Data-Driven Approximated Optimal Control of Sulfur Flotation
Sulfur flotation process is a typical industry process with complex dynamics. For a sulfur flotation cell, the structure of the system model could be derived using first-principles and reaction kinetics. However, the model parameters cannot be obtained under certain working conditions. In this paper, by using adaptive dynamic programming (ADP), …
Froth flotation: a quick overview
Froth flotation represents the most versatile separation method in mineral processing. It takes advantage of the different surface minerals properties to selectively separate more hydrophobic minerals from less ones towards interactions with air bubbles. ... The electron donor sulfur atom, contained in the sulfhydryl collector, forms a chemical ...
Flotation Froth
Flotation Froth. The froth flotation process is commonly employed for the selective separation of a mineral species from a liquid–solid suspension of both valuable and …
Froth flotation beneficiation and physiochemical characterization …
Therefore, the froth flotation technique at parameters of collector dosages (0.0472 kg/ton of diesel oil), frother dosages (0.3689 kg/ton of n-octanol) and particle size (125-63 μm) is effective to increase the calorific value above 5000 kcal/kg and increment carbon content of Achibo-Sombo-Dabaso coal that suitable as an energy source in ...
Froth Flotation Process
Flotation is the process of separation of beneficial minerals from a mixture by creating froth on which minerals separate out. This is a method of mineral processing in which different minerals are separated selectively. The ores containing multiple metals, such as lead, copper and zinc, can be selectively extracted by using froth floatation.
Sulfide Flotation
Sulfide minerals are often recovered by froth flotation where the galvanic interaction would occur, causing the electrons to transfer between them and making significant influence on the flotation process [93]. ... PbOH/Pb and oxy-sulphur species (SO 3 /S) compared top articles in the tail. In other words, they were less hydrophilic.
The Desulfurization of Magnetite Ore by Flotation with a Mixture …
The contamination of sulfur emanating from pyrrhotite in magnetite concentrates has been a problem in iron ore processing. This study utilized froth flotation to float pyrrhotite away from magnetite using collectors of xanthate and dixanthogen. It was found that xanthate or dixanthogen alone could not achieve selective separation between …
Fundamentals of froth flotation | ChemTexts
Froth flotation is the most important technology applied around the world to separate fine mineral particles in aqueous suspension. Froth flotation is …
Flotation response of cerussite after hydrothermal treatment with
Sulfur, assaying 99.5% of elemental sulfur, was used as sulfidation reagent in the hydrothermal sulfidation experiments. Sodium hydroxide and hydrochloric acid were used as pH regulators. Ethyl xanthate and terpineol were used as collector and frother, respectively, in the flotation tests. Download : Download high-res image (140KB)
Comprehensive Recovery of Elemental Sulfur and Sulfide
Froth flotation is a predominant beneficiation technique that can selectively separate target minerals from gangue minerals by making use of their difference in natural hydrophobicity . However, two problems needed to be solved when froth flotation was adopted. ... To investigate the effect of middling return on sulfur flotation, a closed ...
Pyrite depression by phosphates in coal flotation
The selective depression of pyrite from the Kentucky No. 9 coal seam was systematically examined using various kinds of inorganic and organic chemicals. Most of the organic chemicals tested showed little selectivity in pyrite depression. It was found that both orthophosphate and pyrophosphate were effective for the selective depression of coal …
Copper recovery from copper slags through flotation
The ores are concentrated through froth flotation in the form of copper-sulfide or copper-iron-sulfide minerals (e.g. chalcopyrite, chalcocite and etc.), which are then melted in a high-temperature reheating furnace (± 1250 ℃). ... the valuable sulfide predominantly comprises copper and sulfur, along with traces of iron, nickel and lead ...
Role of ammonium sulfate in sulfurization flotation of azurite
Froth flotation is an effective and economical method for recovering minerals [3], [4], [5]. ... The peak fitting results show that the S 2p spectra consist of six states of sulfur species: the peak located at 161.01 eV, labeled S1, corresponds to a sulfide S 2 ...
Minerals | Free Full-Text | Simultaneous Recovery of Niobium and Sulfur
Exploring new ways to acquire niobium resources is essential to resolve niobium supply risks, due to the fact that, at present, 99% of niobium is controlled by only two countries. In the present work, a flotation technique was applied to separate niobium from low-grade niobite ore. To maximize the utilization of the original ore resources, pre …
Flotation Froth
Flotation Froth. The simplest froth flotation separation is that of sulfide minerals from waste oxide minerals, such as andesite, granodiorite, and granite. From: Extractive …
FROTH COLLAPSE DE-AERATION METHOD FOR FLOTATION CONCENTRATES …
The froth flotation process for separation of mineral ores depends on the establishment of carefully controlled froth. ... Egorova, M, 1967. Destruction of sulfur froths using sulfonate, Chemical ...
