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Fire Clay Brick

The high alumina is divided into different kinds according to the alumina content and usage, they are widely used in glass furnace, metallurgy, electric furnace, cement kiln and other heat-engineering equipments.

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Fire Clay Brick＆ High Alumina Brick

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Fire Clay Brick

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项目 Items	理化指标 Physical and Chemical Specifications
	三低粘土砖 Three Low Clay Brick	低气孔粘土砖 Low Porosity Clay Brick			普通粘土砖 Common Clay Brick
	DDD	DN-12	DN-15	DN-17	N-1	N-2a
Al2O3 %	≥46	≥45	≥42	≥40	≥42	≥40
Fe2O3 %	≤1.1	≤1.2	≤1.5	≤2.0	≤1.8	≤2.2
显气孔率 Apparent Porosity %	≤10	≤12	≤15	≤17	≤22	≤24
体积密度g/cm³ Bulk Density	≥2.4	≥2.37	≥2.3	≥2.25	≥2.15	≥2.1
常温耐压强度MPa Cold Crushing Strength	70	70	60	50	30	25
重烧线变化 1400℃×2h Variation of Re-Burning Line	—	-0.1/+0.05	-0.2/+0.0	-0.3/+0.0	-0.4/+0.1	-0.5/+0.1
0.2MPa荷重软化温度 ℃ Refractoriness Under Load 0.2MPa	≥1520	≥1500	≥1470	≥1420	≥1400	≥1350