CN114134277A - Electric auxiliary heating direct reduction shaft furnace - Google Patents
Electric auxiliary heating direct reduction shaft furnace Download PDFInfo
- Publication number
- CN114134277A CN114134277A CN202111584201.7A CN202111584201A CN114134277A CN 114134277 A CN114134277 A CN 114134277A CN 202111584201 A CN202111584201 A CN 202111584201A CN 114134277 A CN114134277 A CN 114134277A
- Authority
- CN
- China
- Prior art keywords
- shaft furnace
- electric heating
- auxiliary heating
- direct reduction
- electric auxiliary
- 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
- 230000009467 reduction Effects 0.000 title claims abstract description 17
- 238000010438 heat treatment Methods 0.000 title claims abstract description 8
- 238000005485 electric heating Methods 0.000 claims abstract description 20
- HMDDXIMCDZRSNE-UHFFFAOYSA-N [C].[Si] Chemical compound [C].[Si] HMDDXIMCDZRSNE-UHFFFAOYSA-N 0.000 claims description 2
- 230000006698 induction Effects 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000006722 reduction reaction Methods 0.000 description 14
- 229910000831 Steel Inorganic materials 0.000 description 12
- 239000010959 steel Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000011810 insulating material Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000010445 mica Substances 0.000 description 2
- 229910052618 mica group Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/02—Making spongy iron or liquid steel, by direct processes in shaft furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/02—Making spongy iron or liquid steel, by direct processes in shaft furnaces
- C21B13/023—Making spongy iron or liquid steel, by direct processes in shaft furnaces wherein iron or steel is obtained in a molten state
- C21B13/026—Making spongy iron or liquid steel, by direct processes in shaft furnaces wherein iron or steel is obtained in a molten state heated electrically
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/02—Details
Abstract
The invention relates to an electric auxiliary heating direct reduction shaft furnace, which belongs to the field of gas-based direct reduced iron and comprises the following components: the reduction section of the shaft furnace is provided with an electric heating device; the invention can effectively reduce the consumption of reducing gas in the production of direct reduced iron, and has obvious energy-saving and emission-reducing effects.
Description
Technical Field
The invention relates to the field of shaft furnace gas-based direct reduced iron, in particular to a technical scheme of a shaft furnace for reducing the consumption of reducing gas.
Background
The shaft furnace gas-based direct reduced iron technology is a non-blast furnace iron making process, has the advantages of no use of coking coal, low energy consumption, less carbon emission, environmental friendliness and the like, and plays an important role in energy conservation and emission reduction and improvement of the quality of steel products.
In the prior art, in other methods such as the HYL method and the Midrex method, reducing gas such as methane or coke oven gas is heated to a certain temperature and then is introduced into a shaft furnace, ores in the shaft furnace are heated to the temperature required by the reaction by the hot reducing gas for reaction, and heat required for maintaining the reaction is provided for a reaction system. This allows the amount of reducing gas used to heat the ore to carry heat to be much greater than the amount of reducing gas that participates in the reduction reaction; although various top gas recovery devices are arranged in various existing processes, the top gas cannot be completely recovered, and the utilization rate of the top gas is only about 38% at present, so that the cost is increased, the emission of reducing gas is increased, and the potential safety hazard is increased.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an electric auxiliary heating direct reduction shaft furnace.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the invention provides an electric auxiliary heating direct reduction shaft furnace, which comprises: an electric heating device is arranged on the reduction section of the shaft furnace.
Further, the method also comprises the following steps: the electric heating device can be a resistance type, a silicon-carbon rod type, an induction heating type and other devices for converting electric energy into heat energy.
The beneficial effects of the invention at least comprise:
the invention uses the electric heating device to provide the heat required by the reduction reaction in the shaft furnace, and omits the part of reducing gas used for carrying the heat, thereby greatly reducing the consumption of the reducing gas in the direct reduction iron process of the shaft furnace, and reducing the cost and the emission.
