Lead production

Discover allows the user to calculate emissions from lead produced by Direct Smelting (DS), from the Imperial Smelting Furnace (ISF) and from secondary materials. Each of these exists as a drill-down option in this category, so can be calculated individually. To use this category use the leadProductionBySource drill-down to select the lead source or furnace type from the following options:

1. default
2. imperial smelt furnace (ISF) production
3. direct smelting (DS) production
4. treatment of secondary raw materials

The only required profile item value is the quantity of lead produced, productQuantity. The emission factor for each source and furnace type has a default value provided, but this can be over-ridden, using the massCO2PerMassProduct profile item value, by the user if more precise, site or country-specific values are known. Over-riding the default values represents the Tier 2 approach described by the IPCC Guidelines for National Greenhouse Gas Inventories (NGGIP) and should be used where users have facility-specific data.