Hot-blast stove connecting pipe and connecting pipe port combined brick replacement construction method

Abstract

The invention provides a hot blast stove connecting pipe and a connecting pipe port combination brick replacement construction method. The construction method comprises the steps that damaged original connecting pipe pipeline bricks are dismantled; building pipeline bricks of the connecting pipe; the damaged connecting pipe port combined bricks are dismantled; the method comprises the following steps: placing combined bricks on an arch mold in a dry manner for pre-building, drawing lines on exposed bricks, processing the bricks according to the lines, performing accurate grinding processing and pre-placing on door closing bricks according to a door closing space and a relationship between adjacent bricks, building in sequence, gradually driving the door closing bricks from a contact pipe side to a heat storage chamber side, and supplementing fireclay on brick surfaces; therefore, building of the connecting pipe port combined bricks is completed. According to the method, details of each step are analyzed, and research is carried out after integration in combination with previous similar construction experience, so that safe and efficient maintenance and replacement of the connecting pipe and the connecting pipe port combined bricks are realized.

Description

Technical Field

[0001] The present invention relates to the technical field of hot blast stove maintenance, and in particular to a construction method for replacing a hot blast stove connecting pipe and connecting pipe port combined bricks. Background Art

[0002] The construction of refractory materials for hot blast furnaces is a core process in major renovations, reconstructions, and demolition projects. The quality of the refractory construction significantly impacts the furnace's service life and even the furnace's performance. Furthermore, the high temperatures of hot blast furnaces place increasingly stringent demands on the quality and detailed construction of the refractory materials. The dome connecting pipe is a crucial component connecting the regenerator and combustion chamber of a hot blast furnace. The dome connecting pipe, along with the port bricks and other key components, is susceptible to damage during operation, requiring repair.

[0003] Key areas for hot blast furnace repair include the connecting pipes (top and bottom), connecting pipe end bricks, branch pipes, and checker bricks. The connecting pipes and their end bricks are the most challenging to repair, especially when both require simultaneous replacement. Therefore, a safe and efficient solution for localized refractory replacement in key hot blast furnace locations is urgently needed. This solution addresses the difficulty of replacing connecting pipes and end bricks, ensuring smooth construction and ensuring quality. Summary of the Invention

[0004] In view of this, the present invention proposes a construction method for replacing the connecting pipe and the connecting pipe port combination bricks of a hot blast furnace, aiming to solve the problem of difficulty in replacing and maintaining the connecting pipe and the connecting pipe port combination bricks of the existing hot blast furnace.

[0005] The present invention proposes a construction method for replacing the connecting pipe and the composite bricks of the connecting pipe port of a hot blast furnace. The construction method comprises the following steps: a connecting pipe dismantling step, which is to dismantle the damaged original connecting pipe pipe bricks; a connecting pipe laying step, which is to lay the connecting pipe bricks; a composite brick dismantling step, which is to dismantle the damaged connecting pipe port composite bricks; a composite brick laying step, which is to dry-place composite bricks on an arch tire for pre-laying, draw lines on the exposed bricks, process the bricks according to the lines, fine-grind and pre-place the door bricks according to the door closing space and the relationship between adjacent bricks, lay the bricks in sequence, gradually drive the door bricks in from the connecting pipe side to the heat storage chamber side, and supplement the fire mud on the brick surface to complete the laying of the connecting pipe port composite bricks.

[0006] Furthermore, in the above-mentioned construction method for replacing the hot blast furnace connecting pipe and the connecting pipe port combination bricks, the connecting pipe removal step includes the following sub-steps: a measurement sub-step, measuring and recording the expansion joint position and width of the connecting pipe bricks and the inner diameter of the connecting pipe; a removal preparation sub-step, laying rubber on the lower semicircle of the connecting pipe and the bottom position of the channel in the heat storage chamber, and arranging a dense hole safety net on both sides of the connecting pipe; a filling sub-step, filling fiber felt in the expansion joints and cracks of the connecting pipe bricks; a connecting pipe removal sub-step, removing the damaged connecting pipe bricks.

[0007] Furthermore, in the above-mentioned construction method for replacing the hot blast furnace connecting pipe and the connecting pipe port combination bricks, in the connecting pipe removal sub-step, before removing the pipe bricks of the connecting pipe, the combustion chamber side end port combination bricks and the retained parts of the pipe bricks are supported and reinforced.

