CN114178492A - Method for recycling waste materials in continuous casting tundish - Google Patents
Method for recycling waste materials in continuous casting tundish Download PDFInfo
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- CN114178492A CN114178492A CN202111515116.5A CN202111515116A CN114178492A CN 114178492 A CN114178492 A CN 114178492A CN 202111515116 A CN202111515116 A CN 202111515116A CN 114178492 A CN114178492 A CN 114178492A
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000002699 waste material Substances 0.000 title claims abstract description 17
- 238000009749 continuous casting Methods 0.000 title claims abstract description 14
- 238000004064 recycling Methods 0.000 title claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 65
- 239000010959 steel Substances 0.000 claims abstract description 65
- 238000005266 casting Methods 0.000 claims abstract description 46
- 239000000463 material Substances 0.000 claims abstract description 12
- 238000005520 cutting process Methods 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000002910 solid waste Substances 0.000 abstract description 2
- 238000005096 rolling process Methods 0.000 description 10
- 238000007599 discharging Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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Abstract
The invention relates to a method for recycling waste materials in a continuous casting tundish, belonging to the technical field of comprehensive utilization of solid wastes. Crushing the redundant steel by a crusher, and then putting the crushed redundant steel into a tundish filled with molten steel with the temperature of 1300-1700 ℃ to melt the redundant steel into the molten steel; the obtained molten steel flows into a water-cooled crystallizer, the molten steel is gradually condensed into a billet shell along the periphery of the molten steel in the crystallizer, when the thickness of the billet shell at an outlet at the lower end of the crystallizer is 8-12mm, a billet puller and a crystallizer vibration device are simultaneously started, a casting blank with a liquid core enters an arc-shaped guide section consisting of a plurality of clamping rollers, and the casting blank descends while being cooled for the second time and is continuously solidified to obtain the casting blank; and after the obtained casting blank is straightened and completely solidified, the casting blank is cut into a fixed-length casting blank by a cutting device, and finally the fixed-length casting blank is transported to a specified place by a knockout device. After the process, the original redundant materials can be re-melted and rebuilt, and unnecessary waste is saved.
Description
Technical Field
The invention relates to a method for recycling waste materials in a continuous casting tundish, belonging to the technical field of comprehensive utilization of solid wastes.
Background
At present, the prospect of the steel industry is more impressive than before, and under the condition that the market is not satisfactory, how to reduce the cost becomes an effective way for various large steel enterprises.
The deformed steel produced by a steel mill is sold according to theoretical weight, so that the stable high-negative-difference product has strong market competitiveness. The negative differential, i.e., the difference between the actual weight and the theoretical weight, divided by the theoretical weight, times 100%. Taking the thread 12 as an example, about 230 pieces of 12m of specified-length deformed steel bar can be produced under the condition that the blank weighs 2450kg without producing according to the negative difference. If the production is carried out according to the negative difference, about 237 to 240 can be produced. 7-10 produced products are the selling points of the products.
As the screw thread steel is sold and delivered with theoretical weight, the stability rate of negative rate products directly influences the reputation and the benefit of companies. Therefore, a rolling mill is matched with relevant departments of a company, and the negative difference rate obtains good effect. The product is deeply favored by customers, the reputation of the company product is improved, and the market competitiveness and the efficiency creating capability are enhanced.
However, the use of a negative tolerance rolling process results in excess material being cut off beyond a specified length and less than the length, which may be unnecessarily wasted. The problem of waste due to unqualified and redundant materials after steel production in the increasing steel mills with negative tolerances. The problem is analyzed as a direction to reduce the cost, that is, the material to be discarded is returned to the furnace for remanufacturing.
Disclosure of Invention
In view of the problems and deficiencies of the prior art, the invention provides a method for recycling waste materials in a continuous casting tundish. The invention can effectively solve the waste caused by the redundant material in the negative tolerance rolling process, for example, the rod wire produced according to a specific length needs to cut off the part exceeding the specific length because of exceeding the specific length, but the cut-off part of the material is discarded because of not reaching the specific length. The method for recycling the waste materials in the continuous casting tundish realizes that the redundant materials can be re-manufactured in a melting furnace, and avoids unnecessary waste caused by incomplete wire rods. The invention is realized by the following technical scheme.
