JP2014077168A - Refractory block for forming molten metal passage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refractory block for a forming molten metal passage that solves the problem of erosion of a connecting joint between refractory blocks and that improves the durability of a molten metal passage (molten iron trough or slag trough) constituted by using refractory blocks.SOLUTION: In refractory blocks 10b, 10b, and so on having a bottom part and both side parts in which a channel type molten metal passage is formed by arranging the plurality of blocks in a column state, each refractory block 10b is constituted of two or more of sub-blocks 101b and 102b, or sub-blocks 103b and 104b, that are divided into a plurality to left sides and right sides with respect to the direction of molten metal flowing through the molten metal passage and in which case a dividing position of the sub-blocks is determined such that connecting faces between the respective sub-blocks do not align in a straight line among the refractory blocks 10b, 10b, and so on, which are arranged adjacently in series, and occupy discontinuous positions.

Description

  The present invention relates to a refractory block having a bottom portion and both side portions that form a groove-like molten metal passage by arranging a plurality of rows in a row, which can be used to form a molten iron, a roll, etc. is there.

  Conventionally, a hot metal or slag that flows from a blast furnace, such as high-temperature hot metal or slag (NORO), is constructed by pouring a fluid castable material in the field, or refractory bricks, etc. A large number of refractory blocks (precast blocks) are arranged and built on site.

  Patent Document 1 below discloses a hot metal in which the bottom surface of the outflow groove passage through which the hot metal flows is formed of an alumina-spinel precast block.

JP 2007-246960 A

  Among the above, the former method of forming hot metal by pouring castable materials (so-called amorphous refractories, refractory cements, etc.) is not necessarily durable, and it has a rectangular parallelepiped shape by firing beforehand. In the latter method of constructing the molten iron by combining the refractory blocks having a shape in which the molten metal passage is formed, there is a problem that melting damage occurs intensively at the joint joint between the refractory blocks.

  Therefore, the object of the present invention is to solve the problem of melting damage at the joints between the refractory blocks, and to form a molten metal passage (molten metal, molten steel, non-ferrous iron, work iron, roll iron, etc.) using the refractory block. ) To improve durability.

  In order to solve the above-mentioned problem, in the present invention, a refractory block having a bottom part and both side parts forming a groove-like melt passage by arranging a plurality of rows in a row, wherein the melt flows in the melt passage. The joint surfaces of the sub-blocks facing the molten metal passage are aligned in a straight line between the adjacent refractory blocks arranged in series. A configuration is adopted in which the division positions of the sub-blocks are determined so as to occupy discontinuous positions.

  Alternatively, further, the second refractory block is configured such that the sub-blocks constituting the first refractory block are arranged in a first posture with respect to a direction in which the molten metal flows through the molten metal passage and are adjacent to the first refractory block. The first and second refractory blocks are melted when the sub-blocks constituting the object block are arranged in a second posture that is 180 ° reversed from the first posture with respect to the direction in which the molten metal flows in the molten metal passage. Each of the above-mentioned sub-blocks facing the molten metal passage occupy discontinuous positions without being aligned in a straight line between the adjacent refractory blocks arranged in series while constituting a passage. A configuration in which the sub-block division positions are defined is adopted.

  Alternatively, the joining surfaces of the sub-blocks that are joined together to form one refractory block are inclined with respect to the direction in which the molten metal flows in the molten metal passage and face the molten metal passage. In the sub-block in which the end surface of each sub-block facing the surface is arranged on the downstream side of the joining surface, the sub-block forms an obtuse angle with respect to the molten metal passage bottom surface of the sub-block, and is arranged on the upstream side of the joining surface Then, the joining surfaces of the sub-blocks that are formed so as to form an acute angle with respect to the molten metal passage bottom surface of the sub-block and that face the molten metal passage are aligned in a straight line between adjacent refractory blocks arranged in series. A configuration is adopted in which the division positions of the sub-blocks are determined so as to occupy discontinuous positions without being aligned.

  Here, the refractory block includes all the refractory blocks having a function as a molten metal passage and the refractory block conventionally used for the molten metal passage, such as a fired one and a non-fired one.

  According to the above configuration, when the molten metal passage is formed by arranging a plurality of refractory blocks composed of sub-blocks divided into a left and a right in the molten metal passage in a row, the molten metal passage is formed along the molten metal passage. Regarding the direction, the joint joints between the sub-blocks are arranged so as to occupy discontinuous positions without being aligned in a straight line between adjacent refractory blocks arranged in series. The problem that the structure near the joint is melted can be avoided, and the durability of the molten metal passage can be improved.

