QUARTZITE
LUMPS
Construction/Crushed
Quartzite Lumps – Construction / Crushed
SiO₂ (Silica): 95 – 97%
Al₂O₃ (Alumina): 1.0 – 1.5%
Fe₂O₃ (Iron Oxide): 0.5 – 1.0%
CaO + MgO ≤ 1.5%
Moisture < 0.5%
Whiteness / Color: Greyish to off-white, coarse texture
Appearance: Hard, angular crushed stone
Applications
Road construction aggregate
Railway ballast
Concrete & asphalt mixes
Building stone
General civil works
Physical Specifications
Size Fractions:
Construction/Crushed: 20 – 40 mm, 40 – 80 mm, 80 – 150 mm, 150 mm+
Refractory/Ferroalloy: 25 – 50 mm, 50 – 100 mm, 100 – 200 mm
Density / Bulk Density: 2.6 – 2.65 g/cm³
Hardness (Mohs): 7+ (very high abrasion resistance)
Thermal Stability: Melting point ~1710°C
Sorting & Grading
Processing Method:
Construction grade: Mechanized crushing, screening, washing
Ferroalloy/Refractory grade: Selective quarrying, hand sorting for low Fe and consistent chemistry
Impurity Control:
Construction: Tolerant to Fe and Al impurities
Ferroalloy/Refractory: Strict Fe₂O₃ < 0.3% for furnace-grade silica
QUARTZITE
Quartzite is valued for its strength, high silica content, and heat resistance, making it ideal for, We can be supplying 2,000–3,000 MT/month, Mineastra provides dependable Quartzite for ferro-alloys, refractories, and construction.
25–200 mm
RAW STONES, BOULDERS
Refractory / Ferroalloy
Quartzite Lumps – Refractory / Ferroalloy
SiO₂ (Silica): 97.5 – 99%
Al₂O₃ (Alumina) ≤ 0.8%
Fe₂O₃ (Iron Oxide) ≤ 0.3%
CaO + MgO ≤ 0.5%
Moisture < 0.3%
Whiteness / Color
Whiteness / Color: Off-white to light grey, clean fracture
Appearance: Dense, blocky lumps with minimal inclusions
Applications
Ferro-silicon & silicon manganese alloys
Ferroalloy furnaces
Flux in metallurgical processes
High-grade construction aggregates
Packaging & Supply
Packaging Options:
Loose bulk loading (tipper trucks, bulk vessels)
Jumbo Bags (1 MT) for furnace-grade export
Container Capacity: ~25 MT / 20 ft container (bagged)
Supply Format: Bulk supply for construction; certified, graded lots for refractory/metallurgical use
QUARTZITE
POWDER
Quartzite Powder
Quartzite Powder – Construction Grade
SiO₂ (Silica): 95 – 97%
Al₂O₃ (Alumina): 1.0 – 1.5%
Fe₂O₃ (Iron Oxide): 0.5 – 1.0%
CaO + MgO ≤ 1.5%
Moisture < 0.5%
Whiteness / Color: Greyish to off-white, coarse finish
Appearance: Coarse to medium-fine ground powder
Applications
Cement & concrete additives
Asphalt fillers
Ceramic floor tiles
Paints & construction fillers
Physical Specifications
Particle Sizes:
Construction Grade: D50 = 150 µm, 75 µm, 45 µm
Refractory/Ferroalloy Grade: D50 = 75 µm, 45 µm, 25 µm, 10 µm (micronized)
Density / Bulk Density: 2.6 – 2.65 g/cm³
Hardness (Mohs): 7+
Thermal Stability: Melting point ~1710°C
Sorting & Grading
Processing Method:
Crushing → Grinding (hammer mill / ball mill) → Air classification → Micronized sieving
Impurity Control:
Construction Grade: Tolerant to Fe₂O₃ up to 1%
Refractory Grade: Fe₂O₃ ≤ 0.3%, strict control of Al₂O₃ and alkalis, acid washing possible for premium batches
PROCESSED
Quartzite Sand
Quartzite Powder – Refractory / Ferroalloy Grade
SiO₂ (Silica): 97.5 – 99%
Al₂O₃ (Alumina)≤ 0.8%
Fe₂O₃ (Iron Oxide)
CaO + MgO ≤ 0.3%
Moisture ≤ 0.5%
Whiteness / Color: < 0.3%; Off-white to light grey, clean powder
Appearance: Fine micronized powder, consistent particle size
Applications
Ferro-silicon alloying flux
Silicon manganese production
Refractory bricks & castables
Foundry moulds
Metallurgical fluxes
Packaging & Supply
Packaging Options:
HDPE Woven Bags: 25 / 50 kg
Jumbo Bags: 1 MT with liner
Bulk tanker loading (for construction fillers)
Container Capacity: ~25 MT / 20 ft container
Supply Format: Regular bulk supply for construction; certified lots for refractory/metallurgical industries