600results about "Blast furnace components" patented technology

The invention relates to a modified chrome corundum ramming material and a preparation and construction process thereof, and belongs to the technical field of chrome corundum ramming materials. The ramming material comprises a material A, a material B and a material C, wherein the material A comprises chrome corundum aggregate, titanium dioxide coated aluminum oxide microspheres, calcium sulfide dehydrate and silicon carbide porous microspheres; the material B comprises chromium oxide-zirconium oxide composite nano powder, sodium thiosulfate pentahydrate, tricalcium phosphate and hexagonal boron nitride flaky crystals; and the material C comprises an aluminum dihydrogen phosphate-magnesium hydroxide compound, a calcium fluoride-aluminum oxide co-melt and a silane coupling agent. The preparation process comprises the steps of pretreatment of all the components, preparation of composite powder and layered preparation. The construction process comprises the steps of pretreatment, wet-process mixing, layered ramming, negative-pressure permeation, medium-temperature reaction, spraying curing, integral firing and the like. Generation of hexavalent chromium can be effectively inhibited, the thermal shock resistance, the mechanical strength and the heat-conducting property of the material are remarkably improved, and the material has the advantages of being good in environment friendliness, long in service life, excellent in construction performance and the like.

A cleaning device suitable for a blast furnace top blow-off valve port comprises a lifting part, a rotating part, a rotating part and a scraping and sweeping part. The lifting part is arranged on a blast furnace top platform and located on one side of the blow-off valve. The rotating part is arranged on the lifting part; the rotating part is arranged on the rotating part; and the scraping and sweeping part is arranged on the rotating part. The blow-off valve opening cleaning device improves the blow-off valve opening cleaning efficiency and reduces the labor intensity of workers.

A slag barrier plate for a side-blown melting furnace with a melting bath, characterized in that it comprises: a slag barrier unit (1) with a plate body (11) for holding back molten slag; a heat dissipation unit (2) comprising: a cooling water jacket (21) extending through the interior of the plate body (11) to continuously introduce cooling medium into the plate body (11) to lower its temperature; a distributor arrangement (22) arranged at the end of the cooling water jacket (21) to introduce the cooling medium into the cooling water jacket (21).

The utility model discloses a quick cleaning and purging device for an iron notch mud sleeve, which relates to the technical field of metallurgical equipment and comprises a scraping structure, a connecting rod structure, a butt joint structure, a connecting structure and an air inlet structure. The scraping structure comprises a connecting sleeve, a first threaded hole, a scraping plate, a drill bit and an exhaust hole, the threaded hole is formed in one side of the connecting sleeve and used for being in butt joint with the connecting rod body, the drill bit is fixed to the other side of the connecting sleeve and used for finding the iron notch center and fixing the scraping plate, and the exhaust hole is used for blowing and cleaning residues. The connecting rod structure is connected with the connecting structure through the butt joint structure, and the connecting structure is connected with the air inlet structure assisting in air inlet and water inlet. The air inlet structure comprises an air guide ring, an oil seal ring and an electromagnetic valve, and compressed air is connected to be matched with the butt joint structure to assist in cleaning iron notch residues and residues of the whole rod body. The device is simple and stable in structure, assists cleaning through compressed air, and has the advantages of simplicity in operation, rapidness and high efficiency.

The utility model discloses a numerical control oxygen lance for blowing in an iron-making blast furnace, which comprises a tubular lance body, and the tubular lance body comprises a lance body front section and a lance body rear section; wherein the gun body front section is used for being inserted into a blast furnace tap hole and stretching into a blast furnace hearth, and the gun body rear section is located outside the tap hole; an air inlet connector is formed in the rear section of the gun body; the rear section of the tubular gun body is provided with a connecting plate, the front end of the connecting plate blocks the rear section of the tubular gun body, and the rear end of the connecting plate is provided with a connector; wherein the tubular gun body is used for conveying mixed gas introduced from the gas inlet connector into a blast furnace hearth from the front section of the gun body; the blast furnace taphole is provided with the hole, and the tubular gun body extends into the hole, so that a sufficient gas source can be directly provided for the combustion of coke at the bottom of the blast furnace, the sufficient combustion of the coke is ensured, and the temperature of the blast furnace is quickly increased.

