　　High-strength mullite casting material is a high-performance Casting material made of high-quality mullite aggregate, plus fine powder and additives. It has the advantages of good thermal shock stability, good structure, low creep rate, small thermal expansion and strong resistance to chemical erosion, etc., and can effectively extend the service life of the furnace lining. The curing, demolding and baking time is short, and it is not easy to burst; it is widely used in small and medium-sized cement kiln pre-decomposition kiln, front kiln mouth, coal injection pipe, low wall of cooler and other parts, and has excellent results. According to the physical and chemical indicators, it is divided into three brands: JC-80MC, JC-70MC and JC-65MC.

Physical and chemical indicators of general purpose Clay brick:

Item		JC-80MC	JC-70MC	JC-65MC
Al2O3 + SIO2 % ≥		80	70	65
Bulk Density(110 ℃×24h) g/cm³ ≥		2.9	2.75	2.45
Compressive strength at room temperature Mpa ≥	110 ℃×24h	100	100	80
Compressive strength at room temperature Mpa ≥	1100 ℃×3h	120	110	90
Flexural strength at room temperature Mpa ≥	110 ℃×24h	12	10	8
Flexural strength at room temperature Mpa ≥	1100 ℃×3h	14	12	9
Permanent line change rate（ 1100 ℃×3h） % ≤		±0.3	±0.3	±0.5
Maximum use temperature ℃		1600	1600	1500

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