Technical Product Specification

High-PurityIndustrialSilicaSandSpecifications(>99%SiO₂)

Mined, hydro-washed, and rotary kiln-dried in Bhuj, Kutch (Gujarat). Engineered with sub-angular crystalline quartz grains, rotary kiln-dried moisture (0.15%–0.25%), deslimed clay (<0.18% max), and calibrated multi-deck sieve distribution (AFS 25 to 65).

Request Batch Quote / Free 2 KG Sample Download Master Spec Sheet (PDF)

Important Specification & Custom Recipe Notice:The figures and sieve tables below illustrate our standard production benchmarks. Every consignment is custom-processed, hydro-washed, rotary kiln-dried, and screen-classified strictly according to the specific chemical tolerances, particle size distribution (AFS fineness number), and packaging requirements mandated by each client's individual plant process. We do not restrict supply to fixed grades — custom sieve distributions are calibrated upon request.

Chemical Assay Standards

TypicalChemicalAnalysis

Silicon Dioxide (SiO₂)99.20% – 99.51%

Iron Oxide (Fe₂O₃)184 – 300 ppm (Certified Batches)

Aluminium Oxide (Al₂O₃)0.21% – 0.54%

Titanium Dioxide (TiO₂)389 – 610 ppm (Grade-Specific)

Loss on Ignition (LOI)< 0.20% – 0.25%

Free Moisture Content0.15% – 0.25% (Rotary Kiln-Dried)

Physical & Thermal Properties

PhysicalPerformanceStandards

Refractoriness / Sintering Point> 1,650°C (> 3,000°F)

Grain Shape / MorphologySub-Angular to Rounded

Specific Gravity / Mohs Hardness2.65 g/cm³ | 7.0 Mohs

Deslimed Clay Content (Slimes)< 0.18% Max (Deslimed)

Acid Demand Value (ADV)< 2.5–3.0 mL (Neutral Quartz)

PAN Dead Dust (-140M & Pan)0.00% (Certified Reference Spec)

Interactive Tool

Grade Recommender & Specification Comparison

Select your manufacturing process or casting type to instantly view the recommended AFS sieve grading and chemical assay.

Step 1: Select Your Manufacturing Process / Foundry Type

Step 2: Recommended Silica Sand Grade & Assay

Medium / High Strength✓ Rotary Kiln-Dried (0.15%–0.25%)

Foundry Grade FD-35

Target Metal / Application: Spheroidal Graphite (SG) & Ductile Iron

Moulding / Melting System: High-Pressure Automated Green Sand Lines

Technical Rationale:Balanced grain geometry maximizes green compression strength. Low ADV (<3.0 mL) can reduce resin binder consumption by approximately 15%–20%, depending on process parameters.

Request Sample for Ductile Download Spec (PDF)

Target Grade Parameters

Grain Fineness (AFS):AFS 30 – 35

Mesh Range (ASTM):30 / 60 Mesh (0.25 – 0.60 mm)

Silica Purity (SiO₂):> 99.15%

Iron Oxide (Fe₂O₃):< 0.040%

AFS Active Clay:< 0.18% Max (Deslimed)

Free Lab Evaluation:Complimentary 2 KG Calibration Box

⚡ Custom 3-screen / 4-screen sieve fractions calibrated on plant order.

Standard AFS Sieve Gradation Benchmarks

Download standard specification sheets or request a tailored sieve mesh distribution for your core shooter or furnace batch.

Grade Classification	AFS Number	ASTM Mesh	SiO₂ %	Clay %	Moisture %	Target Application	Spec Sheet
Foundry Grade FD-28	AFS 25 - 28	20 / 40 Mesh	> 99.10%	< 0.18%	0.18%	Heavy Steel Castings, Large Grey Iron Moulds, Ingot Moulds	PDF Spec
Foundry Grade FD-35	AFS 30 - 35	30 / 60 Mesh	> 99.15%	< 0.18%	0.20%	Ductile/SG Iron, Automotive Castings, High-Pressure Valve Bodies	PDF Spec
Foundry Grade FD-42	AFS 40 - 45	40 / 70 Mesh	> 99.20%	< 0.18%	0.21%	Automotive Castings, Shell Moulding, Green Sand	PDF Spec
Foundry Grade FD-52	AFS 50 - 55	50 / 100 Mesh	> 99.25%	< 0.18%	0.21%	Cold-Box / Hot-Box Core Shooters, Pump Casings	PDF Spec
Foundry Grade FD-62	AFS 60 - 65	60 / 140 Mesh	> 99.30%	< 0.18%	0.19%	RCS (Resin Coated Sand), Investment Casting	PDF Spec

AFS 25 - 28

Foundry Grade FD-28

Mesh: 20 / 40 Mesh

PDF

SiO₂> 99.10%

Clay< 0.18%

Moisture0.18%

Application: Heavy Steel Castings, Large Grey Iron Moulds, Ingot Moulds

AFS 30 - 35

Foundry Grade FD-35

Mesh: 30 / 60 Mesh

PDF

SiO₂> 99.15%

Clay< 0.18%

Moisture0.20%

Application: Ductile/SG Iron, Automotive Castings, High-Pressure Valve Bodies

AFS 40 - 45

Foundry Grade FD-42

Mesh: 40 / 70 Mesh

PDF

SiO₂> 99.20%

Clay< 0.18%

Moisture0.21%

Application: Automotive Castings, Shell Moulding, Green Sand

AFS 50 - 55

Foundry Grade FD-52

Mesh: 50 / 100 Mesh

PDF

SiO₂> 99.25%

Clay< 0.18%

Moisture0.21%

Application: Cold-Box / Hot-Box Core Shooters, Pump Casings

AFS 60 - 65

Foundry Grade FD-62

Mesh: 60 / 140 Mesh

PDF

SiO₂> 99.30%

Clay< 0.18%

Moisture0.19%

Application: RCS (Resin Coated Sand), Investment Casting

Direct Mine-to-Plant Supply Across Gujarat & Western India

Explore dispatch hubs from Morbi, Kutch, Bharuch, and Mundra Port with certified COA guarantees.

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Complimentary Lab Calibration Program

Need a 2 KG Calibration Sample Box for Plant Testing?

We courier a complimentary 2 KG trial sample box directly to your plant quality lab for Ro-Tap sieve analysis and binder testing. Every bulk dispatch includes an authenticated lot COA with 90-day physical reference retention.

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