Activation mechanism of lead ions in cassiterite flotation with salicylhydroxamic acid as collector

Feng, Qicheng; Zhao, Wenjuan; Wen, Shuming; Cao, Qinbo

doi:10.1016/j.seppur.2017.01.053

Cited by 153 publications

(32 citation statements)

References 32 publications

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“…As shown in Figure 9a, the O 1s spectrum of the original bastnaesite could be fitted reasonably, with two peaks at 531.57 eV and 532.3 eV. The O 1s peak positioned at 531.57 eV was attributed to the oxygen in carbonate group of bastnaesite [41], and the other peak positioned at 532.3 eV was related to the oxygen in hydroxyl species (≡ CeOH 0 ) [22,40,42]. Table 1.…”

Section: Adsorption Mechanism Of Strontium Ions On Bastnaesite Surfacesmentioning

confidence: 71%

“…In addition, metal salts may be used as modifying reagents [21]. Feng et al [22] investigated the activation mechanism of lead ions in cassiterite flotation with salicylhydroxamic acid as the collector; the results revealed that lead ions adsorbed onto the mineral surfaces through the interaction between lead species and oxygen sites of cassiterite surfaces to form Sn-O-Pb + . This phenomenon increased the number of active collector adsorption sites and hence, increased the floatability of cassiterite.…”

Section: Introductionmentioning

confidence: 99%

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Depression Mechanism of Strontium Ions in Bastnaesite Flotation with Salicylhydroxamic Acid as Collector

Cao

Liao

et al. 2018

Minerals

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Abstract:Metal ions are widely present in flotation pulp. Metal ions change solution chemistry and mineral surface properties, consequently affecting mineral flotation. In this work, the effect of strontium ions on bastnaesite flotation with salicylhydroxamic acid (SHA) was investigated by microflotation tests, contact angle measurements, zeta-potential measurements, and X-ray photoelectron spectroscopy (XPS) analysis. Microflotation tests confirmed that the addition of strontium ions decreased bastnaesite floatability, compared with that in the absence of strontium ions. Contact angle measurements suggested that the pretreatment of strontium ions decreased SHA adsorption. Zeta potential measurements confirmed that the bastnaesite was depressed by the adsorption of positively charged strontium species, and the lower adsorption capacity of SHA onto the bastnaesite surfaces was obtained after modifying with strontium ions. XPS analysis demonstrated that strontium ions adsorbed onto the bastnaesite surfaces through the interaction between strontium ions and oxygen atoms of surface ≡ CeOH 0 groups. This occurrence hindered surface Ce sites which chelated with SHA and therefore, decreased bastnaesite floatability.

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Section: Adsorption Mechanism Of Strontium Ions On Bastnaesite Surfacesmentioning

confidence: 71%

Section: Introductionmentioning

confidence: 99%

Depression Mechanism of Strontium Ions in Bastnaesite Flotation with Salicylhydroxamic Acid as Collector

Cao

Liao

et al. 2018

Minerals

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“…In the mineral processing field, zeta potential measurements are being widely used to speculate the possible adsorption mechanism of reagents on mineral surfaces by unscrambling the surface potentials before and after the adsorption, and the solution chemistry analysis can be used to find the main functional reagent species [36]. The zeta potentials of cassiterite in aqueous surroundings with the absence and presence of SPA, the relative contents of the species of SPA and recovery of cassiterite as a function of pH values are shown in Figure 5.…”

Section: Zeta Potential Measurements and Solution Chemistry Analysismentioning

confidence: 99%

In Situ Investigation of the Adsorption of Styrene Phosphonic Acid on Cassiterite (110) Surface by Molecular Modeling

Gong¹,

Han²,

Liu³

et al. 2017

Minerals

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Abstract:The flotation, adsorption and bonding mechanisms of styrene phosphonic acid (SPA) to cassiterite were studied using microflotation tests, zeta potential measurements, solution chemistry analysis and density functional theory (DFT) calculations in this paper. Flotation results demonstrated SPA was an excellent collector for cassiterite which could recover over 85% cassiterite particles with the pH range 4.3-6.06 and 40 mg/L SPA. Zeta potential measurements and solution chemistry analysis revealed the adsorption of SPA was mainly contributed by the chemisorption of the monoanions on cassiterite surfaces. Frontier molecular orbital theory analysis and adsorption energy calculation results proved the monoanion of SPA was able to replace the OH − on cassiterite surfaces. The adsorption structure optimization results confirmed the binuclear complex was the most favorable adsorption configuration of SPA on cassiterite (110) surface. Mulliken population calculations and density of states analysis indicated during the bonding process the Sn3 atom lost electrons to O3 atom, and the bonding interaction between O3 and Sn3 atoms was mainly from the contribution of the 2p orbital of O3 atom and the 5s and 5p orbitals of Sn3 atom.

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“…Tin is produced in almost equal amounts from ores (mostly conventionally mined but also via some artisanal mining) and secondary sources (recycled materials), both yielding some 300,000 tons per year [1]. The most important tin mineral is cassiterite (SnO 2 ), which is commonly concentrated by gravity separation methods owing to the differences between the density of the materials in the gangue (usually silicates) [2], and flotation techniques [3][4][5]. China and Indonesia together produce about 70% of the world's tin, and it is in these countries where most of the world's tin smelters are located.…”

Section: Introductionmentioning

confidence: 99%

Recovery and Purification of Tin from Tailings from the Penouta Sn–Ta–Nb Deposit

et al. 2018

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A concentrate obtained from mining tailings containing mainly cassiterite and columbotantalite was reduced for the production of tin metal. The compounds CaCO 3 , Na 2 CO 3 , K 2 CO 3 , and borax were used as fluxes in the pyrometallurgical reduction smelting process, and graphite was employed as the reducing agent. The greatest recovery of Sn (>95%) was obtained when using CaCO 3 as the flux; the purity of Sn was 96%. A slag equivalent to 25% of the mass of the initial concentrate was produced during the recovery of the Sn. This contained 45% Nb 2 O 5 and Ta 2 O 5 , adding extra value to the mine tailings. The tin metal ingot was purified by electrorefining involving a tin and H 2 SO 4 electrolyte solution and a 101.9 A/m 2 current applied for 148 h. Under these conditions, 90 wt % of the Sn in the ingot was recovered at a purity of 99.97%.

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Activation mechanism of lead ions in cassiterite flotation with salicylhydroxamic acid as collector

Cited by 153 publications

References 32 publications

Depression Mechanism of Strontium Ions in Bastnaesite Flotation with Salicylhydroxamic Acid as Collector

Depression Mechanism of Strontium Ions in Bastnaesite Flotation with Salicylhydroxamic Acid as Collector

In Situ Investigation of the Adsorption of Styrene Phosphonic Acid on Cassiterite (110) Surface by Molecular Modeling

Recovery and Purification of Tin from Tailings from the Penouta Sn–Ta–Nb Deposit

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