DE3006853A1 - Coke oven coal prodn. - by compacting coking coal - Google Patents

Abstract

Coal charge for coke ovens is produced by compacting coking coal, partic. coking coal difficult to carbonise, by compressing into slabs in the roller ring of a smooth roller press. The slabs pref. have breaking score-lines so that they can be broken up to a predetermined piece size after cooling. Dust-like constituents are removed from the coal by air separation and/or screening. The coal may consist of a mixture of broken slabs and a portion of undersize and/or uncompacted coking coal. The mixture ratios are 40-50%(pref. about 50%) slabs and 20-60% (pref about 50%) breeze and/or undersize and/or uncompacted coking coal.. The invention provides coke oven coal of the greatest possible density and bulk density in order to favourably influence both the strength of the coke and the coking time. Also, as the roller surfaces do not contact each other the wear on the rollers is reduced.

Description

Coke oven input produced by compacting coking coal

Batch coal, and method and apparatus for making the The invention relates to furnace feed coal produced by compacting coking coal, as well as a method and a device for their production.

It is known to reduce the bulk weight of coke coals that are difficult to coke Increase compacting. For example, this happens in the ramming mode, with loose Coking coal is tamped down within the coking chambers.

It is also known to coke coal before being filled into the coke chamber, for example in a die press, to be compacted to form blanks (INT.APPLICATION NO.PCT / DE 78/00032).

There are also a number of briquetting processes for production became known from coke oven feed coal, for example for the production of metallurgical coke from coal briquettes, according to DE-OS 23 58 122.

There are a number of disadvantages with the methods mentioned: For example the ramming process requires a complex in terms of space requirements and costs Tamping device above the coking chambers. Further disadvantages result from the Lengthening of the charging times, from increased stress on the comb walls, as well as insufficient and especially uneven compression.

The manufacture of shaped pieces, for example in a die press, is also unsatisfactory because it requires a high level of mechanical and operational Effort and thus causes excessive costs.

In addition, those produced with it tend to be usually cylindrical rollable briquettes for segregation.

And finally, the production of metallurgical form coke from Bri.ket, ts requires an even higher cost of machines and costs, being egg-shaped and or pillow-shaped briquettes are even more susceptible to segregation are.

The object of the invention is with the least possible effort Manufacture of coke oven feeders with the highest possible density and bulk density in order to produce to favorably influence both the coke strength and the cooking time. Included The aim is to reduce the machine effort and the ongoing operating costs ever generated ton of coke oven inlet; Continues to exist part of the task in this - segregation processes due to the special shape of the compacted material to avoid as much as possible during transport and when filling the coke oven chamber, as well as short charging times with gentle stress on the coking chamber walls to enable.

The object is achieved in that the coke oven feed coal at least to a considerable extent from pressed in the nip of a smooth roll Schülpen exists.

The invention has the following advantages: Dadurclle that fine-grained Coking coal is pressed on a substantially smooth roller press, the Roll surfaces do not come into contact with each other when compared to form roll presses or die presses, such as those defined for the production of moldings with or at least partially defined dimensions are used, the wear-the Press largely reduced and thereby achieved a significant cost saving.

In addition, operating parameters such as press temperature, Compaction pressure, roller circumferential speed, sculp thickness, pre-compaction, feed grain size, Admixture of baking coals or a mixture of different cabbage sorts, adjusted within wide limits up to an optimal operating result will.

In an embodiment of the invention it is provided that the coke oven feed coal contains an admixture of undersize and / or abrasion and / or loose coking coal This measure, which is essential to improve the economy CoRs furnace feed coal produced according to the invention contributes, in particular thereby makes it possible that scabs neither during transport nor during the filling process; tend to segregate, which as a result of their use as an integral part the coke oven feed coal gives the possibility of proportions of undersized grains, abrasion or mix in loose coking coal to fill the gaps.

In a further embodiment it is provided that dust-like components inl undersize and / or in the abrasion and / or in the coking coal to a given To be reduced to a minimum.

This advantageously increases the gas permeability of the coke oven feed coal improved and, moreover, impermissible during transport and during the filling process Prevents jam build-up.

Further advantageous properties of the coke oven feed coal according to of the invention result from the fact that this is an essentially seamless, preferably having filled grain band. This advantageously results in a high Degree of filling of the coke oven chamber, high strength of the coke and favorable cooking behavior of the batch used.

Finally, it is provided that the Koksoren feed coal from a Mixture of crushed scabs with a proportion of undersized grain and / or abrasion and / or uncompacted coking coal.

Whether and to what extent the scabs are crushed depends first and foremost Line of the operating parameters in their production, for example from the Thickness of the scabs, their average size and firmness, and so on. According to such parameters and also according to type and property the compressed coal, the expert will use proportionate mixtures of crushed scabs, Select undersize, abrasion and coking coal in such a way that with as little preparation effort as possible an optimum of filling level, coke quality and cooking time with a minimum of operating costs is achieved.

It can be provided that the mixture is approximately 40 to 80 fo, preferably approximately 50 56 scabs, and 20 to 60 56, preferably approximately Contains 50% abrasion and / or undersize and / or uncompacted coking coal.

A method for producing coke oven feed coal accordingly of the invention, in particular from coking coals that are difficult to coke, consists in that the coking coal at least in part by compaction in the nip of a substantially smooth roller press is pressed into scabs.

It is provided that the scabs, if necessary after cooling, be crushed to a predetermined piece size of the coke-char.

