw sorter with parallel oblique lamellae of the present invention, an efficient sedimentation of the larger grains of the mash is achieved on the sloping lamellae upon which to slip into the

Claims

SUBJECT

L -......... = ,,,. .............

A screw sorter for fine sorting of mineral suspensions and industrial sludge, as well as for dewatering sands and granular minerals consisting of a screw sorter tub and a conveyor screw, characterized in that the overflow of the screw pan215475 reaches the conveyor screw through which it is removed from the screw sorter tub. This results in a lower and sharper sorting threshold and a finer overflow than with the known screw sorters. The screw sorter according to the invention coupled with a mill ensures a better grain opening for subsequent flotation treatment, whereby a higher yield of useful mineral is achieved and, when used for dewatering, works with lower losses of drained material to the overflow. It will ensure lower grading thresholds in one step, which means savings on investment and operating costs and energy consumption.

In the accompanying drawings, three embodiments of a screw sorter according to the invention are shown, in which FIG. 1 is a front-end screw sorter in an axenometric view, FIG.

2 shows a screw separator with side overflows also in axonometric representation, and FIG. 3 shows a screw classifier with front and side overflows also in axonometric representation.

The overflow tray of the screw sorter 1 is formed by parallel oblique slats 3 directed towards the transport screw 2, the upper covering slat 4 protruding above the level of the overflow edge 5, creating the necessary pressure drop for the upward flow of the mash between the slats. led to the transport screw 2.

The screw sorter according to the present invention is useful for dewatering wet mineral products, for closed-circuit sorting of minerals in flotation plants and wherever it is necessary to sharpen mainly mineral suspensions on a narrow scale.

BACKGROUND OF THE INVENTION The sorter (1) is formed by parallel oblique slats (3) with a task of 30 ° to 75 ° preferably 55 ° from the horizontal plane facing the transport screw (2), the upper covering slat (4) overhanging the level of the overflow edge. 5).