Iron trough castable

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Iron trough castable

The series of castables for the tapping chute is designed for different parts of the tapping chute of large and medium-sized blast furnaces and the use conditions. It adopts the principle of low cement and ultra-low cement castables, and uses different types of corundum and silicon carbide as the main raw materials. A combination of a variety of ultra-fine powders, additives and binders; it has the characteristics of low water addition, good fluidity, high strength, erosion resistance, oxidation resistance and excellent high stability. Suitable for large and medium blast furnaces with two tapping channels. The one-time iron output can reach about 200,000 tons.

Performance index of castable for iron trough：

Physical and chemical index		TJ-11A	TJ-11B	TJ-12A	TJ-12B	TJ-13
chemical composition　（%）≥	AL₂O₃	80	65	70	60	80
chemical composition　（%）≥	SiC	10	20	10	20	10
Volume Density（g/cm³）	110℃×24h	3	2.8	2.8	2.65	2.9
Volume Density（g/cm³）	1450℃×3h	2.9	2.7	2.7	2.6	2.8
Flexural strength at room temperature　（MPa） ≥	110℃×24h	10	6	8	4	8
Flexural strength at room temperature　（MPa） ≥	1450℃×3h	10	10	10	6	10
cold compressive strength　（MPa） ≥	110℃×24h	50	30	30	20	50
cold compressive strength　（MPa） ≥	1450℃×3h	70	50	60	40	80
Heating permanent linear change rate（%）	1450℃×3h	0～0.5	0～0.5	0～0.5	0～0.5	0～0.5
Application		Main channel castable		Branch pouring material		swing chute
Application		Molten iron wire	Slag line	Iron ditch	Slag runner	swing chute