TWI510636B - An open sand for steelmaking electric arc furnace - Google Patents
An open sand for steelmaking electric arc furnace Download PDFInfo
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- TWI510636B TWI510636B TW101134934A TW101134934A TWI510636B TW I510636 B TWI510636 B TW I510636B TW 101134934 A TW101134934 A TW 101134934A TW 101134934 A TW101134934 A TW 101134934A TW I510636 B TWI510636 B TW I510636B
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- electric arc
- arc furnace
- serpentine
- particle size
- open sand
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Vertical, Hearth, Or Arc Furnaces (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Description
本發明是有關於一種填充開口砂，特別是指一種煉鋼電弧爐用開口砂。The invention relates to a filled open sand, in particular to an open sand for a steelmaking electric arc furnace.
以電弧爐煉鋼時，電弧爐出鋼是以口蓋系統控制而必須在出鋼口中填充開口砂，以避免鋼液滲入口蓋系統而凝固，導致無法開啟或關閉、影響出鋼。When electric arc furnace steelmaking, the arc furnace tapping is controlled by the mouth cover system, and the open sand must be filled in the tapping port to prevent the molten steel from infiltrating the inlet cover system and solidify, which makes it impossible to open or close and affect the tapping.
目前，煉鋼電弧爐用開口砂是不同粒度級配的橄欖石，而橄欖石是一種台灣沒有蘊藏的礦物，所以煉鋼業者必須花費較高的成本自國外進口使用。At present, the open sand for steelmaking electric arc furnaces is olivine with different particle size grades, and olivine is a mineral that is not contained in Taiwan, so steelmakers must use high cost to import from abroad.
蛇紋石是台灣東部自有的蘊藏礦物，目前多是用於建築石材，因而自採礦、乃至切割的過程中會產生大量的下腳料及汙泥未能有效運用，而浪費了珍貴的礦產資源。根據發明人細心研究後得知，不同粒度級配搭配的蛇紋石，可以作為煉鋼電弧爐用開口砂而避免鋼液滲入口蓋系統，如此不但可以大幅提升其經濟價值，同時也能充分有效利用台灣自有的礦石蘊藏，更可以大幅降低外購進口橄欖石的物料成本。Serpentine is a mineral contained in eastern Taiwan. At present, it is mostly used for building stone. Therefore, a large amount of waste and sludge are not effectively used in the process of mining and even cutting, and precious mineral resources are wasted. According to the intensive research by the inventors, it is known that serpentine with different particle size grades can be used as open sand for steelmaking electric arc furnace to avoid the infiltration of the molten steel inlet cover system, so that not only can it greatly enhance its economic value, but also fully utilize it effectively. Taiwan's own ore reserves can significantly reduce the material cost of purchased olivine.
因此，本發明之目的，即在提供一種以台灣東部自有的蛇紋石配合不同粒度級配的煉鋼電弧爐用開口砂。Accordingly, it is an object of the present invention to provide an open sand for a steelmaking electric arc furnace having a serpentine graded in eastern Taiwan in combination with different particle size grades.
於是，本發明一種煉鋼電弧爐用開口砂包含粒度8mm~5mm的蛇紋石、粒度5mm~3mm的蛇紋石，和粒度小於3mm的蛇紋石。Therefore, the open sand for a steelmaking electric arc furnace of the present invention comprises serpentine having a particle size of 8 mm to 5 mm, serpentine having a particle size of 5 mm to 3 mm, and serpentine having a particle size of less than 3 mm.
較佳地，本發明的煉鋼電弧爐用開口砂，其粒度8mm~5mm的蛇紋石占該煉鋼電弧爐用開口砂整體的20%，粒度5mm~3mm的蛇紋石占該煉鋼電弧爐用開口砂整體的35%，粒度小於3mm的蛇紋石占該煉鋼電弧爐用開口砂整體的45%，且每一粒度級配的蛇紋石占該煉鋼電弧爐用開口砂整體的比例的誤差是±10%。Preferably, the open sand for the steelmaking electric arc furnace of the present invention has a serpentine having a particle size of 8 mm to 5 mm, which accounts for 20% of the entire open sand for the steelmaking electric arc furnace, and the serpentine having a particle size of 5 mm to 3 mm accounts for the electric arc furnace. 35% of the whole of the open sand, the serpentine with a particle size of less than 3mm accounts for 45% of the total open sand for the steelmaking electric arc furnace, and the serpentite of each particle size grading accounts for the proportion of the open sand for the steelmaking electric arc furnace. The error is ±10%.
