63results about "Brick-hot blast stoves" patented technology

The utility model relates to a hot-blast stove with a hot-blast outlet at the top, which can effectively solve the problems that the hot-blast outlet of the existing blast furnace top combustion type hot-blast stove is easy to damage and high in cost, and adopts the technical scheme that the hot-blast outlet is arranged at the top of a stove body, is vertical to the stove body and is communicated with a combustion chamber; an air inlet is formed in the outer wall of the combustion chamber horn mouth part and communicated with an air loop in the wall of the combustion chamber horn mouth part, a coal gas loop is arranged in the wall of the combustion chamber straight section part, a combustor is installed in an inner cavity, and the combustor is composed of four rows of upper and lower annular nozzles arranged on the inner side wall of the wall of the combustion chamber straight section part. The top combustion type hot blast stove is novel in structure and reasonable in design, the top outlet structure is adopted, the hole diameter of the checker brick is reduced, cost and energy can be saved, the nozzles with different angles can enable a flow field to be evenly distributed, and the top combustion type hot blast stove is an innovation of the top combustion type hot blast stove.

The hot blast stove regenerative chamber checker brick layered masonry positioning installation method provided by the invention has the following beneficial technical effects that a complete masonry method integrating gridding control, partition reference positioning, dynamic precision adjustment and special part treatment is provided; according to the method, a whole-process quality control system from benchmark setting, partition stacking, process inspection to dynamic adjustment is established, conversion of a traditional masonry process from experience-dependent judgment to data driving is achieved, the masonry precision of the ultra-large hot blast stove checker is guaranteed, the construction efficiency is remarkably improved, and the construction cost is reduced. The traditional construction period is shortened by more than 25%, and the long-term operation stability of the hot blast stove is ensured.

The embodiment of the present application discloses an anti-carbon deposition checker brick, including a checker brick body, wherein the checker brick has a plurality of transparent grid holes parallel to the side surface, and an inner lining is arranged in the grid holes, and the inner lining is used to isolate the gas from the hole wall. In the process of heating the coal gas in the regenerative heating furnace, the precipitated carbon powder is gathered on the inner lining, rather than the hole wall of the grid hole of the checker brick, thereby solving the problem of brittle cracking of the checker brick caused by carbon deposition on the hole wall of the grid hole of the checker brick.

The present invention discloses a hot air outlet structure and an installation method for a blast furnace hot blast stove, relates to the technical field of blast furnace hot air, solves the problems of heating and weld cracking in the existing hot air outlet, and reduces stress concentration. The specific scheme is as follows: it includes an arc-shaped transition steel shell for connecting the hot blast stove shell and the hot air duct, the inner wall of the arc-shaped transition steel shell is evenly fixed with anchor nails and sprayed with paint to form a paint layer, refractory fiber felt is arranged on the inner side of the paint layer, refractory filler is provided on the inner side of the refractory fiber felt, hot air duct insulation bricks and hot air duct working layer bricks are arranged in sequence from the refractory filler to the center line direction of the hot air duct, furnace wall insulation bricks, furnace wall working layer bricks and hot air outlet combination bricks are arranged in sequence from the refractory filler to the inside of the hot blast stove, and the refractory filler is located between the refractory fiber felt and the furnace wall insulation bricks and the hot air duct insulation bricks in the arc-shaped transition area.

The application discloses a construction method for removing refractory material in a blast furnace or hot blast furnace, comprising the following steps: S1, removing and cleaning furnace facilities; S2, making a hanging disc; S4, driving a excavator to the hanging disc; S5, connecting a lower lifting lug of a supporting leg with a lifting hook of a lifting device through a sling, installing a drop chain between the lower lifting lug and an upper lifting lug of a first layer after lifting the hanging disc to the first layer removal height; S6, removing the refractory material by the excavator, and removing the refractory material from a discharge port to a furnace bottom and then to a furnace mouth; and S7, repeating steps S5 and S6 to remove refractory material of a next layer. The application has the advantages of simple operation, stability and reliability, fast construction speed, low construction cost, effective saving of labor cost, complete and clean removal of the refractory material, safety and stability meeting the construction requirements, and greatly shortened construction period.

A method for monitoring the wear of a refractory lining of a blast furnace using modelling of a part of the blast furnace and thermal field calculation. Computer program allowing to perform such a method.

A refractory layer structure includes a layer of refractory blocks locked by each other in a tessellated pattern.

