Патент USA US2405363код для вставки
2,465,353 l.. B. LìNDEMuTl-a CHECKER FOR OPEN HEARTHREGENERATIVE FURNACES Filed March 29, 1944 '.5'l Sheets-Sheet 2 \\\ \ \\ \ \\ \ \"\\\\\ \ \\ \" / //l////l///// /// / / f/ / / mb l / l. . /// / z / f / // /// / l/ / /////// /////// /// // \\\\\\\\ /1 // . INVENTOR. WITNESSES. cà o. BY @___,v‘m m; ,1946. 1_. B. LINDEMUTH CHECKER FOR OPEN HEARTH REGENERÀTIVE FURNACES Filed March 29. 1944 3 Sheets-Sheet 3 // / /v / /f/ . .w .« / //f‘r/f AI/L ///////// // /? INVENTOR. - Patented Aug. 6, 1,946 2,405,363 ’ ‘ ÉÀTENT OFFICE ¿UNITED STATE 2,405,363 CHECKER FOR OPEN-HEARTH REGENERA TIVE FURNACES Lewis B. Lindemuth, Port Washington, N. Y., as sig‘nor to Steel Ingot Production, Inc., New York, N. Y., a corporation of Delaware Application March 29, 1944, Serial No. 528,524 3 Claims. (Cl. 263-51) 1 2 The invention relates to checkers for open. hearth regenerative furnaces, particularly thos used for making steel. ' In the operation of an open hearth steel fur nace much dirt and dust, including fine oxide I-beam. The horizontal joints of brick forming the columns in each vertical plane are vertically offsetfrom the horizontal joints of brick forming the columns in each adjacent plane so that ther mal lateral expansion of the brick will not move particles, is carried by the hot gases to the check the columns out of alignment and present dust ers, on horizontal portions of which a substan tial amount of the dust is deposited. Because of the character of the dust and the heat to which receiving ledges. This breaking of the joints is . preferably eiîected by using half brick or one and one-half brick at the bottoms'of the columns 1y it is subjected, deposits of it grow in sponge-like 10 ing in alternate vertical planes thereof and half fritted form and clog passages through the check bricks at the tops thereof or at the tops of the er. This makes it necessary to clean the check other columns. ers from time to time, which is diñicult to do To facilitate the laying of the columns, the hori except their tops. To clean the passages through zontal meeting faces of the brick are provided a checker to the limited extent that this can 15 with interlocking detents of a suitable form to be done, it is usually necessary temporarilyl to align brick vertically and also to restrain verti shut down the furnace. cally adjacent brick against movement with re ’ As usually constructed, the life of checkers has lation to each other. However, such detents are been approximately that of the open hearth steel preferably omitted from the brick forming the furnace with which they are associated, and the 20 tops of the columns, such brick having smooth tops so that they will not be engaged and moved checkers have been rebuilt when the furnace has been closed down for reconstruction. A recent by the cleaners or dust removers which from time development in the construction of open hearth to time are moved over the top of the checker. furnaces is the use of basic brick for their roofs The invention is illustrated in the accompany which has extended the lives of the furnaces three 25 ing drawings, of Which Fig. 1 is a horizontal sec or four times that of those having the usual silica tional view of a checker, the plane of view being brick roofs. An object of this invention is to indicated by the line I--I, Fig. 2; Fig. 2 a verti provide for such furnaces checkers Whose lives ‘ cal longitudinal sectional View taken on the'line will be that of the furnace so that it will be II-II, Fig. l; Fig. 3 a vertical transverse sectional unnecessary to close the furnace down for the 30 View taken on the line III-III, Fig. l; and Figs. purpose of rebuilding its checkers. 4 and 5 perspective views of full size and half size The invention provides for an open hearth re brick used in forming the checker. generative furnace a checker constructed of brick The checker is built within end walls l and that are so shaped and laid as to form a plurality 2, and sidewalls 3 and li, and has a bottoml 5 of Vertical flues which extend from the top to the 35 and a top E. The length of the checker between bottom of the checker in such a continuous fash its end walls I and 2, and its width between its ion as to have no horizontal ledges on which dust side walls 3 and t, as well as its height, may vary can deposit, except the top of the checker which according to the requirements of service. The can readily be cleaned from time to time with top of end Wall l is provided with a gas or an ` out interrupting the operation of the furnace. 40 air inlet l connecting with a furnace, which on The checker is constructed of brick laid in con reversal of the furnace becomes an outlet for tinuous vertical columns which are arranged in products of combustion, and end wall Z is pro parallel planes, the columns lying in each plane having their adjacent ends spaced from each other. 