CN114854911B - Device and method for utilizing heat energy of high-temperature steel slag - Google Patents
Device and method for utilizing heat energy of high-temperature steel slag Download PDFInfo
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- CN114854911B CN114854911B CN202210439083.9A CN202210439083A CN114854911B CN 114854911 B CN114854911 B CN 114854911B CN 202210439083 A CN202210439083 A CN 202210439083A CN 114854911 B CN114854911 B CN 114854911B
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- China
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- temperature
- steel slag
- slag
- steel
- scraper
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- 239000002893 slag Substances 0.000 title claims abstract description 121
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 117
- 239000010959 steel Substances 0.000 title claims abstract description 117
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000007787 solid Substances 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 3
- 238000009776 industrial production Methods 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 3
- 238000007885 magnetic separation Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 3
- 238000000605 extraction Methods 0.000 abstract description 3
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 239000013049 sediment Substances 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910001341 Crude steel Inorganic materials 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
- C21B3/08—Cooling slag
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
- C21B2400/022—Methods of cooling or quenching molten slag
- C21B2400/024—Methods of cooling or quenching molten slag with the direct use of steam or liquid coolants, e.g. water
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
- C21B2400/022—Methods of cooling or quenching molten slag
- C21B2400/026—Methods of cooling or quenching molten slag using air, inert gases or removable conductive bodies
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/08—Treatment of slags originating from iron or steel processes with energy recovery
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Furnace Details (AREA)
Abstract
The invention relates to the technical field of industrial energy conservation, in particular to a device and a method for utilizing heat energy of high-temperature steel slag, which comprises the steps of crushing high-temperature solid steel slag (300-1100 ℃) into high-temperature steel slag with uniform specification; introducing the uniform high-temperature steel slag into a slag cooler for heat exchange to discharge cooled steel slag; and (3) the cooled steel slag enters the existing steel slag treatment working procedures (heat stewing\piling\magnetic separation and the like) of a steel mill for treatment. The invention provides an efficient way for high-quality application of steel slag heat energy by embedding the steel slag into the existing steel slag treatment process of a steel mill and utilizing air or water to carry out wall-type heat extraction on high-temperature steel slag. Meanwhile, as the early stage of crushing treatment, the granularity of the steel slag is fine and uniform, and the subsequent heat stewing effect of the steel slag is promoted. The steel slag after heat stewing does not need to be broken before magnetic separation, so that the steel slag treatment cost is reduced.
Description
Technical Field
The invention relates to the technical field of industrial energy conservation, in particular to a device and a method for utilizing heat energy of high-temperature steel slag.
Background
The crude steel yield in 2020 reaches 10.65 hundred million tons, which is the first global in China; the steel slag produced during the steelmaking process is about 1.20 hundred million tons. How to realize the deep effective utilization of the steel slag is a profound problem. The steel industry is one of the industries with the largest carbon emission in China, and the steel carbon reduction is far in optional and imperative, so that the possibility and the challenge coexist. In the current mainstream steel slag treatment process, firstly, the temperature of the steel slag is reduced to below 500 ℃ from 1500 ℃ by adopting a physical method, then the next treatment is carried out, and the waste heat utilization of the steel slag is almost zero, thus causing huge energy waste.
Disclosure of Invention
The invention aims to provide a device and a method for utilizing heat energy of high-temperature steel slag, and aims to solve the problem of huge energy waste caused by almost zero utilization of waste heat of steel slag in the existing steel slag treatment process.
In order to achieve the above object, in a first aspect, the present invention provides a device for utilizing heat energy of high temperature steel slag, comprising:
including first crawler-type high temperature scraper machine, connect feed bin, high temperature breaker, receive feed bin, second crawler-type high temperature scraper machine, cold sediment ware and crawler-type scraper machine, receive the feed bin with first crawler-type high temperature scraper machine is connected, high temperature breaker with receive the feed bin and be connected, connect the feed bin with high temperature breaker is connected, second crawler-type high temperature scraper machine with connect the feed bin connect cold sediment ware with second crawler-type high temperature scraper machine is connected, crawler-type scraper machine with cold sediment ware is connected.
The slag cooler adopts a dividing wall type heat exchange slag cooler, and the slag cooler is equipment for cooling high-temperature materials.
The first crawler-type scraper machine and the second crawler-type scraper machine are solid lump material conveying tools driven by a gear disc driven by a motor through combination of heat-resistant steel and a water cooling wall.
