The flotation separation of scheelite, which is hindered by its interface similarity with calcium-containing minerals, remains a worldwide challenge. Achieving precise regulation of …
The flotation enrichment of fine-particle wolframite played a crucial role in production of strategic key metal tungsten. In this paper, N-[(3-hydroxyamino)-propoxy]-N-hexyl dithiocarbamate (HAHD ...
Scheelite (CaWO 4) and wolframite ((Fe, Mn)WO 4) are the only tungsten minerals mined commercially and are mainly found in five types of deposits: skarn, vein/stockwork, porphyry, disseminated and stratabound.Gravity concentration and flotation are the beneficiation techniques most commonly applied to scheelite ore, and gravity and/or magnetic separation for …
With the depletion of easily mined and separated wolframite, scheelite has become the primary source of tungsten. Flotation is the primary technique used to enrich scheelite. However, flotation … Expand
In this paper, N-[(3-hydroxyamino)-propoxy]-N-hexyl dithiocarbamate (HAHD) was designed to strengthen the flotation recovery of wolframite. The in situ AFM images clearly exhibited that the pre ...
The main sorting process of wolframite beneficiation is gravity separation. The technological process includes four parts: pre-selection, grading and re-selection, selection and …
The flotation experiments for binary mixed ore showed that the final wolframite concentrate product with a WO 3 grade of 58.82% and recovery of 80.46% was obtained by 2 × 10-4 mol/L DPA collector at pH 7, while using the traditional sodium oleate (NaOL) collector, the concentrate with a WO 3 grade of 33.9% and recovery of 73.82% was obtained ...
During flotation separation, scheelite is captured with fatty acids, and cassiterite is suppressed with water glass. When scheelite contains aluminum, because molybdenum has good floatability, molybdenum ore can …
ions on wolframite flotation in order to improve the recovery of wolframite. The research in this area is becoming important due to the successful application of lead ions in fine wolframite flotation with chelating reagent in Shizhuyuan, China (Sheng, 2002; Luo et al., 2013). However, a clear mechanism has not given by the related literatures.
Scheelite and calcite was firstly separated by new depressant Poly(sodium 4-styrenesulfonate) (PSS) with NaOL system. The recovery of scheelite was 87.18 % and the recovery of calcite was 5.57 % in single flotation experiments, the recovery and grade of WO 3 was 70.53 % and 61.08 % respectively in artificial mixed ore flotation under the optimal …
New technological research on flotation of wolframite and scheelite using GY chelating collector[J]. The comprehensive utilization of mineral resources, 2000(2): 1-4. Google Scholar [82] HAN H S, HU Y H, SUN W, et al. Novel catalysis mechanisms of benzohydroxamic acid adsorption by lead ions and changes in the surface of scheelite particles[J]. ...
The effect of hydroxamates in the flotation of scheelite and wolframite by using sodium oleate was studied through adsorption capacity measurements, Zeta potential experiments and infrared spectrum analysis. The author would like to provide theoretical guidance to the research of new combination collectors in flotation of tungsten.The study ...
A novel activation system for wolframite flotation by using Cu(II) ion and α-hydroxyoctyl phosphinic acid ... (II)-BHA acid and Bi(III) ions-nonyl hydroxamic acid systems were proved to be effective in recovering scheelite, rutile and ... demonstrated that the peaks of P 2p could be divided into four parts (at 132.5,133.3,133.9 and 134.7 eV ...
Tungsten Deposits, Resources, and Supply. Several tungsten minerals have been reported in the literature, but only scheelite (CaWO 4) and wolframite [(Fe,Mn)WO 4] are of economic importance and nowadays exploited for primary tungsten extraction (Pitfield et al., 2011; Audion and Labbé, 2012; Schmidt, 2012a,b; Yang, 2018).Wolframite is a continuous solid …
In the flotation of scheelite and wolframite benzohydroxamic acid (BHA) is widely used as collector. As well-known chelating collector, hydroxamic acids are effective ligands with metal ions.
