US798402A - Cooling device for furnace bosh-walls. - Google Patents

Description

N0. vr798,402. PAI'NTED AUG. 29, 1965. B. DREYSPRING,J. J. SHANNON, & J. W. MOGUNE.

COOLING DEVICE FOR FURNACE BUSH WALLS.

APPLICATION FILED APB.15,1905.

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UNITED STATES PA'TENT OFFICE.

ERNEST DREYSPRING, OF BIRMINGHAM, JOHN J. SHANNON, OF WOOD- LAWN, AND JAMES WV. MCOUNE, OF AVONDALE, ALABAMA.

Specification of Letters Patent.

Patented Aug. 29, 1905.

Application filed April l5, 1905. Serial No. 255,840.

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Be it known that we, ERNEST DRnYsrniNe, residing at Birmingham, J oHN J. SHANNON, residing' at Woodlawn, and JAMESJ. Mo- OUNE, residing' at Avondale, in the county of Jefferson and State of Alabama, citizens of the United States, have invented new and useful Improvements in Cooling Devices for Furnace Bosh-l/Valls, of which the following is a specification.

Our invention relates to bosh-cooling devices for blast or other furnaces, and more particularly to a plurality of separate cooling'- plates which are arranged around the outer surface of the bosh and secured inplace by a circular wrought-metal jacket.

More particularly, our invention consists in providing' a plurality of plates, cooled by the circulation of water and placed around the outside of the bosh-wall,so as to present a uniform reinforcing-surface, which acts to maintain the whole body of the bosh in a uniformly cool condition, the circulation of water through the several plates being provided by means of pipes cast or embedded therein. Such an arrangement is of material advantage over the use of independent pipes for cooling purposes not only by reason of the fact that in practice the pipes are liable when the bosh has worn somewhat to warp and project therethrough, but also because unless the cooling medium be passed through a good conductor the diusion of its cooling influence will be limited to the bosh-surface immediately opposite to the pipes, whereas in the case of our water-cooled plates the whole body of the plate is maintained at a cool temperature-and produces a uniform cooling influence on the bosh.

A further advantage of our invention consists in the fact that none of the cooling elements are brought into direct contact with the stock in the furnace, which would cause an unnecessary loss of highly-useful heat. On the contrary, the cooling-plates are so placed that they prevent only the radiation of heat from the outer surface of the bosh, thus acting, without affecting the economical action of the furnace, to preserve the boshwalls at a low temperature and preserves them and insures the longest services therefrom. Further, the provision of a continuous water-cooled body between the outer encircling metallic band and the bosh-wall will greatly reduce the liability of accident at this point.

Our invention comprises the details of construction and arrangement of parts hereinafter more particularly described and claimed, and illustrated in the accompanying drawings, which form a part hereof, and in which# Figure l represents a furnace in partial vertical section, part of the bosh-jacket being broken away to show the cooling-plates in position. Fig. 2 is a horizontal sectional View along the line a a, Fig. 1. Fig. 3 is an enlarged detail view of one of the coolingplates.

Similar reference-numerals refer to the same parts throughout the drawings.

We have illustrated our invention as applied to a furnace of ordinary construction, comprising a crucible l, bosh 2, and shaft 3. The shaft rests upon a mantel 4:, which is supported by vertical columns 5. The crucible is surrounded by a jacket 6 and a twyerjacket 7 and is also provided with the usual twyers 8 and tap-hole 9. The furnace thus described is of common design and forming no part of our present invention may be modified as desired.

The bosh 2 of the furnace is surrounded by a wrought-metal jacket 10 in the shape of an inverted frustum of a cone, which extends from the twyer-jacket to the mantel 4., or, in other words, completely surrounds that part of the furnace which is known as the bosh. At its lower end this jacket has riveted thereto an angle-iron 11, which projects inwardly and serves as a support for a plurality of cooling-plates 12, which rest upon the bosh-jacket, being arranged side by side to completely surround the bosh-walls. The cooling-plates 12 are shown in detail in Fig. 3 and are preferably formed of a metallic casting having a pipe 13 cast therein. The plates are slightly tapering, being' larger at their upper ends, so that when placed side by side in the jacket 10 they form a complete sectional casing between the bosh walls and jacket. The cooling-plates may be cast hollow and water circulated therein in any desired manner; but for simplicity of construction the form illustrated is preferred. The several ends of the pipes 13 project through suitable openings at the bottom of the bosh-jacket, where they are suitably coupled up with each other or Water-supply pipes in any desired manner. The metal plate,

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being a good conductor, is maintained cool by the circulation of water therein, and the several plates being contiguous and forming a complete incasing wall for the bosh the walls of the latter will be maintained at a uniform temperature calculated to preserve them best without injuriously coolingv the stock in the furnace. Suitable taps may be provided to cut any one of the cooling-plates out of circulation, if desired.

By the construction shown we have provided cooling devices which can be constructed at small cost and which when applied will produce the most even and uniform cooling eect upon the whole bosh-wall. With our construction the temperature of vthe whole bosh-wall being maintained uniform it will expand and contract uniformly, thus greatly.

increasing the durability and life of the furnace `at this point over constructions where unequal expansion occurs. In usingour cooling devices the construction of the bosh and furnace itself is not varied from the present practice.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is-

. 1. In a furnace having a crucible, bosh, and stack, the combination therewith of a plurality of elongated cooling-plates each extending from crucible to stack and completely surrounding said bosh, an outer strengthening and retainingjacket completely surrounding said plates, and sections of pipe cast in said plates to provide for the circulation of a cooling medium therethrough.

2. In a furnace having a Crucible, bosh and stack, the combination therewith of a plurality of elongated tapering cooling-plates 'each extending from crucible to stack and completely surrounding said bosh, a jacket completely surrounding said plates and holding them in position, a section of pipe cast in said plates to provide for the circulation of water therethrough, and openings in the jacket through which the ends of said sections of pipe project for connection to water-mains.

3. In a furnace having afcrucible, bosh, and stack, the combination therewith of a plu-rality of elongated tapering cooling-plates each extending from Crucible to stack and completely surrounding said bosh, a jacket completely surrounding said plates and bosh, an angled plate carried by said jacket, on which said plates rest at their lower ends, and means to circulate a cooling medium through said plates.

In testimony whereof we have hereunto set our hands in presence of two subscribing wit- DGSSBS.

ERNEST DREYSPRING. JOHN J. SHANNON. JAMES .W. McOUNE. Witnesses:

NoMIE WELSH, R. D. J oHNs'roN, Jr.

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