free zinc mining pictures - mining equipment mine process . zinc miners with a 40 ton mine truck portrait royalty-free image photo of zinc miners with a 40-ton mine truck, portrait. royalty-free image by ron levine from,illinoismines mining artifacts,for those who remained, mining often became a part-time supplement to farming. some men began to mine for zinc, and for a few years in the late nineteenth century, mineral point had the largest zinc smelting facility in the world. from 1900 through world war i, zinc production boomed. production reached a peak of 64,000 tons of zinc metal in 1917.