147results about "Coke oven brickwork" patented technology

The invention discloses a masonry robot virtual-real cooperative control method and system based on digital twinning, and aims to realize high-precision and high-safety automatic masonry of a coke oven by a robot. The method comprises the following steps: firstly, constructing a digital twin system of a masonry robot, and setting a masonry robot entity industrial control process: firstly, conveying refractory bricks to a specified photographing position by a brick conveying platform, and then photographing and identifying by a truss clamping jaw; the truss clamping jaw moves to a refractory brick grabbing position for grabbing, and meanwhile, the mechanical arm with the slurry pipe is used for spraying slurry; and after the movable truss moves to the refractory brick placement position, accurate placement is identified. In the virtual-real cooperative control process, the virtual entity model is updated in real time through state information acquired by a sensor of a real system; making and optimizing a control strategy in the virtual environment; and real-time decision making is carried out by utilizing the virtual entity model, so that the operation of the physical entity is adjusted.

The invention discloses a masonry structure and a construction method thereof for assisting a coke oven with a polyethylene film, comprising a longitudinal refractory brick wall and a transverse refractory brick wall, both of which are formed by refractory brick masonry, a coke oven combustion chamber is provided with a plurality of transverse refractory brick walls to divide the coke oven combustion chamber into a plurality of combustion chamber units, the combustion chamber is provided with a plurality of polyethylene film layers from bottom to top, the two sides of the polyethylene film layer in the length direction are clamped in the longitudinal refractory brick wall, the two ends of the polyethylene film layer in the width direction are clamped in the transverse refractory brick wall, and the polyethylene film layer is covered on the transverse refractory brick wall that divides the combustion chamber. The invention can realize rapid garbage cleaning and film combustion and decomposition, thereby achieving the purpose of environmental protection, high efficiency and precise construction, and improving construction efficiency and construction quality.

The invention discloses a coke oven combustion chamber vertical flue module based on a pouring process and a construction method, the module comprises a first assembly module which comprises a first module main body (1), a partition wall module (2) and a separation layer (5), and a second assembly module which comprises a second module main body (16), a partition wall module (2), a separation layer (5) and an adjustable template for pouring the assembly modules, the adjustable template comprises a positive and negative thread supporting device (6), a wooden wedge (7), a U-shaped clamp (8), an outer die (9), a hole channel core die (10), a first arc groove die (11), a second arc groove die (12), a stepped caulking template (13), an inner die (14) and a bottom die (15), the adjustable template is made of a high-strength metal material, and the adjustable template with enough rigidity and stability is accurately erected according to the actual size of a combustion chamber. According to the module and the construction method, the repairing efficiency, stability and safety of the coke oven combustion chamber are remarkably improved.

A method of repairing or replacing a roof of a coke oven battery in operation, said coke oven battery including a number of parallel coking chambers separated by heating walls and delimited on top by a ceiling, itself covered by a roof, the roof having for each coking chamber a number of charging holes or gas transfer holes above the coking chamber, a number of inspection holes above the separating heating walls, one or two base rings connected to one or two gas collecting mains and rail sleepers supporting rails for a coke charging car or charging gas transfer car through an ascension pipe. A kit of parts with construction modules and the use of such kit of parts in the repairing or replacing of a roof of a coke oven battery in operation and or with at least one oven empty in hot condition is also related.

The invention relates to the technical field of methods special for coke oven masonry, in particular to a dynamic dustproof construction method in a coke oven combustion chamber masonry process, which comprises the following steps: arranging a first flexible isolation layer; a protection device is installed in the combustion chamber, the position of the protection device is periodically adjusted along with the laying progress, the protection device is removed after laying is conducted to a third height, the first flexible isolation layer is broken after being cleaned, and a second flexible isolation layer is laid; after the combustion chamber overhead building is completed, dust on the second flexible isolation layer is cleared and then broken, and a top opening of the combustion chamber is subjected to top sealing protection; in the follow-up masonry process, top sealing protection is updated regularly till masonry is completed; according to the method, dynamic segmented protection is achieved, whole-course dust prevention is achieved by laying the flexible isolation layer in stages and dynamically adjusting the protection device, and a cleaning blind area of one-time protection in a traditional method is avoided. The protection device does not need to be disassembled and assembled repeatedly along with improvement of the masonry progress, and the construction efficiency is improved.

