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.
HS.NO.: 2508.1000