A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
CAST REFRACTORY
PROBLEM TO BE SOLVED: To provide a cast refractory excellent in spalling resistance, preventing occurrence of crack by inhibiting the deterioration of strength in a low temperature area of about 600°C caused by the shape of a long columnar refractory aggregate in the cast refractory prepared by using such an aggregate, and capable of desirably using for lining of a molten metal vessel.SOLUTION: There is provided a cast refractory adding exclusively to 100 mass% of a refractory compound, (A) 5-25 mass% of a long columnar refractory aggregate, having a nearly round cross-sectional shape, a maximum cross-sectional diameter of 5-20 mm, an aspect ratio defined as (an axial length/maximum cross-sectional diameter) of 2-5, and a flexural strength measured based on JIS R1601 of 60 MPa or higher, and (B) 1-10 mass% of a metallic fiber having the maximum cross-sectional diameter of 0.2-1.5 mm and the length of 20-35 mm.SELECTED DRAWING: Figure 1
【課題】長柱状耐火性骨材を使用した流し込み耐火物において、長柱状耐火性骨材の形状に起因する600℃付近の低温度域での強度の低下を抑制することにより亀裂の発生を防止し、溶融金属容器の内張りに好ましく使用できる耐スポーリング性に優れた流し込み耐火物を提供する。【解決手段】耐火性配合物100質量％に対して、(A)断面形状がほぼ円形で、断面最大径が5〜20 mmかつ軸方向の長さ/断面最大径で規定されるアスペクト比が2〜5であり、JIS R1601に準じて測定した曲げ強度が60 MPa以上である長柱状耐火性骨材を5〜25質量％、及び(B)断面最大径が0.2〜1.5 mmかつ長さが20〜35 mmである金属ファイバーを1〜10質量％をそれぞれ外掛け添加した流し込み耐火物。【選択図】図１
CAST REFRACTORY
PROBLEM TO BE SOLVED: To provide a cast refractory excellent in spalling resistance, preventing occurrence of crack by inhibiting the deterioration of strength in a low temperature area of about 600°C caused by the shape of a long columnar refractory aggregate in the cast refractory prepared by using such an aggregate, and capable of desirably using for lining of a molten metal vessel.SOLUTION: There is provided a cast refractory adding exclusively to 100 mass% of a refractory compound, (A) 5-25 mass% of a long columnar refractory aggregate, having a nearly round cross-sectional shape, a maximum cross-sectional diameter of 5-20 mm, an aspect ratio defined as (an axial length/maximum cross-sectional diameter) of 2-5, and a flexural strength measured based on JIS R1601 of 60 MPa or higher, and (B) 1-10 mass% of a metallic fiber having the maximum cross-sectional diameter of 0.2-1.5 mm and the length of 20-35 mm.SELECTED DRAWING: Figure 1
【課題】長柱状耐火性骨材を使用した流し込み耐火物において、長柱状耐火性骨材の形状に起因する600℃付近の低温度域での強度の低下を抑制することにより亀裂の発生を防止し、溶融金属容器の内張りに好ましく使用できる耐スポーリング性に優れた流し込み耐火物を提供する。【解決手段】耐火性配合物100質量％に対して、(A)断面形状がほぼ円形で、断面最大径が5〜20 mmかつ軸方向の長さ/断面最大径で規定されるアスペクト比が2〜5であり、JIS R1601に準じて測定した曲げ強度が60 MPa以上である長柱状耐火性骨材を5〜25質量％、及び(B)断面最大径が0.2〜1.5 mmかつ長さが20〜35 mmである金属ファイバーを1〜10質量％をそれぞれ外掛け添加した流し込み耐火物。【選択図】図１
CAST REFRACTORY
流し込み耐火物
SATO MASAHARU (author) / TSUTSUI YUJI (author) / UMEMOTO KOTARO (author) / NISHIJIMA FUMIHARU (author) / OKUNO HIROHIDE (author) / NAKANO TAKANORI (author) / OBA YASUHIRO (author)
2016-06-20
Patent
Electronic Resource
Japanese