'I'he ends of columns lying in adjacent planes overlap each other so that a continuous vertical flue is formed between the ends'of a pair of adjacent columns lying in one vertical plane and the sides of two columns lying in adja cent vertical planes. While the flue-forming columns may be formed of plain brick, they are advantageously formed of brick having vertical ribs lat their ends, the prefered form of brick having two vertical ribs vided with a gas outlet 8 for products of com bustion which on reversal of the furnace becomes Extending longitudinally 45 a gas or an air inlet. of the checker and resting upon its bottom 5 there is a wall li) which is provided with cross fiues l l and whose upper portion supports the adjacent ends of arches I2 that are supported at their other ends by walls 3 and 4. Resting on the tops of these arches there are blocks I3 on whose upper faces flue-forming columns rest. Except for the top and bottom courses of some l columns in the checker, each column is formed at each of its ends so that itis shaped like an 55 of brick l5 of the I-beam shape shown particu 2,405,363 3 4 larly in Fig. 4, the brick having a flat main body of rectangular shape and being provided at both sides of each end With vertical ribs I1. The tops and is moved over the top of the checker. If the upper faces of the brick forming the tops of the columns were provided with detents, the move ment of the cleaning ytool would be liable to en and bottoms of the brick are provided with inter locking detents of suitable form which may be a gage the detents and move the upper courses of brick. This would throw the iiues out of align transverse groove I8 on the top and a transverse ment and present dust-forming ledges at places projection I9 on the bottom of each brick. The which are not readily accessible to cleaning. top brick of each column having a half brick at The columns lying in each vertical plane there its lower end may be the same as the brick i5 except that the upper face is plain, or it may 10 of being spaced at their ends from veach other, thermal expansion of the brick horizontally in be a half brick 2!! such as shown in Fig. 5. Brick the plane of the columns does not throw the col 20 is the same as the brick I5 except that it is umns out of alignment because each brick is free half the height and its top is plain, or in other to expand lengthwise. Expansion of the brick words, not provided with a groove. While various size brick I 5 may be used, a suitable full size 15 transversely of the checker is transmitted from one column to another through the vertical ribs brick may be 131/2 inches long, 6 inches high and at the end of the brick, but the staggering of the 2 inches thick throughout its main body, its end joints of the columns lying in alternate vertical ribs I'I extending one-half inch from the face of planes precludes such thermal expansion from the brick and each having a face 11/2 inches in Width. When brick of this size are used they form 20 throwing the columns out of alignment. According to the provisions of the patent stat flues that are e x lOl/2 inches in cross section. utes, I have explained the principle and operation By using brick of this form and thickness the of my invention, and have illustrated and de entire volume of the brick is elîectively used for scribed what I now consider to represent its best absorbing and giving off heat. embodiment. However, I desire to have it under The brick just explained are laid in vertical stood that, Within the scope of the appended columns arranged in parallel vertical planes, al claims, the invention may be practiced otherwise ternate planes thereof being indicated by the dot than specifically illustrated and described. and dash lines 25 and 26 on Figs. 1 and 3. The I claim: end ribs Il of the brick forming each column in 1. A checker for an open hearth regenerative cach vertical plane 25 overlie and contact with 30 furnace, comprising flat brick having lateral ribs the faces of the like ribs at the ends of the brick at their ends laid in continuous vertical columns forming the columns in each adjacent vertical arranged in parallel vertical planes with said plane Thus a continuous and uninterrupted ribs extending vertically, »the columns in each‘ said vertical flue 21 is formed between the adjacent plane having their adjacent ends spaced from ends of adjacent columns lying in one vertical each other and having said end ribs overlying plane and the sides of two columns lying in ad and contacting with those of the columns lying in jacent vertical planes. As shown in Figs. 2~ and 3, each adjacent plane to form a plurality of