An experimental study of removing impurity from a quartz ore by microbial flotation-acid leaching

• Autorzy: Zhu Jujian , Dai Shujuan , Li Pengcheng , Yang Shuyong

Identyfikatory

DOI

10.37190/ppmp/128183

• Języki publikacji: EN

Abstrakty

EN

The purity of a quartz ore is relatively low at a SiO₂ content of 97.18%, and the main impurity in the ore is Fe, Al, and Ca bearing minerals. The main component in an industrial waste bacteria (WJ) is polysaccharides, which may be used as depressors for inhibiting iron minerals in quartz flotation. Moreover, WJ belongs to microbial inhibitors because it is mainly composed of bacteria. As a result of this study, a concentrate grade of 99.88% at recovery over 80% was obtained under the condition of 2000 g/Mg WJ dosage, a grinding fineness of 70% -0.074 mm, pH 11.7, 400 g/Mg CaCl₂, and 800 g/Mg NaOL in the flotation experiments for the quartz ore. Moreover, a SiO₂ grade of 99.97% at a recovery of 68.85% was obtained at an acid dosage of 40 kg/Mg by using mixed acid of H₂SO₄, HCl, HNO₃, and HF in mass ratios of 20%, 30%, 20%, and 30%, respectively, in subsequent acid leaching of the quartz flotation concentrate. Zeta potential analysis before and after the interaction of quartz and hematite with WJ showed that WJ increased the zeta potential of hematite significantly but had little impact on the zeta potential of quartz, indicating stronger adsorption of WJ on hematite than on quartz. FTIR analysis showed that there exist not only –COOH, –CH₂–, and –CH₃, which are the functional groups of starch but also NH₂ and –C=O-NH– in WJ. The NH₂ and –C=O-NH– in WJ are the important groups for adsorption, so the depressing effect on hematite was better for WJ than starch.

Słowa kluczowe

EN

quartz purification; flotation; acid leaching; waste bacteria

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2021
• Tom: Vol. 57, iss. 1
• Strony: 18--28
• Opis fizyczny: Bibliogr. 26 poz.

Twórcy

autor

Zhu Jujian

• School of Mining Engineering, University of Science and Technology Liaoning, Anshan , China

autor

Dai Shujuan

• School of Mining Engineering, University of Science and Technology Liaoning, Anshan , China

autor

Li Pengcheng

• School of Mining Engineering, University of Science and Technology Liaoning, Anshan , China

autor

Yang Shuyong

• School of Mining Engineering, University of Science and Technology Liaoning, Anshan , China

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).