Research on Potential Control Flotation of Molybdenite

2008 ◽  
Vol 58 ◽  
pp. 147-153
Author(s):  
Wan Zhong Yin ◽  
Li Rong Zhang ◽  
Ya Zhuo Ding
Keyword(s):  
Sodium Silicate ◽  
Sodium Sulfide ◽  
Potential Control ◽  
Flotation Performance ◽  
Pulp Potential ◽  
Main Factor

In this paper, potential control flotation of molybdenite has been investigated which focus on the effect of pulp potential on flotation performance. Optimum flotation conditions of molybdenite are determined through tests: optimum pulp potential is 190mv~300mv, dosage of sodium sulfide is 6kg/t.The potential control flotation does not use sodium silicate which solved the problem of tailing settlement difficulties. The mechanism of potential control flotation shows that S0 is the main factor that achieves potential control flotation of molybdenite.

Study on Recovery of Lead-Zinc Tailing Ore by Electrochemical Flotation

2014 ◽  
Vol 675-677 ◽  
pp. 1451-1454 ◽  
Author(s):  
Gui Ying Zhou ◽  
Wen Juan Li ◽  
Yong Chen ◽  
Yong Sheng Song
Keyword(s):  
Potential Range ◽  
Low Grade ◽  
Separation Potential ◽  
Potential Control ◽  
Iron Sulfur ◽  
Lead And Zinc ◽  
High Oxidation ◽  
Lead Zinc ◽  
Pulp Potential ◽  
Zinc Concentrate

The tailing in a large lead-zinc-iron-sulfur multi-metallic mine has rich reservation in variety of metallic minerals. It has been difficult to recover because of all kinds of reasons. The challenges faced by lead-zinc ore beneficiation are, low grade and recovery of lead and zinc concentrate for fine disseminated grain size, high oxidation rate and close intergrowth. This paper presents a Pulp Potential Control Flotation by stages technique to improve the flotation performance of the lead-zinc ores. In the electrochemical potential controlling flotation processing, using DDTC as collector, the separation potential range of galena and sphalerite with pyrrhotite can be achieved. Flotation circuit of lead-zinc-silver tailing ore was achieved.

Influence of the Addition of Depressants during Grinding on Lead-Zinc Separation

2012 ◽  
Vol 554-556 ◽  
pp. 420-424
Author(s):  
Rong Dong Deng ◽  
Quan Jun Liu ◽  
Ting Hu ◽  
Feng Hong Ye
Keyword(s):  
Dissolved Oxygen ◽  
Separation Efficiency ◽  
Size Analysis ◽  
Lead And Zinc ◽  
Lead Zinc ◽  
Flotation Performance ◽  
Pulp Potential

The flotation performance of a complex lead and zinc ore were investigated by changing the grinding environments. Four groups of testing were conducted with different depressants or their combinations. Flotation results, size-by-size analysis, pulp potential (Eh) and dissolved oxygen (D0) were studied. It was found that the addition of depressants during grinding was beneficial to increasing the separation efficiency.

Pulp Potential Control in Flotation: The Effect of Hydrogen Peroxide Addition on the Extent of Xanthate Oxidation

2002 ◽  
Vol 41 (4) ◽  
pp. 391-397 ◽  
Author(s):  
F. Nava-Alonso ◽  
T. Pecina-Treviño ◽  
R. Pérez-Garibay ◽  
A. Uribe-Salas
Keyword(s):  
Hydrogen Peroxide ◽  
Potential Control ◽  
Pulp Potential

Metallurgical improvement of a lead/copper flotation stage by pulp potential control

2000 ◽  
Vol 59 (1) ◽  
pp. 69-83 ◽  
Author(s):  
A Uribe-Salas ◽  
T.E Martı́nez-Cavazos ◽  
F.C Nava-Alonso ◽  
J Méndez-Nonell ◽  
C Lara-Valenzuela
Keyword(s):  
Potential Control ◽  
Pulp Potential ◽  
Copper Flotation

Flotation of a Copper-Lead Sulfide-Oxide Ore：Using a Combined Depressant for Galena and an Effective Activator D2 for Copper Oxide Minerals

2013 ◽  
Vol 634-638 ◽  
pp. 3368-3374
Author(s):  
Mei Hua Liu ◽  
Yi Qiang Liang ◽  
Sheng Jian ◽  
Xu Dong Zhang
Keyword(s):  
Copper Oxide ◽  
Lead Sulfide ◽  
Copper Sulfide ◽  
Lead Oxide ◽  
Sodium Sulfide ◽  
Sodium Thiosulfate ◽  
Oxidation Rates ◽  
Lead Oxides ◽  
Flotation Performance ◽  
Copper Lead