Drawings
FIG. 1 is a schematic structural diagram of the present invention
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to specific examples. The following examples are illustrative only and are not to be construed as limiting the invention. The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications.
Example 1: a plurality of steel pipes which are penetrated with electric heating wires or electric heating belts are transversely arranged on the reduction section part in the shaft furnace and are tightly attached to the furnace wall, wherein the electric heating wires or the electric heating belts are separated from the steel pipes by high-temperature resistant insulating materials (such as mica plates and the like), the steel pipes are separated by a certain distance, and the temperature of the reduction section can be increased after the steel pipes are electrified.
Example 2: a plurality of steel pipes which are penetrated with electric heating wires or electric heating belts are arranged on the part of the reduction section in the shaft furnace, which is tightly attached to the furnace wall in the longitudinal direction, wherein the electric heating wires or the electric heating belts are separated from the steel pipes by high-temperature resistant insulating materials (such as mica sheets) and the steel pipes are separated by a certain distance, and the temperature of the reduction section can be raised after the steel pipes are electrified.
Example 3: a circle of steel plate is arranged on the reduction section part in the shaft furnace and clings to the furnace wall, an electric heating wire or an electric heating belt is arranged between the steel plate and the furnace wall, the electric heating wire or the electric heating belt is separated from the steel plate by a high-temperature resistant insulating material, and the temperature of the reduction section can be increased after the electric heating wire or the electric heating belt is electrified.
Although embodiments of the present invention have been shown and described, it is understood that the embodiments are illustrative and not restrictive, that various changes, modifications, substitutions and alterations may be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (2)
1. An electrically-assisted heating direct reduction shaft furnace, characterized in that: an electric heating device is arranged at the reduction section of the shaft furnace.
2. According to claim 1, the electric heating device can be a resistance type, a silicon carbon rod type, an induction heating type or other devices for converting electric energy into heat energy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111584201.7A CN114134277A (en) | 2021-12-22 | 2021-12-22 | Electric auxiliary heating direct reduction shaft furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111584201.7A CN114134277A (en) | 2021-12-22 | 2021-12-22 | Electric auxiliary heating direct reduction shaft furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114134277A true CN114134277A (en) | 2022-03-04 |
Family
ID=80383086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111584201.7A Pending CN114134277A (en) | 2021-12-22 | 2021-12-22 | Electric auxiliary heating direct reduction shaft furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114134277A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114959152A (en) * | 2022-05-18 | 2022-08-30 | 四川辉伟融达科技有限责任公司 | Method for producing reduced iron by two-section type electric heating and shaft furnace device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB269959A (en) * | 1926-01-19 | 1927-04-19 | Yoshimichi Murakami | Improvements in shaft furnaces for reducing iron ores |
| CH619736A5 (en) * | 1976-01-27 | 1980-10-15 | Max Geisseler | Process and equipment for producing metal sponge in a shaft furnace by means of hydrogen-rich reducing gases |
| CN203904382U (en) * | 2014-05-29 | 2014-10-29 | 北京神雾环境能源科技集团股份有限公司 | Gas-based shaft furnace |
| CN107686869A (en) * | 2017-09-29 | 2018-02-13 | 江苏省冶金设计院有限公司 | A kind of pneumoelectric mixed type gas-based shaft kiln reduces system and method |
| CN107723401A (en) * | 2017-09-06 | 2018-02-23 | 江苏省冶金设计院有限公司 | Handle the system and method containing Iron Ore Powder |
