US1162600A

US1162600A - Process of agglomerating flue-dust or other finely-divided material.

Info

Publication number: US1162600A
Application number: US2721415A
Authority: US
Inventors: Carl Giesecke
Original assignee: Individual
Current assignee: Individual
Priority date: 1915-05-10
Filing date: 1915-05-10
Publication date: 1915-11-30
Anticipated expiration: 1932-11-30

Description

c. GIESECKE. PROCESS OF AGGLOMERATING FLUE DUST OR OTHER FINELY DIVIDED MATERIAL.

APPLICATION FILED MAY 10. 19l5.

Patented Nov. 30, 1915.

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CARL GIESECKE, OF BRUE'SWIGK, GERMANY. I

PROCESS .OF AGGLOMERA'IING ELITE-DUST OR OTHER FINELY-DIVIDED MATERIAL.

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Specification of Letters latent. Pate ted Nov. 3(1 1915.;

Application filed May 10, 1915. Serial 1%. 2731.4.

To all whom it may concern a Be .it' known that/I, GARL Grnsnon'n, engineer', citizen of the Duchy of Brunswick, Empire of Germany, residing at Brunswick, Germany, have invented certain new and useful Improvements in Processes of Agglomerating Flue-Dust or other Finely- Divided Material, of which the following is a specification. i

My invention relates to improvements in the process of burning or agglomerating dust from the throats of high furnaces, fine ore,- and the like, and the object of-the improvements is to provide a process whereby the said materials are baked together or agglomerated.

In the preferred form of the invention the dust or fine ore is moistened a little and charged in a shaft furnace, as is known in the art. In a certain zone of the said shaft furnace the material is subjected to the sudden action of high heat, and immediately after leaving the said zone, it is rapidly cooled by the action of blasts of compressed air. By thus suddenly heating the material -it is baked together so as to form lumps of larger or smaller size, and, yet the particles are not molten or fused together. By suddenly cooling said lumps inner strains are caused, which burst the big lumps apart, so that the product Withdrawn from the furnace is in the form of pieces which are suitable for further treatment. In order to produce the high temperature which is necessary for suddenly heating the material and also'to produce the immediately following rapid cooling of. the material I supply compressed air to the mixture of fuel and material to be burnt which is passing downward within the furnace, the said com-- pressed air being supplied within an annular Zone and from the side through the wall of the furnace and tangentially of the inner part of the furnace. By thus supplying the compressed air, the-zone within which high heat is produced is exactly limited at its been heated is suddenly passed from the hot zone to the cold one in which cooling takes place.

A furnace for carrying the invention into effect is illustrated. in the accompanying drawing wherein Figure l is a vertical sectional view, and F ig. 2 is a horizontal sectional view on. the line 22 of Fig. 1, looking downwardly.

The furnace includes a shaft?) arranged above a grate portion 57 and surmounted by a cupola a having suitable openings (not shown) through which the flue dust or like material, after having been previously mois-- tened, is introduced. The shaft 6 is nearly surrounded by. an annular air supply pipe 0 connected to a source of compressed air (not shown) and said pipe is provided with several branch tubes arranged at appropriate intervals throughout its' extent and by which it is connected to the shaft 6, the tubesal opening to the interior of said shaft and being disposed tangentially to an imaginary circle within and concentric to. said ther cooling of the material takes place in the grate g. Inasmuch as the material descends through the furnace in a uniform current and at a measurably fair speed, the material which,-while it forms the stratum e is greatly heated, is immediately thereafter,

as it'descends and forms the stratum f subjected to the cooling influence of the compressed air in the cooling zone or plane referred to. From this, it follows that the material is first highly heated and immediately thereafter is substantially cooled, the

compressed air from the tubes (5 participat- 1 ing in both the heating and the immediately subsequent cooling of the material.

The remaining features ofthe furnace are of secondary importance.

The grate g is of suitable construction to provide for the further cooling of the ma terial and for its descent through the furnace as above explained. Suitable feeding or. emptying devices it arearranged below the grate to insure of the uniform downward movement of the material through the furnace. The products of combustion escape through a ventilator z.

I claim herein as my invention:

1. The herein-described process of agglomerating flue dust or other finely ,di-

videdmaterial which consists in moistening the said material, charging'the same together with fuel in a shaft furnace and introducing compressed air into said material in an annular zone, whereby a stratum of the material is subjected to high heat and is immediately thereafter rapidly cooled.

2. The herein described process of burning or agglomerating materials such as dust from the throats of high furnaces or fine ore, which consists in moistening the said materials, charging the same together with fuel in a shaft furnace, and suddenly subjecting the same to high heat and'rapidly L cooling the same prior to their discharge 15 from the shaft furnace by supplying there to compressed air in a direction tangentially of the mner part of the furnace.

In testimony whereof I have hereunto set my hand in presence of two subscribing wit- 20 messes.

CARL GIESECKE.