CN111593170A - Optimization improvement method for reducing installation height of KR desulfurization system - Google Patents
Optimization improvement method for reducing installation height of KR desulfurization system Download PDFInfo
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- CN111593170A CN111593170A CN202010322213.1A CN202010322213A CN111593170A CN 111593170 A CN111593170 A CN 111593170A CN 202010322213 A CN202010322213 A CN 202010322213A CN 111593170 A CN111593170 A CN 111593170A
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- 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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/064—Dephosphorising; Desulfurising
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention relates to an optimization and improvement method for reducing the installation height of a KR desulfurization system, which comprises the following steps: 1) optimizing a stirring system; 2) optimizing a feeding system; 3) optimizing a paddle changing vehicle system; 4) optimizing a spare storage bin system; the invention can reduce the installation height of the prior KR desulfurization facility by about 8.5 meters, thereby successfully installing the KR stirring desulfurization facility with high efficiency and low cost in a plant less than 20 meters and being beneficial to the popularization and application of the KR mechanical stirring desulfurization process.
Description
Technical Field
The invention relates to the technical field of KR desulfurization, in particular to an optimization improvement method for reducing the installation height of a KR desulfurization system.
Background
Currently, a typical common molten iron desulfurization treatment method includes: blowing and KR mechanical agitation.
The desulfurization principle of the blowing method is as follows: using inert gas (nitrogen or argon) as gas carrier to remove desulfurizer (such as CaO, CaC)2And Mg) is sprayed into molten iron by a spray gun, and the carrier gas plays a role in stirring the molten iron at the same time, so that the sprayed gas, the desulfurizer and the molten iron are fully mixed for desulfurization.
KR mechanical stirring desulfurization principle: the cross-shaped stirring head which is formed by pouring refractory materials is immersed into a molten pool of a foundry ladle for a certain depth and rotates after being baked, and when molten iron forms a vortex, a desulfurizing agent is put into the molten iron to be in full contact reaction with the molten iron, so that the aim of desulfurization is fulfilled.
KR mechanical stirring desulphurization is accepted by the majority of steel enterprises due to the advantages of superior dynamic conditions, low operation cost per ton of steel, relatively stable desulphurization effect, high efficiency and the like, and has the tendency of gradually replacing blowing desulphurization.
In the process of pushing the KR mechanical stirring method desulfurization process, the existing old blowing method desulfurization process is basically modified, and the original factory structure is unchanged; however, the original factory building structure is designed according to a blowing desulfurization process, and the problem of narrow effective space generally exists, so that how to successfully arrange KR process facilities in the factory building with the effective space less than 20 meters is a problem which needs to be solved urgently.
Disclosure of Invention
The invention provides an optimized and improved method for reducing the installation height of a KR desulfurization system, which can reduce the installation height of the conventional KR desulfurization facility by about 8.5 meters, so that the KR stirring desulfurization facility with high efficiency and low cost is successfully installed in a plant less than 20 meters, and the popularization and application of a KR mechanical stirring desulfurization process are facilitated.
In order to achieve the purpose, the invention adopts the following technical scheme:
an optimized and improved method for reducing the installation height of a KR desulfurization system comprises the following steps:
1) optimizing a stirring system; a stirring frame is provided with 3 layers of frames, a lifting trolley buffer is arranged at the top of the 3 layers of frames, and a platform at the top of the stirring frame, corresponding to the lifting trolley, is provided with a hole for a stirring motor to pass through;
2) optimizing a feeding system; the stirring system platform is not provided with a storage bin which is arranged outside the stirring system platform; a material blowing tank is arranged at the bottom of the storage bin, and materials are conveyed into a weighing bin in the stirring system platform in a pneumatic feeding mode; a discharge hole at the bottom of the weighing bin feeds materials into the hot metal ladle in a gravity feeding mode through a feeding telescopic chute;
3) optimizing a paddle changing vehicle system; the diameter of the wheels of the paddle changing vehicle is reduced to 300mm, so that the height of the working surface of the paddle changing vehicle is reduced;
4) optimizing a spare storage bin system; moving the standby bin to the outer side of the stirring system platform, conveying the materials in the standby bin to the stirring system platform through a belt conveyor, and adding the materials into the molten iron tank through a discharging chute;
the installation height of the KR desulfurization system after optimization does not exceed 20 meters.
Compared with the prior art, the invention has the beneficial effects that:
can make the mounting height of current KR desulfurization facility reduce about 8.5 meters to successfully install high-efficient, low-cost KR stirring desulfurization facility in being less than 20 meters's factory building, be favorable to KR mechanical stirring method desulfurization process's popularization and application.
Drawings
FIG. 1 is a highly schematic comparison of an optimized mixing apparatus and an original mixing apparatus in an embodiment of the present invention.
