US1279037A - Ingot-mold for the manufacture of steel. - Google Patents

Description

EENJMN TALBOT, 0F MIBQDDLESBiROUGI-I, ENGLAND.

INGOTMOLD FCR THE MANUFACTURE 0F STEEL.

meneer.

Specification of Letters Patent.

Application mea Merch 13, 191s, serial No. 222,182.

To all whom t maly concern.'

Be it known that I, BENJAMIN TALBOT, a subject ofthe King of Great Britain, residing in Middlesbrough, England, have invented ertain new and useful Improvements in lngot-Molds for the Manufacture of Steel, of `ivhich the following is a specification.

This invention relates to an improvement in ingotimolde used in the A:rnainitaeture'of steel, whereby an improvement is also brought about in the steel itself east' in such improved mold. f

It is known that in that fern-i of ingot mold known as brick topped mold the steel ingot east in same will have the piped and segregated area located almost entirely in the to part of theingot which is surrounded iiyfthe interior brieked lining, so' that the mam part of the ingot below the bricked part is thereby improved inquality.

` tions of ingot, molds top to the/mold, further liquid d0' till In a large works,however, the hrieking and keepingin repair 'of the brick topped seebecomes a serious item, as such briclted topped ingotv mold will only run a few /heats without requiring renewal of the bricked portion. Moreover, unless very special care isialcen in brie-king, the joints of the bricks prevent the ready stripping of `the ingot, l

In lieu of having a brick toppedniold it has beeri proposed to place au annular iron receptacle on top of the mold, and before or directly after casting to fill .the annular Space `0r chamber with 'liquid slagr or other suitable heated'body, such for instance as Sand, to. about the level oi the molten metal upon thel top or' which, or upon a metal slag or sand is run. ln this proposed arrangement Imuch of the'upper portion ot the ingoia is in contact `with metal and 'notl with the slag'. or brick work, and the piping;r is removed only to' a limited extent While aooording to the present invention the above drawbacks are re1noved,-aml at, the sainetinie an appreciable improvement in the position oi the piped cavity in the inggot itneltia secured,- e oued Waste which lends to bring about a `in the erop discard obtained after rolling.

According to this invention, instead of lining the upper partei" ihe ingot mold with bricks or raiimied ganister, l take an ingo() mold, recessed inthe upper portion, and

after arranging inside xsurh inold a-'suitable core, preferably of iron. supported-troni the upper part ot' the ingot niold and fittingl Patenten sepa i7, wie.

closely into the interior ot' the mold atfthef4 point where the recessed part ot' the niol'd commences, l run molten slag into the space thus formed between the recessed Vwalls of the mold and the central core, When the slag has set, l release the interior oore,I and allow it to fall, thereby leaving the in'got. mold with the upper recessed portion Alined with the slag for any required depth and thickness. It the taper on the core permits,

.it can of course be withdrawn. ,from the top after the slag has set., bui in either event the eore is removed before the metal is east. The slag I always prefer to use lis blast furnat-e slag, not too high in lune, butgrood results can be obtained from the slag obi tained from the open-hearth.furnace itself especially from :leid open-hearth furnaces. The ingot molds, with the central core Vheld in position may be conveniently run on ycars under the slag spout attheblast furnace "i plant, or the Slag maybe stored in a yliquid condition in a heated receptacle.

In steel works, which have not a supply of suitable liquid slag available, the invention may be carried out, by casting or mold- Y ing from the solid Vslag a top of dimensions suitable to fit inl'olho recess in' the' ingot, mold and surh Casting: may be either in one piece or in suitable sections, and una be placed when cold into position in the ingot mold. To strengthen the slag casting, steel turningrs or other form of iron or Steel can be introduced into'the mass during casting.

In rases in which lliesteel ingot is east withfthe larger end oi the ingot upyierniost' it is always preferable i'or the slug" iend to be separate from lthe mold, so that the head ran bepulled of? the top of the ingot., so as to enable the ingot to be readily withdrawn from the mold.

One-,of the advantugeh due to the use` of this slapr top is that a .small quantity of the slagf liipielied from the face of the slagl topltliis liquid slag floats on the top oi' the slieelfainl time causes the steelV to remain liquid in the center and the segregation of the impurities sueii as Sulfur and phosphorus (and carbon) to 'ne brought nearer lOO te the actual top eilt' the steel ingot, thus decreasing the area of the" segregated portion and localizing this segregated area into one plate to the m spot where 1t can be means. v

vIn order to bring about a still greater differentiat'ion of heat between the slag top portion of the ingot and the portion sur; rounded only b the'iron mold a thick` cover old may be provided and `made treated by suitable 7 -f preferably of blast furnace or otherislag'clast 4is of circular cross section. 20:-

into which recess molten slag is pouredwhen ,Separately.: This slag cover slightly melts owing to the heat of the steel,\and tends to ke'e the slag mold in good condit1on.

he accompanying drawings illustrate examples-of molds according toithe invention.

the core is in osition', o'1 a1caster molded top may be provi `ed to fit the recess as explained above.' E is a-metal cover plate and F an opening through which liquid slag can be introduced. into the recess C. The lower yend of the core B fits in the inside ofthe case slightly below the enlarged top D. The core is supported by bars placed through holesg G provided in the corevand resting on the to of themold.

laving thus described 'the nature of the j said 'invention and the best means I know of carrymg thefsame into practical effect, I

[claim '1;' An ot mold comprising an iron casing; com 'inationwitha removable central core with relationto 'which said vcasing is lspaced to-formachannel around said core, and a lining of. slag in said channel.

2. A11 ingot moldcomprising an iron casing having an enlarged `top, in combination with a removable central core with relation l v to'whichsaid enlarged top is spaced to form a channel around said core, and a lining of l.Slag in said channel.

3'. lAn ingot mold comprising fan iron casing, in, combination wlth a -removable centl'al vcore with relatlon to which saldcasing is spaced to form a channel of approximately 'I rectangular crossse'ction around said core,

Iand a lining of slag in said channel.

In witness whereof I have signed my name to this specification in the presence ofv two Subscribing witnesses.

Witnesses:

A C. S. HOPKINS, f W. I. Skawmw BENJAMIN-TALBOT. y f

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