48results about "Brick-hot blast stoves" patented technology

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 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.

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.

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.

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).

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.

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.

The invention relates to the technical field of ironmaking processes, in particular to a thermal insulation system and method for a silica brick hot blast stove during long-time damping down of a blast furnace. The system comprises a combustion fan, a blast furnace cold air pipeline, a coal gas supply unit, a silica brick hot blast stove body, a hot air header pipe, a reverse air supply connecting assembly and a flue discharge unit. A connecting pipeline of the reverse air supply connecting assembly is connected with the combustion fan and a blast furnace cold air pipeline, and the blast furnace cold air pipeline is communicated with the bottom of the heat storage chamber. The top of the regenerative chamber is connected with a hot air header pipe and a backflow damping down valve through a hot air valve, and a combustion chamber smoke outlet and a regenerative chamber waste gas outlet are connected with a flue discharge unit through a flue valve and a waste gas valve respectively. The reverse air supply flow channel is constructed, the furnace temperature is stabilized at 1150-1180 DEG C, and silica brick cracking is avoided; the problems of potential safety hazards and damage of silica bricks of traditional heat preservation are solved, additional oven baking is not needed, the oven starting time is shortened, the cost is reduced, and field application is adapted.

The present application relates to a kind of hot blast furnace with blast furnace gas as energy source, including furnace body, furnace body includes corrosion-resistant furnace shell, acid-resistant heat insulation layer, fiber buffer layer and working layer in turn from outside to inside, wherein, corrosion-resistant furnace shell has the performance of acid root corrosion resistance, acid-resistant heat insulation layer is used to heat insulation and block the contact of corrosive gas with corrosion-resistant furnace shell, fiber buffer layer is used to absorb the expansion displacement of working layer.The furnace body of the present application includes corrosion-resistant furnace shell, acid-resistant heat insulation layer, fiber buffer layer and working layer in turn from outside to inside, wherein, fiber buffer layer can absorb the expansion displacement of working layer, and reduce the total amount of hot blast transmitted outward through furnace body, acid-resistant heat insulation layer has good heat insulation effect, while reducing the contact of acid root with furnace shell, furnace shell uses corrosion-resistant furnace shell, so as to have good heat insulation effect, while having good corrosion resistance, so as to improve the durability of furnace shell.

The invention discloses a light-weight top combustion type hot blast stove, and relates to the technical field of blast furnace hot blast stoves, the outermost layer of the hot blast stove is a steel shell, a plurality of sections of parapet wall structures are sequentially arranged between a stove bottom and a stove top, and the innermost layers of the rest sections of parapet wall structures except the section connected with the stove top of the multi-section parapet wall structures are all working layer bricks; the distribution of the refractory fiber layer, the coating layer, the high-temperature heat insulation coating layer, the gas building wall and the gas ring cavity in the parapet wall structure is set according to the temperature distribution in the furnace. The purposes of accurately controlling the furnace shell surface temperature and effectively controlling the combustion temperature can be achieved, the energy utilization efficiency of the hot blast stove system is improved, and the cost is reduced.

The invention discloses a hot blast stove shell which comprises a shell body and a cover plate, the shell body comprises a body and a cover plate, the body is provided with a brick inlet hole, the brick inlet hole is located in a vault area of a hot blast stove, and the cover plate is connected with the body to cover the brick inlet hole; the reinforcing assembly comprises multiple first reinforcing plates and multiple second reinforcing plates, the multiple first reinforcing plates and the multiple second reinforcing plates are arranged, and the multiple first reinforcing plates are sequentially arranged on the shell in a winding mode at intervals and located in the arch crown area; the first reinforcing plates and the second reinforcing plates are distributed in a staggered mode.

A heat storage device, such as a hot blast stove (10), includes a regenerative checkerwork (14) of checker bricks (12) supported by a support assembly (16). According to one aspect of the invention, the support assembly (16) includes a load bearing structure (20) of refractory material and load bearing slabs of refractory material disposed on the load bearing structure (20) and configured and formed to support the checker bricks of the checkerwork (14).