較佳地，本發明的煉鋼電弧爐用開口砂，其所有粒度級配的蛇紋石的化學組成具有8%的三氧化二鐵(Fe2 O3 )、40%的二氧化矽(SiO2 )、35%的氧化鎂(MgO)，及其他的化合物，且每一化學組成範圍的誤差是±5%。Preferably, the open sand for the steelmaking electric arc furnace of the present invention has a chemical composition of all size fractions of serpentine having 8% of ferric oxide (Fe 2 O 3 ) and 40% of ceria (SiO 2 ). ), 35% magnesium oxide (MgO), and other compounds, and the error per chemical composition range is ± 5%.
本發明之功效在於：提供一種新的、以台灣自有蘊藏的蛇紋石構成的煉鋼電弧爐用開口砂，進而充分利用有限的礦產資源，並降低物料支出成本。The invention has the effect of providing a new open sand for steelmaking electric arc furnace composed of serpentine which is possessed by Taiwan, thereby fully utilizing limited mineral resources and reducing material expenditure cost.
有關本發明之前述及其他技術內容、特點與功效，在以下配合參考圖式之一個較佳實施例的詳細說明中，將可清楚的呈現。The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments.
本發明一種煉鋼電弧爐用開口砂的一較佳實施例，包含粒度8mm~5mm的蛇紋石、粒度5mm~3mm的蛇紋石，和粒度小於3mm的蛇紋石，其中，粒度8mm~5mm的蛇紋石占該煉鋼電弧爐用開口砂整體的20%，粒度5mm~3mm的蛇紋石占該煉鋼電弧爐用開口砂整體的35%，粒度小於3mm的蛇紋石占該煉鋼電弧爐用開口砂整體的45%，且每一粒度級配的蛇紋石占該煉鋼電弧爐用開口砂整體的比例的誤差是±10%，並且， 所有粒度級配的蛇紋石的化學組成具有8%的三氧化二鐵、40%的二氧化矽、35%的氧化鎂，及其他的微量化合物，且每一化學組成範圍的誤差是±5%。A preferred embodiment of the open sand for steelmaking electric arc furnace according to the present invention comprises serpentine having a particle size of 8 mm to 5 mm, serpentine having a particle size of 5 mm to 3 mm, and serpentine having a particle size of less than 3 mm, wherein the serpentine having a particle size of 8 mm to 5 mm The stone accounts for 20% of the whole open sand for the steelmaking electric arc furnace, and the serpentine with a particle size of 5mm~3mm accounts for 35% of the whole open sand for the steelmaking electric arc furnace, and the serpentine with a particle size of less than 3mm accounts for the opening of the steelmaking electric arc furnace. 45% of the total sand, and the serpentine of each particle size grading accounts for ±10% of the total proportion of the open sand for the steelmaking electric arc furnace, and The chemical composition of all particle size grading serpentine has 8% ferric oxide, 40% cerium oxide, 35% magnesium oxide, and other trace compounds, and the error of each chemical composition range is ± 5%. .
以下用粒度級配屬本發明煉鋼電弧爐用開口砂粒度級配區間的一個實驗例，以及粒度級配超出本發明煉鋼電弧爐用開口砂粒度級配區間的一個比較例，並配合現有的以橄欖石構成的開口砂，驗證本發明煉鋼電弧爐用開口砂。The following is an experimental example of the granularity grading interval of the open sand for the steelmaking electric arc furnace of the present invention, and a comparative example of the particle size grading exceeding the granularity grading interval of the open sand for the steelmaking electric arc furnace of the present invention, and cooperates with the existing The open sand composed of olivine was used to verify the open sand for the steelmaking electric arc furnace of the present invention.
