CN115198043A - Low-carbon smelting system and method based on coupling of blast furnace-steel furnace process and carbon cycle - Google Patents
Low-carbon smelting system and method based on coupling of blast furnace-steel furnace process and carbon cycle Download PDFInfo
- Publication number
- CN115198043A CN115198043A CN202210665081.1A CN202210665081A CN115198043A CN 115198043 A CN115198043 A CN 115198043A CN 202210665081 A CN202210665081 A CN 202210665081A CN 115198043 A CN115198043 A CN 115198043A
- Authority
- CN
- China
- Prior art keywords
- gas
- steelmaking
- furnace
- blast furnace
- carbon
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/06—Making pig-iron in the blast furnace using top gas in the blast furnace process
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/24—Test rods or other checking devices
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/56—Manufacture of steel by other methods
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C2100/00—Exhaust gas
- C21C2100/04—Recirculation of the exhaust gas
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention relates to a low-carbon smelting system and a low-carbon smelting method based on coupling of a blast furnace-steel making furnace process and carbon circulation, belonging to the technical field of low-carbon smelting. The smelting system comprises a blast furnace, a steel-making furnace, a CO concentration monitoring device, a coal gas collecting and processing device, a heating device and a storage pressurizing device; the steel-making furnace is connected with the blast furnace and is used for receiving the carbon-containing molten iron discharged by the blast furnace to make steel so as to obtain steel-making gas; the CO concentration monitoring device is connected with the steelmaking furnace and is used for detecting the CO concentration in the steelmaking gas in real time; the gas collecting and processing device is connected with the steel making furnace and the blast furnace and is used for collecting and processing the steel making gas with high CO concentration to obtain CO-rich gas and CO-rich gas 2 A gas; the heating device is connected with the steelmaking furnace and is used for collecting low-CO-concentration steelmaking gas and burning the low-CO-concentration steelmaking gas to obtain heat, and the heat is used for heating CO-rich gas sprayed back to the blast furnace(ii) a The storage pressurizing device is connected with the coal gas collecting and processing device and the steel making furnace and is used for enriching CO 2 Collecting the gas and spraying the gas to a steel making furnace. The beneficial effects are that: the steel-making gas is fully utilized.
Description
Technical Field
The invention relates to the technical field of low-carbon smelting, in particular to a low-carbon smelting system and a low-carbon smelting method based on coupling of a blast furnace and a steelmaking furnace flow with carbon circulation.
Background
The development of green and low carbon smelting is the main melody of the development of the iron and steel industry in the world, the iron making process is the main carbon emission process of the iron and steel industry, the carbon emission accounts for 85% of the whole process of the iron and steel, and the iron and steel industry in the world is still based on the production process flow of a blast furnace and a steelmaking furnace for a long time in the future, so that the breakthrough of the green and low carbon smelting technology is realized, and the low carbon development of the iron and steel industry is supported.
But the utilization rate of secondary energy in the steel industry is lower at present, in particular to steelmaking gas generated by a steelmaking furnace. Because of the limitation of the process characteristics of the steel furnace, the concentration of CO in the steelmaking gas in the middle stage of converting is high, and the concentration of CO in the steelmaking gas in the early stage and the later stage of converting is low, while steel enterprises generally only recover the steelmaking gas with high CO concentration in the middle stage of converting, and the steelmaking gas with low CO concentration in the early stage and the later stage of converting is not fully utilized, so that the waste of resources and energy is caused.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a low-carbon smelting system and a low-carbon smelting method based on the coupling of a blast furnace and a steelmaking furnace flow with carbon cycle, which are used for solving the problems of low utilization efficiency of steelmaking gas and poor energy-saving and emission-reducing effects in the prior art.
In order to achieve the above and other related objects, the present invention provides a low carbon smelting system based on a blast furnace-steelmaking furnace process coupled carbon cycle, comprising:
in the case of a blast furnace, the furnace,
the steelmaking furnace is connected with the blast furnace and is used for receiving the carbon-containing molten iron discharged by the blast furnace to perform steelmaking so as to obtain molten steel and steelmaking gas;
the CO concentration monitoring device is connected with the steelmaking furnace and is used for detecting the CO concentration in the steelmaking gas in real time;
a gas collecting and processing device which is connected with the steel making furnace and the blast furnace and is used for collecting and processing the steel making gas with the CO concentration more than or equal to 40 percent to obtain CO-rich gas and CO-rich gas 2 A gas;
the heating device is connected with the steelmaking furnace and used for collecting steelmaking gas with the CO concentration less than 40% and burning the steelmaking gas to obtain heat, and the heat is used for heating the CO-rich gas sprayed back to the blast furnace;
a storage pressurizing device connected with the coal gas collecting and processing device and the steelmaking furnace and used for leading the rich CO 2 And collecting and spraying the gas back to the steel furnace.
Optionally, the steel making furnace is connected with the heating device and the gas collecting and processing device through a first pipeline and a second pipeline respectively, the first pipeline and the second pipeline are respectively provided with a first control valve and a second control valve, and the first control valve and the second control valve are respectively opened or closed according to the CO concentration of the steel making gas fed back by the CO concentration monitoring device.
Optionally, the gas collecting and processing device comprises a gas collecting system, a gas deoxidizing system, a gas pressurizing system, a gas dehydrating system and gas CO which are sequentially arranged on the pipeline 2 A removing system, a gas collecting system connected with the steelmaking furnace, and CO in the gas 2 The removing system is respectively connected with the steel making furnace and the heating device through a third pipeline and a fourth pipeline.
Optionally, the third pipeline is provided with CO 2 Storage system of said CO 2 CO is arranged between the storage system and the steelmaking furnace 2 A pressurized system.
Optionally, the low-carbon smelting system with the blast furnace-steel making furnace flow coupled with carbon circulation further comprises a coal powder injection system connected with the blast furnace, the coal powder injection system is used for injecting coal powder into the blast furnace, and the coal powder injection system is connected with the coal gas CO through a fifth pipeline 2 The fifth pipeline is used for conveying part of the CO-rich gas to the pulverized coal injection system to be used as carrier gas for injecting pulverized coal into the blast furnace.
Optionally, the heating device is connected with the blast furnace through a sixth pipeline, and a coal gas injection system for injecting the heated CO-rich gas back to the blast furnace is arranged on the sixth pipeline.
Optionally, a coal gas waste heat recovery device and a coal gas dust removal device are further mounted on a pipeline connecting the CO concentration monitoring device and the steel making furnace.
