30results 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 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 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 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 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 invention relates to a masonry system, a masonry, a method of constructing a masonry and an aggregate for holding a molten metal.

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).

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.

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.

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.

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 application discloses a combustion device and belongs to the technical field of blast furnace ironmaking. The combustion device comprises a fuel channel with a fuel inlet and a fuel cavity, the fuel inlet is communicated with the fuel cavity, and the fuel inlet is used for passing fuel into the fuel cavity; a baffle channel is arranged at one end of the fuel cavity away from the fuel inlet and is obliquely arranged towards the middle part of the fuel channel; an auxiliary combustion channel has an auxiliary combustion agent inlet and an auxiliary combustion cavity, the auxiliary combustion agent inlet and the auxiliary combustion agent outlet are communicated with the auxiliary combustion cavity; a mixing channel has a combustion cavity, the fuel channel is communicated with the combustion cavity through the baffle channel, and the auxiliary combustion channel is communicated with the combustion cavity, so that the fuel and the auxiliary combustion agent are mixed in the combustion cavity. The baffle channel is obliquely arranged towards the middle part of the fuel channel, when the fuel passes through the baffle channel and enters the combustion cavity, the outlet of the baffle channel becomes smaller, so that the fuel can be uniformly mixed with the auxiliary combustion agent, the situation that a large amount of carbon monoxide is contained in flue gas after combustion due to insufficient combustion is reduced, and the harm of the flue gas is reduced.

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.

The utility model relates to the technical field of blast furnace metallurgical equipment, in particular to an internal combustion type hot blast stove. The embodiment of the utility model provides an internal combustion type hot-blast stove. The internal combustion type hot-blast stove comprises a hot-blast stove body, a first partition wall and a combustor. The hot-blast stove body is provided with a cavity, the first partition wall is arranged in the cavity to divide the cavity into a combustion chamber and a heat storage chamber, the combustor is provided with a gas channel and a gas inlet communicated with the gas channel, the gas channel is arranged in the combustion chamber and adjacent to the first partition wall, and the gas inlet is formed in the side, away from the first partition wall, of the gas channel. The burner comprises a coal gas guide plate which is arranged on the side, close to the first partition wall, in the coal gas channel, the coal gas guide plate and the coal gas inlet are correspondingly arranged, and the coal gas guide plate can change the jet flow direction of coal gas entering from the coal gas inlet. According to the internal combustion type hot blast stove, the situation that the first partition wall is prone to inclination, series leakage, short circuit and even collapse can be improved.

The utility model provides a catenary staggered top-spraying upper-outlet top combustion hot blast stove which comprises a stove body. The premixing box is slidably mounted at the top of the outer surface of the furnace body, a threaded block is fixedly mounted on one side of the outer surface of the premixing box, and a vault is fixedly mounted at the top of the premixing box. According to the catenary staggered top-spraying and top-outlet top combustion hot blast stove, a thread is rotated through a threaded rod to be meshed with a threaded block, the threaded block drives a premixing box and a vault to slide on the surface of a stove body, and the vault moves upwards and drives a collecting device to be attached to the inner cavity wall of a heat storage chamber to move upwards at the same time; the collecting box scrapes and shovels combustion particles remaining on the surface of the inner cavity wall of the heat storage chamber, the scraped combustion particles are collected in the collecting groove along with upward movement of the collecting device, maintenance personnel can conveniently collect and clean the combustion particles collected by the collecting groove along with separation of the vault and the furnace body, the labor intensity of operators is relieved, and the working efficiency is improved. And the maintenance convenience of the hot-blast stove is improved.

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.

The invention relates to the technical field of hot blast stoves, in particular to a Kalujin top combustion type hot blast stove with a novel combustion chamber structure, which comprises a pre-combustion chamber, a combustion chamber, a heat storage chamber and a grate area, and a fixed flow guide element is arranged in the combustion chamber and positioned in the area above the top of the heat storage chamber; the flow guide element is a retaining wall, the cross section of the flow guide element is preferably in a cross shape, a T shape or a star shape, and the flow guide element is constructed to be capable of segmenting and disturbing strong rotating air flow descending from the pre-combustion chamber and flowing through the position where the flow guide element is located, effectively weakening the rotating strength of the air flow and guiding the main flow direction of the air flow to face the top of the heat storage chamber more vertically. The special-shaped flow guide structure is arranged at the key position of the downstream of the combustion chamber, the problems that due to efficient rotational flow combustion of a Kalugin type hot blast stove, the inlet flow field of the heat storage chamber is not uniform, and flue gas crosses are ingeniously solved, and therefore the heating uniformity of checker bricks of the heat storage chamber and the temperature of a hot air outlet are remarkably improved, the structure is simple, and the effect is remarkable.