  Alternatively, further, the second refractory block is configured such that the sub-blocks constituting the first refractory block are arranged in a first posture with respect to a direction in which the molten metal flows through the molten metal passage and are adjacent to the first refractory block. The first and second refractory blocks are melted when the sub-blocks constituting the object block are arranged in a second posture that is 180 ° reversed from the first posture with respect to the direction in which the molten metal flows in the molten metal passage. Each of the above-mentioned sub-blocks facing the molten metal passage occupy discontinuous positions without being aligned in a straight line between the adjacent refractory blocks arranged in series while constituting a passage. According to the configuration in which the sub-block division positions are determined, the type or number of sub-blocks necessary to form the molten metal passage can be reduced, and the molten metal passage can be provided. It can be greatly reduced cost.

  Alternatively, the joining surfaces of the sub-blocks that are joined together to form one refractory block are inclined with respect to the direction in which the molten metal flows in the molten metal passage and face the molten metal passage. In the sub-block in which the end surface of each sub-block facing the surface is arranged on the downstream side of the joining surface, the sub-block forms an obtuse angle with respect to the molten metal passage bottom surface of the sub-block, and is arranged on the upstream side of the joining surface Then, the joining surfaces of the sub-blocks that are formed so as to form an acute angle with respect to the molten metal passage bottom surface of the sub-block and that face the molten metal passage are aligned in a straight line between adjacent refractory blocks arranged in series. According to the configuration in which the division positions of the sub-blocks are determined so as to occupy discontinuous positions without being aligned, the sub-units constituting one refractory block are configured. The joint surface between the blocks is inclined so that the joint surface is tilted downstream in the direction of the molten metal flowing through the molten metal passage. From a hydrodynamic viewpoint, negative pressure tends to be generated at the joint joint between the sub blocks. The molten metal pressure acting on each part of the refractory block in the vicinity of the joint joint (or the irregular refractory buried in the joint) is reduced, and the joint joint between the sub-blocks constituting the refractory block is melted. And the durability of the molten metal passage can be improved.

It is the perspective view which showed the refractory block for molten metal channel | path formation which employ | adopted this invention. It is sectional drawing which showed the construction structural example of the hot metal or Noro iron using a refractory block. It is the top view which showed the joining structural example of the refractory block for molten metal channel | path formation which employ | adopted this invention. It is the top view which showed the example of different joining structures of the refractory block for molten metal channel | path formation which employ | adopted this invention. It is explanatory drawing which showed the example of joining structure from which the refractory block for molten metal channel | path formation which employ | adopted this invention differs. It is explanatory drawing which showed the example of a further different joining structure of the refractory block for molten metal channel | path formation which employ | adopted this invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail based on examples shown in the drawings.

  FIG. 1 shows a basic structure of a refractory block for forming a molten metal passage employing the present invention. FIG. 1 shows two refractory blocks having the same structure, which are used to form a groove-shaped molten metal passage by arranging a plurality of them in a row, in order to show a joint structure.

  1, reference numeral 10 denotes a refractory block formed in advance from a plurality of refractory materials by a technique such as sintering. The refractory blocks 10, 10 (...) In FIG. Is formed into a shape that can be continuously arranged in series. As will be described later, the refractory blocks 10, 10 (...) Having a bottom portion and both side portions are further composed of sub-blocks 101, 102, 103, 104.

  The material and the forming method of the refractory blocks 10, 10 (...) are arbitrary, and it is possible to employ known materials and methods that have been used for constructing refractory bricks conventionally used for hot metal. .

  The refractory blocks 10, 10 (...) In FIG. 1 have an overall shape in which a groove-like molten metal passage is provided in the upper part of a rectangular parallelepiped block shape, and each of the sub-blocks 101 is formed by a technique such as sintering. 102, 103, 104, etc., and when these sub-blocks 101, 102, 103, 104,... Are assembled and joined, they have a shape having a bottom and both sides so as to surround the grooved molten metal passage.

  The inner wall and the outer wall of the left and right side portions of the refractory block 10 in FIG. 1 are parallel to each other and are upright from the bottom surface. In the figure, the arrow F indicates the direction in which the molten metal flows, and the upstream end surface 11 and the downstream end surface 12 face each other with respect to the molten metal flowing direction F as indicated by the thick arrow in the center of the drawing. By joining the sub-blocks 101, 102, 103, 104... Of the refractory blocks 10, 10,... Continuously in series, a bowl-like structure can be constructed as a whole. At this time, an amorphous refractory (such as refractory cement) is embedded in the joint joint between the sub-blocks 101, 102, 103, 104 of the refractory blocks 10, 10,... And the joint joint between the upstream end face and the downstream end face. Then, the sub-blocks 101 and 102, 103 and 104, and the refractory blocks 10 and 10 are fixed.