A corbel for a coke oven includes a gun block portion having a vertical through hole disposed therein, the gun block portion having at least one generally vertical through hole communicating with the vertical through hole. The gun block portion may be integral with a base. The gun block portion also includes a generally vertical rectangular channel having an opening at a first end of the gun block portion and an opening at a first side of the gun block portion.

The utility model provides a brick positioning and supporting device of a coke oven furnace end masonry robot, which belongs to the technical field of coke oven construction engineering and comprises a stand column, a linear sliding table and a limiting mechanism. The linear sliding table is installed on the stand column, one end of the limiting mechanism is connected with the linear sliding table, and the linear sliding table can drive the limiting mechanism to move in the direction of the stand column. And the limiting mechanism is used for limiting the position of the furnace end masonry. The furnace end brickwork is limited and supported by the limiting mechanism through the lifting of the linear sliding table, so that the requirements of different wall widths can be met. By means of the design, the integrity of masonry is guaranteed, and bricks on the two sides are prevented from moving due to extrusion force in the masonry process.

The invention belongs to the technical field of plug brick installation, and particularly discloses a coke oven carbonization chamber top drying hole plug brick installation device and a construction method, the installation device comprises a support unit, a clamping unit, a pushing unit and an observation unit; the supporting unit comprises a hollow inclined pipe, a hollow horizontal pipe connected with the upper end of the hollow inclined pipe, and a supporting plate connected with the hollow horizontal pipe; the clamping unit comprises a clamping switch arranged at the lower end of the outer side of the hollow inclined pipe and a clamping assembly connected with the clamping switch and arranged on the front side of the supporting plate. The pushing unit comprises a pushing switch arranged at the lower end of the outer side of the hollow inclined pipe and a pushing assembly connected with the pushing switch, and one end of the pushing assembly penetrates through the supporting plate; the observation unit is used for assisting in observing the mounting process of the plug brick; the plug brick is stably clamped through the clamping unit, the observation unit is used for aligning the plug brick to the drying hole, the pushing unit is used for installing the plug brick into the drying hole, the installation precision and the installation efficiency of the plug brick are remarkably improved, and the labor intensity is reduced.

The invention discloses a local cooling method for patching and taking bricks of a coke oven carbonization chamber, and relates to the field of repairing and digging operation of coke oven carbonization chambers. The invention aims to solve the technical problems of long construction period and low production efficiency due to adoption of whole cooling of full-row vertical flues in the minor repair patching operation of the combustion chamber at present. The method comprises the following steps: 1, confirming a brick picking point location of a damaged flame path; secondly, the damaged flame path is cooled, and heat preservation is conducted on the furnace wall through heat preservation cotton; thirdly, the broken flame path is subjected to wall smashing, patching and brick taking, and then building and repairing are conducted; and fourthly, after repairing in the third step is completed, heating is conducted. According to the method, the damaged flame path is accurately maintained, so that the use of materials is reduced, and meanwhile, the workload of constructors is reduced. And after maintenance is completed, heat transfer is conducted on the maintained vertical flame path through the unmaintained vertical flame path, and the temperature rise time of the vertical flame path is shortened. The method is used for maintaining the coke oven carbonization chamber.

The invention relates to a coke oven combustion chamber structure. A plurality of vertical flame paths forming a coke oven combustion chamber are divided into machine side furnace end vertical flame paths, middle vertical flame paths and coke side furnace end vertical flame paths; wherein the side wall of the machine-side furnace end vertical flame path is built by using equal-thickness side wall bricks I, the side wall of the coke-side furnace end vertical flame path is built by using equal-thickness side wall bricks II, and the side wall of the middle vertical flame path is built by using equal-thickness side wall bricks III; the thickness of the first side wall brick is the same as that of the second side wall brick, and the thickness of the third side wall brick is smaller than that of the first side wall brick and that of the second side wall brick. The thickness of the middle vertical flame path side wall bricks is smaller than that of the furnace end vertical flame path side wall bricks on the two sides, the middle vertical flame path side wall bricks are made of the refractory materials with the heat transfer performance better than that of the furnace end vertical flame path side wall bricks on the two sides, the heat transfer performance of the combustion chamber furnace wall is effectively improved, the structure is simple, the number of brick types is small, and the manufacturing cost is low.

