US825326A - Roasting-furnace. - Google Patents

Description

PATENTED JULY 10, 1906.

F. KLEPETKO. ROASTING FURNACE.

APPLICATION FILED NOV. 6, 1905.

0., WASHINGTON. n c.

FRANK KLEPETKO, OF NEl/V YORK, N. Y.

ROASTING-FURNACE.

Specification of Letters Patent.

Patented July 10, 1906..

Application filed November 6,1905. Serial No. 286,047.

To all whmn 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 one form of my invention applied thereto. Fig. 2 is a crosssection on line 2 2 of Fig. 1. Fig. 3 is a diagrammatic view showing a modified form of circulation through the shaft and rabble-arms, and Fig. 4 is a diagrammatic modification showing the feed-pipe entering the bottom of the shaft and terminating in the lower compartment thereof.

The present invention relates to improvements in cooling systems for the rabble-shaft and rabblearms of ore-roasting furnaces of the turret or McDougall type, (although the same is applicable to a furnace of any type whatsoever,) and has for its special object the utilization of steam, the superhcating of which in its passage through the shaft and arms results in the abstraction of a suflicient number of heat units from walls of the rabble apparatus, so as to reduce their temperature down to a point where undue disintegration and destruction of the same from.

contact with the furnace charge is no longer possible. The system of circulation of the cooling medium is such as to insure intimate contact of the steam at all points with the rabble-shaft and arms, so that a sufiicient reduction .in the temperature of these parts results, and the life of the apparatus is materially prolonged.

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 wvithin the shaft, extending to a point near the bottom of the shaft and discharging thereinto, the feeder being supplied with water from a pipe 6, entering the stuffingbox 7 and leading to any source of supply. (Not shown.) The shaft is divided into a series of independent compartments by means of the transversely-disposed partition-walls 8, each partition-wall being substantially continuous with the upper walls of each adjacent pair (or cluster) of arms, so that each compartment communicates with the cluster or series of arms extending into the hearth opposite thereto. The several compartments of the shaft are brought into communication with one another by means of the open-ended branches or conduits 9, leading from a nipple 10, secured to each partition 8, the chamber or space above the top partition having leading therefrom the outlet or exhaust nozzle 11, which may either discharge into a trough 12 or into any suitable chamber from which the exhaust can be conducted to any desirable point of consumption.

quantity of water is injected through the pipe 6 into the bottom compartment, and by evaporation the steam fills the bottom compartment, escaping through the arms 4, branches 9, and nipple 10 into the next compartment, and so on until it reaches the upper compartment, whence it escapes through the branches 9 and exhaust-pipe 11 into the trough 12, the steam becoming superheated in its passage through the furnace. circulation through the shaft and arms the steam as it is delivered to any compartment through the partition 8 flows outwardly to the outer ends of the arms, whence it is drawn inwardly toward the axis of the shaft I10 In the operation of the furnace a limited In its through the converging .series of branches 9, leading to the next compartment, and so on to the ast compartment.

For purposes of the present invention the feeder need not necessarily discharge into the bottom compartment, but may discharge into any compartment, and in Fig. 3 I have shown adiagrammatic view in g which the feed-pipe p enters through the bottom of the shaft, passing through the shaft and discharging into the upper end thereof orinto the upper compartment. The circulation in that case would be the reverse from that shown in Fig. 1, the exhaust escaping through the exhaust-pipe 1 1 into a trough 12.

In Fig. 4 I show a feeder p discharging into the bottom compartment, the said feeder entering through the bottom of the shaft, in which event the circulation is the same as in Fig. 1; but the construction differs therefrom in that the feeder does not pass through the several partitions 8.

Obviously the system can be applied to any kind of furnace or hearth and may be used in any art.

. Having described my invention, claim is- 1. In a rabble apparatus, a hollow shaftdivided into a series of compartments, hollow arms leading from said compartments, means for introducing a circulating medium into a compartment and into the arms leading therefrom, and conduits within the arms for conveying the medium from the arms to the next succeeding compartment of the shaft, substantially as set forth.

2. In a rabble apparatus, a hollow shaft divided into a series of compartments, hollow arms leading therefrom, means for introducing a circulating medium into a compartment and into the arms leading therefrom, and conduitsconfined within the arms and establishing communication with a contiguous compartment through the partition-wall separating the compartments, whereby the cooling medium in the arms leading from any compartment is conveyed to the next comwhat I the axis of the shaft for conveying the medium out of the arms into the shaft at a point contiguous to such axis, substantially asset forth.

4. In a furnace having a plurality of hearths, a hollow shaft passing through the hearths, hollow arms radiating from said shaft and extending into the several hearths, a series of transverse partitions formed in the shaft in substantial continuation of the upper walls of the arms dividing the shaft into a series of contiguous compartments, means for introducing a circulating medium into one of the terminal compartments of the series, a series of open-ended conduits in each series of arms establishing communication/ through a partition with the section of shaft forming the next succeeding compartment, and an exhaust leading from the opposite terminal compartment, substantially as set forth.

5. In a rabble apparatus, a hollow shaft divided into a series of compartments by transverse partitions, hollow arms leading from the respective compartments, means for introducing a circulating medium into a compartment, and, means confined within the arms and the compartment for conducting said circulating medium out of the compartment and its arms into the next adjacent compartment, substantially as set forth.

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

FRANK KLEPET-KO.

I/Vitnesses:

EMIL STAREK, J. E. DEAKIN.

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