A method for putting waste materials into a continuous casting tundish for recycling comprises the following steps:
(1) crushing the redundant steel to 10-50mm by a crusher, and then putting the crushed redundant steel into a tundish filled with molten steel at the temperature of 1300-1700 ℃ to melt the redundant steel into the molten steel;
(2) the molten steel obtained in the step (1) flows into a water-cooled crystallizer, the molten steel is gradually condensed into a billet shell along the periphery of the molten steel in the crystallizer, when the thickness of the billet shell at an outlet at the lower end of the crystallizer is 8-12mm, a billet puller and a crystallizer vibration device are simultaneously started, a casting blank with a liquid core enters an arc-shaped guide section consisting of a plurality of clamping rollers, and the casting blank descends while being secondarily cooled and continues to be solidified to obtain the casting blank;
(3) and (3) after the dummy bar is discharged from the drawing straightener, separating the dummy bar from the casting blank, straightening and completely solidifying the casting blank obtained in the step (2), cutting the casting blank into a fixed-length casting blank by a cutting device, and finally transporting the fixed-length casting blank to a specified place by a discharging device.
The water-cooled crystallizer vibration device in the step (2) is driven by hydraulic pressure, and the length of the crystallizer is 850 and 950 mm.
The amplitude of the crystallizer vibration device in the step (2) is 5-11mm +/-10 mm, and the vibration frequency range is at least 50 times/minute and at most 360 times/minute.
And (3) in the step (2), the secondary cooling is carried out by atomizing water by using 10-12 nozzles, the first direction is determined by the direction of the first nozzle, the angles between every two other nozzles are 30-90 degrees, and the atomizing water flow of each nozzle is 120 mL/min.
The invention has the beneficial effects that:
the method avoids the waste caused by that the redundant material cut off in the negative tolerance rolling process is not a complete product, and the redundant material originally obtained by the process can be re-melted and reconstructed, thereby saving unnecessary waste.
Drawings
FIG. 1 is a process flow diagram of the present invention;
FIG. 2 is a schematic flow diagram of a process apparatus of the present invention.
Detailed Description
The invention is further described with reference to the following drawings and detailed description.
Example 1
As shown in fig. 1 and 2, the method for reusing waste materials in a continuous casting tundish includes the steps of:
(1) crushing 80 tons of redundant steel (1000 tons of redundant steel bars with the diameter of 6-12 mm after a batch of steel bars are subjected to a negative tolerance rolling process) to 50mm by using a crusher, and then putting the crushed steel into a tundish filled with molten steel with the temperature of 1300 ℃ to melt the redundant steel into the molten steel;
(2) the molten steel obtained in the step (1) flows into a water-cooled crystallizer (a vibration device of the water-cooled crystallizer is in a hydraulic driving mode, the length of the crystallizer is 850 mm), the molten steel is gradually condensed into a blank shell along the periphery of the molten steel in the crystallizer, when the thickness of the blank shell at an outlet at the lower end of the crystallizer is 8mm, a blank drawing machine and a vibration device of the crystallizer (the amplitude is 5mm +/-10 mm, the vibration frequency range is 50 times/minute at the minimum and 360 times/minute at the maximum) are simultaneously started, a casting blank with a liquid core enters an arc guide section (an arc guide section consisting of 8 pairs of clamping rollers, the pressure of each clamping roller is 600 kN), the casting blank descends while being subjected to secondary cooling (the secondary cooling is carried out by spraying water by adopting 10 nozzles, the angle between a first nozzle and the horizontal ground is 90 degrees, the angle between the other two nozzles is 30 degrees, and the spraying water flow of each nozzle is 100 mL/min.), continuously solidifying to obtain a casting blank;
(3) and (3) after the dummy bar is discharged from the drawing straightener, separating the dummy bar from the casting blank, straightening and completely solidifying the casting blank obtained in the step (2), cutting the casting blank into a fixed-length casting blank by a cutting device, and finally transporting the fixed-length casting blank to a specified place by a discharging device.
By adopting the method, the loss rate of the steel after the negative tolerance rolling process is reduced to 2%.
Example 2
As shown in fig. 1 and 2, the method for reusing waste materials in a continuous casting tundish includes the steps of:
(1) crushing 120 tons of redundant steel (1000 tons of redundant steel bars with the diameter of 6-12 mm after a batch of steel bars are subjected to a negative tolerance rolling process) to 10mm by using a crusher, and then putting the crushed steel into a tundish filled with molten steel with the temperature of 1600 ℃ to melt the redundant steel into the molten steel;
(2) the molten steel obtained in the step (1) flows into a water-cooled crystallizer (a vibration device of the water-cooled crystallizer is in a hydraulic driving mode, the length of the crystallizer is 900 mm), the molten steel is gradually condensed into a blank shell along the periphery of the molten steel in the crystallizer, when the thickness of the blank shell at an outlet at the lower end of the crystallizer is 10mm, a blank drawing machine and a vibration device of the crystallizer (the amplitude is 8mm +/-10 mm, the vibration frequency range is 50 times/minute at the minimum and 360 times/minute at the maximum) are simultaneously started, a casting blank with a liquid core enters an arc guide section (an arc guide section consisting of 8 pairs of clamping rollers, the pressure of each clamping roller is 600 kN), the casting blank descends while being subjected to secondary cooling (the secondary cooling is atomized water cooling by adopting 11 nozzles, the angle between a first nozzle and the horizontal ground is 90 degrees, the angle between the other two nozzles is 60 degrees, the atomized water flow of each nozzle is 110 mL/min.), continuously solidifying to obtain a casting blank;
(3) and (3) after the dummy bar is discharged from the drawing straightener, separating the dummy bar from the casting blank, straightening and completely solidifying the casting blank obtained in the step (2), cutting the casting blank into a fixed-length casting blank by a cutting device, and finally transporting the fixed-length casting blank to a specified place by a discharging device.
