Arsenic top countries and global production

On roasting arsenopyrite in air, arsenic sublimes as arsenic(III) oxide leaving iron oxides,[30] while roasting without air results in the production of metallic arsenic. Further purification from sulfur and other chalcogens is achieved by sublimation in vacuum, in a hydrogen atmosphere, or by distillation from molten lead-arsenic mixture.

Reference 1: 2014 As2O3 Production[32].

Reference 2: China, Morocco, Russia, Belgium, Bolivia, Japan and World Total (rounded).

Source: http://en.wikipedia.org/wiki/Arsenic