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To provide highly durable castable refractory with suppressed peeling wear.SOLUTION: A castable refractory, which comprises 4.0 to 8.0 mass% of MgO refractory raw material, 0.5 to 1.0 mass% of SiOrefractory raw material, and balance of refractory raw material consisting of AlOand unavoidable components, of which 0.5 to 3.0 mass%, based on the total of 100 mass% of the refractory raw materials, of the MgO refractory raw material is MgO powder having a maximum particle diameter of 1 μm or less, and of which 2.0 to 10.0 mass%, based on the total of 100 mass% of the refractory raw materials, of AlOrefractory raw material is AlOpowder having a maximum particle diameter of 1 μm or less, wherein the castable refractory further contains 0.10 to 1.00 mass% of a polyvalent metal salt of an oxycarboxylic acid and 0.9 to 1.8 mass% of hydroxyapatite having a maximum particle size of 10 μm or less, in which the amounts of the polyvalent metal salt and the amount of the hydroxyapatite are based on the total of 100 mass% of the refractory raw materials without including the oxycarboxylic acid and the hydroxyapatite, and wherein the castable refractory does not contain alumina cement.SELECTED DRAWING: Figure 3
【課題】剥離損耗を抑制した耐用性に優れたキャスタブル耐火物を提供する。【解決手段】４．０〜８．０質量％のＭｇＯ質耐火原料と、０．５〜１．０質量％のＳｉＯ２質耐火原料と、残部としてＡｌ２Ｏ３質耐火原料及び不可避成分からなる耐火原料とを含有し、耐火原料の合計１００質量％基準でＭｇＯ質耐火原料のうち０．５〜３．０質量％は最大粒子径１μｍ以下のＭｇＯ粉体であり、耐火原料の合計１００質量％基準でＡｌ２Ｏ３質耐火原料のうち２．０〜１０．０質量％は最大粒子径１μｍ以下のＡｌ２Ｏ３粉体であり、耐火原料の合計１００質量％に対して、外掛けで０．１０〜１．００質量％のオキシカルボン酸の多価金属塩及び外掛けで０．９〜１．８質量％の最大粒子径が１０μｍ以下のヒドロキシアパタイトをさらに含有し、アルミナセメントを含有しない、ことを特徴とするキャスタブル耐火物。【選択図】図３
To provide highly durable castable refractory with suppressed peeling wear.SOLUTION: A castable refractory, which comprises 4.0 to 8.0 mass% of MgO refractory raw material, 0.5 to 1.0 mass% of SiOrefractory raw material, and balance of refractory raw material consisting of AlOand unavoidable components, of which 0.5 to 3.0 mass%, based on the total of 100 mass% of the refractory raw materials, of the MgO refractory raw material is MgO powder having a maximum particle diameter of 1 μm or less, and of which 2.0 to 10.0 mass%, based on the total of 100 mass% of the refractory raw materials, of AlOrefractory raw material is AlOpowder having a maximum particle diameter of 1 μm or less, wherein the castable refractory further contains 0.10 to 1.00 mass% of a polyvalent metal salt of an oxycarboxylic acid and 0.9 to 1.8 mass% of hydroxyapatite having a maximum particle size of 10 μm or less, in which the amounts of the polyvalent metal salt and the amount of the hydroxyapatite are based on the total of 100 mass% of the refractory raw materials without including the oxycarboxylic acid and the hydroxyapatite, and wherein the castable refractory does not contain alumina cement.SELECTED DRAWING: Figure 3
【課題】剥離損耗を抑制した耐用性に優れたキャスタブル耐火物を提供する。【解決手段】４．０〜８．０質量％のＭｇＯ質耐火原料と、０．５〜１．０質量％のＳｉＯ２質耐火原料と、残部としてＡｌ２Ｏ３質耐火原料及び不可避成分からなる耐火原料とを含有し、耐火原料の合計１００質量％基準でＭｇＯ質耐火原料のうち０．５〜３．０質量％は最大粒子径１μｍ以下のＭｇＯ粉体であり、耐火原料の合計１００質量％基準でＡｌ２Ｏ３質耐火原料のうち２．０〜１０．０質量％は最大粒子径１μｍ以下のＡｌ２Ｏ３粉体であり、耐火原料の合計１００質量％に対して、外掛けで０．１０〜１．００質量％のオキシカルボン酸の多価金属塩及び外掛けで０．９〜１．８質量％の最大粒子径が１０μｍ以下のヒドロキシアパタイトをさらに含有し、アルミナセメントを含有しない、ことを特徴とするキャスタブル耐火物。【選択図】図３
CASTABLE REFRACTORY
キャスタブル耐火物
MATSUI TSUYOSHI (author)
2020-04-02
Patent
Electronic Resource
Japanese
IPC:
C04B
Kalk
,
LIME
/
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
CASTABLE REFRACTORY COMPOSITION, CASTABLE REFRACTORY, AND METHOD OF PRODUCING CASTABLE REFRACTORY
| European Patent Office | 2022