By adopting the method, the loss rate of the steel after the negative tolerance rolling process is reduced to 1%.
Example 3
As shown in fig. 1 and 2, the method for reusing waste materials in a continuous casting tundish includes the steps of:
(1) crushing 100 tons of redundant steel (1000 tons of redundant steel bars with the diameter of 6-12 mm after a batch of steel bars are subjected to a negative tolerance rolling process) to 30mm by using a crusher, and then putting the crushed steel into a tundish filled with molten steel with the temperature of 1700 ℃ to melt the redundant steel into the molten steel;
(2) the molten steel obtained in the step (1) flows into a water-cooled crystallizer (a vibration device of the water-cooled crystallizer is in a hydraulic driving mode, the length of the crystallizer is 950 mm), the molten steel is gradually condensed into a blank shell along the periphery of the molten steel in the crystallizer, when the thickness of the blank shell at an outlet at the lower end of the crystallizer is 12mm, a blank drawing machine and a vibration device of the crystallizer (the amplitude is 11mm +/-10 mm, the vibration frequency range is 50 times/minute at the minimum and 360 times/minute at the maximum) are simultaneously started, a casting blank with a liquid core enters an arc guide section (an arc guide section consisting of 8 pairs of clamping rollers, the pressure of each clamping roller is 600 kN), the casting blank descends while being subjected to secondary cooling (the secondary cooling is atomized water cooling by adopting 12 nozzles, the angle between a first nozzle and the horizontal ground is 90 degrees, the angle between the other two nozzles is 90 degrees, and the atomized water flow of each nozzle is 120 mL/min.), continuously solidifying to obtain a casting blank;
(3) and (3) after the dummy bar is discharged from the drawing straightener, separating the dummy bar from the casting blank, straightening and completely solidifying the casting blank obtained in the step (2), cutting the casting blank into a fixed-length casting blank by a cutting device, and finally transporting the fixed-length casting blank to a specified place by a discharging device.
By adopting the method, the loss rate of the steel after the negative tolerance rolling process is reduced to 1.5%.
While the present invention has been described in detail with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, and various changes can be made without departing from the spirit and scope of the present invention.
Claims (4)
1. A method for putting waste materials into a continuous casting tundish for recycling is characterized by comprising the following steps:
(1) crushing the redundant steel to 10-50mm by a crusher, and then putting the crushed redundant steel into a tundish filled with molten steel at the temperature of 1300-1700 ℃ to melt the redundant steel into the molten steel;
(2) the molten steel obtained in the step (1) flows into a water-cooled crystallizer, the molten steel is gradually condensed into a billet shell along the periphery of the molten steel in the crystallizer, when the thickness of the billet shell at an outlet at the lower end of the crystallizer is 8-12mm, a billet puller and a crystallizer vibration device are simultaneously started, a casting blank with a liquid core enters an arc-shaped guide section consisting of a plurality of clamping rollers, and the casting blank descends while being secondarily cooled and continues to be solidified to obtain the casting blank;
(3) and (3) straightening and completely solidifying the casting blank obtained in the step (2), cutting the casting blank into a fixed-length casting blank by a cutting device, and finally transporting the fixed-length casting blank to a specified place by a knockout device.
2. The method of recycling scrap material in a continuous casting tundish as claimed in claim 1, wherein: the water-cooled crystallizer vibration device in the step (2) is driven by hydraulic pressure, and the length of the crystallizer is 850 and 950 mm.
3. The method of recycling scrap material in a continuous casting tundish as claimed in claim 1, wherein: the amplitude of the crystallizer vibration device in the step (2) is 5-11mm +/-10 mm, and the vibration frequency range is at least 50 times/minute and at most 360 times/minute.