Another advantageous measure provides that the content of l, nterl-orn and / or abrasion and / or loose coking coal is brought to a predetermined level.

any and known process steps are available to the specialist for this purpose available, such as measures of classification and / or batch formation.

It is also provided that dust-like components at least partially can be removed from the coke oven feed coal by air classification and / or classification.

The common advantage of all of these measures and sub-measures is there in that the production of coke oven feed coal after Invention with extremely little mechanical effort and therefore with relatively little Costs can be met, the flexibility of the process being an optimization of the process thus produced product in a simple manner.

A device for carrying out the method with a roller press provides that this has essentially smooth rollers, which are during the pressing process do not touch in the nip.

Under a roller press with an essentially smooth roller is used here and in the following a machine understood which in comparison to the known Form roll presses on the roll mantles does not have any form depressions, as is the case with these Production of briitettes with defined dimensions are required.

In the case of one essentially equipped with smooth rollers Roller press is the material, preferably with a pre-compaction and plug screw, inserted into the nip and between the spaced opposite one another rollers moving in opposite directions compacted with relatively high compression forces.

In an embodiment of the device it is provided that the substantially smooth rollers have a profiling, which consists of regular or irregular consists of relatively low surface structures.

Such a relatively minor profiling, for example in terms of shape of knobs or grooves, possibly a few millimeters in height or depth, improved the retractability of the rollers and improves the crushing of the scabs, for example by embossing break notches.

In the following the procedure for the production of oksofen-feed coal is described According to the invention on the basis of Bed. ;; pielen explained in more detail in the block diagram.

1 shows the block diagram of a system according to the invention, FIG. 2 shows an embodiment of the system according to FIG. 1, also in a block diagram, 3 shows a further embodiment of the system, also in a block diagram.

Coking coal is shown in FIG. 1 from a storage bunker 1 with the help of a Belt weigher 2 given in metered amounts to the stop screw 3 of a smooth roll press 4 and then pressed into scabs in the nip 5. The scabs are symbolized abandoned by arrow 6, a crusher 7 and crushed therein to Schulpenbruch, which, symbolized by the arrow 8, together with in the crushing process Accruing undersized grains and abrasion, as coke oven charcoal on stockpile 9 or in any other way is temporarily stored before filling into the coke chamber.

Fig. 2 shows a modified system in which different types Coking coal "A" and "B" and optionally an additive etc ", for example one Binder-rich, baking coal from the feed devices 10, 11 and 12 to a premiscliung are combined and the roller press 4 are given.

Part of this premix is branched off at point 13 and one Intermediate bunker 14 supplied, from which the premix by the metering device 15 is added to the compacted and crushed flakes in a gelatinized amount.

Another embodiment of the system is shown in FIG. 3, in which the broken scabs of a classifying device 16 are abandoned, which at a separating cut, for example 1.5 mm, separates fine material, while the Ub.Drlauf is taken as coke oven use coal on stockpile 9. Excreted fine material becomes with the schematically indicated transport device 17 to the roller press 4 is recirculated.

The systems shown in the example only represent a selection of possible, exemplary embodiments of the subject matter of the invention. You can in any Modified in a way, combined with one another or within the scope of the craftsmanship of a person skilled in the art, and fall under the invention if they are a the applicable patent claims.

Claims (13)

Claims 1. Produced by compaction of coking coal Coke oven feed coal, it is indicated that this is at least to a considerable extent from scabs compressed in the nip of a smooth roll consists. 2. Koksofen- Eins @ tzkohle according to claim 1, characterized in that that this is an admixture of undersized grains and / or abrasion and / or loose coke cob contains. 3. Coke oven feed coal according to claim 1 or 2, characterized in that that dust-like fractions in the undersized grain and / or in the abrasion and / or in the coking coal are reduced to a given ninirnum. 4. Coke oven feed coal according to one of claims 1 to 3, characterized characterized in that this is a substantially gapless, preferably filled Has grain band. 5. Ko @ furnace feed coal according to any one of claims 1 to 4, characterized in that that this consists of a mixture of crushed scabs with a proportion of undersize and / or abrasion and / or uncompacted coking coal. 6. Coke oven feed coal according to one of claims 1 to 5, characterized characterized in that the mixture is approximately 40 to 80 56, preferably approximately 50 56 scabs, and 20 to 60 96, preferably approximately 50 56 abrasion and / or undersized grain and / or contains uncompacted coking coal. 7. Process for the production of KoksoSen-EinsatzkollJe, accordingly one of claims 1 to 6, in particular made of coking coals that are difficult to coke, thereby characterized in that the coking coal is at least partially compressed in the roller gap a substantially smooth roller press is pressed into scabs. 8. The method according to claim 7, characterized in that the Scirt'ilpen optionally after cooling, to a predetermined size of the coke oven charge coal crushed @@. 9. The method according to claim 7 or 8, characterized in that the Scabs have break notches. 10. Veifahren according to claim 7, 8 or 9, characterized in that the content of undersize and / or abrasion and / or loose coking coal to a given value Measure is brought. 11. The method according to any one of claims 7 to 10, characterized in that geken.nzeichS that dusty £ proportions at least partly through air sifting and / or classification be removed from the coke oven feed coal. 12. Device for performing the method according to one of the claims 7 to 11 with a roller press, characterized in that this essentially smooth rollers that do not touch during the pressing process in the roller gap. 13. The apparatus according to claim 12, characterized in that the essentially smooth rollers have a profiling which consists of regular and / or irregular, relatively low surface structures.