The utility model discloses a thermal shock resistant heat recovery coke oven gas collecting pipe which comprises a gas collecting pipe shell, and a gas collecting pipe heat preservation layer, a lower pipe circumference heat insulation layer and a lower pipe circumference surface heat layer are sequentially arranged on the lower half circumference of the inner wall of the gas collecting pipe shell from outside to inside. The upper half circumference of the inner wall of the gas collecting pipe shell is sequentially provided with a gas collecting pipe heat preservation layer, an upper pipe circumference heat insulation layer, a heat spreader and an upper pipe circumference heat layer from outside to inside, and a gas collecting pipe cavity is defined by the upper pipe circumference heat layer and the lower pipe circumference heat layer; the soaking device comprises a soaking device shell, a shell cavity of the soaking device shell is filled with metallic tin, and the filling rate of the metallic tin in the shell cavity ranges from 92% to 95%. The thickness of the upper pipe peripheral heat insulation layer is greater than that of the upper pipe peripheral surface heat layer; the thickness of the lower pipe circumferential surface heat layer is larger than that of the lower pipe circumferential heat insulation layer. Soaking rib plates are fixedly arranged on two side plates of the soaking device shell and are positioned in a shell cavity of the soaking device shell. The gas collecting pipe can effectively eliminate thermal stress generated by temperature imbalance, and ensures safe and reliable conveying of high-temperature waste heat.

The embodiment of the invention provides a vertical heat recovery coke oven. The vertical heat recovery coke oven comprises a coke oven bed bottom, a lower flue, a heat exchange chamber, a chute, a plurality of carbonization chambers, a plurality of combustion chambers and an oven top which are sequentially arranged in the height direction. The lower flue comprises a plurality of transverse arches which are sequentially arranged at intervals, a plurality of longitudinal arches which are sequentially arranged at intervals, at least one flue outlet and a plurality of flue gas inlets, and the transverse arches and the longitudinal arches are mutually crossed and communicated to form a multi-split linked arch. When the lower flue bears a load, the load of the upper masonry is dispersed to a plurality of arch structures through the crossed layout of the multi-split arch, so that an integral stress system is formed, and the furnace body structure of the vertical heat recovery coke oven is more stable. In a high-temperature environment, the arch size of the multi-split combined arch is small, so that the expansion deformation of the arch structure is small, and the problem of leakage is not easy to occur. Meanwhile, high-temperature flue gas is divided by the multi-division structure of the multi-division combined arch, so that the gas flow distribution is more uniform, and the thermal regulation of the coke oven is facilitated.

The utility model discloses a connecting structure for coke oven door lining brick fixing bolts, which comprises two fixing base plates, the number of the fixing base plates is two, the fixing base plates are respectively and horizontally arranged on two sides along the longitudinal direction, and the fixing base plates on the two sides are respectively provided with a plurality of vertically arranged anchor bolts I in a combined manner through connecting and positioning components. The device has the beneficial effects that the coaxiality of the thread bushing and the matching hole can be ensured, so that the accurate coaxiality of the screw rod part I at the top of the anchor bolt I is ensured after the screw rod part I is coaxially matched with the thread bushing, and the condition that the anchor bolt I is not vertical to the top surface of the fixed base plate is avoided; the perpendicularity of the first anchoring bolt and the fixing base plate is guaranteed, it is guaranteed that the first anchoring bolt can be accurately limited and compared with the hole position of the furnace door frame, and therefore it is guaranteed that the furnace door lining brick can be smoothly and stably fixed to the furnace door frame in the mode that the first anchoring bolt is additionally provided with a locking nut.

The invention discloses a coke oven regenerative chamber and an air quantity adjusting structure thereof, and relates to the technical field of coke oven heating, the air quantity adjusting structure comprises a brick seat stand, the brick seat stand is mounted at the top of a small flue, a through groove is formed in the brick seat stand, and the small flue is communicated with a coke oven regenerative chamber body through the through groove; a wind shielding structure is arranged in the through groove, an airflow channel is formed between the wind shielding structure and the peripheral wall of the through groove, and a through hole penetrating in the axial direction of the wind shielding structure is formed in the wind shielding structure; the adjusting brick can be partially and rotatably mounted in the through groove, and a mounting hole is formed in the side, facing the wind blocking structure, of the adjusting brick; the inserting end of the adjusting rod sequentially penetrates through the bottom of the small flue, the middle of the small flue and the through hole and is connected to the mounting hole in an inserted mode. According to the technical scheme, through the arrangement of the brick seat stand, the adjusting brick and the adjusting rod, precise adjustment of the gas amount is achieved, meanwhile, operation of operators is easy, time consumed in the process is short, the labor cost is reduced, and the working efficiency is improved.