4. The method of recycling scrap material in a continuous casting tundish as claimed in claim 1, wherein: and (3) in the step (2), the secondary cooling is carried out by atomizing water by using 10-12 nozzles, the first direction is determined by the direction of the first nozzle, the angles between every two other nozzles are 30-90 degrees, and the atomizing water flow of each nozzle is 120 mL/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111515116.5A CN114178492A (en) | 2021-12-13 | 2021-12-13 | Method for recycling waste materials in continuous casting tundish |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111515116.5A CN114178492A (en) | 2021-12-13 | 2021-12-13 | Method for recycling waste materials in continuous casting tundish |
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Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1242351A (en) * | 1969-03-14 | 1971-08-11 | Leybold Heraeus Verwaltung | Process and apparatus for purifying metals by submerged arc casting |
| CN85106418A (en) * | 1984-11-03 | 1986-05-10 | 曼内斯曼股份公司 | The band continuous casting process and the equipment thereof of metal, especially steel |
| JP2000225458A (en) * | 1999-02-03 | 2000-08-15 | Komatsu Ltd | Method for reusing rejected slab material, and holding member and balancer by this method |
| CN101189079A (en) * | 2005-03-02 | 2008-05-28 | 丹尼利&C.欧分西尼公司 | Compact plant for continuous production of bars and/or profiles |
| CN102439387A (en) * | 2009-03-18 | 2012-05-02 | 拉斐克·布洛斯·道 | Steel production facility |
| KR20160044276A (en) * | 2014-10-15 | 2016-04-25 | 주식회사 포스코 | Semi-continuous casting method of vettical type |
| CN105531043A (en) * | 2013-09-30 | 2016-04-27 | 日立金属株式会社 | Process for manufacturing reclaimed alloy material and process for manufacturing reclaimed amorphous alloy ribbon |
| CN105861786A (en) * | 2016-06-02 | 2016-08-17 | 高原 | Method for preparing bearing material from scrap iron |
| CN106148707A (en) * | 2016-07-31 | 2016-11-23 | 吴雪梅 | A kind of Full-automatic aluminum alloyed scrap reclaims forming machine |
| DE102015121046A1 (en) * | 2015-11-06 | 2017-05-11 | Sms Group Gmbh | Process and apparatus for recycling press scrap |
| CN109226712A (en) * | 2018-11-05 | 2019-01-18 | 佛山市南海镕信金属制品有限公司 | A kind of die casting machine clout waste material recovery device and treatment process |
| CN111051545A (en) * | 2017-03-23 | 2020-04-21 | 诺维尔里斯公司 | Casting recycled aluminum scrap |
| CN112322994A (en) * | 2020-11-04 | 2021-02-05 | 南阳汉冶特钢有限公司 | Method for producing low-cost Q355B medium plate through medium plate alloy leftover material |
-
2021
- 2021-12-13 CN CN202111515116.5A patent/CN114178492A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1242351A (en) * | 1969-03-14 | 1971-08-11 | Leybold Heraeus Verwaltung | Process and apparatus for purifying metals by submerged arc casting |
| CN85106418A (en) * | 1984-11-03 | 1986-05-10 | 曼内斯曼股份公司 | The band continuous casting process and the equipment thereof of metal, especially steel |
| JP2000225458A (en) * | 1999-02-03 | 2000-08-15 | Komatsu Ltd | Method for reusing rejected slab material, and holding member and balancer by this method |
| CN101189079A (en) * | 2005-03-02 | 2008-05-28 | 丹尼利&C.欧分西尼公司 | Compact plant for continuous production of bars and/or profiles |
| CN102439387A (en) * | 2009-03-18 | 2012-05-02 | 拉斐克·布洛斯·道 | Steel production facility |
| CN105531043A (en) * | 2013-09-30 | 2016-04-27 | 日立金属株式会社 | Process for manufacturing reclaimed alloy material and process for manufacturing reclaimed amorphous alloy ribbon |
| KR20160044276A (en) * | 2014-10-15 | 2016-04-25 | 주식회사 포스코 | Semi-continuous casting method of vettical type |
| DE102015121046A1 (en) * | 2015-11-06 | 2017-05-11 | Sms Group Gmbh | Process and apparatus for recycling press scrap |
| CN105861786A (en) * | 2016-06-02 | 2016-08-17 | 高原 | Method for preparing bearing material from scrap iron |
| CN106148707A (en) * | 2016-07-31 | 2016-11-23 | 吴雪梅 | A kind of Full-automatic aluminum alloyed scrap reclaims forming machine |
| CN111051545A (en) * | 2017-03-23 | 2020-04-21 | 诺维尔里斯公司 | Casting recycled aluminum scrap |
| CN109226712A (en) * | 2018-11-05 | 2019-01-18 | 佛山市南海镕信金属制品有限公司 | A kind of die casting machine clout waste material recovery device and treatment process |
| CN112322994A (en) * | 2020-11-04 | 2021-02-05 | 南阳汉冶特钢有限公司 | Method for producing low-cost Q355B medium plate through medium plate alloy leftover material |
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