US1890150A - Slag ladle and carrier - Google Patents

Description

- 1933 A. F. GlESE, JR A SLAG LADLE AND CARRIER.

Filed Jan. 7, 1952 3 Sheets-Sheet l [leg 6, M32. A. F. mass, JR

SLAG' LADLEI AND CARRIER 3 Sheets-Sheet 2 Filed Jan. 7, 1932 Dec. G, 1932. F, 31555 JR 1,890,150

SLAG' LADLE AND CARRIER Filed Jan. 7. 1932 3 Sheet-Sheet 3 Patented Dec. 6, 1932 UNITED STATES AUGUST I. GIISE, 33., F GARY, INDIANA SIIAGILADLEANDC Application filed January 7, 1932. Serial No. 585,209.

Heretofore slag ladles have been supported by four supports which are part of the ladle itself, which in turn rest on the bail which is part of the truck,and owing to the excessive heat to which they are subjected, the average life of a slag ladle is not more than nine months. Many costly methods of ribbing the ladle have been resorted to and many changes in the designs have been devised in an attempt to overcome these objections and difliculties, but it has been found that these have failed to lengthen the life of the ladle, this being due to making the ladle casting too rigid, and also to the unequal heating and cooling stresses set up in a heavily ribbed structure of this character.

Changing from cast iron to cast steel has also been tried in many places, but even this has not appreciably increased the life of the ladles, and as the blast furnaces of today are continually increasing in size, the output of slag which it is necessary to handle has also materially increased, resulting in the necessity of considerably increasing the size of the 2a ladle.

This aggravates the condition and the tendency of the ladle to crack at the supporting lugs, and larger ladles are required, and the life thereof is not any greater. Furthermore,

the loss of slag pots is practically twice as much as formerly, when small pots, slag ladles and small furnaces were in use.

All slag ladles start to crack at the supporting lugs which rest upon the bail of the carrivling truck and this is due to the constant c ange of temperature, and the great stresses set up at the lugs, due to the fact that the lower part thereof is in tension and the upper,

A part in compression.

Another condition which causes the slag ladle to crack, is that during approximately fifty per cent of the time the slag ladle is red hot, and during the remaining portion of the F time it is cold, such variations causing severe temperature changes that start the ladle to crack.

Furthermore, when the ladles are increased to twice their capacity, they become too top so heavy, and are hard to control when the ladle is being dumped.

thereof which keep In order to overcome these difficulties and objections, it is oneof the objects of the present invention to provide a type of air cooled carrier, the ribs on the ladle being dispensed. with, with the result that no weight will be used in the ribs, the additional weight being all located below the center of gravity, which will-tend to overcome the tendency of the ladle to be top heavy when filled.

-On a ladle from which the ribs are omitted, the casting will be more symmetrical and therefore more capable of overcoming stresses due to cooling and heating.

With such a structure, the carrier will remove all stresses due to carrying the ladle and. the slag from the ladle itself, as such stresses will be transferred to the carrier casting.

This carrier casting is able to withstand much greater stress thanthe metal of the ladle, because the carrier casting is very much W cooler, due to the fact that it does not come into contact with the liquid slag. The carrier is equipped with numerous ribs inside the slag ladle spaced from the carrier, and the spaces between the ribs and the carrier casting or receptacle are provided with cored holes between adj acent ribs, one of such holes being preferably adj acent the bottom and two preferably adjacent the top of the carrier castin between 30 adjacent ribs, for the purpose 0 cooling. The cold air entering through the bottom holes will 'flow' up between the ladle and carrier casting or receptacle, and will be discharged through the two holes adjacent the top, forcing the hot air between the ladle and carrier out of such space through the top holes, thereby keeping the ladle and carrier cool. no

With this improved carrier, a-much lighter ladle can be used, which will give approximately twice the length of service than when the slag ladle is supported on holding lugs which are supported on the bail of the truck, 5 the supporting lugs being omitted in the present invention. This improved carrier and ladle are so constructed that the weight of the ladle will be supported on its bottom, instead of near the top, which latter pulls J the ladle out of shape when it is full of v molten slag.

on line 33, Figure 1."

. ceptacle and resting upon a shouldered To the attainment of these ends and the accomplishment of other new and useful objects as will ap ear,'the invention consists in the features of novelty in substantially the "construction, combination and arrangement of the several parts hereinafter more fully described and claimed and shown in the accompanying drawings illustrating this invention, and in which Figure 1 is a view part1 ly in section and partly broken away, with parts omitted, of a truck having a carrier and ladle constructed in accordance with the principles of this invention,applied thereto.

Figure 2 is a top plan view of Figure 1, .With the ladle removed.

Figure 3 is a vertical sectional view taken in elevation, part- Figure 4 is a detail view partly in elevation, partly in section and partly broken away, of the ladle carrier or receptacle.

Referring more particularly to the drawings the numeral 10 designates generally the usual supporting truck of a slag ladle provided with a bail 11 supported at its ends as at 12, usual in devices of this character.

