US 1474261 A
Abstract available in
Claims available in
Description (OCR text may contain errors)
Nov. 13, 1923.
1,474,261 H. H. HOSACK POURING 0R TEEMING 0F MOLTEN STEEL OR METAL INTO INGOT OR LIKE MOLDS Filed March 22, 1925 3 Sheets-Sheet 1 Nov. 13, 1923. 1,474,261
H. H. HOSACK POURING OR TEEMING OF MOLTEN STEEL OR METAL INTO INGOT OR LIKE MOLDS Filed March 22. 1925 3 Sheets-Sheet 5 H- H. H0804)? Patented Nov. 13,1923.
HAROLD HERON HOSACK, OF FARNHAM, ENGLAND.
POURING R TEEMING- OF MOLTEN STEEL OR METAL INTO INGOT OR LIKE MOLDS.
Application filed March 22, 1923. Serial No. 626,915.
To all whom 2'2. may concern:
Be it known that I, HAROLD I'IERON Ho- SACK, a subject of the King of England, and residing at Farnham, in the county of Surrey, England, have invented improvements in or connected with the pouring or teeming of molten steel or metal into ingot or like molds, of which the following is a specification.
This invention has reference to pouring or teeming molten steel and other metals into molds, generally called ingot molds, and to that system of pouring or teeming where means are employed in connection with the mold, and inside same, for the diminution or obviation of splashing of the metal when poured into the mold from above, and thereby to diminish as far as possible, the oxidation of the metal, and other deteriorating efi'ects produced upon or in it, due to such splashing, and it also relates to that system wherein a tube or mold are moved in relation to each other; and the present invention has primarily for its object and effect to provide a method and means or mechanism by which the effects referred to, are accomplished simply and inexpensively, and one without mechanical parts which are capable of being reached by the metal from the ladle, or within the mold.
In the mode of efi'ecting the prevention of splashing, and means employed, hereinafter described, the improvements under this invention are comprised.
The mold or molds is or are moved upwards over a tube through which the metal is poured from the ladle, forming a cylin drical shield (preferably of as big a diametcr as convenient), which when the mold is up, will be surrounded by it, the lower end of this tube being then near the bottom of the mold; and in this position the nozzle of the ladle, which is not raised and lowered, is opened, and metal poured into the mold; and as the metal falls down'to the bottom its splashings are prevented from reaching the sides of the mold, being intercepted by'the tube. As the mold is filled, it is lowered say by a hydraulic raising and lowering ram, or other equivalent raising and lowering means, so that the bottom edge of the tube is slightly under or only just above the molten liquid surface; and then when the filling is complete, the mold or molds are lowered out of the way brick or the like, the upper portion being say surrounded with a metal cylinder, in whlch the fire brick is held.
In some cases, as in the case of large ingots being produced, the ingot mold may besupported directly on a ram head, or like elevating and lowering means, without a carriage or truck.
When a tundish is used with the tube, it recefves the metal from the ladle, and thereby breaks up the head, so that the metal is delivered down into the mold at a reduced and relatively small or smaller head.
In the accompanying drawings, Figure l is an elevation showing one arrangement of plan or apparatus under this invention; Figure 2 is a section showing a tundish distributing device used in the apparatus; and Figures 3 and 4 are section and side view showing the shield tube of the apparatus.
Figure shows a modified arrangement and manner of operating the apparatus.
In the drawings, 1 is the ladle, 2 arethe shield tubes, 3 is the tundish into which the ladle discharges, and by which liquid is distributed to the tubes 2. 4 are the ingots molds, and 5 is the hydraulic ram by which the ingot molds are lifted and lowered.
Referring to the arrangement shown in Figures 1 to 4, in this case the molds 4 are carried on a wheel truck or trolley 6, which in use is supported on a table 71 on the end of the piston 8 of the ram 5; and
in operating, the molds, say a pair of molds i, will be placed on each trolley 6, and run 011 the rails 9 (which may be. assumed to be in the bottom of a casting pit) on to the table 7 in succession, the main ladle 1 being in this case stationary.
The metal from the main ladle is tapped into the tunnel 10, on the top of the tundish 3, and it runs through a passage 11 of fire brick in the dish, and is discharged through two orifices into the upper open ends of the shield tubes 2, which arersuspended from the tundish casting by screws 12.
When the molds are brought into the correct position, held by any suitable known way on the ram table 7, they are raised by the ram, so that when in their upper posi metal cannot be sprayed on to the surface of the molds. I v
'VVhen the" molds are filled, and lowered below the ends of the tubes 2, the trolley 5 is moved off the ram table, and another one brought into position, and the operation is repeated.
The tubes 2 are preferably constructed as shown in Figures 3 and 4t, and are made in two parts, the upper part consisting of a metal tube lined with a fire resisting material, tubes or lining, and the lower part 2* being a fire'resisting material only, and provided with lugs 2 which pass into angle slots in the upper metal tube, and when turned round in bayonet joint manner, they are supported by the metal, in which they may be sealed by filling in the gaps of the slots not occupied by the lugs 2.
A telltale device is used in connection with the tubes 2, so that the position of the surface of the metal in relation to the lower edge 01" the tube part 2*, can be seen by the person in charge of the apparatus.
In the case shown this signal device con sists of a head 13 on a rod 1% outside the tube 2, supported freely or loosely in guide lugs 15 on the outside of the tube; whilst the lower end of the rod has a fire clay or brick body 16, which normally stands near the, lower edge of the tube part 2* as shown; and which, when dipping into the liquid, will float, and when floated will indicate by the upper head 13 that the body 16, and the lower edge or lip of the tube part 2*, is touching or in the liquid. The signal thus given will serve to enable the operator of therein to lower it at the required rate, namely, the rate at which the tube part 2* will just be dipping or sealed in the liquid in the mold durin the tcemi 11g operation. 7
In the modification shown in Figure 5, instead of the molds being run under the stationary ladle, the molds are stationary and the ladle is moved, and the hydraulic rain 5 by which the molds are raised, is carried on the carriage 18 on which the main ladle 1 is supported.
In this case, as each set oiinolds is filled, the lifting chains 19, which are operated by the rain 5, are disconnected from the lifting trunnions or connecting parts 20 or the molds 4t; and then the'ladle carriage 18, and parts carriedby it, are moved 'lift 13; and lowering operations being effecte by hydraulic means, the operation may be effected by hand or power winch, or in any suitable way.
What is claimed is 2'- 1. Means for pouring or teei'ning molten metal into ingot or like molds, comprising a stationary ladle, a stationary shield tube through which the metal from the ladle is adapted to fall, a mold adapted to be raised. over the tube and subsequently to be lowered in pouring; said shield tube having a detachable lower end.
2. Means for pouring or teeming molten metal into ingot or like molds, comprising a stationary ladle, a stationary shield tube through which the metal from the ladle is adapted to "fall, a mold adapted to be raised over the tube and subsequently to be lowered in pouring, and means for automatically indicating the relative positions of the bottom of the shield tube and the level 01" the metal in the mold as the metal is delivered to the mold. 3
h leans for pouring or teeming molten metal into ingotor like molds, comprising a stationary ladle and a stationary shield tube adapted to receive metal discharged or delivered from the ladle, and comprising a metal outer part, a lining of fire resisting material, and a detachable lower part of fire resisting material having a part adapted to engage with the lower edge of the aforesaid part; substantially as set "forth. 7
4t. Mea'ns ior pouring or teeming molten metal into ingot or like molds, comprising a stationary ladle and. a stations 5 shield tube adapted to receive metal discharged or delivered from the ladle, and comprising