Патент USA US3096183код для вставки
July 2, 1963 T. H. KENNEDY 3,096,173 METHOD FOR MAKING scram. BY OXYGEN BLOWING Filed Feb. 29. 1960 2 Sheets-Sheet 1 mi July 2, 1963 3,096,173 'r. H. KENNEDY METHOD FOR MAKING STEEL BY OXYGEN BLOWING 2 Sheets-Sheet 2 Filed Feb. 29. 1960 \ \\ \ \ \ \ \ \ \\ \\ \ I '--,I’ mag?IE mv%vI?‘ INVENTOR TRUMAN H. KENNEDY 5)’ 191422;” Affarney United States Patent 0 ” rice 3,096,173 Patented July 2, 1963 2 1 ing 26 adjacent the upper end. The opening 26 is con nected by a ?exible conduit 28 to a source of cooling water. The tube 22 is closed at both ends with an outlet 3,096,173 METHOD FOR MAKING STEEL BY OXYGEN BLOWING Truman H. Kennedy, Pittsburgh, Pa., assign‘or to United States Steel Corporation, a corporation of New Jersey Filed Feb. 29, 1960, Ser. No. 11,538 1 Claim. (Cl. 75-60) 30 adjacent its upper end. The outlet 30 is connected by means of a ?exible conduit 32 to a drain. Water passes from the conduit 28 to the space between tubes 18 and 20 to the lower end of the lance'16, returns in the space between tubes 20 and 22 and is discharged through out let 30 and conduit 32. A plate 34 is welded to the out This invention relates to a method and apparatus for making steel by oxygen blowing and more particularly for 10 side of tube 22 adjacent the outlet 30. An opening 36 is provided through the wall of the vessel 2 and an adapter making steel in a Bessemer converter in which the charge 38 is welded to the shell of the vessel around the opening includes molten iron. In the usual Bessemer converter, 36. A ?ange plate 40 having a tube 42 welded thereto air is delivered through the bottom of the converter. Steel and studs 44 attached thereto is secured to the adapter 38 has also been produced in a converter by blowing air or oxygen across the surface of the bath and also by blowing 15 in any desired manner, such as by means of capscrews, oxygen generally vertically downwardly on the bath. It is to this latter type of blowing that the present invention relates. Installations for this type of blowing ordinarily require the use of exceptionally long lances and compli cated mechanisms for raising and lowering the lance in 20 and out of the vessel at the start and ?nish of the blow. The distance between the nozzle and the charge is critical when introducing oxygen and in prior practice the adjust with the tube 42 extending inwardly through opening 36 and with the studs 44 extending outwardly. Openings 46 are provided in the plate 34 for receiving the studs 44. Nuts 48 are threaded on studs 44 on opposite sides of the plate 34 and hold the lance 16 in adjusted position. The operation of the converter is as follows: The extension of the lance 16 into the vessel 2 is ad justed to that desired by loosening nuts 48 and moving the plate 34 with the lance 16 thereon to the desired easily controlled nor determined. The intense heat gen 25 position, after which the nuts 48 are tightened against plate 34. The position of the end of the lance is deter erated during the blow also burnt away the end of the mined by the size of the charge, the oxygen pressure and lance, thus making adjustment more difficult and also re various other factors which may change from time to sulted in frequent failures. time and may vary from plant to plant. Once positioned It is therefore an object of my invention to provide a converter in which the lance is positioned in the side wall 30 the lance remains in adjusted position unless the con ditions change. The vessel 2 is rotated to the full line of the vessel with the axis of the lance being substantially ment of the lance and its relation to the bath was not vertical during the blow. Another object is to provide such apparatus in which the height of the lance above the bath may be adjusted position shown in FIGURE 5 and the vessel charged through opening 4. The charge will be of usual type for this process and in all instances will include molten iron. 35 In addition, scrap and/or other materials may be added. during the blow. A further object is to provide a method of making steel from a charge including molten iron wherein the oxygen is best utilized without damaging the oxygen lance. These and other objects will be more apparent after The vessel 2 is then rotated about its horizontal