756 resultados para Blast-furnaces


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Vita.

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Project Sedan.

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"Issued: October 2, 1964."

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"RFP-435 ; UC-38 Engineering and Equipment ; TID-4500 (34th Ed.)."

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"Resaerch...sponsored by the National Aeronautics and Space Administration under Contract no. NAS 3-2121."

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Mode of access: Internet.

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"August 1965."

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"The engineering authority of the steel industry."

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On verso: Phone Northway ... Graphic Arts Studios, Inc. Commercial Photographers, Graphic Arts Building, 41 Burroughs Avenue, Detroit, Mich.

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Mode of access: Internet.

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This paper outlines the methodology of blast fragmentation modeling undertaken for a green field feasibility study at the Riska gold deposit in Indonesia. The favoured milling process for the feasibility study was dump leaching,with no crushing of the ore material extracted from the pit. For this reason,blast fragmentation was a critical issue to be addressed by the study. A range of blast designs were considered with bench heights and blasthole diameters ranging from 4 m to 7 m and 76 mm to 102 mm respectively. Rock mass data was obtained from 19 diamond drill cores across the deposit (total drill length approximately 2200 m). Intact rock strength was estimated from qualitative strength descriptors,while the in situ block size distribution of the rock mass was estimated from the Rock Quality Designation (RQD) of the core.