tag:blogger.com,1999:blog-6908362959739425575.post4845914508406580564..comments2024-03-26T21:47:45.016+00:00Comments on MEI's Barry Wills: CEEC Medal Award reflects the growing importance of ore sortingMEIhttp://www.blogger.com/profile/14834780351452765156noreply@blogger.comBlogger12125tag:blogger.com,1999:blog-6908362959739425575.post-66169786966519222442015-07-01T08:52:52.887+01:002015-07-01T08:52:52.887+01:00The discussion continues on LinkedInThe discussion continues on <a href="https://www.linkedin.com/grp/post/1945393-6018668687043686402" rel="nofollow">LinkedIn</a>MEIhttps://www.blogger.com/profile/14834780351452765156noreply@blogger.comtag:blogger.com,1999:blog-6908362959739425575.post-17686599746428417182015-06-30T18:27:56.007+01:002015-06-30T18:27:56.007+01:00I would be interested to know if the proposed tech...I would be interested to know if the proposed technologies will go as far back as the pit itself for determination of economic processing ore grades - "hot spotting" the deposit. This will change the economic indicators of stripping ratios greatly and make some large deposits unworkable if the high grade is selectively mined. At that level the possibility of throwing out "parts of the baby with the bath water" becomes the issue. A target for presorting of the ore by grade should have a very low cut off ore grade - that alone would be more prudent?<br />Mark Addison - Arizona.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6908362959739425575.post-122823418573976732015-06-29T22:49:06.380+01:002015-06-29T22:49:06.380+01:00It is very interesting to know.
What method is use...It is very interesting to know.<br />What method is used to ore sorting (TOMRA Sorting Solutions GmbH)? Photometric (Color), X-ray fluorescence method (XRF), method (XRT)? <br />Natalia Petrovskaya<br />nataliapetrovsky@gmail.comAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-6908362959739425575.post-90452523921290365182015-06-29T17:01:49.077+01:002015-06-29T17:01:49.077+01:00Hermann: I agree with you, it's been a long ro...Hermann: I agree with you, it's been a long road to get the base and precious metal miners to be aware of SBS technology. It will be an even longer road to gain the investors trust that it is not a waste of funds to adopt SBS to build a smaller Mill, reduce the milling power costs, water consumption, size of the tailings and waste water facilities. What we need is a company like Phelps-Dodge which went with SX-EW technology for copper in the 1980's instead of bigger mines and mills, and survived. This time it could be SBS! What we also need is lower operating costs for base metal SBS. The value per ton of ore is generally too low to allow the cost of sorting plus separate discard of sorter reject. ORETOME Limited has been doing some testwork along these lines, google "Van Weert, humberetc" for (scanty) details. On the mine strategy side, the industry has to get rid of the tonnage bonus for Mine Superintendents, institute a bonus instead for (metal) value delivered to the MIll. The system should reward quality, not quantity!<br />Gus Van Weert, UBC, CanadaAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-6908362959739425575.post-57151947492726460922015-06-25T10:05:35.295+01:002015-06-25T10:05:35.295+01:00I fully agree that rejection by any technique befo...I fully agree that rejection by any technique before treating the ore in a conventional beneficiation plant is a "must and highly profitable". <br />Just for my information, I wanted to know where it is used for low grade (say <2% Cu in the r.o.m.) ore deposits <br />Rao,T.C., IndiaMEIhttps://www.blogger.com/profile/14834780351452765156noreply@blogger.comtag:blogger.com,1999:blog-6908362959739425575.post-73561416466617435662015-06-25T10:03:44.713+01:002015-06-25T10:03:44.713+01:00At IMPC 2006 in Capetown I had the opportunity to ...At IMPC 2006 in Capetown I had the opportunity to give a plenary speak with the title: "Sensor sorting technology – is the minerals industry missing a chance? ". That time many mineral processing colleagues did not even know that such technology exists. I remember that I had said that sensor based sorting should not be considered as last possibility if all other technologies fail but it should be considered in the early stage of a project- not only in the design of the mineral processing plant, but of the whole integrated mining and processing system. Now, nine years later the situation begins to change. SBS turns from a niche application to -hopefully- a key technology. <br /> Btw, "ore sorting" in my opinion this is not the correct term, as we also sort industrial minerals, gemstones, salt, coal, etc. <br />Hermann Wotruba, RWTH Aachen, GermanyAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-6908362959739425575.post-32952997084728370922015-06-24T15:56:02.813+01:002015-06-24T15:56:02.813+01:00Joseph - I'll look for your paper in upcoming ...Joseph - I'll look for your paper in upcoming Minerals Eng. Tadimety - Avoiding dilution in mining is a form of gross level sorting.<br />Robert Seitz, USAAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-6908362959739425575.post-53948198387675846322015-06-24T08:40:47.072+01:002015-06-24T08:40:47.072+01:00I feel that method of mining (open cast/undergroun...I feel that method of mining (open cast/underground) and ore formation will give a preliminary indication whether ore sorting would be feasible or not. <br />Rao,T.C., IndiaAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-6908362959739425575.post-15156557945850514562015-06-24T08:39:57.441+01:002015-06-24T08:39:57.441+01:00Robert, you're absolutely right - bringing the...Robert, you're absolutely right - bringing the technology to the masses is the important next step.<br /><br />The paper my company recently presented at Physical Separation '15 addressed this very issue. Titled "Bridging the gap: Understanding the economic impact of ore sorting on a mineral processing circuit," this work was a follow up study to the work short-listed by the CEEC. In this study we studied the cost, revenue and CAPEX associated with installing ore sorters at a Cu operation in the southwest USA. We had some very interesting findings that demonstrated the real economic feasibility of the technology. This work has been submitted for publication in Minerals Engineering.<br />Joseph Lessard, USAAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-6908362959739425575.post-35661363826123113912015-06-24T08:38:21.686+01:002015-06-24T08:38:21.686+01:00Thanks for that. I've seen similar results fo...Thanks for that. I've seen similar results for ore types from a few orebodies. <br /> A major difficulty is dealing with the tonnages for porphyry copper deposits - 10s of thousands of tons per day up to 100K+. This is a scaling issue for sorting, material handling, etc. It would be great if Ken or others could comment around economically addressing these challenges. <br />Robert Seitz, USAAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-6908362959739425575.post-16388463798939453152015-06-23T02:39:03.210+01:002015-06-23T02:39:03.210+01:00Robert:
I took a set of drill core data on 1-2 me...Robert:<br /><br />I took a set of drill core data on 1-2 meter sections, a proposed mine plan, and an economic model of a sorting circuit plus it's effects on the rock flow and found that a 0.2% Cu deposit with a 0/15% cutoff, if sorted, could see 50% of the former mill feed rejected as waste. That is an impressive difference. Ken (KC) Armstrong, Allnorth ConsultantsAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-6908362959739425575.post-53784501681374713252015-06-22T16:47:07.275+01:002015-06-22T16:47:07.275+01:00The technology continues as work in progress. It w...The technology continues as work in progress. It will be great to see it scale to large high grade copper orebodies!<br />Robert Seitz, Freeport-McMoRan Copper & Gold Inc, USAAnonymousnoreply@blogger.com