Gypsum (CaSO₄·2H₂O) is a naturally occurring soft mineral with low hardness (Mohs scale 2). When heated, it loses water to form plaster (CaSO₄·½H₂O). It is widely used in construction, agriculture, medicine, and industry.

Properties:

  • Color: White, gray, yellow, or pink.

  • Hardness: 2 on the Mohs scale.

  • Density: ~2.3 g/cm³.

  • Thermal Resistance: Loses crystalline water above 150°C.

Natural Sources:

  • Sedimentary rocks, salt lakes, quarries.

How Does a Gypsum Crushing-Screening Plant Work?

Definition:
A gypsum crushing-screening plant processes raw gypsum into specific sizes for industrial use. The plant involves crushing, screening, and storage to produce materials for construction, agriculture, or chemical production.

Process Stages:

  1. Primary Crushing:

    • Jaw Crusher/Impact Crusher: Reduces raw gypsum blocks (300-500 mm) to 50-150 mm.

    • Purpose: Make large blocks transportable and processable.

  2. Secondary Crushing:

    • Hammer Crusher/Cone Crusher: Further reduces material to 5-30 mm.

    • Moisture Control: Pre-drying if gypsum is moist.

  3. Screening:

    • Vibrating Screens: Classifies crushed material into sizes: 0-5 mm (fine), 5-20 mm (medium), 20-30 mm (coarse).

    • Recycling: Oversized particles are recirculated.

  4. Storage & Dispatch:

    • Silos/Open Yards: Processed gypsum is stored or packaged based on usage.

Equipment Used:

  • Jaw crusher, hammer crusher, vibrating screen, belt conveyor, dust suppression systems, automation controls.