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The motor will be upgraded to 22 MW. Oversize pebbles from the SAG mill are returned to the distribution bin; • Secondary milling in three ball mills, with the two original mills …
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Abstract: Monitoring of fracture limits, cave backs and drawpoint fragmentation at both the Grasberg Block Cave (GBC) and Deep Mill Level Zone (DMLZ) caves at PT Freeport Indonesia's operations suggest that Cave Propagation Factor (CPF), weak and persistent vein intensity and hydrofracture spacing exert a strong control on the caving rate and …
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HPGR equipment ahead of the existing SAG Mill, and converting existing Pebble Recycle Crushers to Secondary Crushers and adding additional ball milling capacity to the …
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Ridgeway Deeps - Secondary Crushing Plant - Copper/Gold (Newcrest Mining) Associate Lecturer University of Queensland Jul 2009 - Nov …
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This paper discusses the fragmentation prediction and assessment methodology employed at the Ridgeway Deeps (RWD) and Cadia East PC1 (CEPC1) cave …
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Ridgeway Deeps employed an advanced undercutting strategy above an offset Herringbone extraction level layout with a drawbell spacing of 30 x 18m and a vertical separation of 18m, floor to floor, between the undercut and extraction level, as shown in Figure 1. Figure 1: Advanced Undercut Establishment section. 4 | P a g e.
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Two systems of 54-in. conveyors deliver the ore to the two secondary ore bins of the concentrator. One conveyor of each series is equipped with a stationary magnet, which collects tramp iron that escapes from the secondary crushing plant. These magnets have been useful in decreasing damage to the feeder belts of the grinding section.
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2.1 Energy. Rock drilling, blasting, and comminution (crushing and grinding) consume a vast amount of energy in hard rock mines. As mentioned in Sect. 1, statistics from hard rock mines indicates that drilling and blasting consumes 2% and comminution does 53% of the total energy input in the whole production chain from mining to mineral …
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This paper discusses the fragmentation prediction and assessment methodology employed at the Ridgeway Deeps (RWD) and Cadia East PC1 (CEPC1) cave operations.Prediction of drawpoint fragmentation was based on an iterative process, which relied on an improved quantitative and qualitative understanding of the rock mass as the …
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The back analysis of Newcrest Mining Limited's Ridgeway Deeps operation using the BCMSV enabled the phenomenon of pulses in the rate of seismic activity to be identified …
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3.1.4 Ridgeway Deeps 3-3 3.1.5 Cadia East Exploration 3-3 3.2 ENVIRONMENTAL PLANNING AND ASSESSMENT ACT, 1979 3-4 3.2.1 Overview 3-4 3.2.2 Application of other ... Consent (DA 44/95), a series of secondary approvals were obtained by CHPL. These included: • ML 1405 issued by the NSW Department of Mineral Resources (DMR) …
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of the Ridgeway sublevel cave. The success of that mine led to a significant expansion into block caving operations, first at Ridgeway Deeps, and then to the now established Cadia East operations. What makes Cadia unique is the high-stress, hard rock mining conditions combined with the ability to
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Milling at ridgeway deeps secondary crushing iron ore crushing plant nickel crush grinding plant coal ball mill in meknes morocco africadescription of airswept coal millfote machinery coal mill is a kind of ball mill which is often used to crush and grind coal bricks into powder so it is also called coal grinding mill coal mill is the. Nickel ...
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The key additions were a secondary crusher to reduce the semi-autonomous grinding (SAG) mill feed size and tertiary grinding for reduction in flotation feed size to maintain …
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The draw bin method was first implemented in a feasibility study at Telfer mine, Australia, and then used at Ridgeway Deeps, Australia (Allman, 2002, in Jamieson, 2012). The method is an improvement on the dilution entry method and incorporates the recovery curves from the primary, secondary, and tertiary recoveries, i.e. first, second, and ...
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Ridgeway Deeps is a block cave (BC) located down dip of the operating Ridgeway sublevel cave (SLC) mine. The BC is located approximately 210 m vertically below the …
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Concentrator 2 was commissioned in 2002, and had a target rate of 4 Mt/a, and currently treats approximately 7 Mt/a. In mid-2008, the facilities were upgraded to suit predictions of harder and fines-deficient ore from Ridgeway Deeps block cave mine. The upgrade included installation of a secondary crushing circuit and additional regrind mill power.