[0008] Furthermore, in the above-mentioned construction method for replacing the hot blast furnace connecting pipe and the connecting pipe port combination bricks, in the connecting pipe removal sub-step, when removing the pipe bricks of the connecting pipe, the arch tire is supported at the removal location, and after a gap is opened at the removal location using a jackhammer, the pipe bricks are removed using a steel chisel.

[0009] Furthermore, the above-mentioned hot blast furnace connecting pipe and connecting pipe port combined brick replacement construction method, the connecting pipe masonry step includes the following sub-steps: a cleaning sub-step, cleaning the sintered ceramic fiber on the connecting pipe side, and removing the spray paint on the inner side of the temperature measuring hole short tube; a lower half ring masonry sub-step, masonry the second and third layers of insulation bricks and silicon bricks of the lower half ring from the middle to both sides; an arch masonry sub-step, after the lower half ring is masonry completed, support the upper half ring of pipe bricks according to the inner diameter of the retained brick lining to build the arch tire, and use Adjust the wooden wedges to ensure the curvature and radius; in the upper half ring masonry sub-step, lay the upper half ring of pipe bricks on one side according to the closing position, and lay the insulation bricks after closing the door on each ring of working layer silicon bricks; in the closing sub-step, the masonry part is closed at the temperature measuring hole, first lay heavy bricks on the inner ring inside the closing door, and then lay insulation bricks on the outside of the pipe outside the closing door; in the temperature measuring hole masonry sub-step, lay the temperature measuring hole after determining the center position of the temperature measuring hole; in the grouting sub-step, the masonry is completed, and the inside of the pipe is grouted.

[0010] Furthermore, in the above-mentioned construction method for replacing the combined bricks of the hot blast furnace connecting pipe and the connecting pipe port, in the upper half ring masonry sub-step, the refractory fibers on the insulating bricks are filled while the insulating bricks are being laid.

[0011] Furthermore, in the above-mentioned construction method for replacing the composite bricks of the hot blast furnace connecting pipe and the connecting pipe port, the composite brick removal step includes the following sub-steps: an arch tire supporting sub-step, supporting a semicircular arch tire on the upper semi-ring pipe brick area; a wedging sub-step, using a wooden wedge to wed the semicircular arch tire so that the tread of the semicircular arch tire contacts the inner surface of the brick body; and a composite brick removal sub-step, removing the damaged composite bricks of the connecting pipe port.

[0012] Furthermore, in the above-mentioned hot blast furnace connecting pipe and connecting pipe port composite brick replacement construction method, in the composite brick removal sub-step, wooden wedges are used to wedge the good bricks to the arch tire, and a flat shovel is used to insert the mortar joints and pry to remove the damaged connecting pipe port composite bricks piece by piece.

[0013] Furthermore, the above-mentioned hot blast furnace connecting pipe and connecting pipe port composite brick replacement construction method also includes the following steps after the connecting pipe masonry step and before the composite brick masonry step: when the construction of the connecting pipe is completed and accepted, and the acid-resistant paint and spray coating inside the connecting pipe are completed, paint protection measures are taken.

[0014] Furthermore, in the above-mentioned construction method for replacing the composite bricks of the hot blast furnace connecting pipe and the connecting pipe port, in the composite brick laying step, the sizes of the door bricks, the bricks on both sides and the size of the outer ring door area are measured, and after comparing the two sizes with each other, the mortar joints are taken into account to determine the processing accuracy of the door bricks and the bricks on both sides.

