DE102004002063A1 - Secured material heap - Google Patents

Abstract

Material piles can be secured against deserts by covering the stockpiled material with a slurry of sealant that dries to a thin, hard and crusty surface.

Description

The The invention relates to material dumps secured against abrasions Application of a slurry a sealing material, a method for its construction and Devices for applying the sealing material.

In In many areas of the basic industry is the stocking or Mixture of materials in dumps usual. For example, be called: coking plants, smelting works, Sintering plants and asphalt mixing plants. These are either used for stockpiling, for mixing different products before further use or created for the provision of supplies heaps. In heaps and / or Coal beds are used for example coal, coke, grus, iron ore and Limestone chippings choked up.

modern United coking plants with a big daily throughput z. B. usually refer to several coal components of different quality and mix them together to form the feed mixture. A common kind the mixture is the layering of the components in longitudinal mixed beds according to the so-called chevron method (cement-lime plaster, issue 8/1983) or in pens in the form of "kidney-shaped" mixed beds.

at The chevron method is the individual components through the Rail-moving, equipped with a ribbon bow wipers cupped one above the other layered. Often, the amounts of coal for a week or more in a mixed bed stored. The finished mixture is then with a scraper chain left off and z. B. on a conveyor belt pushed for further use. The aufhaldete material lies usually some time until it is dismantled again. Dries by weathering while the material and fine-grained Parts can be blown off by the wind.

This does not lead only to environmental problems but also to a loss of material.

This Problem is tried by moistening the aufgehaldeten material with longitudinal to solve the heaps of water sprayers. Moisturizing, however, works only in the short term, as the water seeps into the lower layers and there under one circumstances undesirable increase the water content in the material leads. Dries on the surface the heap quickly and the material can be blown off again become. A canopy and / or scaffolding The entire heap is usually out of the question for economic reasons.

task The present invention is the avoidance of Abwehungen of Stuffed material.

It were found against debris secured material dumps, the characterized in that the material stored as heap with a slurry covered with a sealing material that results in a thin, hard and crusty surface dries.

The material stacks according to the invention are secured against windrows even in strong winds and remain even in extreme climatic conditions, z. B. heavy rain, snow or ice stable.

in the The present invention relates to the material dumps preferred materials of the basic industry, the fine-grained fractions included, which can be blown off by the wind.

Prefers are coal, coke breeze, fine iron ore and limestone chippings.

sealing material In the context of the present invention are generally slurries of inert fine-grained Substances that do not react with the stored material. The sealing material should after drying a thin, hard and crusty surface form.

According to the invention generally slurries, preferably aqueous slurries used the sealing material.

It is possible before using the slurry in a known manner or one sets one already existing slurry as it occurs in other processes. In the context of the present Invention consists of the aqueous slurry preferably from 3 to 20% by weight of the sealing material which is generally finely divided.

In a preferred embodiment The present invention can use, as a sealing material, an aqueous slurry of Cement or lime can be used.

Under Cement in the context of the invention means a finely ground hydraulic Binder, which predominantly consists of calcium silicates, aluminates and ferrites, as it is used in the construction industry (DIN 8580).

All types of cement are suitable, in particular Portland cement (CEMI), Portland compo sit-Cement (CEMII) and blast-furnace cement (CEMIII).

Under Lime in the context of the present invention is understood as "fired Lime ", which is essentially consists of calcium oxides or hydroxides.

In another preferred embodiment of the present invention as sealing material organic binders, particularly preferred Polyalcohols are used.

In another preferred embodiment The present invention can use sewage sludge as a sealing material be used.

sewage sludge in the context of the present invention arises essentially by total or partial biodegradation of domestic and industrial wastewater in sewage treatment plants and / or wastewater treatment plants.

Especially preferred is the non-digested sewage sludge from industrial wastewater treatment plants or municipal sewage treatment plants. Also particularly suitable is sewage sludge from biological wastewater treatment plants of coking plants. It can also be more rotten sewage sludge be used.

Of the used according to the invention sewage sludge preferably has a dry matter content in the range of 4 to 10% by weight on.

Around potential To counteract hygienic problems, the sewage sludge can be applied before applying Addition of biocides microbially harmless.

The Thickness of the seal in the context of the present invention can vary within wide limits. The thickness is preferably in the Range from about 0.5 to about 5 mm.

It was also a method for securing material dumps against Abwehungen found, in which the surface of the stockpiled Material with a slurry a sealing material is sprayed until a uniform coverage is reached and then by drying the slurry a thin, hard and crusty surface arises.

to Application of the slurry of the sealing material are basically all devices applicable, the a uniform application enable.

In Usually, the sealing material is removed from a storage container, in if appropriate, the slurry can also be prepared, in a spraying system pumped through which the sealing material evenly over the Heap is distributed.

The Dry the surface usually takes place at the atmosphere by the outside temperature and the wind. It goes without saying also possible, the drying process by feeding and if necessary, suck off heated To accelerate air.

in the Within the scope of the present invention, it is particularly preferred that Apply sealant material with devices that are in Devices for setting up and dismantling heaps and / or mixed beds integrate.

object Therefore, the present invention are also devices for application a slurry a sealing material on the surface of a stockpiled Material, characterized in that the sealing material over a Manifold located on the rails for the reclaimer device of the heap moves, is applied to the heap.

The Device can be superimposed on the example of the chevron method layered materials explained become.

The inventive device goes to the Slide rails of the recharging device. Therefore have to in the two-bed technique of the chevron method, two devices are each fully on End of the rails are set up. The each held up Mixed bed according to the invention in a once or twice the pipe is used to distribute the sealing material to be covered. This is possible in a short time and hinders the others Processing not.