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The depth at which you are stabilizing will determine the size of roller required. Typically, base stabilization ranges from 6 to 14 inches. "Our stabilizers will mix up to 24 inches deep, but you can only process how deep you can compact," White said. "Most contractors' rollers can compact around 10 to 12 inches.".
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The Ridgeway Concentrator at Newcrest Cadia was commissioned in 2002 as an ABC circuit to treat the ore from the Ridgeway sublevel cave (SLC) at around 5 MTPA. Consisting of a single pinion 32' autonomous grinding (AG) mill and a single pinion 7 MW ball mill, it was a much smaller plant than the adjacent Cadia Hill Concentrator. …
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Oversize fragments in sublevel caving. In sublevel caving, oversize fragments are highly undesired because they can obstruct the material flow in the blasted rings and cause hazardous hang-ups, leading to safety issues and reduced ore recovery if the hang-ups cannot be removed (Danielsson et al. Citation 2017).They can significantly …
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with a low aspect ratio similar to the …Milling At Ridgeway Deeps Secondary Crushing. Block Caving And Primary Crushing crusherasia ridgeway deeps mine block caving pdf Block and Sublevel Caving REGISTRATION 2005· Due to the abrasive nature of the slagcrushers in oman mining crusher impact and shear forceATIEMAR Heavy Industry …
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Deep Mill Level Zone (DMLZ) is the deepest block caving below DOZ. DMLZ, located at elevation 3.125–2.590 msl, has a reserve of about 472 million tons, 0.85% copper and 0.72 g/ton gold. ... Secondary deposit such as alluvial placer transported and sedimented on river meander is extracted by local miners using artisanal or traditional …
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milling at ridgeway deeps secondary crushing Explore Our Products Here AFB has a full coverage of coarse crushing, intermediate crushing, fine crushing and sand-making, sand-washing, feeding, sieving, conveying equipment …
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After closed-circuit secondary crushing, the SAG mill feed 80% passing (F80) size was 25 mm to 30 mm. Installed grinding power is split equally between the two mills with the SAG mill fitted with a variable speed drive (VSD). SAG discharge screen oversize ('pebbles' or 'scats') was recycled through an 185 kW pebble crusher.
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The term "secondary crushing" has become well established and familiar through long usage; it applies to the crushing stage, either single or multiple, which follows immediately after the primary crusher, taking all or a portion of the product of the primary crushing stage as its feed.The term should not be used, as it sometimes is, to designate …
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Crushing takes place between a stationary jaw plate and a moving jaw plate. The moving jaw plate is mounted on the pitman, which is given a reciprocating motion. Crushing takes place when the pitman moves toward the stationary jaw. There are two main types of jaw crushers – single toggle and double toggle.
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Secondary crushing of the SAG mill feed, when implemented correctly, has been shown to significantly reduce SAG mill and total circuit specific energy. Very fine feed, good process control and or the presence of some coarse rock in the feed (partial secondary crushing) has been required to make a successful project. The reason secondary ...
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Our last schematic represents a CLOSED CIRCUIT. This one involves both SECONDARY and TERTIARY crushing. This circuit is employed where either the tonnage or the work index of the ore is high enough to require that the crushing be done in stages. Again the ore will come from a Primary crusher and be scalped. The coarse material will …
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crushing plant, the secondary crush er provides a feed to the third crushing stage at d 80 = 35 mm and the tertiary crusher(s ) provide a feed, having d 80 = 8–9 mm, for milling in a closed circuit.
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The Future – Ridgeway Deeps • 45 Million tonnes - 1.15 g/t Au - 0.45% Cu • 236m high Block Cave • 2 x Jaw Crushers • Extension to existing conveying system (1.9km) • 5.8 Mtpa production rate • Mine life to 2019 The Future – Ridgeway Deeps Undercut Level • 'Crinkle Cut' design • 'Trident' access to increase
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