Gypsum - mineral (primary zinc production from concentrate)

The activity generating the emissions is primary zinc production from concentrate. The reference product is gypsum, mineral. The product "gypsum, mineral" represents the natural mineral CaSO4 * 2 H2O, milled. It is mined together with anhydrite rock in open pit mining. The output of the mine is crushed and sorted. The intermediate products are composed of about 65% natural gypsum (CaSO4 * 2 H2O), 34% natural anhydrite rock (CaSO4) and 1% soil and gravel that are deposited back in the mine. The material is gained by blasting and digging. Gypsum is used by the cement industry; as a filler in the paper industry, and as raw material for (burned) anhydrite and stucco. The reference product amount is 1. The cut-off classification is allocatable product. The activity type is ordinary ordinary transforming activity. Please refer to the ecoinvent documentation here for full details: https://ecoquery.ecoinvent.org/3.11/cutoff/dataset/21072/documentation.