Blogs
Copper Process Flowsheet Example
A simplified schematic drawing of copper flotation flowsheet. Run-of-mine open pit ore will be crushed in a gyratory crusher. The crushed ore will be processed by means of semi-autogenous and ball mill grinding followed by rougher flotation, regrind, cleaner flotation, and dewatering to produce copper concentrate. The concentrate will be trucked via the existing road network in the area to
Effect of pH on Copper Cleaner Flotation (after Regrind Circuit)
In the study, batch cleaner tests were conducted to confirm the target regrind size and select the cleaner pH conditions. The objective of the high pH, collector-starved environment in the cleaners is: To liberate and reject attached silicates, Depress the previously-floated pyrite. If the floatability imparted on the pyrite in rougher flotation is not adequately depressed during regrinding and cleaning,
Effect of Collector on Copper Flotation Metallurgy
A pretty clean and relatively easy to treat ore was tested suggesting a collector optimization strategy would probably yield only relatively minor incremental metallurgical improvements. Therefore, collector suite fine-tuning was deemed largely better left for future optimization, possibly when the plant is in operation. In earlier studies Sumitomo had adopted the use of thionocarbamate Cytec 3894, a relatively selective and
Effect of pH on Copper Flotation Recovery VS Mass Pull
An example of testing the effect of pH on rougher flotation on pit samples and the results are presented. Since this is only an example, it needs reminding that not all ores will respond the same. Here, rougher flotation is most Selective at a pH of 9.5 as pH levels in the 9 to 10 range yielded 1% to 2%
Effect of Primary Grind Size on Copper Flotation Rougher Grade and Recovery
An example of a copper metallurgy study where the effect of primary grind on rougher flotation each of the GeoMetallurgical samples was investigated. A simple economic study was conducted on these copper flotation results, using typical power costs and a net smelter revenue value for copper of 90 cents. This indicated that the optimum grind was about 140 µm to 150
Sample Preparation Flowchart
The samples set aside for the Super Composites (SC) were blended to form the four composites used for the initial flowsheet development program. Each SC was crushed to 100% passing 10 mesh and rotary split into 2 kg charges and a reject fraction. A flowchart summarizing the sample preparation procedure is presented here below. Eighteen split-core drill holes and two
Gold Recovery with Centrifugal Gravity Concentrator
Here is how a gravity gold concentrator (centrifuge) works as a separator: Make sure the concentrator has been correctly assembled and that all bolts have been tightened. If required, attach a funnel to the material feed inlet. If necessary, connect a hose to the tailings outlet. Place the concentrator on a raised structure such as blocks. Place a receptacle under
Analysis for (Cu, Pb, Zn, Fe, & Cd) by ATOMIC ABSORPTION (AA)
Sample Preparation for assaying Copper/Lead/Zinc/Iron/Cadmium by AA: Weight 0.1 – 0.25 g of sample into a 300 ml tall form beaker Add 5 ml Conc. HCL + 5ml Conc. HNO3. Place samples on a padded hotplate in a fume-hood. Turn the hotplate from 1 switch to 2 switches. Bring to dryness. Avoid sample spitting by moving the sample to the
Copper Lead Zinc Metallurgy
Monthly composites of mill feed, copper concentrate, lead concentrate, zinc concentrate and final tailing were sent for detailed mineralogical/metallurgical analysis. These samples were analyzed and also compared to previous similar work done. The samples represented the following flowsheet and monthly balance: Mineral Speciation: Although Chalcopyrite is still the main form of copper in all samples; the content of secondary copper
Arsenic in Copper Concentrate
In a certain case study of “high” Arsenic in Copper Concentrate (almost 0.5% As) produced by flotation, and where the Cu Conc is mostly chalcopyrite and therefore the main form of copper; the content of secondary copper minerals was variable. Tennantite/Enargite/Freibergite, a copper-arsenic sulphide mineral, as well as covellite, was present in significantly higher amounts today. The presence of secondary copper
