TWI820759B - Liquid steel desulfurization method - Google Patents
Liquid steel desulfurization method Download PDFInfo
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- TWI820759B TWI820759B TW111122790A TW111122790A TWI820759B TW I820759 B TWI820759 B TW I820759B TW 111122790 A TW111122790 A TW 111122790A TW 111122790 A TW111122790 A TW 111122790A TW I820759 B TWI820759 B TW I820759B
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- molten steel
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 90
- 239000010959 steel Substances 0.000 title claims abstract description 90
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 55
- 230000023556 desulfurization Effects 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000007788 liquid Substances 0.000 title description 7
- 239000002893 slag Substances 0.000 claims abstract description 71
- 238000007670 refining Methods 0.000 claims abstract description 54
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 24
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000000292 calcium oxide Substances 0.000 claims abstract description 24
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 17
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 17
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims abstract description 16
- 229910001634 calcium fluoride Inorganic materials 0.000 claims abstract description 16
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 12
- 238000007599 discharging Methods 0.000 claims abstract description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 3
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 claims 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 27
- 239000011593 sulfur Substances 0.000 description 27
- 229910052717 sulfur Inorganic materials 0.000 description 27
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 14
- 239000011574 phosphorus Substances 0.000 description 14
- 229910052698 phosphorus Inorganic materials 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 7
- 238000010891 electric arc Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- VZSRBBMJRBPUNF-UHFFFAOYSA-N 2-(2,3-dihydro-1H-inden-2-ylamino)-N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]pyrimidine-5-carboxamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C(=O)NCCC(N1CC2=C(CC1)NN=N2)=O VZSRBBMJRBPUNF-UHFFFAOYSA-N 0.000 description 1
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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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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- Treatment Of Steel In Its Molten State (AREA)
Abstract
一種鋼液脫硫方法，包含使第一脫硫劑與第一鋼液在預設溫度的第一熔爐中進行第一脫硫處理，然後，自第一熔爐中排出熱的第一精煉渣及熱的第一脫硫鋼液；使第二鋼液與部分熱的第一精煉渣在預設溫度的第二熔爐中接觸，接著，加入第二脫硫劑，進行第二脫硫處理，然後，自第二熔爐中排出第二精煉渣及第二脫硫鋼液。第二脫硫劑包含鋁渣、氧化鈣及氟化鈣。本發明鋼液脫硫方法具有將第一精煉渣及鋁渣被再利用而賦予新價值的優點，同時，透過直接將熱的第一精煉渣用於第二次脫硫處理，本發明鋼液脫硫方法具有能夠減少整體渣排放量而具有環保的優點。A method for desulfurizing molten steel, including performing a first desulfurization treatment on a first desulfurizer and a first molten steel in a first furnace at a preset temperature, and then discharging hot first refining slag from the first furnace and The hot first desulfurized molten steel; the second molten steel is brought into contact with the partially heated first refining slag in the second furnace at a preset temperature, and then the second desulfurizer is added to perform the second desulfurization treatment, and then , discharge the second refining slag and the second desulfurized molten steel from the second furnace. The second desulfurizer includes aluminum slag, calcium oxide and calcium fluoride. The molten steel desulfurization method of the present invention has the advantage of reusing the first refining slag and aluminum slag to give new value. At the same time, by directly using the hot first refining slag for the second desulfurization treatment, the molten steel of the present invention The desulfurization method has the advantage of reducing overall slag emissions and being environmentally friendly.
Description
本發明是有關於一種純化方法，特別是指一種鋼液脫硫方法。The present invention relates to a purification method, in particular to a method for desulfurizing molten steel.
由於鋼鐵的用途日益廣泛，致使對鋼鐵性能的要求也日漸提高，而要使鋼鐵性能提升的關鍵技術之一是使鋼液的純淨度提升，尤其是降低該鋼液中的硫含量，因此，如何降低鋼液中的硫含量為廣泛被研究的議題。一般來說，降低鋼液中的硫含量的方法大多是利用脫硫劑來進行。As the uses of steel become more and more widespread, the requirements for the performance of steel are also increasing day by day. One of the key technologies to improve the performance of steel is to improve the purity of molten steel, especially to reduce the sulfur content in the molten steel. Therefore, How to reduce the sulfur content in molten steel is a widely studied topic. Generally speaking, most methods to reduce the sulfur content in molten steel are by using desulfurizers.