HIGHLIGHTS • N-[(3-hydroxyamino)-propoxy]-N-hexyl dithiocarbamate promotes wolframite flotation. • In situ AFM showed the self-assemble of HAHD on Pb(II)-activated wolframite surface.
Scheelite flotation is a more effective method for separating and extracting tungsten concentrate. Its efficiency largely depends on the selection and configuration of equipment, …
Wolframite Flotation Activation BHA ABSTRACT The activation mechanism of Pb(II) on the flotation of wolframite was systematically investigated. ... 2013; Yan et al., 2017). Scheelite and wolframite are the two main resources of tungsten metal (Chen et al., 2017a, 2017b; Meng et al., 2015). Generally, wolframite is recovered by gravity se ...
The crystal structure of scheelite belongs to the tetragonal system, with a space group of I4 1 /a and cell parameters of a = b = 0.5243 nm, c = 1.1376 nm, α = β = γ = 90°, and Z = 4 (Gao et al., 2016b). As shown in Fig. 1(a), the complex anion in the crystal is a W–O 4 tetrahedron, formed by the combination of W 6+ and four O 2-and Ca 2+ ions, and the eight O …
1. Introduction. As an important strategic metal, tungsten is widely used in military applications, aerospace, light industry, textiles, electronic technology, and the chemical industry [1,2,3].Wolframite ((Fe,Mn)WO 4) is a very important mineral raw material used for tungsten refining.Flotation is one of the most important means to obtain high-purity wolframite.
Minerals and Resources There are more than 30 kinds of tungsten minerals in nature, but tungsten minerals of industrial significance are mainly scheelite and wolframite, followed by Calcium tungsten molybdenum ore (CaMo)wo, and copper-tungsten (Cuwo). Wolframite can be divided into Ferberite, wolframite and huebnerite according to the content of …
In order to improve the recovery of tungsten ores containing tin minerals, anisic hydroxamic acid (p-methoxy benzohydroxanic acid, PMOB) was synthesized and introduced as novel collector in the flotation of scheelite, wolframite and cassiterite. The flotation performance and adsorption mechanism were investigated by micro/batch flotation, zeta potential …
With the depletion of easily mined and separated wolframite, scheelite has become the primary source of tungsten. Flotation is the primary technique used to enrich scheelite.
flotation of scheelite and wolframite, lead nitrate is widely applied as the activating agent. Chen and Ye studied the activation of wolframite flotation by lead nitrate and found that obvious activation occurred when pH < 9.5. The authors also concluded that …
The activation of scheelite and wolframite by lead nitrate with benzohydroxamic acid (BHA) as collector was investigated by means of micro flotation test, zeta potential measurement, X-ray photoelectron spectroscopy (XPS) analyses and density functional theory (DFT) calculation. The flotation results confirmed that the addition of lead nitrate can markedly enhance the recovery …
This article aims at reviewing all general physical-chemical information on froth flotation of scheelite, including electrokinetic properties, influence of pH and already existing reagents as well ...
A new technology for flotation of wolframite and scheelite using a new type of GY chelating collector and a effective activator ZP of wolfram minerals was developed. Satisfactory results were obtained in the laboratory tests by processing a complex ore containing 0.599% WO 3, the concentrate grades of wolframite and scheelite are 73.26% and 66.25% respectively,and the …
Scheelite associated with calcium-containing minerals such as calcite and fluorite is difficult to separate by flotation because of the Ca ions contained in the mineral lattices, which cause ...
An efficiently optimized reagent regime was investigated to improve scheelite heating flotation. The scheelite grade and recovery in the plant were significantly improved by 5% and 6%, respectively, which remarkably augmented the economic profit by $260,000 per month. The interaction mechanisms of sodium sulfide and sodium oleate with scheelite, calcite and …
In this paper, the progress and prospects of scheelite flotation chemistry and its practice are summarized, encompassing various fields — such as crystal chemistry, solution …
Scheelite has emerged as the primary source of global tungsten resources. The flotation separation of scheelite, which is hindered by its interface similarity with calcium-containing minerals ...