Effect and mechanism of citric acid on flotation separation of siderite and hematite

• Autorzy: Han Huili , Yin Wanzhong , Yao Jin , Li Dong

Identyfikatory

DOI

10.5277/ppmp18133

• Języki publikacji: EN

Abstrakty

EN

Heterocoagulation can occur between fine siderite and hematite particles, which would result in the low efficiency of their separation during the flotation process. To date, there have been no mature methods to increase their separation efficiency. In this paper, citric acid was used as a regulator to enhance the slurry dispersion efficiency. Micro-flotation, scanning electron microscopy (SEM) analysis, settling tests, particle size measurements, zeta potential measurements and E-DLVO theoretical calculations were conducted in the investigations. A maximum recovery difference (53.98%) between siderite and hematite in their mixtures flotation was obtained. Settling tests confirmed that citric acid contributed to improving the dispersion degree of the slurry. SEM analysis indicated that citric acid could clean the surface of particles and weaken the coagulation between siderite and hematite, which were in line with the results of particle size measurements. The zeta potential measurements and Extended-Derjaguin-Landau-Verwey-Overbeek (E-DLVO) theoretical calculations indicated that the citric acid could adsorb on the siderite and hematite surfaces and decreased the surface charge, resulting in a visible increase of the repulsion energy between siderite and hematite particles. Therefore, citric acid can be applied to remove the easily-ground carbonate minerals first to improve the flotation performance of hematite in the separation process of carbonate-containing iron ores.

Słowa kluczowe

EN

siderite; hematite; citric acid; dispersion; flotation; E-DLVO theory

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2019
• Tom: Vol. 55, iss. 1
• Strony: 311--323
• Opis fizyczny: Bibliogr. 45 poz., rys., tab.

Twórcy

autor

Han Huili

• College of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China
• College of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China

autor

Yin Wanzhong

• Liaoning key laboratory of mineral processing technology, Shenyang 110819, China
• College of Zijin Mining, Fuzhou University, Fuzhou 350180, China
• College of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China

autor

Yao Jin

• Liaoning key laboratory of mineral processing technology, Shenyang 110819, China
• College of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China

autor

Li Dong

• College of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).