TWI795099B - Double-layer composite filler sand for well block of steel ladle - Google Patents
Double-layer composite filler sand for well block of steel ladle Download PDFInfo
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本發明係關於一種用於盛鋼桶之座磚的材料，特別是關於一種用於盛鋼桶之座磚的雙層複合填充砂。The invention relates to a material used for a seat brick of a steel drum, in particular to a double-layer composite filling sand used for a seat brick of a steel drum.
盛鋼桶是一種用來二次精煉熔融金屬的容器。參照第1圖，其為習知填充砂於盛鋼桶使用的狀態示意圖，在目前大多數的鋼廠的澆鑄作業中，會使用填充砂填滿位於盛鋼桶1的底部的座磚11’，鋼液與填充砂F接觸的部分會產生燒結層L’來阻隔鋼液滲透。當澆鑄作業進行而使滑門2’開啟時，未燒結的填充砂會先行落下，接著透過鋼液的靜壓力將燒結層L’壓破，使得鋼液可以通過燒結層L’流出至下方的鋼液分配器D，這樣的過程稱為自然開口。A ladle is a vessel used for secondary refining of molten metal. Referring to Figure 1, it is a schematic diagram of the state of using the conventional filling sand in the steel ladle. In the casting operation of most steel factories at present, the filling sand is used to fill the seat brick 11' at the bottom of the
中華民國專利第I417268號揭露了一種用於填充盛鋼桶之填充砂粒，可使鋼液在盛鋼桶流鋼嘴之滑門開啟後自然開口流過。此專利的技術特徵在於其填充砂粒具備核/殼結構。核心粉粒之材質包含碳化矽礦砂。殼層包覆於核心粉粒外，殼層之材質包含氧化矽，且殼層易與鋼液反應形成燒結層。然而，由於均匀核殼結構的填充砂粒難以製備，以及估計成本昂貴，因此實務上未被落實於鋼廠，並且，亦缺乏高溫燒結分析的佐證。The Republic of China Patent No. I417268 discloses a kind of filling grit for filling the ladle, which can make molten steel flow through the natural opening after the sliding door of the steel ladle's flow nozzle is opened. The technical feature of this patent is that its filled sand has a core/shell structure. The material of the core powder contains silicon carbide ore. The shell coats the core powder, the material of the shell includes silicon oxide, and the shell is easy to react with molten steel to form a sintered layer. However, due to the difficulty of preparing the filling sand with a uniform core-shell structure and the estimated cost is high, it has not been implemented in steel plants in practice, and there is also a lack of evidence for high-temperature sintering analysis.
中華民國專利第I593657號揭露了一種盛鋼桶用鉻質滑門砂，其技術特徵在於製備盛鋼桶用鉻質滑門砂，該鉻質滑門砂使用複合原料，包括鉻礦砂、砂砂以及鉀長石，其中組成上具有特定比例之Cr 2O 3、SiO 2以及 K 2O，具有提高自然開口率的技術功效。然而，雖然實務上該鉻質滑門砂具備良好的開口率，但大多是應用於較不嚴苛（受鋼時間約90分鐘）的煉鋼製程中，才具有較好的開口率表現（大於99%）。也就是說，倘若是應用在冶煉特殊鋼種（受鋼時間大於180分鐘）或是不鏽鋼（受鋼時間為6至8小時），則該鉻質滑門砂的開口率會下降至95至98%（特殊鋼種），甚至大幅降低至50至85%（不鏽鋼）。 Patent No. I593657 of the Republic of China discloses a chrome sliding door sand for steel drums. Its technical feature is to prepare chrome sliding door sand for steel drums. The chrome sliding door sand uses composite materials, including chrome ore, sand sand And potassium feldspar, wherein the composition has a specific ratio of Cr 2 O 3 , SiO 2 and K 2 O, which has the technical effect of increasing the natural opening ratio. However, although the chrome sliding door sand has a good opening ratio in practice, it has a good opening ratio performance (greater than 99%). That is to say, if it is used in smelting special steel (steel-receiving time greater than 180 minutes) or stainless steel (steel-receiving time is 6-8 hours), the opening ratio of the chrome sliding door sand will drop to 95-98% (special steel grades), or even significantly reduced to 50 to 85% (stainless steel).