Wherein, the crushing working face of the high-temperature crusher adopts a mode of heat-resistant high-strength steel and a cooling sleeve to finish continuous crushing of high-temperature materials.
In a second aspect, the present invention also provides a method for utilizing heat energy of high-temperature steel slag, which is applied to the device for utilizing heat energy of high-temperature steel slag according to claim 1, and comprises the following steps:
crushing the high-temperature solid steel slag into high-temperature steel slag with uniform specification and inputting the high-temperature steel slag into the receiving bin;
introducing the high-temperature steel slag from the receiving bin through the second crawler type high-temperature scraper into a slag cooler for heat exchange to generate high-temperature hot water and hot air and cool the steel slag;
introducing the high-temperature hot water and hot air into other industrial production for recycling;
and discharging the cooled steel slag from the slag cooler and inputting the cooled steel slag into a steel mill through the crawler scraper machine for treatment in a subsequent steel slag treatment procedure.
The high-temperature liquid steel slag is liquid steel slag with the temperature of 1500 ℃, the high-temperature solid steel slag is steel slag with the specification of 0mm to 900mm and the temperature of 300 ℃ to 1100 ℃, and the uniform high-temperature steel slag is solid steel slag with the specification of 0mm to 40mm and the temperature of 300 ℃ to 900 ℃.
The device and the method for utilizing the heat energy of the high-temperature steel slag can be embedded into the existing steel slag treatment process of a steel mill, air or water is utilized to carry out wall-type heat extraction on the high-temperature steel slag, and an efficient mode is provided for high-quality application of the heat energy of the steel slag. Meanwhile, as the early stage of crushing treatment, the granularity of the steel slag is fine and uniform, and the subsequent heat stewing effect of the steel slag is promoted: the slag-iron separation is better, and the stability of the steel slag after magnetic separation is better. The steel slag after heat stewing does not need to be broken before magnetic separation, so that the steel slag treatment cost is reduced. Has important significance for reducing the comprehensive energy consumption of iron and steel enterprises.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for utilizing heat energy of high-temperature steel slag.
Fig. 2 is a front view of a device for utilizing heat energy of high-temperature steel slag according to the present invention.
Fig. 3 is a top view of an apparatus for utilizing heat energy of high temperature steel slag according to the present invention.
1-a first crawler type high-temperature scraper, 2-a receiving bin, 3-a high-temperature crusher, 4-a receiving bin, 5-a second crawler type high-temperature scraper, 6-a slag cooler and 7-crawler type scraper.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
Referring to fig. 2 to 3, in a first aspect, the present invention provides a device for utilizing heat energy of high temperature steel slag, comprising:
including first crawler-type high temperature scraper 1, connect feed bin 2, high temperature breaker 3, receive feed bin 4, second crawler-type high temperature scraper 5, cold sediment ware 6 and crawler-type scraper 7, receive feed bin 4 with first crawler-type high temperature scraper 1 fixed connection, and be located one side of first crawler-type high temperature scraper 1, water-cooling high temperature breaker 3 with receive feed bin 4 fixed connection, and be located one side of receive feed bin 4, connect feed bin 2 with high temperature breaker 3 fixed connection, and be located one side of high temperature breaker 3, second crawler-type high temperature scraper 5 with connect feed bin 2 fixed connection, and be located one side of connect feed bin 2, cold sediment ware 6 with second crawler-type high temperature scraper 5 fixed connection, and be located one side of second crawler-type high temperature scraper 5, crawler-type scraper 7 with cold sediment ware 6 fixed connection, and be located one side of cold sediment ware 6.
Wherein, the slag cooler 6 adopts a dividing wall type heat exchange slag cooler, and the slag cooler 6 is equipment for cooling high-temperature materials.
The first crawler-type high-temperature scraper machine 1 and the second crawler-type high-temperature scraper machine 5 are solid lump material conveying tools driven by a gear disc driven by a motor through combination of heat-resistant steel and a water cooling wall.
Wherein, the crushing working face of the high-temperature crusher 3 adopts a mode of heat-resistant high-strength steel and a cooling sleeve to finish continuous crushing of high-temperature materials.