  The refractory blocks 10, 10 (...) of FIG. 1 have a shape in which the bottom of the groove-shaped molten metal passage and the inner surfaces of both sides are substantially U-shaped, especially the corners where the bottom and the inner surfaces of both sides meet. Although the portion has a cylindrical surface shape, the shape of this portion is arbitrary, and may be, for example, a polygonal cross section. Also, the overall shape may be arbitrarily modified by those skilled in the art, for example, by forming a chamfered portion as indicated by reference numerals C3 to C6 for the refractory block 10 on the front side.

  The refractory blocks 10 and 10 in FIG. 1 are further divided into sub-blocks as indicated by reference numerals 101, 102, 103, and 104.

  According to the structure in which the groove-shaped molten metal passage is formed in the upper part of the block as described above, it may be easy to construct the molten iron on site, but on the other hand, the bottom forming the groove-shaped molten metal passage and A refractory block having both sides has a complicated cross-sectional shape, which may be disadvantageous in terms of spalling resistance when forming a relatively large hot metal.

  Therefore, by dividing the refractory blocks 10 and 10 into sub-blocks 101, 102, 103, and 104 as shown in FIG. 1, the shape of each member can be simplified and the spalling resistance can be improved. it can.

  When dividing the refractory blocks 10 and 10 into the sub-blocks 101 and 102 or 103 and 104, for example, if only the spalling resistance is considered, any division position that meets the condition may be adopted.

  Further, the same division position for all the refractory blocks 10 and 10 may be employed, for example, a division position that divides the refractory blocks 10 and 10 evenly at the center position of the molten metal passage. In the refractory blocks 10 and 10 that are continuously arranged in series, joint joints between the left and right sub-blocks are aligned on a straight line. In such a structure, there is an imbalance in the flow velocity of the molten metal in the molten metal passage between the portion along the joint and the other portion, for example, the flow velocity in the vicinity of the joint of the sub-block is increased at the other portion. There is a possibility that the structure near the joint joint of the sub-block will be melted down as the downstream of the passage.

  Therefore, in the refractory blocks 10 and 10 of FIG. 1, when each block is divided into sub-blocks 101 and 102, or 103 and 104, the joint surfaces of the sub-blocks are adjacent to each other in series. The division positions of the sub-blocks 101 and 102 or 103 and 104 are determined so as to occupy discontinuous positions without being aligned on a straight line.

  In the example of the refractory blocks 10 and 10 shown in FIG. And 102, 103, and 104 are taken. The division positions of the refractory blocks 10 and 10 are examples, and can be arbitrarily changed by those skilled in the art. In that case, in short, the refractories in which the joint surfaces of the sub-blocks are arranged adjacently in series. The division positions of the sub-blocks 101 and 102 or 103 and 104 may be determined so that the blocks occupy discontinuous positions without being aligned on a straight line.

  FIG. 3A shows a state in which the refractory blocks 10 and 10 that have undergone sub-block division as shown in FIG. 1 are continuously arranged in series.

  The thick line in FIG. 3 (a) is continuously arranged in series in the direction of the molten metal passage (hereinafter also referred to as a molten metal flow path), joints between the refractory blocks 10, 10. This corresponds to the joint joint of each of the sub-blocks 101, 102, 103, and 104 constituting.

  In particular, for each of the sub-blocks 101, 102, 103, 104, as is apparent from the arrangement pattern of the joint joints S1, S2, S1,... However, joint joint patterns arranged in a zigzag pattern so as to occupy discontinuous positions without being aligned in a straight line between adjacent refractory blocks arranged in series are formed.

  Thus, with respect to the direction along the molten metal flow path, the joining surfaces of the sub-blocks are staggered so as to occupy discontinuous positions without being aligned in a straight line between the adjacent refractory blocks arranged in series. Forming an aligned joint joint pattern avoids the problem that the structure near the joint joint of the sub-block melts down as the flow velocity near the joint joint of the sub-block increases at other parts. The durability of the molten metal passage can be improved.

  FIG. 2A is a construction example of a molten metal passage (molten metal) configured using the refractory block 10 composed of the sub-blocks 101, 102, 103, and 104 as shown in FIG. ) Shows a transverse cross section of the molten metal passage (molten metal).

  2A is a cross-sectional view of a portion of the refractory block 10 made up of the sub-blocks 101 and 102. Reference numerals S1 and S2 denote joint joints (solid lines) between the sub-blocks 101 and 102, as in FIG. Shows the position of the joint joint (broken line) between the sub-blocks 103 and 104 of the refractory block 10 adjacent on the near side or the back side of the refractory, and the joint surfaces of the sub-blocks are adjacently arranged in series. It can be seen that the blocks are arranged so as to occupy discontinuous positions without being aligned on a straight line.