實際上，真正形成燒結層的填充砂僅是少量與鋼液接觸的部分，絕大部分的填充砂都是直接滑落至鋼液分配器而形成爐渣。為了形成關鍵且適當厚度的燒結層，填充砂的配方包括成本高的礦砂，並對其粒徑嚴格要求，在此情況下，目前的填充砂存在用料浪費的問題。In fact, only a small amount of the filling sand that actually forms the sintered layer is in contact with the molten steel, and most of the filling sand slides directly to the molten steel distributor to form slag. In order to form a critical and appropriate thickness of the sintered layer, the formulation of the filling sand includes high-cost mineral sand, and its particle size is strictly required. In this case, the current filling sand has the problem of material waste.
由上可知，習知之填充砂的成分有其改良之必要。It can be seen from the above that it is necessary to improve the composition of the conventional filling sand.
本發明之主要目的在於提供一種用於盛鋼桶之座磚的雙層複合填充砂，以避免用料的浪費。The main purpose of the present invention is to provide a double-layer composite filling sand for the seat brick of the steel ladle, so as to avoid waste of materials.
為達上述之目的，在本發明之一實施例中，提供一種盛鋼桶之座磚的雙層複合填充砂，該雙層複合填充砂係填充在一盛鋼桶的底部之一座磚中，該雙層複合填充砂包含：一燒結反應砂，做為該雙層複合填充砂的一上層，用以供接觸鋼液而形成阻隔用的一燒結層；以及一填縫支撑砂，設置在該燒結反應砂的下方，而做為該雙層複合填充砂的一下層，用以支撐該燒結反應砂，其中該燒結反應砂包括鉻礦砂，且該燒結反應砂的厚度為該座磚之一凹穴的深度的1/2至1/3，以及該填縫支撑砂的厚度為該座磚之該凹穴的深度的1/2至2/3，以及該填縫支撑砂包括含鎂舊耐材細粉料。In order to achieve the above-mentioned purpose, in one embodiment of the present invention, a double-layer composite filling sand for a seat brick of a steel drum is provided, the double-layer composite filling sand is filled in a seat brick at the bottom of a steel drum, The double-layer composite filling sand includes: a sintering reaction sand, which is used as an upper layer of the double-layer composite filling sand, and is used to form a sintered layer for contacting molten steel to form a barrier; and a caulking support sand, which is arranged on the The lower part of the sintering reaction sand is used as the lower layer of the double-layer composite filling sand to support the sintering reaction sand, wherein the sintering reaction sand includes chrome ore, and the thickness of the sintering reaction sand is one concave 1/2 to 1/3 of the depth of the cavity, and the thickness of the caulking support sand is 1/2 to 2/3 of the depth of the cavity of the block, and the caulking support sand includes magnesium-containing old Material fine powder.
在本發明之一實施例中，該座磚之該凹穴的深度為460至480毫米，而該燒結反應砂經接觸該鋼液所形成的該燒結層的厚度為7毫米至16毫米。In one embodiment of the present invention, the depth of the cavity of the block is 460-480 mm, and the thickness of the sintered layer formed by the sintering reaction sand contacting the molten steel is 7 mm-16 mm.
在本發明之一實施例中，該燒結反應砂經接觸該鋼液所形成的該燒結層的厚度為7毫米至8毫米。In one embodiment of the present invention, the sintered layer formed by the sintered reaction sand contacting the molten steel has a thickness of 7 mm to 8 mm.
在本發明之一實施例中，該燒結反應砂包括選自於由矽砂以及長石砂所組成之群組中的一個或多個。In one embodiment of the present invention, the sintering reaction sand includes one or more selected from the group consisting of silica sand and feldspar sand.
在本發明之一實施例中，該燒結反應砂包括Cr 2O 3及SiO 2，且Cr 2O 3及SiO 2的重量比為1.01 至2.31。 In one embodiment of the present invention, the sintering reaction sand includes Cr 2 O 3 and SiO 2 , and the weight ratio of Cr 2 O 3 and SiO 2 is 1.01 to 2.31.