The invention relates to the technical field of blast furnace hot blast stoves in the metallurgical industry, in particular to a high-air-temperature top combustion type hot blast stove which comprises a stove body, a pre-combustion chamber, a combustion chamber and a heat storage chamber filled with heat storage bodies, the pre-combustion chamber is arranged above the combustion chamber, and the heat storage chamber is arranged below the combustion chamber; a plurality of mixing nozzles are formed in the inner wall of the pre-combustion chamber wall body, and at least one layer of mixing nozzles is arranged; the mixing nozzle comprises a central air channel filled with air and a coal gas channel filled with coal gas, the outermost layer is a second air channel filled with air, and the channels are concentric; the air inlet and the coal gas inlet are provided with coolers; the tubular furnace column is of an interlayer structure; and an air preheater and a coal gas preheater are arranged on the flue pipeline. By adopting an efficient nozzle combustion technology, a pre-combustion chamber thermal shock reducing technology and a high-temperature-resistant furnace column technology, low-heating-value gas is effectively utilized, and single blast furnace gas is burnt, so that the air temperature of the hot blast stove reaches 1200 DEG C or above.

A combustion control method for a hot-blast stove according to the present invention comprises: a combustion step in which heat introduced by combusting a mixed gas is stored in a heat storage chamber; an air blowing step for generating hot air by supplying cold air into the heat storage chamber, and supplying the generated hot air to the blast furnace; the combustion control method for the hot-blast stove includes the steps of calculating an actual value of heat, calculating heat consumed by generating hot air, calculating an actual value of thermal efficiency of the hot-blast stove, calculating heat to be input when generating hot air next time, calculating the amount of mixed gas to be supplied when generating hot air next time, and calculating the amount of mixed gas to be supplied when generating hot air next time. The hot-blast stove is controlled on the basis of the calculated amount of the mixed gas.

A refractory layer structure includes a plurality of refractory layers stacked on each other. Each of the refractory layers includes refractory bricks. Each of the refractory bricks is formed as a cuboid having a pair of oppositely positioned first diverging sides and a pair of oppositely positioned second diverging sides. The first diverging sides diverge away from each other from a top to a bottom of the refractory bricks. The second diverging sides diverge away from each other from the bottom to the top of the refractory bricks. The first diverging sides and the second diverging sides are connected to each other. Each of the first diverging sides have a first diverging side protrusion projecting from a top surface thereof. Each of the second diverging sides have a second diverging side protrusion projecting from a top surface thereof.

The utility model relates to a device for solving the problem of high-temperature collapse of a three-way opening of a hot air pipeline, which can effectively solve the problems of collapse of the three-way opening, redness of a pipe shell and reduction of the service life caused by non-uniform temperature, non-uniform longitudinal and transverse expansion and stress concentration at the three-way opening from inside to outside in the prior art, and adopts the technical scheme that the device comprises a T-shaped three-way opening, heavy refractory bricks are built on the inner ring of the fork, middle-ring light bricks are built on the outer sides of the heavy refractory bricks, outer-ring light bricks are built on the outer sides of the middle-ring light bricks, semi-ring refractory fiber cotton is arranged on the outer sides of the outer-ring light bricks, and a whole-ring spray coating layer is painted on the outer side of the refractory fiber cotton. The damping-down rate of the blast furnace of an iron-making plant is reduced, the air temperature and the yield are improved, meanwhile, certain contributions are made to energy conservation, yield increase and consumption reduction of the iron-making plant, and the three-way structure of the hot blast stove is innovated.

The utility model relates to the technical field of blast furnace hot blast stoves in the metallurgical industry, in particular to a high-air-temperature top combustion type hot blast stove which comprises a stove body, a pre-combustion chamber, a combustion chamber and a heat storage chamber filled with heat storage bodies, a plurality of mixing nozzles are formed in the inner wall of the pre-combustion chamber wall body, and at least one layer of mixing nozzles is arranged; the mixing nozzle comprises a central air channel filled with air and a coal gas channel filled with coal gas, the outermost layer is a second air channel filled with air, and the channels are concentric; cooling pipes are arranged at the air inlet and the coal gas inlet; the furnace column is of a sandwich structure; and an air preheater and a coal gas preheater are arranged on the flue pipeline. By adopting an efficient nozzle combustion technology, a pre-combustion chamber thermal shock reducing technology and a high-temperature-resistant furnace column technology, low-heating-value gas is effectively utilized, and single blast furnace gas is burnt, so that the air temperature of the hot blast stove reaches 1200 DEG C or above.