一般而言，鋼液脫硫的方法包含使脫硫劑(包含氧化鈣及氟化鈣)對不同批次的鋼液在預設溫度的熔爐中進行脫硫處理，然後，自該熔爐中排出精煉渣及脫硫鋼液。由於鋼材被廣泛地應用在各領域中，因此，在該鋼液脫硫的方法中，就會不斷地有精煉渣產出，致使日積月累下聚集了龐大數量的精煉渣。Generally speaking, the method of desulfurizing molten steel includes using desulfurizers (including calcium oxide and calcium fluoride) to desulfurize different batches of molten steel in a furnace at a preset temperature, and then discharge it from the furnace Refining slag and desulfurized molten steel. Since steel is widely used in various fields, in the method of desulfurizing molten steel, refining slag will continue to be produced, resulting in the accumulation of a huge amount of refining slag over time.
然而，經研究發現，該精煉渣遇水會產生膨脹現象，因此，能夠再利用的領域有限，而為解決該膨脹現象，以利提升該精煉渣的再利用的領域，一般會對該精煉渣進行安定化處理，但安定化處理需耗費的時間較長，致使無法快速地消耗不斷地大量產出的精煉渣，而使得該精煉渣大多堆置於廠房內，長久下來，造成業者的存放負擔。因此，如何減少精煉渣的產出量是目前業界亟需克服的困難。However, research has found that the refining slag will expand when exposed to water. Therefore, the areas that can be reused are limited. In order to solve the expansion phenomenon and improve the reuse areas of the refining slag, the refining slag is generally reused. Stabilization treatment is carried out, but the stabilization treatment takes a long time, which makes it impossible to quickly consume the refining slag that is continuously produced in large quantities, so that most of the refining slag is piled in the factory. In the long run, it creates a storage burden for the industry. . Therefore, how to reduce the output of refining slag is an urgent difficulty that the industry needs to overcome.
因此，本發明的目的，即在提供一種鋼液脫硫方法。Therefore, the object of the present invention is to provide a method for desulfurizing molten steel.
於是，本發明鋼液脫硫方法，包含： 使第一脫硫劑與第一鋼液在預設溫度的第一熔爐中進行第一脫硫處理，然後，自該第一熔爐中排出熱的第一精煉渣及熱的第一脫硫鋼液； 使第二鋼液與至少部分的該熱的第一精煉渣在預設溫度的第二熔爐中接觸，接著，加入第二脫硫劑，進行第二脫硫處理，然後，自該第二熔爐中排出第二精煉渣及第二脫硫鋼液，其中，該第二脫硫劑包含鋁渣、氧化鈣及氟化鈣。 Therefore, the molten steel desulfurization method of the present invention includes: The first desulfurizer and the first molten steel are subjected to the first desulfurization treatment in the first furnace at a preset temperature, and then the hot first refining slag and the hot first desulfurized steel are discharged from the first furnace liquid; The second molten steel is contacted with at least part of the hot first refining slag in a second furnace at a preset temperature, and then a second desulfurizer is added to perform a second desulfurization treatment, and then, from the second furnace The second refining slag and the second desulfurized molten steel are discharged from the second desulfurizing agent, wherein the second desulfurizing agent includes aluminum slag, calcium oxide and calcium fluoride.
本發明的功效在於：在本發明鋼液脫硫方法中，該第一精煉渣及鋁渣能夠被再利用而賦予新價值，同時，相較於僅利用包含氧化鈣及氟化鈣的新鮮脫硫劑對第一鋼液及第二鋼液進行脫硫處理的鋼液脫硫方法整體所產生的渣量，本發明鋼液脫硫方法透過直接將該熱的第一精煉渣用於第二次脫硫處理，而具有能夠減少整體的渣量而具有環保的優點。The effect of the present invention is that in the molten steel desulfurization method of the present invention, the first refining slag and aluminum slag can be reused and given new value. At the same time, compared with only using fresh desulfurization containing calcium oxide and calcium fluoride, The amount of slag produced by the entire molten steel desulfurization method in which the first molten steel and the second molten steel are desulfurized by the sulfur agent. The molten steel desulfurization method of the present invention directly uses the hot first refining slag for the second molten steel. Secondary desulfurization treatment has the advantage of reducing the overall slag amount and being environmentally friendly.
