DE727105C - Process and washing trough for separating the finest good parts from fine-grained processing material - Google Patents

Description

Process and washing trough for separating the finest good parts from fine-grained ones Material to be processed The invention relates to a method for separating the finest good parts from fine-grain processing material, e.g. B. Coal, in chin washes.

In the previously known channel washers, the washing water runs through the processing channels in their entire length. The fine particles floating in the water can therefore only after the treatment agent has passed through completely into the sludge ponds or the like. Be directed and recovered. A division into ashes poor and ash rich This means that sludge is not possible.

According to another known method, the entire material to be processed should before the task in the washing apparatus on refining devices, z. B. Lauter Drums, are performed, in which the water-soluble and suspendable substances in .the liquid .goes. The separation of the coal so desludged from the finest Liquid containing good particles should then be passed on to suitable sieves take place, if necessary with simultaneous showering of the goods. Since the path that the material to be processed must traverse is greater, a must increased abrasion must be accepted. A separation of the finest parts in Ash-rich and ash-poor sludge is also not possible with this process.

The method on which the invention is based avoids these disadvantages now by the fact that the Feinstgutteile eliminated during the wet mechanical processing separately according to their nature. The ash richest sludge can .by suitable means switched into the preparation channel at the top At the end, the ash poorest sludge is discharged at the lower end of the washing trough. For this purpose, the wash water according to the invention should be wholly or partially from the Gutter wash removed and setting devices, z. B. pointed boxes, are supplied, in which the items contained in the laundry have a certain minimum grain size fine-grained Can settle well, while the water then only carries the finest good particles at the overflow of the jigs and optionally, depending on the ash content its solids, either the sewage sumps for low-ash or high-ash sludge is fed. The fine-grained goods deposited in the pointed boxes can also optionally be given up where it belongs according to its nature, that is for example in the downstream washing trough or directly if the ash content is too high in, the recovery discharge.

This process is more economical than the aforementioned processing process; n, but especially those in which the fine in the raw material, z. B. is less than 0.15 mm grain size, not at all or only in an imperfect way for certain types of goods.

When the resulting end product is used for a specific purpose should, you often only want a part of the fine material to increase the yield and economy.

According to the invention this can be done in that in the gutter washing Means are switched on through .which completely remove the washing water during the treatment or partially replaced by fresh water and the withdrawn water in pointed boxes O. The like. Is passed, whereupon the entrained by the withdrawn water and Fine goods deposited in pointed boxes, optionally white. is abandoned where it is taking into account the desired end products according to their nature and belongs to its specific weight.

This offers the possibility of fine sludge when washing channels to gain with different m ash content, because from the processing of the specific The sludge that is used for the heaviest good parts is richer in ash than from the channels Channels that process the specifically lighter good parts.

One can further treat the fine sludge separately depending on its Also add the quality of one of the final goods, which is not possible, for example is when you remove the fine material, as is usual with fine material processing, by rinsing it off on fine-meshed sieves from washed goods, unseparated according to ash-rich and low-ash sludge, i.e. with a relatively high average ash content, as completely as possible, because the ash-containing fine material remains in the washed goods whose quality would deteriorate too much. The one so departed mostly ash-rich mud can then only be considered inferior. Well spent or at best in limited quantities with the washed items after drying added again «- earth.

According to the invention, the new processing method can also be used to the ash-rich, for example, often contained in considerable quantities in fine coal, to remove the 1Vert of the final product, often fine sludge, before they get into good parts, from which they can only be eliminated with difficulty can be. This is also possible with the method mentioned at the beginning, at your the goods before the actual processing via refining devices is performed, but in this case in a much more complicated manner, increasing the downforce Way.

These disadvantages occur in the method on which the invention is based not e = in. In order to achieve this purpose, the specifically light good parts are required Overflowing washing water contaminated by the inferior fine sludge Pulled all or part of the first part of the reprocessing channel and done it Fresh water replaces before the material to be reprocessed reaches the next part of the channel, The ash-richest fine material floating in the withdrawn water with the overflow a pointed box or the like located under the take-off point the coarser good parts carried along by the water in the pointed box or the like either the reprocessed goods or one of the final goods.

In the drawing, the invention is illustrated by an exemplary embodiment.

The figure shows a gutter washing system with three processing channels a, b, c, whose Aastragapparate are labeled with d, their Sainmeloer supply channels with e. The treatment channels are equipped with pointed boxes f, g, h, i, k, Z, »a, -tt, o, which serve to draw off the washing water and to optionally use the solids it contains. These solids can, for example, be added again to the material to be processed in the manner shown by the arrows, or they can be fed directly to the end products.

In the figure, A, B, C indicate the discharge points for pure coal, D the collecting bunker for pure mountains, E the clarification sump for mountain sludge "F the clarification sump for medium-sized sludge, G the clarification sump for low-ash sludge At the head of the channel a, the ash-richest fine already excreted through the pointed box f. The ash-richest solids contained in the water flowing off the overflow of the pointed box f, for example, together with the overflow of the pointed boxes g, la, get directly into the Clarification sump for mountain sludge, while the good parts that settle in the pointed box f, depending on their ash content, can either be fed into the clarification sump for mountain sludge E or into the processing channel b above or behind the pointed box g .

However, this means that the task and uses for the The fines contained in the exhaust water have not yet been exhausted, because the system can this fine material, depending on its ash content, is always given up as it is for the set operational tasks appear to be most appropriate.

Claims (3)

PATENT CLAIMS: i. Process for separating the finest good parts from fine-grained material to be processed, e.g. B. coal, in gutter-enwäschen, characterized by one or more times complete or partial withdrawal of the washing water during the treatment, the withdrawn amount of water in setting devices, z. B. pointed boxes (f, g, h, i, k, L, m, n, o), in which the coarser fine material parts settle and optionally the processed material or one of the final goods (A, B, C) are fed , while -the water flowing off at the overflow of the pointed boxes, depending on the ash content of the solids floating in them, is optionally fed to the clarification sumps (E, F, G) for low-ash or high-ash sludge. 2. The method according to claim i, characterized in that the finest good parts Wash water with a specific heavier weight is removed as completely as possible is before the items to be processed with the simultaneous addition of fresh water in . reaches the next part of the channel (b or c). 3. Washing trough for practicing the method according to claim i and 2, characterized in that in the processing troughs (a, b, c) known facilities such. B. with sieves, equipped pointed boxes (f to o) are switched on, which are used to withdraw the washing water during processing in whole or in part.