在本發明之一實施例中，該燒結反應砂的粒徑為0.15毫米至0.85毫米。In one embodiment of the present invention, the particle size of the sintering reaction sand is 0.15 mm to 0.85 mm.
在本發明之一實施例中，該填縫支撑砂的安息角小於40度。In one embodiment of the present invention, the angle of repose of the caulking support sand is less than 40 degrees.
在本發明之一實施例中，該填縫支撑砂包括天然矽砂。In one embodiment of the present invention, the caulking support sand includes natural silica sand.
為達上述之目的，在本發明之一實施例中，提供一種使用如上述之雙層複合填充砂對一座磚進行充填的方法，包含：將一填縫支撑砂投入至該座磚之一凹穴的底部，並將該填縫支撑砂填至平整，其中該填縫支撑砂被投入該座磚的厚度為該座磚之該凹穴的深度的1/2至2/3；以及將一燒結反應砂投入該座磚之該凹穴，直至填滿該凹穴，以形成一雙層複合填充砂，其中該燒結反應砂被投入該座磚之該凹穴的厚度為該座磚之該凹穴的深度的1/2至1/3。In order to achieve the above-mentioned purpose, in one embodiment of the present invention, a method for filling a brick with the above-mentioned double-layer composite filling sand is provided, including: putting a joint filling support sand into a concave of the brick The bottom of the cavity, and fill the caulking support sand until it is flat, wherein the thickness of the caulking support sand injected into the block is 1/2 to 2/3 of the depth of the cavity of the block; and a The sintering reaction sand is poured into the cavity of the block until the cavity is filled to form a double-layer composite filling sand, wherein the thickness of the cavity of the block into which the sintering reaction sand is put is the thickness of the cavity of the block. 1/2 to 1/3 of the depth of the pocket.
在本發明之一實施例中，該燒結反應砂包括Cr 2O 3及SiO 2，且Cr 2O 3及SiO 2的重量比為1.01 至2.31。 In one embodiment of the present invention, the sintering reaction sand includes Cr 2 O 3 and SiO 2 , and the weight ratio of Cr 2 O 3 and SiO 2 is 1.01 to 2.31.
本發明的有益效果在於：The beneficial effects of the present invention are:
雙層複合填充砂中上層的燒結反應砂經接觸鋼液的熱，而形成燒結層，進而阻隔鋼液向下的滲透；而下層的填縫支撐砂在滑門尚未開啟之前用以作為墊底並支撑燒結層。此外，該燒結反應砂係選用鉻礦砂為主原料，鉻礦砂具備較高的耐火度以及較低的熱傳導，因而可進一步於高溫且長時間的冶煉環境下形成不連續相，以穩定燒結層，減緩該燒結層的增厚速率，進而提升自然開口率。而該填縫支撐砂則選用成本較低的含鎂舊耐材細料，含鎂舊耐材細料為煉鋼製程下產生事業廢棄於物，透過這樣的手段，不僅達到墊底填縫的效果，還可落實循環經濟。 換句話說，透過將填充砂選用不同種類的砂體，該不同種類的砂體各具備不同的性質及成本，不僅可達到相較於習知同等甚至更好的開口率，還能避免原料浪費，進而降低成本及落實環保。The sintering reaction sand in the upper layer of the double-layer composite filling sand is exposed to the heat of molten steel to form a sintered layer, thereby blocking the downward penetration of molten steel; while the caulking support sand in the lower layer is used as a base before the sliding door is opened. Support the sintered layer. In addition, the sintering reaction sand uses chrome ore as the main raw material. The chrome ore has high refractoriness and low heat conduction, so it can further form a discontinuous phase in a high-temperature and long-term smelting environment to stabilize the sintered layer. The thickening rate of the sintered layer is slowed down, thereby increasing the natural aperture ratio. The support sand for caulking uses low-cost old refractory fine materials containing magnesium. The old refractory fine materials containing magnesium are industrial waste generated in the steelmaking process. Through this method, not only the effect of bottom filling is achieved , but also implement circular economy. In other words, by selecting different types of sand bodies for filling sand, each of which has different properties and costs, not only can achieve the same or even better opening ratio than the conventional one, but also avoid waste of raw materials , thereby reducing costs and implementing environmental protection.