  In the structure of FIG. 2A, a plurality of refractory blocks 100 that are arranged and joined in series in the direction perpendicular to the paper surface are held by a bowl-shaped iron skin 50, and are placed below the refractory block 10 portion. Is provided with a refractory block 40 for reinforcement or position restriction. A plurality of refractory blocks 40, for example, in the shape of a flat plate, are arranged in a row like the refractory block 10. Refractory blocks 10, 10... In the iron shell 50, sub-blocks 101, 102, 103, 104 and refractory blocks 40 constituting the refractory blocks 10 are embedded with indeterminate refractories (such as refractory cement). They are fixed.

  The refractory block 10 shown in FIG. 1, FIG. 2 (a), and FIG. 3 (a) has a shape in which the inner surface of the bottom and both sides is substantially U-shaped, and its entire shape in the width direction. It is composed of sub-blocks 101 and 102 or 103 and 104 that are divided at positions that are vertically cut from the left and right ends, respectively. In the present invention, the refractory block has a groove shape. If the molten metal passage is composed of two or more sub-blocks that are divided into a plurality of left and right sides with respect to the direction in which the molten metal flows, the refractory is formed. The overall shape of the object block, the division position into sub-blocks, the posture of the divided cross section, and the like are arbitrary and may be arbitrarily changed by those skilled in the art.

  FIG. 2B is a construction example of a molten metal passage (molten metal) configured using a refractory block 10a having a different shape and sub-block division structure according to the present invention, and FIG. ) Shows a cross section in the width direction of the molten metal passage (molten metal) in the same manner as in FIG.

  2 (b) is different from the refractory blocks 10, 10 ... shown in FIGS. 1, 2 (a) and 3 (a) in the molten metal passage (molten metal). ) In the transverse cross section in the width direction and the form of division into sub-blocks (division position and posture of the divided cross section), the direction in which the molten metal passage extends is the same as that of the refractory blocks 10, 10.

  That is, the refractory block 10a (10a...) In FIG. 2B is a wall portion having a substantially parallelogram-shaped cross section inclined on both the left and right sides in the overall shape, and extends one inner wall as it is. The cross section is divided into sub-blocks. For example, the illustrated cross-section is a cross-section of the refractory block 10a made up of the sub-blocks 101a and 102a, and reference numeral S3 is a position where these sub-blocks 101a and 102a are divided (or their positions). Joints).

  Further, a division position of sub-blocks (sub-blocks 103a and 104a in FIG. 3B below) of the refractory block 10a disposed adjacent to the illustrated refractory block 10a on the front side or the back side of the sheet ( Alternatively, the joint joint may be symmetrical with respect to the division position (or joint joint) S3 of the sub-blocks 101a and 102a as indicated by reference numeral S4, for example.

  FIG. 2 (b) shows an example of construction structure with different molten metal passages (molten metal) at the same time, and the molten metal passage (molten metal) in FIG. 2 (b) is inside the trench 60 excavated in a bowl shape on site. A plurality of refractory blocks 10a (10a,...) Are arranged in series, and each block is embedded using a ballast 70, an irregular refractory 80 or the like while being joined.

  2 (a) and 2 (b) does not constitute the present invention, and is merely an example, and the refractory block 10 or 10a (or a refractory block described later). For the structure 10b), any construction structure shown in FIGS. 2 (a) and 2 (b) may be used.

  FIG. 3 (b) shows a state in which the refractory blocks 10a, 10a (...) Shown in FIG. 2 (b) are continuously arranged in series in the same format as FIG. 3 (a). The thick lines in FIG. 3 (b) are arranged in series continuously in the molten metal flow path direction, the joints of the refractory blocks 10a, 10a... To be joined, and the sub-blocks 101a constituting the refractory blocks 10a, 10a. It corresponds to the joint joint of 102a, 103a, 104a.

  Here, as is apparent from the arrangement pattern of the joint joints S3, S4, S3... Of each of the sub blocks 101a, 102a, 103a, 104a in FIG. 3B, the sub block division as shown in FIG. The joint joint pattern arranged in a zigzag pattern so as to occupy discontinuous positions without being aligned in a straight line between the refractory blocks arranged in series adjacent to each other even when the sub-blocks are connected. It can be seen that it will be formed.

  And also in the structure which performs sub-block division | segmentation like FIG.2 (b) and FIG.3 (b), the joint surface of each subblock is on a straight line between the refractory blocks arrange | positioned adjacently in series. A joint joint pattern arranged in a staggered pattern to occupy discontinuous positions without being aligned will be formed, for example, the flow velocity near the joint joint of the sub-block becomes faster at other parts, etc. It is possible to avoid the problem that the structure near the joint joint of the sub-block is melted down as it goes downstream, and the durability of the molten metal passage can be improved.

