Model Example of Copper-Moly Separation Circuit and Flowsheet
The copper-moly separation circuit was modelled using the test kinetics. The circuit was configured to include columns in every stage in order to minimize the amount of entrainment and to maximize the washing effect of the molybdenum concentrate. The circuit was designed with long retention times so that it could be operated with a slow […]
Flotation Time Scale-up Factors – Laboratory to Plant
Using Laboratory bench-top float test results and their retention (flotation) time to scale-up to real life full scale plant time can be done using the following tables and examples. How to select the proper scale-up factor takes experience and …. good data. Figure 16.7 was used and seen in the a technical report for the Pebble […]
What is the Relationship between Head Grade and Mineral Liberation
Some plant operators claim their metallurgical recovery targets are harder, more difficult, to meet as head grades drops down. Is it true or is it just voodoo? Using Mineralogy can answer this question scientifically. Relationship between Head Grade and Mineral Liberation EXAMPLE The red/white dot points to the actual monthly liberation of 42% VS history. […]
Effect of Regrind on Grade and Recovery
How do you know if or when regrinding and applying further liberation power can improve your metal’s recovery? Below here is data showing what is to be gained by correctly applying regrind to a copper stream. On the graph, the red/white dot points to where the plan currently is light green Grade-Recovery curve VS where is could be on […]
High Tech Flotation Reagent Addition System
Evaluate Oxide Copper Recovery by Flotation
If the idea is try to recover, by flotation, copper oxides that are located in the upper part of the deposit. According to geology department the main copper oxide minerals are chrysocolla and atacamite. There are small quantities of azurite and malachite. As far as I know, it is difficult to float chrysocolla. Malachite and […]
Flotation of Marmatite
The chemical formula for sphalerite and marmatite is (Zn,Fe)S not (ZnFeS2). The iron and solid solution are in a solid solution and marmatite (there is technically no mineral called marmatite) is referred to as the high iron variety of sphalerite https://en.wiktionary.org/wiki/marmatite They have the same flotation properties and the high iron content makes the sphalerite […]
Flotation Column Design
Here is a classic Flotation Column Design with air spargers, froth launders and wash water header/tub. Column Flotation Cells make great “grade machines” but are know as weak on recovery. Low energy, low recoveries at each end of the size particle spectrum.
Flotation Reagent Metering Pumps
I recently did a reagent plant trial and worked with a pretty nice flotation reagent metering pumps. The pump is supplied by https://www.pmps.co.za This portable reagent supply unit is a mechanical diaphragm metering pump. As see on https://www.pmps.co.za/obl-mechanical-diaphragm-dosing-pump They even had “Water Driven Pumps” Other pumps I never worked with include https://www.awe-ltd.co.uk/products/dosing_pumps_electronic.html and https://www.lutzjescoamerica.com/index.php?id=1645 Also https://www.911metallurgist.com/mibc-frother-pump
Sodium Metabisulfite MBS for pH Control and Pyrite Depression in Flotation
Sodium Metabisulfite aka MBS is used for pH control in froth flotation to control Pyrite depression. Below is a graph showing pH VS pyrite recovery at various collector addition rates. It is also used to prevent flotation of sphalerite by copper activation in the presence of Tennantite/Covellite in the ore. For pyrite flotation, you see maximum iron/pyrite […]