DE728923C - Process for processing several heavy fluids with suspended matter at different settling speeds - Google Patents

Description

Process for the processing of several heavy liquids with suspended matter different settling speeds The invention relates to a method by two or more heavy liquids, which consist of suspended matter at different settling speeds exist to work up.

If you have granular goods of various kinds of spruce by means of heavy fluid conduction If you want to divide into more than two parts, you can -the sunken or the floating one Product of one heavy fluid in another heavy fluid higher or lower specific gravity. In this connection it is noted that one practically always use water as the liquid part of the heavy liquid and that the solid fraction (suspended matter) from every insoluble in this liquid, can consist of relatively fine-grained material, e.g. B. from sea or river sand. Iron oxide, barite, ferrosilicon, galena, etc.

For the sake of this separation one becomes for the heavy fluid with the lower specific gravity preferably suspended matter with relatively smaller and for the shear liquid with a greater specific gravity, those with a greater settling rate especially if one intentionally uses unstable heavy fluid, d. H. those whose weight increases quite sharply from top to bottom. You wanted to in the lighter heavy fluids sweat with greater settling speed use, it would hardly be possible to prevent the weight of the heavy fluid from falling below in the bath would become too big for the intended purpose. the use this suspended matter for the purpose in question is therefore to be avoided. One would on the other hand, you need a very large thickener if you have a suspended matter with a relatively low settling speed also for the production of the heavier ones Wanted to use heavy fluid. In view of this, one will go for the heavier one Heavy liquid preferably use a suspended matter that is a proportionate has a high weaning speed.

But even when using homogeneous heavy fluid, you will, if also partly for other reasons, for the lighter and for the heavier heavy fluid Suspended matter of relatively low or relatively high settling speed draw in. In this case, the use of suspended matter would with some extent Considerable sedimentation speed in the lighter heavy fluid a strong one Require stirring action, which is by no means compatible with a good divorce.

The sedimentation speed of the suspended matter depends on both the grain size as if dependent on its weight. Because it's always seen as a disadvantage would be different for the two (or more) heavy liquids of different densities To use suspended matter, as each heavy liquid then has a special treatment device and the divorce facility would therefore be involved and costly one and the same starting material for the heavy and for the lighter one is preferred Heavy fluid with the imposition that the finer parts in the lighter, the coarser ones are processed in the heavier heavy fluid.

For the floating and sinking separation of hard coal with only one heavy liquid it is known to shower off all products for the purpose of recovering suspended matter, to collect the shower water of all products and this after separating out impurities to pass into a thickener, from which the suspended solids after preparation of the required Weight can be returned to the heavy fluid cycle.

The invention now relates to a useful and simple method for processing z-on two or more heavy liquids of different densities, which are formed from suspended matter with different settling speeds, for the floating and sinking separation of lumpy goods, especially coal, with the separating products for the purpose of @@ 'iederge "-ginning the suspended matter off" -erden, and is thereby characterized in that the effervescent water of all products is collected that is in it suspended matter contained in as many proportions of different settling speeds how heavy liquids are present! is divided up by means of a thickener and the divided Sch "vebestoffe each for itself with water to heavy liquids of the necessary Weights are mixed.

For the purpose of explanation, in the following with reference to the schematic "drawing of a coal washing machine with a device for processing of the suspended matter according to the invention are described by way of example.

The raw coal is introduced from a container t into a washing container 2, which contains an unstable heavy liquid of fine suspended matter in water. The specific gravity of this heavy liquid is kept at 1.30 at the mirror and at 1.45 at the bottom. The washing container is traversed by heavy liquid streams at different heights, which drive the individual products to the discharge devices. The very pure, floating coal with a specific weight of at most 1.30 is carried away from the mirror and rinsed off on a sieve 3 with fresh water. The floating, less pure coal with a density of 430 to 1.45 arrives at a sieve 4, the front part of which is only used to drain the heavy liquid carried along into a funnel 4 "below. On the rear part of this sieve the suspended matter still adhering to the coal is sprayed off. The goods that have sunk to the ground (medium-sized goods and mountains) are fed from your container 2 to a sieve 5, under which there is a funnel 5 ″. The material is sprayed off on this sieve, whereupon it is entered into a washing container 6 which contains an inconsistent heavy liquid of coarser suspended matter in water. The weight of this heavy liquid is kept at 1.9o on the mirror. The medium material floating in this heavy liquid (with a specific weight of 1.45 to 1.9o) reaches a sieve 7, where it is sprayed off, while the remainder consisting of mountains and the floating medium material with a specific weight of more than 1.9 ° reaches a sieve 8 is fed. the front part of which conducts the heavy liquid running off into a funnel 8 located underneath, and the suspended matter adhering to the material is sprayed off on the rear part of the funnel.

