gold processing plant elution and electrowinning tank system export to africa

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gold processing plant elution and electrowinning tank system export to africa

Strategies for the optimisation of gold processing plants

Much carbon that was being reactivated during the early to mid eighties showed little difference in activity before and after reactivation. This was a typical result from the early vertical tube kilns where moist carbon was fed down the kiln tubes without further water injection into the hot part of the kiln once temperature had been reached. This moisture evaporated quickly with steam passing back up the tube leaving the carbon essentially dry before it reached the hot part of the kiln where the surface pyrolysis takes place that is needed to remove the organics. At this point, without steam, no pyrolysis reaction means no reactivation. Water, which quickly flashes off to steam, must be injected into this hot regime. Fitting a rotameter as well as a flow controller is highly advisable. The problem is less apparent with the horizontal type kilns where the steam must pass down the length of the kiln and discharge from the hot end. There is also less chance of the organics redepositin...

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In this authors experience there are two and two only vitally critical parameters, over which we have control, for virtually any type of mill that need to be as close to perfect as possible. This needs to be done from commissioning and maintained with regular input by reputable specialists in this field. These two requirements are: 1. Transmission alignment and, 2. Lubrication system. All mills subside or settle in on the plinths and mountings after several months of operation often requiring quite substantial alignment adjustment. Failure to address this issue, if indeed there is a developed misalignment, can result in expensive massive failure and/or accelerated wear of major transmission components and bearings. We seem passionate to re invent the wheel on this issue, and it is common in a large number of plants familiar to us in W.A., although many mill and maintenance superintendents will deny it All other factors effecting mill performance and availability are e...

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Mill motors can often be re rated to provide additional deliverable power to the pinion provided adequate motor protection is in place. A specialist engineer, such as BEC Electrical in Perth, should be used to carry out this investigation and may recommend the fitting of additional protection. Authorisation to increase motor loading 10% or more often results which, mill volume permitting, may allow an immediate proportional increase in tonnage. Optimisation Recommendations 1. Set a target of 10% increase in tonnage through the mill! 2. Carry out a comprehensive mill survey and if data is not available sample ore body and comprehensively test ore for Advanced Media Competency. Supply data to OMC or other appropriate expert for optimisation modelling. OMC are ideally suited to supervise such a program, which they have in house, and are also the W.A. agents for JKSimet. 3. Unlike ball or rod mills SAG mill are grind sensitive and require management on an ho...

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