verti «there is a half brick 2li at the bottom of each cal smooth-Wall ñues extending continuously column lying in alternate vertical planes thereof, from the top to the bottom oi the checker, arches and a half brick 2B at the tops of such columns. below said columns extending at Vright angles to Th‘e other columns are formed of full size brick said vertical planes thereof, and blocks vresting l5, except that the top brick in each such column upon the tops of said arches and supporting the may be plain instead of being provided with a ribbed ends of said columns, said blocks having groove. ' bases of the same Width as the tops of said arches To eliminate dust-receiving ledges on the tops and having tops of the same widths as‘said ribs of the column supporting arches I2, the blocks I3 and having tapered sides between their bases that rest upon these arches have bases of the and column-supporting top. same width as th‘e arches and have tops the same Between the tops and bases of these blocks their 1 sides are tapered as shown in Fig. 2, the taper being so steep that dust Will not deposit on their faces. Also, to prevent dust from depositing upon the top of Wall I il between arches I2, tri angular-ly shaped blocks 3G are placed upon the top of this Wall, th'e base of such blocks being of the same Width as the thickness of Wall Ill. Thus from the top to the bottom of the checker the dues 2'! are continuous and their walls are free from horizontal dust-receiving ledges. Prefer ably there are no cross ilues connecting these vertical ilues. Because of the interlocking `detents IS and IS formed on the horizontal faces of the brick, the columns may readily be laid with unskilled help, and in the upper courses of the columns these interlocking detents restrain the brick against moving longitudinally with relation to each other when a cleaning tool is moved over the top of the checker for removing dust deposited on it. As is well known, cleaning tools for this purpose are ' 2. A checker for an open hearth regenerative width as ribs I'I of the column-forming brick. furnace, comprising bricks laid in continuous ver tical columns arranged in parallel vertical planes, the columns in each said plane having their ad jacent ends spaced from each other and having at their ends vertical sides that are parallel to said vertical planes, said vertical sides of each column overlapping the like sides at the ends of columns in each adjacent plane to formv a, plu rality of vertical flues extending continuously from the top to the bottom of the checker, each column forming said iiues being free thermally to expand and contract laterally in the direction of said vertical plane in which it lies, the hori zontal joints of the bricks forming the columns in each said vertical plane being vertically offset from the horizontal joints of the bricks forming the columns in each adjacent plane, the tops of the columns being smooth and lying in a hori zontal plane, and the horizontal meeting faces of the bricks that constitute each‘ column being pro 70 vided with interlocking detents aligning the bricks vertically and restraining vertically adja usually formed of pipes, each having a laterally cent bricks against lateral movements with rela extending perforated head for discharging on the tion to each other. .' top of the checker compressed air led through the 3. A checker for an open hearth regenerative pipe. The cleaning h'ead of the tool rests upon 75 furnace, comprising flat bricks having lateral 2,405,363 5 ¿ ribs at their ends laid in continuous vertical col umns arranged in parallel vertical planes with said ribs extending in vertical alignment at the ends of each column and h'aving their side faces lying in planes parallel to said vertical planes, the columns lying in each said vertical plane having their adjacent ends spaced from each other and having said side faces of said ribs overlapping -the like faces of the ribs at the ends of columns in each adjacent plane to form a, plurality of verti cal ñues extending continuously from the top to, the bottom of the ch'ecker, each column forming said iiues being free thermally to expand and con 6 ltract laterally in the direction `of said vertical plane in which it lies, the horizontal joints of the bricks forming the columns in each said vertical plane being vertically oiïset from the horizontal joints of the bricks forming the columns in each' adjacent plane, the tops of the columns being smooth and lying in a horizontal plane, and the horizontal meeting faces of the bricks that cón stitute each column being provided with inter locking detents aligning the bricks vertically and restraining vertically adjacent bricks against lat eral movements with relation to each oth'er. LEWIS B. LINDEMUTH.