The invention discloses an aluminum silicate fiber reinforced coke oven regenerative chamber sealing wall, which belongs to the technical field of coke oven bodies, and specifically comprises the following steps: building magnesium-aluminum high-strength heat-insulating bricks in a staggered joint manner as an inner layer, reserving expansion joints, sequentially paving an aluminum silicate fiber blanket on an outer layer, mounting and fixing an asbestos-free calcium silicate plate, and painting a heat-insulating coating to form a coating, finally, a steel wire mesh is laid and fixed, and the coke oven regenerative chamber sealing wall is obtained. According to the invention, the aluminum silicate fiber blanket is enhanced, and the magnesium-aluminum high-strength heat-insulating brick and the heat-insulating coating are prepared, so that the heat-insulating property, the sealing property and the thermal expansion property of the sealing wall of the regenerative chamber of the coke oven are further optimized.

To provide a judging method by which the time for reloading furnace bottom bricks in a carbonization chamber can properly be found out in relation to the actually occurring pushing clogging.SOLUTION: The determination method includes a push-out step, a detection step, an accumulation step, a cleaning step, a measurement step, a determination step, an identification step, a collation step, and a determination step (steps #5 to #45). In the final determination step (step #45), when a specific portion is present in the displacement of the furnace bottom of the carbonizing chamber in which the push-clogging has occurred, and the position x1 at which the maximum displacement of the specific portion appears overlaps the position x2 at which the second peak appears in the immediately preceding pushing force waveform, it is determined that the time to restack the bricks on the furnace bottom in the carbonizing chamber has arrived.SELECTED DRAWING: Figure 5

The invention relates to the technical field of coke ovens, in particular to a heat recovery coke oven cooling channel which comprises cooling channels which are arranged in the length direction of the coke side of a coke oven machine and are completely through, the cooling channels are arranged at intervals, and the heat recovery coke oven cooling channel further comprises a plurality of transverse communicating channels which are perpendicular to the cooling channels and intersect with the cooling channels. The two ends of each transverse communicating channel are connected with the vertical channels of the resisting wall area respectively, and the vertical channels extend upwards to a furnace top chimney. According to the invention, the chimney effect of the vertical channel at the resisting wall can be fully utilized to attract air entering the cooling channel from the machine coke side furnace end to quickly flow, so that the cooling effect is improved.

The present invention relates to an adjustable coke oven inclined flue structure, which includes flue one and flue two arranged side by side corresponding to the same vertical flue. A nose brick is provided between flue one and flue two; the nose brick is movably placed on the top of the inclined flue area masonry and can be replaced; the nose brick is provided with multiple specifications for standby at different heights. The present invention improves the nose brick from the conventional fixed structure to a movable structure. By replacing nose bricks of different specifications, the shape of the inclined flue opening and the distance between the top surface of the nose brick and the bottom surface of the vertical flue are changed, so as to ensure the high-level heating uniformity of the coke oven when different varieties of gas are used for heating.

The present application discloses a special-shaped brick, a coke oven, a system and a method containing the special-shaped brick. The special-shaped brick includes a main body, a filling part and a groove. The main body includes a first side wall, a second side wall and a third side wall arranged in sequence. The first side wall, the second side wall and the third side wall form a U shape. Step parts are provided at one ends of the first side wall and the third side wall far away from the second side wall; the filling part is integrally arranged in the main body. The filling part has a blanking inclined surface. There is a spacing between one end of the blanking inclined surface adjacent to the step part and one end of the step part far away from the second side wall. The area between the blanking inclined surface, the first side wall and the third side wall forms a blanking groove; the groove is arranged between the second side wall and the blanking inclined surface and penetrates through the first side wall, the filling part and the third side wall. In the use process of the special-shaped brick according to the embodiment of the present application, the blanking inclined surface facilitates the sliding of materials, the step part facilitates the connection of two relatively arranged special-shaped bricks and forms a zigzag blanking channel, and the groove can be used for gas circulation and the like.

A method for building a coke own includes steps of building an oven body building three-dimensional control network, and building a coke side or machine side refractory brick receiving platform; based on the three-dimensional control network and the refractory brick receiving platform, marking out a laying position of each layer of refractory bricks layer by layer, arranging the refractory bricks required by laying of each layer by layer, laying the refractory bricks layer by layer according to the marking and the arrangement, jointing the laid refractory bricks layer by layer, cleaning the jointed refractory bricks layer by layer, and checking and accepting the cleaned refractory bricks layer by layer. In this method, quality control is carried out on coke oven body masonry on the whole through six dimensions.

