copper is found in many places throughout the world but perhaps the largest single copper mining operation known is this authentic mine at bingham utah in the united states to one cover the art it is necessary to bust down on the when the going is done a long bow pipe is dropped into the hole after under pressure is blown in shooting out all water mud and loose dirt leaving the hole clean and ready to be loaded with dynamite drilled in the same way explosions in these holes cut out the bottom of the walls to keep them even explosions in the vertical holes low down the great masses of earth and on the lower levels  stick powder is used in the harness auto holds about three hundred seventy five pounds a powder are loaded into each one after blasting the great power shell let's go to work to haul away the earth that covers the our trains of empty one hundred ton cars i run into the blasted down section and the shovels begin loading one hundred twenty five cars  earth are moved to every one hundred cars of or as the levels of the pit are blasted back railroad tracks must be moved back also to bring the empty cars alongside the shovels moreover picks up both itself and the track and jones over sideways to the new as the connors are loaded they move out of the pit and are coupled with others to make up a single long train then they head for the ma arriving here the train is split up and a few cars of the time i back them to the temple for dumping two cars move on and are turned upside down the larger chunks of all are caught and broken by this big crash or the smaller pieces go right on through which grind the or until it becomes almost like power new balls are added every day and when they come out again they're almost worn away in these bar mills too water is mixed with the or which now it's all fine and powdery it makes the water muddy and thick as it leaves the big drops chemicals that make proper added next or particles containing copper stick to the frothy bubbles which rise to the top of the water this is called a flotation process because the powdered particles containing copper known as copper sulfide actually float to the top where the bubble as removed by boat by these disks shaped canvas filters strong suction causes the sulfide to stick to the canvas as it rotates through the bubbles next the suction is changed to pressure and the sulfide fall is off other ares containing silica irons copper and other minerals must be added to the copper concentrate before smelting to make it heat and burn more rapidly there a carload of these or as is dum after the ores have been added to the copper concentrate the mixture is hollow to the roaster now the heating and burning process begins sulphur burns burst that is what you see here from the roaster they are a mixture now called callsigns goes to the great furnace is why for the first time it becomes hot enough to melt these fantasies reach almost twenty eight hundred degrees fahrenheit in its mo form the copper or mixes with other elements such as iron seleka and lime to form what is called copper map and flag the flag as waste it is hollowed out and  back inside the smelter the molten copper mapped as drawn from the great front of this in huge buckets handled by overhead crane it is now dumped into the converters if long section of the smelter is called the converter aisle it is filled with noise in the converter's air is blown through the molten next trick to help burn out impurities finally there remains the mountain copper approximately ninety nine percent pure it also contains small quantities of precious metals such as gold and silver their cooled by streams of water they come out of the bath still steaming and too hot to touch except with hooks and asbestos gloves workmanlike the blocks weighing five hundred pounds each onto hancock's and take them immediately into waiting boxcars where they are to be shipped t refineries far further processing after this reclining has been done the copper will be made into telephone cable electric wires copper sheets wrapping some of her generators and of thousand other items that serve you and your home every day as you pick up your telephone stock your back in sleep or hard food mixer remember that it is copper coming from the great storehouse of art that makes possible these useful items around john hol