  In addition, in the above, the division | segmentation position divided | segmented into the subblock of a refractory block, or the joint joint of the subblocks which comprise a refractory block took the example taken in parallel with the direction (melt flow direction) where a molten metal channel | path extends. Although shown, this direction does not necessarily have to be parallel to the direction in which the molten metal passage extends (the direction in which the molten metal flows).

  For example, FIG. 4 (a) shows a state in which refractory blocks 10b, 10b,... Are continuously arranged in series in the same manner as FIGS.

  The refractory blocks 10b, 10b,... In FIG. 4 (a) are divided sections (or joint joints of the sub blocks) that divide the refractory blocks 10, 10 ... shown in FIG. 1 into sub blocks 101, 102, 103, 104. ) S1 and S2 are not parallel to the molten metal passage, but are inclined obliquely so that the joint joint appears diagonally across the bottom surface of the molten metal passage as indicated by reference numerals S5 and S6.

  In the example of FIG. 4 (a), as shown by reference numerals S5, S6,..., The divided sections of the sub-blocks 101b and 102b and 103b and 104b constituting the refractory blocks 10b, 10b. The sub-blocks 101b and 102b and the joint joints 103b and 104b appear so as to obliquely cross the bottom surface of the molten metal passage.

  However, in the example of FIG. 4A, the divided cross sections of the sub-blocks 101b and 102b and the sub-blocks 103b and 104b are the same as those of the sub-blocks 101 and 102 and the sub-blocks 103 and 104 in FIG. It shall be taken perpendicular to the bottom of the passage.

  Further, in adjacent refractory blocks 10b, 10b, the joint blocks S5 and S6 of the sub-blocks 101b and 102b and 103b and 104b constituting them are inclined in different directions, and such sub-block division is performed. The joint joint pattern arranged in a zigzag pattern so that the joint surfaces of the sub-blocks occupy discontinuous positions without being aligned in a straight line between the adjacent refractory blocks arranged in series. It can be formed, and the same effect as described above can be expected.

  The example of FIG. 5 is an example of a coupling structure that can be used when the above-described sub-blocks (or refractory blocks arranged in series) are coupled.

  In FIG. 5, 101 and 102 are used as reference numerals for the sub-blocks as an example, and the joint surfaces of the sub-blocks 101 and 102 shown in FIG. A groove 102m is formed. The navel 101t and the groove 102m can be integrally formed when the sub-blocks 101 and 102 are sintered.

  By providing the umbilicus 101t and the groove 102m as shown in FIG. 5 on the joint surface, the sub-blocks 101 and 102 can be more firmly coupled. The coupling structure shown in FIG. 5 may be provided on the joint surface between the sub-blocks indicated by the reference numerals other than 101 and 102 described above, and the arrangement position and number of the navel 101t and the groove 102m, the arrangement pattern Etc. are arbitrary. Further, the connection structure shown in FIG. 5 may be used not only for a connection structure between sub-blocks but also for a connection structure between refractory blocks having the above-described structures.

  In addition, although the structure which divides | segments one refractory block into two subblocks was shown above, the division | segmentation number which divides a refractory block into subblocks may be three or more, in that case However, if the sub-block division position is determined so that the joint surfaces of the sub-blocks occupy discontinuous positions without being aligned in a straight line between adjacent refractory blocks arranged in series Needless to say, the same effect as described above can be expected.

  Now, considering the shapes of the sub-blocks 101 and 102 and 103 and 104 or 101a and 102a and 103a and 104a constituting the refractory block 10 and 10a shown in FIGS. It can be seen that the shapes of these sub-blocks are such that they can be formed even if the end faces (for example, 11 and 12 in FIG. 1) arranged upstream and downstream of the molten metal flow path are replaced.

  For example, the sub-blocks 101 and 102 in FIG. 1 have a posture (first posture) in which the end surface 11 is disposed on the upstream side and the end surface 12 is disposed on the downstream side. It can be seen that the sub-blocks 101 and 102 become sub-blocks equivalent to the sub-blocks 103 and 104 in the figure if the 11 is arranged in a 180 ° inverted posture (second posture) so as to face the downstream side.

  Therefore, in FIG. 1, for convenience, the four sub-blocks denoted by reference numerals 101 to 104 are illustrated. However, in practice, it is not necessary to prepare the four blocks as parts, and one set of sub-blocks 101 and 102 is divided. If only a refractory block is prepared and arranged in a posture that is inverted 180 ° so that the upstream side and the downstream side are alternately reversed by adjacent refractory blocks, the molten metal passage shown in FIG. 1 can be configured.