In order to achieve the above objects and other related objects, the present application also provides a low-carbon smelting method, comprising the steps of:
carrying out iron making in a blast furnace to obtain carbon-containing molten iron;
introducing the carbon-containing molten iron into a steelmaking furnace, and steelmaking in the steelmaking furnace to obtain molten steel and steelmaking gas;
monitoring the CO concentration in the steelmaking gas in real time, and collecting and upgrading the steelmaking gas when the CO concentration in the steelmaking gas is detected to be more than or equal to 40% so as to obtain CO-rich gas 2 Gas and CO-rich gas, the CO will be rich 2 The gas and the CO-rich gas are respectively sprayed into a steel making furnace and a blast furnace; and when the CO concentration in the steelmaking gas is detected to be less than 40%, combusting the steelmaking gas, collecting the heat obtained by combustion, and using the heat to heat the CO-rich gas injected into the blast furnace.
Optionally, the quality improvement treatment of the steelmaking gas with the CO concentration of more than or equal to 40% comprises the following steps:
deoxidizing the steelmaking gas by a gas deoxidizing system until the oxygen content is less than 1ppm so as to obtain the deoxidized steelmaking gas;
pressurizing, namely pressurizing the deoxidized steelmaking gas to 0.70-0.80 Mpa by a gas pressurizing system to obtain the pressurized steelmaking gas;
dehydrating the pressurized steelmaking gas through a gas dehydration system until the dehydration efficiency is more than 95 percent so as to obtain dehydrated steelmaking gas;
decarbonizing by CO gas 2 The removal system carries out CO treatment on the dehydrated steelmaking gas 2 Separate and CO 2 The removal rate is more than or equal to 95 percent to obtain a decarbonized CO-rich gas and CO-rich gas 2 A gas.
Optionally, will be rich in CO 2 The gas and the CO-rich gas are respectively sprayed into the steel furnace and the blast furnace, and the method comprises the following steps:
will be rich in CO 2 Injecting the gas into the steelmaking furnace to enrich the CO 2 Gas storage in CO 2 Storage system by CO 2 Pressurized system for CO enrichment 2 Pressurizing the gas to 1.5-2 Mpa and spraying back to the steel-making furnace, wherein the CO is rich 2 The gas and the carbon-containing molten iron are mixed and reacted, and the CO-rich gas sprayed into the steelmaking furnace 2 The amount of gas is 5-6 Nm 3 The amount of molten steel is/t;
and injecting the CO-rich gas into the blast furnace, wherein the CO-rich gas comprises a first CO-rich gas and a second CO-rich gas used as a coal powder carrier gas, the first CO-rich gas is heated by a heating device and then injected back into the blast furnace through a coal gas injection system, the second CO-rich gas and coal powder are injected into the blast furnace through the coal powder injection system, and the amount of the second CO-rich gas injected into the blast furnace is 2-4 Nm 3 And/t molten iron.
Optionally, the heating device heats the first CO-rich gas to a temperature of greater than or equal to 300 ℃, and the heat for heating the first CO-rich gas by the heating device is provided by burning steelmaking gas with a CO concentration of less than 40%.
As described above, the present invention is based on a blast furnace-steelmaking furnaceThe low-carbon smelting system and method with the process coupled with carbon circulation at least have the following beneficial effects: burning the steelmaking gas with low CO concentration to obtain heat, and using the heat to remove CO from the steelmaking gas with high CO concentration 2 The rich CO gas is heated, so that the steelmaking gas with different CO concentrations is fully utilized, and the carbon in the steelmaking gas is recycled between the blast furnace and the steelmaking furnace, thereby realizing the carbon recycling of the steel smelting system and achieving the purpose of reducing CO 2 And (4) discharging, and improving the utilization efficiency of resources and energy.
Drawings
FIG. 1 is a schematic structural diagram of a first embodiment of a low-carbon smelting system based on a blast furnace-steelmaking furnace process coupled carbon cycle according to the present invention;
FIG. 2 is a schematic structural diagram of a second embodiment of the low-carbon smelting system based on the coupling of the blast furnace and the steelmaking furnace flow with carbon cycle according to the present invention;
FIG. 3 is a schematic flow chart of an embodiment of the low-carbon smelting process of the present invention.
Description of reference numerals
100-blast furnace; 101-tuyere; 200-a steel furnace; 300-CO concentration monitoring device; 400-a gas collecting and processing device; 401-a gas collection system; 402-gas deoxygenation system; 403-gas pressurization system; 404-gas dehydration system; 405-gas CO 2 A removal system; 500-a heating device; 600-storing the pressure device; 601-CO 2 A storage system; 602-CO 2 A pressurized system; 701-a first conduit; 702-a second conduit; 703-a third conduit; 704-a fourth conduit; 705-a fifth conduit; 706-a sixth conduit; 801-a first control valve; 802-a second control valve; 803-a gas waste heat recovery device; 804-a gas dust removal device; 805-a pulverized coal injection system; 806-gas injection system; 807-the CCUS system; 808-blast furnace gas pipe network.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Please refer to fig. 1 to 3. It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated. The structures, proportions, sizes, and other dimensions shown in the drawings and described in the specification are for understanding and reading the present disclosure, and are not intended to limit the scope of the present disclosure, which is defined in the claims, and are not essential to the art, and any structural modifications, changes in proportions, or adjustments in size, which do not affect the efficacy and attainment of the same are intended to fall within the scope of the present disclosure. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
Before describing embodiments of the present invention in detail, the present invention will be described in an application environment. The technology of the invention is mainly applied to the technical field of steel smelting, in particular to a low-carbon smelting technology of coupling carbon cycle in a blast furnace-steelmaking furnace process, and the invention solves the problem of low utilization rate of the traditional steelmaking gas, especially the steelmaking gas with low CO concentration. In the traditional steel smelting process, the recoverable high CO concentration (generally, the CO volume concentration is more than or equal to 40 percent) of the steelmaking gas per ton of steel is 80-120 m 3 However, the carbon-oxygen reaction is weaker in the early stage and the later stage of the converting, the concentration of CO in the gas is lower, and a large amount of low-CO-concentration (generally, the volume concentration of CO is less than 40%) steelmaking gas can be generated, so that the low CO concentration in the early stage and the later stage of the converting is avoided directlyThe steelmaking gas is directly subjected to combustion and diffusion treatment to cause waste of resources and energy, and the utilization rate of the steelmaking gas is fundamentally improved by combusting the steelmaking gas with low CO concentration and using heat for supplying heat for recovering the steelmaking gas with high CO concentration.