[0015] The proposed replacement method for hot blast furnace connecting pipes and their end bricks utilizes detailed analysis of each step, combined with previous experience in similar construction, to achieve safe and efficient repair and replacement of connecting pipes and their end bricks. This replacement method provides a reliable construction technique for replacing and repairing local refractory materials in key hot blast furnace locations, ensuring smooth and high-quality construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference symbols are used throughout the drawings to represent the same components. In the drawings: Figure 1 A flowchart of a construction method for replacing a hot blast furnace communication pipe and a combination brick at a communication pipe port provided by an embodiment of the present invention; Figure 2 A flowchart of the steps for removing the communication pipe according to an embodiment of the present invention; Figure 3 A front view of the embodiment of the present invention when removing the pipe bricks of the communication pipe; Figure 4 A front view of a connecting pipe brick being replaced according to an embodiment of the present invention; Figure 5 A side view of a connecting pipe brick being replaced according to an embodiment of the present invention; Figure 6 A flowchart of the communication pipe construction steps provided in an embodiment of the present invention; Figure 7A front view of a connecting pipe port assembly brick being replaced according to an embodiment of the present invention; Figure 8 A side view of a connecting pipe port assembly brick being replaced according to an embodiment of the present invention; Figure 9 This is a flowchart of the steps for removing combined bricks provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0017] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, unless there is a conflict, the embodiments of the present disclosure and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0018] See also Figure 1 , which is a flowchart of a method for replacing a hot blast furnace connecting pipe and a connecting pipe port combined brick provided by an embodiment of the present invention. As shown in the figure, the method includes the following steps: The connecting pipe removal step S1 is to remove the damaged original connecting pipe bricks.

[0019] The connecting pipe laying step S2 is to lay the connecting pipe bricks.

[0020] The combined brick removal step S3 is to remove the damaged combined brick of the communication pipe port.

[0021] Specifically, when the construction of the connecting pipe is completed and accepted, and the acid-resistant paint and spray coating inside the connecting pipe are completed, paint protection measures are taken. In particular, when the construction of the connecting pipe is completed and accepted, and the acid-resistant paint and spray coating inside the connecting pipe are completed, and protective measures such as covering are taken, the construction of the combined brick masonry step S4 is carried out. During the demolition process, attention should be paid to the protection of the pipe mouth combined bricks, especially at the junction of the pipe bricks and the combined bricks. The prerequisite for the implementation of the combined brick removal step S3 is that the structural installation of the arch connecting pipe is completed and accepted, and the acid-resistant paint and spray coating inside the pipe are completed, and protective measures such as covering are taken; the construction principle of the pipe bricks is to carry out the construction from the combustion chamber side to the heat storage chamber side, and finally close the door at the temperature measuring hole of the arch connecting pipe on the heat storage chamber side.

[0022] In step S4 of laying combined bricks, pre-lay the combined bricks on the arch, draw lines on the exposed bricks, process the bricks according to the lines, fine-grind and pre-lay the door bricks according to the door space and the relationship between adjacent bricks, and lay them in sequence. Stepwise drive the door bricks from the connecting pipe side to the heat storage chamber side, supplement the fire mud on the brick surface, and complete the laying of the combined bricks at the connecting pipe port. The construction is completed.

[0023] Specifically, measure the dimensions of the door bricks, the bricks on both sides, and the dimensions of the outer ring door area, compare the two dimensions, and include the mortar joints to determine the processing accuracy of the door bricks and the bricks on both sides. The order of composite brick laying is: dry laying of composite bricks, line drawing, brick processing, symmetrical laying, driving in door bricks, and grouting with mortar; the masonry is carried out after the composite bricks are removed, mainly to control the processing accuracy of the door bricks. Therefore, it is necessary to carefully measure the dimensions of the door bricks and the bricks on both sides, measure the dimensions of the outer ring door area, compare the two dimensions, include the mortar joints, and finally determine the processing dimensions of the door bricks and the bricks on both sides. First, dry lay the composite bricks on the arch for pre-laying, then draw lines on the exposed bricks, and process the bricks according to the lines. The door bricks shall be finely ground and pre-placed according to the door space and the relationship between adjacent bricks. After passing the pre-placement inspection, they shall be laid in sequence. When closing the door, it shall be noted that the door bricks shall be driven gradually from the connecting pipe side to the heat storage chamber side. During this period, attention shall be paid to timely replenishing the fire mud on the brick surface to ensure that the fire mud of the door bricks is full. Then complete the laying of the permanent layer bricks, i.e. the connecting pipe port combination bricks.

[0024] See also Figure 2 , which is a flowchart of the communication pipe removal steps provided by an embodiment of the present invention. As shown in the figure, the communication pipe removal step S1 includes the following sub-steps: In the measurement sub-step S11 , the expansion joint position and width of the connecting pipe bricks and the inner diameter of the connecting pipe are measured and recorded.

[0025] Specifically, measurement records must be made before dismantling the vault connecting pipe, recording the position and width of the expansion joint of the pipe bricks and the inner diameter of the connecting pipe.