The application discloses a movable furnace hearth with an accelerated heating function and belongs to the technical field of a blast furnace hearth. The movable furnace hearth comprises a furnace hearth body, a moving base, a movable wheel with adjustable start and stop, a ventilation seat, a height-adjustable heating and cleaning integrated assembly, a multi-section hollow pipeline, a winding mechanism and a hammering, piercing and fire spraying integrated assembly. The moving base is fixedly arranged at the bottom of the furnace hearth body. The movable wheel with adjustable start and stop is fixedly installed on the outer side of the moving base in a ring array distribution mode. The ventilation seat is welded on the outer wall of one side of the bottom of the furnace hearth body. The multi-section hollow pipeline is fixedly installed at the center position of the bottom of the inner cavity of the furnace hearth body. The height-adjustable heating and cleaning integrated assembly is fixedly installed on the top of the multi-section hollow pipeline. The winding mechanism is arranged on the top of the height-adjustable heating and cleaning integrated assembly. The application has the advantages of convenience in movement, uniform heating effect, fast heating speed, convenience in internal impurity crushing and cleaning and suitability for promotion and use.

The invention relates to the field of iron and steel metallurgy blast furnace ironmaking, in particular to a method for activating a hearth through blast furnace operation, which comprises the following steps of: establishing a reasonable lower air supply system and an upper charging system, balancing edge and middle airflow distribution, stabilizing a heat system and a slagging system, implementing low-silicon smelting, improving stokehole operation and the like. The temperature of the furnace bottom and the temperature of each layer of the side wall of the hearth are stable, uniform and controllable. A blast furnace operator operates the blast furnace by implementing the technology, the effect of activating the hearth can be achieved, long-term stable and smooth operation of the furnace condition is promoted, and safe, economical, efficient and long-life production of the blast furnace with the stable upper part and the active hearth is achieved.

The blast furnace front oxygen enrichment system comprises a low-pressure oxygen pipeline laid between an oxygen station and an iron making plant, the low-pressure oxygen pipeline is connected with a blast furnace blower through an oxygen branch pipe, an air outlet of the blast furnace blower is communicated with an air inlet of a blast furnace, and the oxygen branch pipe is provided with a flame arrester and a second manual stop valve. A security nitrogen pipe is connected between the flame arrester and the second manual cut-off valve, and a stop valve, a nitrogen buffer tank and a nitrogen quick cut-off valve are sequentially arranged on the security nitrogen pipe in the airflow direction; the oxygen analyzer monitors the oxygen content in the oxygen branch pipe in real time and transmits a monitored value to the PLC, the PLC judges whether the oxygen enrichment rate of a preset instruction is reached or not, and the flow regulating valve is regulated through the PLC; the system is simple in structure, reasonable in design, convenient to implement, capable of being effectively applied to blast furnace smelting, capable of saving electric energy and production cost, good in using effect and convenient to popularize and use.

An ironmaking method comprising the production of hot metal (2) and of a blast furnace top gas (10), the method comprising the steps of capturing at least a part of the top gas (10), separating CO2 from the captured top gas (10) so as to produce a CO2-rich stream (12) and a CO2-lean stream (11), mixing the CO2-rich stream (12) with a H2 makeup stream (30) and subjecting the obtained CO2 / H2 gas mixture to a reverse water gas shift reaction in a reactor (3) to produce a reducing stream (13) comprising CO and H2, separating H2 from the reducing stream to produce a CO- rich stream (14) and an H2-rich stream (15), mixing the H2-rich stream (15) with the CO2-rich stream (12) or with the CO2 / H2 gas mixture in the reactor (3) and subjecting the obtained gas mixture to the reverse water gas shift reaction and feeding at least a portion of the CO-rich stream 14 (13) to at least one chemical or biochemical plant (4) to produce one or more chemical products (16).