下面將結合本發明之實施例中的附圖，對本發明之實施例中的技術方案進行清楚、完整地描述。另外，為了更好地說明本發明，在下文的具體實施方式中給出了眾多的具體細節。本領域技術人員應當理解，沒有某些具體細節，本發明同樣可以實施。The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. In addition, in order to better illustrate the present invention, numerous specific details are given in the specific embodiments below. It will be understood by those skilled in the art that the present invention may be practiced without certain of the specific details.
參照第2圖，根據本發明的一實施例提供了一種盛鋼桶之座磚的雙層複合填充砂，該雙層複合填充砂係填充在一盛鋼桶的底部之一座磚11中，該雙層複合填充砂包含：一燒結反應砂31，做為該雙層複合填充砂的一上層，用以供接觸鋼液而形成阻隔用的一燒結層L；以及一填縫支撑砂32，設置在該燒結反應砂31的下方，而做為該雙層複合填充砂的一下層，用以支撐該燒結反應砂31。Referring to Fig. 2, according to an embodiment of the present invention, a double-layer composite filling sand for a seat brick of a steel drum is provided, the double-layer composite filling sand is filled in a
該燒結反應砂31包括鉻礦砂為主原料，並含有Cr
2O
3及SiO
2，其中Cr
2O
3及SiO
2的重量比為1.01 至2.31，例如1、1.1、1.2、1.3、1.4、1.5、1.6、1.7、1.8、1.9、2、1.1、2.2、2.3。較佳地，Cr
2O
3及SiO
2的重量比為1.46。鉻礦砂具備較高的耐火度以及較低的熱傳導，因而可進一步於高溫且長時間的冶煉環境下形成不連續相，以穩定燒結層，減緩該燒結層L的增厚速率，進而提升自然開口率；而該填縫支撑砂包括含鎂舊耐材細粉料，其為煉鋼過程中所產生的事業廢棄物，而可落實循環經濟。選擇性地，在其他實施例中，燒結反應砂可包括選自於由矽砂以及長石砂所組成之群組中的一個或多個，以及填縫支撑砂還可包括天然矽砂。
The
該燒結反應砂31的粒徑為0.15毫米至0.85毫米，例如0.15、0.2、0.25、0.3、0.35、0.4、0.45、0.5、0.55、0.6、0.65、0.7、0.75、0.8、0.85毫米。並且，該燒結反應砂及該填縫支撑砂的安息角均小於40度，表示屬於具備流動性粉體，而可在滑門開啟時順利落下。The particle size of the
該燒結反應砂31的厚度為該座磚11之一凹穴111的深度的1/2至1/3，以及該填縫支撑砂32的厚度為該座磚11之該凹穴111的深度的1/2至2/3，其中該凹穴111的深度為該燒結反應砂31的頂部至一滑門2的頂部的垂直距離。詳細而言，在本實施例中，該座磚11之該凹穴111的深度為460毫米至480毫米，例如460、465、470、475或480毫米，選擇性地，467毫米；而該燒結反應砂31經接觸該鋼液所形成的該燒結層L的厚度為7毫米至16毫米，例如，7、8、9、10、11、12、13、14、15或16毫米，選擇性地，該燒結層L的厚度為7毫米至8毫米。The thickness of the
以下詳細說明本發明的燒結反應砂的厚度、填縫支撑砂的厚度與座磚之凹穴的深度之間的關係是如何得到的。How to obtain the relationship between the thickness of the sintering reaction sand, the thickness of the caulking support sand and the depth of the cavity of the seat brick in detail below.
