の基本的な紹介 refractory clay bricks

Clay bricks refer to clay products with Al2O3 content of 30%-40% aluminum silicate materials. Clay bricks are made of 50% soft clay and 50% hard clay clinker, which are batched according to certain particle size requirements. After molding and drying, they are fired at a high temperature of 1300~1400℃. The mineral composition of clay bricks is mainly kaolinite (Al2O3·2SiO2·2H2O) and 6%~7% impurities (oxides of potassium, sodium, calcium, titanium, and iron). The firing process of clay bricks is mainly the process of continuous dehydration and decomposition of kaolin to form mullite (3Al2O3·2SiO2) crystals. The SiO2 and Al2O3 in the clay brick form eutectic low-melting silicate with impurities during the firing process, which surrounds the mullite crystals.

粘土レンガは弱酸性の耐火物であり、酸性スラグや酸性ガスの侵食に耐えることができ、アルカリ性物質に対する耐性がわずかに弱くなります。 粘土れんがは優れた熱特性を持ち、急速な低温と急速な熱に耐性があります。