US718313A - Blast-furnace. - Google Patents

Description

No. 718,313. PATENTED JAN. 13, 1903. W. 0. GOFFIN.

BLAST FURNACE.

, APPLICATION FILED MAY 24, 1901.

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APPLICATION FILED MAY 24, 1901.

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UNITED STATES AT FFI WILLIAM C. OOFFIN, OF PITTSBURG, PENNSYLVANIA.

BLAST-FU RNAC E.

SPECIFICATION formingpart of Letters Patent No. 718,313, dated January 13, 1903.

Serial No. 61,737. (No model.)

To all whom, it may concern:

Be it known that I, WILLIAM C. COFFIN, a citizen of the United States, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Blast-Furnaces, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to blast-furnaces,and more particularly to the walls of the hearth, bosh, and stock-room; and the primary object thereof is to so construct'said walls of metal as to relieve the brickwork or lining of the weight or load, also of the internal pressure, and this without impairing the efficiency of the furnace or retarding expansion and contraction to which the furnace-walls are necessarily subject.

The invention consists, primarily, of a vertical succession of horizontally-disposed wall members so arranged as to permit of independent expansion and contraction.

The invention consists,further, of a vertical succession of horizontal rings or bands spaced apart by interposed jackets for holding the cooling-plates, the rings, and jackets thus assembled, forming a vertically-continuous outer wall, which may start at the furnacebase or at the base of the bosh.

In the accompanying drawings, Figure 1 is an elevation, partly in section, of the lower portion of a furnace constructed in accordance with my invention. Fig. '2 is an enlarged vertical sectional View of a portion of the bosh-wall, and- Fig. 3 is a sectional plan view of the same. Fig. 4 illustrates a portion of a furnace-wall of modified construction.

Referring to the drawings, and particularly to the construction shown in Fig. l, the outer walls of the hearth, bush, and stock-room are formed of a vertical succession of horizontal rings or bands, which are spaced apart by the interposed cooling-plate jackets or holders 2. The rings or bands 3 of the hearth 4 are formed, preferably, of channel-bars, while for the bosh 5 the rings or bands 6 are formed of Z-bars. In continuing the metallic wall above mantle 7 for stock-room 8 I preferably employ channel-bar rings 9, similar to rings 3 of the hearth. If desired, this construction may be continuedto the top of the furnace.

-members, each consisting of a band or ring continuous around the furnace and the cooling-plate jackets secured thereto and .with each of said members capable of expansion and contraction independently of the other members.

In those portions of the furnace where the wall is vertical or substantially vertical the channel-bar rings are well adapted for the purpose. For the upwardly-increasing diameter of the bosh the Z-bar rings are preferably used, as the cross-sectional shape thereof constitutes steps which conform to the inclination of the wall. The channel-bar rings may, however, be employed in forming the inclined bosh-wall, as shown in Fig. 4. While I have here shown only channel and Z bar rings, the invention is in no sense limited .thereto, as bands of any other desired crosssection may be employed.

In the preferred embodiment of my invention the metallic structure, consisting of the bands and series of jackets arranged alternately, begins at the furnace-foundation, and the same may be erected before any of the lining or brickwork is put in place. As the life of the hearth-lining is materially prolonged by cooling, this construction permits of the introduction of cooling-plates into said wall. However, instead thereof the hearth may be inclosed by the vertical jacket 11, Fig. 4, provided at its upper end with the plate-ring 12, resting on brackets 13, secured to the inner face of jacket 11, and the sectional wall of bands and cooling plate-holding jackets may have its foundation thereon. As the improved outer metallic wall may be applied to the entire furnace or one or more parts only thereof, I do not limit myself in this regard and desire the expression outer wall of a blast-furnace occurring in the claims read with this understandin The twyers may be introduced through jackets 15, seated in the furnace-wall and overlapped by and riveted to the bands or rings 3 occurring in the plane thereof.

The jackets or holders 2 are slightly separated and formed with the parallel end surfaces 2, and in these intervening spaces a suit-able grouting 16 may be packed for preventing the escape of gases. The cooling or bosh plates 17 may be of any preferred construction. The opening in the back or vertical portion of each of jackets 2 is preferably beveled or tapered on all of its edges, and the outer end of the plate 17 is similarly formed, so that when introduced into said jacket-opening a very tight fit is effected. The plates are always accessible and may be easily inserted and removed.

A furnace-wall of the form here shown possesses all strength requisite for resisting strains incident to internal pressure, and at the same time, owing to the elasticity afforded by the unconnected wall members, the wall may contract and expand in amount sufficient to prevent injury to any part of the structure. The metallic outer wall relieves the refractory lining and the cooling-plates embedded therein of much of the weight and accompanying crushing tendency to which they are ordinarily subjected, as well as all strains laterally or radially.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. Outer-wall construction for blast-furnaces comprising horizontal wall members superposed and movable horizontally one upon the other, each of said members consisting of a ring and spacing elements.

2. Outer-wall construction for blast-furnaces comprising horizontal wall members looselysuperposed and movable horizontally one upon the other, said outer Wall having cooling-plate openings, and cooling-plates for said openings.

3. Outer-wall construction for blast-fun naces comprising horizontal vertically-shallow wall members loosely superposed and movable horizontally one upon the other, said outer wall having cooling-plate openings, and cooling-plates for said openings.

4-. The outer wall of a blast-furnace formed of separated rings or bands,and cooling-plateholding devices interposed between the bands or rings, said bands and plate-holding devices being superposed one upon the other and forming a vertically-continuous self-sustaining metallic wall.

5. The outer Wall ofa blast-furnace formed of a plurality of horizontal bands or rings and cooling-plate-holding devices interposed between the bands or rings, each of said devices being engaged by the bands or rings immediately above and below-the same and secured to one only of said bands or rings.

6. The outer wall of a blast-furnace composed of a plurality of horizontal bands or rings having flat top and bottom surfaces, and cooling-plate-holding devices interposed between the bands or rings and formed with fiat top and bottom faces which engage the corresponding faces of the adjacent rings or bands, thereby forming a vertically-continuous metallic wall.

7. The outer wall of a blast-furnace formed of a plurality of horizontal bands or rings, of cooling-plate-holding devices interposed between and engaging adjacent rings or bands, thereby forming a vertically-continuous metallic wall, and means for securing the said holding devices to the bands or rings upon which they rest.

8. The outer wall of a blast-furnace bosh composed of a plurality of horizontal bands or rings of Z form in cross-section, and coolingplate-holding devices interposed between adjacent rings and resting on the next adjacent under ring and supporting the ring next above.

9. In a blast-furnace, the combination of the hearth having an outer Wall consisting of horizontal bands or rings formed of channelbars, cooling plate holding devices in ten posed between adjacent bands or rings, the bosh having an outer wall sustained by the outer wall of the hearth, the bosh outer Wall being formed of a plurality of bands or rings formed of Z-bars, and cooling-plate-holding devices interposed between adjacent Z-bar rings, thereby forming a continuous metallic outer wall for the hearth and bosh.

10. In a blast-furnace, the hearth and bosh constructed with a vertically-continuous metallic outer wall, and the stock-room constructed with a vertically-continuous metallic outer wall, the said outer walls of the bosh and stock-room being formed of disconnected horizontal members superposed one upon the other and capable of individual expansion and contraction.

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

WILLIAM G. OOFFIN.

\Vitnesses:

J. M. NEsBIT, ALEX. S. MABoN.

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