首先，參照第3圖，其顯示出一鋼液滲透測試的結果，在該鋼液滲透測試中，使用一耐火磚來模擬為盛鋼桶的座磚，底磚B則做為該耐火磚的底部，接著，在該耐火磚內填充入本發明的雙層複合填充砂，並倒入鋼液進行鋼液滲透測試。結果如第3圖所示，由上而下分別為鋼液凝固塊S及填充砂F（即，燒結層），可以發現，本發明之雙層複合填充砂順利生成有一燒結層，而有效阻絕鋼液向下滲透。接著，參照第4圖，其為透過電子顯微鏡觀察該燒結層的界面，可看到由上至下分別為鋼液凍結層311、緻密燒結層312以及鬆散燒結層313，其中該緻密燒結層312為鋼液對燒結反應砂滲透的部分，並且相較於鬆散燒結層313較為緻密。當鋼液靜壓力壓斷該燒結層的瞬間，該燒結層變形折斷的當下，可藉由各應力的計算反推估的此三個層體（鋼液凍結層311、緻密燒結層312以及鬆散燒結層313）的臨界厚度，如下式1：First, refer to Figure 3, which shows the results of a molten steel penetration test in which a refractory brick was used to simulate the seat brick of the ladle, and the bottom brick B was used as the refractory brick At the bottom, then, the refractory brick is filled with the double-layer composite filling sand of the present invention, and poured into molten steel for molten steel penetration test. The results are shown in Figure 3. From top to bottom, there are molten steel solidified block S and filling sand F (ie, sintered layer). It can be found that the double-layer composite filling sand of the present invention successfully generates a sintered layer, which effectively prevents Liquid steel seeps downwards. Next, referring to Fig. 4, it is to observe the interface of the sintered layer through an electron microscope, and it can be seen that from top to bottom there are molten steel frozen
P=P1+P2+P3=
其中γ1為鋼液凍結層的厚度；γ2為緻密燒結層的厚度；γ3為鬆散燒結層的厚度；P為鋼液靜壓力；δ1、δ2、δ3為各層體所受的剪應力；R 1、R 2、R 3為各層體開口瞬間的極限半徑；P1、P2、P3為各層體抗鋼液靜壓之破壞強度。 Among them, γ1 is the thickness of the molten steel frozen layer; γ2 is the thickness of the dense sintered layer; γ3 is the thickness of the loose sintered layer; P is the static pressure of molten steel; δ1, δ2, δ3 are the shear stress of each layer; R 2 and R 3 are the instantaneous limit radius of the opening of each layer; P1, P2, P3 are the failure strength of each layer against the hydrostatic pressure.
藉由上述式1來計算，當鋼液靜壓力=0.2 MPa（實務上煉鋼廠的鋼液靜壓力）時，各層的臨界厚度為: γ1=0.5毫米、γ2=1毫米、γ3=9毫米，說明了燒結層的厚度控制在10毫米（含鋼液凍結層以及緻密燒結層）以內，能順利自然開口，並且達98%以上的自然開口率。Calculated by the
如前所提，本發明之雙層複合填充砂的填縫支撑砂係採用煉鋼過程中所產生的事業廢棄物，即含鎂舊耐材細粉料；或是可採用傳統填充砂的低價原料，例如天然矽砂，第5圖示出了天然矽砂G（第5圖的上方）以及含鎂舊耐材細粉料M（第5圖的下方）的外觀形貌 。As mentioned above, the joint filling supporting sand of the double-layer composite filling sand of the present invention adopts the industrial waste produced in the steelmaking process, that is, the old refractory fine powder containing magnesium; Valuable raw materials, such as natural silica sand, Figure 5 shows the appearance of natural silica sand G (top of Figure 5) and magnesium-containing old refractory fine powder M (bottom of Figure 5).
使用在盛鋼桶的座磚的材料須具備足夠的流動性，才可於盛鋼桶的滑門開啟時，順利滑落於下方的鋼液分配器。因此，進一步量測燒結反應砂以及填縫支撑砂的安息角。如下表1所示，燒結反應砂的安息角為35°、天然矽砂的安息角為36°，以及含鎂舊耐材細粉料的安息角為38°，均在40°以下，代表屬於具備流動性的粉體，而可在滑門開啟時順利落下。The material of the seat brick used in the ladle must have sufficient fluidity so that it can slide down smoothly to the molten steel distributor below when the sliding door of the ladle is opened. Therefore, the angle of repose of the sintering reaction sand and the caulking support sand was further measured. As shown in Table 1 below, the angle of repose of sintered reaction sand is 35°, the angle of repose of natural silica sand is 36°, and the angle of repose of magnesium-containing old refractory fine powder is 38°, all of which are below 40°, representing the Fluid powder can fall smoothly when the sliding door is opened.