Flotation Reagent Mix Concentration Strength
Just an example of strength at which flotation reagents can be mixed at in a Concentrator:
XRF Sample Preparation Methods/Procedure
Table of ContentsHow does XRF workIntensitySamplingAnalyzed VolumeEffect of Particle Size on XRF ResultsMineralogical EffectGrinding XRF SamplePressing XRF SampleXRF Pellet BinderXRF Fusion BeadsXRF Sample SpinnerCoated PaperFluids and SolutionsXRF Sample FilmHow to make XRF sample cups What is x-ray fluorescence and why is XRF sample preparation is important for correct XRF analysis. This is a little introduction to some of our instruments; from
X-RAY Fluorescence Spectroscopy
Here I will be focusing on a chemical surface technique called X-ray Fluorescence Spectroscopy, this method is of importance because it is widely used for chemical analysis particularly in investigation of different materials and research in forensic science this will be vital in solving criminal cases. This technique will be described on the chemical and physical levels. Let’s look at
Mineral Processing Glossary
Table of ContentsABCDEFGHIKLMNOPQRSTUVX A ABC Assay Based Controls are changes made to regulatory set-points that are biased on the level or changes in the level of the valuable metal being recovered. Activators Cause a particular mineral to float with a collector when it otherwise would not. Adsorption The gathering of a gas, liquid, or dissolved substance on a surface
Locked Cycle Test Procedure – One (1) Product
Here are rough instructions to perform a sequential flotation locked cycle test procedure to assess the overall metallurgy of an ore sample expected to produce only 1 concentrate product. The procedures described in this Method are to be used as a guideline only. The final test conditions and flowsheet are actually determined from in-house experimental investigations. Preparation Prior to Test: Determine the
D12 Agitator Speed RPM for Laboratory Flotation Test VS Tank/Cell Size/Volume
In a lab float test, you adjust to agitator’s RPM based on the volume of the tank you’re working with. Here are suggestions. Rougher Cell: Total cell volume =3.3 liters Slurry volume = 2.5 liters (until this mark slurry filled) –> I use 1000 g test charges Cleaner Cell: Total cell volume =1.75 liters Slurry volume = 1 liter I
D12 Laboratory Flotation Machine Parts
I find the parts for a ‘Denver’ D-12 Laboratory Flotation Machine/Cell to be overpriced. From the tank-cell to the agitator blades, Urethane Diffuser Hood, or Impeller and specifically the Tachometer. The primitive D12 Tachometer on a friend’s my D-12 has broken. Refusing to pay $2000 for part of of machine bought used for $10,000 (even if it sells for $17000
Las Luces Copper Mine Project in Chile
Las Luces Grupo Cenizas – Project Mine OP Construction Copper Chile South America. The initiative is property of Minera Las Cenizas S.A. It involves the construction of new works at the Las Luces mine, such as a new waste rock dump, seawater catchment area, slurry deposit and ancillary works. Is also includes another minors works in order to upgrade the
Altın Sallantılı Masası
Altın sallantılı masası temel olarak altın üretiminin son adımında kullanılan düşük kapasiteli bir makinedir. Sallantılı masa beslenen cevheri o cevherin yoğunluk, şekil, öz kütle ve boyuta göre ayıran ince tabakalı ve makaslama akışlı bir proses ekipmanıdır. Mineraller hafiften ağıra ve inceden kalına olmak üzere net ağırlıklarına göre sınıflandırılır. İnce kırılmış yada doğandan alınış cevherler suyla karıştırılarak çamur haline getirilir ve
Carlin Type Gold Deposit
Prospectors frequently talk about being in elephant country, meaning in good hunting grounds for big deposits. Historically Carlin Type Gold Deposit are big elephants but until recently they were largely known to occur only in the limited hunting ground of Northern Nevada that limitation is now beginning to change. How Carlin gold deposits fit into the overall scheme of things.