Use of prereduced ore in a blast furnace

Use of rice hull ash in steelmaking

Use of scavenger in recovery of metal values

Use of silicon carbide as an addition to cupola furnaces

Use of tetraalkylammonium halides as flotation collectors

Use of the sodium salt of 2-mercaptopyridine-N-oxide to separate

Using a rotary device for treating molten metal

Utilization of sponge metal fines

Utilization of strontium aluminate in steelmaking

Vaccum refining method utilizing induction heater around a ladle

Vacuum cleaner base assembly

Vacuum interrupter contact

Vacuum melting/casting method to reduce inclusions

Vacuum processing of particulate reactive metal

Vacuum processing of reactive metal

Vacuum purification of liquid metal

Vacuum purification of liquid metals

Vacuum refining method for molten steel

Vacuum smelting process for producing ferromolybdenum

Vacuum smelting process for producing ferrotungsten