本發明鋼液脫硫方法包含使第一脫硫劑與第一鋼液在預設溫度的第一熔爐中進行第一脫硫處理，然後，自該第一熔爐中排出熱的第一精煉渣及熱的第一脫硫鋼液；使第二鋼液與至少部分的該熱的第一精煉渣在預設溫度的第二熔爐中接觸，接著，加入第二脫硫劑，進行第二脫硫處理，然後，自該第二熔爐中排出第二精煉渣及第二脫硫鋼液，其中，該第二脫硫劑包含鋁渣、氧化鈣及氟化鈣。The molten steel desulfurization method of the present invention includes subjecting the first desulfurizer and the first molten steel to a first desulfurization treatment in a first furnace at a preset temperature, and then discharging the hot first refining slag from the first furnace. and hot first desulfurized molten steel; make the second molten steel contact at least part of the hot first refining slag in a second melting furnace at a preset temperature, and then add a second desulfurizer to perform the second desulfurization. sulfur treatment, and then, the second refining slag and the second desulfurization molten steel are discharged from the second furnace, wherein the second desulfurization agent includes aluminum slag, calcium oxide and calcium fluoride.
以下對本發明進行詳細說明。The present invention will be described in detail below.
該第一脫硫劑能夠採用以往用於去除鋼液中的硫的脫硫劑。在本發明的一些實施態樣中，該第一脫硫劑包含氧化鈣及氟化鈣。As the first desulfurizer, a desulfurizer conventionally used for removing sulfur from molten steel can be used. In some embodiments of the present invention, the first desulfurizer includes calcium oxide and calcium fluoride.
該第一熔爐可採用以往用於去除鋼液中的硫的熔爐，故不再贅述。該第一熔爐例如但不限於電爐或精煉爐等。The first furnace can be a furnace used in the past to remove sulfur from molten steel, so the details will not be described again. The first furnace is, for example, but not limited to, an electric furnace or a refining furnace.
該第一脫硫處理的溫度及時間可依據該第一鋼液的種類或該第一脫硫鋼液所需的特性(例如脫硫率)進行調整。The temperature and time of the first desulfurization treatment can be adjusted according to the type of the first molten steel or the required characteristics (such as desulfurization rate) of the first desulfurization molten steel.
在本發明的一些實施態樣中，當該第一脫硫劑包含氧化鈣及氟化鈣時，該熱的第一精煉渣包含氧化鈣，而該氧化鈣是來自在進行該第一脫硫處理後該第一脫硫劑中未反應完的氧化鈣。由於該熱的第一精煉渣包含氧化鈣，因此，更有助於在該第二脫硫處理中使該第二鋼液的硫被去除，致使於該第二脫硫處理時，該第二脫硫劑的氧化鈣的用量得以被減少，從而更有助於達到減少整體渣量的目的。In some embodiments of the present invention, when the first desulfurizer includes calcium oxide and calcium fluoride, the hot first refining slag includes calcium oxide, and the calcium oxide comes from performing the first desulfurization. Unreacted calcium oxide in the first desulfurizer after treatment. Since the hot first refining slag contains calcium oxide, it is more helpful to remove sulfur from the second molten steel in the second desulfurization process, so that during the second desulfurization process, the second The amount of calcium oxide used as desulfurizer can be reduced, which is more conducive to reducing the overall slag amount.
該第二脫硫劑的鋁渣能夠用來降低該第二脫硫劑的氧化鈣的液化溫度，並與氧化鈣形成Ca 12Al 14O 33結晶相，而有助於提升整體的脫硫性能。該鋁渣例如但不限於來自煉鋁廠的鋁渣。在本發明的一些實施態樣中，該鋁渣包含三氧化二鋁。 The aluminum slag of the second desulfurizer can be used to lower the liquefaction temperature of the calcium oxide of the second desulfurizer and form a Ca 12 Al 14 O 33 crystal phase with the calcium oxide, which helps to improve the overall desulfurization performance. . The aluminum slag is, for example, but not limited to, aluminum slag from an aluminum smelter. In some embodiments of the present invention, the aluminum slag contains aluminum oxide.
