(PDF) ORE DILUTION AND ORE RECOVERY ResearchGate
An idealized view of the various sources of dilution at different stages of mining and milling. For each dilution source, the diagram indicates that some ore is potentially lost and some waste is
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An idealized view of the various sources of dilution at different stages of mining and milling. For each dilution source, the diagram indicates that some ore is potentially lost and some waste is
However the method has the disadvantages of greater dilution and ore loss compared with some other mining methods. Blasting fragmentation and gravity flow are known to influence dilution and recovery but currently the interrelationship between these factors is neither fully understood nor quantified.
Longwall mining method: this method is suitable for mining bedding deposit with a dip less than 35#176;, 34 m thickness and poor roof. The advantages of this method are simple layout, high labour productivity, good stope ventilation and low dilution and loss. The ore recovery is
dilution and mining recovery factors have been applied post geological block model interrogation to generate final mining diluted and recovered ore tonnage and grade that meet the nominated cutoff grade parameters. Mining Method The mining methods assumed for the mine design and life of mine schedule are in line with
Mining methods such as block caving, sublevel stoping and roomandpillar have mining methods which are more predictable, where dilution can be modeled using empirically generated equations. The major factors which have a direct effect on dilution are as follows: Mine Depth: Methods with greater selectivity exhibit lower dilution Rock Competency : More competent rock will be less susceptible
the mining dilution factors. mining recovery is estimated for each stope industry standard for copper sulphide Edition mining dilution factors this method of extraction will maximise the business reference model is of equipment * mining dilution amp; methods.
Standard Extraction Dilution And Recovery Factors For Mining Methods; Standard Extraction Dilution And Recovery Factors For Mining Methods. Jaw Crusher. Ball Mill. Sand Making leads to increased dilution and ore losses Non adherence to Standard mining echelon Mechanized Continuous Retreat mining method requires that for two adjacent
Standard Extraction Dilution And Recovery Factors For Mining Methods. We are a largescale manufacturer specializing in producing various mining machines including different types of sand and gravel equipment, milling equipment, mineral processing equipment and building materials equipment.
Mining recovery is estimated to average 100 and mining dilution 0. The cutoff grades and pit design are considered appropriate based on long term gold prices of US1,320oz, estimated mining costs of per tonne of material, total processing and process GA costs of per tonne of ore, and refinery costs net of pay factor of US6
A common indicator for excessive dilution is the usage of planning adjustment factors (mass and/or grade multiplier). These could typically be block model factor (typically grade), mine design factor (typically tonnes and grade), mine call factor / schedule factor (typically tonnes and grade), process factor (typically contained metal), etc.
dilution prediction, the NVD method also includes strategies for narrow vein dilution minimisation generally, including; filling, cablebolting, stress relaxation, extraction sequencing and blast overbreak. INTRODUCTION Dilution can be defined as the contamination of ore by nonore material during the mining process (Wright, 1983). Dilution is
#0183;#32;What you are describing is an quot;external standardquot; method. For an Internal STD method you should be adding a known quantity of the IS to the samples and standards immediately prior to analysis. Internal STDs added prior to extraction are now often referred to as quot;surrogates). Their recovery would be determined against unextrcted spikes.
The writers'' objective was to gain a better understanding of the factors that influence dilution and ore recovery in longitudinal sublevel caving, mainly as the knowledge base for this particular mining method is limited when compared to other bulk mining methods. The
to estimate Mining Recovery and Mining Dilution are; parent cell size in relation to the proposed mining method and production rate. cell orientation in relation to the direction of excavation, sub cell supporting the size and complexity of wire frames, unfolded models, while aligning cell orientation to
Recovery and dilution usually are interrelated; with some methods of stoping a high recovery involves contamination of the ore from the walls or capping, and often clean ore can be obtained only by leaving some ore in the mine. In openstope mines the greatest loss of ore is that tied up in pillars left for support of the back or hanging wall. The amount of ore thus left varies considerably
Mining is the extraction of valuable minerals or other geological materials from the earth from an orebody, lode, vein, seam, or reef, which forms the mineralized package of economic interest to the miner.. Ores recovered by mining include metals, coal, oil shale, gemstones, limestone, dimension stone, rock salt, potash, gravel, and clay. Mining is required to obtain any material that cannot
standard extraction dilution and recovery factors for mining methods INTERNATIONAL UNION OF PURE AND APPLIED CHEMISTRY Formal legislative requirements with regard to the use of recovery factors also vary sectortosector.
The Importance Of Dilution Factor For Open Pit Mining Projects Dilution increases the operating costs in the mill by increasing the tonnage of material to be milled. By better understanding the root causes of the dilution, quanitiying it, and planning accordingly, it can be controlled and reduced.
Proper mine designs and implementation of mining standards help in maximizing ore recovery and reducing dilution. Reconciliation statistical studies of 2014 and 2015 indicate that there has been ineffective stope designs and improper implementation of stoping standards which has led to reduced stope recovery and increased dilution at Mufulira mine.
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