Gold costs were about $317 per troy ounce in 2007, but these can vary widely depending on mining type and ore quality; global mine production amounted to 2,471.1 tonnes. After initial production, gold is often subsequently refined industrially by the Wohlwill process which is based on electrolysis or by the Miller process, that is chlorination in the melt. The Wohlwill process results in higher purity, but is more complex and is only applied in small-scale installations. Other methods of assaying and purifying smaller amounts of gold include parting and inquartation as well as cupellation, or refining methods based on the dissolution
Refine S2 electric motor producing 116 hp and 270 Nm of torque. The iEV7S comes with a 39 kWh battery, and the range of the iEV7S is 280 kilometers. The same platform later spawned the SOL E20X from SOL, the EV joint venture between Volkswagen and JAC, with only a minor restyling for the front and rear DRGs in an attempt to recreate SEAT's styling on the iEV7S. Refine S2 The Refine S2 is a subcompact CUV produced by JAC Motors under the Refine sub-brand. It was positioned between the Refine S2 Mini and the Refine S3 compact CUV. The Refine S2