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METHOD OF CHOOSING MgO-C BRICK, METHOD OF OPERATING MOLTEN METAL CONTAINER, AND LINING STRUCTURE OF MOLTEN METAL CONTAINER
To impart excellent durability to a MgO-C brick upon using the same in a lining structure of an intermittently operated molten metal container.SOLUTION: There is provided a method of choosing a MgO-C brick for use in a lining structure of an intermittently operated molten metal container, comprising a step of choosing a MgO-C brick whose test piece shows permeability of not lower than 10.0×10msubsequent to repeating processes of heating a test piece of the MgO-C brick up to 1600°C, keeping the test piece at 1600°C for 3 hours, slowly cooling the test piece down to 500°C, and keeping the test piece at 500°C for 3 hours, 10 times under a reduction atmosphere, and a step of choosing a MgO-C brick according to its apparent porosity subsequent to reduction calcination.SELECTED DRAWING: Figure 2
【課題】ＭｇＯ−Ｃれんがを間欠操業を行う溶融金属容器の内張り構造に用いる場合に良好な耐用性を得る。【解決手段】間欠操業を行う溶融金属容器の内張り構造に用いられるＭｇＯ−Ｃれんがの選定方法であって、ＭｇＯ−Ｃれんがの試験片を１６００℃まで加熱する工程、試験片を１６００℃で３時間保持する工程、試験片を５００℃まで徐冷する工程、および試験片を５００℃で３時間保持する工程を、還元雰囲気下で１０回繰り返した後に、試験片の通気率が１０．０×１０−１５ｍ２以上であるＭｇＯ−Ｃれんがを選定するステップと、還元焼成後の見掛け気孔率に基づいてＭｇＯ−Ｃれんがを選定するステップとを含む、ＭｇＯ−Ｃれんがの選定方法が提供される。【選択図】図２
METHOD OF CHOOSING MgO-C BRICK, METHOD OF OPERATING MOLTEN METAL CONTAINER, AND LINING STRUCTURE OF MOLTEN METAL CONTAINER
To impart excellent durability to a MgO-C brick upon using the same in a lining structure of an intermittently operated molten metal container.SOLUTION: There is provided a method of choosing a MgO-C brick for use in a lining structure of an intermittently operated molten metal container, comprising a step of choosing a MgO-C brick whose test piece shows permeability of not lower than 10.0×10msubsequent to repeating processes of heating a test piece of the MgO-C brick up to 1600°C, keeping the test piece at 1600°C for 3 hours, slowly cooling the test piece down to 500°C, and keeping the test piece at 500°C for 3 hours, 10 times under a reduction atmosphere, and a step of choosing a MgO-C brick according to its apparent porosity subsequent to reduction calcination.SELECTED DRAWING: Figure 2
【課題】ＭｇＯ−Ｃれんがを間欠操業を行う溶融金属容器の内張り構造に用いる場合に良好な耐用性を得る。【解決手段】間欠操業を行う溶融金属容器の内張り構造に用いられるＭｇＯ−Ｃれんがの選定方法であって、ＭｇＯ−Ｃれんがの試験片を１６００℃まで加熱する工程、試験片を１６００℃で３時間保持する工程、試験片を５００℃まで徐冷する工程、および試験片を５００℃で３時間保持する工程を、還元雰囲気下で１０回繰り返した後に、試験片の通気率が１０．０×１０−１５ｍ２以上であるＭｇＯ−Ｃれんがを選定するステップと、還元焼成後の見掛け気孔率に基づいてＭｇＯ−Ｃれんがを選定するステップとを含む、ＭｇＯ−Ｃれんがの選定方法が提供される。【選択図】図２
METHOD OF CHOOSING MgO-C BRICK, METHOD OF OPERATING MOLTEN METAL CONTAINER, AND LINING STRUCTURE OF MOLTEN METAL CONTAINER
ＭｇＯ−Ｃれんがの選定方法、溶融金属容器の操業方法、および溶融金属容器の内張り構造
KAMIKO HIROMI (author)
2019-01-17
Patent
Electronic Resource
Japanese
IPC:
C04B
Kalk
,
LIME
/
B22D
CASTING OF METALS
,
Gießen von Metallen
/
F27D
Einzelheiten oder Zubehör für Industrieöfen, Schachtöfen, Brennöfen oder Retorten, soweit sie nicht auf eine Ofenart eingeschränkt sind
,
DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
REFRACTORY BRICK AND MOLTEN-METAL CONTAINER USING THE SAME
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European Patent Office | 2018