Origin	China
Model Number	Bentonite of Calcium

The sodium and calcium-base bentonite are used as the sand binder in green molding, surface drying molding, dried molding and pressure molding in cast iron and cast steel, which have a high strength high ore-carrying-resistance, high-temperature resistance and good repeatable-utilization, improve the surface finish and dimensional precision of castings, and reduce ratio of rejects. Especially the sodium-base bentonite as the mould sand binder has incomparable merits.

Metallurgical bentonite pellet quality indicators

project	Sodium Bentonite			Ca-bentonite
	Grade	2 items	Three Goods	Grade	2 items	Three Goods
Water absorption (2h) /% ≥	400	300	200	200	160	120
Blue absorption capacity/(g/100g) ≥	30	26	22	30	26	22
Swelling Index/(mL/2g) ≥	15			5
Sieving ratio (75μm, dry sieving), mass fraction /%≥	98	95	95	98	95	95
Water (105 ° C). Mass fraction /%	9-13			9-13