The present application belongs to the technical field of hot blast stove repair for blast furnace ironmaking, and particularly relates to a method for repairing slag fusion erosion interface area of an aged hot blast stove, comprising the following contents: (1) repairing: 1. cleaning the interface; 2. brushing high-temperature silica brick mortar to the slag fusion erosion interface; 3. moderately blowing with a blower or naturally drying; 4. uniformly coating high-temperature silica brick mortar on the slag fusion interface and its extended area on the inner wall of the hot blast stove and compacting; 5. moderately blowing with a blower or naturally drying again to ensure drying of the second coating; 6. using gradient creep rate control precision stove baking method to bake the stove; (2) establishing a hot blast stove temperature and pressure state trend sensing system; (3) local reinforcement; (4) vertical strengthening; (5) configuring a prestressed buffer device. The method prevents damage to the refractory lining, prevents the refractory lining from falling off and cannot be timely maintained, and prevents damage to the furnace shell by optimizing the high-temperature silica brick mortar, extending the medium-temperature baking time, local reinforcement, prestressed buffering, and the temperature and pressure state trend sensing system.

To provide an operation control method or the like of a hot-blast stove capable of making the concentration of nitrogen oxide in combustion exhaust gas discharged from the hot-blast stove appropriate even when combustion air having a higher oxygen concentration than air is used.SOLUTION: In an operation control method of a hot blast stove, hot blast is generated by burning mixed gas comprising fuel gas containing blast furnace gas discharged from a blast furnace and coke oven gas discharged from a coke oven, and combustion air having oxygen concentration higher than that of air. The operation control method of the hot-blast stove includes a mixing ratio setting step of setting a mixing ratio of the blast furnace gas and the coke oven gas of the fuel gas according to a temperature range of a flame of the mixed gas, and a combustion step of combusting the mixed gas of the set mixing ratio.SELECTED DRAWING: Figure 1

A combustion control method for a hot blast stove according to the present invention is a combustion control method for a hot blast stove including a combustion step of storing, in a regenerator, a quantity of heat input by combusting a mixed gas, and a blast sending step of generating hot blast by supplying cold blast into the regenerator and supplying the generated hot blast to a blast furnace. The combustion control method includes the steps of: calculating an actual value of the quantity of heat; calculating a quantity of heat deprived of by the generation of the hot blast; calculating an actual value of thermal efficiency of the hot blast stove; calculating a quantity of heat to be input when hot blast is generated next time; calculating a quantity of the mixed gas to be supplied when hot blast is generated next time; and controlling the hot blast stove based on the calculated quantity of the mixed gas.

To provide a method and device for combustion control of a hot air furnace, capable of suppressing the occurrence of excess heat or insufficient heat in the hot air furnace.SOLUTION: A method for combustion control of a hot air furnace includes: a combustion step of storing heat input by combusting a gas mixture in a heat storage chamber; and a blower step of generating hot air by supplying cold air into the heat storage chamber and then supplying the generated hot air to a blast furnace. The method further includes a step of calculating an actual value of heat quantity, calculating the amount of heat taken away by generating the hot air, calculating an actual value of thermal efficiency of the hot air furnace, calculating the amount of heat to be input when generating hot air next time, calculating the amount of mixed gas to be supplied when generating the next hot air, and controlling the hot air furnace based on the calculated amount of mixed gas.SELECTED DRAWING: Figure 3

The present invention proposes a heat storage device, such as a hot air stove (10), comprising a heat-regenerating refractory grid (14) formed from checker bricks (12), the refractory grid (14) being supported by a support assembly (16). According to one aspect of the invention, the support assembly (16) comprises a carrier structure (20) formed from a refractory material and a carrier bed, also formed from a refractory material, the carrier bed resting on the carrier structure (20) and positioned to support the checker bricks of the refractory grid (14).

To provide non-calcined alumina-silica brick, etc. for blast furnace or blast furnace shaft part, the brick having high hydrogen gas resistance.SOLUTION: Non-calcined alumina-silica brick for hot blast furnace or blast furnace shaft part includes: 30 mass% or more and 90 mass% or less of Al2O3; 10 mass% or more and 65 mass% or less of SiO2; and 0.5 mass% or more and 4 mass% or less of P2O5. Non-calcined alumina-silica brick for hot blast furnace or blast furnace shaft part includes for example: 50 mass% or more and 60 mass% or less of Al2O3; 35 mass% or more and 45 mass% or less of SiO2; and 0.9 mass% or more and 1.5 mass% or less of P2O5. A manufacturing method of non-calcined alumina-silica brick for hot blast furnace or blast furnace shaft part includes: molding a kneaded product of particles including alumina, particles including silica, and a phosphate aqueous solution; and dehydrating the molded product at a temperature of 250°C or higher and 500°C or lower.SELECTED DRAWING: Figure 1

