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  • based on the plant monthly data the average copper recovery in the cleaner circuit was generally between 75 to 82 per cent during april 2014 when the average mill throughput was 125 000 tonnes per month with an average feed grade of 48 per cent copper the plant copper recovery was 891 per cent during this peak production...

  • flotation tails in the laboratory without any additional reagents the recovery was seen to improve by an average of 5 while floating the tails with additional reagents resulted in improvements of up to 10 Figure 1 The higher the acid-soluble copper feed grade the higher the observed improvement Figure 2...

  • After flotation stages a concentrate was produced with an average grade of 28 - 30 copper and 07 - 08 molybdenum From the previous experience some factors that have an important role in the flotation of copper ore were selected as the input variables 17 18 3 Artificial Neural Network...

  • US3138550A US71906A US7190660A US3138550A US 3138550 A US3138550 A US 3138550A US 71906 A US71906 A US 71906A US 7190660 A US7190660 A US 7190660A US 3138550 A US3138550 A US 3138550A Authority US United States Prior art keywords ore flotation pulp uranium froth Prior art date 1960-11-28 Legal status The legal status is an assumption and is not a legal conclusion...

  • low grade 017 percent Cu 073 g/t Au Methods used to establish the appropriated flotation circuits for the treatment of the Hellyer and Cadia ores as well as the interpretation of the testwork data are discussed in this paper...

  • Calculate the required cell volume and dimensions of the cells Explain the criteria of your selection The specific gravity of the ore is 4 g/cm3 The required flotation time from batch sale kinetic test is determined as 5 min for cell 1 and 7 min for cell2 Feed 1 30 tph 30 w/w Conc 1 10 tph Feed 2 20 tph 20 w/w Conc 2 5 tph Tail Cell...

  • The rougher-scavenger flotation produces a bulk concentrate which is then reground and upgraded to smelter copper grade in the four-stage cleaner flotation section The final concentrate is thickened and filtered before being stockpiled for final shipment to the smelters...

  • duction of cathode copper Assuming an ore grade of 055 percent and a recovery rate of875 64 percent copper in the concentrate concentrat-ing 1 ton of copper ore requires over 200 billion Btu or approximately 42 million Btu/ton of cath-ode copper10 Grinding accountsfor roughly 6 0 percent of the total energy consumed in proc-...

  • Parallel flotation of hydrocyclone overflow and underflow can improve the existing technological process of high-grade copper ore processing in the Copper Mine Bor Keywords Copper Mine Bor high-grade copper ore hydrocyclone overflow underflow flota-tion kinetics University of Belgrade Technical Faculty Bor VJ 12 19210 Bor Serbia...

  • The Kansanshi mixed copper sulfide-oxide ore contains significant proportions of fine material manifesting in a variety of processing challeng This paper presents the work which was carried out to evaluate the efficacy of desliming in improving the flotation response of the ore Two modes of desliming were investigated namely sieving and elutriation after which the deslimed material was...

  • Most flotation circuits include an initial stage of rougher flotation followed by a scavenger stage of flotation The objective of passing through the rougher and scavenger flotation circuits is to maximise recovery of the desired minerals into relatively low grade concentrates that may typically contain 5-15 weight percent of the ore feed...

  • Converting the matte yields a high-grade blister copper with 985 to 995 percent copper Typically blister copper is then fire-refined in an anode furnace cast into anodes and sent to an electrolytic refinery for further impurity elimination Roasting is performed in copper smelters prior to charging reverberatory furnac In roasting...

  • The decline in average grade appears together with a decrease in the variance of the grade of ore mined There is also a marked tendency for the mean to approach the mode as the skewness of the distribution declines so that the log-normal curve approximates a normal density...

  • After flotation stages a concentrate was produced with an average grade of 28 - 30 copper and 07 - 08 molybdenum From the previous experience some factors that have an important role in...

  • global resource stewardship as an example considering copper alone assuming an average loss of 10 the flotation loss described could amount to at least 15 million tonnes per year with a cash value of 10 Billion to understand where there are opportunities for improvement engineers...

  • The texture of particles within a flotation cell play a pivotal role in both mineral recovery and the grade in the flotation concentrate Theoretical curves can be generated based on particle mineralogy and texture to indicate the maximum grade-recovery possible for a given feed ore...

  • Long residence times are typical of the flotation plants because of the high value of the recovered material A residence time greater than 60 minutes in the main stream of flotation is not uncommon 7 The main purpose of this work was to investigate the possibility of PGM recovery by reducing the secondary cleaner tails grade to below 2g/t A...

  • US6234318B1 US09/305 787 US30578799A US6234318B1 US 6234318 B1 US6234318 B1 US 6234318B1 US 30578799 A US30578799 A US 30578799A US 6234318 B1 US6234318 B1 US 6234318B1 Authority US United States Prior art keywords metal system froth flotation determining tails Prior art date 1999-05-04 Legal status The legal status is an assumption and is not a legal conclusion...

  • grade copper-gold ores from open pit and underground sources in two parallel processing trains The copper flotation circuits upgrade copper content by a factor of 80-160 times from feed to a saleable copper concentrate containing tail i is the mass flow rate of particles in the i size class in...

  • When floating the flotation tails in the laboratory without any additional reagents the recovery was seen to improve by an average of 5 while floating the tails with additional reagents improvements of up to 10 were observed Figure 1 The higher the acid-soluble copper AsCu feed grade the higher the observed improvement Figure 2...

  • The theoretical grade-recovery curve for an ore is a definition of the maximum expected recovery by flotation of a mineral or element at a given grade This is defined by the surface area liberation of the value minerals and is consequently directly related to the grind size utilised in the process The theoretical grade-recovery can be readily used to quickly identify potential recovery...

  • The five basic types of reagent used in froth flotation recovery include collectors frothers depressants activators and modifiers When designing the processing plant the types and quantities of reagents used should be considered together with any depressing requirements to lessen environmental impacts in the tailings streams Ritcey 1989...

  • The average grade of copper ores in the 21st century is below 06 percent copper with the proportion of ore minerals being less than 2 percent of the total volume of the ore rock...

  • Feed 1 30 tph 30 w/w Conc 1 10 tph Feed 2 20 tph 20 w/w Conc 2 5 tph Tail Cell Chat Online Flotation Frothan overview ScienceDirect Topics Copper ore usually contains about 05 to 2 copper that occurs in the form of disseminated and stringers The run of mine ore is reduced from 150 mm to 25 mm size in Jaw and Cone crushers...

  • HR Barkhordari et al Occurrence mechanism of silicate and aluminosilicate minerals in 495 than 75 μm The concentrate of the first stage of flota- x Flocculation phenomena in the froth zone tion reground and the tailings are discarded to the final x Decreasing of the copper grade in the flotation tails...

  • 931 and the grade of copper improved to 182 mass from 04 mass under collector-less opti-mum flotation conditions The enrichment ratio of copper in the concentrate was 45 The copper concentrate obtained from flotation of the low-grade copper ore was treated by atmospheric leaching and high-pressure oxidative leaching process...

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