  In that case, the joint surfaces of the sub-blocks 10 facing the molten metal passage occupy discontinuous positions without being aligned in a straight line between the adjacent refractory blocks 10 arranged in series. The dividing position may be determined, but this condition is, for example, a configuration in which the joint joints of the sub-blocks 101 and 102 facing the bottom surface of the molten metal passage are substantially parallel to the flowing direction F of the molten metal as shown in FIG. Is established as long as the division positions of the sub-blocks 101 and 102 constituting the refractory block 10 are taken at positions other than the positions where the refractory block 10 is divided symmetrically in the horizontal cross section of the molten metal flow path.

  The above description is similarly applied to the sub-blocks 101a, 102a, 103a, and 104a constituting the refractory block 10a shown in FIGS. 2 (b) and 3 (b).

  That is, in the refractory blocks 10 and 10a shown in FIGS. 1 to 3, the sub-block (101, 102 or 101a, 102a) constituting the first refractory block (10, 10a) flows through the molten metal passage. A sub-block (101, 102 or 101a) constituting a second refractory block (10, 10a) arranged in a first orientation with respect to the direction and arranged adjacent to the first refractory block (10, 10a) , 102a) are arranged in a second posture that is 180 ° reversed from the first posture with respect to the flow direction of the molten metal in the molten metal passage, the first and second refractory blocks (10, 10 to 10a, 10a) Constitutes the molten metal passage, and the joint surfaces of the sub-blocks (101, 102 or 101a, 102a) facing the molten metal passage are adjacently arranged in series. Division position of each sub-block to occupy discrete positions without aligned on a straight line in the refractory block to each other is defined to be, it comes to.

  By adopting such a configuration, the molten metal passage shown in FIGS. 1 to 3 can be constructed by preparing a large number of refractory blocks 10 consisting of only two sub-blocks 101 and 102 (or 101a and 102a). Yes, the types of sub-blocks to be prepared can be reduced, and the construction cost of the molten metal passage can be greatly reduced.

  Note that the relationship between the shapes of the sub-blocks 101b and 103b, 102b and 104b in FIG. 4A is a mirror image on the left and right, and the sub-block 101b (or 102b) moves the sub-block relative to the direction of the molten metal flow path. Even if it is turned 180 °, it does not have the same shape as the sub-block 10 3b (or 10 4b). In the case of the sub-blocks 101b, 102b, 103b, and 104b in FIG. 4A, the arrangement of the joining surfaces of the sub-blocks is alternately reversed in the adjacent refractory blocks 10b and 10b at the bottom of the molten metal flow path. Since the sub-blocks are divided so as to face, at least four parts of the sub-blocks 101b, 102b, 103b, and 104b are required to realize the block arrangement as shown in FIG.

  However, it is also conceivable to adopt a block arrangement as shown in FIG. 4B using only the refractory block 10b composed of the sub-blocks 101b and 102b. That is, the molten metal flow paths in FIG. 4B are arranged so that the sub-blocks 101b and 102b are arranged in a posture that is alternately inverted by 180 ° with respect to the direction of the molten metal flow paths in the adjacent refractory blocks 10b, 10b. In FIG. 4B, the symbol S5 (solid line) in FIG. 4B is formed by sub-blocks 101b and 102b which are arranged in a posture in which the adjacent refractory blocks 10b, 10b... The position of the joint joint is shown.

  And in order to implement this invention, even if it is arrangement | positioning like FIG.4 (b), the joining surface of the subblocks 10b which face a molten metal channel | path is adjacent with the refractory blocks 10b, 10b ... arrange | positioned in series. The division positions of the sub-blocks 101 and 102 may be determined so as to occupy discontinuous positions without being aligned on a straight line. However, the sub-blocks 101b and 102b in FIG. In the configuration where the joint joint faces the channel bottom surface, this condition can be satisfied even if the sub-blocks 101b and 102b are symmetrical. For example, the broken line S5 ′ in FIG. 4B shows different division positions (joint joints) of the sub-blocks 101b and 102b, and the center of each refractory block 10b indicated by a black circle in the figure. Therefore, the sub-blocks 101b and 102b have a shape obtained by dividing the refractory block 10b symmetrically with respect to the left and right (points), and the sub-block division positions (joint joints) are in this way. In the configuration facing the bottom surface of the flow path, the joining surfaces of the sub-blocks 10b facing the molten metal passage are not aligned in a straight line between the refractory blocks 10b, 10b,. An arrangement that occupies a continuous position can be created.

