CN117070676A - Waste heat utilization in cooling slag produced from iron and steel production - Google Patents
Waste heat utilization in cooling slag produced from iron and steel production Download PDFInfo
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- CN117070676A CN117070676A CN202310547568.4A CN202310547568A CN117070676A CN 117070676 A CN117070676 A CN 117070676A CN 202310547568 A CN202310547568 A CN 202310547568A CN 117070676 A CN117070676 A CN 117070676A
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- heat exchange
- heat
- storage device
- exchange fluid
- contact surface
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- 239000002893 slag Substances 0.000 title claims abstract description 68
- 239000002918 waste heat Substances 0.000 title claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 title claims description 25
- 239000010959 steel Substances 0.000 title claims description 25
- 238000001816 cooling Methods 0.000 title description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title description 6
- 238000004519 manufacturing process Methods 0.000 title description 5
- 229910052742 iron Inorganic materials 0.000 title description 3
- 239000012530 fluid Substances 0.000 claims abstract description 56
- 238000005338 heat storage Methods 0.000 claims abstract description 30
- 238000003860 storage Methods 0.000 claims abstract description 26
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 238000010248 power generation Methods 0.000 claims description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 7
- 239000011819 refractory material Substances 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 150000003839 salts Chemical class 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000000395 magnesium oxide Substances 0.000 claims description 4
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 4
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 229910052734 helium Inorganic materials 0.000 claims description 3
- 239000001307 helium Substances 0.000 claims description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 2
- 239000003570 air Substances 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 229910001570 bauxite Inorganic materials 0.000 claims description 2
- 239000000292 calcium oxide Substances 0.000 claims description 2
- 239000004927 clay Substances 0.000 claims description 2
- 229910052570 clay Inorganic materials 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 150000001247 metal acetylides Chemical class 0.000 claims description 2
- 150000002739 metals Chemical class 0.000 claims description 2
- 229910052750 molybdenum Inorganic materials 0.000 claims description 2
- 239000011733 molybdenum Substances 0.000 claims description 2
- 229910000476 molybdenum oxide Inorganic materials 0.000 claims description 2
- 239000003921 oil Substances 0.000 claims description 2
- PQQKPALAQIIWST-UHFFFAOYSA-N oxomolybdenum Chemical compound [Mo]=O PQQKPALAQIIWST-UHFFFAOYSA-N 0.000 claims description 2
- -1 platinum group metals Chemical class 0.000 claims description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 2
- 229910052721 tungsten Inorganic materials 0.000 claims description 2
- 239000010937 tungsten Substances 0.000 claims description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims 1
- 235000012255 calcium oxide Nutrition 0.000 claims 1
- 229910003460 diamond Inorganic materials 0.000 claims 1
- 239000010432 diamond Substances 0.000 claims 1
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 claims 1
- 238000000034 method Methods 0.000 description 13
- 238000000265 homogenisation Methods 0.000 description 7
- 238000010924 continuous production Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000002274 desiccant Substances 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000010310 metallurgical process Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 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
- C21B3/08—Cooling slag
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/04—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being hot slag, hot residues, or heated blocks, e.g. iron blocks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- 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
- C21B2400/052—Apparatus features including rotating parts
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
- F27D2017/007—Systems for reclaiming waste heat including regenerators
Abstract
The invention relates to a device for utilizing waste heat of slag (10), wherein the device has a first feed region, wherein the first feed region has a first contact surface, wherein the first contact surface is designed for the direct planar application of liquid slag (10), wherein a first heat storage device (30) is arranged below the first contact surface of the first feed region and in thermal contact with the first contact surface, wherein a first heat exchange device through which a heat exchange fluid can flow is arranged below the first heat storage device (30) or in the first heat storage device and in thermal contact with the first heat storage device (30), wherein the first heat exchange device is fluidically connected to a first heat exchange fluid storage device.
Description
Technical Field
The present invention relates to a method and a device for utilizing waste heat generated when cooling slag, for example for generating electrical energy.
Background
Slag is produced in metallurgical processes, for example in the production of pig iron in a blast furnace or in the production of steel in an electric arc furnace or LD-converter, but also in other processes, in particular in metal processing, for example in foundry. Slag is in principle a by-product of the process, which can be used as filler or aggregate in other processes or products, for example. Slag is usually produced at high temperatures in the process, for example in a blast furnace or in a steel plant. In this case, the thermal energy of the slag during the production of slag is generally very high, typically in the range of 1.5 to 2GJ per ton of slag, due to the high process temperature, typically above 1450 ℃. Nevertheless, the slag is currently mainly poured in an open slag bed, where it is subsequently cooled slowly by means of air cooling and/or water cooling and without any heat utilization or energy recovery. For further use, the cooled slag is typically crushed, iron removed, and typically sieved and/or classified.