In a second aspect, referring to fig. 1, the present invention further provides a method for utilizing heat energy of high temperature steel slag, including:
s101, crushing high-temperature solid steel slag into high-temperature steel slag with uniform specification and inputting the high-temperature steel slag into the receiving bin;
s102, introducing the high-temperature steel slag from the receiving bin through the second crawler type high-temperature scraper into a slag cooler for heat exchange to generate high-temperature hot water and hot air and cool the steel slag;
s103, introducing the high-temperature hot water and the hot air into other industrial production for recycling;
s104, discharging the cooled steel slag from the slag cooler and inputting the cooled steel slag into a steel mill through the crawler scraper machine for treatment in a subsequent steel slag treatment process.
The subsequent steel slag treatment comprises the working procedures of hot disintegrating, piling, magnetic separation and the like.
The high-temperature liquid steel slag is liquid steel slag with the temperature of 1500 ℃, the high-temperature solid steel slag is steel slag with the specification of 0mm to 900mm and the temperature of 300 ℃ to 1100 ℃, and the uniform high-temperature steel slag is solid steel slag with the specification of 0mm to 40mm and the temperature of 300 ℃ to 900 ℃.
The method for utilizing the heat energy of the high-temperature steel slag can be embedded into the existing steel slag treatment process of a steel mill, and air or water is utilized to carry out wall-type heat extraction on the high-temperature steel slag, so that an efficient mode is provided for high-quality application of the heat energy of the steel slag. Meanwhile, as the early stage of crushing treatment, the granularity of the steel slag is fine and uniform, and the subsequent heat stewing effect of the steel slag is promoted: the slag-iron separation is better, and the stability of the steel slag after magnetic separation is better. The steel slag after heat stewing does not need to be broken before magnetic separation, so that the steel slag treatment cost is reduced.
The above disclosure is only a preferred embodiment of the present invention, and it should be understood that the scope of the invention is not limited thereto, and those skilled in the art will appreciate that all or part of the procedures described above can be performed according to the equivalent changes of the claims, and still fall within the scope of the present invention.
Claims (5)
1. A device for utilizing heat energy of high-temperature steel slag is characterized in that,
the device comprises a first crawler type high-temperature scraper, a receiving bin, a high-temperature crusher, a receiving bin, a second crawler type high-temperature scraper, a slag cooler and a crawler type scraper, wherein the receiving bin is connected with the first crawler type high-temperature scraper, the high-temperature crusher is connected with the receiving bin, the receiving bin is connected with the high-temperature crusher, the second crawler type high-temperature scraper is connected with the receiving bin, the slag cooler is connected with the second crawler type high-temperature scraper, and the crawler type scraper is connected with the slag cooler;
the method for utilizing the heat energy of the high-temperature steel slag comprises the following steps:
comprises the steps of crushing high-temperature solid steel slag into high-temperature steel slag with uniform specification and inputting the high-temperature steel slag into the receiving bin;
introducing the high-temperature steel slag from the receiving bin through the second crawler type high-temperature scraper into a slag cooler for heat exchange to generate high-temperature hot water and hot air and cool the steel slag;
introducing the high-temperature hot water and hot air into other industrial production for recycling;
and discharging the cooled steel slag from the slag cooler and inputting the cooled steel slag into a steel mill through the crawler scraper machine for treatment in a subsequent steel slag treatment procedure.
2. The device for utilizing heat energy of high-temperature steel slag according to claim 1, wherein the device comprises a main body,
the slag cooler adopts a dividing wall type heat exchange slag cooler, and the slag cooler is equipment for cooling high-temperature materials.
3. The device for utilizing heat energy of high-temperature steel slag according to claim 1, wherein the device comprises a main body,
the high-temperature crawler scraper is a solid lump material conveying tool driven by a gear disc driven by a motor by combining heat-resistant steel and a water cooling wall.
4. The device for utilizing heat energy of high-temperature steel slag according to claim 2, wherein the device comprises a main body,
the crushing working face of the high-temperature crusher adopts a mode of adding a cooling sleeve into heat-resistant high-strength steel to finish continuous crushing of high-temperature materials.