  As described above, the first refractory block (10b) is configured even in the configuration in which the division positions (joint joints) of the sub-blocks 101b and 102b face the bottom surface of the flow channel as shown in FIG. 4B. The sub-blocks (101b, 102b) are arranged in the first posture with respect to the direction of the molten metal flowing through the molten metal passage, and the second refractory block (10b) arranged adjacent to the first refractory block (10b). When the sub-blocks (101b, 102b) constituting the first refractory block (10b, 10b, 102b, 102b) are arranged in a second posture that is 180 ° reversed from the first posture in the direction in which the molten metal flows. 10b) constitutes the molten metal passage, and the joint surfaces of the sub-blocks (101b, 102b) facing the molten metal passage are adjacent to each other in the same series as the refractory block. Thus, it is possible to establish a structure in which the division position of each sub-block is determined so as to occupy a discontinuous position without being aligned in a straight line, and a refractory block 10b consisting of only two sub-blocks 101b and 102b is formed. If a large number are prepared, construction is possible, and the type or number of sub-blocks required to form the molten metal passage can be reduced, and the construction cost of the molten metal passage can be greatly reduced.

  1 to 4, the sub-block 101 constituting the refractory blocks 10 and 10b except for the refractory block 10a shown in FIGS. 2B and 3B. , 102, 103, 104 and sub-blocks 101 b, 102 b, 103 b, 104 b, for example, divide the refractory block 10 (10b is the same) perpendicular to the molten metal flow path bottom as shown in FIG. I have explained.

  However, as shown in FIG. 6 in particular, in a configuration where the division positions (joint joints) of the sub-blocks 101c, 102c, 103c, and 104c are inclined to the bottom surface of the flow path, the divided cross-sections of the sub-blocks (between the sub-blocks) It is conceivable to adopt a configuration in which the (joint surface) is inclined, and in this configuration, it is possible to expect a specific effect.

  FIG. 6 shows refractory blocks 10c, 10c comprised of sub-blocks 101c, 102c and 103c, 104c in the same manner as FIG. The symbols C3 to C6 in FIG. 6 are examples of chamfer shapes that can be adopted by those skilled in the art, as in FIG. 1, and the meanings of other identical reference symbols are almost the same as those in FIG. A duplicate description will be omitted.

  In FIG. 6, division positions (joint joints) S7 and S8 of the sub-blocks 101c, 102c, 103c, and 104c face the bottom surface of the flow path, and this state is, for example, as shown in FIG. Although it is substantially the same, in FIG. 6, in the subblocks 101c and 102c, and the subblocks 103c and 104c, the end surface which faces the joint surface of the subblocks which comprise the same refractory block is inclined.

  Here, as long as the joints S7 and S8 of the sub-blocks 101c, 102c, 103c, and 104c face the bottom surface of the flow path, the sub-blocks 101c and 102c or 103c constituting the same refractory block 10c are faced. And 104c, a relationship between the upstream side and the downstream side is created with the joint surface between the sub-blocks as a boundary. In the example of FIG. 6, the sub-blocks 101c and 103c are located downstream of the sub-blocks 102c and 104c, respectively. ing.

  In the configuration of FIG. 6, the inclination angle of the end face facing the joint surface between the sub-blocks 101c and 102c or the sub-blocks 103c and 104c constituting the same one refractory block is the upstream side or the downstream side of the sub-block. It is determined by what.

  That is, in FIG. 6, the sub-block 101c in which the end faces of the sub-blocks facing the joint surfaces of the sub-blocks 101c and 102c and the sub-blocks 103c and 104c are arranged downstream of the joint surfaces of the sub-blocks. And 103c form an obtuse angle O with respect to the molten metal passage bottom surface of the sub-block, and the sub-blocks 102c and 104c arranged upstream of the joint surface form an acute angle A with respect to the molten metal passage bottom surface of the sub-block. Is formed.

  In addition, when the molten metal channel | path bottom face comprises a substantially planar shape here, the relationship between the obtuse angle O and the acute angle A should just satisfy the relationship of O + A = 180 degrees naturally. In FIG. 6, for the sake of convenience, the obtuse angle O and the acute angle A formed by the end faces of the sub-blocks 101c and 103c and the sub-blocks 102c and 104c facing the sub-block joining surface with respect to the molten metal passage bottom surface of the sub-block are Although it is schematically illustrated as an angle appearing on the upstream end face of the refractory block 10c, it is assumed that it is precisely an angle measured in a vertical plane perpendicular to the straight line of the joint joints S7 and S8.