There are solutions in which air is heated by the high temperature of the slag upon cooling and is subsequently used as a drying agent in other processes. However, the requirements and application possibilities of hot air for drying purposes are limited and, furthermore, the space required for the drying apparatus for this is very high.
Since the thermal energy reaches very high levels, for example, steel mill slag is mainly in the molten state and is in most cases poured into the slag bed at temperatures exceeding 1300 ℃, it is desirable to convert into a form of energy of as high quality as possible, for example and in particular to generate electric current.
However, this process is also problematic in that slag is formed only in a discontinuous manner. Thus, this cannot be directly linked to a continuous process.
Disclosure of Invention
The aim of the invention is to utilize waste heat when producing slag.
This object is achieved by a device having the features given in claim 1. Advantageous refinements are given by the dependent claims, the following description and the accompanying drawings.
The device according to the invention is used for utilizing the waste heat of slag. The slag source can be very different here. For example, it may be blast furnace slag, cupola slag, steel mill slag, in particular converter slag, electric furnace slag, stainless steel slag or secondary metallurgical slag or molten metal bath slag. The apparatus has a first feed zone. Molten slag having a temperature, for example, above 1250 ℃ is added to a first feed zone, which may be disposed in a slag bed, for example. The first feed zone has a first contact surface, wherein the first contact surface is configured for direct planar application of liquid slag. The first contact surface is thus adapted to directly coat the liquid and flowable slag and bring it into direct thermal contact. A first heat storage device is arranged below and in thermal contact with the first contact surface of the first feed region. The heat storage device, for example comprising a metallic construction with refractory material contained therein, has two purposes. On the one hand, the maximum temperature peak is reduced when new hot slag is applied. Thus, the heat exchange fluid located thereunder will not be locally and/or instantaneously overheated. The second effect is that the output of thermal energy is also elongated, even if only slightly elongated, thus achieving the first temporal homogenization effect. A first heat exchange device through which a heat exchange fluid can flow is arranged below or in the first heat storage device and in thermal contact with the first heat storage device. An example of a first heat exchange means in the first heat storage means is a pipe or conduit arranged in, for example, a refractory wall, through which a heat exchange fluid may flow. Another example is a first heat exchange device of pipes or ducts present in the first heat storage device, arranged in the form of a stack of e.g. crushed or granulated slag, through which the pipes or ducts can be flowed by a heat exchange fluid. One example of a first heat exchange device below the first heat storage device may be, for example, a copper block with channels introduced therein for the passage of a heat exchange fluid. The first heat exchange device is fluidly connected to the first heat exchange fluid storage device. The cold heat exchange fluid flows into the heat exchange device, is heated there and is guided from there in a heated manner into the heat exchange fluid storage device. Preferably, the flow rate matches the outlet temperature of the heat exchange fluid. Thus, immediately after slag application, very much heat exchange fluid is delivered, the delivered amount of which decreases with cooling, but the temperature preferably remains constant. In a preferred embodiment, the first heat exchange fluid storage device is connected to the first power generation device. Here, the connection may be direct or indirect. If the heat exchange fluid is water, which is thus heated to e.g. 500 ° steam, a direct connection may be advantageous. The steam can then be fed directly to the corresponding turbine of the first power generation device. If the heat exchange fluid is molten salt, an indirect connection is of interest, i.e. in particular the molten salt generates steam in a further heat exchanger, which steam is then applied to the turbine. The homogenization is achieved by the first heat exchange fluid storage means and the discontinuous process of slag cooling can be effectively associated with continuous power generation. Furthermore, just as well in order to utilize "lower value" heat, thermoelectric converters (thermoelectric generators, thermocouples, peltier elements) can be used, for example, for generating electricity. The efficiency of up to 17% is significantly lower than that achievable by means of the carnot process, but can be embodied particularly firmly and with little maintenance as a component without moving parts.
The heat obtained can also be used in two stages, i.e. in particular the highest temperature is used in the first step for generating the current, and the waste heat is then fed into the remote thermal system.
In a further embodiment of the invention, a protective layer, in particular formed from crushed slag, is arranged on the first contact surface of the feed zone of the device. Thereby protecting the device located thereunder. In addition, the pulverized slag serves as an additional heat storage device, which reduces temperature peaks during liquid slag feeding. Meanwhile, by using the cold crushed slag, pollution of mineral slag products (e.g., prepared aggregate) by the crushed slag in the protective layer does not occur. Preferably, slag is used as the crushed slag, which is cooled and solidified during the preamble and thus is chemically largely identical to the new liquid slag. Furthermore, the aggregate of the crushed slag can be optimized in particular with regard to the energy requirements required for crushing.
