Mining of raw materials for the chemical industry and the production of fertilizers
This subclass includes:
- mining of natural phosphates and potassium salts
- mining of natural sulfur
- mining and enrichment of iron ore (pyrites), except by roasting
- mining of natural barium sulfate (barite) and barium carbonate (witherite), natural borates, natural magnesium sulfate (kieserite)
- mining of mineral pigments, fluorspar and other minerals primarily used as a source of chemicals
- mining of animal remains (guano).
Excludes:
- salt mining, see 08.93
- iron ore roasting, see 20.13
- manufacture of chemical (synthetic) fertilizers and nitrogen compounds, see 20.15