In the device according to the invention the distributor tube is preferably designed as a spray arch, the on the rails can be moved.

A special embodiment The present invention is characterized in that support structure (Hollow beam) itself is designed as a distributor pipe.

At the support structure then become pipe rods with suspended at the end flat jet and / or full cone nozzles, with the entire heap surface can be sealed. Number and jet direction of the nozzles depend on the shape of the respective heap from.

To make the statically difficult construction cheaper, are as chassis on the Slide rails container for the sealing material arranged.

The size of the container for the sealing material depends essentially on the permissible axle load of the chassis of the support structure on the running rail. In general, it is possible to mount containers for the sealing material to be sprayed in a size of 10 m ³ to 20 m ³ .

The support structure is usually moved by an easily controllable electric motor, which is mounted in the chassis. The power supply is in on known way over a tow cable or a conductor line. Optionally, the device still by a stirrer, if applicable, a biocidal tank with metering device, collision protection, Driver's cab and heating are added. Also a diesel / diesel electric drive is possible. The chassis with the spray containers are suitable also for receiving motors, generators u. a.

The used in the invention drive and control technology is known per se.

The container the device according to the invention are usually refilled at the end of a spraying operation at rest.

A Another preferred embodiment of present invention is characterized in that a truss structure is used, in which the manifold is performed separately.

The support structure is here as truss bearer designed, over two chassis moved in the manner indicated above on the rails becomes. In the truss bearer There are separate distribution pipes to Flachstrahl- and / or Full cone nozzles.

The present invention can be understood from the 1 to 6 be explained:

1 shows a device for building and dismantling heaps (or mixed beds) in the supervision. The material to be stored is mixed with a spreader ( 2 ), on the rails ( 3 ) can be moved to the heap ( 1 ). About the spray nozzles ( 4 ) water, but also inventive sealing material can be distributed. On the rails ( 11 ), the reclaimer ( 12 ) of the material.

In 2 became the cut (AA) of the 1 characterized.

2 shows the construction of a suspended mixed bed with the different material layers ( 5 ) and (6) and the spreader ( 2 ) on the rails ( 3 ) and the running track ( 11 ) of the reclaimer in a sectional view (AA).

The conveyor belt ( 13 ) moves the reclaimed material for further use.

3 also shows a device for building and dismantling heaps (or mixed beds) ( 1 ) in the top view, but according to the invention additionally with two spray arch ( 7 ) for distributing the sealing material. The material to be stored is mixed with a spreader ( 2 ), on the rails ( 3 ) can be moved to the heap ( 1 ). On the rails ( 11 ), the reclaimer ( 12 ) of the material and the spray arch ( 7 ) over the heap ( 1 ) are driven.

4 shows a special embodiment of a spray arch, in accordance with the invention a support structure (hollow beam) ( 9 ) is designed as a distributor pipe. The stuffed up material ( 5 ) is via the nozzles ( 4 ) is sprayed with the sealing material. The sealing material is removed from the tank ( 8th ) through the spray arch ( 9 ) to the nozzles ( 4 ). The spray arch ( 9 ) is with the chassis ( 10 ) and is driven by them.

5 shows a further particular embodiment of a spray arch which is designed as a truss structure ( 9 ) is trained. The supply line with the nozzles ( 9a ) is on the truss structure ( 9 ) attached.

The stuffed up material ( 5 ) is via the nozzles ( 4 ) is sprayed with the sealing material. The sealing material is removed from the tank ( 8th ) through the spray arch ( 9 ) to the nozzles ( 4 ). The spray arch ( 9 ) is with the chassis ( 10 ) and is driven by them.

In 5 was the cut (BB) in 6 characterized.

6 shows the cross section (BB) of a formed as a framework spray arch ( 9 ).

The material stacks according to the invention are secured against windrows.

By the seal is no impairment of the aufhaldeten material.

1

when Heap trained mixed bed

2

Weanling

3

rails of the weaner

4

spray nozzles

5 and 6

various material layers

7

spray arch

8th

tank for the sealing material

9

spray arch

10

chassis

11

rails of the reclaimer

12

reclaimer

13

conveyor belt for backhidden material

A-A

Cut through 1

B-B

Section through the truss structure in 5

Claims (12)

Material dumps secured against escape, characterized in that the stockpiled material is covered with a slurry of a sealing material which dries to a thin, hard and crusty surface. Material traps secured against abrasions according to claim 1, characterized in that they are materials of the basic industry is. Material dumps secured against windrows after a the claims 1 or 2, characterized in that the slurry 3 to 20% of the sealing material in water. Material dumps secured against windrows after a the claims 1 to 3, characterized in that as a sealing material an aqueous one slurry used by cement or lime. Material dumps secured against windrows after a the claims 1 to 3, characterized in that as a sealing material organic binders z. B. polyalcohols can be used. Material dumps secured against windrows after a the claims 1 to 2, characterized in that as a sealing material sewage sludge is used. Method for securing material dumps against Abwehungen, characterized in that the surface of stockpiled material with a slurry of sealant material sprayed is achieved until a uniform coverage and then by drying the slurry a thin, hard and crusty surface arises. Using a slurry of a sealing material, which by drying a thin, hard and crusty surface forms, to secure material dumps against Abwehungen. Apparatus for applying an aqueous slurry of a Sealing material on the surface of a stockpiled Material, characterized in that the sealing material over a Distributor pipe, which runs on the rails for the reclaimer device of the heap distributed becomes. Device according to claim 9, characterized in that that the manifold over the entire surface of the material being stored is moved. Device according to claims 9 and 10, characterized that the manifold itself serves as a support structure. Device according to claims 9 and 10, characterized that a truss construction is used, in which the manifold is performed separately.