https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/12152219Edit ImageSaveSaveEditCropCustom Text Make it Yours.Edit, remix and personalize with your own textCustomizeOr start from these designsAnaconda smelter, Montana. Anaconda Copper Mining Company. Copper converter in action. Object of converting is to eliminate sulphur and iron; this is accomplished by blowing compressed air through the molten charge. The oxidation products unite with silica which is added to form a slag which floats on the surface and is easily skimmed off by Russell LeeView public domain image source hereMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGTIFFSmall JPEG 1200 x 1198 px | 300 dpiLarge JPEG 3500 x 3494 px | 300 dpiBest Quality JPEG 4904 x 4895 px | 300 dpiTIFF 4904 x 4895 px | 300 dpi | 45.79 MBEdit ImageMonthlyYearlySave 50%Get PremiumProfessional design resources and creative toolsfromfrom$6.50/mo$78 billed yearlyUnlimited downloadsAd-free experienceUnlock millions of creative assets and our entire Creative Studio of editable templates, mockups and design toolsBuy Now