Rainbow Rare Earths Phalaborwa project shaping up to be one of the lowest cost producers globally. Watch the video here.
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It's just an opinion, but for me, more than anything, it conveys a lack of confidence in the numbers, the forecast.
It creates a situation that can accommodate poor results in the early stages, backed by promises/reassurance that all will come good in the second-half. - If they can't make the numbers, they then have the time and flexibility to manufacture a situation that covers their ****.- Like plant/machinery breakdowns where spares are unavailable etc. - It's never their fault. -This methodology has become a well-trodden path with Centamin. - It's rolled-out every year. - The great thing is, it doesn't seem to affect their rewards/bonuses doing it this way.. -
It's like buying a new car and warranty applies providing it is serviced annually or on the anniversary of so many miles. The plant will have been the largest single capital expense and the first quarter will therefore suffer days when the plant isn't working and when it isn't working there is obviously an impact on production ounces.
An annual service and or change out of wear items is imperative to safeguard the plant efficiency.
Thanks Dasut, that is a helpful explanation.
Best wishes,
Prof
Dasut pardon me ,but are you commenting on the Ball Mill refurb, as the Paste fill plant is for stabilising lodes excavated underground, and is apparently new,
Yes the ball mill is part of the processing plant but there are many links in the chain (moving parts) involved in the production plant, Not all will need upgrading annually but as I say wear parts will need upgrading at set intervals to prevent failure. Problem is all of the working parts commenced at the same time so suggest many of the wear items will need some attention around the same time.
The plant is one thing then you need to look at other areas of the mine example open Pit mining fleet of trucks, loaders and other equipment will all have arrived on site and started at around the same time and to service 10 trucks, 3 x dozers, 2 Graders, 3 x loaders etc will all need to be programmed especially when getting to the time for rebuild and change out of components. Then the power house engines generators and switchgear will need to be programmed into the schedules. Everything and more all started close to the same time basically at mine start up and or when new equipment packages fleets are replaced.
The introduction of the new Paste Fill Plant is another case in point and will be another link in the chain that in a years time could well need some attention during the first quarter.
Thank you ,I do fully understand the need for constant maintainance.
The ball mill has been re-lined with a material that will take extra wear and is much quicker to replace in the future.
Pity others dont understand .
But many are just traders, in and out, quickly.
Theball mills of which there are at least four were done individually so production was affected to the least.
The paste fill plant is simply different, a mixture of material that has a bonding agent such a cement for example.
This is important ,more efficient,and quickly pumped though a tube.
The underground has the much higher grades ,and is the future for now.
If it can be eventually be recovered from the base of the open pit it will increase dramatically the overall grades of ore processed.
The Function of a Ball Mill
To perform its functions, the ball mill operates on the principle of impact and attrition. This principle entails that the balls are dropped from near the top of the shell in order to bring about size reduction impact.
https://raregoldnuggets.com/?p=6740
Ball mills have been the primary piece of machinery in traditional hard rock grinding circuits for 100+ years. They are proven workhorses, with discharge mesh sizes from ~40M to <200M. Use of a ball mill is the best choice when long term, stationary milling is justified by an operation.
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Beyond the products we provide, our mining knowledge and expertise is what sets us apart in the industry. We’re not just an equipment manufacturer; we’re a mining company. We have teams of people with decades of experience working in the industry. They have hands-on knowledge of mining machines and applications, site operations and equipment maintenance and repair, mining technologies, safety solutions, fleet management— and more.
https://www.cat.com/en_US/by-industry/mining.html
https://mbmmllc.com/products/ball-mills/
Grinding Balls and Other Grinding Media: Key consumables
Cutting consumable costs is important for all mining operations, but not at the expense of quality. Grinding media represents low hanging fruit for most miners. Most often, the grinding media in question are grinding balls. In some mid-cap mines, grinding media makes up ~10% of total mining operational expenses (OPEX) and significant savings can be achieved.
Selecting the best-quality grinding media balls is considered a key step towards reducing mining costs. This post discusses grinding balls and quality control procedures that can be employed in order to select the best grinding balls for particular applications.
https://kemcore.com/blogs/news/grinding-balls-and-other-grinding-media-key-consumables
Grinding Balls and Other Grinding Media: Key consumables
Cutting consumable costs is important for all mining operations, but not at the expense of quality. Grinding media represents low hanging fruit for most miners. Most often, the grinding media in question are grinding balls. In some mid-cap mines, grinding media makes up ~10% of total mining operational expenses (OPEX) and significant savings can be achieved.
Selecting the best-quality grinding media balls is considered a key step towards reducing mining costs. This post discusses grinding balls and quality control procedures that can be employed in order to select the best grinding balls for particular applications.
https://kemcore.com/blogs/news/grinding-balls-and-other-grinding-media-key-consumables
Underground mine backfilling is a form of ground improvement that has to be carried out in the mine sites. The backfilling provides ground support and regional stability, thus facilitating ore removal from nearby regions. The large underground voids created by the ore removal are backfilled with the waste tailings in the form of paste fills, hydraulic fills, and others. The tailings are placed in the form of slurry that undergoes self-weight consolidation. A small dosage of binder is added to paste fill and cemented hydraulic fill to enhance strength. Considering the high cement cost, mines are using fly ash and **** to partially replace cement with blended cements. This paper gives a practical overview of underground mine backfilling in Australia using paste fills and hydraulic fills. The mining methods and different types of backfills are briefly discussed, with major focus on paste fills and hydraulic fills.
https://link.springer.com/article/10.1007/s40891-015-0020-8