The first embodiment is as follows:
referring to fig. 1, in the present exemplary embodiment, the present application provides a low-carbon smelting system based on a coupled carbon cycle of a blast furnace-steel making furnace process, which includes a blast furnace 100, a steel making furnace 200, a CO concentration monitoring device 300, a gas collecting and processing device 400, a heating device 500, and a storage pressurizing device 600. Wherein the steelmaking furnace 200 is connected with the blast furnace 100, and the steelmaking furnace 200 is used for receiving carbon-containing molten iron discharged from the blast furnace 100 for steelmaking so as to obtain molten steel and steelmaking gas; the CO concentration monitoring device 300 is connected with the steelmaking furnace 200 and is used for detecting the CO concentration in the steelmaking gas generated in the steelmaking furnace 200 in real time; the gas collecting and processing device 400 is connected with the steelmaking furnace 200 and the blast furnace 100 and is used for collecting and processing steelmaking gas with the CO concentration of more than or equal to 40 percent to obtain CO-rich gas and CO-rich gas 2 A gas; the heating device 500 is connected with the steelmaking furnace 200 and is used for collecting steelmaking gas with the CO concentration less than 40% and burning the steelmaking gas to obtain heat, the heat is used for heating CO-rich gas injected back to the blast furnace 100, and the CO-rich gas is the CO-rich gas treated by the gas collection and treatment device 400; the storage pressurizing device 600 is respectively connected with the gas collecting and processing device 400 and the steelmaking furnace 200 and is used for enriching CO 2 The gas is collected and sprayed back to the steelmaking furnace 200, the CO is enriched 2 The gas is rich in CO after being treated by the coal gas collecting and treating device 400 2 A gas. The low-carbon smelting system burns the low-CO-concentration steelmaking gas to obtain heat, and the heat is used for recycling and supplying heat for the high-CO-concentration steelmaking gas, so that the low-CO-concentration steelmaking gas is fully recycled, and meanwhile, the high-CO-concentration steelmaking gas is collected and treated and then sprayed into the blast furnace and the steelmaking furnace, so that carbon circulation is realized, a large amount of carbon dioxide generated by directly burning and utilizing the high-CO-concentration steelmaking gas is avoided, the development requirements of green and low carbon are really met, the utilization efficiency of the steelmaking gas is improved, and the emission of the carbon dioxide is reduced.
Optionally, based on blast furnace smeltingThe low-Carbon smelting system with the steel furnace flow coupled with the Carbon circulation further comprises a CCUS (Carbon Capture, utilization and Storage) system 807, and the gas collection and treatment device 400 is connected with the CCUS system. When the coal gas collecting and processing device 400 adopts the wet decarburization process, the coal gas is rich in CO 2 CO in gas 2 The concentration is more than 95 percent, and the residual CO-rich gas discharged from the gas collecting and processing device 400 2 The gas may be directed through the CCUS system for CCUS treatment.
Optionally, the low-carbon smelting system based on the blast furnace-steelmaking furnace flow coupling carbon cycle further comprises a blast furnace gas pipe network 808, and the gas collecting and processing device 400 and the blast furnace 100 are respectively connected with the blast furnace gas pipe network 808. When the gas collecting and processing device 400 adopts the dry decarburization process, the gas is rich in CO 2 Any part of CO gas in the gas can not be directly sent out, and the residual CO-rich gas discharged from the gas collecting and processing device 400 2 The gas can be collected into the blast furnace gas grid 808 for recycling. The blast furnace gas generated in the smelting process of the blast furnace 100 can also be collected into a blast furnace gas pipe network 808 for recycling.
Alternatively, the heating device 500 may be a regenerative heating device, which is capable of combusting the low CO concentration steel making gas and providing the heat resulting from the combustion to the CO-rich gas for heating.
Example two:
referring to fig. 2, in the present exemplary embodiment, the differences from the first exemplary embodiment include that the low carbon smelting system of the blast furnace-steel making furnace process coupled carbon cycle further includes a pulverized coal injection system connected to the blast furnace 100, the pulverized coal injection system 805 is used for injecting pulverized coal into the blast furnace 100, the pulverized coal injection system 805 is connected to a coal gas collection and processing device through a fifth pipeline 705, and the fifth pipeline 705 is used for conveying a part of CO-rich gas to the pulverized coal injection system 805 to be used as a carrier gas for injecting the pulverized coal into the blast furnace. Wherein, the coal powder injection system 805 is connected with the coal gas CO of the coal gas collecting and processing device through a fifth pipeline 705 2 The removal system 405 is connected. One part of the CO-rich gas discharged by the coal gas collecting and processing device is heated by the heating device 500 and then is injected back to the blast furnace 100, and the other part of the CO-rich gas can be used as the carrier gas of the coal powder and passes through the coal powder injection system 805 and the coal powder IAnd the nitrogen is sprayed back into the blast furnace 100 from the tuyere 100 of the blast furnace, so that the nitrogen can be used as a carrier gas of the coal dust instead of the nitrogen, and the CO-rich gas can be fully utilized, thereby realizing the carbon recycling efficiency.
Alternatively, the pulverized coal and the CO-rich gas may be injected into the blast furnace from the tuyere 101 of the blast furnace 100.
Optionally, the steel making furnace 200 is connected to the heating device 500 through a first pipeline 701, the steel making furnace 200 is connected to the gas collection and treatment device through a second pipeline 702, the first pipeline 701 is provided with a first control valve 801, the second pipeline 702 is provided with a second control valve 802, and the first control valve 801 and the second control valve 802 are respectively opened or closed according to the CO concentration of the steelmaking gas fed back by the CO concentration monitoring device 300. Further, when the CO concentration monitoring device detects that the CO concentration of the steelmaking gas is less than 40%, the first control valve 801 is controlled to be opened, the second control valve 802 is controlled to be closed, and the low-CO-concentration steelmaking gas enters the heating device 500 to be combusted to obtain heat; when the CO concentration monitoring device detects that the CO concentration of the steelmaking gas is greater than or equal to 40%, the first control valve 801 is controlled to be closed, the second control valve 802 is controlled to be opened, and the high-CO-concentration steelmaking gas enters the gas collecting and processing device for quality improvement.
Optionally, the gas collecting and processing device comprises a gas collecting system 401, a gas deoxygenation system 402, a gas pressurization system 403, a gas dehydration system 404 and gas CO 2 Removal system 405. Further, a gas collecting system 401, a gas deoxygenation system 402, a gas pressurization system 403, a gas dehydration system 404, and gas CO 2 The removal system 405 is sequentially arranged on the pipeline, so that the high-CO-concentration steelmaking gas is collected by the gas collection system 401, is deoxidized by the gas deoxidization system 402, is pressurized by the gas pressurization system 403, is dehydrated by the gas dehydration system 404 and is subjected to CO gas treatment 2 The decarbonization of the removal system 405; the gas collection system 401 is connected to the steelmaking furnace 200 so as to collect the high-CO-concentration steelmaking gas discharged from the steelmaking furnace; CO in coal gas 2 The removal system 405 is connected to the steelmaking furnace 200 by means of a third pipeline 703, in order to supply the gas CO 2 CO-rich removal system 405 exhaust 2 The gas is back-sprayed into the steelmaking furnace 200; gas CO 2 Removal system 405 passesThe fourth pipe 704 is connected to the heating device 500 to supply CO gas 2 The CO-rich gas discharged by the removal system 405 is sent to the heating device 500 for heating, so that the CO-rich gas can absorb heat generated by combustion of the low-CO-concentration steelmaking gas, additional fuel combustion heat supply is not needed, the low-CO-concentration steelmaking gas is fully utilized, the CO-rich gas sprayed back to the blast furnace is heated and heated, reducing gas components in blast furnace belly gas are improved, development of indirect reduction of the blast furnace is promoted, and consumption of carbonaceous fuel for blast furnace iron making is reduced.