The invention discloses a hot-blast stove structure, a stove body manhole masonry and a hot-blast stove masonry method, and relates to the technical field of internal combustion hot-blast stoves, the hot-blast stove structure comprises a stove body and a gas pipeline connector, the gas pipeline structure is communicated with the interior of the stove body, and a material conveying channel is arranged at the gas pipeline connector; one end of the material conveying channel is communicated with the gas pipeline interface, and the other end is arranged on the ground; a portal frame is arranged at the vault of the furnace body and is provided with a hoisting piece; a metal protection layer is laid on the inner wall of the gas pipeline connector; the furnace body is sequentially provided with a gas pipeline connector, an air through opening, a furnace body manhole, a hot air outlet and a furnace top manhole from bottom to top. According to the hot blast stove, the material conveying channel and the gas pipeline connector are integrated, waste refractory material gravity conveying and new refractory material direct conveying are achieved, blocking and secondary carrying are avoided, and the construction efficiency is improved. The vault portal frame is matched with the multi-point hoisting piece to achieve material supply and construction progress synchronization, and the problems of construction interruption and resource waste are solved.

The utility model provides a top combustion type hot-blast stove, which can optimize the structure of the hot-blast stove on the premise of ensuring the combustion performance of the hot-blast stove by improving the structure of the top combustion type hot-blast stove. The top combustion type hot blast stove comprises a vault section located at the top end and an equal-diameter section connected to the lower side of the vault section, and the radial size of the vault section is gradually reduced from bottom to top. An annular air cavity is arranged around the central axis of the arch crown section, the annular air cavity is provided with two spaced arc-shaped cavity sections, one arc-shaped cavity section is used for being communicated with an air source to serve as an air cavity channel, and the other arc-shaped cavity section is used for being communicated with a coal gas source to serve as a coal gas cavity channel.

The utility model relates to the field of clay bricks, and provides a low-porosity high-thermal-shock clay brick for a hot blast stove, which comprises a brick body, the notch is formed in one side of the brick body, and two protruding blocks are fixedly arranged on the inner wall of the notch. When the brick is used, the bottom plate on one brick body is inserted into the notch in the other brick body, the two protruding blocks are further inserted into the two limiting grooves, the two brick bodies are connected together in the vertical direction, and therefore the brick is convenient to use; when the clay brick is used, a transverse plate is pulled to drive a square column to slide on the inner wall of a sliding groove, at the moment, a first fixing block on one brick body is inserted into a positioning groove in the other brick body, then the transverse plate is pushed to enable the square column to be inserted into a square groove, then the two brick bodies are connected together in the left-right direction, the two brick bodies are further connected together, and therefore when the clay brick is used, the operation is convenient. Two clay bricks can be connected together, so that the construction of the clay bricks is facilitated, and the practicability of the clay bricks is improved.

The invention relates to a masonry system, a masonry, a method of constructing a masonry and an aggregate for holding a molten metal.

The invention relates to the technical field of blast furnace hot blast stove processes, and discloses a method for improving the through hole rate of new and old checker bricks of a blast furnace hot blast stove, which comprises the following steps: step 1, cleaning the surfaces and checker holes of the old checker bricks; step 2, carrying out scanning modeling on the cleaned old checker bricks; 3, fully paving a first layer of new checker bricks based on the model; 4, detecting the through hole deviation of the lattice holes of the new and old lattice bricks, and marking the new lattice bricks with large deviation; 5, the marked new checker bricks are pulled out, and small checker bricks are adopted for transition stacking; sixthly, a second layer of new checker bricks are built, and the through hole rate is adjusted; and 7, new checker bricks on the third layer or above are built, the through hole rate is adjusted, and the through hole rate of the whole hot blast stove checker bricks from bottom to top is larger than or equal to 90%. According to the method, the three-dimensional shape data of the old checker bricks can be accurately obtained through the high-precision laser scanning equipment and the digital modeling technology, a reliable foundation is provided for laying of the new checker bricks, and it is ensured that the through hole rates of the new checker bricks and the old checker bricks are highly consistent.

