This is often regarded as the beginning of liquation, but evidence suggests liquation may have existed in smaller-scale use centuries earlier.
12.
This is often regarded as the beginning of liquation, but evidence suggests liquation may have existed in smaller-scale use centuries earlier.
13.
The BRM lead refinery at Northfleet in England uses the Parkes process followed by liquation and a vacuum induction retort to recover precious metals.
14.
The tops are then drawn off and used to produce copper while the silver-rich bottoms are used in the liquation process.
15.
The waste products are mostly in the form of liquation thorns from the liquation and the drying process but there are also some slags produced.
16.
The waste products are mostly in the form of liquation thorns from the liquation and the drying process but there are also some slags produced.
17.
Theoretically, this could even result in defects due to the liquation of low-melting-point phases ( similar to liquation cracking in fusion welds ).
18.
Theoretically, this could even result in defects due to the liquation of low-melting-point phases ( similar to liquation cracking in fusion welds ).
19.
The exhausted liquation cakes which still contain some lead and silver are dried in a special furnace which is heated to a higher temperature under oxidising conditions.
20.
This is essentially just another stage of liquation and most of the remaining lead is expelled and oxidised to form liquation thorns, though some remains as lead metal.