［表1］
為了證明燒結反應砂以及填縫支撑砂在實際充填堆排時不互混而使用一燒杯中模擬本發明之雙層複合填充砂被填充入座磚的情況，操作如下：首先，將填縫支撑砂32填充入燒杯的底部，填入高度為1/2燒杯的深度或2/3燒杯的深度後。接著，再填入燒結反應砂31，填入高度為1/2燒杯的深度或1/3燒杯的深度。燒結反應砂31以及填縫支撑砂32充填堆排的狀態結果如第6圖所示，可看到，燒結反應砂31以及填縫支撑砂32此二種砂彼此之間穩定堆排而不互混，並且形成明顯的雙層界面結構。In order to prove that the sintering reaction sand and the caulking support sand do not mix with each other during actual filling and stacking, a beaker is used to simulate the situation that the double-layer composite filling sand of the present invention is filled into the seat brick. The operation is as follows: first, the
根據本發明的另一實施例提供了一種使用上述之雙層複合填充砂對一座磚進行充填的方法，包含：將一填縫支撑砂投入至該座磚之一凹穴的底部，並將該填縫支撑砂填至平整，其中該填縫支撑砂被投入該座磚的厚度為該座磚之該凹穴的深度的1/2至2/3；接著，將一燒結反應砂投入該座磚之該凹穴，直至填滿該凹穴或是高於該座磚而形成一微幅凸起的錐面，以形成一雙層複合填充砂，其中該燒結反應砂被投入該座磚之該凹穴的厚度為該座磚之該凹穴的深度的1/2至1/3。According to another embodiment of the present invention, there is provided a method for filling a brick with the above-mentioned double-layer composite filling sand, comprising: putting a joint filling support sand into the bottom of a cavity of the brick, and placing the The joint filling support sand is filled until it is flat, wherein the thickness of the joint filling support sand is put into the seat brick is 1/2 to 2/3 of the depth of the recess of the seat brick; then, a sintering reaction sand is put into the seat The cavity of the brick until it fills the cavity or is higher than the block to form a slightly raised conical surface to form a double-layer composite filling sand, wherein the sintering reaction sand is put into the block The thickness of the cavity is 1/2 to 1/3 of the depth of the cavity of the block.
綜上所述，本發明之雙層複合填充砂中上層的燒結反應砂經接觸鋼液的熱，而形成燒結層，進而阻隔鋼液向下的滲透；而下層的填縫支撐砂在滑門尚未開啟之前用以作為墊底並支撑燒結層。此外，該燒結反應砂係選用鉻礦砂，鉻礦砂具備較高的耐火度以及較低的熱傳導，因而可進一步於高溫且長時間的冶煉環境下形成不連續相，以穩定燒結層，減緩該燒結層的增厚速率，進而提升自然開口率。而該填縫支撐砂則選用成本較低的含鎂舊耐材細料，含鎂舊耐材細料為煉鋼製程下產生事業廢棄於物，透過這樣的手段，不僅達到墊底填縫的效果，還可落實循環經濟。 換句話說，透過將填充砂選用不同種類的砂體，該不同種類的砂體各具備不同的性質及成本，不僅可達到相較於習知同等甚至更好的開口率，還能避免原料浪費，進而降低成本及落實環保。To sum up, the sintering reaction sand in the upper layer of the double-layer composite filling sand of the present invention contacts the heat of molten steel to form a sintered layer, thereby blocking the downward penetration of molten steel; It is used as a base and supports the sintered layer before opening. In addition, the sintering reaction sand is made of chrome ore, which has high refractoriness and low heat conduction, so it can further form a discontinuous phase in a high-temperature and long-term smelting environment to stabilize the sintering layer and slow down the sintering. The thickening rate of the layer increases the natural aperture ratio. The support sand for caulking uses low-cost old refractory fine materials containing magnesium. The old refractory fine materials containing magnesium are industrial waste generated in the steelmaking process. Through this method, not only the effect of bottom filling is achieved , but also implement circular economy. In other words, by selecting different types of sand bodies for filling sand, each of which has different properties and costs, not only can achieve the same or even better opening ratio than the conventional one, but also avoid waste of raw materials , thereby reducing costs and implementing environmental protection.