[0026] In the dismantling preparation sub-step S12, rubber is laid on the lower semicircle of the connecting pipe and the bottom of the channel in the heat storage chamber, and a dense-hole safety net is set on both sides of the connecting pipe.

[0027] Specifically, first, rubber should be laid on the lower half of the connecting pipe; then, the bottom of the channel inside the heat storage chamber should be covered with rubber, and dense-hole safety nets should be used on both sides of the connecting pipe to prevent objects from falling into the heat storage chamber during construction and causing damage to the lattice bricks.

[0028] In the filling sub-step S13, fiber felt is filled in the expansion joints and cracks of the pipe bricks of the connecting pipe.

[0029] Specifically, fiber felt is stuffed into the expansion joints and cracks of the connecting pipe bricks to prevent debris from entering, which also serves as a repair for the expansion joints at various locations.

[0030] The connecting pipe removal sub-step S14 is to remove the damaged connecting pipe bricks.

[0031] Specifically, before removing the damaged connecting pipe bricks, the combustion chamber side port combination bricks and the retained part of the pipe bricks should be supported and reinforced to prevent damage to other retained parts during the removal process; during the removal, if Figure 3 As shown, a small arch is provided to support the demolition site, that is, a first arch 1 is provided to prevent the refractory from collapsing during the demolition process. After using a jackhammer to open a gap in the demolition site, a steel chisel is used for demolition. During the demolition process, the use of a jackhammer should be avoided as much as possible to prevent the vibration from causing the port combination bricks to loosen. The first arch 1 can be provided on the bracket 2 so that the center of the first arch 1 coincides with the center O of the connecting pipe, so that the connecting pipe can be subsequently laid on the upper side of the refractory bricks 3 on the lower half ring. Figure 4 and Figure 5 As shown, the connecting pipe replacement area A can be removed first, and the left side of the connecting pipe pipe brick and the connecting pipe port combination brick can be the T chamber side.

[0032] See also Figure 6 , which is a flowchart of the communication pipe masonry steps provided by an embodiment of the present invention. As shown in the figure, the communication pipe masonry step S2 includes the following sub-steps: In the cleaning sub-step S21, the sintered ceramic fibers on the pipeline side of the connecting pipe are cleaned, and the spray coating on the inner side of the short pipe of the temperature measuring hole is removed.

[0033] Specifically, the ceramic fibers that have been sintered into blocks on the pipeline side are cleaned before masonry; the spray coating on the inner side of the short tube of the temperature measuring hole is removed in order to facilitate masonry and door closure.

[0034] The lower half ring masonry sub-step S22 is to masonry the second and third layers of insulation bricks and silica bricks of the lower half ring from the middle to both sides.

[0035] Specifically, the second and third layers of insulation bricks and silica bricks in the lower half of the ring should be laid from the center outward, with expansion joints and mortar joints set to the designed dimensions. Before laying silica bricks or during a cold-situation survey, multiple measurements of the masonry range and radius should be taken to determine the size of each expansion joint based on actual distances and to assess the deformation of the existing masonry. The expansion joint between the new and old masonry should be primarily based on the results of the cold-situation survey, taking into account the original design dimensions.

[0036] In the arch tyre construction sub-step S23, after the lower half ring is built, the upper half ring of pipe bricks is supported to build the arch tyre according to the inner diameter of the retained brick lining, and the curvature and radius are adjusted with wooden wedges.

[0037] Specifically, after the lower half ring is built, in order to ensure that the staggered interface between the new and old brick linings meets the masonry standards, it is necessary to support the brick lining according to the inner diameter of the retained brick lining (the part of the tire strip extending close to the retained brick) as follows: Figure 7 The upper half ring of pipe bricks shown is used to build a semicircular arch 4, and wooden wedges are used to adjust the curvature and radius.

[0038] In the upper half ring masonry sub-step S24, the upper half ring of pipe bricks is masoned on one side according to the closing position, and the insulation bricks are masoned after the silicon bricks of each ring working layer are closed.

[0039] Specifically, the pipe bricks in the upper half of the ring are laid on one side according to the closing position. After the working layer of silica bricks in each ring is closed, the insulation bricks are laid. The refractory fiber filling on top of the insulation bricks is also filled in as the insulation bricks are laid. At the junction of new and old masonry, the sintered mud and spray coating on the old joint surface must be carefully polished before laying. In places where the new and old parts are difficult to connect, the mortar in the gap must be fully filled.

