DE800009C - Heavy fluid separation - Google Patents

Description

of the German Poferriama

GERMAN PATENT OFFICE

PATENT LETTERING

CLASSIC GROUP 1oi

p 8770 VIbIic D

Otuj. Friedrich Wilhelm Mayer in Herne-Sodingen has been named as the inventor

Westfalia Dinnendahl Gröppel Akt.-Ges. in Bochum

and £ ΐ. * 3η $. Friedrich Wilhelm Mayer in Herne-Sodingen

Heavy fluid separation

Patented in the territory of the Federal Republic of Germany from October 2, 1948 Patent issued July 27, 1950

The invention relates to a method for

Separation of fine-grained mixtures according to specific gravity by swimming and sinking in a heavy liquid, especially for processing fine-grained coals and ores.

In such separation or treatment processes, a heavy liquid, its density is between that of the lightest and that of the heaviest grain. The heavy liquid can be a stable solution or an unstable suspension of a weighting substance in a liquid, usually water, be. There are already a number of such processing methods known. However, these known methods are primarily only suitable for coarser grain classes. For fine-grained mixtures fail.

In terms of process engineering, the difficulties in the preparation of fine-grained mixtures lie with Help from heavy liquids in the low sink or Rate of rise of the granules in the Heavy liquid. The consequence of this is that

a) the separation process takes a much longer time than with coarser mixtures,

b) any movement of the heavy liquid during and after the separation process a disturbance of the same causes the descending or ascending granules to follow the fluid eddies easily and thereby being mixed again.

It can therefore also the usual discharge process, such as. B. Wiping off the swimming pool With the help of dip belts, skimming, washing over the edge of the vessel, discharge through bucket elevators etc., are not used, because in all of these processes the heavy fluid is so strongly swirled through becomes that undesired mixing occurs again.

The invention is intended to eliminate the disadvantages of the known methods and to create a method that the gap in the processing technology with regard to the separation of fine-grained Mixing by means of a heavy liquid closes. The invention is that the to be separated Mixture together with the heavy liquid in one

Claims (6)

Relatively low separating cell abandoned, left there for some time in absolute rest and then the entire contents of the cell are drained downwards without vortices, the sinking material and the floating material being carried away separately from one another. At Zekhnuing, for example, a tin plant implementing the new process is shown. The system consists of two rows of separating cells i, which are arranged on the right and left of a feed hopper 7. The bottoms of each of these 5s separating cells consist of a number of pointed boxes 2 each with an outlet nozzle 4 which can be closed by a valve body 3 and whose diameter is in a certain ratio to the distance between the nozzle opening and the liquid level inside the separating cell. All valves 3 of a cell are operated simultaneously by a common control device. The collecting troughs 5 are arranged below the outlet nozzles 4 and are divided by partition walls into separate troughs for discharging the sinking and floating material, possibly also an intermediate material. The collecting chutes 5 are attached to a common frame 5 ″ which can be displaced below the separating cell 1. Above the separating cells 1 there is the loading system, which essentially consists of the mobile conveyor belt 6, the bunker 7 and the one pivotable around the pins 8 On both sides of the dosing line are the feed channels 10 for the heavy liquid, which are connected through bottom valves 11 to the feed line 12 for filling the cells 1. The system works in the following way: The mixture coming from the distributor belt 6 is as follows first enters the bunker 7. From here the metering pipe 9 is filled with the mixture to be separated when it is in the middle position below the bunker the pockets 13 · The bunker opening is closed in the two pivoted-out positions, the amount necessary to fill the cell Heavy liquid flows from the channel 10 through the valve n into the supply line 12 and in this way takes the material from the pocket 13 with it into the separating cell 1. Here, a short time after filling, the heavy liquid comes to rest, so that the Separation into floating and sinking material can proceed without interference. After the separation is complete, the entire cell contents are drained free of eddies, whereby first the sinking material lying on the cell floor and then the floating material floating below the surface of the heavy liquid is rinsed out together with the heavy liquid. By simply shifting the frame 50 laterally during lowering, the sediment is diverted into the channel 5 * and the floating material into the channel 5C. From here, the two separation products with the heavy liquid flow pass separately through the corresponding channels of the main collecting channel 14 to the scalding and spray sieves. After the cell has been emptied, the bottom valves are closed and the process described above begins again. The heavy liquid separated from the sediment and floating material on the scalding sieves is pumped back into the channels. The processes can be controlled in a known manner by camshafts, contact disks, floats or the like, and the control pulses can be transmitted mechanically, pneumatically, hydraulically or electrically. Several rows of separating cells can be arranged one above the other to increase the green area performance. · The new process is particularly suitable for the production of precious coal from fine coal. Likewise, the separation of ores, rare earths, semi-finished or finished products of the chemical or ceramic industry can also be carried out in this way with equally good success. PA T E N T A N S l> R C C H E: 1. A method for separating fine-grained mixtures by swimming and sinking in a heavy liquid, in particular for processing fine-grain coals and ores, characterized in that the mixture to be separated together with the heavy liquid is given up in a relatively low separation cell, there for some time in absolute terms Leave it to rest and then the total content of the cell racrr below swirls frci "vfagetNMB " wi «4« »in the case of the sinking material vmu the floating device must be carried away separately from each other. uo 2. Apparatus for carrying out the method according to claim I ₁ characterized by a flat, preferably rectangular or square separating cell with a bottom consisting of a number of pointed boxes arranged next to one another, the nozzle-like outlet openings of which are controlled by a valve each. 3. Device according to claims 1 and 2, characterized in that all valves ir> o of a cell can be operated by a common control device. 4. Device according to claims 1 to 3, characterized in that each row of Outlet valves are assigned a hem gutter divided by a partition .is and aHie Collecting channels of a cell are mounted on a sliding frame. 5. Device according to claims 1 to 4, characterized in that between the task bumker and every two separation cells one swiveling metering duct is switched on for the mixture to be separated. 6. Device according to claims 1 to 5, characterized in that several separating ms cells are arranged next to or on top of one another. For this purpose ι sheet of drawings