Document ID: chunk:federal_register_of_legislation:F2025C00184:clause:6_632
Version: federal_register_of_legislation:F2025C00184
Segment Type: clause
Provision Reference: sch 6 cl 632
Character Range: 334915–335850

632  Production of magnesia
 (1) The production of magnesia is the chemical and physical transformation of magnesite (magnesium carbonate (MgCO3)) into 1 or more of the following magnesia products:
 (a) caustic calcined magnesia that:
 (i) has a concentration of magnesium oxide (MgO) equal to or greater than 75%; and
 (ii) is burned between 650 °C and 1 200 °C;
 (b) deadburned magnesia that:
 (i) has a concentration of magnesium oxide equal to or greater than 85%; and
 (ii) has grain density of 2.85 g/cm3 to 3.45 g/cm3; and
 (iii) is burned between 1 300 °C and 2 200 °C;
 (c) electrofused magnesia that:
 (i) has a concentration of magnesium oxide equal to or greater than 90%; and
 (ii) has grain density of greater than 3.45 g/cm3; and
 (iii) is fused at temperatures in excess of 2 750 °C.
 (2) The production of magnesia is specified as an emissions‑intensive trade‑exposed activity.

Division 2—Classification of activity