[0040] In the door closing sub-step S25, the masonry part is closed at the temperature measuring hole, firstly heavy bricks are laid on the inner ring inside the door, and then insulation bricks are laid on the outside of the pipe outside the door.

[0041] Specifically, the masonry part is closed at the temperature measuring hole. When closing the door, the inside and outside of the pipe need to cooperate. First, the inner ring of heavy bricks is laid, and then the insulation bricks are laid outside the pipe. When laying, ensure that the mortar at the closing point of the heavy bricks is full and the size of the mortar joint meets the requirements.

[0042] The temperature measuring hole masonry sub-step S26 is to determine the center position of the temperature measuring hole and then masonry the temperature measuring hole.

[0043] Specifically, the temperature measuring holes should be laid according to the design drawings. The center position of the temperature measuring holes should be determined first during the laying process to ensure that the diameter rate of each hole brick is maintained after laying.

[0044] In the grouting sub-step S27, the masonry is completed and the inner side of the pipe is grouted.

[0045] Specifically, after the masonry is completed, the inside of the pipe should be grouted.

[0046] See also Figure 9 , which is a flowchart of the combined brick removal step provided by an embodiment of the present invention. As shown in the figure, the combined brick removal step S3 includes the following sub-steps: In the arch support sub-step S31, a semicircular arch is supported on the upper half ring of pipe bricks.

[0047] Specifically, the pipe mouth is supported by a semicircular arch. Figures 4 to 7 The method shown is to support a semicircular arch 4 in the pipe mouth combined brick area. Figure 7 and Figure 8As shown, the communication pipe combination brick replacement area B can be removed first. It can be determined whether a smaller brick 5 on the upper side of the replacement area needs to be repaired, and whether the two larger bricks 6 placed below the above-mentioned brick on the upper side of the replacement area need to be repaired.

[0048] In the wedging sub-step S32, wooden wedges are used to wedgingly tighten the semicircular arch tread so that the tread of the semicircular arch tread contacts the inner surface of the brick body.

[0049] Specifically, tighten the wooden wedges and ensure good contact between the tread and the inner surface of the brick during arch support. Use small wooden wedges to tighten the wedges if necessary. For demolition areas, temporarily postpone the installation of arch tread strips before demolition. Dismantling of the pipe assembly bricks can only be carried out after all arch supports are completed and inspected and confirmed to be qualified.

[0050] The combined brick removal sub-step S33 is to remove the damaged communication pipe port combined brick.

[0051] Specifically, before removing the pipe mouth combination bricks and the damaged port combination bricks, use wooden wedges to wedge the surrounding good bricks and the arch tires tightly, insert a small flat shovel into the mortar joints, and gently pry to remove them one by one. During the removal, observe the changes in the surrounding refractory materials at any time. If necessary, wedge wooden wedges at the place where the bricks fall off (slight force will be enough). After the removal is completed, use a flat shovel to scrape off the mortar scars on the brick surface.

[0052] In summary, the construction method for replacing the hot blast furnace connecting pipe and connecting pipe port brick assembly provided in this embodiment achieves safe and efficient maintenance and replacement of connecting pipes and connecting pipe port brick assembly through detailed analysis of each step and integrated research based on previous similar construction experience. This replacement construction method provides a reliable construction technology for the replacement and maintenance of local refractory materials in key areas of such hot blast furnaces, ensuring smooth construction and ensuring construction quality.

[0053] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0054] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediary, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0055] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A construction method for replacing the hot blast furnace connecting pipe and the connecting pipe port combined bricks, characterized in that: The steps include: The steps for removing the connecting pipe are to remove the damaged original connecting pipe bricks; The connecting pipe masonry step is to lay the connecting pipe bricks; The step of removing the combined bricks is to remove the damaged combined bricks at the communication pipe port; The steps for laying combined bricks are to pre-lay combined bricks on the arch tire, draw lines on the exposed bricks, process the bricks according to the lines, fine-grind and pre-lay the door bricks according to the door space and the relationship between adjacent bricks, and lay them in sequence. The door bricks are gradually driven in from the connecting pipe side to the heat storage chamber side, and the fire mud on the brick surface is supplemented to complete the laying of the combined bricks at the connecting pipe port.