FIG. 2 is a height comparison graph of an optimized feeding system and an original feeding system in an embodiment of the invention.
Fig. 3 is a height comparison diagram of the optimized paddle changing vehicle and the original paddle changing vehicle in the embodiment of the invention.
Figure 4 is a comparison of an optimized backup bin system and a virgin backup bin system in an embodiment of the present invention.
In the figure: 1. stirring frame 2, lifting trolley 3, stirring motor 4, lifting trolley buffer 5, stirring frame top platform 6.50 vertical storage bin 7, material blowing tank 8, weighing bin 9, automobile feeding pipeline 10, original paddle-changing vehicle wheels 11, optimized paddle-changing vehicle wheels 12, original paddle-changing vehicle working table 13, optimized paddle-changing vehicle working table 14, standby bin 15, vibrating feeder 16, belt conveyor 17, original standby bin 18, hot-metal ladle 19.10t crane 20.450t crane
Detailed Description
The following further describes embodiments of the present invention with reference to the accompanying drawings:
an optimized and improved method for reducing the installation height of a KR desulfurization system comprises the following steps:
1) optimizing a stirring system; the stirring frame 1 is provided with 3 layers of frames, the lifting trolley buffer 4 is arranged at the top of the 3 rd layer of frames, and a platform 5 at the top of the stirring frame, corresponding to the lifting trolley 2, is provided with a hole for the stirring motor 3 to pass through;
2) optimizing a feeding system; the stirring system platform is not provided with a storage bin which is arranged outside the stirring system platform; a material injection tank 7 is arranged at the bottom of the storage bin, and materials are conveyed into a weighing bin 8 in the stirring system platform in a pneumatic feeding mode; a discharge hole at the bottom of the weighing bin 8 feeds materials into the hot metal ladle 18 through a feeding telescopic chute in a gravity feeding mode;
3) optimizing a paddle changing vehicle system; the diameter of the wheels of the paddle changing vehicle is reduced to 300mm, so that the height of the working surface of the paddle changing vehicle is reduced;
4) optimizing a spare storage bin system; moving the standby bin to the outer side of the stirring system platform, conveying the materials in the standby bin to the stirring system platform through a belt conveyor 16, and adding the materials into a molten iron tank 18 through a discharging chute;
the installation height of the KR desulfurization system does not exceed 20 meters.
The following examples are carried out on the premise of the technical scheme of the invention, and detailed embodiments and specific operation processes are given, but the scope of the invention is not limited to the following examples. The methods used in the following examples are conventional methods unless otherwise specified.
[ examples ] A method for producing a compound
In this embodiment, the optimal design of the KR desulfurization system for reducing the installation height is divided into the following four aspects:
1. optimally designing a stirring system;
the lifting trolley 2 is arranged in the stirring frame 1, and the lifting trolley 2 is provided with a stirring motor 3 for driving a stirring paddle and a lifting trolley buffer device 4. As shown in the figure, the lifting trolley 2 in the original stirring system moves in four layers of frames, namely a layer of frame a, a layer of frame b, a layer of frame c and a layer of frame d in fig. 1. In the embodiment, the d-layer frame is eliminated, the lifting trolley buffer 4 is installed at the top of the c-layer frame, and the top platform 5 of the stirring frame is opened through a hole, so that the stirring motor 3 can penetrate through the hole, and the overall height of the stirring frame 1 is reduced by about 1720 mm.
2. Optimizing the design of a feeding system;
as shown in fig. 2, the stirring system platform is arranged outside the stirring frame 1, the 50 vertical storage bins 6 of the original feeding system are arranged at the top of the stirring system platform, and the feeding is carried out through the automobile feeding pipeline 9, so that the overall height of the KR process equipment is increased. In the embodiment, the 50 vertical storage bins 6 are moved out of the stirring system platform and are arranged on the ground outside the stirring system platform, and the materials are conveyed to the weighing bin 8 in the stirring system platform in a pneumatic feeding mode through the material injection tank 7 at the lower part of the 50 vertical storage bins 6. Then the materials are put into the hot metal ladle 18 through a feeding telescopic chute in a gravity feeding mode, so that the installation height of the system can be reduced by about 6700 mm.
3. Optimally designing a paddle changing vehicle;
as shown in fig. 3, the diameter of the original paddle change vehicle wheel 10 is 400mm, and the diameter of the optimized paddle change vehicle wheel 11 of the embodiment is 300 mm. The height of the working table top 12 of the original paddle changing vehicle is reduced from 500m to 400mm of the working table top 13 of the optimized paddle changing vehicle, and the platform height of the stirring system can be reduced by 100 mm.
