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Bentonite



 
BENTONITE
 
FORMULA: (Mg-Ca)O-Al2O3-5SiO2-nH2O
 
CAS NO.: 1302-78-9
 
GRADE: SODIUM TYPE
 
DESCRIPTION: POWDER. RELATIVE DENSITY IS AROUND 2, MELTING POINT IS 1330--1430℃.
 
SPECIFICATIONS:
 
ITEM
GRADE 1
GRADE 2
ABSORBING METHYLENE-BLUE VALUE (g/100g)
32 MIN.
32 MIN.
GELATINE (ml/15g)
500
400
EXPANDED MULTIPLE (ml/g)
50 MIN.
20 MIN.
WET PRESS STRENGTH (kpa)
50 MIN.
40 MIN.
HEAT-WET TENSILE STRENGTH (kpa)
3.0
2.0
PH VALUE
8.0-9.5
8.0-9.5
MOISTURE
10% MAX.
10% MAX.
FINENESS (THOUGH 200 MESH)
95% MIN.
95% MIN.
 
USES: used to be the foundry sand binder in cast iron and cast steal's mixed mould, surface dry mould, fired mould and pressure moulding.
 
PACKING: PACKED IN 25KG/50KG/1000KG NET BAG. 
 
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