CS209422B2 - Device for transport of the filling waste rock - Google Patents

Abstract

1506416 Conveying solids in liquids RUHRKOHLE AG 31 Oct 1975 [19 Dec 1974] 45564/75 Heading F1R Solid material from a conveyer 1 falls down a pipe 3 into a chamber 4 containing still liquid and is withdrawn at the lower end by water flowing from a reservoir 5 and conveyed to a separating chamber 9, liquid passing to a sump 13 from which it is returned to the reservoir 5 while the solid material passes to a conveyer 15.

Description

(54) Equipment for transporting the tailings tailings

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for conveying a tailings tailings, in particular with a surface into a surface below the surface by means of a water jet.

It is known to provide a float landfill in which the landfill tailings are mixed with water on the surface and run through a downcomer. The tailings sludge is hydraulically floated to the face where it is set up similarly to the blown pile. The water is collected in the recovery tank, cleaned and pumped back for reuse.

A significant disadvantage of the known device is that it circulates a large amount of water which has to be costly separated from the tailings.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a tailings conveying device which, using gravity and a hydraulic conveying system, transports tailings in a surface pipeline up to the immediate proximity of the flange and which requires only a relatively small amount of water.

SUMMARY OF THE INVENTION The problem is solved by providing a device for conveying the tailings tailings, in particular with the surface to be coiled below the surface by means of a water jet, which according to the invention differs from the known devices. at rest and a horizontal part consisting of a mixing tube and a tailings conveyor line, at the end of the tailings conveyor line there is a cyclone separator with a tailings conveyor downstream of the tailings outlet of the cyclone plant, as well as as a water purification tank with a return water line, the water in the submerge being communicatively connected to the water tank supply line, and in the mixing tube a propulsion water supply is provided at a rate corresponding to the rate of fall of the tailings in the submerge.

If there is sufficient space to build a large purification tank, it is advantageous according to the invention to connect the water return line directly to the supply line, the water purification tank being sized to accommodate all the circulating water.

For fully automated operation, the device according to the invention is provided with two control circuits, one for switching on and off the conveyor belt for tailings and the other for controlling the water circulation.

The advantage of the tailings conveying device provided according to the invention is the low water demand and hence economical operation, which is fully automated.

An exemplary embodiment of a conveying device i

The foundation gangue formed according to the invention is shown in the drawings, in which Fig. 1 shows a diagram of the conveying device in a side view, and Fig. 2 shows a diagram of a mixing pipe.

The 10 mm to 50 mm sorted tailings fraction is conveyed by a conveyor belt 1 via a belt weigher 2 to the tailings dump 3 in a predetermined quantity per time unit. The tailings inserted by the funnel opening of the downcomer 3 falls to the water level in the submerged tubing.

4. At the top of the dip pipe 4, the tailings particles are inhibited and their velocity is reduced to the rate of descent νθ to water.

Since the water in the immersion line 4 is connected to the water tank by the inlet line 6

5, the tailings falling down in still water enter the mixing tube 7, behind which the tailings conveying line 8 is arranged. Since no shut-off member is inserted in the conveying line 8, water flows from the water tank 5 up to the cyclone device 9, which entrains the tailings particles freely attacked in the mixing tube 7.

The manometric height is determined according to the length of the conveying line 8 so that the sludge reaches the speed required for horizontal transport, this water speed causing water separation in the cyclone device 9, which does not have its own propulsion unit. The discarded tailings are conveyed by the conveyor 15 to the destination. The separated water from the drain pipe 11 is collected in the purification tank 13, from which it is pumped back to the water tank 5.

The control is fully automatic. Upon actuation, the second control circuit II actuates the water circulation. After a feedback check

Claims (3)

SUBJECT A device for conveying a tailings tailings, in particular with a surface to the surface below the surface, by pipelines by means of a water jet, characterized in that it comprises a vertical part consisting of a tailings dump (3) and tailings ducts (4) with water located at rest and horizontal. part comprising a mixing tube (7) and a tailings conveyor line (8), a cyclone (9) for separating water with a tailings conveyor (15) located at the end of the tailings conveyor line (8) a tailings outlet (10) from the cyclone device (9), as well as a water purification tank (13) with a return water line (14), wherein the water in the submerged line (4) is communicating with the first control circuit, 1 conveyor belt 1. When commanded to shut down, first circuit I first shuts off conveyor belt 1. After a preset period of time during which the entire system is devoid of tailings, the second control circuit II stops the water circulation. In the event of failure of the conveyor 15, an emergency stop is performed in which the conveyed tailings are discharged to the tank cleaner. Where there is sufficient space to accommodate a large purification tank, or if the location of the water tank for the water supply line would be unfavorable, the water tank 5 may be omitted so that the return line 14 is directly connected to the inlet line 6. Then, the purification tank 13 must be sized to accommodate all circulating water. The device according to the invention works reliably when conveying sludge consisting of six parts by weight of water per part by weight of the tailings tailings at a speed of 6 m / s. Pipes with a nominal diameter of 200 mm transport 250 tonnes of tailings tailings per hour. It is important that the proportion of the tailings tailings in the sludge never exceeds a 1: 6 ratio, which applies to tailings with a mean descent rate of 0.8 m / s in still water. The velocity of the inflow of water in the mixing tube 7 must be approximately the same as the average fall speed of the tailings, i.e. usually 0.8 m / s, so that the tailings descend at an angle of 45 °, thereby avoiding tailings. The constriction in the mixing tube 7 must be calculated according to the acceleration and the rate of the tailings descent in order to achieve a perfectly smooth entrainment of the conveyed material into the horizontal conveying pipe 8 by increasing the flow velocity. Inventionly connected by a supply line (6) to a water tank (5) and in the mixing tube (7) a supply of propellant with a speed equal to the rate of fall of the tailings in the immersion line (4) is provided. Device according to Claim 1, characterized in that the return line (14) is directly connected to the supply line (6), the water treatment tank (13) being sized to accommodate all the circulating water. Device according to Claims 1 and 2, characterized in that the horizontal part is connected to a second control circuit (II) for controlling the water circulation, the first control circuit (I) being intended to switch on and off the conveyor belt (1) for the tailings charge. .