Cement castings with low and ultra-low cement content

Cement castings with low and ultra-low cement content have the following characteristics, how small the pore size is, high density, good volume stability, high strength and small amount of water. They overcome characteristics, in which the strength of conventional castings is significantly reduced at temperature 800 ~ 1200 ℃, increases with temperature, and have excellent thermal shock resistance, slag resistance and corrosion resistance.

Physical and chemical indicators

Subject		Index
Subject		Clay	High alumina content	Corundum
Al₂O₃ %		≥45	≥75	≥98
CaO %		＜1.8	＜1.5	＜1.0
Bulk density g/cm³	110℃×24h	≥2.3	≥2.6	≥3.1
	1350℃×3h	≥2.26	≥2.61	/
	1550℃×3h	/	/	≥3.00
Cold crush strength MPa	110℃×24h	≥70	≥75	≥85
	1350℃×3h	≥85	≥90	/
	1550℃×3h	/	/	≥100
Flexural strengthMPa	110℃×24h	≥6	≥8	≥9
	1350℃×3h	≥8	≥9	/
	1550℃×3h	/	/	≥11
Constant linear rate of change %	1000℃×3h	-0.3	-0.2	-0.2
	1350℃×3h	±0.3	±0.5	/
	1550℃×3h	/	/	±0.5
Maximum operating temperature ℃		1450	1600	1800

Characteristics of low and ultra-low cement cement castings

High fire resistance, resistance to high and low temperature influences
Erosion resistance, impact resistance, high wear resistance, high strength
High ductility, can be cast into any shape
Good air tightness, reduces heat loss and saves energy

Advantages of cement castings with low and ultra-low cement content

Cement castings with low and ultra-low cement content have high cohesive strength, long time of initial setting and operation of the structure, rapid increase in strength, high impermeability, do not require acid treatment, easily ensure compactness of ash gaps in masonry and can significantly improve the lining of a blast furnace, tightness of walls and anti-corrosion ability of lining.

Scope of injection molding

Cement castings with low and ultra-low cement content can be used in the steel industry, petrochemical industry, metallurgical industry and power plants with wide application and few restrictions.