The invention relates to an axial-free air heater, which comprises a burner system located at the top of a pre-chamber (1) having a chamber for mixing gas and air. The pre-chamber (1) has a jacket (2) with a lining, inside which there is an annular channel bounded by an inner annular wall (3) and an outer annular wall (4), thus forming a gas main (12). The lining of the pre-chamber (1) is supported on a metal ring beam (5), one wall of which is a continuation of the jacket (2), while the other forms a shell (7) of the vault-shaped part of the combustion chamber (6) and its bottom forms a support for the pre-chamber (1). The combustion chamber (6) together with the shell (7) and the lining (8) is arranged below the pre-chamber (1) and coaxially with it. The metal ring beam (5) is permanently connected with the jacket (2) and the shell (7) and is provided from above with a base plate (9), thus forming an air manifold (10). The outer annular wall (4) has openings with pipes (18) for supplying gas. Gas outlets (13) are arranged in a row at the top of the inner annular wall (3) and gas holes (14) are arranged at the bottom of the inner annular wall (3). The invention improves the operational safety and reliability by increasing the stability and durability of the axial-free air heater.

The utility model discloses an energy-saving efficient top combustion type hot blast stove, which belongs to the technical field of hot blast stoves and specifically comprises a stove body, a combustion chamber, a heat storage chamber and a mixing chamber are arranged in the stove body, a hot air pipeline is arranged on the side wall of the combustion chamber, and a smoke pipeline and a cold air pipeline are arranged on the side wall of the heat storage chamber. A gas pipeline and an air pipeline are arranged on the side wall of the mixing chamber; the air inlet end of the air pipeline is connected with an air filtering mechanism, the air filtering mechanism comprises a filtering pipeline, the filtering pipeline is communicated with the air pipeline, the air inlet end of the filtering pipeline is detachably connected with a filtering cover, and the filtering cover is fixedly connected with a filtering cylinder extending into the filtering pipeline; a top shell of the filter cartridge is detachably connected with a mounting frame, and the mounting frame is fixedly connected with a negative pressure fan; particles or dust in the air can be filtered, particulate matters such as dust and impurities in the air are prevented from directly entering the combustion chamber, and the combustion efficiency is improved.

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), wherein the refractory inlay body front surface (10f) and / or the refractory inlay body rear surface (10r) comprise grooves (10g).

The invention relates to the technical field of blast furnace hot blast stoves in the metallurgical industry, in particular to a grate-free high-air-temperature top combustion 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; cooling pipes are arranged at the air inlet and the coal gas inlet; the support body is of a porous 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 support body 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 invention relates to the technical field of hot-blast stove heat preservation, in particular to a hot-blast stove which comprises a heat storage chamber. A combustion chamber is arranged at the top of the heat storage chamber; the combustion chamber comprises a vault; the combustion chamber is connected with a gas pipeline, a combustion air pipeline and a hot air pipeline; the heat storage chamber is connected with a cold air pipeline and a flue gas pipeline; a back flushing pipeline is connected between the combustion-supporting air pipeline and the flue gas pipeline; a back-blowing pipeline is installed on a combustion-supporting air pipeline and a flue gas pipeline, the back-blowing pipeline is connected with the combustion-supporting air pipeline and the flue gas pipeline, and combustion-supporting air is input into the flue gas pipeline from the back-blowing pipeline by utilizing air supply of a combustion-supporting fan to simulate air supply of a blast furnace fan. Therefore, high-temperature flue gas in the heat storage chamber is blown into the combustion chamber to heat the vault, and the purpose of maintaining the temperature of the vault is achieved. And meanwhile, high-temperature flue gas at the bottom of the heat storage chamber is upwards blown into the combustion chamber by combustion-supporting air, so that the temperature of a flue gas pipeline is effectively reduced.