Optionally, CO is disposed on the third pipeline 703 2 Storage System 601, CO 2 CO is arranged between the storage system 601 and the steel making furnace 200 2 Pressurization system 602, gas CO 2 CO-rich removal system 405 exhaust 2 The gas may be in CO 2 Stored in the storage system 601, CO-rich when required for back-injection into the steelmaking furnace 200 2 Passing the gas through CO 2 The pressurized system 602 is pressurized and then back-sprayed into the steelmaking furnace 200. Further, rich in CO 2 The gas may be back-injected into the steelmaking furnace from the top and/or bottom of the steelmaking furnace.
Optionally, a gas waste heat recovery device 803 and a gas dust removal device 804 are further installed on the pipeline connecting the CO concentration monitoring device 300 and the steelmaking furnace 200, the gas waste heat recovery device 803 is used for recovering heat of steelmaking gas discharged from the steelmaking furnace, and the gas dust removal device 804 is used for dedusting the steelmaking gas. Further, the gas waste heat recovery device 803, the gas dust removal device 804 and the CO concentration monitoring device 300 are sequentially arranged, the gas waste heat recovery device 803 is connected with the steelmaking furnace 200, and the steelmaking gas is sequentially subjected to preheating recovery and dust removal and then subjected to CO concentration detection, so that the accuracy of CO concentration detection is improved.
Optionally, the heating device 500 is connected to the blast furnace 100 through a sixth pipeline 706, and a gas injection system 806 for injecting the heated CO-rich gas back to the blast furnace 100 is disposed on the sixth pipeline 706. Further, the heated CO-rich gas may be back-injected into the blast furnace from the tuyere 101 of the blast furnace 100.
Referring to fig. 1-3, in one embodiment, the present application further provides a low-carbon smelting method, which can be implemented by any of the above methodsThe low-carbon smelting system in one embodiment is implemented and comprises the following steps: performing iron making in a blast furnace 100 to obtain carbon-containing molten iron; introducing carbon-containing molten iron into a steelmaking furnace 200, and carrying out steelmaking in the steelmaking furnace 200 to obtain molten steel and steelmaking gas; monitoring the CO concentration in the steelmaking gas in real time, and collecting and upgrading the steelmaking gas when the CO concentration in the steelmaking gas is detected to be more than or equal to 40 percent so as to obtain CO-rich gas 2 Gas and CO-rich gas, will be rich in CO 2 The gas and the CO-rich gas are respectively sprayed into the steel making furnace 200 and the blast furnace 100; when the CO concentration in the steelmaking gas is detected to be less than 40%, the steelmaking gas is combusted, the heat obtained by combustion is collected, and the heat is used for heating the CO-rich gas injected into the blast furnace 100.
Optionally, the quality improvement treatment of the steelmaking gas with the CO concentration of more than or equal to 40% comprises the following steps: deoxidizing, namely deoxidizing the steelmaking gas by using a gas deoxidizing system 402 until the oxygen content is less than 1ppm so as to obtain the deoxidized steelmaking gas; pressurizing, namely pressurizing the deoxidized steelmaking gas to 0.70-0.80 Mpa by a gas pressurizing system 403 to obtain pressurized steelmaking gas; dehydrating the pressurized steelmaking gas by a gas dehydration system 404 until the dehydration efficiency is more than 95 percent to obtain dehydrated steelmaking gas; decarbonizing by CO gas 2 The removal system 405 performs CO on the dehydrated steelmaking gas 2 Separate and CO 2 The removal rate is more than or equal to 95 percent to obtain CO-rich gas and CO-rich gas after decarburization 2 A gas.
Optionally, the upgrading treatment of the steelmaking gas with the CO concentration of more than or equal to 40% further comprises the following steps: the denitrification treatment and the denitrification treatment may be selected as needed, and for example, the denitrification treatment may be performed after the decarburization treatment, and the denitrification may be performed by a denitrification apparatus.
Optionally, will be rich in CO 2 The injection of the gas and the CO-rich gas into the steel furnace 200 and the blast furnace 100, respectively, comprises: will be rich in CO 2 Injecting the gas into the steelmaking furnace 200 to enrich CO 2 Gas storage in CO 2 Storage system 601 by CO 2 Pressurized system 602 for rich CO 2 Pressurizing the gas to 1.5-2 Mpa and back-spraying to steel-smeltingFurnace 200, rich in CO 2 The gas is mixed with carbon-containing molten iron for reaction. Further, CO-rich gas injected into the steel furnace 2 The amount of gas may be 5 to 6Nm 3 The molten steel may be, for example, 5Nm 3 5.5 Nm/t molten steel 3 Pert molten Steel or 6Nm 3 Any value in/t molten steel; further, rich in CO 2 The gas can be injected into the steel furnace by top blowing, bottom blowing or top-bottom combined blowing, by using CO-rich 2 The gas and C in blast furnace molten iron are subjected to chemical reaction, so that CO can be realized while the calorific value of steelmaking gas is improved 2 The carbon is recycled, so that carbon circulation is realized, and carbon emission is reduced.
Optionally, a CO-rich gas is injected into the blast furnace 100. The CO-rich gas comprises a first CO-rich gas and a second CO-rich gas used as a coal powder carrier gas, the first CO-rich gas is heated by the heating device 500 and then is injected back into the blast furnace 100 through the coal gas injection system 806, and the second CO-rich gas and coal powder are injected into the blast furnace 100 through the coal powder injection system 805. Further, the amount of the second CO-rich gas injected into the blast furnace 100 may be 2 to 4Nm 3 The molten iron/t may be, for example, 2Nm 3 3 Nm/t molten iron 3 Pert molten iron or 4Nm 3 Any value in/t molten iron.
Optionally, the heating device 500 heats the first CO-rich gas to a temperature greater than or equal to 300 ℃, and the heat for heating the first CO-rich gas by the heating device 500 is provided by burning steelmaking gas with a CO concentration less than 40%.
