RU2015130288A - METHOD FOR NITROGEN-FREE MELTING OF IRON IN A HOUSE WITH INJECTION OF COLD OXYGEN AND COLD SYNTHESIS-GAS (CO) - Google Patents

METHOD FOR NITROGEN-FREE MELTING OF IRON IN A HOUSE WITH INJECTION OF COLD OXYGEN AND COLD SYNTHESIS-GAS (CO) Download PDF

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Publication number
RU2015130288A
RU2015130288A RU2015130288A RU2015130288A RU2015130288A RU 2015130288 A RU2015130288 A RU 2015130288A RU 2015130288 A RU2015130288 A RU 2015130288A RU 2015130288 A RU2015130288 A RU 2015130288A RU 2015130288 A RU2015130288 A RU 2015130288A
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Russia
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gas
cold
blast furnace
nitrogen
oxygen
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RU2015130288A
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Russian (ru)
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Валерий Иванович Еремин
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Валерий Иванович Еремин
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Priority to RU2015130288A priority Critical patent/RU2015130288A/en
Publication of RU2015130288A publication Critical patent/RU2015130288A/en

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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/10Reduction of greenhouse gas [GHG] emissions
    • Y02P10/122Reduction of greenhouse gas [GHG] emissions by capturing or storing CO2
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/10Reduction of greenhouse gas [GHG] emissions
    • Y02P10/143Reduction of greenhouse gas [GHG] emissions of methane [CH4]
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/25Process efficiency

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  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Claims (5)