The invention relates to a blast furnace wall bonding treatment method which comprises the following steps: S1, controlling the charging proportion of high-zinc furnace charge, discharging zinc by utilizing central airflow, and reducing the gathering of zinc in the furnace; s2, the air temperature and the oxygen enrichment rate are increased, so that the theoretical combustion temperature in the furnace is increased, the combustion rate of pulverized coal is increased, the yield of the blast furnace is increased, fuel consumption is reduced, and the retention time of the zinc element in the blast furnace is shortened; s3, increasing the operation pressure difference; on the basis of high pressure difference, full-wind operation is carried out, and a high wind speed is kept, so that enough central airflow can be ensured in the blast furnace; s4, the furnace temperature and the air inlet speed are increased; the blast furnace wall body stickers are severely scoured by the airflow, so that the stickers rapidly fall off; and S5, wall body temperature monitoring. The problems of wall bonding, nodulation and the like in the long-term operation process of the blast furnace can be effectively solved, so that the operation efficiency of the blast furnace is improved, and the service life is prolonged.

The invention relates to the technical field of adsorption, in particular to a device and process for coupling pressure swing adsorption carbon capture and gas combustion waste heat utilization, the device comprises a temperature swing adsorption pretreatment unit and a pressure swing adsorption unit, the temperature swing adsorption pretreatment unit is used for adsorbing and removing impurity components in blast furnace gas, and the pressure swing adsorption unit is used for adsorbing and removing the impurity components in the blast furnace gas; then, high-purity CO2 product gas is obtained through a pressure swing adsorption unit; the residual decarbonized coal gas adsorbed by the pressure swing adsorption unit is converted into high-temperature flue gas, and then the high-temperature flue gas enters the temperature swing adsorption pretreatment unit again for heat recovery, and meanwhile, the heat is utilized to desorb impurity components of the adsorbed blast furnace gas. According to the invention, blast furnace gas pretreatment and a CO2 capture system are combined, so that the recycling of blast furnace gas and the efficient capture of CO2 are realized, the capture efficiency of CO2 is improved, the energy waste is reduced, and the cyclic operation of equipment is realized.

The present application relates to a kind of judgment method and processing method of blast furnace suspension material position, the judgment method of blast furnace suspension material position is used to judge the position of blast furnace suspension material, the processing method of blast furnace suspension material position, including if upper suspension material control wind speed and increase the coke of maintaining material surface shape, " sit material " by different ways is selected according to different suspension material position, quantitative calculation supplementary net coke weight, determine the distribution of net coke increase way.The present application has the advantages that: different furnace condition recovery method, parameter setting rule, coke adding method are invented for different suspension material position, improve the recovery speed after blast furnace suspension material;In upper suspension material, maintaining material surface shape can speed up subsequent wind process, reduce the possibility of secondary collapse, slide material accident;According to different suspension material position, different ways are selected to reduce wind " sit material ", according to different suspension material position, corresponding wind reduction method is adopted, can as far as possible speed up furnace condition recovery process, realize the optimization of suspension material recovery process.

The utility model discloses a blast furnace damping-down gas recovery system which comprises an ejection medium source and an ejector, the ejector is connected with a blast furnace and the ejection medium source, a gas outlet of the ejector is connected with a low-pressure gas conveying header pipe through a gas recovery pipe, and the blast furnace damping-down gas recovery system further comprises a high-calorific-value gas source; the high-calorific-value fuel gas source is connected with the coal gas recovery pipe through a fuel gas supply header pipe, the high-calorific-value fuel gas source is used for supplying high-calorific-value fuel gas to the coal gas recovery pipe, and the calorific value of the high-calorific-value fuel gas is higher than that of the blast furnace damping-down coal gas recovered by the coal gas recovery pipe. When the blast furnace damping-down gas recycling system is applied, the heat value of the recycled blast furnace damping-down gas can be increased, burners of downstream users are not prone to flameout, and the safety of recycling of the blast furnace damping-down gas is improved.