The low-carbon smelting method based on the blast furnace-steelmaking furnace flow coupling carbon cycle improves the utilization efficiency of the energy and carbon of the steel flow, realizes the coupling carbon cycle of a steel system, fully utilizes the steelmaking gas, high-CO-concentration steelmaking gas is subjected to decarburization, heating and other treatment and then is sprayed back to the blast furnace, low-CO-concentration steelmaking gas is subjected to heating of CO-rich gas obtained after the high-CO-concentration steelmaking gas is subjected to decarburization treatment through a regenerative heating device, the reducing gas components in blast furnace belly gas are improved, the development of blast furnace indirect reduction is promoted, the consumption of carbon fuel for blast furnace ironmaking is reduced, and simultaneously the removed CO-rich gas is removed 2 The gas is sprayed back into the steelmaking furnace to replace partial Ar and react with C in the blast furnace molten iron at the same time, so that the method can effectivelyGround reduction of CO in steel systems 2 Discharging and improving the energy utilization efficiency of the steel system.
The lower surface is 1 seat 2000m 3 The invention is further explained by taking a blast furnace and a 120t steel-making furnace as examples, wherein the steel-making furnace comprises a steel-making converter and a steel-making electric furnace.
Tables 1 to 4 show the blast furnace raw fuel conditions and the conventional blast furnace ironmaking process parameters respectively.
TABLE 1 blast furnace Ore charging grade
| FeO | Fe 2 O 3 | TFe | Others |
| 5.5％ | 77.28％ | 58.38％ | 17.21％ |
TABLE 2 blast furnace injection pulverized coal composition
TABLE 3 average composition of steelmaking gas
TABLE 4 Main technical indexes of conventional blast furnace
| Parameter(s) | Conventional blast furnace |
| Coke ratio, kg/thm | 355 |
| Coal ratio, kg/thm | 160 |
| Fuel ratio, kg/thm | 515 |
| Gas reducing ratio of furnace chamber gas | 46％ |
| Wind-warm syndrome | 1250 |
| Wind pressure, mpa | 0.5 |
| Oxygen enrichment rate of blast | 5％ |
| Theoretical combustion temperature,. Deg.C | 2026 |
Referring to fig. 2, the low-carbon smelting system based on the coupled carbon cycle of the blast furnace-steel making furnace process provided by the embodiment includes, but is not limited to, a steel making furnace 200,Gas waste heat recovery device 803, gas dust removal device 804 and CO 2 Pressurization system 602, CO concentration monitoring device 300, first control valve 801, second control valve 802, gas collection system 401, CO 2 A storage system 601, a gas deoxygenation system 402, a gas pressurization system 403, a gas dehydration system 404, a heating device 500, and gas CO 2 A removal system 405, a coal powder injection system 805, a coal gas injection system 806, a blast furnace 100, a blast furnace gas pipe network 808 and a CCUS system. Wherein the blast furnace 100, the blast furnace gas pipe network 808 and the steel furnace 200 are consistent with the conventional blast furnace-steel furnace system. The conventional blast furnace will now be described in detail with reference to tables 1 to 3.
The high-temperature molten iron containing C produced by the blast furnace 100 is transported to a steel-making furnace 200, and the steel-making furnace 200 is utilized to carry out conventional operations such as decarburization, dephosphorization, desulfurization, deoxidation and the like, so as to obtain qualified molten steel. The steel-making furnace 200 is a periodic steel-making device, the general smelting period is 25-45 min, and oxygen blowing and decarburization operation is required. Therefore, in the continuous oxygen blowing process of the steel furnace 200, oxygen chemically reacts with C in the molten iron to generate CO gas. And because of different converting periods, the steelmaking gas with different CO concentrations can be generated, the heat values of the steelmaking gas with different CO concentrations are different, the heat value of the steelmaking gas with lower CO concentration is lower, and the heat value of the steelmaking gas with higher CO concentration is higher. The 1400 ℃ high-temperature steelmaking gas from the steelmaking furnace 200 is subjected to waste heat recovery and dust removal through the gas waste heat recovery device 803 and the gas dust removal device 804, the CO concentration in the steelmaking gas is detected in real time by using the CO concentration monitoring device 300, when the CO concentration in the steelmaking gas is less than 40%, the first control valve 801 is opened, the second control valve 802 is closed, and the low-heat value steelmaking gas is about 15000Nm 3 H (calorific value of about 3300 kJ/m) 3 ) Entering a heat accumulating type heating device for combustion and heat accumulation; when the concentration of CO in the steelmaking gas is more than or equal to 40%, the first control valve 801 is closed, the second control valve 802 is opened, and the high-calorific-value steelmaking gas enters the gas collection system 401 to be stored for the use of the downstream process. According to the difference of the CO concentration of the steelmaking gas, the steelmaking gas is recycled differently, so that the steelmaking gas is completely utilized, the diffusion of the low-heat value gas is effectively avoided, and the utilization efficiency of the steelmaking gas is improved。
The gas amount of the steelmaking coal gas with the CO content of more than or equal to 40 percent, which is led out from the gas collection system 401, is about 77000Nm 3 The specific steelmaking gas composition is shown in Table 3, wherein CO:44.2% CO 2 ：27.7％，H 2 ：1.5％，N 2 :28.6 percent. The drawn steelmaking gas contains a certain amount of oxygen, the normal range is 0-0.4%, considering the safety risk of subsequent steelmaking gas treatment, the steelmaking gas deoxidation treatment is carried out by using the gas deoxidation system 402, and the oxygen content after the treatment is less than 1ppm. The deoxidized steelmaking gas is pressurized to 0.70Mpa to 0.80Mpa through a gas pressurization system 403, so that the back end rich CO gas can be normally injected into the blast furnace 100 with pressure. The pressurized steelmaking gas is dehydrated by a gas dehydration system 404, the dehydration efficiency is required to be more than 95 percent, the water content entering the blast furnace is ensured to be as low as possible, and the fuel consumption of the blast furnace is prevented from being influenced. The dehydrated steelmaking gas enters the gas CO 2 CO removal in removal System 405 2 Removal of CO from gas 2 The removal system 405 may use a dry or wet process to remove CO 2 The amount of the CO-rich gas is about 54000Nm 3 H, CO enrichment of the produced 2 The gas amount is about 23000Nm 3 /h，CO 2 The concentration is more than 95 percent, and the coal gas components are shown in a table 5.