The properties of a Cu-Pb oxide ore are investigated by XRD and SEM. Results show that the ore is characterized by chalcocite, galena, azurite and cerusite. Copper and lead phases analysis show that the oxidation rates of copper and lead are up to 70% and 72%, respectively. In order to get a good flotation performance for the difficult-to-treat ore, an efficient flotation technology of bulk flotation of Cu-Pb sulfides，separation of Cu-Pb sulfides, copper and lead oxides flotation has been developed. By applying the combined depressants (sodium thiosulfate + peroxide), activator Disulhydroxybenzen Thiodiazole (developed by Kunming Metallurgy Research Institute) in copper oxide flotation and sodium sulfide in flotation of lead oxide, chalcocite and galena can be separated and the Cu-Pb oxides can be activated. Results in closed circuit test show that when the feed assays 0.59% Cu, 2.40% Pb and 39.87 g/t Ag, marketable copper sulfide and oxide concentrates, lead sulfide and oxide concentrates can be obtained. At the same time, silver got enriched in the concentrates too. This study is expected to give a technical support in utilizing this complex Cu-Pb oxide ores.

Dual effects of sodium sulfide on the flotation behavior of chalcopyrite: I. Effect of pulp potential

2014 ◽  
Vol 21 (5) ◽  
pp. 415-422 ◽  
Author(s):  
Bijan Taheri ◽  
Mahmoud Abdollahy ◽  
Sied Ziaedin Shafaei Tonkaboni ◽  
Soheyla Javadian ◽  
Mohammadreza Yarahmadi
Keyword(s):  
Sodium Sulfide ◽  
Pulp Potential ◽  
Flotation Behavior

Experimental Study on Copper Oxide Ore from Fuxin

2011 ◽  
Vol 361-363 ◽  
pp. 259-262
Author(s):  
Ming Yu Li ◽  
Rui Chen Ren ◽  
Tian Yu Guo ◽  
Tie Li
Keyword(s):  
Experimental Study ◽  
Copper Oxide ◽  
Ammonium Sulfate ◽  
Sodium Silicate ◽  
Particle Distribution ◽  
Sodium Sulfide ◽  
Chemical Compositions ◽  
Distribution Characteristics ◽  
Copper Ore ◽  
Mineral Compositions

chemical compositions, mineral compositions, mosaic relationship, particle distribution characteristics are identified by mineralogy research on oxidization copper ore from Fuxin. Flotation conditions and closed-circuit process is carried out, it is adopted that adding sodium sulfide for sulfiding and ammonium sulfate for activating, then adding sodium silicate and sodium hexametaphosphate as combined inhibitation to intensify inhibitating, a combined collector consisiting of hexyl xanthate and butylamine dithiophosphate was used to strengthen the collecting effect. Finally, a copper concentrate with a grade of 17.39 % and a recovery of 59.36 % can be obtained, meanwhile, the grade of associated silver is 297.8 g/t, the recovery is 55.96 %.

Imaging molecules adsorbed onto electrodes under potential control by scanning probe microscopy

1991 ◽  
Vol 49 ◽  
pp. 376-377 ◽  
Author(s):  
N.J. Tao ◽  
J.A. DeRose ◽  
P.I. Oden ◽  
S.M. Lindsay
Keyword(s):  
Surface Charge ◽  
Environmental Effects ◽  
Scanning Probe Microscopy ◽  
Statistical Significance ◽  
Electrochemical Methods ◽  
Surface Structures ◽  
Scanning Probe ◽  
Potential Control ◽  
Afm Imaging ◽  
Special Circumstances

Clemmer and Beebe have pointed out that surface structures on graphite substrates can be misinterpreted as biopolymer images in STM experiments. We have been using electrochemical methods to react DNA fragments onto gold electrodes for STM and AFM imaging. The adsorbates produced in this way are only homogeneous in special circumstances. Searching an inhomogeneous substrate for ‘desired’ images limits the value of the data. Here, we report on a reversible method for imaging adsorbates. The molecules can be lifted onto and off the substrate during imaging. This leaves no doubt about the validity or statistical significance of the images. Furthermore, environmental effects (such as changes in electrolyte or surface charge) can be investigated easily.

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