由上述表列的試驗結果可知，實驗例的流動性較比較例優，堆積密度也較緻密，此外，高溫軟化點、熔融點、流動點均小於煉鋼溫度1500℃，而可在使用時形成熱面為軟化層、軟化層之下為燒結層、燒結層之下為非燒結層的較佳結構，而在出鋼口蓋打開時，非燒結層首先落下而使燒結層失去支撐，進而被鋼液靜壓力壓破而形成自然開口以利出鋼，並防止鋼液滲入口蓋系統，且以3噸的實驗例粒度配比的煉鋼電弧爐用開口砂實際投入電弧爐廠試用，得到全部自然開口、自然開口率100%的結果。It can be seen from the test results listed above that the fluidity of the experimental examples is superior to that of the comparative examples, and the bulk density is also dense. In addition, the high temperature softening point, the melting point, and the flow point are both smaller than the steelmaking temperature of 1500 ° C, and can be formed at the time of use. The hot surface is a softened layer, the sintered layer is a sintered layer, and the sintered layer is a non-sintered layer. When the tapping cap is opened, the non-sintered layer first falls and the sintered layer loses support, and is then steel. The hydrostatic pressure is crushed to form a natural opening to facilitate the steel, and the molten steel is prevented from infiltrating the inlet cover system, and the open sand for the steelmaking electric arc furnace with a particle size ratio of 3 tons is actually put into the electric arc furnace factory for trial use, and all the natural The result of opening and natural opening ratio of 100%.
綜上所述，本發明是提出一種以台灣自有蘊藏並具有預定粒度配比的蛇紋石構成的煉鋼電弧爐用開口砂，進而可以充分利用有限的礦產資源，並降低物料支出成本，確實能達成本發明之目的。In summary, the present invention proposes an open sand for a steelmaking electric arc furnace which is composed of serpentine which is possessed by Taiwan and has a predetermined particle size ratio, thereby making full use of limited mineral resources and reducing the cost of material expenditure. The object of the invention can be achieved.
惟以上所述者，僅為本發明之較佳實施例而已，當不能以此限定本發明實施之範圍，即大凡依本發明申請專利範圍及發明說明內容所作之簡單的等效變化與修飾，皆仍屬本發明專利涵蓋之範圍內。The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent.
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| Application Number | Priority Date | Filing Date | Title |
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| TW101134934A TWI510636B (en) | 2012-09-24 | 2012-09-24 | An open sand for steelmaking electric arc furnace |
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| TW101134934A TWI510636B (en) | 2012-09-24 | 2012-09-24 | An open sand for steelmaking electric arc furnace |
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| TW201412996A TW201412996A (en) | 2014-04-01 |
| TWI510636B true TWI510636B (en) | 2015-12-01 |
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| TW101134934A TWI510636B (en) | 2012-09-24 | 2012-09-24 | An open sand for steelmaking electric arc furnace |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW230224B (en) * | 1992-01-09 | 1994-09-11 | Virgin Metals Canada Ltd | |
| CN101535459A (en) * | 2006-10-09 | 2009-09-16 | 化学制造布敦海姆两合公司 | Graphite-containing high-temperature lubricant for high-grade steels and carbon steels |
| CN102002549A (en) * | 2010-12-04 | 2011-04-06 | 山西太钢不锈钢股份有限公司 | Dry deslagging method of soaking pit |
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2012
- 2012-09-24 TW TW101134934A patent/TWI510636B/en not_active IP Right Cessation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW230224B (en) * | 1992-01-09 | 1994-09-11 | Virgin Metals Canada Ltd | |
| CN101535459A (en) * | 2006-10-09 | 2009-09-16 | 化学制造布敦海姆两合公司 | Graphite-containing high-temperature lubricant for high-grade steels and carbon steels |
| CN102002549A (en) * | 2010-12-04 | 2011-04-06 | 山西太钢不锈钢股份有限公司 | Dry deslagging method of soaking pit |
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| TW201412996A (en) | 2014-04-01 |
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