The shower water containing the suspended matter from all sieves 3, .I, 5, 7 and 8 come to a common sieve 9, the the holds back coarser impurities from it. After that it flows into a proportionately small thickener io, in which the coarser suspended matter quickly settles, while the finer one dissolves with the overflow water in a larger thickener ii.

The heavy liquid is withdrawn from the thickener io through a bottom valve and a pump 12 and pressed into a container IX, from which it, as long as it has not yet reached the density required for the washing container 6, through the lines 25, 3o or 29 , 30 is returned to the lower part of the thickener. Otherwise, they are allowed to flow from the container 13 into a reservoir 14 which feeds the washing container 6 by means of a pump 15. But if the heavy liquid in the reservoir 14 has reached a certain liquid level, the container 13 can be emptied again into the lower part of the egg thickener.

The heavy liquid in the thickener i i is through a bottom valve and a pump 16 is pushed into a container 17. Has the raised Sohwere fluid has not yet reached the weight required for the washing container 2, it will returned through the lines 26, 32 and 31, 32 in the lower part of the thickener i i. As soon as their weight has reached the desired value, they are let out of the container 17 flow into a memory 18 which feeds the washing container 2 by a pump i9. If, however, the liquid level in the container 18 has reached a certain level, it can be man 'the container 17 is again in the lower part of the thickener io for the suspended matter Empty at the higher setting speed.

The overflow water from the thickener i i reaches a container 2o, from which it is fed by a pump 21 to a line 22 to which the various Shower lines are connected. In addition, one can still use line 22 Allow water into thickeners io and ii to prevent the sedimentation if necessary to regulate in these apparatuses. The overflow water from the container 2o becomes itself removed from the circuit.

To compensate for the inevitable losses, one can, through the line, which connects the sieve 9 with the thickener io, fresh suspended matter into the circuit bring in.

In the above it is assumed, for the sake of simplicity, that the discharge of heavy liquids from the container 13 either into the thickener io or the memory 14 and the discharge from the container 17 either in the thickener i i or the memory 18 or the thickener io done by hand, namely on Based on determinations of the weight of the heavy fluid and observations of the fluid levels in the stores. But it is clear that this can also be done by devices by means of which the specific gravity of heavy liquids is automatically and continuously let take care of it.

In a device serving this purpose is a measuring vessel that forms the load pan of a balance, with the help of which the heavy liquid is measured continuously. Several inflow pipes for liquids of different weights are so connected to a control device controlled by the balance that so much liquid is always added to lighter or heavier weights that the weight of the heavy liquid flowing off through the lines 33 or 3.4 remains constant is kept at the desired height. The drawing shows the container below 13, 17 each have such a device 27, 28 shown schematically. These control devices are for the present purpose with a float valve 23 or 2q. Mistake, thus when a certain liquid level is reached in the reservoir 14 or 18 the feeding of heavy liquid into the corresponding storage is completed and the heavy liquid is fed to the thickener io. When using such The lines 25, 26 are missing control devices.

The above example assumes that the various -, #, bsetzgesch-, v suspended matter is caused by different grain sizes. One can of course, use suspended solids with the same effect, which are approximately the same Grain size, but different specific gravity, so that the coarser suspended matter of the Embodiment of the suspended matter of higher density and the finer suspended matter the suspended solids correspond to lower specific gravity.

If the above refers to a washing container or a thickener is taken, of course, a group is also connected in parallel Wash container or thickener meant.

Claims (1)

PATENT CLAIMS: i. Process for processing several heavy liquids with suspended matter at different settling speeds for floating and sinking separation lumpy goods, especially coal, whereby the vaginal products are blown off, characterized in that the shower water collected from all products, the suspended matter contained therein in as many proportions of different settling speeds how Heavy liquids present are divided up by means of a thickener becomes and the divided suspended solids each separately with water to heavy liquid the required weight are mixed. Method according to claim i. characterized, that, the excess amounts of the processed heavy liquids in each case Thickener to extract the suspended matter with the next higher sedimentation speed "- earth with the exception of the excess of heavy liquid with suspended matter maximum settling speed, which is fed back into the thickener for its recovery will.