- Tytuł:
- An experimental study of removing impurity from a quartz ore by microbial flotation-acid leaching
- Autorzy:
-
Zhu, Jujian
Dai, Shujuan
Li, Pengcheng
Yang, Shuyong - Powiązania:
- https://bibliotekanauki.pl/articles/1448443.pdf
- Data publikacji:
- 2021
- Wydawca:
- Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
- Tematy:
-
quartz purification
flotation
acid leaching
waste bacteria - Opis:
- The purity of a quartz ore is relatively low at a $SiO_2$ 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 $CaCl_2$, and 800 g/Mg $NaOL$ in the flotation experiments for the quartz ore. Moreover, a $SiO_2$ 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 $H_2SO_4$, $HCl$, $HNO_3$, 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 –$COOH$, –$CH_2$–, and –$CH_3$, which are the functional groups of starch but also $NH_2$ and –$C=O-NH$– in WJ. The $NH_2$ and –$C=O-NH$– in WJ are the important groups for adsorption, so the depressing effect on hematite was better for WJ than starch.
- Źródło:
-
Physicochemical Problems of Mineral Processing; 2021, 57, 1; 18-28
1643-1049
2084-4735 - Pojawia się w:
- Physicochemical Problems of Mineral Processing
- Dostawca treści:
- Biblioteka Nauki
Artykuł