Division 13Production of magnesia

Division 13—Production of magnesia

313 (1) The production of magnesia is the chemical and physical transformation of magnesite (magnesium carbonate (MgCO3)) into one or more of the following magnesia products: (a) caustic calcined magnesia that: (i) has a concentration of magnesium oxide (MgO) of at least 75%; and (ii) is burned between 650 °C and 1 200 °C; (b) deadburned magnesia that: (i) has a concentration of magnesium oxide (MgO) of at least 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 (MgO) of at least 90%; and (ii) has grain density of greater than 3.45 g/cm3; and (iii) is fused at temperatures higher than 2 750 °C. (2) The production of magnesia is specified as an emissions‑intensive trade‑exposed activity. (3) The production of magnesia is a highly emissions‑intensive activity.

Note: See Part 4.

(4) For the production of caustic calcined magnesia, the basis for the issue of free carbon units is by a tonne of caustic calcined magnesia on a dry weight basis that: (a) has a concentration of magnesium oxide (MgO) of at least 75%; and (b) is produced by, or as part of, carrying on the emissions‑intensive trade‑exposed activity; and (c) is of saleable quality; whether or not it is later transformed into deadburned magnesia or electrofused magnesia.

Note: Saleable quality is explained in Part 2.

(5) For the production of deadburned magnesia, the basis for the issue of free carbon units is by a tonne of deadburned magnesia on a dry weight basis that: (a) has a concentration of magnesium oxide (MgO) of at least 85%; and (b) has grain density of 2.85 g/cm3 to 3.45 g/cm3; and (c) is produced by carrying on the emissions‑intensive trade‑exposed activity; and (d) is of saleable quality.

Note: Saleable quality is explained in Part 2.

(6) For the production of electrofused magnesia, the basis for the issue of free carbon units is by a tonne of electrofused magnesia on a dry weight basis that: (a) has a concentration of magnesium oxide (MgO) of at least 90%; and (b) has grain density of greater than 3.45 g/cm3; and (c) is produced by carrying on the emissions‑intensive trade‑exposed activity; and (d) is of saleable quality.

Note: Saleable quality is explained in Part 2.