該第二熔爐可採用以往用來脫去鋼液中的硫的熔爐，故不再贅述。該第二熔爐例如但不限於電爐或精煉爐等。The second furnace can be a furnace used in the past to remove sulfur from molten steel, so the details will not be described again. The second melting furnace may be, but is not limited to, an electric furnace or a refining furnace.
該第二脫硫處理的溫度及時間可依據該第二鋼液的種類或該第二脫硫鋼液所需的特性(例如脫硫率)進行調整。The temperature and time of the second desulfurization treatment can be adjusted according to the type of the second molten steel or the required characteristics (such as desulfurization rate) of the second desulfurization molten steel.
本發明將就以下實施例來作進一步說明，但應瞭解的是，該等實施例僅為例示說明之用，而不應被解釋為本發明實施之限制。The present invention will be further described with reference to the following examples, but it should be understood that these examples are only for illustration and should not be construed as limitations on the implementation of the present invention.
實施例1Example 1
步驟(a)：使鋼原料在鋼廠的電弧爐中進行熔煉處理，形成第一鋼液(成分：279ppm的硫及117ppm的磷)。使1650公斤的第一脫硫劑(包含1350公斤的氧化鈣及300公斤的氟化鈣)與100公噸的該第一鋼液在溫度設定在1600℃的精煉爐中，進行0.5小時的第一脫硫處理，然後，自該精煉爐中，排出1860公斤熱的第一精煉渣及熱的第一脫硫鋼液(包含85ppm的硫及121ppm的磷)。Step (a): The steel raw material is smelted in the electric arc furnace of the steel plant to form the first molten steel (composition: 279 ppm sulfur and 117 ppm phosphorus). Make 1,650 kilograms of the first desulfurizer (including 1,350 kilograms of calcium oxide and 300 kilograms of calcium fluoride) and 100 metric tons of the first molten steel for 0.5 hours in a refining furnace set at 1,600°C. After desulfurization treatment, 1860 kilograms of hot first refining slag and hot first desulfurization molten steel (including 85 ppm sulfur and 121 ppm phosphorus) are discharged from the refining furnace.
步驟(b)：使鋼原料在鋼廠的電弧爐中進行熔煉處理，形成第二鋼液(成分：290ppm的硫及147ppm的磷)。將100公噸的該第二鋼液及500公斤的步驟(a)的該熱的第一精煉渣直接導入溫度設定在1600℃的精煉爐中，並在該精煉爐中接觸5分鐘，接著，加入800公斤的第二脫硫劑，進行0.5小時的第二脫硫處理，然後，自該精煉爐中排出1510公斤的第二精煉渣及第二脫硫鋼液(包含88ppm的硫及143ppm的磷)，其中，該第二脫硫劑包含200公斤的鋁渣[來源：佐明金屬科技股份有限公司；成分：20wt%的氮化鋁(AlN)、75wt%的三氧化二鋁及5wt%的鋁]、550公斤的氧化鈣及50公斤的氟化鈣。Step (b): The steel raw material is smelted in an electric arc furnace in a steel plant to form a second molten steel (composition: 290 ppm sulfur and 147 ppm phosphorus). 100 metric tons of the second molten steel and 500 kg of the hot first refining slag of step (a) are directly introduced into a refining furnace whose temperature is set at 1600°C, and contacted in the refining furnace for 5 minutes. Then, add 800 kg of the second desulfurizer was used for 0.5 hours of second desulfurization treatment, and then 1510 kg of the second refining slag and the second desulfurization liquid steel (including 88 ppm sulfur and 143 ppm phosphorus) were discharged from the refining furnace. ), wherein the second desulfurizer contains 200 kilograms of aluminum slag [Source: Zuoming Metal Technology Co., Ltd.; ingredients: 20wt% aluminum nitride (AlN), 75wt% aluminum oxide and 5wt% aluminum], 550 kg of calcium oxide and 50 kg of calcium fluoride.