5. The device for utilizing heat energy of high-temperature steel slag according to claim 1, wherein the device comprises a main body,
the high-temperature liquid steel slag is liquid steel slag with the temperature of 1500 ℃, the high-temperature solid steel slag is steel slag with the specification of 0mm to 900mm and the temperature of 300 ℃ to 1100 ℃, and the uniform high-temperature steel slag is solid steel slag with the specification of 0mm to 40mm and the temperature of 300 ℃ to 900 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210439083.9A CN114854911B (en) | 2022-04-22 | 2022-04-22 | Device and method for utilizing heat energy of high-temperature steel slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210439083.9A CN114854911B (en) | 2022-04-22 | 2022-04-22 | Device and method for utilizing heat energy of high-temperature steel slag |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114854911A CN114854911A (en) | 2022-08-05 |
| CN114854911B true CN114854911B (en) | 2023-11-24 |
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| CN202210439083.9A Active CN114854911B (en) | 2022-04-22 | 2022-04-22 | Device and method for utilizing heat energy of high-temperature steel slag |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4062672A (en) * | 1974-10-21 | 1977-12-13 | Entreprise Gagneraud Pere Et Fils | Process for improving the fragmentation capability of metallurgical slags and cinders |
| DE3102296A1 (en) * | 1981-01-24 | 1982-09-02 | Kawasaki Jukogyo K.K. | Apparatus for recovering heat from molten slag |
| JP2011220599A (en) * | 2010-04-08 | 2011-11-04 | Jfe Steel Corp | Steel slag thermal energy recovery method |
| CN102443661A (en) * | 2012-01-10 | 2012-05-09 | 山西太钢不锈钢股份有限公司 | Hot stewing one-step water spraying method of converter steel slag |
| JP2016102261A (en) * | 2014-11-12 | 2016-06-02 | Ｊｆｅスチール株式会社 | Method and system for recovering heat of slag |
| CN109182628A (en) * | 2018-08-27 | 2019-01-11 | 浙江哈斯科节能技术有限公司 | A kind of cooling equipment of hot melt steel slag dry method |
| CN110530165A (en) * | 2019-09-26 | 2019-12-03 | 中冶节能环保有限责任公司 | A kind of steel slag waste heat is using device and utilizes method |
| CN112251548A (en) * | 2020-08-29 | 2021-01-22 | 钟赛梅 | Steel slag waste heat utilization device and operation mode thereof |
| WO2021115029A1 (en) * | 2019-12-12 | 2021-06-17 | 青岛理工大学 | Iron-containing metallurgical slag granule graded waste heat recovery and direct reduction system and method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9016477B2 (en) * | 2012-03-19 | 2015-04-28 | Mid-American Gunite, Inc. | Method and system for processing slag material |
| CN102952908B (en) * | 2012-10-15 | 2014-07-30 | 唐山钢铁国际工程技术有限公司 | Equipment and method for steel slag air quenching and waste heat recycling |
| CN214422670U (en) * | 2021-03-19 | 2021-10-19 | 中冶节能环保有限责任公司 | High temperature slag waste heat recovery device |
-
2022
- 2022-04-22 CN CN202210439083.9A patent/CN114854911B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4062672A (en) * | 1974-10-21 | 1977-12-13 | Entreprise Gagneraud Pere Et Fils | Process for improving the fragmentation capability of metallurgical slags and cinders |
| DE3102296A1 (en) * | 1981-01-24 | 1982-09-02 | Kawasaki Jukogyo K.K. | Apparatus for recovering heat from molten slag |
| JP2011220599A (en) * | 2010-04-08 | 2011-11-04 | Jfe Steel Corp | Steel slag thermal energy recovery method |
| CN102443661A (en) * | 2012-01-10 | 2012-05-09 | 山西太钢不锈钢股份有限公司 | Hot stewing one-step water spraying method of converter steel slag |
| JP2016102261A (en) * | 2014-11-12 | 2016-06-02 | Ｊｆｅスチール株式会社 | Method and system for recovering heat of slag |
| CN109182628A (en) * | 2018-08-27 | 2019-01-11 | 浙江哈斯科节能技术有限公司 | A kind of cooling equipment of hot melt steel slag dry method |
| CN110530165A (en) * | 2019-09-26 | 2019-12-03 | 中冶节能环保有限责任公司 | A kind of steel slag waste heat is using device and utilizes method |
| WO2021115029A1 (en) * | 2019-12-12 | 2021-06-17 | 青岛理工大学 | Iron-containing metallurgical slag granule graded waste heat recovery and direct reduction system and method |
| CN112251548A (en) * | 2020-08-29 | 2021-01-22 | 钟赛梅 | Steel slag waste heat utilization device and operation mode thereof |
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| Publication number | Publication date |
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| CN114854911A (en) | 2022-08-05 |
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