Copper is an element that occurs in minor amounts in the earth’s crust. Estimates of average crustal prevalence are on the order of 0.0058 percent by weight. Deposits considered to be economically recoverable at current market prices may contain as little as 0.5 percent of copper or less, depending on the mining method, total reserves, and the geologic setting of the deposit. Here is the flow sheet on how to process copper from Zenith. Copper Process Flow Sheet:
Copper ore is first quarried from the copper mountain and the raw materials are got. Next is to process and mine the raw copper materials. They are sent into jaw crusher for primary crushing through vibrating feeder. After the raw materials are crushed into coarse ones, with belt conveyor, they enter into impact crusher or cone crusher for the secondary crushing. There are two different copper ores, the oxide ore and the sulfide ore. The oxide ores are commonly leached, while the sulfide ores are beneficiated in flotation machine. Then the following mining and processing is divided into two types. The fine sulfide ore is going to froth flotation machine for recovery of copper. The coarser ore goes to the heap leach, where the copper is subjected to a dilute sulfuric acid solution to dissolve the copper. Then the leach solution containing the dissolved copper is subjected to a process called solvent extraction. The solvent extraction process concentrates and purifies the copper leach solution so the copper can be recovered at a high electrical current efficiency by the electro winning cells. It does this by adding a chemical reagent to the solvent extraction tanks which selectively binds with and extracts the copper, is easily separated from the copper (stripped), recovering as much of the reagent as possible for re-use. The concentrated copper solution is dissolved in sulfuric acid and sent to the electrolytic cells for recovery as copper plates.
Escondida Organic Growth Project 1(Chile)57.5%Copper
| H1 CY15
| Replaces the Los Colorados concentrator with a new 152,000 tpd plant.
| On schedule and budget. The overall project is 32% complete.
Copper is one of the basic chemical elements. In its nearly pure state, copper is a reddish-orange metal known for its high thermal and electrical conductivity. It is commonly used to produce a wide variety of products, including electrical wire, cooking pots and pans, pipes and tubes, automobile radiators, and many others. Copper is also used as a pigment and preservative for paper, paint, textiles, and wood. It is combined with zinc to produce brass and with tin to produce bronze. Copper was first used as early as 10,000 years ago. A copper pendant from about 8700 B.C. was found in what is now northern Iraq. There is evidence that by about 6400 B.C. copper was being melted and cast into objects in the area now known as Turkey. By 4500 B.C. , this technology was being practiced in Egypt as well. Most of the copper used before 4000 B.C. came from the random discovery of isolated outcroppings of native copper or from meteorites that had impacted Earth. The first mention of the systematic extraction of copper ore comes from about 3800 B.C. when an Egyptian reference describes mining operations on the Sinai Peninsula. In about 3000 B.C. , large deposits of copper ore were found on the island of Cyprus in the Mediterranean Sea. When the Romans conquered Cyprus, they gave the metal the Latin name aes cyprium, which was often shortened to cyprium. Later this was corrupted to cuprum, from which the English word copper and the chemical symbol Cu are derived. In South America, copper objects were being produced along the northern coast of Peru as early as 500 B.C. , and the development of copper metallurgy was well advanced by the time the Inca empire fell to the conquering Spanish soldiers in the 1500s. In the United States, the first copper mine was opened in Branby, Connecticut, in 1705, followed...
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