實施例2至3Examples 2 to 3
實施例2至3的製備方法與實施例1大致相同，主要差異在於：改變第二鋼液的種類及第二脫硫劑的用量。The preparation methods of Examples 2 to 3 are substantially the same as those of Example 1, with the main difference being that the type of the second molten steel and the amount of the second desulfurizer are changed.
比較例1Comparative example 1
第一批次：使鋼原料在鋼廠的電弧爐中進行熔煉處理，形成第一鋼液(成分：279ppm的硫及117ppm的磷)。使1650公斤的第一脫硫劑(包含1350公斤的氧化鈣及300公斤的氟化鈣)與100公噸的該第一鋼液在溫度設定在1600℃的精煉爐中，進行0.5小時的第一脫硫處理，然後，自該精煉爐中，排出1860公斤熱的第一精煉渣及熱的第一脫硫鋼液(包含85ppm的硫及121ppm的磷)。The first batch: The steel raw materials are smelted in the electric arc furnace of the steel plant to form the first molten steel (composition: 279 ppm sulfur and 117 ppm phosphorus). Make 1,650 kilograms of the first desulfurizer (including 1,350 kilograms of calcium oxide and 300 kilograms of calcium fluoride) and 100 metric tons of the first molten steel for 0.5 hours in a refining furnace set at 1,600°C. After desulfurization treatment, 1860 kilograms of hot first refining slag and hot first desulfurization molten steel (including 85 ppm sulfur and 121 ppm phosphorus) are discharged from the refining furnace.
第二批次：使鋼原料在鋼廠的電弧爐中進行熔煉處理，形成第二鋼液(成分：233ppm的硫及127ppm的磷)。使1650公斤的第二脫硫劑(包含1350公斤的氧化鈣及300公斤的氟化鈣)與100公噸的該第二鋼液在溫度設定在1600℃的精煉爐中，進行0.5小時的第二脫硫處理，然後，自該精煉爐中，排出1860公斤熱的第二精煉渣及熱的第二脫硫鋼液(包含79ppm的硫及124ppm的磷)。The second batch: The steel raw materials are smelted in the electric arc furnace of the steel plant to form the second molten steel (composition: 233 ppm sulfur and 127 ppm phosphorus). Make 1,650 kilograms of the second desulfurizer (including 1,350 kilograms of calcium oxide and 300 kilograms of calcium fluoride) and 100 metric tons of the second molten steel for 0.5 hours in a refining furnace set at 1,600°C. After desulfurization treatment, 1860 kg of hot second refining slag and hot second desulfurized steel liquid (including 79 ppm of sulfur and 124 ppm of phosphorus) are discharged from the refining furnace.
評價項目Evaluation items
渣總量計算：比較例1的渣總量為第一批次所形成的第一精煉渣的量與第二批次所形成的第二精煉渣的量的總和。實施例1至3的渣總量為[步驟(a)的第一精煉渣的量+步驟(b)的第二精煉渣的量]－步驟(b)的第一精煉渣的量。Calculation of the total amount of slag: The total amount of slag in Comparative Example 1 is the sum of the amount of the first refining slag formed in the first batch and the amount of the second refining slag formed in the second batch. The total amount of slag in Examples 1 to 3 is [the amount of the first refining slag in step (a) + the amount of the second refining slag in step (b)] - the amount of the first refining slag in step (b).
渣減量的計算：[(各實施例的渣總量－比較例1的渣總量)/比較例1的渣總量]×100%。Calculation of slag reduction: [(Total slag amount in each example - Total slag amount in Comparative Example 1)/Total slag amount in Comparative Example 1] × 100%.