The invention belongs to the technical field of carbon neutralization, and discloses a synergistic efficient low-carbon electrolysis water and total-oxygen blast furnace coupled low-carbon steel coproduction system. Comprising an electrolyzed water system; a blast gas inlet of the total-oxygen blast furnace system is connected with an oxygen outlet of the electrolyzed water system, and the total-oxygen blast furnace system is used for receiving oxygen to generate top circulating coal gas rich in carbon monoxide and carbon dioxide; an inlet of the coal gas purification system is connected with a circulating coal gas outlet of the total-oxygen blast furnace system; a first inlet of the methanol synthesis system is connected with a hydrogen outlet of the water electrolysis system, a second inlet of the methanol synthesis system is connected with a purified gas outlet of the gas purification system, and the methanol synthesis system is used for receiving hydrogen and purified circulating gas to generate methanol; the circulating gas heating system is arranged in a circulating gas path between the gas purification system and the total-oxygen blast furnace system and is used for heating circulating gas returned to the blast furnace; an inlet of the flue gas decarburization system is connected with a combustion flue gas outlet of the circulating gas heating system, and the flue gas decarburization system is used for conveying carbon dioxide in the flue gas to the second inlet.

Apparatus for the production of molten iron including a metallurgical vessel, having a surrounding wall, a cyclone part provided on top of a smelt reduction part, the cyclone part being in open connection with the smelt reduction part and having at least one supply apparatus around the circumference of the surrounding wall adjusted to introduce oxygen gas into the cyclone part, wherein the at least one supply apparatus is further adjusted to introduce a mixture of oxygen gas and a combustible gas.

Disclosed herein are methods and systems for valuing carbon monoxide emissions from a metallurgical furnace to high-value low-carbon footprint chemicals using carbon monoxide electrolysis. The disclosed method comprises: operating a metallurgical furnace; obtaining a volume of carbon monoxide in relation to the operation of the metallurgical furnace; supplying the volume of carbon monoxide to a cathode region of a carbon monoxide electrolyser for use as a reduction substrate; and using the carbon monoxide electrolyser, the reducing substrate, and the oxidizing substrate to generate a volume of the generated chemical. The volume of the generated chemical is at least one of a volume of a hydrocarbon, a volume of an organic acid, a volume of an alcohol, a volume of an olefin, and a volume of an N-rich organic compound.

A blast furnace operation method according to the present invention is a blast furnace operation method of blowing oxygen gas and a reducing agent containing methane gas into a blast furnace from a tuyere of the blast furnace includes blowing preheating gas having an amount of carried heat greater than or equal to a predetermined amount of heat set in accordance with a blowing amount of the methane gas into the blast furnace from a gas blowing portion provided above the tuyere of the blast furnace in a case where an oxygen concentration in the oxygen gas is 80 vol% or more.

The utility model discloses a bidirectional impact hydraulic iron notch drill which comprises a forward impact mechanism, a backward impact mechanism and an output shaft. The retreating impact mechanism comprises a retreating impact body and a retreating impact ring, retreating hydraulic cavities are formed in the retreating impact body in the length direction, the retreating impact ring is arranged in the retreating hydraulic cavities, and the retreating hydraulic cavities comprise the first retreating hydraulic cavity and the second retreating hydraulic cavity; the retreating impact ring comprises a first impact ring body and a second impact ring body, the first impact ring body and the second impact ring body are integrally formed, the connecting position of the first impact ring body and the second impact ring body is in a slope shape, and the outer diameter of the second impact ring body is equal to the diameter of the second retreating hydraulic cavity. The outer diameter of the first impact ring is smaller than the diameter of the first retreating hydraulic cavity. The hydraulic iron notch drill solves the technical problems that in the technical field of ferrous metallurgy, a traditional iron notch drill is low in efficiency and large in application limitation.

The invention relates to a combined system for producing steel, comprising a blast furnace (1) for producing pig iron, a converter (2) for producing crude steel and a gas line system for gases, said system operating when pig iron and / or crude steel is being produced. According to the invention, said combined system also comprises a chemical or a biotechnology system (11) which is connected to the gas line system, in addition to a system (21) for generating hydrogen. Said system (21) for generating hydrogen is connected to the gas line system by means of a hydrogen-conducting line. The invention also relates to a method for operating the combined system.

