The rougher flotation behavior of a sulfidized copper ore was studied by a series of batch flotation experiments. Response surface modeling based on central composite design was applied to optimize and evaluate the effects of collector, depressant and frother dosages, solution pH and agitation rate on the copper recovery.
A sequential flotation process for the recovery of high-grade concentrates of copper, lead and cobalt-nickel from sulfide ores is provided. A primary grind ore pulp is conditioned with SO 2 as H 2 SO 3 under intense aeration, and the conditioned pulp subjected to sequential flotation, with regrinding and conditioning of a copper rougher concentrate obtained in the first flotation step for copper.
A series of flotation tests was run to determine the best grind and reagent combination for treatment of the ore. Although good recoveries of copper were ob-tained by rougher flotation of ore ground to minus-48- or 65-mesh, difficulty was experienced in cleaning the rougher concentrate. Partial oxidation of …
Jun 05, 2013· To investigate this effect on copper recovery, flotation tests were conducted on the particle sizes of 75, 85 and 93 % −200 mesh (75 μm). Other parameters were constant according to Table 5 except pH, collector and frother dosages which adjusted to their optimum values as obtained and discussed in previous sections.
Keywords: Copper tailing, Pyrite recovery, Flotation, Split factor Accumulated recoveries as a time function of the rougher, scavenger, cleaner, and recleaner flotation stages.
Trans. Indian Inst. Met. Vol. 47, Nos.2-3, April-June 1994, pp. 89-101. QUALITY IMPROVEMENT OF COPPER CONCENTRATES BY COLUMN FLOTATION S. Prabhakar, G. Bhaskar Raju ...
Overall the West Seel composite has very similar metallurgical characteristics as the Ox and East Seel deposits, however, the flotation kinetics of the West Seel sample were comparatively faster, achieving >91% Cu and Mo recoveries after only 6 minutes of flotation in a laboratory cell. Results for 2 rougher flotation tests are summarized below.
Nov 01, 2014· Introduction of a mainstream rougher flotation dose of a CMC depressant to control gangue flotation. These changes were implemented between September 1998 and September 2000, and yielded recovery gains of 2.1% Ni, 1.5% Cu, 1.9% Pd, and 4.1% Pt, as well as a concentrate grade gain from 16% to 18% Ni.
The copper flotation circuits upgrade copper content by a ... streams and the Train 1 rougher concentrate A. ... flotation tests conducted on various concentrate streams around the plant. Figure 3 Copper recovery as a function of mass recovery - dilution cleaning tests
In ion flotation, however, higher Sb values mean unfavorable hydrodynamic conditions to achieve good recoveries in a flotation cell with spargers. For that reason, Jg values above 0.8cm/s cause a drop in the apparent flotation rate constant. The recovery of copper-xanthate complexes by ion flotation is a process that follows first order kinetics.
specific use of lime, in rougher flotation was conducted. Specifically, the goal was to determine an effective alternative to pH adjustment using lime. Experiments were conducted using the most common selection of reagents: xanthate and lime to recover copper and reject iron to establish a base test to compare other reagent schemes with.
copper and 20,0per cent lead had been planned, but, during this initial period, the rougher concentrate averaged 12,7percent copper and31,4percentlead.A profile ofcopper and lead contents down the rougher bank showed noselectivity between copper reporting in thefirstrougher cellsandlead inthe rougher scavenger cellsaswouldnormally beexpected.
Jun 01, 2005· In this work, rougher flotation of low grade copper minerals (0.6–0.7% Cu) was tested in column cells at laboratory scale. A negative bias regime was used in order to create a levitating effect on particle–bubble aggregates to promote gross particle flotation.
the laboratory testing and the plant flotation, particularly for the sphalerite recovery in the rougher copper concentrate. Tests indicate that sphalerite recovery of the flotation concentrate in the laboratory testing was significantly higher than in the plant. The ToF-SIMS surface analysis identifies surface species responsible
Flotation experiments were conducted in a Denver type agitated flotation cell at the rougher stage. The experimental results showed that increasing the pH (from 8 to 10) at low agitation rate (1000 rpm) enhanced the recovery from 80.36% to 85.22%, while at high agitation rate (1200 rpm), a slight declination occurred in the recovery.
