Influences of process water chemistry on reverse flotation selectivity of iron oxides

• Autorzy: Tang Min , Wang Dong , Wu Yan , Liu Dianwen

Identyfikatory

DOI

10.37190/ppmp/151839

• Języki publikacji: EN

Abstrakty

EN

It is critical for water quality in flotation as it dramatically influences the chemical/electrochemical properties of mineral surfaces and their interactions with reagents. Many potential variations could alter the water chemistry: water recirculation, mineral dissolutions, reagent additions, etc. This study aimed to identify the key elements from the recycled water sources affecting the separation efficiency in a typical industrial flotation circuit of iron oxides through a series of bench/micro flotation tests, zeta potential measurement, etc. The built-up and distribution of the dominant cations/anions in the process water from the roughers in the flotation system was also analyzed and recorded by Inductively Coupled Plasma-Optical Emission (ICP-OES) for a period of about three months when the operations were stable. The flotation results pointed out that a concentrate with a sharp increase of 6.0% Fe recovery and 2.5% SiO₂ content was obtained by using the recycled tailing water only in comparison by using fresh water. In contrast, a slight uptrend in the grade of Fe but a substantial loss of near 6.5% Fe recovery occurs by using the treated sewage water alone instead. This could attribute to the ion distributions in these water sources, in which Ca²⁺, Fen⁺, Mg²⁺ or SO₄²ions were determined as the key ions influencing the flotation behaviors of the iron ore. But the competitive effects of Fe³⁺ ions were more significant than the ones of Ca²⁺ or Mg²⁺ ions. And the occurrence of starch could deteriorate the dilution of silicates in concentration induced by Fe³⁺/Fe²⁺ ions. It can be explained by zeta potential measurement or solution chemistry of those ions, indicating that at 8.5-9.0, the coating of the precipitates of Fe(OH)_3(s) induced by iron ions alters a reverse on the zeta potentials of quartz. The presence of SO₄^2-ions, however, has a positive role in reducing the possibility of slime coating on silicates due to acting as a chelating agent of iron ions.

Słowa kluczowe

EN

water chemistry; ion distribution; iron oxides; reverse flotation

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2022
• Tom: Vol. 58, iss. 6
• Strony: art. no. 151839
• Opis fizyczny: Bibliogr. 30 poz., rys., wykr.

Twórcy

autor

Tang Min

• Department of Mineral Processing, Kunming University of Science and Technology, State Key Lab of Complex Nonferrous Metal Resources Clean Utilization, Yunnan, China, 650093

autor

Wang Dong

• Department of Mineral Processing, Kunming University of Science and Technology, State Key Lab of Complex Nonferrous Metal Resources Clean Utilization, Yunnan, China, 650093

autor

Wu Yan

• Department of Mineral Processing, Kunming University of Science and Technology, State Key Lab of Complex Nonferrous Metal Resources Clean Utilization, Yunnan, China, 650093

autor

Liu Dianwen

• Department of Mineral Processing, Kunming University of Science and Technology, State Key Lab of Complex Nonferrous Metal Resources Clean Utilization, Yunnan, China, 650093

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Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).