Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Low-heat-conductivity repairing material for permanent layer of steel ladle and preparation method of low-heat-conductivity repairing material
The invention relates to a low-heat-conductivity repairing material for a permanent layer of a steel ladle. The low-heat-conductivity repairing material comprises the following raw materials in percentage by weight: 15-25% of calcium hexaluminate aggregate with the particle size of more than or equal to 1 mm and less than 3 mm, 15-25% of calcium hexaluminate aggregate with the particle size of more than or equal to 0.1 mm and less than 1 mm, 30-45% of calcium hexaluminate fine powder with the particle size of less than or equal to 0.074 mm, 5-10% of alpha-Al2O3 micro powder with the particle size of less than or equal to 20 microns, 0.05-0.3% of acrylic chopped fiber, 1-3% of a coagulator and 5-25% of sodium polyacrylate. The preparation method comprises the following steps: uniformly stirring and mixing the raw materials except the sodium polyacrylate and the coagulant; adding sodium polyacrylate, stirring, sealing and storing; before use, the coagulant is added and uniformly stirred to be used for repairing. According to the repairing material with calcium hexaluminate as the main raw material, the repairing problem of the permanent layer of the steel ladle is solved, the heat number can be increased to be not lower than 1100 from the original heat number not higher than 1020, the heat conductivity coefficient of the repairing material is reduced to be about 0.65 w/(m.k) from 1.0 w/(m.k), the temperature drop amplitude of molten steel is 3-7 DEG C, and the cost of per ton of steel is saved by 4-15 yuan.
一种用于钢包永久层低导热修补料，其原料组成及wt％：粒度为≥1mm至＜3mm的六铝酸钙骨料：15～25％，粒度≥0.1mm至＜1mm六铝酸钙骨料：15～25％，粒度≤0.074mm的六铝酸钙细粉：30～45％，粒度≤20μm的α‑Al2O3微粉：5～10％，腈纶短切纤维：0.05～0.3％，促进凝固剂：1～3％，聚丙烯酸钠：5～25％；制备方法：将除聚丙烯酸钠及促进凝固剂以外的组成原料搅拌混合均匀；将聚丙烯酸钠加入并搅拌后密封保存；在使用前将促进凝固剂加入搅拌均匀后即可用于修补。本发明通过以六铝酸钙为主原料的修补料，解决钢包永久层的修补问题，可由原来的不高于1020炉次增加至不低于1100炉次，其导热系数由1.0w/(m·k)降低到0.65w/(m·k)左右，钢水温降幅度3‑7℃，吨钢成本节约4‑15元。
Low-heat-conductivity repairing material for permanent layer of steel ladle and preparation method of low-heat-conductivity repairing material
The invention relates to a low-heat-conductivity repairing material for a permanent layer of a steel ladle. The low-heat-conductivity repairing material comprises the following raw materials in percentage by weight: 15-25% of calcium hexaluminate aggregate with the particle size of more than or equal to 1 mm and less than 3 mm, 15-25% of calcium hexaluminate aggregate with the particle size of more than or equal to 0.1 mm and less than 1 mm, 30-45% of calcium hexaluminate fine powder with the particle size of less than or equal to 0.074 mm, 5-10% of alpha-Al2O3 micro powder with the particle size of less than or equal to 20 microns, 0.05-0.3% of acrylic chopped fiber, 1-3% of a coagulator and 5-25% of sodium polyacrylate. The preparation method comprises the following steps: uniformly stirring and mixing the raw materials except the sodium polyacrylate and the coagulant; adding sodium polyacrylate, stirring, sealing and storing; before use, the coagulant is added and uniformly stirred to be used for repairing. According to the repairing material with calcium hexaluminate as the main raw material, the repairing problem of the permanent layer of the steel ladle is solved, the heat number can be increased to be not lower than 1100 from the original heat number not higher than 1020, the heat conductivity coefficient of the repairing material is reduced to be about 0.65 w/(m.k) from 1.0 w/(m.k), the temperature drop amplitude of molten steel is 3-7 DEG C, and the cost of per ton of steel is saved by 4-15 yuan.
一种用于钢包永久层低导热修补料，其原料组成及wt％：粒度为≥1mm至＜3mm的六铝酸钙骨料：15～25％，粒度≥0.1mm至＜1mm六铝酸钙骨料：15～25％，粒度≤0.074mm的六铝酸钙细粉：30～45％，粒度≤20μm的α‑Al2O3微粉：5～10％，腈纶短切纤维：0.05～0.3％，促进凝固剂：1～3％，聚丙烯酸钠：5～25％；制备方法：将除聚丙烯酸钠及促进凝固剂以外的组成原料搅拌混合均匀；将聚丙烯酸钠加入并搅拌后密封保存；在使用前将促进凝固剂加入搅拌均匀后即可用于修补。本发明通过以六铝酸钙为主原料的修补料，解决钢包永久层的修补问题，可由原来的不高于1020炉次增加至不低于1100炉次，其导热系数由1.0w/(m·k)降低到0.65w/(m·k)左右，钢水温降幅度3‑7℃，吨钢成本节约4‑15元。
Low-heat-conductivity repairing material for permanent layer of steel ladle and preparation method of low-heat-conductivity repairing material
一种用于钢包永久层低导热修补料及制备方法
XU GUOTAO (Autor:in) / ZHANG HONGLEI (Autor:in) / LIU LI (Autor:in) / ZHOU WANGZHI (Autor:in)
25.06.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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