The utility model relates to the technical field of blast furnaces, and discloses a system for improving the coal injection reliability of a blast furnace, which comprises two blast furnace systems, a powder making device; the pulverized coal bunker is communicated with the pulverizing device; the at least three groups of injection tanks are communicated with the pulverized coal bunker; one end of the coal injection header pipe is communicated with the injection tank, and the other end of the coal injection header pipe is communicated with the blast furnace body; and one end of the coal injection standby pipe is communicated with the injection tank, and the other end of the coal injection standby pipe is communicated with a coal injection header pipe in the other blast furnace system. By means of the system for improving the coal injection reliability of the blast furnace, the continuity and reliability of pulverized coal supply in the blast furnace smelting production process can be improved.

The application relates to a modified chrome-corundum ramming mixture and a preparation and construction process, and belongs to the technical field of chrome-corundum ramming mixtures. The ramming mixture comprises A material, B material and C material, the A material comprises chrome-corundum aggregates, titanium dioxide-coated alumina microspheres, calcium sulfide dihydrate and porous silicon carbide microspheres; the B material comprises chromium oxide-zirconium oxide composite nano powder, sodium thiosulfate pentahydrate, tricalcium phosphate and hexagonal boron nitride flaky crystals; and the C material comprises an aluminum dihydrogen phosphate-magnesium hydroxide compound, a calcium fluoride-alumina eutectic body and a silane coupling agent. The preparation process comprises pretreatment of components, preparation of composite powder and layered preparation; and the construction process comprises the steps of pretreatment, wet mixing, layered ramming, negative pressure infiltration, medium-temperature reaction, spraying and curing and overall sintering. The application can effectively inhibit the generation of hexavalent chromium, significantly improve the thermal shock resistance, mechanical strength and heat conduction performance of the material, and has the advantages of good environmental protection, long service life, excellent construction performance and the like.

The present disclosure relates to a process for producing sponge iron from iron ore, comprising the steps of: - charging iron ore into a direct reduction shaft (211), - introducing a hydrogen-rich reducing gas (215) into the direct reduction shaft to reduce the iron ore and produce sponge iron (209), - removing a top gas (216) from the direct reduction shaft, - splitting the top gas into a recycle stream (218) and an extract stream (256), - processing the extract stream through a separation unit (257) to provide a hydrogen-rich off-stream (258) and an inerts-rich off-stream (259), - introducing the recycle stream and the hydrogen-rich off-stream into the direct reduction shaft as constituent parts of the hydrogen-rich reducing gas. The present disclosure further relates to a system for producing sponge iron.

[Problem] To provide a production device for a carbon material, a production system for a carbon material, and a production method for a carbon material that make it possible to efficiently produce a carbon material from carbon dioxide. [Solution] One aspect of the present invention provides a production device for a carbon material. The production device comprises a first reaction unit that produces carbon monoxide from carbon dioxide, a second reaction unit that produces a carbon material from carbon monoxide, and a gas line that connects the first reaction unit and the second reaction unit. The first reaction unit has at least one reactor that contains a reducing agent. By contact with a starting material gas that includes carbon dioxide, the reducing agent reduces the carbon dioxide to carbon monoxide and is oxidized, and by contact with a reducing gas that includes a reducing substance, the oxidized reducing agent is reduced.

The utility model discloses a novel upper sealing valve disc device of a blast furnace, which relates to the technical field of sealing valve discs, and comprises a valve disc body, a rubber ring and a pressing piece, the working surface of the valve disc body is provided with an annular groove, and the cross section area of the annular groove is a parallelogram; the rubber ring is used for being placed in the annular groove, and the shape of the rubber ring is matched with that of the annular groove; the pressing piece is detachably and fixedly connected with the valve disc body and can press the top face of the side, close to the center of the valve disc body, of the rubber ring into the annular groove, the structure is simple, use is convenient, and the replacement efficiency of the sealing rubber ring is effectively improved.

