Metallurgy & Mineral Processing 2016

Issue: 
#53
gold inventory in dollars
SRK News | Issue 53 : Metallurgy and Mineral Processing A4 | Letter It is routine in a processing plant to sample the feed, tailings and product streams in order to make a metallurgical balance – to account for the metal processed and where it ended up. For gold plants,...
Process Flow Diagram
SRK News | Issue 53 : Metallurgy and Mineral Processing A4 | Letter Over the decades, with decreasing ore deposit grades, miners have turned to economies of scale and bulk mining to gain advantage. This has resulted in an inherent dilution of feed to the mill. However, a point is...
SRK News | Issue 53 : Metallurgy and Mineral Processing A4 | Letter In conducting technical due diligences, SRK’s recent experience has found the majority of projects to be “metallurgicallychallenged”. This is often due to low grade or complex mineralogy or at times, ore hardness; sometimes it is a matter...
SRK News | Issue 53 : Metallurgy and Mineral Processing A4 | Letter The Gold Fields Granny Smith mine in Western Australia has a long history of collecting high quality, grinding survey data from which to make circuit improvements. This started when the semi-autogenous grinding (SAG) mill was originally operating...
Do these stages belong in the process plant of water treatment plant?
SRK News | Issue 53 : Metallurgy and Mineral Processing A4 | Letter Take a look at the flowsheet above. Can you tell if this is a step in the process plant or a water treatment plant? Mining operations are building dedicated water treatment plants costing between 10s and 100s...
Lithium rich brine source - South America
SRK News | Issue 53 : Metallurgy and Mineral Processing A4 | Letter One of the few positive commodities in 2015 was lithium. Improvements in the performance and durability of lithium powered batteries have made electric cars a reality. The search for suitable raw materials has galvanised many junior mining...
Vanadinite Pb-Cl-vanadite mineral, also and ore of vanadium, Atlas project, Morocco
SRK News | Issue 53 : Metallurgy and Mineral Processing A4 | Letter In cooking, some ingredients have such an inherently strong taste that a few grains can be detected on even the most insensitive of palates. Chili peppers are a good example and whereas in a stew they can...
Iron Ore Particles, Zanaga Project, Republic of Congo
SRK News | Issue 53 : Metallurgy and Mineral Processing A4 | Letter Iron ores come in come in many shapes and sizes (and mineralogies), so there is no one size fits all approach to beneficiation. For magnetite ores, it is typically necessary to liberate the individual magnetite grains from...
Plant Sampling Installations
SRK News | Issue 53 : Metallurgy and Mineral Processing A4 | Letter The AMIRA “Metal Accounting Code of Practice and Guidelines” (2007) has established best practice in process plant metal accounting. The code is based on the “check in, check out” concept; sampling the mass flow of the commodity...
Principal Consultant Anton Bloem is presenting at CIM 2017: Leveraging Rock Mass Characterization
SRK News | Issue 53 : Metallurgy and Mineral Processing A4 | Letter Mining involves extracting a desired commodity, like gold, from a rock mass – in which the volume of waste significantly exceeds that of the mill feed. Within the mill feed, there are some fractions that are more...
Solution mining well, Africa
SRK News | Issue 53 : Metallurgy and Mineral Processing A4 | Letter When water contacts a solid, a portion of the solid can be dispersed or even dissolved within the water (depending on the chemistry and solid form). This reaction has challenged many miners over the centuries and, back...
Truck in open pit mine
SRK News | Issue 53 : Metallurgy and Mineral Processing A4 | Letter The objective of strategic mine planning is to maximise the near-term cash flow of a mining project. A mine operator needs to maximise the discounted cash flow and net present value to help secure low cost financing...
Crushed Heap Leach Pads of Copper Ore
SRK News | Issue 53 : Metallurgy and Mineral Processing A4 | Letter At first glance, heap leaching can appear an extremely simple technology; however, without proper characterisation, engineering and design, heap leaching faces significant issues that can affect the overall economic viability of the project. Combined with compartmentalising the...
On site at Montagne d'Or gold project
SRK News | Issue 53 : Metallurgy and Mineral Processing A4 | Letter During 2016, SRK undertook a feasibility-level development program to describe the metallurgical process for Nordgold’s Montagne d’Or gold project located in French Guiana. The objective was to develop a practical process flowsheet and define the process operating...
SRK News | Issue 53 : Metallurgy and Mineral Processing A4 | Letter Gold reconciliation audits are often motivated by the following question: Did the measured gold ever exist? • If yes, locate the gold if it is still within the circuit, or identify the likely route by which it...
Left to right: Gold from Ten Mile Mine, Nevada; Gold, Ashanti, Ghana; Gold, Empire Mine, California
SRK News | Issue 53 : Metallurgy and Mineral Processing A4 | Letter A diagnostic leach test can be very useful to qualitatively assess how gold occurs within the ore and the extent to which it may be refractory. Several different permutations of diagnostic leach tests depend on specific objectives,...
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