Metallurgists Need Statistics
Metallurgists Need Statistics like Pharmaceutical Researchers need Chemistry. See, pharmaceutical manufacturers conduct clinical trials in which new medicines are tested on volunteers to evaluate efficacy and safety. These trials are conducted according to strict statistical protocols that are internationally mandated by government regulation. Why? Because experience has shown that statistically designed trials give the best […]
Geometallurgy Definition and Sample Selection
Rock Type Identification and Lithology Selection 101 ? This represents well a metallurgist/mill operator’s impression of what ore blending and grade control appears to be done somethings.
Beautiful Volcano
What Does Selecting A Representative Sample Mean
Sub-Sampling of Pulverized High Grade Gold Concentrates
The impressions in the second and third rows record a potentially biased sampling method. The Vee shaped cuts took most of their volume from the top, and almost nothing from the bottom of the pancake. This explains why periodic critical review of sampling at smelters is a good idea.
Gravity Borax Method GBM Mercury Free Gold Recovery
The Gravity-Borax Method GBM is still unknown to most Artisanal and small-scale gold miners (ASGMs) worldwide as most still use mercury to extract gold. “Whole-ore amalgamation” is a technique that requires the use of 10–25 g of mercury to produce 1 g of gold. Within the last eight years, it has become evident that this technique is more […]
Abandoned Mines
This information system forms a World Map of Abandoned Mines all around the USA. Zoom in/out and click on a “metal dot” of your choice to view the details of the related Abandoned Mine Listed by the USGS. 64,883 Inactive U.S. Metal Mines as of 2012 This map represents inactive metal mining operations across the United States. This map […]
Typical Reason to Replace a Ball Mill Trunnion ‘unexpectedly’
What is the typical reason a ball mill trunnion needs to be replaced unexpectedly? It is unclear if the trunnion damage was known ahead of time and planned for a change-out during the shell reline or if it was discovered during the reline work. While, not knowing if this is the feed or discharge end trunnion, there […]
Selecting or Choosing a Lab Flotation Machine Model
The model’s choice of a laboratory flotation machine depends on three things; What work you want to do with the machine Who you have to operate the machine How much you have to spend If its just for some ‘hot’ plant floats and some basic metallurgical testing onsite then my personal favorite is the old […]
The effect of particle size on the rate of flotation
