The flotation and adsorption of mixed collectors on oxide and silicate minerals

Xu, Longhua; Tian, Jia; Wu, Houqin; Lu, Zhongyuan; Sun, Wei; Hu, Yuehua

doi:10.1016/j.cis.2017.11.003

Cited by 89 publications

(12 citation statements)

References 152 publications

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“…The sodium oleate (NaOL), as a typical and commercial collector for ilmenite flotation [6,8], has the characteristics of strong collecting ability but large dosage. The main optimization approach for ilmenite flotation is NaOL modification or combination with other reagents [9][10][11][12][13][14][15]. However, the route of NaOL modification is long and costly.…”

Section: Introductionmentioning

confidence: 99%

Application of Waste Engine Oil for Improving Ilmenite Flotation Combined with Sodium Oleate Collector

Tian

Cao

et al. 2021

Minerals

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Collectors commonly have synergetic effects in ores flotation. In this work, a waste engine oil (WEO) was introduced as a collector to an ilmenite flotation system with sodium oleate (NaOL). The results show that the floatability of ilmenite was significantly improved by using WEO and NaOL as a combined collector. The recovery of ilmenite was enhanced from 71.26% (only NaOL) to 93.89% (WEO/NaOL combined collector) at the pH of 6.72. The optimum molar ratio of NaOL to WEO was about 2.08 to 1. The WEO and NaOL also have synergetic effects for the collection of ilmenite, because to obtain the ilmenite recovery of 53.96%, the dosage of 45 mg/L NaOL is equal to 38.56 mg/L WEO/NaOL combined collector (30 mg/L NaOL + 8.56 mg/L WEO). In other words, 15 mg/L of NaOL can be replaced by 8.56 mg/L of WEO. It is an effective way to reduce the dosage of the collector and reuse WEO. Therefore, it is a highly valuable and environmentally friendly approach for WEO reuse. WEO mainly consists of oxygen functional groups, aromatics, and long-chain hydrocarbons, especially for the RCONH2 and RCOOH, thereby forming a strong interaction on the ilmenite surface. The adsorption mechanism of waste engine oil and sodium oleate on the ilmenite surface is mainly contributed by chemical adsorption. Therefore, WEO exhibits superior synergistic power with NaOL as a combined collector. Herein, this work provided an effective collector for ilmenite flotation and a feasible approach for reducing NaOL dosage and recycling WEO.

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Section: Introductionmentioning

confidence: 99%

Application of Waste Engine Oil for Improving Ilmenite Flotation Combined with Sodium Oleate Collector

Tian

Cao

et al. 2021

Minerals

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“…The extraction of scheelite from corresponding gangue minerals has been a problem due to its unique embedding characteristics and symbiotic relationship [6]. Foam flotation is an efficient method to recover minerals with low grade and fine grain size [7][8][9]. During the flotation process, the chemical properties of the mineral surface (such as wettability and surface electrical properties) are changed by adding flotation reagents [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Use of Sodium Hexametaphosphate and Citric Acid Mixture as Depressant in the Flotation Separation of Scheelite from Calcite

