S. S. KHARDEKAR INDIA PVT. LTD.
Manufacturer of various foundry products
Auxiliary Products » Chilling Compund – Chromite Sand
CHILLING COMPOUND - CHROMITE SAND
DESCRIPTION :
CHILLING COMPOUND is Chromite Sand used in the foundry industry originates in South Africa.
PHENOMENON OF EXPANSION :
When Slag Coagulant comes in contact with the metal, it reacts with the slag & starts coagulation i.e. formation of spongy agglomeration. The Coagulation depends on Expansion of Granules.
CHEMICAL COMPOSITION :
Cr2O3: 45-47%, SiO2: 1% Max., Fe2O3: 27-29%, Al2O3: 14.5%, CaO: 0.18 typical, Max 0.2%,
MgO: 10.2 Typical & max. 11%, TiO2: 0.69%, V2O5: 0.34%, P: 0.0029%, S: 0.0029%, Cr:Fe ratio: 1.58:1
PHYSICAL PROPERTIES :
Bulk density: 155-165 lbs/cu.ft
AFS No.: 40-50
ADVANTAGES:
- It is having 45-47% Chromic Oxide & max.1% Silica & offers higher chilling properties and reduces burn on sand.
- Turbidity should be less than 250 ppm reduces the amount of resin needed to maintain tensile strength & the permeability of the sand.
- An ADV at pH 7 <5 offers less molding sands work and higher tensile strengths.
- In a PUCB system, low ADV will offer the resin/sand mix to become more compact and offers high tensile strengths.