Unshaped refractory material

Patent metadata

Field	Value
Publication number	US-2017081244-A1
Application number	US-201415123025-A
Country	US
Kind code	A1
Filing date	Mar 3, 2014
Priority date	Mar 3, 2014
Publication date	Mar 23, 2017
Grant date	—

Abstract

In order to address the technical problem of allowing an unshaped refractory material using a spinel-containing alumina cement to provide further improved corrosion resistance and slag infiltration resistance while reducing the occurrence of crack/peeling, an unshaped refractory material is provided which comprises a refractory raw material mixture having a particle size of 8 mm or less, with the refractory raw material mixture having an alumina cement at least a part of which is a spinel-containing alumina cement, and, with respect to 100 mass % of the refractory raw material mixture, the alumina cement contains CaO in an amount of 0.5 to 2.5 mass %, and the spinel-containing alumina cement contains spinel in an amount of 3.5 to 10.5 mass %.

First claim

1 . An unshaped refractory material comprising a refractory raw material mixture having a particle size of 8 mm or less, the refractory raw material mixture comprising an alumina cement at least a part of which is a spinel-containing alumina cement, wherein, with respect to 100 mass % of the refractory raw material mixture, the alumina cement contains CaO in an amount of 0.5 to 2.5 mass %, and the spinel-containing alumina cement contains spinel in an amount of 3.5 to 10.5 mass %.

2 . The unshaped refractory material of claim 1 , wherein the refractory raw material mixture further comprises a spinel raw material having a particle size of 0.1 mm or less, and wherein a total content of the spinel raw material and the spinel contained in the spinel-containing alumina cement is in the range of 5.5 to 22 mass %, with respect to 100 mass % of the refractory raw material mixture.

3 . The unshaped refractory material of claim 1 , wherein the refractory raw material mixture further comprises a magnesia raw material having a particle size of 0.1 mm or less, and wherein a content of the magnesia raw material is in the range of 2 to 9 mass %, with respect to 100 mass % of the refractory raw material mixture.

4 . The unshaped refractory material of claim 1 , wherein the refractory raw material mixture further comprises calcined alumina having a particle size of 3 μm or less, and wherein a content of the calcined alumina is 10 mass % or less, with respect to 100 mass % of the refractory raw material mixture.

5 . The unshaped refractory material of claim 1 , wherein the refractory raw material mixture further comprises calcined alumina having a particle size of 3 μm or less, and wherein a content of the calcined alumina is less than 4 mass %, with respect to 100 mass % of the refractory raw material mixture.

6 . The unshaped refractory material of claim 1 , wherein the refractory raw material mixture further comprises at least one of an alumina raw material and a spinel raw material each having a particle size of greater than 0.1 mm to 8 mm, and wherein a total content of the at least one of the alumina raw material and the spinel raw material is in the range of 50 to 75 mass %, with respect to 100 mass % of the refractory raw material mixture.

7 . The unshaped refractory material of claim 2 , wherein the refractory raw material mixture further comprises calcined alumina having a particle size of 3 μm or less, and wherein a content of the calcined alumina is 10 mass % or less, with respect to 100 mass % of the refractory raw material mixture.

8 . The unshaped refractory material of claim 3 , wherein the refractory raw material mixture further comprises calcined alumina having a particle size of 3 μm or less, and wherein a content of the calcined alumina is 10 mass % or less, with respect to 100 mass % of the refractory raw material mixture.

9 . The unshaped refractory material of claim 2 , wherein the refractory raw material mixture further comprises calcined alumina having a particle size of 3 μm or less, and wherein a content of the calcined alumina is less than 4 mass %, with respect to 100 mass % of the refractory raw material mixture.

10 . The unshaped refractory material of claim 3 , wherein the refractory raw material mixture further comprises calcined alumina having a particle size of 3 μm or less, and wherein a content of the calcined alumina is less than 4 mass %, with respect to 100 mass % of the refractory raw material mixture.

11 . The unshaped refractory material of claim 2 , wherein the refractory raw material mixture further comprises at least one of an alumina raw material and a spinel raw material each having a particle size of greater than 0.1 mm to 8 mm, and wherein a total content of the at least one of the alumina raw material and the spinel raw material is in the range of 50 to 75 mass %, with respect to 100 mass % of the refractory raw material mixture.

12 . The unshaped refractory material of claim 3 , wherein the refractory raw material mixture further comprises at least one of an alumina raw material and a spinel raw material each having a particle size of greater than 0.1 mm to 8 mm, and wherein a total content of the at least one of the alumina raw material and the spinel raw material is in the range of 50 to 75 mass %, with respect to 100 mass % of the refractory raw material mixture.

13 . The unshaped refractory material of claim 4 , wherein the refractory raw material mixture further comprises at least one of an alumina raw material and a spinel raw material each having a particle size of greater than 0.1 mm to 8 mm, and wherein a total content of the at least one of the alumina raw material and the spinel raw material is in the range of 50 to 75 mass %, with respect to 100 mass % of the refractory raw material mixture.

14 . The unshaped refractory material of claim 5 , wherein the refractory raw material mixture further comprises at least one of an alumina raw material and a spinel raw material each having a particle size of greater than 0.1 mm to 8 mm, and wherein a total content of the at least one of the alumina raw material and the spinel raw material is in the range of 50 to 75 mass %, with respect to 100 mass % of the refractory raw material mixture.

Assignees

• Krosakiharima Corp

Inventors

• Goda Koji
• Sasatani Yoshihiro
• Uemura Koichi

Classifications

• C04B35/1015

  containing refractory metal compounds other than those covered by C04B35/103 - C04B35/106 · CPC title

• C04B2235/5427

  millimeter or submillimeter sized, i.e. larger than 0,1 mm · CPC title

• C04B2235/3206

  Magnesium oxides or oxide-forming salts thereof · CPC title

• C04B2235/5445

  submicron sized, i.e. from 0,1 to 1 micron · CPC title

• C04B2235/3208

  Calcium oxide or oxide-forming salts thereof, e.g. lime · CPC title