TABLE 5 CO removal 2 Post steelmaking gas composition
| Composition (I) | CO | CO 2 | H 2 | N 2 |
| The CO-rich gas V% | 60.3 | 1 | 2.1 | 36.6 |
| Rich in CO 2 Gas V% | 2 | 98 | 0 | 0 |
Passing gas CO 2 CO-rich gas generated after treatment by the removal system 405 2 Gas, CO 2 Concentration > 95% and flow rate about 23000Nm 3 H, partial enrichment of CO 2 Gas passing through CO 2 Storage system 601 and CO 2 The pressurized system 602 is sprayed back into the steelmaking furnace 200 for top-blowing or bottom-blowing or top-bottom combined blowing with CO enrichment 2 Gas replacing conventional Ar and N 2 Enters the steel making furnace and chemically reacts with C in the carbon-containing molten iron in the steel making furnace, improves the calorific value of the steel making gas generated by the steel making furnace, and realizes CO 2 The part of (2) is recycled. Recycled CO-rich 2 The dosage is 6Nm 3 Calculating the/t, calculating the smelting period of a 120-ton steel furnace for 30min, and recycling CO 2 In an amount of 1440Nm 3 Per, the steelmaking system can reduce CO 2 12kg/t of the effluent was discharged. The components of the upgraded steelmaking gas are shown in Table 6.
TABLE 6 blowing CO into steelmaking furnaces 2 Front and rear gas changes
To ensure CO 2 Can be sprayed into the steel-making furnace from the bottom of the steel-making furnace and passes through CO 2 The pressurized system 602 will be rich in CO 2 Gas pressurization to 1.5Mpa to 2Mpa. Most of the rest is rich in CO 2 Gas, about 21560Nm 3 The/h enters a blast furnace gas pipe network 808 or is subjected to CCUS treatment through a CCUS system 807.
CO removal 2 Last 54000Nm 3 The CO-rich gas is heated to more than 300 ℃ through a heat accumulating type heating device to supplement heat for the CO-rich gas to be sprayed back into the blast furnace 100, and the heat required by the heat accumulating type heating device is provided by steelmaking gas with the CO concentration less than 40%. Low heat value steel-making gas with CO concentration less than 40% about 15000Nm 3 H (calorific value of about 3300 kJ/m) 3 ) The temperature after being heated by the heat accumulating type heating device can reach 436 ℃ according to the calculation of the heat efficiency of 0.8.
The pressurized and heated CO-rich gas is injected into the blast furnace 100 from the tuyere 101 of the blast furnace through the gas injection system 806. Simultaneous CO removal 2 The later rich CO can also replace N 2 The carrier gas is injected into the blast furnace 100 through the tuyere 101 of the blast furnace along with the powder injection, and the CO-rich amount as the carrier gas of the coal powder is 2-4 Nm 3 And/t molten iron. Deoxidizing, pressurizing, dewatering and removing CO from steel-smelting gas 2 The CO-rich gas obtained after heating is injected into the blast furnace 100 from the tuyere 101 of the blast furnace through the gas injection system 806, the proportion of the reducing gas in the furnace belly gas in the blast furnace can be greatly improved, and the furnace belly gas components are shown in Table 7, so that the indirect reduction of the blast furnace is promoted, the direct reduction is reduced, the ton iron fuel consumption of the blast furnace is reduced, and the CO fuel consumption of the blast furnace iron-making system is reduced 2 And (5) discharging.
TABLE 7 hearth gas composition
| Composition (I) | CO | H 2 | N 2 |
| Content (wt.) | 42.4％ | 8.6％ | 49％ |
Through the calculation of the heat balance and the material balance of the blast furnace, the steelmaking gas after decarburization, denitrification and heating is sprayed back to the blast furnace, the fuel ratio is 433kg/t, wherein the coal ratio is 180kg/t, and the coke ratio is 253kg/t. Compared with the conventional blast furnace-steelmaking furnace flow, the method has the advantages that the carbon-containing fuel is obviously reduced, the fuel ratio is reduced by 82kg/t, the direct carbon reduction ratio is about 16 percent, and the CO is reduced by iron per ton 2 About 256kg/t of emission, and CO for back spraying of ton steel 2 12kg/t, converted into ton iron, and the CO can be reduced in a blast furnace-steelmaking furnace flow 2 The emission is about 270kg/t, the carbon reduction effect is obvious, and the specific indexes are shown in Table 8.
TABLE 8 Main technical indexes
| Parameter(s) | Conventional blast furnace-steelmaking furnace process | Coupled carbon cycle low carbon process |
| Coke ratio, kg/thm | 355 | 253 |
| Coal ratio, kg/thm | 160 | 180 |
| Fuel ratio, kg/thm | 515 | 433 |
| Gas reducing ratio of furnace chamber gas | 46％ | 51％ |
| Direct reduction of carbon by proportion | - | 16％ |
| CO 2 Emission reduction of kg/t molten iron | - | 256 |
| Steel-making back-spraying CO 2 kg/t steel | - | 12 |
| CO reduction in blast furnace-steelmaking furnace process 2 kg/t | - | 270 |
After the blast furnace carbon-containing molten iron produced by the blast furnace is smelted by the steelmaking furnace, the produced molten steel is used for the subsequent process, and the produced by-product steelmaking coal gas is completely utilized and recycled after passing through the heating device 500 and the coal gas collecting system 401. The steelmaking gas is recycled, so that the low-carbon smelting of the coupling carbon cycle of the blast furnace-steelmaking furnace process can be realized, and the reduction of CO is realized 2 The purposes of emission and improving the utilization efficiency of energy sources.
In the description of the present specification, reference to the description of the terms "present embodiment," "example," "specific example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Those skilled in the art can modify or change the above-described embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (11)
1. A low-carbon smelting system based on coupling of a blast furnace and a steelmaking furnace flow with carbon circulation is characterized by comprising:
a blast furnace,
the steelmaking furnace is connected with the blast furnace and is used for receiving the carbon-containing molten iron discharged by the blast furnace to perform steelmaking so as to obtain molten steel and steelmaking gas;
the CO concentration monitoring device is connected with the steelmaking furnace and is used for detecting the CO concentration in the steelmaking gas in real time;
a gas collecting and processing device which is connected with the steel making furnace and the blast furnace and is used for collecting and processing the steel making gas with the CO concentration more than or equal to 40 percent to obtain CO-rich gas and CO-rich gas 2 A gas;
the heating device is connected with the steelmaking furnace and is used for collecting steelmaking gas with the CO concentration of less than 40% and burning the steelmaking gas to obtain heat, and the heat is used for heating the CO-rich gas sprayed back to the blast furnace;
a storage pressurizing device connected with the coal gas collecting and processing device and the steelmaking furnace and used for leading the rich CO 2 And collecting and spraying the gas back to the steel furnace.
2. The low-carbon smelting system based on the blast furnace-steelmaking furnace flow coupling carbon cycle of claim 1, wherein: the steel making furnace is respectively connected with the heating device and the coal gas collecting and processing device through a first pipeline and a second pipeline, a first control valve and a second control valve are respectively installed on the first pipeline and the second pipeline, and the first control valve and the second control valve are respectively opened or closed according to the CO concentration of the steel making coal gas fed back by the CO concentration monitoring device.