The utility model provides a device for feeding CDQ powder in blast furnace injection and a powder making system, which belong to the technical field of blast furnace injection powder making, and comprise a fine powder bin, a coarse powder bin and a powder making pipe group, the fine powder bin is used for storing fine CDQ powder; the coarse powder bin is used for storing coarse CDQ powder; the pulverizing pipe set comprises a coarse powder conveying branch pipe, a fine powder conveying branch pipe, a powder collecting box body and a coal mill, the fine powder conveying branch pipe and the coarse powder conveying branch pipe are both connected with the powder collecting box body, the coal mill is arranged on the coarse powder conveying branch pipe, and CDQ powder enters the powder collecting box body after being ground by the coal mill; wherein the number of the powder making pipe sets is at least two, switching assemblies are arranged between the fine powder bin and the powder making pipe sets and between the coarse powder bin and the powder making pipe sets, the fine powder bin and the coarse powder bin are connected with the powder making pipe sets through the switching assemblies respectively, and the switching assemblies are used for controlling connection and disconnection between the fine powder bin and the powder making pipe sets and between the coarse powder bin and the powder making pipe sets. In this way, the situations that fine CDQ powder which does not need to be ground enters the coal mill, energy is wasted, the coal mill is abraded and the like can be avoided.

The invention discloses a furnace top gas cyclic reforming process and system, and the reforming process comprises the following steps: S1, heating furnace top gas generated by a blast furnace to 1000-1200 DEG C to obtain high-temperature gas; s2, mixing the high-temperature coal gas with coal, and carrying out electromagnetic induction heating coal gas reforming reaction to generate reduced coal gas which is 900-1000 DEG C and contains CO and H2; s3, performing plasma heating on the reduced gas to 1400-1800 DEG C to obtain high-temperature reduced gas; s4, recycling the high-temperature reduction coal gas to the lower part of the blast furnace for circular treatment; according to the method, a carbon capture device of a conventional oxygen blast furnace and a top combustion type gas heating furnace and a CO2 removal device of a carbon circulation blast furnace are replaced by circular reforming of the furnace top gas, so that the energy consumption and the equipment investment of the technological process are reduced.

Provided is a blast furnace operation method capable of further reducing the amount of carbon dioxide discharged from a blast furnace under a stable operation. A first reducing gas containing carbon monoxide and a second reducing gas containing at least one among hydrocarbon and hydrogen are used as blowing reduction materials, and the first reducing gas is heated before blowing into the inside of the blast furnace.

The blast furnace feeding device comprises a screening mechanism and a feeding mechanism, the screening mechanism comprises a screening shell, a filter plate is arranged in the screening shell, a partition plate is arranged in the screening shell, and the filter plate and the partition plate are matched to divide the interior of the screening shell into a fuel channel and a dust channel. A buffering assembly is arranged in a fuel channel of the screening shell, the feeding mechanism comprises a feeding shell, and a conveying crawler belt is arranged in the feeding shell. By arranging the screening mechanism and the feeding mechanism, dust and fine particles in the coal can be filtered and screened while the coal is conveyed into the blast furnace, so that it is guaranteed that all the coal entering the blast furnace is large-particle coal, and due to the fact that the buffering assembly is arranged in the fuel channel, the coal conveying efficiency is improved. The collision strength in the coal conveying process can be effectively reduced, so that dust and small-particle coal are reduced as much as possible, and normal production of the blast furnace is guaranteed.

The utility model discloses an ironmaking blast furnace cleaning device, which belongs to the field of ironmaking and comprises a furnace mouth slag cleaning component and a fixing disc for fixing the bottom surface of the furnace mouth slag cleaning component. And the furnace mouth slag removal assembly comprises a rotating motor penetrating through the fixed disc, a rotating disc connected with an output shaft of the rotating motor through a connecting key, and a scraper translation assembly located in the rotating disc. Compared with the prior art, the slag removing device has the advantages that the scraper is replaced by the detachable grinding rod, the slag removing motor is used for driving the detachable grinding rod, when the rotating motor drives the fixed disc to rotate, the detachable grinding rod can cut slag like machining of a milling machine, the slag is ground into powder or small particles through cutting, and therefore the slag removing device is convenient to use. The slag can be poured out easily after cleaning is completed, and compared with a scraper, the detachable polishing rod structure is firmer and more durable.

The invention relates to a direct reduction plant with at least one reactor which is equipped with a refractory material.