4. Optimally designing a spare storage bin system;
as shown in FIG. 4, the KR desulfurization system cannot be installed in the workshop by a crane 20 of 450 t. In this embodiment move former reserve feed bin 17 from the factory building to the factory building and stride partially, (reserve feed bin 14 position in the picture), 10t crane 19 through the factory building stride partially realize feeding reserve feed bin 14, and the material in reserve feed bin 14 passes through vibrating feeder 15 and band conveyer 16 of lower part, send to the unloading chute in the KR desulfurization system mixing system platform, and then add in hot metal bottle 18.
After the above-mentioned optimal design, this embodiment KR desulfurization process system's mounting height has reduced about 8.5 meters for the construction can be implemented in the short factory building of old and low to high-efficient low-cost KR technology, is favorable to reducing the production running cost, improves steel manufacturing enterprise's economic benefits.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (1)
1. An optimized and improved method for reducing the installation height of a KR desulfurization system is characterized by comprising the following steps:
1) optimizing a stirring system; the number of layers of the stirring frame is reduced; a stirring frame is provided with 3 layers of frames, a lifting trolley buffer is arranged at the top of the 3 layers of frames, and a platform at the top of the stirring frame, corresponding to the lifting trolley, is provided with a hole for a stirring motor to pass through;
2) optimizing a feeding system; the stirring system platform is not provided with a storage bin which is arranged outside the stirring system platform; a material blowing tank is arranged at the bottom of the storage bin, and materials are conveyed into a weighing bin in the stirring system platform in a pneumatic feeding mode; a discharge hole at the bottom of the weighing bin feeds materials into the hot metal ladle in a gravity feeding mode through a feeding telescopic chute;
3) optimizing a paddle changing vehicle system; the diameter of the wheels of the paddle changing vehicle is reduced to 300mm, so that the height of the working surface of the paddle changing vehicle is reduced;
4) optimizing a spare storage bin system; moving the standby bin to the outer side of the stirring system platform, conveying the materials in the standby bin to the stirring system platform through a belt conveyor, and adding the materials into the molten iron tank through a discharging chute;
and the installation height of the optimized KR desulfurization system is not more than 20 meters.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010322213.1A CN111593170A (en) | 2020-04-22 | 2020-04-22 | Optimization improvement method for reducing installation height of KR desulfurization system |
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| CN202010322213.1A CN111593170A (en) | 2020-04-22 | 2020-04-22 | Optimization improvement method for reducing installation height of KR desulfurization system |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1740347A (en) * | 2004-08-27 | 2006-03-01 | 盛富春 | Integrated molten iron top treating unit for desulfuring and scumming |
| JP2007107102A (en) * | 2000-06-14 | 2007-04-26 | Jfe Steel Kk | Method for transportation of reproduced desulfurization agent |
| CN102061360A (en) * | 2010-12-17 | 2011-05-18 | 中冶南方工程技术有限公司 | Method for lowering installation height of Ruhstahl Hausen (RH) vacuum processing device under low rail surface elevation condition |
| CN106048141A (en) * | 2016-07-27 | 2016-10-26 | 中冶赛迪工程技术股份有限公司 | Method and device for decreasing total elevation of installation of RH device |
| CN106086311A (en) * | 2016-06-24 | 2016-11-09 | 中冶南方工程技术有限公司 | A kind of method reducing KR desulfurization processing means setting height(from bottom) |
| CN109516343A (en) * | 2019-01-08 | 2019-03-26 | 鞍钢集团工程技术有限公司 | A kind of KR technique stirring desulphurization lift cart anti-block device |
-
2020
- 2020-04-22 CN CN202010322213.1A patent/CN111593170A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007107102A (en) * | 2000-06-14 | 2007-04-26 | Jfe Steel Kk | Method for transportation of reproduced desulfurization agent |
| CN1740347A (en) * | 2004-08-27 | 2006-03-01 | 盛富春 | Integrated molten iron top treating unit for desulfuring and scumming |
| CN102061360A (en) * | 2010-12-17 | 2011-05-18 | 中冶南方工程技术有限公司 | Method for lowering installation height of Ruhstahl Hausen (RH) vacuum processing device under low rail surface elevation condition |
| CN106086311A (en) * | 2016-06-24 | 2016-11-09 | 中冶南方工程技术有限公司 | A kind of method reducing KR desulfurization processing means setting height(from bottom) |
| CN106048141A (en) * | 2016-07-27 | 2016-10-26 | 中冶赛迪工程技术股份有限公司 | Method and device for decreasing total elevation of installation of RH device |
| CN109516343A (en) * | 2019-01-08 | 2019-03-26 | 鞍钢集团工程技术有限公司 | A kind of KR technique stirring desulphurization lift cart anti-block device |
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Application publication date: 20200828 |