| CN112899427A (en) * | 2021-01-15 | 2021-06-04 | 东北大学 | Hydrogen shaft furnace iron making system and method using electric energy for heating |
-
2021
- 2021-12-22 CN CN202111584201.7A patent/CN114134277A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB269959A (en) * | 1926-01-19 | 1927-04-19 | Yoshimichi Murakami | Improvements in shaft furnaces for reducing iron ores |
| CH619736A5 (en) * | 1976-01-27 | 1980-10-15 | Max Geisseler | Process and equipment for producing metal sponge in a shaft furnace by means of hydrogen-rich reducing gases |
| CN203904382U (en) * | 2014-05-29 | 2014-10-29 | 北京神雾环境能源科技集团股份有限公司 | Gas-based shaft furnace |
| CN107723401A (en) * | 2017-09-06 | 2018-02-23 | 江苏省冶金设计院有限公司 | Handle the system and method containing Iron Ore Powder |
| CN107686869A (en) * | 2017-09-29 | 2018-02-13 | 江苏省冶金设计院有限公司 | A kind of pneumoelectric mixed type gas-based shaft kiln reduces system and method |
| CN112899427A (en) * | 2021-01-15 | 2021-06-04 | 东北大学 | Hydrogen shaft furnace iron making system and method using electric energy for heating |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114959152A (en) * | 2022-05-18 | 2022-08-30 | 四川辉伟融达科技有限责任公司 | Method for producing reduced iron by two-section type electric heating and shaft furnace device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102492843A (en) | Production method through combined treatment of laterite by direct current electric furnace | |
| KR20150053809A (en) | Method for heating process gases for direct reduction systems | |
| AU2013383015A1 (en) | Process and plant for producing titanium slag from ilmenite | |
| CN114134277A (en) | Electric auxiliary heating direct reduction shaft furnace | |
| CN103496702A (en) | Production device for coproduction of calcium carbide by electrothermal method and oxygen thermal method | |
| CN102605147A (en) | Method for carrying out normalizing heat treatment by using waste heat from forging of forged piece | |
| US4235624A (en) | Method for processing coke oven gas | |
| CN104745757B (en) | A kind of microwave fuel combined heat formula coal-based direct reduction method and rotary hearth furnace | |
| CN102605132A (en) | Method for producing direct reduction iron by aid of coke oven gas | |
| CN107447068A (en) | A kind of method and system of coal pyrolysis gas reduction schreyerite | |
| CN106191431B (en) | A kind of reduction reaction system and method for the aqueous pelletizing of lateritic nickel ore | |
| CN102312081B (en) | Method of preparing nickel alloy from nickel laterite ores with vehicle rapid reducing furnace | |
| US10851430B2 (en) | Flash ironmaking system and method | |
| CN114959152A (en) | Method for producing reduced iron by two-section type electric heating and shaft furnace device | |
| CN114410873A (en) | Pure hydrogen shaft furnace iron-making device and method based on microwave preheating of iron-containing furnace charge | |
| CN103710550A (en) | Method for poly-generation and large-scale coupling production based on semi coke and magnesium | |
| CN203550523U (en) | Double-tube rolling tube furnace | |
| CN103205519B (en) | Technology for extracting iron from steel-making and ironmaking fly ash by micro-wave heating | |
| CN101054608A (en) | Application of coke oven exhaust gas in coke preheating process | |
| CN101008071A (en) | Modified silicon steel sheet processing method | |
| CN2652942Y (en) | Non-muffle stainless steel strip bright annealing furnace | |
| CN202912997U (en) | Intermediate frequency furnace for producing direct-reduced iron | |
| CN204455171U (en) | A kind of entire body external heat flame-insulating type rotary kiln | |
| CN202912999U (en) | Reduction furnace for producing direct-reduced iron | |
| CN202912998U (en) | Reduction furnace provided with heating liner and used for producing direct-reduced iron |
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 | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20231011 Address after: 1st Floor, Building 1, Group 7, Banqiao Village, Economic Development Zone, Mianyang City, Sichuan Province, 621000 Applicant after: Sichuan Huiwei Rongda Technology Co.,Ltd. Address before: 435003 room 701, unit 1, dexinyuan, No. 22, Suzhou Road, Xialu District, Huangshi City, Hubei Province Applicant before: Zhang Wei |