第二脫硫處理的硫含量及脫硫率(單位：%)量測：將100克的實施例1至3的第二鋼液與第二脫硫鋼液及比較例1的第二鋼液與第二脫硫鋼液利用火花直讀光譜儀(spark emission spectrometer；廠牌：Bruker；型號：Q8 MAGELLAN)量測硫的含量(單位：ppm)，其中，該脫硫率=[(第二鋼液中的硫含量－第二脫硫鋼液中的硫含量)/第二鋼液中的硫含量]×100%。Measurement of sulfur content and desulfurization rate (unit: %) of the second desulfurization treatment: 100 grams of the second molten steel of Examples 1 to 3 and the second molten steel of Comparative Example 1 Use a spark emission spectrometer (spark emission spectrometer; Brand: Bruker; Model: Q8 MAGELLAN) to measure the sulfur content (unit: ppm) with the second desulfurized molten steel, where the desulfurization rate = [(Second Steel The sulfur content in the liquid - the sulfur content in the second desulfurized molten steel) / the sulfur content in the second molten steel] × 100%.
第二脫硫處理的磷含量(單位：ppm)量測：將100克的實施例1至3的第二脫硫鋼液及比較例1的第二脫硫鋼液利用火花直讀光譜儀(spark emission spectrometer；廠牌：Bruker；型號：Q8 MAGELLAN)量測磷的含量。Measurement of the phosphorus content (unit: ppm) of the second desulfurization treatment: 100 grams of the second desulfurization molten steel of Examples 1 to 3 and the second desulfurization molten steel of Comparative Example 1 were measured using a spark direct reading spectrometer (spark emission spectrometer; Brand: Bruker; Model: Q8 MAGELLAN) to measure phosphorus content.
表1
綜上所述，在本發明鋼液脫硫方法中，該第一精煉渣及鋁渣能夠被再利用而賦予新價值，同時，相較於利用包含氧化鈣及氟化鈣的新鮮第二脫硫劑對第一鋼液及第二鋼液進行脫硫處理的鋼液脫硫方法整體所產生的渣量，本發明鋼液脫硫方法透過直接將步驟(a)的該熱的第一精煉渣用於第二次脫硫處理，而具有能夠減少整體的渣量而具有環保的優點，故確實能達成本發明的目的。To sum up, in the molten steel desulfurization method of the present invention, the first refining slag and aluminum slag can be reused and given new value. At the same time, compared with the use of fresh second desulfurization containing calcium oxide and calcium fluoride, The amount of slag produced by the entire molten steel desulfurization method in which the first molten steel and the second molten steel are desulfurized by the sulfur agent. The molten steel desulfurization method of the present invention directly uses the heat of the first refining process in step (a). The slag is used for the second desulfurization treatment, and has the advantage of being able to reduce the overall amount of slag and being environmentally friendly, so the purpose of the present invention can indeed be achieved.
惟以上所述者，僅為本發明的實施例而已，當不能以此限定本發明實施的範圍，凡是依本發明申請專利範圍及專利說明書內容所作的簡單的等效變化與修飾，皆仍屬本發明專利涵蓋的範圍內。However, the above are only examples of the present invention. They cannot be used to limit the scope of the present invention. All simple equivalent changes and modifications made based on the patent scope of the present invention and the contents of the patent specification are still within the scope of the present invention. within the scope covered by the patent of this invention.
無。without.
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| TW201829790A (en) * | 2017-01-19 | 2018-08-16 | 日商杰富意鋼鐵股份有限公司 | Desulfurization treatment method for molten steel, and desulfurization agent |
| WO2020217828A1 (en) * | 2019-04-24 | 2020-10-29 | Ｊｆｅスチール株式会社 | Method for desulfurization of molten metal |
| CN114045376A (en) * | 2021-10-18 | 2022-02-15 | 首钢集团有限公司 | Method for desulfurizing molten steel in converter tapping process |
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| US20160222479A1 (en) * | 2015-02-02 | 2016-08-04 | National Chung-Hsing University | Desulfurization composition |
| TW201829790A (en) * | 2017-01-19 | 2018-08-16 | 日商杰富意鋼鐵股份有限公司 | Desulfurization treatment method for molten steel, and desulfurization agent |
| WO2020217828A1 (en) * | 2019-04-24 | 2020-10-29 | Ｊｆｅスチール株式会社 | Method for desulfurization of molten metal |
| CN114045376A (en) * | 2021-10-18 | 2022-02-15 | 首钢集团有限公司 | Method for desulfurizing molten steel in converter tapping process |
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