Mafic Layered Intrusions -Copper/Nickel Massive Sulfide
Mafic Layered Intrusions and complexes including copper nickel massive sulfide, chrome and platinum group elements or PGE deposits. This course on massive sulphide deposits includes copper and nickel exploration methods, nickel sulphide inclusions exploring for copper and nickel sulphide minerals. In the introductory Exploration Geology Course I mentioned felsic, mafic and ultramafic rocks but before […]
Rate of Gold Recovery by Size of Particle
Here is a review of various gold recovery machines/methods and the gold particle size they are best suited to recover. Compare Jig, shaker tables, dry washer, sluice box, spirals, bowl concentrators, falcon, Knelson and leaching. The size distribution of the raw material will also determine if classification of the ore is necessary for better recovery. […]
Kimberlite Deposits and Geology Formation of Diamonds
The geology of Diamonds consist of crystalline carbon although a significant proportion of diamonds are derived from placid deposits i.e. hosted in sediments, placid’s are secondary deposits and all diamonds were at one time or another hosted by kimberlite igneous rocks. The name Kimberlite comes from the town of Kimberley which grew up around the […]
Mill Critical Speed Calculation
Effect of Mill Speed on the Energy Input In this experiment the overall motion of the assembly of 62 balls of two different sizes was studied. The mill was rotated at 50, 62, 75 and 90% of the critical speed. Six lifter bars of rectangular cross-section were used at equal spacing. The overall motion of […]
Estimate Mill Steel OR Rock Charge Volume
This is a 2nd Method for estimation or measuring the steel charge volume inside a mill. If dealing with a full SAG/AG mill, this will give you the rock load%. If you can count liners, you’ll have your answer. The 1st method uses similar parameters. Find more at https://sagmilling.com/tools_millfilling Effect of Mill Filling on the Energy Input The […]
Estimate Charge Volume of a Grinding Mill (Method 1)
The load estimation method has you physically measure distances in the mill. Follow the charts below and pull them into this calculator. If you can clearly see inside the mill, use the liner method.
Calculate Ball Mill Grinding Capacity
The sizing of ball mills and ball milling circuits from laboratory grinding tests is largely a question of applying empirical equations or factors based on accumulated experience. Different manufacturers use different methods, and it is difficult to check the validity of the sizing estimates when estimates from different sources are widely divergent. It is especially […]
Calculate a Classifier and Screen’s Efficiency
Classifier and screen performance formula: Classification efficiency is generally defined as the weight ratio of classified material in the sized overflow product to the total amount of classifiable material in the classifier feed, expressed as a percentage. For two-product separations, the general form used is: Cytec [/fusion_builder_column][/fusion_builder_row][/fusion_builder_container]
Calculation of Top Grinding Media Size -Ball Sizing
The majority of grinding balls are forged carbon or alloy steels. Generally, they are spherical, but other shapes have been used. The choice of the top (or recharge) ball size can be made using empirical equations developed by Bond (1958) or Azzaroni (1984) or by using special batch-grinding tests interpreted in the content of population […]
3 Product Recovery Calculation & Formula
In this metallurgical (material/MatBal balance) involving 2 concentrates or 3 products, we have this example: It is decided to take a copper tail (zinc feed) sample in order to provide a check on the results calculated in the previous example. The sample (CT) assayed 0.55% Cu (c5) and 20.9% Zn (z5), respectively. The check weights […]