3. The low-carbon smelting system based on the blast furnace-steelmaking furnace flow coupling carbon cycle of claim 1, wherein: the gas collecting and processing device comprises a gas collecting system, a gas deoxidizing system, a gas pressurizing system, a gas dehydrating system and gas CO which are sequentially arranged on a pipeline 2 A removing system, a gas collecting system connected with the steelmaking furnace, and CO in the gas 2 The removing system is respectively connected with the steel-making furnace and the heating device through a third pipeline and a fourth pipeline.
4. The low-carbon smelting system based on the blast furnace-steelmaking furnace flow coupling carbon cycle of claim 3, wherein: CO is arranged on the third pipeline 2 Storage system of said CO 2 CO is arranged between the storage system and the steelmaking furnace 2 A pressurized system.
5. The low-carbon smelting system based on the blast furnace-steelmaking furnace flow coupling carbon cycle of claim 3, wherein: the low-carbon smelting system with the blast furnace-steel making furnace flow coupled with the carbon circulation also comprises a coal powder injection system connected with the blast furnace, wherein the coal powder injection system is used for injecting coal powder into the blast furnace, and the coal powder injection system is connected with the coal gas CO through a fifth pipeline 2 The fifth pipeline is used for conveying part of the CO-rich gas to the pulverized coal injection system to be used as carrier gas for injecting pulverized coal into the blast furnace.
6. The low-carbon smelting system based on the blast furnace-steelmaking furnace flow coupling carbon cycle of claim 1, wherein: the heating device is connected with the blast furnace through a sixth pipeline, and a coal gas injection system for injecting the heated CO-rich gas back to the blast furnace is arranged on the sixth pipeline.
7. The low-carbon smelting system based on the blast furnace-steelmaking furnace flow coupling carbon cycle of claim 1, wherein: and a coal gas waste heat recovery device and a coal gas dust removal device are also arranged on a pipeline connecting the CO concentration monitoring device and the steel making furnace.
8. A low-carbon smelting method is characterized by comprising the following steps:
carrying out iron making in a blast furnace to obtain carbon-containing molten iron;
introducing the carbon-containing molten iron into a steelmaking furnace, and steelmaking in the steelmaking furnace to obtain molten steel and steelmaking gas;
monitoring the CO concentration in the steelmaking gas in real time, and collecting and upgrading the steelmaking gas when the CO concentration in the steelmaking gas is detected to be more than or equal to 40% so as to obtain CO-rich gas 2 Gas and CO-rich gas, will be rich in CO 2 The gas and the CO-rich gas are respectively sprayed into a steel making furnace and a blast furnace; and when the CO concentration in the steelmaking gas is detected to be less than 40%, combusting the steelmaking gas, collecting the heat obtained by combustion, and using the heat to heat the CO-rich gas injected into the blast furnace.
9. The low-carbon smelting method of claim 8, wherein the upgrading of the steelmaking gas with the CO concentration greater than or equal to 40% comprises:
deoxidizing the steelmaking gas by a gas deoxidizing system until the oxygen content is less than 1ppm so as to obtain the deoxidized steelmaking gas;
pressurizing, namely pressurizing the deoxidized steelmaking gas to 0.70-0.80 Mpa by a gas pressurizing system to obtain the pressurized steelmaking gas;
dehydrating the pressurized steelmaking gas by a gas dehydration system until the dehydration efficiency is more than 95 percent to obtain dehydrated steelmaking gas;
decarbonizing by CO gas 2 The removal system carries out CO treatment on the dehydrated steelmaking gas 2 Separate and CO 2 The removal rate is more than or equal to 95 percent to obtain CO-rich gas and CO-rich gas after decarburization 2 A gas.
10. The low carbon smelting process of claim 8, wherein the rich CO is added 2 The gas and the CO-rich gas are respectively sprayed into the steel furnace and the blast furnace, and the method comprises the following steps:
will be rich in CO 2 Injecting the gas into the steelmaking furnace to enrich the CO 2 Gas storage in CO 2 Storage system by CO 2 Pressurized system for CO enrichment 2 Pressurizing the gas to 1.5-2 Mpa and spraying back to the steel-making furnace, wherein the CO is rich 2 The gas and the carbon-containing molten iron are mixed and reacted, and the CO-rich gas sprayed into the steelmaking furnace 2 The amount of gas is 5-6 Nm 3 The amount of molten steel is/t;
and injecting the CO-rich gas into the blast furnace, wherein the CO-rich gas comprises a first CO-rich gas and a second CO-rich gas used as a coal powder carrier gas, the first CO-rich gas is heated by a heating device and then injected back into the blast furnace through a coal gas injection system, the second CO-rich gas and coal powder are injected into the blast furnace through the coal powder injection system, and the amount of the second CO-rich gas injected into the blast furnace is 2-4 Nm 3 And/t molten iron.