NICKEL AND COBALT ORES: FLOTATION
Figure 5 Flotation selectivity in the separation of pentlandite from pyrrhotite using sulfur dioxide and diethylenetriamine with sodium isobutyl xanthate (pH+9.2, 25 g t 1 Dow froth!250). (Reprinted with permissionfrom the CanadianInstitute of Mining, Metallurgy and Petroleum.) Figure 6 Flotation results obtained with Clarabelle ore from
Sulfide Ore
Froth flotation entails attaching fine Cu-sulfide mineral particles to bubbles and floating them out of a water–ore mixture. The flotation is made selective by using reagents, which make the Cu-sulfide minerals water-repellant (hydrophobic) while leaving the other minerals wetted (hydrophilic). ... Since sulfur is an insulator the outer ...
Flotation Collectors
Thus, sulphur containing minerals can be weakly hydrophobic without any collector attached. For non-sulfide (e.g., oxide) mineral flotation, the range of Flotation Collectors used is again quite variable, depending on the ore type and operating conditions. The hydrocarbon chain length is typically from 12 carbon atoms to 22 carbon atoms.
Froth flotation of fluorite: A review
The froth phase is the main component of froth flotation as it defines both the quality of the end product and the overall ... and reverse flotation to desulfurate and purify sulfur-containing fluorine concentrates using butyl xanthate as the collector. The content of calcite and sulfur decreased to 0.01% in the Shizhuyuan fluorite dressing ...
Flotation of Gold and Gold-Bearing Ores
After roasting the pyrite flotation concentrate to generate sulfur dioxide for the sulfuric acid plant, the remaining calcine was cyanide leached to remove additional liberated gold. ... Depression of pyrite by cyanide during froth flotation appears to take place in solutions containing free cyanide, ferro/ferri cyanide (Sutherland and Wark ...
Minerals | Free Full-Text | Sulphate Removal from Flotation Process
It is reported that thiosalts and dissolved metal ions also influenced the froth stability. Therefore, effects of sulfur-based ions on flotation performance should be decoupled using assessment based on true flotation and entrainment recovery mechanisms [3,9]. Recirculated streams (like cyclone underflow, scavenger tails, …
Minerals | Free Full-Text | The Challenges and Prospects of
Flotation is a common mineral processing method used to upgrade copper sulfide ores; in this method, copper sulfide mineral particles are concentrated in froth, and associated gangue minerals are separated as tailings. However, a significant amount of copper is lost into tailings during the processing; therefore, tailings can be considered …
Flotation behavior of native gold and gold-bearing sulfide minerals …
In conclusion, a gold concentrate containing low sulfur (10.8%) with a gold recovery of greater than 95% is achievable from a two-stage flow sheet (collectorless flotation as the rougher stage and pyrite flotation as the scavenger stage).
Effect of NaCN:ZnSO4 Mixture Molar Ratio and Particle-Size
This work studies the depression of sphalerite and pyrite with a NaCN:ZnSO4 mixture in the selective separation of Pb-Zn by flotation when the blend is enriched with Ag. Given in this paper are an explanation of depression mechanism and the method for optimizing the Pb-Ag recovery. This was done by analyzing the …
Froth flotation beneficiation and physiochemical characterization …
The main objective of this research is to upgrade the heating value of coal from the Achibo-Sombo-Dabaso area by minimizing the ash and sulfur content using froth flotation techniques, applying diesel oil as a collector and n-octanol as frother reagents. The selection of this reagent is based on the viscosity, low cost and high molecular weights.
Flotation | SpringerLink
Besides bulk-oil flotation, froth flotation, skin flotation, and ion flotation, there are some special flotation methods for fine and microfine minerals. It includes …
Principles and practice of sulphide mineral flotation
Froth Flotation; Ethyl Xanthate; Sulphide Surface; These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves. ... Buckley A.N. and Walker G.W. Sulphur enrichment at sulphide mineral surfaces. In: XVI International Mineral Processing …
Enhancing flotation separation of chalcopyrite and magnesium
At the same time, GA has a significant depression effect on the flotation recovery of talc, which could reduce the possibility of talc entering the concentrate with flotation froth, so the adverse ...
Flotation Reagents
Flotation Reagents. mixtures of chemicals, commonly known as reagents, is presented for the purpose of acquainting those interested in froth flotation with some of the more common reagents and their various uses. Flotation as a concentration process has been extensively used for a number of years. However, little is known of it as an exact ...