Microspheres for ‌insulated riser‌ - Yanheal 380

Composite insulating risers are mainly composed of closed-cell perlite, siderite, bentonite, ferrous sulfate, and brine binder. Closed-cell perlite has low thermal conductivity and heat storage coefficient, reducing heat loss in the riser, prolonging the solidification time of the molten metal in the riser, and improving the feeding capacity.