Mineral Stone Powders: Applications, Types and Quality Grades

A summary of our company’s activities is presented below:

Introduction

Mineral powders are important raw materials for construction, ceramics, glass, agriculture and selected pharmaceutical applications. This article reviews silica, calcium carbonate, dolomite and feldspar powders, common particle sizes and industrial uses.

1. Silica Powder: Grades and Applications

Silica (SiO₂) is an abundant mineral valued for hardness and purity. It is supplied in micronized and granulated grades.

• Premium Silica: Above 99% purity for quality glass, crystal and ceramic products.  
• Grade 1 Silica: Approximately 98% purity for foundry, sandblasting and water filtration.  
• Grade 2 Silica: Economical grade for bricks, lime-sand products and cement.  

Common Particle Sizes

• Mesh 230: Fine micronized powder for fillers, mortars and concrete.
• 0.2–0.8 mm: Granulated grade for ceramics and industrial processes.
• 1–2 mm: Used in filtration and selected industrial applications.

Applications
Micronized silica is used in paints, rubber, ceramic glazes, water treatment, plastics and concrete.

2. Calcium Carbonate Powder: Grades and Applications

Calcium carbonate (CaCO₃) is a versatile, cost-efficient mineral used across many industries.

• Premium Calcium Carbonate: High-purity white grade for pharmaceuticals, selected food applications, paints and plastics.  
• Grade 1 Calcium Carbonate: Used in paper, paints and construction materials.  
• Grade 2 Calcium Carbonate: Used mainly in cement and lightweight concrete.   

Common Particle Sizes

• Mesh 230: Used as a filler and reinforcing mineral in plastics and paints.
• 0.2–0.8 mm: Used in masterbatch and industrial additive formulations.
• 1–2 mm: Used in selected construction materials.

Applications
Calcium carbonate is used as a filler in paper, plastics and paints and for soil pH adjustment in agriculture.

3. Dolomite Powder: Grades and Applications

Dolomite (CaMg(CO₃)₂) supplies both calcium and magnesium and offers distinctive industrial properties.

• Premium Dolomite: High-purity light-colored grade for glass and steel.  
• Grade 1 Dolomite: Used in ceramic glazes and concrete additives. 1–2 mm: Used in construction materials.
• Grade 2 Dolomite: Used in agriculture and refractory bricks.  

Common Particle Sizes

• Mesh 230: Used as an additive in concrete and mortar.
• 0.2–0.8 mm: Used in glaze and ceramic production.
• Mesh 230: Used in glazes and filler applications.

Applications
Dolomite’s heat resistance supports refractory applications, while its calcium and magnesium content supports acidic-soil conditioning.

4. Feldspar Powder: Grades and Applications

Feldspar is a tectosilicate mineral containing calcium, sodium or potassium and is widely used in glass and ceramics.

• Premium Feldspar: High-purity grade for quality ceramics, tiles and glazes.  
• Grade 1 Feldspar: Used in glass and selected paint formulations.  
• Grade 2 Feldspar: Used in bricks and construction materials.  

Common Particle Sizes

• Mesh 230: Used in glazes and filler applications.
• Coated Calcium Carbonate
• 1–2 mm: Used in construction materials.

Applications
Feldspar’s relatively low fusion temperature makes it a principal raw material in ceramics, glass, paints and glazes.

Conclusion

Silica, calcium carbonate, dolomite and feldspar powders play essential roles across industries. Selecting the correct grade and particle size supports product quality and production efficiency.

Alvand Giti Hegmataneh develops dependable, mutually beneficial mineral-supply partnerships based on trust and transparency.