In another embodiment of the invention, the first contact surface of the feed zone is a steel trough. In particular, the first contact surface of the feed region is detachably connected to the first heat storage device. In particular, the steel bath is taken out after the slag is cooled to remove the slag. Preferably, another steel bath may then be introduced so that the next batch of slag may already be cooled.
In another alternative embodiment of the invention, the first contact surface of the feed zone is a rotating steel strip. The steel strip, preferably in the form of an endless conveyor belt, may be rotated only after the slag has cooled, or may be rotated continuously.
In another embodiment of the invention, the first heat storage means is made of a refractory material. The refractory materials have in particular oxides, in particular silicon dioxide, aluminum oxide, magnesium oxide, calcium oxide, zirconium oxide and chromium oxide, silicon carbide, molybdenum and/or tungsten and/or platinum group metals as metals, alloys, oxides or carbides.
In another embodiment of the invention, the refractory material has at least one material selected from the group consisting of refractory clay, silica, magnesia, silicon carbide, bauxite, corundum, molybdenum oxide.
In another embodiment of the invention, the heat exchange fluid is selected from the group comprising air, helium, water, heat transfer oil, molten salt. A temperature of 900 c can also be easily achieved with air or helium. This achieves a high efficiency of heat to electricity conversion but leaves a large amount of heat unused.
In another embodiment of the invention, the apparatus has a second feed zone. The second heat storage device is arranged below and in thermal contact with the second feed region. A second heat exchange device through which a heat exchange fluid can flow is arranged below or inside the second heat storage device, and is in thermal contact with the second heat storage device. The second heat exchange device is fluidly connected to the first heat exchange fluid storage device. By means of the parallel connection, the second feed zone can already be filled with new hot slag, while in the first feed zone the slag is still cooling.
In a further embodiment of the invention, a third heat exchange device is arranged below the first heat exchange device, through which a further heat exchange fluid can flow. The third heat exchange device is fluidly connected to the third heat exchange fluid storage device. The third heat exchange fluid storage device may be directly or indirectly connected to the first power generation device or the second power generation device.
In another embodiment of the invention, the first heat exchange fluid storage device is connected to a first power generation device. Here, the connection may be direct or indirect. For example if the heat exchange fluid is water, which is thus heated to steam of for example 500 °, a direct connection may be advantageous. The steam can then be fed directly to the corresponding turbine of the first power generation device. If the heat exchange fluid is molten salt, the indirect connection may make sense, i.e. in particular the molten salt generates steam in another heat exchanger, which steam is then applied to the turbine. The homogenization is achieved by the first heat exchange fluid storage means and the discontinuous process of slag cooling can be effectively associated with continuous power generation.
In a further embodiment of the invention, the first power generation device is fluidly connected to the first heat exchange device via a second heat exchange fluid storage device for storing cold heat exchange fluid. Thereby an efficient circulation guidance of the heat exchange fluid can be achieved. The heat exchange fluid discharged from the continuous process of the power plant in the second heat exchange fluid storage means again provides a discontinuous process for slag cooling.
Of course, other parallel feed zones are also possible.
In another embodiment of the invention, the first heat exchange fluid storage device is connected to a heat utilization device, in particular a remote heat supply network.
Drawings
The device according to the invention is explained in detail below with the aid of the embodiments shown in the drawings.
Figure 1 shows a first example of this,
fig. 2 shows a second example.
Detailed Description
A first example is shown in fig. 1. The first device of the first example has a steel groove 20 as a first contact surface. A layer of crushed slag 12 is arranged in the steel channel 20. Liquid slag 10 is poured from a slag bath 14 into a steel bath 20. The heat of the slag 10, for example fed at 1300 ℃, is transferred via the steel bath 20 to the first heat storage device 30, whereby homogenization is achieved by heating the first heat storage device 30, so that, instead of the temperature peak, for example at 1300 ℃, reaching the first heat exchange device 40, for example only 750 ℃ remains. While higher temperature levels remain for longer periods of time. For further homogenization, the heat exchange fluid is fed from the first heat exchange device 40 into the first heat exchange fluid storage device 50. The heat exchange fluid is transferred from the first heat exchange fluid storage device 50 to the power generation device 60 and from the power generation device 60 to the second heat exchange fluid storage device 70 so that cold heat exchange fluid may also be buffered. The heat exchange fluid is then led from the second heat exchange fluid storage means 70 into the heat exchange means 40 again and thus in the circuit. In the example shown, the heat exchange device 40 is embodied as a tube bundle heat exchanger.
In order to achieve further homogenization, two, preferably four, particularly preferably more devices according to the invention are configured parallel to one another. Since the steel bath 20 is filled in a batch operation and then cooled slowly and the cooling process is also generally longer than the duration of producing these quantities of slag, a homogenization of the temperature of the heat exchange fluid can be achieved by the parallel connection and the common use of the first heat exchange fluid storage device 50. This also makes the power transmission to the power generation device 60 uniform.
