Perlite Ore is used in many Ferrous and Non-ferrous foundries as a " slag coagulant". It is used in ladle topping where granulated perlite ore is added to molten metal pouring ladles. the ore reacts with the slag in the ladle to allow easy removal of the slag layer.   Expanded perlite forms an efficient insulating blanket in cases where it is desirable to maintain a metal temperature in the ladle. When it is introduced during ladle filling, a gentle rolling motion is produced which cleanses the metal by coagulating impurities. In addition, ladle- lining life is increased by virtue of a vitreous residual coating left on the refractory by the perlite

 

Perlite in the ore form is used in high temperature applications in the steel, ferrous and non-ferrous industries, as a slag coagulation agent, in ladle topping compounds, as an ingredient in exothermic and insulating sleeves and as a cushioning

1.Perlite ore Size

12-16mesh, 14-20mesh, 16-32mesh, 20-40mesh, 30-50mesh, 50-150mesh, 200-325 mesh 1-3mm 3-5mm 0.3-0.6mm 1-2.8mm 0.8-2.5mm,0.3-1mm,2-4mm etc  

2.Physical and Chemical Properties:

 

Element	SiO2	Al2O3	Na2O	K2O	Fe2O3
Content	69.47-75.43%	12.53-15.19%	2.51-4.57%	1.39-4.97%	0.39-2.36%
Element	CaO	MgO	FeO	H2O	Impurity
Content	0.97-1.67%	0.40-0.96%	0.36-1.57%	≤1%	≤0.5%

 

Expansion ratios	Hardness	Specific gravity(g/cm3)	Expanded temperature\(°C)	Setting time(Seconds)
≥8.39	5.0-7	1.2-1.4	900-1000	5-10

 

3.Raw perlite ore for foundry applications:

Cast iron ,cast steel,cast stainless steel,cast aluminium, cast coppe
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