Document ID: chunk:federal_register_of_legislation:F2025C00184:clause:6_677
Version: federal_register_of_legislation:F2025C00184
Segment Type: clause
Provision Reference: sch 6 cl 677
Character Range: 382895–384250

677  Production of clinker
 (1) The production of clinker is the physical and chemical transformation of:
 (a) either or both of calcium carbonate compounds (limestone (CaCO3)) and other calcium carbonate (CaCO3) feedstocks; and
 (b) any of the following:
 (i) clay;
 (ii) clay mixed with 1 or more feedstocks that contain 1 or more of the following:
 (A) silicon dioxide (SiO2);
 (B) iron (Fe);
 (C) aluminium oxide (alumina (Al2O3));
 (iii) 1 or more feedstocks that, when combined, contain all of the following:
 (A) silicon dioxide (SiO2); and
 (B) iron (Fe); and
 (C) aluminium oxide (alumina (Al2O3));
that are fused together at a temperature above 1000 °C into Portland cement clinker.
 (1A) The production process may or may not involve the physical transformation of Portland cement clinker into cement through a process of comminution with gypsum or other additives. However, the process must involve the production of clinker as described in subclause (1).
 (2) The Portland cement clinker must:
 (a) have a concentration of calcium silicates equal to or greater than 60%; and
 (b) have a concentration of magnesium oxide (MgO) equal to or less than 4.5%; and
 (c) be useable in the making of Portland cement.
 (3) The production of clinker is specified as an emissions‑intensive trade‑exposed activity.

Division 2—Classification of activity