US831165A - Roasting-furnace. - Google Patents

Description

No. 831,165. 1 PATENTED sEPT.18, 19106..

F. KLEPET'KO.

ROASTING PURNACE.

APPLIGATION FILED Nov. s, 1905.

Tgl IZ f' 10 YF r1-gf1-g5- FRANK KLEPETKO, OF NEW YORK, N. Y.

ROASTING-FURNACE.

Specification of Letters Patent.

raten'tea sept. 1s, 1906.-

Applioation led November 6, 1905. Serial No. 286,045.

To a/ZZ whom it may concern:

Be it known that I, FRANK KLEPETKO, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Roasting-Furnaces, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part hereof.

My invention has relation to improvements in roasting-furnaces; and it consists in the novel construction and arrangement of parts more fully set forth in the specification and pointed out in the claims.

In the drawings, Figure 1 is a middle vertical section of a conventional McDougall ore-roasting furnace, partly broken, showing a corresponding section of one form of my invention applied thereto. Fig. 2 is a vertical section through one of the rabble-arms on the line 2 2 of Fig. 1. FigB is a corresponding section of the adjacent rabble-arm on the line 3 3 of Fig. 1. Fig. 4 is a horizontal section on the line 4 4 of Fig. 1. Fig. 5 is a diagrammatic view of a modification of my invention. Fig. 6 is a diagrammatic view showing a second modification. Fig. 7 is a vertical sectional detail. of the top of the shaft, showing a modified form of stuffingbox and chamber for receiving the exhaust; and Fig. 8 is a similar view showing a still further modification for disposing of the exhaust.

The object of the present invention is to utilize superheated steam as a cooling medium in effecting the necessary reduction in the temperature of the hollow rabble-shaft and rabble-arms used in connection with the turret or McDougall type of roasting-furnace with a view of preserving the rabble apparatus against the destructive and deleterious effects of the gases and high temperature to which these parts are subjected during the roasting operation. The main object of using superheated purpose is to avoid using excessive quantities of water for cooling, water having a large capacity for heat absorption and being for that reason in many instances objectionable, since the absorption of an abnormal number of heat units from the furnace charge or ore results in such a decided reduction in the temperature thereof as .to render the steam or vapor for the roasting incomplete. Besides it converts the furnace into a hot-water generator, which is not always desired. The present improvement is a qualification of a construction utilizing superheated steam for a similar purpose and for which an application for Letters Patent was filed of even date herewith, the differencebeing that the circulation of the cooling medium through the several rabblearms and hearths both vertically and radially is in series instead of in series and in multiple.

In detail the invention may be described as follows:

Referring to the drawings, F represents the furnace, and h the several hearths in which the material is treated, the said material dropping from the upper hearth successively through the several hearths until it is delivered into the delivery-hopper, (not shown,) the hearths being provided, respectively, with the central and marginal openings 1 2 forI the passage of the material. Passing `centrally through the hearths is the rotatable hollow rabble-shaft 3, from which radiate the series of hollow arms 4, extending into the several hearths and carrying rakes 5,

by which the material is successively fed from one hearth to the hearth immediately beneath it, all as fully understood in thefart.

Referring particularly to Fig. 1 of the drawings, 6 represents a feeder or feed-pipe, preferably stationary, which is located within the shaft extending to a point adjacent to one end of the shaft and preferably the bottom, (though obviously it could pass through` the bottom and terminate at a point near the top, as shown by feeder p in Fig. 5, without departing from the nature of the invention, the difference resulting in a reversal of the circulation, as must be obvious from the construction,) the upper end of the pipe passing into a stuffing-box 7, from which extends the supply-pipe 6', leading to any source of water-supply. (Not shown.) The shaft is divided into a series of compartments or chambers a l) c d e f g, (the furnace being `broken to omit chambers c and d,) the chamlTOO pipe 9, the former, spanning, as it does, they partition 8, naturally exceeds the pipe 9 in length an amount equal to the diameter of the cross-section of the shaft or the diameter of the partition 8 (where thev shaft is cylindrical.) The upper end or top compartment -of the shaft is provided with an outlet or discharge pipe 10, the exhaust being conducted to any desired point of consumption.

In the operation of the circulating system as applied to the present rabble shaft and arms the water is delivered in limited quantities into the bottom compartment a of the series, the said water being vaporized and constrained to pass through the several shaft compartments and arms and their distributing-pipes, as shown by the arrows in Fig. 1- that is to say, the vapor or steam (which in its passage upward becomes superheated) passes from the compartment a through the pip-e 9 into the rabble-arm which contains it, thence through the complementary pipe 9 'into the opposite arm 4 of the same pair,

f haust-pipe 10. As circulation of the ,thence into the next compartment t, and so on till the last compartment is reached, where the steam exhausts through the exseen from the arrows, the

tubes and arms vertically is in series, but radially the circulation is through a multiple distributing-pipes of arms, although to effect this multiple radial circulation the circulation through the 9 9 and the arms is radially in series. By circulation radially through a multiple7 is of course meant that'the current passes successively or in series through a multiple of arms disposed in the same plane about the shaft and extending into any particular hearth, being distinthrough several arms.

guished,v from a circulation in multiple, where v'the same is a simultaneous one The construction here shown would of course be equally applicable to water or any steam, gas, or any vapor.

