| Home » Classified Ads » Business Opportunities » Import & Export |
Stone Crushing Plant For Copper Concentrate
|
Ad Type: For Sale | Location: Alcantara
| Views: | Comments: | 24 May 2013
| |
|
<p> <img src="http://www.stonecrushermachine.org/d/file/Industry-Information/2012-12-27/fad9ffb8b18da6c626e90d71a11e92ad.jpg" alt="Stone Crushing Plant For Copper Concentrate" title="Click on Picture to view a larger version of Stone Crushing Plant For Copper Concentrate"> <h1>Stone Crushing Plant For Copper Concentrate</h1> <p><p>Copper Concentrate Processing About 80 % of primary copper production comes from low-grade or poor sulfide ores. After enrichment steps, </p></p> <h3>Copper Concentrate Processing</h3><p>About 80 % of primary copper production comes from low-grade or poor sulfide ores. After enrichment steps, the copper concentrates are usually treated by pyrometallurgical methods. Generally, copper extraction follows the sequence:<br />1. Beneficiation by froth flotation of ore to give copper concentrate<br />2. Two-stage pyrometallurgical extraction: smelting concentrates to matte; converting matte by oxidation to crude copper<br />3. Refining the crude copper, usually in two steps: pyrometallurgically to fire-refined copper; electrolytically to high-purity electrolytic copper</p><p>Sulfidic copper ores are too dilute for direct smelting. Smelting these materials would require too much energy and very large furnace capacities. The copper ore coming from the mine must be concentrated by beneficiation. The valuable minerals like chalcopyrite are intergrown with gangue. Therefore, in the first step the lumpy ore is crushed and milled into fine particles to liberate the individual mineral phases.</p><h3>Stone Crushing Plant</h3><p>Typical equipment for crushing to about 20 cm are gyratory and stone crushing plant(cone crushers). Then wet grinding in semi-autogenous rod or autogenous ball mills takes place. Size classification takes is performed in cyclones. In the next step of beneficiation, valuable minerals and gangue are separated by froth flotation of the ore pulp, which exploits the different surface properties of the sulfidic copper ore and the gangue. The hydrophobic sulfide particles become attached to the air bubbles, which are stirred into the pulp, rise with them to the surface of the pulp, and are skimmed off as a froth of fine concentrate. The hydrophilic gangue minerals remain in the pulp. Organic reagents with sulfurcontaining groups at their polar end, such as xanthates, are used as collectors in the flotation process. Additionally, modifiers like hydroxyl ions are used to select different sulfide minerals, for example, chalcopyrite and pyrite. Alcohols are used to stabilize the froth.</p><p>To obtain concentrates with highest possible purity and recovery rate, the flotation process usually consists of several stages which are controlled by expert systems. Various sensors for particle size, pH, density, and other properties are installed. In the first flotation stage, as much copper as possible is recovered in a rougher concentrate so that as little as possible goes to the tailings. To increase the copper recovery rate, often these tailings are leached with sulfuric acid. After regrinding, the rough concentrate is -2 of 11-cleaned in several flotation steps. After sedimentation in thickeners and filtration in automatic filter presses or vacuum filters (ceramic disk) the typical copper concentrate contains 25 – 35 % Cu and about 8 % moisture. The moisture content of the concentrate is a compromise between transporting water and avoiding dust generation during transport. Dewatered concentrates may heat spontaneously or even catch fire; therefore, appropriate precautions must be taken [47].</p><p>Copper concentrators typically treat up to 100 000 t of ore per day. They are located directly at the mines to achieve low transport costs. The copper recovery efficiency is over 90 %. About 95 % of the ore input goes into the tailings, which are stored in large dams near the mine and are used for water recycling to the flotation stages.</p><p>Separation of special copper ores such as those containing molybdenite or with high zinc or lead content (Canada) is also possible by flotation methods. Flotation of non-sulfide copper minerals is rare because these ores are mostly subjected to hydrometallurgical copper recovery, for example, heap leaching. In Zambia and Zaire, however, siliceous copper oxide ores are floated with fatty acid collectors, and dolomitic copper oxide ores are sulfidized with sodium hydrogensulfide and then floated.</p><p>Please talk with online customer services in our website to get detail info and price quotation about Stone Crushing Plant For Copper Concentrate Processing. 24/7 support for you! </p> </p> </div> Share this Ad | |
| Total comments: 1 | ||
| ||