The present invention relates to a construction method for partial replacement of checker bricks in a hot blast stove, including: Step 1, opening a discharging hole. According to the production status of the hot blast stove, determine the replacement range of the checker bricks, open a discharging hole at a preset position, and demolish the refractories to completely expose the checker bricks; Step 2, demolishing the old checker bricks. According to the demolition height of the checker bricks, determine the amount of materials to be discharged through the upper manhole or the baking furnace manhole. Demolish the checker bricks downward from the orientation of the discharging hole until the discharging hole is exposed, and further demolish the checker bricks in other orientations; Step 3, fabricating a closed chute. Fabricate a closed chute according to the height inside the furnace and the size of the checker bricks. The laying of the closed chute is from the upper manhole or the baking furnace manhole to the construction surface inside the furnace; Step 4, laying new checker bricks; Step 5, restoring the wall and demolishing the closed chute. The advantages of the present invention are reducing the opening of the furnace shell during the construction process, thereby reducing the potential hazards caused by the opening, improving the operation efficiency, greatly reducing the construction period, and lowering the construction cost.

Refractory inlay (1) for a refractory checker brick (2, 2.1, 2.2, 2.3) of a vertical regenerator (3), the refractory inlay (1) comprising a refractory inlay body (10), the refractory inlay body (10) comprising a refractory inlay body top surface (10t) and a refractory inlay body bottom surface (10b); a refractory inlay body front surface (10f) and a refractory inlay body rear surface (10r); a refractory inlay body first side surface (10.1) and a refractory inlay body second side surface (10.2); at least two refractory inlay shafts (11,12), namely a first refractory inlay shaft (11) and a second refractory inlay shaft (12), each refractory inlay shaft (11,12) comprising a refractory inlay shaft top surface (11t, 12t) and a refractory inlay shaft bottom surface (11b, 12b); a refractory inlay shaft front surface (11f, 12f) and a refractory inlay shaft rear surface (11r, 12r); a refractory inlay shaft first side surface (11.1, 12.1) and a refractory inlay shaft second side surface (11.2, 12.2); wherein the refractory inlay shaft second side surface (11.2) of the first refractory inlay shaft (11) is connected to the refractory inlay body first side surface (10.1); wherein the refractory inlay shaft first side surface (12.1) of the second refractory inlay shaft (12) is connected to the refractory inlay body second side surface (10.2); wherein the refractory inlay shaft bottom surfaces (11b, 12b) of the first refractory inlay shaft (11) and the second refractory inlay shaft (12) are configured to be suspended on a refractory checker brick top surface (2t) of a refractory checker brick (2).

To provide an apparatus and a method for investigating a brick for heat storage in a hot blast furnace capable of clearly determining a repair boundary of a deteriorated brick.SOLUTION: A device and a method for investigating a brick B for heat storage of a hot blast furnace 11 include: a detection part 2 which can be inserted into a canal hole C of the brick B and has a substantially circular cross-sectional shape orthogonal to the elongation direction of the canal hole C; and a support part 3 which has a maximum dimension in the same direction smaller than the maximum outer diameter of the detection part 2 in the direction orthogonal to the elongation direction of the canal hole C and is a strip extending in the elongation direction of the canal hole C and deformable in the direction intersecting the elongation direction.SELECTED DRAWING: Figure 3

A combustion control method for a hot blast stove including a combustion step of storing, in a regenerator, a quantity of heat input by combusting a mixed gas, and a blast sending step of generating hot blast by supplying cold blast into the regenerator and supplying the generated hot blast to a blast furnace includes the steps of: calculating an actual value of the quantity of heat; calculating a quantity of heat deprived of by the generation of the hot blast; calculating an actual value of thermal efficiency of the hot blast stove; calculating a quantity of heat to be input when hot blast is generated next time; calculating a quantity of the mixed gas to be supplied when hot blast is generated next time; and controlling the hot blast stove based on the calculated quantity of the mixed gas.

A flow guide part is arranged in a furnace body and can change the flow direction of most airflow at a cold air inlet, so that the cold air flow flows at a preset angle with the radial direction, the airflow can be uniformly distributed in a cold air chamber, and the phenomenon that the airflow is intensively distributed in the middle of the cold air chamber in the prior art is improved. Meanwhile, in consideration of the phenomenon that the circumferential airflow is possibly concentrated after the flow direction of the cold air flow is changed, the lattice holes of the heat accumulator are further arranged to be in a non-uniform-section mode, and the through-flow area of the second lattice holes far away from the center axis is smaller than that of the first lattice holes close to the center axis; in this way, airflow in the circumferential area of the cold air chamber can be forced to flow to the middle area of the cold air chamber, air distribution of the cold air chamber is uniform, the uniformity of airflow entering the heat storage chamber is improved, and the overall heat exchange efficiency of the heat storage body is improved.