Location: GLO - Global
The grinding is assumed to be accomplished with diamond studded grinding wheels. The diamond losses are not taken into account even though they might be significant as no data on diamond production is available. The dust emissions are estimated based on the losses (0.5 mm abrasion around the granite plate with geometry of 0.5 * 0.5 * 0.03 m and a weight of 2?750 kg/m3). It is assumed that 95% of the dust is bound in the cooling water.
[The full documentation of this dataset was originally provided in the corresponding ecoinvent report from the Swiss Centre for Life Cycle Inventories, which is accessible for free to guests and users of ecoinvent version 2 (https://www.ecoinvent.org/login-databases.html). The dataset may subsequently have been subjected to central changes to the database, as described in the respective change report for each new release.]
Undefined unit processes (UPRs) are the unlinked, multi-product activity datasets that form the basis for all of the system models available in the ecoinvent database. This is the way the datasets are obtained and entered into the database by the data providers. These activity datasets are useful for investigating the environmental impacts of a specific activity (gate-to-gate), without regard to its upstream or downstream impacts.