  In short, the configuration of FIG. 6 is such that the joining surfaces of the sub-blocks (101c and 102c and 103c and 104c) that are joined together to form one refractory block (10c, 10c) flow in the molten metal passage. In the sub-block (101c, 103c) in which the end face of each sub-block facing the molten metal passage inclined to F and facing the joint surface (S7, S8) between the sub-blocks is arranged downstream of the joint surface An obtuse angle (O) is formed with respect to the bottom surface of the molten metal passage of the sub block, and the sub block (102c, 104c) arranged on the upstream side of the joint surface has an acute angle (A) with respect to the bottom surface of the molten metal passage of the sub block. The refractory blocks (10c, 10c), which are formed so as to be formed and the joint surfaces of the sub-blocks facing the molten metal passage are adjacently arranged in series, In which the dividing position of each sub-block to occupy a discrete position without alignment on a straight line is defined.

  In such a configuration, the joint surfaces of the sub-blocks 101c and 102c and the sub-blocks 103c and 104c are joined to the downstream side in the direction F in which the melt flows in the melt passage as shown in the figure. In view of hydrodynamics, negative pressure tends to be generated at the joints S7 and S8 between the sub-blocks 101c and 102c and the sub-blocks 103c and 104c. , The pressure of the molten metal acting on each part of the refractory block in the vicinity of S8 (or the irregular refractory buried in the joint) is reduced, and the sub blocks 101c and 102c constituting the refractory blocks 10c and 10c, and the sub It is possible to reduce the melting loss of the joint joint between the blocks 103c and 104c, and to improve the durability of the molten metal passage. You can.

  In the configuration shown in FIG. 6, the sub-blocks 101c and 103c are located on the downstream side of the joint surface between the sub-blocks constituting one refractory block 10c, and the sub-blocks 102c and 104c are one refractory block 10c. Therefore, the molten metal passage cannot be arranged in a posture reversed by 180 ° from the illustrated state with respect to the direction in which the molten metal flows, for example, Even if the sub-blocks 101c and 102c are arranged in a posture reversed by 180 ° from the state shown in the drawing with respect to the molten metal passage, the shape does not become the same as that of the sub-blocks 103c and 104c. Therefore, in the configuration of FIG. 6, it is necessary to prepare at least four sub-blocks 101c, 102c, 103c, and 104c as parts.

  The present invention can be applied in various ways to hot metal flowing high temperature molten iron discharged from a blast furnace, non-flow iron flowing noro (slag) discharged from a blast furnace, and the like.

10 Refractory Block 40 Refractory Block 50 Iron Skin 60 Trench 70 Ballast 80 Amorphous Refractory 101, 102, 103, 104 Subblock 101a, 102a, 103a, 104a Subblock 101b, 102b, 103b, 104b Subblock 101c, 102c 103c, 104c Sub-block 102t Umbilical 102m Groove

Claims (3)

A refractory block having a bottom portion and both side portions forming a groove-like melt passage by arranging a plurality of rows in a row,
The molten metal passage is composed of two or more sub-blocks divided into a plurality of left and right directions with respect to the flowing direction of the molten metal,
The division positions of the sub-blocks are determined so that the joint surfaces of the sub-blocks facing the molten metal passage occupy discontinuous positions without being aligned in a straight line between the adjacent refractory blocks arranged in series. A refractory block for forming a molten metal passage.   2. The refractory block according to claim 1, wherein the sub-blocks constituting the first refractory block are arranged in a first posture with respect to a direction in which the molten metal flows through the molten metal passage, and are adjacent to the first refractory block. The first and second sub-blocks constituting the second refractory block arranged in the second refractory block are arranged in a second posture that is 180 ° reversed from the first posture with respect to a direction in which the molten metal flows in the molten metal passage. The second refractory block constitutes a molten metal passage, and the joining surfaces of the sub-blocks facing the molten metal passage are not aligned in a straight line between adjacent refractory blocks arranged in series. The refractory block for forming a molten metal passage is characterized in that a division position of each sub-block is determined so as to occupy a continuous position.   2. The refractory block according to claim 1, wherein joint surfaces of sub-blocks joined to each other and constituting one refractory block are inclined with respect to a direction in which the molten metal flows and face the molten metal passage. In addition, the end face of each sub-block facing the joining surface between the sub-blocks forms an obtuse angle with respect to the bottom surface of the molten metal passage in the sub-block arranged on the downstream side of the joining surface, and The sub-blocks arranged on the upstream side are formed so as to form an acute angle with respect to the bottom surface of the molten metal passage of the sub-block, and the joint surfaces of the sub-blocks facing the molten metal passage are adjacently arranged in series. The division position of each of the sub-blocks is determined so that the refractory blocks occupy discontinuous positions without being aligned on a straight line. Road forming refractory block.

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