LIFE-CYCLE ASSESSMENT
diesel consumption & explosive processes Construction phase-Earth works: diesel consumption -Crane: electrical consumption-Machines and heating: electrical consumption -Workers journeys: diesel and petrol consumption from cars ----SYSTEM BOUNDARIES Raw material extraction Material manufacturing Transport to site Building maintenance
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The capacity of the crusher is 200 t/h. From the crusher, the 0,2 m size fragments are required. For this capacity the manufacturer of the crusher plant recommends, Technical Gazette 18, 1(2011), 79-86. as an ideal entry material, fragments to the size of 0,3 m.
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Formulation / Raw material quality Storage Container / Packaging Temperature and humidity of storage environment Chemical Stability Contamination Characteristic signs of bulk explosive deterioration include: Crystallization Increased viscosity and/or change in density Color change (e.g. bulk emulsions go cloudy as crystallization increases)
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material is screened from the output and returned for another pass through the crusher. D 50 — Denotes the output size is 50% smaller than a specified opening. Feed — Input to the crusher. Feeder — A device that regulates and distributes material into the crusher. Fines — Material with particle size smaller than a specified opening.
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Explosive material crusher explosive wikipedia an explosive material also called an explosive is a reactive substance that contains a great amount of potential energy that can produce an explosion if released suddenly usually accompanied by the production of light heat sound and pressure.
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ingredients of the explosive Energy calculated by Thermodynamic Codes (ideal) (i.e. computer models of the detonation chemistry and energy of the reactions) Usually quoted in MJ/kg of explosive AWS of ANFO is 880 cal/g for 94% AN and 6% Fuel Oil Explosive efficiency varies from 35% to 90% of maximum energy
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The explosive column illustrated in Figure 8-6 on the right will produce the best fragmentation. EXPLOSIVES ECONOMICS The economic analysis of the use of explosives is an important part of blasting operations in mining and construction. Explosives are energy, and the efficient use of this energy is a major factor in keeping rock blasting
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When priming blasting agents with holes up to 2 1/2 inches in diameter, a full cartridge of high velocity explosives like 60 percent ammonia gelatin, gels, slurries, or cast primers with a blasting cap, is a sufficient charge. For larger holes, the priming requires much more care, especially if the hole is wet or decked charges are used.
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Crusher Operation • Relation between Feed size and Shape – The greater reduction ratio the worse particle shape. – Inter particle breakage improves shape. When crushing a bed of material weaker particles will break first. Flaky or elongated particles are weaker then round. – Breaking round particles gives flaky material. F l a k i n e s ...
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The critical mass can be made smaller than the bare-sphere value by surrounding the nuclear-explosive material with a "tamper" composed of materials that reflect neutrons. Note also that the implosion approach compresses the NEM to higher than normal density, thereby also reducing the critical mass.
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Natural discontinuities as well as mechanical properties are the difficult-to-control parameters that significantly influence the fragmentation of marble after blasting. In Central Africa, the Bidzar quarry is the only one producing marble, plagued for decades by block fragmentation problems, requiring multiple blasts that cause huge costs and environmental problems. The objective of this ...
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regarding energy use and ore grade. Therefore, decreasing or e grades is no longer a theoretical issue. but a global reality in the case of mines in …
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