Fig. 2 shows a second example, which differs from the first example shown in fig. 1 in that the first contact surface is embodied as a steel strip 22. The steel strip transports slag 10 from the feed through the first heat storage device 30 and thereby outputs heat through the first heat storage device 30 to the heat exchange fluid within the first heat exchange device 40. The other components are identical.
In the first example, the steel trough 20 must be cyclically removed and emptied, which is done on the steel strip 22 of the second example at the ends of the steel strip 22, respectively. Thus, the second example is particularly suited for an almost continuous supply of slag 10.
Description of the reference numerals
10. Slag of furnace
12. Crushed slag
14. Slag pool
20. Steel groove
22. Steel strip
30. First heat storage device
40. First heat exchanging device
50. First heat exchange fluid storage device
60. Power generation device
70. Second heat exchange fluid storage device
Claims (13)
1. An apparatus for utilizing waste heat of slag (10), wherein the apparatus has a first feed region, wherein the first feed region has a first contact surface, wherein the first contact surface is designed for the direct planar application of liquid slag (10), wherein a first heat storage device (30) is arranged below the first contact surface of the first feed region and in thermal contact with the first contact surface, wherein a first heat exchange device (40) through which a heat exchange fluid can flow is arranged below or in the first heat storage device (30) and in thermal contact with the first heat storage device (30), wherein the first heat exchange device (40) is fluidically connected to a first heat exchange fluid storage device.
2. The apparatus according to claim 1, characterized in that the first contact surface of the feed zone is a steel groove (20).
3. The device according to any of the preceding claims, characterized in that the first contact surface of the feed area is detachably connected with the first heat storage device (30).
4. The apparatus of claim 1, wherein the first contact surface of the feed zone is a rotating steel belt (22).
5. The device according to any of the preceding claims, characterized in that the first heat storage means (30) is made of a refractory material.
6. The device according to claim 5, characterized in that the refractory material comprises oxides, in particular silica, alumina, magnesia, calcia, zirconia and chromia, silicon carbide, molybdenum and/or tungsten and/or platinum group metals as metals, alloys, oxides or carbides.
7. The apparatus of claim 5, wherein the refractory material comprises at least one material selected from the group consisting of: refractory clay, silica, magnesia, silicon carbide, bauxite, diamond, molybdenum oxide.
8. The apparatus of any one of the preceding claims, wherein the heat exchange fluid is selected from the group consisting of air, helium, water, heat transfer oil, molten salt.
9. The apparatus according to any of the preceding claims, characterized in that the apparatus has a second feed region, wherein the second feed region has a second contact surface, wherein the second contact surface is configured for the direct planar application of the liquid slag (10), wherein a second heat storage device (30) is arranged below the second contact surface of the second feed region and in thermal contact with the second contact surface, wherein a second heat exchange device (70) through which a heat exchange fluid can flow is arranged below or in the second heat storage device (30) and in thermal contact with the second heat storage device (30), wherein the second heat exchange device (70) is fluidically connected with the first heat exchange fluid storage device.
10. Device according to any of the preceding claims, characterized in that a third heat exchange device through which a further heat exchange fluid can flow is arranged below the first heat exchange device (40), wherein the third heat exchange device is fluidically connected to a third heat exchange fluid storage device.
11. The apparatus according to any of the preceding claims, wherein the first heat exchange fluid storage means is connected to a first power generation means (60).
12. The device according to claim 11, characterized in that the first power generation device is fluidly connected to the first heat exchange device (40) by means of a second heat exchange fluid storage device for storing cold heat exchange fluid.
13. The device according to any of the preceding claims, wherein the first heat exchange fluid storage device is connected to a heat utilization device, in particular a remote heat supply network.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022204808.3 | 2022-05-16 | ||
| DE102022204808.3A DE102022204808A1 (en) | 2022-05-16 | 2022-05-16 | Use of waste heat when cooling slag from iron and steel production |
| BEBE2022/5371 | 2022-05-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117070676A true CN117070676A (en) | 2023-11-17 |
Family
ID=88510591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310547568.4A Pending CN117070676A (en) | 2022-05-16 | 2023-05-16 | Waste heat utilization in cooling slag produced from iron and steel production |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN117070676A (en) |
| DE (1) | DE102022204808A1 (en) |
-
2022
- 2022-05-16 DE DE102022204808.3A patent/DE102022204808A1/en active Pending
-
2023
- 2023-05-16 CN CN202310547568.4A patent/CN117070676A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE102022204808A1 (en) | 2023-11-16 |
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