The invention provides a hot blast stove combustion control method and device, electronic equipment and a storage medium, and belongs to the technical field of intelligent control. The method comprises the steps that a heat storage coefficient corresponding to each data acquisition moment is calculated based on the combustion duration, the vault temperature change rate and the flue temperature change rate acquired at each data acquisition moment, obtaining a heat storage coefficient sequence corresponding to all data acquisition moments; based on the coal gas flow sequence, the coal gas pressure sequence and the heat storage coefficient sequence corresponding to all the data acquisition moments, target coal gas pressure is obtained through prediction of a target LSTM model, and a coal gas pressure change value is calculated based on the target coal gas pressure and the coal gas pressure corresponding to the current moment; determining a target air-fuel ratio based on the target gas pressure, the heat storage coefficient corresponding to the current moment, the flue residual oxygen value and the air-fuel ratio; determining a target air valve opening degree of the hot-blast stove based on the target air-fuel ratio; the target air valve opening is used for controlling an air valve of the hot blast stove. The adjusting accuracy of the air-fuel ratio of the hot blast stove can be improved.

The utility model relates to the technical field of iron and steel smelting blast furnaces, in particular to a top combustion type hot blast stove capable of stabilizing flame combustion, which comprises a stove body, and the stove body comprises a heat storage section and a combustion section. The mixed air inlet section is arranged at the top of the heat storage section in a sleeving manner; the combustor is arranged on the inner wall of the combustion chamber; the temperature measuring assembly is positioned above the combustor; the heat storage lattice bricks are arranged in the heat storage chamber; the flame heat gathering assembly is arranged at the top of the heat storage lattice brick, the flame heat gathering assembly is located in the combustion chamber, the flame heat gathering assembly comprises a flow guide shell and a heat gathering lattice brick, the heat gathering lattice brick is arranged in the flow guide shell in a filling mode, and a plurality of ventilation holes are formed in the outer wall of the flow guide shell. By stabilizing the flame combustion direction, it is ensured that the center flame is close to a flame temperature detection point, the vault temperature is accurately measured, and the safety of the hot-blast stove is improved.

The utility model relates to the technical field of blast furnace ironmaking, and discloses a blast furnace hot blast stove for fuel gas mixing, which comprises a stove body, a gas supply end of the stove body is communicated with a mixing box, a mixing component is connected in the mixing box, and one side of the mixing box far away from the stove body is communicated with an air inlet pipe and a fuel gas inlet pipe. According to the blast furnace hot blast stove for fuel gas mixing, air and fuel gas are injected into the mixing box through the inlet pipes which work synchronously and are fully mixed through the mixing assembly in the mixing box. Then, the mixed gas is guided into the furnace body to be combusted, and it is ensured that the fuel gas is completely combusted. The process effectively reduces the generation of harmful gases such as carbon monoxide, and further improves the use safety of the hot blast stove.

A heat storage device such as a hot blast stove including a heat regeneration checkerwork made of checker bricks, the checkerwork being supported by a support assembly (16). In accordance with an aspect of the present disclosure, the support assembly having a carrier structure made of refractory material and carrier floor also made of refractory material, the carrier floor resting on the carrier structure and being arranged and formed to carry the checker bricks of the checkerwork.

The invention relates to the technical field of metallurgical industry equipment, and discloses a low-pollutant-emission oxygen-enriched combustion efficient hot-blast stove system which comprises a hot-blast stove. The waste heat recycling station is connected to a flue gas outlet of the hot blast stove through a first flue gas pipeline; the flue gas processor is connected to a flue gas outlet of the waste heat recovery station through a second flue gas pipeline; an inlet of the circulating fan is connected to an outlet of the flue gas treatment device through a pipeline; an inlet of the air blower is connected with a combustion-supporting air source and an outlet of the circulating fan; the pure oxygen station is connected to an outlet pipeline of the air blower through an oxygen pipeline; an outlet of the air blower is connected to a mixed gas inlet of the hot blast stove through a mixed gas pipeline and used for conveying mixed gas to the combustion chamber to participate in combustion. By integrating the flue gas denitrification technology, the waste heat recovery technology and the oxygen-enriched combustion technology, the ultralow NOx emission is achieved, meanwhile, the heat efficiency of the system is improved, and high-concentration CO2 flue gas is generated.

The application discloses a kind of blast furnace hot blast stove vault temperature control method and device, the method includes: using accurate timing function to collect the vault temperature data of multiple periods, collect the residual oxygen content of waste gas of hot blast stove, compare target period vault temperature variation trend and waste residual oxygen content with preset standard, adjust the air-fuel ratio of hot blast stove according to comparison result;Add weight to the calculation factor of air-fuel ratio, adjust air-fuel ratio according to air-fuel ratio calculation factor weight, collect vault temperature after adjusting air-fuel ratio, calculate the temperature variation trend of current sampling time, compare the temperature variation trend of current sampling time with vault temperature standard, modify the weight of air-fuel ratio calculation factor according to comparison result, until the vault temperature after adjusting air-fuel ratio according to the weight of modified air-fuel ratio calculation factor meets vault temperature standard, the application makes hot blast stove furnace burning state reach optimum, effectively guarantee blast furnace production and operation.