Rougher flotation tests with copper sulfide ore from an European mine showed reduced recovery of arsenopyrite in the rougher concentrate compared to the standard reagent suite. Check availability and packaging. Key takeaways: The addition of Pionera F-200 reduces arsenic recovery to 5% compared to over 20% without depressant.
rougher flotation recovery of molybdenite varies between 40% and 90% at a concentrate grade of 5% to 10% Mo. With ozone conditioning for copper depression, however, improved separations appear to be possible, as demonstrated by tests with Cu/Mo concentrates from both the Phelps Dodge Morenci Operations and the Kennecott Copperton Operations ...
ball-mill work index determination, grind studies and rougher flotation recovery tests. The highlights of the study are the following: • Rougher concentrate recovery of 95% and 92% of copper from Composite and No.2, respectively. • The first two minutes of rougher flotation recovered over 85% of copper at a concentrate grade of 29% to ...
It has been known that the power ultrasound is used as a pretreatment and rarely applied as a simultaneous method to improve grade and recovery during froth flotation processes. This work aimed at investigating the impact of simultaneously used ultrasonic waves under variant operating configurations on the flotation of representative porphyry copper ore during rougher and re-cleaner stages.
These metallurgical tests included flotation and acid leaching on High-Grade (HG) and Low-Grade (LG) samples from the Andrade Copper Project. Outstanding results include: • Copper recoveries of 93.4% and 84.4% in the rougher flotation circuit on the HG and LG samples, respectively.
Aug 09, 2021· The metallurgical test work supports both bulk flotation flow-path and sequential flotation flow-path, with the bulk flotation flow-path producing a single gold, silver, lead and zinc rougher ...
Oct 02, 2016· As an example of the beneficial effect of copper sulfate in the activation of zinc sphalerite toward flotation, the series of results shown in Fig. 1 is of interest.These represent rougher tests on a sample of heavy pyritic ore. The particular sample in question contained about 5.6% zinc as marmatite; and was treated in a circuit made alkaline with lime, using pine oil as a frother and ...
Mar 01, 2009· Flotation response for copper oxide composite using AM28 as the copper collector. Total AM28 and MIBC doses for both Tests A and B were 1200 g/t and 50 g/t, respectively. Download : Download full-size image; Fig. 5. Copper grade–recovery relationship from the rougher scavenger flotation test for the copper oxide composite.
In the quest of new, less hazardous, and more ambient-friendly froth flotation reagents, the use of biosolids or humic acids as both collector and frother for the concentration of copper sulphide ores was investigated. Rougher flotation tests were
Oct 25, 2018· In 2015, personnel from Buenavista del Cobre and Outotec conducted a process assessment of the rougher flotation stage. The process assessment included detailed mineralogical characterization of an ore sample, a sampling campaign bank-by-bank and flotation pilot (TC5) tests and lab flotation tests with fresh process samples.
Laboratory tests on plant streams Flotation tests with EDTA addition were performed to determine the effect of surface cleaning agents on the recovery of gold from the plant rougher feed. The adopted procedure was the same as the copper rougher stage shown in Figure 1, but with the required amount of EDTA being added at the conditioning stage.
Nov 04, 2015· Evaluating Copper Rougher-Scavenger Flotation Circuit Grade/Recovery Results. A modal examination of the products produced by the copper flotation rougher-scavenger circuit reveal important information regarding the limits to the efficiency of the process, imposed by mineralogy, fragmentation and flotation …
May 16, 2016· A Copper Flotation Flowsheet. Because the copper in this type of ore usually assays only plus or minus 1% copper, the porphyry copper operations must be relatively large in order to be commercial. The flowsheet in this study illustrates a typical 3,000 ton per day operation. In general most operations of this type have two or more parallel ...