雖然本發明已以較佳實施例揭露，然其並非用以限制本發明，任何熟習此項技藝之人士，在不脫離本發明之精神和範圍內，當可作各種更動與修飾，因此本發明之保護範圍當視後附之申請專利範圍所界定者為準。Although the present invention has been disclosed with preferred embodiments, it is not intended to limit the present invention. Anyone skilled in this art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of protection shall be determined by the scope of the attached patent application.
1:盛鋼桶
11、11’:座磚
111:凹穴
2、2’:滑門
31:燒結反應砂
311:鋼液凍結層
312:緻密燒結層
313:鬆散燒結層
32:填縫支撑砂
B:底磚
D:鋼液分配器
F:填充砂
G:天然矽砂
L、L’:燒結層
M:含鎂舊耐材細粉料
S:鋼液凝固塊
1:
第1圖為根據習知單一種填充砂於盛鋼桶使用的狀態示意圖； 第2圖為根據本發明之一實施例的一種雙層複合填充砂於盛鋼桶使用的狀態示意圖； 第3圖顯示根據本發明之一實施例的一種雙層複合填充砂於接觸鋼液後所形成的燒結層； 第4圖顯示根據本發明之一實施例的一種雙層複合填充砂於接觸鋼液後所形成的燒結層界面； 第5圖顯示了含鎂舊耐材細料及天然矽砂的外觀；以及 第6圖顯示了根據本發明之一實施例的一種雙層複合填充砂的充填狀態。 Figure 1 is a schematic diagram of the state of using a single type of filled sand in a steel drum according to the prior art; Figure 2 is a schematic diagram of a state in which a double-layer composite filling sand is used in a steel drum according to an embodiment of the present invention; Figure 3 shows a sintered layer formed after contacting molten steel of a double-layer composite filling sand according to an embodiment of the present invention; Fig. 4 shows a sintered layer interface formed after contacting molten steel of a kind of double-layer composite filling sand according to an embodiment of the present invention; Figure 5 shows the appearance of magnesium-containing old refractory fines and natural silica sand; and Fig. 6 shows a filling state of a double-layer composite filling sand according to an embodiment of the present invention.
11:座磚 11: seat brick
111:凹穴 111: pit
2:滑門 2: sliding door
31:燒結反應砂 31: Sintering reaction sand
32:填縫支撐砂 32: caulking support sand
L:燒結層 L: sintered layer
Claims (9)
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|---|---|---|---|---|
| TW201710213A (en) * | 2015-09-08 | 2017-03-16 | 中國鋼鐵股份有限公司 | Chromium-based stuffing sand for steel ladle |
| CN111283181A (en) * | 2020-02-27 | 2020-06-16 | 北京首钢股份有限公司 | Filling method of double-layer drainage sand and application thereof |
| CN112247131A (en) * | 2020-09-16 | 2021-01-22 | 德龙钢铁有限公司 | Ladle drainage sand and sand adding method |
| CN112743071A (en) * | 2020-12-30 | 2021-05-04 | 湖南华菱湘潭钢铁有限公司 | high-Cr alloy steel drainage sand and use method thereof |
| CN113275552A (en) * | 2020-12-08 | 2021-08-20 | 常熟市龙腾特种钢有限公司 | Drainage sand filling method capable of improving self-opening rate of steel ladle |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201710213A (en) * | 2015-09-08 | 2017-03-16 | 中國鋼鐵股份有限公司 | Chromium-based stuffing sand for steel ladle |
| CN111283181A (en) * | 2020-02-27 | 2020-06-16 | 北京首钢股份有限公司 | Filling method of double-layer drainage sand and application thereof |
| CN112247131A (en) * | 2020-09-16 | 2021-01-22 | 德龙钢铁有限公司 | Ladle drainage sand and sand adding method |
| CN113275552A (en) * | 2020-12-08 | 2021-08-20 | 常熟市龙腾特种钢有限公司 | Drainage sand filling method capable of improving self-opening rate of steel ladle |
| CN112743071A (en) * | 2020-12-30 | 2021-05-04 | 湖南华菱湘潭钢铁有限公司 | high-Cr alloy steel drainage sand and use method thereof |
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