The numeral 13 designates generally a carrier which is in the form of an inverted conical receptacle to conform to the contour of the slag ladle 14, and this receptacle is supported by the bail'll, referably by means of a flange 15 encompassing the top of the re- 0rtion 16 of the bail. The receptacle is semi red in position in any desired or suitable manner and is so arranged that the top thereof will preferably be substantially flush with the top of the bail while the bottom .17 thereof is disposed in proximity to the body portion of the truck beneath the bail. Arranged within the receptacle or carrier are a plurality of ribs 18 which radiate from the central point of the bottom of the receptacle to the top thereof, and these ribs are spaced late ally from each other for any desired distance and according to the num ber of ribs which it is desired to provide. The ribs may be of any desired height according to the space which it is desired to produce between the outer periphery of the ladle 14 and the wall of the receptacle or carrier 13. Extending through the wall of the carrier and adjacent the bottom thereof are openings 19 of any desired diameter, and one of these openings is preferably arranged between each pair of ri s.

Similar openings 20 are also provided through the wall of the carrier or receptacle 13 adjacent the top thereof which may also be of any desired diameter and any number of these openings 20 may be provided between adjacent ribs. .In the present form of the invention one opening 19 is shown as .ing ribs heretofore two openings 20 are shown adjacent the top of the spaces between the adjacent ribs, 'and these openings serve as a means for inducing a circulation of air currents between the ribs and also between the wall of the receptacle or carrier and the outer wall of the ladle 14.

The ladle 14 is constructed without the provision of the reinforcing or strengthennecessary with ladles of this character, and the external diameters of the ladle are such that when the ladle is placed within the receptacle or carrier 13, the wall thereof will engage the edges of the ribs 18 so'that the outer periphery of the ladle will be spaced from the wall of the carrier or receptacle thereby forming air circulation spaces between adjacent ribs and between the wall of the carrier or receptacle and the ladle.

The ladle fits within the carrier or recepbottom of the air circulation spaces and the openings 20 at the top thereof, as well as the open ends of the spaces at the extremities of the ribs, air circulation currents will be induced through such spaces, the air passing in to the spaces through the opening 19 and flowing. out therefrom through the openings 20, and also through the open upper ends of fhglspaces, thereby effecting a cooling of the While the preferred form of the invention has been herein shown and described, it is to be understood that various changes may be made in the details of construction and in the combination and arrangement of the several parts, within 'the scope of the claims, without departing from the spirit of this invention.

What is claimed as new is 1. In combination, a slag ladle, a carrier for the ladle and from which carrier the ladle is freely removable, means for maintaining the ladle spaced from the carrier,

and means for inducing circulation of a cool'-' ing medium directly against the bottom of the ladle and' betweenthe carrier and the ladle.

' 2. In combination, a'sla-g and means'for supporting the ladle upon the truck andby the bottom of the ladle. In combination, a slag ladle, a truck, means for supporting the ladle upon the truck and by the bottom of the ladle, and means forming cooling air circulation passages between the lad e and its supporting ladle, a truck,

means.

4. In combmation, a slag ladle, a carrier for the ladle, said carrier being in the form of an open receptacle conforming to the contour of the ladle and into which receptacle the lower portion of the ladle fits, said ladle being supported upon its bottom, and means for cooling the bottom of the ladle.

5. In combination, a slag ladle, a carrier for the ladle, said carrier being in the form of an open receptacle conforming to the contour of the ladle and into which receptacle the lower portion of the ladle fits, said ladle being supported upon its bottom, and means for inducing circulation of a cooling air against the bottom of the ladle.

6. In combination, a slag ladle, a carrier for the ladle, said carrier being in the form of an open receptacle conforming to the contour of the ladle and into which receptacle the lower portion of the ladle fits, said ladle being supported upon its bottom, and means for inducing a circulation of cooling air between the bottom of the ladle and the wall of the said receptacle.

7 In combination, a slag ladle, a carrier for the ladle, said carrier being in the form of an open receptacle conforming to the contour of the ladle and into which receptacle the lower portion of the ladle fits, said ladle being supported upon its bottom. means for holding the ladle spaced from thewall of said receptacle, and means for inducing circulation of a cooling medium between the ladle and receptacle wall.

8. In combination, a slag ladle, a carrier for the ladle, said carrier being in the form of an open receptacle conforming to the contour of the ladle and into which receptacle the lower portion of the ladle fits, said ladle being supported upon its bottom, spacing ribs extending lengthwise of the wall of the receptacle and spaced laterally from each other and against which ribs the portion of the ladle within the receptacle rest, whereby the ladle will be spaced from the wall of the receptacle, and means for inducing circulation of a cooling medium through the spaces betweltlen the ribs and the ladle and receptacle wa 9. In combination, a slag ladle, a carrier for the ladle, said carrier being in the form of an open receptacle conforming to the c011- tour of the ladle and into which receptacle the lower portion of the ladle fits, said ladle being supported upon its bottom, and spacing ribs extending along the receptacle wall and laterally spaced from each other and against which ribs the ladle rests whereby the ladle will be maintained spaced from the receptacle wall, there being an opening through the receptacle walls between adjacent ribs in proximity to the bottom of the receptacle and there being one or more openings through the receptacle wall between adjacent ribs adjacent the top of the receptacle, whereby air circulation currents will be induced-- between the ribs and the ladle and receptacle wall.

10. In combination, a ladle carrier, said carrier being in the form of an open receptacle conforming to the contour of the ladle and into which receptacle the ladle fits, and means for maintaining a space between the ladle and the receptacle openings through the re-

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