|
items\Type |
Sodium Base Bentonite |
Calcium Base Bentonite | |
|
First grade |
Second grade | ||
|
Methyl blue g/100g ≥ |
32 |
32 |
30 |
|
Colloid value ml/15g ≥ |
500 |
400 |
48 |
|
Swelling value ml/g ≥ |
50 |
20 |
10 |
|
PH value |
8.0-9.5 |
8.0-9.5 |
6.5-7.5 |
|
Wet pressure strength Kpa ≥ |
50 |
40 |
30 |
|
Hot wet tension strength Kpa ≥ |
3.0 |
2.0 |
1.5 |
|
Moisture% ≤ |
10 |
10 |
10 |
|
Finess pass 200mesh screen≥ |
95 |
95 |
95 |
|
Pakage |
25kg50kg1000kg | ||
Our foundry bentonite applied to the wet type, dry type, high-pressure type such as a different process cast steel, cast iron production. Main features are:
1. by adding small quantities, high intensity;
2.good air permeability;
3. hot wet tensile strength of high ability of anti-coarse;
4. heat is good;
5. a good reusability. Used as core sand binder, sand can have a good process performance, improve casting surface finish to ensure the casting quality, increase yield. In recent years, the company has developed and produced a new type of sodium bentonite and bentonite casting efficiency with superior integrated process performance, is the ideal binder for foundry sand.