The utility model discloses coke oven carbonization chamber modularization combined firebrick structure relates to firebrick technical field. The utility model discloses a first firebrick body, first firebrick body one side is installed with second firebrick body, first firebrick body one side is provided with the stop gear, and the stop gear includes the limit slot that sets up respectively in first firebrick body and second firebrick body one side, and the limit block fixedly connected respectively in first firebrick body and second firebrick body other side, and the limit rod is inserted in first firebrick body top. The utility model discloses through the cooperation of stop gear and the joint of mechanism, and the firebrick is combined into modularization unit. When local brick body is damaged, only needs to dismount corresponding unit, need not to remove integral structure, has reduced the difficulty of replacement and maintenance cost significantly, and through the plug -in design of limit block, limit slot and limit rod, the quick positioning and fixation between firebrick have been realized.

The invention relates to a down-regulation coke oven grate brick resistance measuring device, which comprises a grate brick upper pressure measuring tube, a grate brick lower pressure measuring tube and a sealing fixing cover, and is characterized in that the tops of the grate brick upper pressure measuring tube and the grate brick lower pressure measuring tube are provided with side holes, and the bottoms of the grate brick upper pressure measuring tube and the grate brick lower pressure measuring tube are fixedly connected with the sealing fixing cover; the pressure measuring device has the advantages of being easy to operate, accurate and efficient in measured data, convenient to carry, flexible to install, capable of being repeatedly used, high in practicability, economical and practical, and has the practical significance of general popularization.

The present invention relates to a method for repairing the wall of a coke oven carbonization chamber, which belongs to the technical field of coke oven carbonization chamber maintenance, comprising: S1, removing coke from the carbonization chamber of the damaged wall in the middle and late stages of coking; S2, placing a triangular heat-insulating frame wrapped with asbestos felt according to the position of the vertical fire channel where the damaged part of the repaired wall is located; pasting asbestos felt on the wall surface of the undamaged part of the wall; S3, inserting a ceiling tool from the upper part of the vertical fire channel to hang the upper part of the disassembled damaged wall; S4, digging a live masonry opening at the bottom of the carbonization chamber opposite the vertical fire channel; S5, dividing the damaged wall surface from bottom to top into three sections in the vertical direction, first selecting the wall surface of 1 / 3 of the height from the lower part for disassembly and masonry; and then masonry the remaining two sections in sequence. The present invention adopts a high-direction segmentation method to repair large-scale damage to the wall of the coke oven carbonization chamber, which is time-saving, easy to operate, and has a high safety factor. It reduces the labor intensity of thermal engineering management personnel, accumulates rich experience in furnace body maintenance, and improves furnace body environmental protection control.

The invention discloses a method for replacing a carbon bottom brick in an unmanned coke oven carbonization chamber, and relates to the technical field of coke oven maintenance, and the method comprises the following steps: setting a carbonization chamber adjacent to a maintenance carbonization chamber as a buffer furnace, and controlling the temperature in the buffer furnace to be in a first temperature interval; after the temperature in the buffer furnace is kept in the first temperature interval for a first preset time, arranging a machine side heat preservation layer on a machine side furnace wall of the maintenance carbonization chamber, and arranging a machine side heat preservation door at a machine side furnace door opening; by using the length-adjustable carbon bottom brick replacing device, under the condition that an operator does not enter a maintenance carbonization chamber, old carbon bottom bricks can be disassembled, and new carbon bottom bricks can be laid, so that the operator can be effectively prevented from being hurt by high temperature in the carbonization chamber; personnel use the carbon bottom brick replacing device outside the maintenance carbonization chamber for operation without being influenced by high temperature, so that the operation efficiency is high, the operation time can be effectively shortened, and the furnace door is prevented from being opened for a long time to influence the quality of a furnace wall.

To provide brick masonry structure of a combustion chamber end part of a chamber-type coke oven, that suppresses narrowing of a kiln mouth of the coke oven.SOLUTION: A first masonry brick 1A has: side wall bricks 30 that configure a side wall of a furnace length direction X end of a combustion chamber 103; and a laufer end brick 31 that is a partition wall between a combustion chamber end flue 3a on an endmost in the furnace length direction of the combustion chamber and a coke oven chamber 102. Side wall bricks are formed with shoulder parts T for receiving a built-in part 31b that is one end side of the laufer end brick. The laufer end brick has a bending point Q at which inclination changes discontinuously in a substantially central portion of a combustion chamber end flue-side side surface, and an extended part 31y formed so as to protrude inward from the combustion chamber end flue toward the side wall brick side from the bending point, in a planar view viewed from a furnace top side. The laufer end brick has an extended joint surface v where the extended part joins the combustion chamber end flue-side side surface in addition to a built-in joint surface t where a built-in part joins the shoulder parts when combined with the side wall brick, and a surface of the built-in joint surface perpendicular to a furnace length direction is closer to a chamber end side than the extended joint surface.SELECTED DRAWING: Figure 5

