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First application of the thin-layer process on copper sulfide ores (chalcocite) contains about 1% Cu. In 1994, the design capacity was of 75,000 tons/year which was increased to 80,000 tons/year subsequently. Process modifications included irrigation using preheated raffinate solutions, use of semiburied drippers, bottom aeration, and grasshopper type stacking. On and off reusable pads are used. Temperature control at 18C25C was essential with leach recovery targeted at about 80% within about 500 days

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Due to the superiority of metal-doped ZnO compared to TiO 2 , the Zn-M (M=Al 3+ , Ga 3+ , Cr 3+ , Ti 4+ , Ce 4+ ) mixed metal oxide solid solutions have been extensively studied for photocatalytic and photovoltaic applications. In this work, a systematic research has proceeded for the preparation of a zinc-aluminum oxide semiconductor as a photoanode for the dye-sensitized solar cells (DSSCs) by a simple pyrolysis route with the Zn-Al layered double hydroxide (LDH) as a precursor. The Zn-Al oxide solid solution has been applied for DSSCs as an electron acceptor, which is used to study the influence of different Al content and sintering temperature on the device efficiency. Finally, the Zn-Al oxide solid solution with calcination temperature 600C and Al 27 at.% content exhibits the best performance. The photoelectric efficiency improved 100 times when the Al 3+ content decreased from 44 to 27 at.%. The Zn x Al y O solid solution show a reasonable efficiency as photoanode materials in DSSCs, with the best preliminary performance reported so far, and shows its potential application for the photovoltaic devices. Copyright 2018 Elsevier Inc. All rights reserved

Miners who spoke to Human Rights Watch repeatedly deplored the ineffectiveness of the Mines Safety Department (MSD), a government body under the Ministry of Mines and Minerals Development that is based in the Copperbelt town of Kitwe. The Mines Safety Department employs inspectors who are meant to ensure that the various mining operations conform to the strict regulations under Zambian law, but it appears ill-equipped or unwilling to play the strong role needed to ensure that mining operations protect miners health and safety

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Moisture content of the raw material should be less than 15%. Materials size required before feeding into coal briquette machine should be less than 5mm. 4. Fast, easy and convenient routine maintenance can reduce the downtime

First application of the thin-layer process on copper sulfide ores (chalcocite) contains about 1% Cu. In 1994, the design capacity was of 75,000 tons/year which was increased to 80,000 tons/year subsequently. Process modifications included irrigation using preheated raffinate solutions, use of semiburied drippers, bottom aeration, and grasshopper type stacking. On and off reusable pads are used. Temperature control at 18C25C was essential with leach recovery targeted at about 80% within about 500 days

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2020-7-7Roller Crusher. Roller crusher is widely used for fine or superfine crushing in the industries of mining, construction materials, metallurgy, chemical industries and so on. It can crush all kinds of materials under middle hardness, such as ore, rock, coke, coal, clinker, ceramic raw materials, slag, refractory materials, chemical materials and so on

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When the mode or mechanism of toxic action is uncertain, or unknown, or metabolic factors may play an important role, and/or when a broad range of responses to chemical exposure is observed, there is concern that there may be large differences in susceptibility between individuals. In those cases, an intraspecies UF of 10 may be applied

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www.chanakyfoundation.in/briquette-machine/fijhiBriquette machine is used to make biomass briquettes out of any agriforest waste production range from 250 2500 kgh 40mm100mm size explore briquette machine dualfeedtm combo machine dualfeed tm combo machine is

2020-7-7Roller Crusher. Roller crusher is widely used for fine or superfine crushing in the industries of mining, construction materials, metallurgy, chemical industries and so on. It can crush all kinds of materials under middle hardness, such as ore, rock, coke, coal, clinker, ceramic raw materials, slag, refractory materials, chemical materials and so on

When the mode or mechanism of toxic action is uncertain, or unknown, or metabolic factors may play an important role, and/or when a broad range of responses to chemical exposure is observed, there is concern that there may be large differences in susceptibility between individuals. In those cases, an intraspecies UF of 10 may be applied

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