tungsten mine waste
Evaporative cooling performance of alkali-activated tungsten mine waste mud mortars
... The increase on energy demand associated to the substantial use of air conditioning systems, requires careful consideration of passive cooling strategies with evaporative cooling to be a useful technique for this ...
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Research on strength properties of geopolymer based on tungsten mine waste and recycled ground glass
... Moreover, tungsten waste mud consists of relatively large amount of iron and potassium oxide which according to Pacheco- Torgal et ...that waste mud shows potential for use in geopolymer technology ...
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Alkali-activation of tungsten mining waste mud blended with waste glass: reactivity, performance and innovative applications
... tungsten mine coarse wastes (TCW), metakaolin (MK), granulated expanded cork (GC) and aluminum powder ...(C-TMW) tungsten mine waste ...
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REPOSITORIO INSTITUCIONAL DA UFOP: Financial guarantee for mine closure.
... September of 2001 terrorist attack and bankruptcy process of big companies as ENRON Corporation, many of the security companies have declined to work with mining closure guarantees because of the highest risk involved ...
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Relaxor nature in lead-free Sr5LaTi3Nb7O30 tetragonal tungsten bronze ceramics
... the structure change during the formation of polar nanore- gions and the following freezing process of flipping and breathing contributions. However, all the lattice parameters show opposite tendency below 100 K. It ...
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Mine water treatment with limestone for sulfate removal.
... treating mine waters with sulfate concentrations below the values defined by gypsum solubility (1200–2000 mg/L) and where only more expensive processes are ...
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Modelagem: Zero-waste
... Esta dissertação conclui que o desperdício têxtil gerado pela indústria do vestuário é cerca de 15% do tecido utilizado, daí ser necessário adoptar métodos de redução de d[r] ...
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USE OF STEEL SLAG TO NEUTRALIZE ACID MINE DRAINAGE (AMD) IN SULFIDIC MATERIAL FROM A URANIUM MINE
... The concentrations of Ca, Fe, S, Al and Mn in the leachates were higher than of other elements (Table 6). The mobility of Ca increased with the limestone doses, which was expected, as this element is a major constituent ...
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Photochromism in tungsten oxide thin films of different compositions.
... IN TUNGSTEN OXIDE THIN FILMS OF DIFFERENT COMPOSITIONS. Tungsten oxide thin films with three different compositions were deposited by reactive sputtering in an oxygen-argon ...
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Gas Tungsten Arc Welding of NiTi Shape Memory Alloy
... Since the welding torch had to be manually activated during the entire welding process, two major problems were detected with the TIG welding machine: speed variation of the torch and variation of the distance of the ...
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Sputtering on the production of tungsten carbide based composites
... An extensive work has been performed in the past on WC/Co hard metals, due to their importance for mining tools, tool inserts and other components where wear strength is important. It is well established that ...
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Electrothermal atomic absorption spectrometry with tungsten coil: a critical re-view.
... O crescente interesse na utilização da técnica de ETAW-AAS para a determinação de elementos ao nível de traços originou a pre- sente revisão da literatura, na qual diferentes trabalhos s[r] ...
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Gas tungsten arc welding of as-rolled CrMnFeCoNi high entropy alloy
... Gas tungsten arc welding was performed using a TELWIN, model Technology TIG 182 AC/DC-HF/LIFT equipment. Welding was per- formed using direct current and straight polarity so that full penetration and defect-free ...
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The impact of payload truck factor use in mine performance reports for an open pit copper mine in Brazil
... This study might be applied in other operations under due adaptations for tracking inconsistencies on database purposes, which could permit better er- ror management and sensitively minimize impacts over mine ...
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Valorization of agroindustrial waste
... the waste treatments technologies were based in common activities like landfill or the incineration, which aim at the elimination of the ...solid waste used to be landfilled, liquid waste going to ...
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Small Incentives Matter: promoting waste recycling among household solid waste generators
... solid waste is a public health and environmental ...Solid Waste National Policy in 2010, recycling has be- come a well-defined political objective at all levels of gov- ...
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Evaluation of heating programs for electrothermal atomic absorption spectrometry using a tungsten coil.
... A TUNGSTEN COIL. A tungsten coil atomizer was used to investigate the effect of heating programs with constant or variable drying temperatures on the atomization of Al, Cd, Cr and ...the tungsten ...
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Gas Tungsten Arc Welding of Cu-Al-Mn Shape Memory Alloys
... gas tungsten arc welding (GTAW) has the potential to promote joining of this class of alloys and can be employed specially in applications where larger thicknesses are required, since it can generate deeper ...gas ...
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Synthesis and characterization of tungsten trioxide powders prepared from tungstic acids
... resonance centred at 6.2 ppm. The broad peak is assigned to bulk water molecules coordinated to tungsten atoms and the sharp lines to two kinds of mobile surface hydroxyls. Spectral deconvolutions (carried out ...
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Strategic planning for waste management: A case study of Shiraz waste management
... In this paper, we have presented an empirical study to find strength, weakness, opportunities and threats against a waste management unit located in city of Shiraz located in south west of Iran. We have asked some ...
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