A magnesium ore crushing and screening plant is a facility designed to process magnesium-containing ores (e.g., magnesite (MgCO₃) or dolomite (CaMg(CO₃)₂) into industrial-grade sizes. These plants crush, screen, grind, and classify raw magnesium ore to prepare it for applications in metallurgy, chemicals, agriculture, and refractory material production.

Working Principle and Stages:

  1. Raw Material Feeding:

    • Magnesium ore (50-100 cm) extracted from mines is loaded into the feed hopper via excavators or trucks.

    • Pre-Screening (Grizzly Screen): Removes large impurities (rocks, soil, metal).

  2. Crushing Process:

    • Primary Crushing (Jaw Crusher): Reduces ore to 10-20 cm.

    • Secondary Crushing (Cone Crusher or Impact Crusher): Crushes material to 2-5 cm.

    • Tertiary Crushing (Vertical Shaft Crusher): Produces fine sizes (0-2 cm) or powder.

  3. Screening and Classification:

    • Vibrating Screens: Sorts crushed material into granular sizes (0-3 mm, 3-10 mm, 10-25 mm).

    • Air Classifiers (For Powder): Generates micron-sized magnesium powder (10-200 µm).

  4. Storage and Transportation:

    • Aggregates are stored in stockpiles; powders are kept in enclosed silos.

    • Final products are transported to industrial facilities via trucks or conveyor belts.

Applications:

  • Metallurgy: Magnesium alloys (lightweight metal production),

  • Refractory Materials: High-temperature-resistant bricks and coatings,

  • Agriculture: Soil pH regulation and magnesium supplements,

  • Chemical Industry: Magnesium oxide (MgO) and chemical production,

  • Pharma and Food: Magnesium supplements and additives.

Key Equipment:

  • Jaw crusher, cone crusher, vertical shaft crusher, vibrating screens, conveyor belts, dust control systems, grinding mills.