2. The construction method for replacing the hot blast stove connecting pipe and the connecting pipe port combined bricks according to claim 1, characterized in that: The communication pipe removal step includes the following sub-steps: The measuring sub-step measures and records the expansion joint position and width of the connecting pipe bricks and the inner diameter of the connecting pipe; In the dismantling preparation sub-step, rubber is laid on the lower semicircle of the connecting pipe and the bottom of the channel in the heat storage chamber, and densely-packed safety nets are installed on both sides of the connecting pipe; a filling sub-step of filling the expansion joints and cracks of the pipe bricks of the connecting pipe with fiber felt; The connecting pipe removal sub-step is to remove the damaged connecting pipe bricks.

3. The construction method for replacing the hot blast stove connecting pipe and the connecting pipe port combined bricks according to claim 2, characterized in that: In the communication pipe removal sub-step, Before removing the pipe bricks of the connecting pipe, support and reinforce the remaining parts of the combined port bricks and pipe bricks at the side end of the combustion chamber.

4. The construction method for replacing the hot blast stove connecting pipe and the connecting pipe port combined bricks according to claim 2, characterized in that: In the communication pipe removal sub-step, When removing the pipe bricks of the connecting pipe, support the arch at the removal site, use a jackhammer to open a gap at the removal site, and then use a steel chisel to remove the pipe bricks.

5. The construction method for replacing the hot blast stove connecting pipe and the connecting pipe port combined bricks according to any one of claims 1 to 4, characterized in that: The communication pipe laying step comprises the following sub-steps: Cleaning sub-step: clean the sintered ceramic fiber on the side of the connecting pipe and remove the spray paint on the inner side of the short pipe of the temperature measuring hole; The lower half ring masonry sub-step is to lay the second and third layers of insulation bricks and silica bricks of the lower half ring from the middle to both sides; Arch masonry sub-step: After the lower half ring is built, the upper half ring of pipe bricks is supported according to the inner diameter of the retained brick lining to build the arch, and wooden wedges are used to adjust the curvature and radius; In the upper half ring masonry sub-step, the upper half ring of pipe bricks is masoned on one side according to the closing position, and the insulation bricks are masoned after the silicon bricks of each ring working layer are closed; The door closing step is to close the door at the temperature measuring hole. First, lay heavy bricks on the inner ring inside the door, and then lay insulation bricks on the outside of the pipe outside the door. The temperature measuring hole masonry sub-step is to determine the center position of the temperature measuring hole and then masonry the temperature measuring hole; In the grouting sub-step, the masonry is completed and the inner side of the pipe is grouted.

6. The construction method for replacing the hot blast stove connecting pipe and the connecting pipe port combined bricks according to claim 5, characterized in that: In the upper half ring masonry sub-step, When laying the insulation bricks, fill the refractory fibers on the insulation bricks.

7. The construction method for replacing the hot blast stove connecting pipe and the connecting pipe port combined bricks according to any one of claims 1 to 4, characterized in that: The combined brick removal step includes the following sub-steps: In the arch tying supporting sub-step, a semicircular arch tying is supported on the upper half ring of pipe brick area; The wedging sub-step is to use wooden wedges to wedging the semi-circular arch tire so that the tread of the semi-circular arch tire contacts the inner surface of the brick body; The sub-step of removing the combination bricks is to remove the damaged communication pipe port combination bricks.

8. The construction method for replacing the hot blast stove connecting pipe and the connecting pipe port combined bricks according to claim 7, characterized in that: In the combined brick removal sub-step, Use wooden wedges to wedge the good bricks to the arch tire, use a flat shovel to insert into the mortar joints and pry to remove the damaged communication pipe port combination bricks one by one.

9. The construction method for replacing the hot blast stove connecting pipe and the connecting pipe port combined bricks according to any one of claims 1 to 4, characterized in that: After the connecting pipe laying step and before the combined brick laying step, the following steps are also included: When the construction of the connecting pipe is completed and accepted, and the acid-resistant paint and spray coating inside the connecting pipe are completed, paint protection measures are taken.

10. The construction method for replacing the hot blast stove connecting pipe and the connecting pipe port combined bricks according to any one of claims 1 to 4, characterized in that: In the combined brick laying step, Measure the dimensions of the door closing bricks, the bricks on both sides and the dimensions of the outer ring door closing area, compare the two dimensions with each other and take the mortar joints into account to determine the processing accuracy of the door closing bricks and the bricks on both sides.

Images