Special magnesia carbon brick for steel ladle bottom and preparation method of brick

• Main Authors: ZHOU XIUWEI, NIU SHUANG, HOU ZEYU
• Format: Patent
• Language: Chinese; English
• Published: 12.11.2019
• Subjects: ARTIFICIAL STONE; CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; METALLURGY; PERFORMING OPERATIONS; POWDER METALLURGY; REFRACTORIES; SLAG; TRANSPORTING; TREATMENT OF NATURAL STONE

The invention provides a special magnesia carbon brick for a steel ladle bottom. The magnesia carbon brick is prepared from the following materials, in parts by weight: 60-75 parts of fused magnesia,10-20 parts of magnesia fine powder, 5-15 parts of graphite, 2-6 parts of aluminum oxide, and 1-4 parts of an additive, wherein the fused magnesia comprises 10-40 parts of a granular material with a particle size of 3-5 mm, 5-30 parts of a granular material with a particle size of 1-3 mm and 10-20 parts of a granular material with a particle size of <=1 mm; and a total amount is 100 parts; and themagnesia carbon brick further comprises a binder with a weight of 3.0-3.2% of a total weight of the materials. The aluminum-magnesium carbon brick provided by the invention has a low thermal expansion coefficient, good thermal stability, good thermal strength, a lower carbon content, good slag corrosion resistance and long service life, and can satisfy a steel ladle refining process. 本发明提供一种钢包包底专用镁碳砖，是由电熔镁砂、镁砂细粉、石墨、氧化铝、添加