US 866312 A
Description (OCR text may contain errors)
.PATENTEDSEPT. 17, 1907.
H. SBIDLER. BLAST PURNAGB TWYER; APPLICATION FILED HAY 19, 1906.
Till-"mulls PETERS ca WASHINGTON. n. 1:.
UNITED STATES PATENT OFFICE.
Specification of Letters Patent.
Patented Sept. 17, 1907.
- Application filed May 19,1906. Serial No. 317,785.
To all whom it may concern:
Be it known that I, HENRY SnrnLnn, a citizen of the United States,residing at Great Falls, in the county of Cascade and State of Montana, have invented certain new and useful Improvements in Blast-Furnace Twyers, of which the following is a specification.
This invention appertains to twyers for furnaces requiring a blast in order to insure proper performance of the required work.
Twyers, as ordinarily constructed and applied to furnaces for smelting ore, frequently become choked and as a result considerable time is required to remove the slag as well as necessitating the expenditure of much energy and causing great annoyance and vexation. Moreover, the twyers, as generally provided, are not punched or cleaned as frequently as might be, because of the inconvenience and annoyances experienced by the attendant in having the dust, loose stuff and the like blown into the face or in close proximity thereto.
The invention is particularly adapted for twyers designed for smelting furnaces in which slag accumulates and frequently rises to such a level as to enter the twyer and choke or otherwise interfere with the free operation thereof.
In accordance with the present invention the twyer is provided with an automatic outlet whichis normally closed and which closure is destroyed by contact of slag or other material coming in contact therewith, whereby the surplus material or overflow finds a ready escape, thereby preventing choking of the twyer and at the same time apprising the attendant of the condition of the twyer. v
For a full description of the invention and the merits thereof and also to acquire aJmowledge of the details of construction of the means for effecting the result,
reference is to be had to the following description and accompanying drawings, in which Figure 1 is a detail view of a portion of a smelting furnace provided with a twyer embodying the invention, said twyer being in longitudinal section and having its outlet closed. Fig. 2 is a view of the parts shown in Fig. 1 illustrating the automatic escape of the slag or overflow.
Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.
The twyer is adapted to be applied to any furnace or used wherever a blast is required, but its advantages are best appreciated when the twyer is adapted to a smelting furnace'in which slag accumulates or the material is adapted to rise so as to overflow the blast inlets k The furnace 1 is preferably of the smelting type and is provided with abla'st inlet 2 which is registered with the twyer 3, the latter being bolted or otherwise attached to the furnace to admit of its ready removal for any purpose.
The twyer 3 is provided at one end with an opening 2 registering with the blast inlet 2 of the furnace and the body of the twyer flares as shown from the opening 2 and is provided at its rear with three nipple extensions 4, 4 and 4 The nipple extension 4 is designed as a blast pipe connection to which the blast pipe 5 is connected. The nipple t extends rearwardly in a direct line with the upper horizontal wall of the twyer body and in direct horizontal alinement with the open ing 2 and substantially of the same diameter of the said opening, and is flanged at its upper end to receive thereon the flanged cap 6 which is formed witha tubular extension 6' surrounding an opening 7 in direct alinement with the center of the opening 2*. The opening 7 is designed to receive a rod when it is necessary to punch the furnace or loosen the material collecting about the blast inlet 2. The remaining nipple 4 projects rearwardly beyond the nipple 4' as shown and is in direct alinement with the opening 2 but slants downwardly therefrom and forms a practical continuation of the lower downwardly slanting wall 8 of the twyer body so as to produce the slag escape-way 8. This escape-way is adapted to quickly convey the slag or overflow to the outlet 9 of the nipple 4 said outlet being under normal conditions covered by means of a closure 10 of such nature as to be destroyed by the molten slag or overflow coming into contact therewith. The closure 10 may consist of a disk of lead or other material which will easily fuse and is retained in place by the flanged cap or clamp ring 11 which engages with the flange on the outer end of the said nipple. The clamp ring or cap 11, it will be seen, is, like the cap 6, provided with a tubular extension 11, formed with an opening extending therethrough, so that a rod may also be inserted in this opening in lieu of the opening 7 after the closure 10 has once been destroyed by the molten slag or even before its destruction, if desired. It is also to be noted that the nipple 4 is, like the nipple 4, of substantially the same diameter as the opening 2 at the furnace end of the twyer body and is also in alinement therewith, it being readily seen that a line drawn through the opening in the tubular extension 11 of the cap 11 will intersect the opening 2 just as a line drawn through the opening 7 will intersect said opening 2 Hence, it is manifest that a rod may be inserted directly through the opening in the extension 11 and thrust straight into the furnace opening 2, if desired. It is also to be noted that the nipple 4" projects rearwardly to a greater extent than the nipple 4, to a sufficient degree that the caps 6 and 11 will never interfere with each other when being removed or attached in place although they are so close together as to produce a compact construction. All the nipples incline towards the opening 2, the nipples 4 and 4" being directly in line with said opening,
while the nipple 4 preferably extends at right-angles to the nipple 4 as clearly illustrated in the drawing. It is also to be noted that the nipple 4 at which the fusible plug or closure 10 is located, extends farthest to the rear of all of said nipples, and beyond the blast pipe connection and a considerable distance from the furnace crucible. Hence the lower pipe or slag escape-way is carried out far enough, so that when one of the twyers fills up with slag it burns away the fusible disk at the endof the slag escape-way, permitting the molten slag to run from the twyer. This stream of escaping slag falls entirely clear of the furnace crucible, and does not burn out, by reflected heat, the fusible disks in neighboring twyers, that do not happen to be themselves filling with slag.
Having thus described the invention, what is claimed as new is:
A blast furnace twyer consisting of a hollow body provided at one end with an opening adapted to be registered with the blast inlet of the furnace, said body flaring away from said opening and provided at its rear end with an upper, intermediate and lower nipple, the upper nipple being arranged for the attachment thereto of a blast pipe,
and pointing away from said opening, the middle nipple projecting rearwardly at the rear or beyond the upper nipple with its upper wall in line with the upper wall of the remaining portion of the body and the opening through said nipple being of substantially the same diameter and in direct alinement with the opening at the furnace end of said body, and the lower nipple slanting downwardly and rearwardly from the opening at the furnace end of the body, the opening in said last named nipple being substantially of the same diameter as -th-esaid opening in the body and being in alinement therewith, said lower nipple projecting rearwardly and located beyond the upper and middle nipples, caps secured on the ends of the middle and lower nipples, each of said caps being provided with an opening extending therethrough and said opening being located in a plane or line which intersects the opening at the furnace end of the twyer body, and a fusible closure clamped between the cap of the lower nipple and said nipple, as and for the purpose HENRY SEIDLER. [L. 3,]
E. .T. HOLLAND, I. B. ARMSTRONG.