Industrial / Chemical Grade Gypsum

Industrial / Chemical Grade Gypsum is a high-purity calcium sulfate material—primarily CaSO₄·2H₂O (gypsum), and in some cases hemihydrate or anhydrite—used as a chemical feedstock, functional additive, or process material. It is selected for chemical purity, controlled reactivity, and consistency, not for structural strength, decorative appearance, or bulk soil use.

Strengthening & Metallurgical Behavior

Strengthening behavior:
Industrial gypsum is not used for mechanical strengthening. Its role is chemical and functional, acting as:

• Binder precursor
• Functional filler
• Chemical reactant

Metallurgical behavior:
🚫 Generally avoided in metallurgy. Sulfur content is undesirable in steel and alloy production. Only very limited non-ferrous niche uses exist.

Key Characteristics

✔ Very high chemical purity
✔ Predictable and controlled reactivity
✔ Controlled solubility behavior
✔ Low contaminant levels (Fe, SiO₂, organics)
✔ Stable during storage and transport
✔ Compatible with sensitive chemical processes

Refining & Processing Properties

Source materials:
• Selected high-purity natural gypsum
• Beneficiated gypsite
• Synthetic gypsum (FGD, purified phosphogypsum)

Processing steps:
• Crushing
• Washing (if required)
• Drying
• Fine grinding
• Classification
• Chemical quality testing

Thermal processing (optional):
Controlled calcination to produce:

• Hemihydrate (moderate reactivity)
• Anhydrite (slow-reacting form)

Available Forms

✔ High-purity gypsum powder
✔ Calcined gypsum (chemical plaster)
✔ Anhydrite powder
✔ Granulated chemical gypsum
✔ Custom particle-size products

Applications

Chemical industry:
• Calcium and sulfur feedstock
• Precipitating and neutralizing agent
• Limited pH buffering
• Catalyst carrier (special grades)

Industrial manufacturing:
• Fillers in plastics, rubber, and paints
• Paper coating and filler
• Adhesives and sealants
• Glass and ceramic processing

Specialty uses:
• Pharmaceutical excipient (controlled grades)
• Food-processing aids (approved grades)
• Water treatment additives

Advantages of Industrial / Chemical Grade Gypsum

✔ Consistent chemical quality
✔ Low impurity interference
✔ Predictable process behavior
✔ Cost-effective calcium and sulfur source
✔ Compatible with multiple industrial sectors

Why Choose Industrial / Chemical Grade Gypsum?

This grade is selected when chemical performance, purity, and process control are critical. It ensures product consistency, regulatory compliance, and minimal contamination risk in high-value chemical and industrial applications.

Chemical Grade vs Other Gypsum Grades