Especially in recent years, the construction industry shows remarkable growth, the demand of sand is very large. So here we focus on granite artificial sand production line. Granite is a kind of representative raw material to make sand.As the decreasing of natural sand resources and the protection policies of the government, the price of natural sand are getting higher and higher. In this case, more and more investors start to turn their eyes on artificial sand making.
If you are interested in quartz rock artificial sand production, and want to know more about the quartz rock crushing and sand making equipment, please contact the online operator for more info.
2002; Van Berkel 2000) used LCA methodology to assess the environmental impacts of various metal production processes practiced either currently or potentially in Australia. 2016) identified a range of opportunities and few limitations on the use of water footprint assessments in mining industry. For instance, CSIRO Mineral (Norgate and Jahanshahi 2004; Norgate et al. 2006; Lunt et al. Among the opportunities are water footprint and LCA can be used to provide a more holistic assessment of the benefits and drawbacks of technologies being developed and deployed in the mining industry through the consideration of indirect (supply chain) impacts; improve the usefulness and relevance of water related data disclosures that are presented by corporate sustainability reports. 2000; Giurco et al. (Northey et al. 2004b; Norgate and Rankin 2000; Norgate and Rankin 2001; Norgate and Rankin 2002) and others (Giurco et al.Despite the large environmental impacts associated with the mining industry, there have been relatively few attempts to quantify water-related impacts from the industry using these methods. Particularly for companies that have facilities in multiple regions with differing water contexts. 2004a; Norgate et al.
27 Ω.Finite conductivity of the base material: Due to the high frequency, the penetration depth of the electromagnetic field into the metal is very small. Assuming the proposed center frequency of 237.26 µm and the surface resistance is 0.9 GHz as well as the conductivity of brass, the skin depth is δbrass = 0.
Tibet was excluded in our research for the lack of data available. The eastern China area contains most of the coastal regions with a relatively developed economy, while the central area is China’s traditional agricultural base. Our data thus contained 30 regions, which were usually grouped into three areas according to the traditional division, that is, eastern, central, and western China, as shown in Table 2.There are 31 administrative regions of provinces, autonomous regions, and municipalities in mainland China. Western China area is usually seen as an underdeveloped area .
Alkaline extraction procedure primarily adopts Na2S leaching followed by membrane electrowinning . Pyrometallurgy routes for extraction of antimony typically contain roasting-volatilizing-reducing process, bath smelting-continuous fuming process  and direct smelting process [4,5]. While hydrometallurgy technologies for antimony separation can be classified into alkaline extraction procedure and acidic extraction process according to property of solvents. Generally, the technologies for producing antimony mainly comprise pyrometallurgy and hydrometallurgy [1,2]. At present, due to the lengthy flow, poor efficiency, high running cost and large amount of wastewater treatment during hydrometallurgical separation process  of antimony, most of antimony smelteries in China use traditional volatilization smelting process in blast furnace to volatilize the resultant antimony trioxide, and then reduce the trioxide with carbon to metallic antimony in reverberatory furnace.China has abundant reserves of antimony resource and it’s also the largest producer of antimony in the world. Acidic extraction process mainly includes FeCl3 leaching-electrowinning and chlorination-distillation procedure . Therefore, renovation and innovation in traditional antimony metallurgy technology are imperative [8,9,10]. However, this process has its obvious drawbacks, such as serious environmental pollution and large energy consumption, which restrict its popularization and application, especially under the background of increasing stringent environmental standard.
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