11. The low-carbon smelting method according to claim 10, characterized by comprising the following steps: the heating device heats the first CO-rich gas to a temperature of more than or equal to 300 ℃, and the heat for heating the first CO-rich gas by the heating device is provided by burning steelmaking gas with CO concentration of less than 40%.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210665081.1A CN115198043A (en) | 2022-06-13 | 2022-06-13 | Low-carbon smelting system and method based on coupling of blast furnace-steel furnace process and carbon cycle |
| PCT/CN2022/108135 WO2023240753A1 (en) | 2022-06-13 | 2022-07-27 | Low-carbon smelting system and method based on blast furnace-steelmaking furnace process coupled carbon cycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210665081.1A CN115198043A (en) | 2022-06-13 | 2022-06-13 | Low-carbon smelting system and method based on coupling of blast furnace-steel furnace process and carbon cycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115198043A true CN115198043A (en) | 2022-10-18 |
Family
ID=83575951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210665081.1A Pending CN115198043A (en) | 2022-06-13 | 2022-06-13 | Low-carbon smelting system and method based on coupling of blast furnace-steel furnace process and carbon cycle |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115198043A (en) |
| WO (1) | WO2023240753A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115807143A (en) * | 2022-12-20 | 2023-03-17 | 中冶赛迪工程技术股份有限公司 | Blast furnace gas dynamic regulation and control method and system |
| CN115874002A (en) * | 2022-10-30 | 2023-03-31 | 新疆八一钢铁股份有限公司 | Hydrogen-carbon-rich circulating oxygen blast furnace gas recovery technology and control method |
| WO2023240753A1 (en) * | 2022-06-13 | 2023-12-21 | 中冶赛迪工程技术股份有限公司 | Low-carbon smelting system and method based on blast furnace-steelmaking furnace process coupled carbon cycle |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1043344A (en) * | 1987-11-30 | 1990-06-27 | 日本钢管株式会社 | The reduction of molten iron ore method and apparatus |
| CN101818227A (en) * | 2010-05-05 | 2010-09-01 | 北京科技大学 | Method for recycling CO2 separated from converter steel-making gas for top blowing and bottom blowing |
| US20200149124A1 (en) * | 2017-07-03 | 2020-05-14 | L'Air Liquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude | Method for operating an iron- or steelmaking- plant |
| CN113621745A (en) * | 2021-08-19 | 2021-11-09 | 中冶赛迪工程技术股份有限公司 | Blast furnace-converter steel production method based on carbon cycle |
| CN113718074A (en) * | 2021-09-03 | 2021-11-30 | 中冶赛迪工程技术股份有限公司 | Low-carbon blast furnace iron-making method |
| CN114395648A (en) * | 2022-01-30 | 2022-04-26 | 新疆八一钢铁股份有限公司 | Iron-making method of hydrogen-carbon-rich circulating blast furnace |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20140002248A (en) * | 2012-06-28 | 2014-01-08 | 현대제철 주식회사 | Apparatus and method for recovering by-product gas in furnace |
| CN109837358B (en) * | 2019-03-26 | 2020-04-14 | 东北大学 | Steelmaking flue gas self-circulation composite converting system and method |
| CN109945665A (en) * | 2019-03-28 | 2019-06-28 | 中国科学院力学研究所 | A kind of low CO concentration smoke catalytic burning and regeneration sensible heat recovery method and system |
| CN215924990U (en) * | 2021-08-19 | 2022-03-01 | 中冶赛迪工程技术股份有限公司 | Blast furnace-converter steel production system based on carbon cycle |
| CN115198043A (en) * | 2022-06-13 | 2022-10-18 | 中冶赛迪工程技术股份有限公司 | Low-carbon smelting system and method based on coupling of blast furnace-steel furnace process and carbon cycle |
-
2022
- 2022-06-13 CN CN202210665081.1A patent/CN115198043A/en active Pending
- 2022-07-27 WO PCT/CN2022/108135 patent/WO2023240753A1/en unknown
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1043344A (en) * | 1987-11-30 | 1990-06-27 | 日本钢管株式会社 | The reduction of molten iron ore method and apparatus |
| CN101818227A (en) * | 2010-05-05 | 2010-09-01 | 北京科技大学 | Method for recycling CO2 separated from converter steel-making gas for top blowing and bottom blowing |
| US20200149124A1 (en) * | 2017-07-03 | 2020-05-14 | L'Air Liquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude | Method for operating an iron- or steelmaking- plant |
| CN113621745A (en) * | 2021-08-19 | 2021-11-09 | 中冶赛迪工程技术股份有限公司 | Blast furnace-converter steel production method based on carbon cycle |
| CN113718074A (en) * | 2021-09-03 | 2021-11-30 | 中冶赛迪工程技术股份有限公司 | Low-carbon blast furnace iron-making method |
| CN114395648A (en) * | 2022-01-30 | 2022-04-26 | 新疆八一钢铁股份有限公司 | Iron-making method of hydrogen-carbon-rich circulating blast furnace |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023240753A1 (en) * | 2022-06-13 | 2023-12-21 | 中冶赛迪工程技术股份有限公司 | Low-carbon smelting system and method based on blast furnace-steelmaking furnace process coupled carbon cycle |
| CN115874002A (en) * | 2022-10-30 | 2023-03-31 | 新疆八一钢铁股份有限公司 | Hydrogen-carbon-rich circulating oxygen blast furnace gas recovery technology and control method |
| CN115807143A (en) * | 2022-12-20 | 2023-03-17 | 中冶赛迪工程技术股份有限公司 | Blast furnace gas dynamic regulation and control method and system |
| CN115807143B (en) * | 2022-12-20 | 2024-06-11 | 中冶赛迪工程技术股份有限公司 | Dynamic regulation and control method and system for blast furnace gas |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023240753A1 (en) | 2023-12-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115198043A (en) | Low-carbon smelting system and method based on coupling of blast furnace-steel furnace process and carbon cycle | |
| RU2770105C2 (en) | Method for operating plant for cast iron or steel production | |
| WO2023019917A1 (en) | Carbon cycle-based blast furnace-converter steel production method | |
| CN111485044B (en) | Pseudo-pure oxygen iron making and blast furnace gas recycling method and device | |
| CN101575653A (en) | Method and device for separating carbon dioxide to improve mass energy of blast furnace gas | |
| WO2011017995A1 (en) | Method for reusing outlet coal gas as reducing gas in direct reduction process | |
| CN115011746B (en) | CO2 circulation-based total oxygen/high oxygen-enriched iron-making gas-making system and operation method | |
| CN105734190A (en) | Oxygen blast furnace and gas-based shaft kiln combination production system and combination production method | |
| CN215924990U (en) | Blast furnace-converter steel production system based on carbon cycle | |
| CN105671228A (en) | Oxygen blast furnace and gas base shaft furnace combined production system and method | |
| CN104567441A (en) | Method for enriching and recovering carbon dioxide in iron mine sintering smoke gas | |
| CN111910036B (en) | Method for co-producing high-quality synthesis gas by reducing vanadium titano-magnetite with biomass | |
| CN111850216B (en) | Method for co-producing synthesis gas by reducing vanadium-titanium magnetite through biomass | |
| CN108822898B (en) | Coal gas upgrading and recycling process of total-oxygen and total-coal iron-making technology | |
| CN115820954A (en) | Blast furnace blowing CO 2 Biomass charcoal tempering co-production carbon emission reduction system and application process | |
| CN114574642A (en) | Gas making process and equipment for reducing solid fuel for molten iron production in blast furnace | |
| CN112662824A (en) | Blast furnace hydrogen-rich smelting process for efficiently utilizing metallurgical waste gas | |
| CN111850217B (en) | Method for co-producing synthesis gas by reducing vanadium-titanium magnetite through biomass | |
| CN207130289U (en) | A kind of system with COREX devices and direct-reduction shaft furnace production sponge iron | |
| CN116536468B (en) | Production process for directly reducing iron ore | |
| CN115354094B (en) | Efficient ecological metallurgical iron-making method | |
| CN114657317B (en) | Low-carbon metallurgy method | |
| CN105219906A (en) | The combine production method of a kind of blue charcoal and direct-reduced iron | |
| CN115522006A (en) | Gas-based direct reduction iron-making process for accelerating reaction | |
| CN105671229A (en) | Oxygen blast furnace and gas base shaft furnace combined production system and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |