H.‎ Tavallali, S.‎ Lalehparvar, A-R.‎ Nekoei, K.‎ Niknam, "Ion-flotation separation of Cd(II), Co(II) and Pb(II) traces using a new ligand before their flame atomic absorption spectrometric determinations in colored hair and dryer agents of paint", J.‎ Chin.‎ Chem.Web

Gold concentration usually consists of gravity separation and froth flotation. However, flotation faces difficulties due to gold-bearing ores often being refractory and finely disseminated in nature.Web

As opposed to settling, flotation is a solid–liquid separation technique that is applied to particles whose density is lower or has been made lower than the …Web

The Wushan Operation has been studied as a case study, particularly relevant to the copper-molybdenum separation circuit, in which efforts have been made to improve the quality of the molybdenum concentrate through diagnostic analysis. A key finding has been the appearance of coarser silicate minerals in the molybdenum …Web

All experiments of flotation separation were conducted under the conditions of pretreatment time 5 min, temperature 25 °C, (CH 2 COH) 2 10 mL, KOH 2 g, and ultrasonic power 160 W. As shown in Fig. 7a, the flotation percentage of ABS, PC, and PVC plastics gradually increase with the increasing flotation time, and plateaus at …Web

Abstract A sensitive, reliable, and environmentally friendly method for simple separation and preconcentration of Ag(I) traces in aqueous samples is presented prior to their flame atomic absorption...Web

In recent years, many novel surfactants have been used in the direct flotation separation of diaspore and kaolinite [], such as propyl gallate [], hydroxamic acids [], N-(6-(hydroxyamino)-6-oxohexyl) decanamide [], cetyltrimethylammonium chloride [] and so on.However, the oleic acid collector is still one of the most widely used collectors in …Web

Ion-Flotation Separation of Cd (II), Co (II) and Pb (II) Traces Using a New Ligand before Their Flame Atomic Absorption Spectrometric Determinations in Colored …Web

A simple method for separation/preconcentration and determination of Ag (I) in aqueous samples is described. The method is based on formation of an ion‐associate between Ag …Web

Single mineral flotation tests were carried out in a XFG laboratory flotation machine. The impeller speed was fixed at 1800 r/min. The flotation reagents used in this study were supplied by Tianjin Kemiou Chemical Reagent Co., Ltd (Tianjin, China). The pH value was measured by PHS-3C acidometer built by Shanghai Leici Company …Web

The advent of flotation separation, more than a century ago, revolutionized the mining industry since it led to the possibility of a beneficiating complex, difficult-to-process ores, which were not amenable to successful separation by other known techniques such as gravity separation. Today about two billion tons of ore are …Web

Ion-flotation Separation of Cd(II), Co(II) and Pb(II) Traces Using a New Ligand before Their Flame Atomic Absorption Spectrometric Determinations in Colored Hair and Dryer Agents of Paint Hossein Tavallali, Corresponding Author [email protected] …Web

A simple flotation separation and preconcentration for determination of trace amount of iron (III) and cobalt (II) in biological samples by using flame atomic absorption …Web

These minerals are generally separated by flotation and/or magnetic separation (in the case of iron impurities). Calcite ores typically contain metal sulphide, silicate, or other calcium-containing impurity minerals, which can be removed by flotation. A tremendous amount of research has been performed on refining the flotation process for ...Web

The flotation separation of enargite from copper sulfide minerals is difficult owing to the similar floatability and reagent adsorption characteristics of these minerals. In this study, the effect of oxidation treatment using NaClO flow with FeCl3 on the flotation separation of covellite and enargite was systematically investigated. Micro-flotation …Web

As an important strategic non-metallic mineral resource, fluorite has been widely used in various industrial fields, such as metallurgy, optics and semiconductor manufacturing, as well as fluorine-related chemical engineering. Since the major gangue minerals of fluorite ore are silicate and carbonate ones, flotation is the main …Web

Flotation. According to the difference in physicochemical properties of mineral particle surfaces, flotation is the method that selectively enriches the target minerals in the pulp at the gas-liquid interface and separates them from the pulp, thus realizing the mineral separation. It is also known as floating separation.Web

The extraction and preconcentration of a metal complex via surfactant-mediated phase separation was studied. A sensitive, selective and low-cost methodology for the determination of micro amounts of thorium, lanthanum and yttrium ions, using Eriochrome Cyanine R (ECR) with a flotation step prior to spectrophotometric determination was …Web

Flotation separation of chalcopyrite and molybdenite is an enormous challenge faced by mineral processing, since chalcopyrite is usually closely associated with molybdenite in porphyry copper-molybdenum deposits. Similar flotability of chalcopyrite and molybdenite caused by the residual of pre-adsorbed xanthate on the surface of …Web

The first flotation separation for the rejection of magnesite was reported by Doerner and Dwigh (1930s) [].Flotation of Mg carbonates is typically carried out by using fatty acids, since these collectors give insoluble complexes with all divalent cations [].Determination of the appropriate depressing reagents for sinking valuable minerals in …Web

Natural graphite ores are usually upgraded by froth flotation. However, complex processes with multistage grinding and flotation are required to achieve decent liberation and separation of graphite and gangue minerals. This study reports a short and improved flotation process for fine flake graphite ore by employing a thickening stage. …Web

flotation, in mineral processing, method used to separate and concentrate ores by altering their surfaces to a hydrophobic or hydrophilic condition—that is, the surfaces are either repelled or attracted by water. The flotation process was developed on a commercial scale early in the 20th century to remove very fine mineral particles that ...Web

[22] H. Tavallali, S. Lalehparvar, A. Nekoei, K. Niknam, Ion-flotation separation of Cd(II), Co(II) and Pb(II) traces using a new ligand before their flame atomic absorption spectrometric determina-Web

The recycling of spent lithium-ion batteries (LIBs) has attracted great attention, mainly because of its significant impact on resource recycling and environmental protection. Currently, the processes involved in recovering valuable metals from spent LIBs have shown remarkable progress, but little attention has been paid to the effective …Web

(2012) Tavallali et al. Clean - Soil, Air, Water. A sensitive, reliable, and environmentally friendly method for simple separation and preconcentration of Ag(I) traces in aqueous samples is presented prior to their flame atomic absorption spectrometric determinations. At pH 7.0, Ag(I) was separat...Web

Porphyry-type deposits are the major sources of copper and molybdenum, and flotation has been adopted to recover them separately. The conventional reagents used for depressing copper minerals, such as NaHS, Na2S, and Nokes reagent, have the potential to emit toxic H2S gas when pulp pH was not properly controlled. Thus, in this study the …Web

As an important strategic non-metallic mineral resource, fluorite has been widely used in various industrial fields, such as metallurgy, optics and semiconductor manufacturing, as well as fluorine-related …Web

During flotation, the following reagents were used: sodium sulfide (Na 2 S) for sulfidization of minerals, zinc sulfate (ZnSO 4 *7H 2 O) and sodium cyanide (NaCN) for depression of zinc minerals and pyrite. Sodium butyl xanthate (C 4 H 9 OS 2 Na) is used as a collector; oxal T-92 (CH 3 CHOHCH 3) is used as a frother.Before each flotation run, …Web

A sensitive, reliable, and environmentally friendly method for simple separation and preconcentration of Ag(I) traces in aqueous samples is presented prior to their flame …Web

Flotation constitutes a separation process that originated from mineral processing. Nowadays, wider applications have been found and compared to flotation for water and wastewater treatment. Stress in the present review paper was mainly applied to heavy metal ions recovery by flotation and the respective mechanism followed, being …Web

The importance of the flotation process to the economy of the whole industrial world is considered enormous. Without this process, many familiar metals and inorganic raw materials would be exceedingly scarce and costly because the high-grade ores that could be processed by simple physical and mechanical methods have long …Web

A rapid flotation method for cobalt and copper separation and enrichment from fresh waters is established. At pH 6.0, ionic strength of 0.02 mol/l, using sodium dodecylsulfate as a ing reagent ...Web

(2012) Tavallali et al. Clean - Soil, Air, Water. A sensitive, reliable, and environmentally friendly method for simple separation and preconcentration of Ag(I) traces in …Web

The flotation separation process mainly includes: (1) Grind the ore finely by the ball mill or rod mill to dissociate useful minerals from gangue minerals. (2) Separate the ore by the flotation machine. Adjust the ore pulp and add flotation reagents. (3) Do the flotation processing. (4) Filter, concentrate or dry the product .Web

FLOTATION. A.V. Nguyen, in Encyclopedia of Separation Science, 2007 Industrial Applications of Flotation. Flotation has been used by mineral and chemical engineers for the separation and concentration of aqueous suspensions or solutions of a variety of minerals, coal, precipitates, inorganic waste constituents, effluents, and even …Web

A flotation method for simultaneous separation of cobalt and nickel traces from fresh water is proposed. Lead(II) hexamethylenedithiocarbamate, Pb(HMDTC)2, was used as a new collector for the ...Web

Fluorite and scheelite, which are strategic calcium-bearing minerals, have similar active sites (Ca2+); as a result, the efficient separation of the two minerals is still one of the world's most difficult problems in the field of flotation. In this work, N-decanoylsarcosine sodium (SDAA), a non-toxic and low-cost amino acid surfactant, was …Web