axis to the blowing position shown in FIGURE 2. In this posi tion the axis of the lance 16 is preferably vertical, as shown, but at ‘any rate is ‘substantially vertical. It is referring to the following speci?cation and attached draw 4.0 preferred that the axis of the oxygen lance be at an angle no greater than 15° to the vertical during the blow. ings, in which: With the vessel ‘so positioned oxygen is supplied to the FIGURE 1 is an elevation of the converter; lance 16 and impinges against the bath. After the FIGURE 2 is a view, partly in section, showing the charge ignites it is desirable that the distance between converter positioned for blowing; the lance and the bath be increased so that there will FIGURE 3 is a view taken on the line 1I'lI—III of be greater diffusion of the oxygen. This is accomplished FIGURE 2; by rotating the vessel 2 about its axis. During the blow FIGURE 4 is an enlarged sectional view of the oxygen the conditions may be such that it will be desired to lance; and change the distance between the lance and the bath for FIGURE 5 is an elevation, with parts broken away, 50 other reasons. This also may be done by rotating the showing the converter in two different positions. vessel 2 about the axis of the trunnion to either raise or Referring more particularly to the drawings reference lower the level of the bath. For best results the oxygen numeral 2 indicates a Bessemer converter having the usual from the lance should impinge on the middle third of opening 4 at one end thereof. Vessel 2 is provided with the bath. The position shown in the drawings is partic a lining 6. Trunm'ons 8 mount the vessel 2 for move ment about a generally horizontal axis. The vessel is 55 ularly desirable. After the blow is completed and the oxygen shut off the vessel 2 is rotated about the axis of rotated by a motor 10 through gearing 12 connected to the trunnion to discharge the molten steel therefrom in trunnion shaft 14. The interior of the vessel is preferably the usual manner. shaped as shown ‘with a ?at bottom and is generally cir While one embodiment of my invention has been shown cular in cross section. It is a necessary feature of my in vention that the shape be such that the level of the hot 60 and described, it will be apparent that other adaptations and modi?cations may be made without departing from metal in the vessel will vary as the vessel rotates about its the scope of the following claim. trunnion axis. This may include many different shapes I claim: as will be apparent, but it would not include the shape The method of making steel from a charge including where the vessel interior is spherical in that portion con taining the molten bath. Also, according to my invention 65 molten iron in a vessel mounted for movement about a generally horizontal axis and having a charging opening an oxygen lance 16 is provided through the side wall of at one end and an oxygen lance extending through the the vessel 2. As best shown in FIGURE 4 the lance 16 wall thereof, which method comprises charging the vessel includes concentrically mounted tubes 18, 20 and 22 pref through said opening, rotating said vessel about its axis erably made of copper. The tube 18 is open at its lower end and its outer end is connected by a ?exible conduit 70 to raise the level of molten metal, then delivering oxygen 24 to an oxygen source, not shown. Tube 20 is open at its lower end, but closed at its upper end with an open through said lance generally vertically downwardly on the surface of said bath, continuing ilow of oxygen with the 3,096,173 3 A. vessel remaining in its last mentioned position until the charge ignites, then rotating said vessel to increase the ' ‘ 5 Rttttttttt Cttttt it tht ?tt tt ttit ttttttt UNITED STATES PATENTS 1737,57? I Burrow _______________ __ Sept. 1, 1903 . 784,956 Morat _______________ __ Mar. 14, 1905 10 , Kootz et a1 ___________ __ Dec. 24, 1957 Boynton _____________ __ May 12, 1959, 1,030,375 Germany ___- _________ __ May 22, 1958 3135333‘ $1221 3223 ""3113" E23‘ i3’ 13%? distance between said metal and lance, shutting o? said oxygen ?ow, and then rotating said vessel to discharge molten steeltherefmm- t 2,817,584 2,886,308 FOREIGN PATENTS I O HER REFEREN T 7 1 CES Journal of Metals, pp. 742-753, June 1956.