Castable for launders in blast furnaces

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1000

Castable for launders in blast furnaces

　　The main raw materials of castable and ramming mass for launders in blast furnaces are super bauxite, corundum, SiC, etc., and pure calcium aluminate cement and ultrafine powder are binding agents with antioxidants and anti-burst agents as additives. It features good anti-scour anti-erosion, convenient construction, quick baking and long service life. The main construction methods are vibration pouring, gravity pouring and ramming.

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Amorphous metallurgical material

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Parameters

Blast Furnace Castables

Blast furnace tap ditch castable, the physical and chemical indicators are shown in the following table:

brand No.		TGJ-50	TGJ-60	TGJ-70
Al2O3 ; %		≥50	≥60	≥70
SiC+C %		≥12	≥15	≥15
CaO %		≤1.5	≤1.5	≤1.5
Bulk Density g/cm3	110℃×24h	≥2.5	≥2.6	≥2.7
Room temperature compressive strength MPa	110℃×24h	≥30	≥40	≥40
Room temperature compressive strength MPa	1450℃×3h	≥40	≥45	≥45
Room temperature flexural strength MPa	110℃×24h	≥4	≥5	≥5
Room temperature flexural strength MPa	1450℃×3h	≥6	≥7	≥7
Reburn line changes %	1450℃×3h	±0.5	&n