According to the International Lead & Zinc Study Group, refined zinc production reached 12.8 million tons (or about 28 million pounds) in 2013.
The ten largest zinc producers accounted for just over 5.8 million tons or 45 percent of the world total.
The ten largest refiners include both companies that mine and refine their own zinc ores, as well as refiners that purchase from independent mines. In many cases, refiners use both their own and sourced zinc ore supplies.