Foundry Bentonite Grade

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Bentonite used in the foundry industry has a specific grade. Foundry bentonite supplied by Romak has high-quality from the best mines.

Foundry bentonite Description:

Foundry is the oldest technique developed by humans and green sand casting is the most common technique, especially for ferrous castings. Also, it is recommended for use in steel and other alloy castings.

Typical Physical Properties of Foundry bentonite:

Sr. No.	Parameters
1	Moisture Content (%)	11 – 13%
2	Free Swelling Value (2 mg / 100 ml)	30 – 33 ml
3	pH Value	9 – 11
4	MB Value (mg / gm of clay)	390 min
5	Green Compressive Strength (gm / cm2 )	950 min
6	Wet Tensile Strength (N / cm2)	0.30 – 0.35
7	Green compressive strength, Thermal	700 – 750
8	Wet Tensile strength, Thermal	0.15 – 0.20
9	Loss on Ignition (LOI)	8 – 10%
10	Durability (550 oC , 30 min)	70% min
11	Gelling Time (Second)	Instant
12	Passing through 200 mesh	85% min

Advantages:

The high-purity material, less sand content as the fine powder.
Better shake out a property, low consumption.
Engineered GCS and WTS ensure initial low consumption and very less rejection.

Applications:

It is recommended to use all kinds of Greensand process and also for some alloy castings.

Note:

All the tests are carried out as per VDG Standard.
API 13 A SECTION – 10

Sr. No.	Parameters	API 13 An SECTION-10
1	YP / PV Ratio	1.5 max
2	Dispersed PV	10 min
3	Dispersed Fluid Loss	12.5 ml max
Name of Drilling Grades		Abbreviations of Drilling Grades
API 13 A SECTION 10		Not Treated Bentonite

API 13 A SECTION – 11(OCMA)

Sr. No.	Parameters	API 13 An SECTION-11 (OCMA)
1	Viscometer dial reading at 600 rpm	30 min
2	YP / PV Ratio	6 max
3	API Fluid Loss	16 ml max
4	Residue > 75 µm	2.5% max
5	Moisture Content	13% max
Name of Drilling Grades		Abbreviations of Drilling Grades
API 13 A SECTION 11		Oil Company Material Association (OCMA) Bentonite

Advantage:

Bentonite extracts the drill cuttings from around the bit floats to the surface.
Bentonite seals the drill hole against seepage and prevents wall cavities and leakages.
cause to cool and lubricate the drill bit.
slurry form with leakages pumps through drill stem and out through drill bit.

Applications:

Drilling mud (gel) is crucial in the extraction of drill cutting during the drilling processes.
the gel is a major component in the good drilling process.
Another conventional use of bentonite is a mud constituent for oil and water well drilling. Its roles are mainly to seal the borehole walls, remove drill cuttings, and lubricate the cutting head.