1. Способ безазотной плавки чугуна в домне с вдуванием холодного кислорода и холодного синтез-газа (СО) в работающем на кислороде металлургическом реакторе, имеющем зону восстановления, в виде доменной печи или установки восстановительной плавки, включающий отвод из зоны восстановления очищенного сырьевого газа и возвращение его в зону восстановления с добавкой углеводородов, отличающийся тем, что в домну вдувается горячий воздух 1200°С и природный газ 20-25°С, в пусковой час начинается медленное снижение подачи горячего воздуха и природного газа с одновременной подачей холодного кислорода 25°С в объеме 15% от общей подачи каждые 10 минут, снижение подачи горячего дутья и природного газа и увеличение подачи кислорода производится в течение одного часа, колошниковый газ идет через «мокрую» очистку в общий коллектор предприятия, после окончания подачи горячего дутья и природного газа совсем и подачи кислорода на уровне 10000 м3/ч, домна работает на одном холодном кислороде 20-25°С в течение 1 часа, за это время весь азот покинет домну, после чего открывается шибер на газоходе новой схемы и закрывается шибер на подаче колошникового газа в общий коллектор завода, колошниковый газ идет по стеклопластиковым газоходам к установке «Гринсол», газ очищается от пыли, воды и CO2, диоксид углерода CO2 от установки поступает на установку доочистки, ожижения и на склад, а оттуда - потребителям, чистый, «сухой» оксид углерода с небольшим количеством азота 2-3% поступает в компрессор, где поднимается давление газа до 4 бар и газ направляет через фурмы подачи горячего воздуха в домну, где СО сгорает до CO2, повышая температуру до 2100°С горна и экономя кокс 140 кг/т чугуна, где реформируется CO2 в 2СО, который восстанавливает железо, снова окисляясь до CO2, непрореагированное СО и СО, полученное прямым восстановлением железа, вместе с CO2 и доменной пылью, поступает в колошник, оттуда в «мокрую» очистку, существующую на предприятии, и после этого через шибер поступает на установку «Гринсол», цикл повторяется, движение газа по газоходам осуществляется за счет остаточного давления 0,6-07 бар после «мокрой» очистки.1. The method of nitrogen-free cast iron smelting in a blast furnace with injection of cold oxygen and cold synthesis gas (CO) in an oxygen-powered metallurgical reactor having a reduction zone, in the form of a blast furnace or a reduction smelting plant, including the removal of purified raw gas from the recovery zone and return it into the recovery zone with the addition of hydrocarbons, characterized in that hot air of 1200 ° C and natural gas of 20-25 ° C are blown into the blast furnace; at the starting hour, a slow decrease in the supply of hot air and natural gas begins about gas with a simultaneous supply of cold oxygen 25 ° C in the amount of 15% of the total supply every 10 minutes, a decrease in the supply of hot blast and natural gas and an increase in oxygen supply are made within one hour, the blast furnace gas goes through the “wet” purification to the general collector of the enterprise , after the end of the supply of hot blast and natural gas at all and the supply of oxygen at the level of 10,000 m 3 / h, the blast furnace runs on one cold oxygen of 20-25 ° C for 1 hour, during which time all the nitrogen leaves the blast furnace, after which the gate opens flue new sche we close the gate to supply the top gas to the common collector of the plant, the top gas goes through fiberglass ducts to the Greensol plant, the gas is cleaned of dust, water and CO2, carbon dioxide CO2 from the plant goes to the post-treatment, liquefaction and storage facilities, and from there to consumers, clean, “dry” carbon monoxide with a small amount of nitrogen 2-3% enters the compressor, where the gas pressure rises to 4 bar and directs the gas through the tuyeres of supplying hot air to the blast furnace, where CO burns to CO2, raising the temperature to 2100 ° С hearth and ek Nominee coke 140 kg / t of pig iron, where CO2 is reformed to 2CO, which reduces iron, oxidizing again to CO2, unreacted CO and CO obtained by direct reduction of iron, together with CO2 and blast furnace dust, go to the top, and from there to “wet” cleaning existing at the enterprise, and then through the gate enters the Greensol installation, the cycle repeats, the gas moves through the flues due to the residual pressure of 0.6-07 bar after wet cleaning. 2. Способ безазотной плавки чугуна в домне с вдуванием холодного кислорода и холодного синтез-газа (СО) по п. 1, отличающийся тем, что содержание азота в домне не более 3% от общего объема газа.2. The method of nitrogen-free cast iron smelting in a blast furnace with injection of cold oxygen and cold synthesis gas (СО) according to claim 1, characterized in that the nitrogen content in the blast furnace is not more than 3% of the total gas volume. 3. Способ безазотной плавки чугуна в домне с вдуванием холодного кислорода и холодного синтез-газа (СО) по п. 1, отличающийся тем, что включается вентилятор, находящийся в установке «Гринсол».3. The method of nitrogen-free cast iron smelting in a blast furnace with injection of cold oxygen and cold synthesis gas (СО) according to claim 1, characterized in that the fan in the Greensol installation is turned on. 4. Способ безазотной плавки чугуна в домне с вдуванием холодного кислорода и холодного синтез-газа (СО) по п. 1, отличающийся тем, что при увеличении объема азота в схеме до 5%, в установке «Грисол», в адсорбере имеется зона сдувки инертных газов.4. The method of nitrogen-free cast iron smelting in a blast furnace with injection of cold oxygen and cold synthesis gas (СО) according to claim 1, characterized in that, with an increase in the volume of nitrogen in the circuit up to 5%, in the Grisol installation there is a blow-off zone in the adsorber inert gases. 5. Способ безазотной плавки чугуна в домне с вдуванием холодного кислорода и холодного синтез-газа (СО) по п. 1, отличающийся тем, что синтез-газ подается холодным при температуре 150°С без предварительного подогрева.5. The method of nitrogen-free cast iron smelting in a blast furnace with injection of cold oxygen and cold synthesis gas (СО) according to claim 1, characterized in that the synthesis gas is supplied cold at a temperature of 150 ° C without preliminary heating.
RU2015130288A 2015-07-22 2015-07-22 METHOD FOR NITROGEN-FREE MELTING OF IRON IN A HOUSE WITH INJECTION OF COLD OXYGEN AND COLD SYNTHESIS-GAS (CO) RU2015130288A (en)

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RU2015130288A RU2015130288A (en) 2015-07-22 2015-07-22 METHOD FOR NITROGEN-FREE MELTING OF IRON IN A HOUSE WITH INJECTION OF COLD OXYGEN AND COLD SYNTHESIS-GAS (CO)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019150204A1 (en) * 2018-02-01 2019-08-08 МОШКОВ, Владимир Nitrogen-free pig iron smelting technology with oxygen and carbon dioxide blown into a blast furnace

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019150204A1 (en) * 2018-02-01 2019-08-08 МОШКОВ, Владимир Nitrogen-free pig iron smelting technology with oxygen and carbon dioxide blown into a blast furnace

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Effective date: 20170511