The feeder may of course pass into the liquid as well as lower compartment a through the bottom of l the shaft and terminate in said compartment, as shown by feeder p in Fig. 6, the

' circulation being in every respect the same as already described. In Fig. 5, where the circulation'is downward, the exhaust-pipe is l represented by 10.

In Fig. 1 the exhaust-pipe 10 leads from a i sleeve or tube 12 enveloping the feeder 6, the

stufling-box 7 forming the upper end of said vapor through the shaftv sleeve, which is coupled in any mechanical In Fig. 7 the upper open end of the shaft l 3 rotates within an inverted cup 14, coupled to the roof of the furnace in any mechanical manner, a suitable stuffing-box 15 being interposed between the parts, the feeder passing through a stufling-box 16 at the top of the cup and the exhaust-pipe 17 conveying the exhaust-steam from the peripheral Wall of the cup to any suitable point of consumption.

In Fig. 8 the feeder 18 is disposed to one side of the axis of the shaft 3, leading from the bottom of an annular water-trough 19, to which water is supplied from a pipe 20. In this modification the exhaust-pipe 21 passes centrally out of the top compartment of the shaft 3 through a stuffing-box 22. The trough 19 of course rotates with the shaft.

The above are a few examples of the manner in which the exhaust-steam may be disposed of but of course they may be multiplied almost indefinitely.

Having described my invention, what I claim is` 1,'In a rabble apparatus, a hollow shaft and hollow arms therefor, a feeder passing centrally through the shaft and discharging a cooling medium thereinto at one end of the shaft, and means for circulating said medium through the shaft and arms vertically in series, and radially through a multiple, sub-l stantially as set forth.

2, In a furnace having a plurality of hearths, a hollow shaft passing through the hearths, a series of hollow arms radiating from said shaft and extending into the several hearths, a series of contiguous compartments disposed throughout the shaft, a tube leading from each compartment into one of the arms extending into any hearth, a complementary tube leading from said arm to the adjacent arm of the same hearth, and means for circulating a cooling medium through the shaft and tubes vertically in series, and into the arms radially through a multiple, substantially as set forth,

3. In a furnace having a plurality of hearths, a hollow shaft passing through the hearths, a series of hollow arms radiating from said shaft and extending into the several hearths, a series of contiguous compartments disposed throughout the shaft, a tube leading from each compartment into one of the arms extending into any hearth, a com- IOG plementary tube leading from said arm to the adjacent arm of the same hearth, and means for circulating a cooling medium through the shaft, and tubes vertically in series, and radially in series, substantially as set forth.

4. In a furnace having a plurality hearths, a series of hollow arms radiating from said shaft and extending into the several hearths, a series of contiguous compartments separated by transverse partitions disposed throughout the shaft, a tube leading from each compartment on one side of a partition into one of the arms extending into any hearth, a complementary tube leading from said arm on the opposite side of said partition to the adjacent arm of the same hearth, a feeder discharging a cooling medium into one end of the shaft, and an outlet for said medium at the opposite end of the shaft, substantially as set forth.

-5. n a rabble apparatus, a hollow shaft and hollow arms therefor, a series of compartments distributed throughout the shaft and separated by contiguous partitions, a tube leading from one compartment to an arm on one side of a partition, and a complementary tube leading from said arm on the opposite side of the partition to an adjacent arm, substantially as set forth.

6.- ln a rabble apparatus, a hollow shaft, and hollow arms therefor, means for heating the same, and means for feeding limited quantities of cooling liquid into one end of the shaft whereby the same is vaporiZed and allowed to circulate through said shaft and arms, substantially as set forth.

7. 1n a furnace-rabble apparatus, a hollow shaft and hollow arms therefor, means for introducing thereinto limited quantities of liquid adapted to be vaporized under the action of the heat from the furnace charge, and

of hearths, a hollow shaft passing through the j means for circulating said vapor through said I shaft and arms, substantially as set forth.

8. In a furnace-rabble apparatus, a hollow I shaft and hollow arms therefor, means for inl troducing thereinto limited quantities of liquid adapted to be vaporized under the action of the heat of the furnace charge, and means j for circulating the said vapor through said j shaft and arms vertically in series and radially through a multiple, set forth.

substantially as 9. ln a furnace-rabble apparatus, a hollow shaft and hollow arms therefor, me ans for introducing thereinto limited quantities of liquid adapted to be vaporized under the action j of the heat of the furnace charge, means for l circulating the said vapor through the shaft and arms vertically -in series, and radially through a multiple, and a suitable exhaust for said circulating medium, substantially as set forth. j 10. n a rabble apparatus, a hollow shaft and hollow arms therefor, means for circulating a cooling medium through the shaft and arms vertically in series and radially in series, and inlet means and outlet means for the circulating medium at one end of the shaft, substantially as set forth.

11. 1n a rabble apparatus, a hollow shaft and hollow arms therefor, means for circulating a cooling medium through the shaft and arms vertically in series and radially in series, and inlet means and outlet means for the circulating medium at the top of the shaft, substantially as set forth.

In testimony whereof l affix my signature in presence of two witnesses.

FRANK KLEPETKO-,

v Witnesses;

l EMIL STAREK, l J. E. DEAKIN.

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