et al. 2019

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The floatability of scheelite and calcite in the presence of single depressant (SHMP or H 3 Cit) and mixed depressant (SHMP/H 3 Cit) was studied by microflotation experiments and artificial mixed mineral experiments. Solution chemical calculation, zeta potential tests, thermodynamic analysis and XPS analysis were used to explain the relevant depressive mechanism. Mixed depressant (SHMP/H 3 Cit) exhibited excellent selective depressive effect on calcite. The optimal molar ratio of SHMP to H 3 Cit was 1:4. The depressant SHMP and H 3 Cit can be chemically bonded with Ca 2+ to form CaHPO 4 and Ca 3 (Cit) 2 at pH 8. The CaHPO 4 was more easily formed than Ca 3 (Cit) 2 on the mineral surface, which indicated that the depressive effect of SHMP was stronger than H 3 Cit. The SHMP and H 3 Cit of the mixed depressant were co-adsorbed on the calcite surface, while the H 3 Cit of the mixed depressant was weakly adsorbed on the scheelite surface. The mixed depressant can significantly improve the separation efficiency of scheelite from calcite. Sodium silicate (water glass) has been widely used as a depressant in flotation of scheelite from calcite [23]. However, sodium silicate also has some disadvantages as a depressant, such as frequent acidification, narrow optimum pH range, and weak selectivity. Single phosphates are also used for calcite depressants, but they are often limited by their weak selectivity, so mixed reagents are often required [24]. Organic macromolecular depressants have also received attention. Zhang et al. studied the role of sodium polyacrylate in flotation separation of scheelite and calcite [25]. However, sodium polyacrylate also has an unfavorable inhibitory effect on scheelite over a wide range of pH conditions, with poor flotation selectivity. Carboxymethyl cellulose has also been studied as a depressant in the flotation separation of scheelite from calcite [26], but it is difficult to dissolve carboxymethyl cellulose at room temperature, which is not conducive to flotation. In view of the shortcomings of the above single depressants, such as poor collecting ability, weak selectivity, and large dosage, it is often necessary to use mixed depressant to achieve flotation separation between scheelite and gangue minerals.Sodium hexametaphosphate (SHMP) is a clean, non-toxic phosphate that is widely used in the food industry and the chemical industry [27,28]. It can be used as a chelating reagent for metal ions, an adhesive, and a swelling reagent [29,30]. It is also widely used in the mineral processing industry, especially in the floatation. SHMP is used as a dispersant and depressant of minerals in flotation [31][32][33][34][35]. In addition, SHMP can be used to depress calcite [24], but it also has a strong depressive effect on scheelite. Citric acid (H 3 Cit) is also a clean, non-toxic organic acid and is a tricarboxylic acid compound. It is mainly used in the food industry, chemical industry, textile industry, cosmetics and pharmaceutical industries [36][37][38]. Citric acid can be used as depress...

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“…In recent years, researchers have carried out modification studies on guar gum [12][13][14][15] to enhance the selectivity of gangue mineral inhibition, or to replace guar gum with new agents [16,17], but the problem of the selective adsorption of reagent molecules has not been solved. Studies have reported that the interfacial assembly of reagents can improve the selectivity of flotation agents and enhance the separation efficiency of useful minerals and gangue minerals [18][19][20]. Bicak et al [8] compared the inhibitory effects of guar gum and carboxy methyl cellulose (CMC) on pyrite in sulfide flotation and found that guar gum had a strong inhibitory effect on pyrite at low dosage.…”

Section: Introductionmentioning

confidence: 99%

The effect of molecular assembly between collectors and inhibitors on the flotation of pyrite and talc

2019

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In the flotation process, the traditional dosing sequence is to add an inhibitor first, followed by a collector. However, in the sorting process of copper sulfide ore, this method of dosing does not effectively separate sulfide minerals and layered magnesium silicate minerals. In this study, the effect of adding a guar gum (as an inhibitor) and potassium amyl xanthate (as a collector, shortened as PAX) sequence to the flotation separation of pyrite and talc was investigated by micro-flotation tests, adsorption amount measurements, contact angle measurement and FT-IR analysis. The results show that the collector only adsorbs on the pyrite surface, while the inhibitor has a strong adsorption capacity on the pyrite and talc surface. Through the change of the order of the flotation reagent addition, PAX preferentially adsorbs on the pyrite surface, thereby preventing guar gum from adsorbing on the pyrite surface and achieving the selective inhibition of talc by guar gum. This study will help in understanding the molecular assembly between collectors and inhibitors to further treat complex copper sulfide nickel ore.

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The flotation and adsorption of mixed collectors on oxide and silicate minerals

Cited by 89 publications

References 152 publications

Application of Waste Engine Oil for Improving Ilmenite Flotation Combined with Sodium Oleate Collector

Application of Waste Engine Oil for Improving Ilmenite Flotation Combined with Sodium Oleate Collector

Use of Sodium Hexametaphosphate and Citric Acid Mixture as Depressant in the Flotation Separation of Scheelite from Calcite

The effect of molecular assembly between collectors and inhibitors on the flotation of pyrite and talc

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