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Explosive Characteristics and Performance

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 Characteristics and Performance

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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Project Title: Construction of Tehran-Shomal Highway Employers: Meli sahteman co., Taloun co., Sazeh, mekanik co., Chinese STA Consortium, orsa Sakhteman co., and Pournam co. Subject of the contract: Construction of explosive magazines, Supply, transportation and warehousing of Explosive materials, execution of blasting operations for Construction of Tehran – shomal Highway

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explosives – Mining and Blasting

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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Physics and Technology of Nuclear-Explosive Materials

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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Influence of natural discontinuities and mechanical ...

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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(PDF) Decreasing Ore Grades in Global Metallic Mining: A ...

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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