The invention belongs to the technical field of dry quenching furnace structures, and particularly provides a dry quenching inclined air duct partition wall and a dry quenching ventilation method.The dry quenching inclined air duct partition wall comprises a first brick body and a second brick body, the first brick body and the second brick body are both hexahedrons, and the first brick body and the second brick body are fixedly connected in a masonry mode; according to the dry quenching ventilation method, a dry quenching inclined air duct partition wall is applied; the dry quenching furnace body comprises a cooling area, a chute area, an annular air duct and a pre-storage area, the chute area is positioned below the annular air duct, and a plurality of inclined air duct partition walls which are annularly distributed divide the chute area into a plurality of inclined air ducts; for analysis of a single air duct opening, the inclined air duct and the annular air duct form an asymmetric three-way model. The resistance in the dry quenching furnace system is related to the energy consumption of the circulating fan, the negative pressure at the inlet of the boiler and the airflow resistance are reduced, the load of the circulating fan is reduced, the power consumption of the fan is reduced, the operation cost is reduced, the equipment wear is slowed down, and the energy is saved by 0.5% from the energy consumption of the fan.

The present invention discloses a 6S flat-layer masonry method for a large coke oven body, comprising the following steps: constructing a three-dimensional control network for the body masonry, and building a refractory brick receiving platform on the coke side or the machine side; based on the three-dimensional control network and the refractory brick receiving platform, marking the masonry position of each layer of refractory bricks, arranging the refractory bricks required for each layer of masonry, laying the refractory bricks layer by layer according to the marking and arrangement, grouting the refractory bricks after masonry is completed layer by layer, cleaning the refractory bricks after grouting, and inspecting the cleaned refractory bricks layer by layer. Based on the three-dimensional control network and the refractory brick receiving platform, the present invention controls the quality of the coke oven body masonry from a holistic perspective in six dimensions, maximizing the quality and precision of large coke oven masonry, and effectively reducing the difficulty of masonry technology and the degree of dependence on highly skilled furnace builders, achieving high-precision and rapid masonry, making the coke oven body neat, clean, and unobstructed, and effectively extending the service life of the coke oven.

An object is to provide a carbonization chamber usable period predicting method that can predict the amount of bulging in a carbonization chamber with high accuracy regardless of the amount of bulging and predict a usable period of the carbonization chamber on the basis of the predicted amount of bulging, and to also provide a carbonization chamber repairing method. A method for predicting a usable period of a carbonization chamber having an oven wall constructed by stacking bricks with tongue and groove, includes measuring an oven wall shape of the carbonization chamber with a shape measuring device to identify a bulge bulging inward from an initial position based on hot-state dimensions upon completion of construction of a coke oven; measuring the oven wall shape for the bulge multiple times at different measurement dates and times to determine a first regression equation representing a correspondence between time and the amount of bulging within a range where the amount of bulging is less than or equal to D1 calculated by the following equation (1) and a second regression equation representing a correspondence between time and the amount of bulging within a range where the amount of bulging is greater than or equal to D2 calculated by the following equation (2); and calculating a date and time at which the amount of bulging calculated using the first regression equation or the second regression equation reaches a predetermined threshold to predict a usable period of the carbonization chamber, D1=g−dR1+dL1 and D2=g+dR2+dL2 where, in the equations (1) and (2), g is a distance from a side of the brick with tongue and groove to a tongue and groove, dR1 is a negative manufacturing error value from the side of the brick with tongue and groove to the tongue and groove, dR2 is a positive manufacturing error value from the side of the brick with tongue and groove to the tongue and groove, dL1 is a negative measurement error value of a shape measuring device, and dL2 is a positive measurement error value of the shape measuring device.

The objective of the present invention is to make it possible to easily install precast blocks without shifting toward the furnace battery. [Solution] The guide jig of the present invention comprises two guide plates capable of clamping a precast block for a coke oven, and a connector that connects the two opposing guide plates, and is characterized in that the two guide plates have curved portions whose ends extend outward.