Registration Dossier

Manufacture, use & exposure

Manufacture

Documentsopen allclose all

Manufacture

Contributing activity / technique for the environmentopen allclose all
Environmental release category (ERC):
ERC6a: Use of intermediate
Environmental release category (ERC):
ERC1: Manufacture of the substance
Contributing activity / technique for workersopen allclose all
Process category (PROC):
PROC 3: Manufacture or formulation in the chemical industry in closed batch processes with occasional controlled exposure or processes with equivalent containment conditions
Process category (PROC):
PROC 8b: Transfer of substance or mixture (charging and discharging) at dedicated facilities
Process category (PROC):
PROC 22: Potentially closed processing operations with minerals/metals at elevated temperature. Industrial setting
Related assessment:
use assessed in a joint CSR

Manufacture

Contributing activity / technique for the environment
Environmental release category (ERC):
ERC1: Manufacture of the substance
Contributing activity / technique for workersopen allclose all
Process category (PROC):
PROC 3: Manufacture or formulation in the chemical industry in closed batch processes with occasional controlled exposure or processes with equivalent containment conditions
Process category (PROC):
PROC 8b: Transfer of substance or mixture (charging and discharging) at dedicated facilities
Process category (PROC):
PROC 22: Potentially closed processing operations with minerals/metals at elevated temperature. Industrial setting

Manufacture

Contributing activity / technique for the environmentopen allclose all
Environmental release category (ERC):
ERC6a: Use of intermediate
Environmental release category (ERC):
ERC1: Manufacture of the substance
Contributing activity / technique for workersopen allclose all
Process category (PROC):
PROC 3: Manufacture or formulation in the chemical industry in closed batch processes with occasional controlled exposure or processes with equivalent containment conditions
Process category (PROC):
PROC 8b: Transfer of substance or mixture (charging and discharging) at dedicated facilities
Process category (PROC):
PROC 26: Handling of solid inorganic substances at ambient temperature
Process category (PROC):
PROC 27a: Production of metal powders (hot processes)

Manufacture

Contributing activity / technique for the environment
Name of activity / technique:
Manufacture of TBO powder from APT - ERC1
Environmental release category (ERC):
ERC1: Manufacture of the substance
Contributing activity / technique for workersopen allclose all
Name of activity / technique:
Step 1 - Transfer to calcination process: Moist ammonium paratungstate (APT) is transported from APT-production by a conveyor through a drying-device into supply tanks - PROC 3
Process category (PROC):
PROC 3: Manufacture or formulation in the chemical industry in closed batch processes with occasional controlled exposure or processes with equivalent containment conditions
Name of activity / technique:
Step 2 - Loading the rotary kiln furnace: The APT is filled by an automated metering device into the rotary kiln furnace - PROC 3
Process category (PROC):
PROC 3: Manufacture or formulation in the chemical industry in closed batch processes with occasional controlled exposure or processes with equivalent containment conditions
Name of activity / technique:
Step 3 - Calcination: TBO is formed by calcination of APT under slightly reducing conditions in rotary kiln furnaces. These furnaces are operating around 800°C - PROC 22
Process category (PROC):
PROC 22: Potentially closed processing operations with minerals/metals at elevated temperature. Industrial setting
Name of activity / technique:
Step 4 - Unloading the furnace and transfer to homogenization operation: After calcination, the TBO powder is unloaded from the furnace and screened by an automated system. The TBO powder is collected in sealed metal containers - PROC 8b
Process category (PROC):
PROC 8b: Transfer of substance or mixture (charging and discharging) at dedicated facilities
Name of activity / technique:
Step 5: Homogenization: After calcination, the powders are blended in a tumbling mixer or a double cone blender to homogenize the tungsten oxides. The homogenization operation occurs in a closed system - PROC 3
Process category (PROC):
PROC 3: Manufacture or formulation in the chemical industry in closed batch processes with occasional controlled exposure or processes with equivalent containment conditions
Name of activity / technique:
Step 6:Unloading homogenization unit and fill into metal containers: Emptying the homogenization unit and filling powder into sealed metal containers - PROC 8b
Process category (PROC):
PROC 8b: Transfer of substance or mixture (charging and discharging) at dedicated facilities
Related assessment:
use assessed in a joint CSR