2013年1月16日星期三

Screen Equipment is Applied in Concrete Aggregate


The high frequency ore screen separates materials according to above two points. In the grinding circuit, the high frequency ore screen controls the grinding equipment to do the classification. In addition, the screening material can meet the fineness requirement, which can reduce the energy consumption, improve the mill production, and increase the benefits. What’s more, installing the high frequency ore screen in the grinding circuit can screen out the coarse concentrate and send them back to the grinding mill to do regrinding, and select the screening material to improve the grade of concentrate.
Cement concrete comes into being since an earlier time, and it plays an important positive role for construction and building industry. However, with time goes, there are generating more and more concrete waste, which caused serious environmental problems. For example, we say it 2 billion m3 of concrete storage in China at present, which needs 0.8 billion tons cement and natural sand consumption is at least 3.6 billion tons. Statistics shows that we product 1 ton cement will use 0.95~0.98 ton clime, and 1 ton aggregates will discharge about 1 ton CO2. At the same time, it will let out a large amount of harzadous gas and dust. In aggregates proportion, natural sand takes much account. While as endless mining for decades, some natural resource can't meet large demand. What' more, natural limestone with industrial value just is able to keep supplying for 30 or 40 years. Over-exploitation has lead to earth losing and environment worsen. It has a bad effect to natural resources sustainable development. According to incomplete statistics, China generates annual construction waste 0.1 billion tons at present speed. If these construction wastes could be used in a proper way, it makes sense greatly. To a service-oriented brand integrity, as the professional manufacturer of complete sets of mining machinery, like china jaw crusher, Henan Hongxing is always doing the best in products and service.high frequency vibrating screen: http://www.crusher-machine.com/n220.html
Recycled concrete aggregate refers to that we make use of old concrete waste to produce artificial sand. The production process includes selection, crushing and screening, and artificial sand has a certain physical performance and certain particle size. In the process, vibrating screen will remove foreign materials, and then the waste past through crushing by jaw crusher. Finally, the particle size, roughness, density and water taking property are decided by customers' demands. Therefore, the vibrating screen is also made object to users' demands. It may be no easy to determine number of screens since the different grain size. As there are different measuring standard from country to country, the measure unit 'mesh' sometimes is difficult to come into agreement.
The mining industry is one of the biggest users of vibrating screen technology. Taking ore and minerals from the ground results in many impurities, so these organizations load goods into a screen until dirt and non-valuable rocks are shaken from material such as coal, iron and ore. Screens also are utilized in manufacturing, especially when metal items, such as ionised bolts and screws that need to be submerged in a bath, need to be dried. Here, full containers of liquid and metal can be poured through the screen and separated with the vibrations to ensure that they dry completely. Disparate industries such as archaeology, metallurgy and construction also utilize vibrating screen technology to get their jobs done.

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