Calcination step 1: Pre-extraction testing

Transcript

Narrator

Before quarrying a deposit, drill samples need to be carefully analysed to determine the quality of the deposit in terms of percentage of calcium carbonate present and absence of inert materials like silica and iron oxides.

Some of the quarry deposits are richer in calcium carbonate than others, and for calcination purposes it is essential that that correct grade of 97% calcium carbonate content and above be chosen.

Fines from the drill are collected, bagged and labelled and then sent to the on-site lab at the calcination plant for chemical analysis.

Acknowledgement: McDonald’s Lime Limited