Autor: Qin, F. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Enhancing SO2 removal efficiency by lime modified with sewage sludge in a novel integrated desulfurization process
Autorzy:: Qin, L.
Han, J.
Chen, W.
Liu, Z.
He, M.
Xing, F.
Powiązania:: https://bibliotekanauki.pl/articles/950037.pdf
Data publikacji:: 2017
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: sewage sludge
steel industry
sintering process
osad ściekowy
przemysł hutniczy
proces spiekania
Opis:: In China, the sintering process annually emitted around 1.5 million t SO₂, representing 70% of SO₂ produced from the iron and steel industry. Lime based sorbent was modified with municipal sewage sludge (MSS) and the influence of the modification on the desulfurization efficiency was investigated in a laboratory-scale novel integrated desulfurization (NID) reactor. The properties of modified sorbent were characterized by the Brunauer–Emmett–Teller (BET) analyzer and X-ray fluorescence (XRD) analyzer. BET surface area was increased from 17.48 to 46.68 m²g^–1. when the MSS/lime ratio increased from 0 to 0.08. Ca₄Al₈Si₈O₃₂, Ca_1.5SiO_3.5, Na₂Si₂O₅ and CaSiO₃ found in the modified lime benefited for the increase of the BET surface area and pore volume. The effects of sewage sludge/CaO weight ratio, calcination temperature and hydration time on the desulfurization efficiency were also studied. SO₂ removal efficiency was increased from 88.7% to 97.3% after using the lime modified with sewage sludge.
Źródło:: Environment Protection Engineering; 2017, 43, 4; 17-27
0324-8828
Pojawia się w:: Environment Protection Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: An innovative technology for recovery of zinc, lead and silver from zinc leaching residue
Autorzy:: Zheng, Y.-X.
Lv, J.-F.
Liu, W.
Qin, W.-Q.
Wen, S.-M.
Powiązania:: https://bibliotekanauki.pl/articles/110688.pdf
Data publikacji:: 2016
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: zinc leaching residue
lead sulfate
zinc sulfate
reduction roasting
flotation
Opis:: Zinc leaching residue is a good source of zinc and has a great potential to be utilized. However, it is very difficult to recover lead, zinc and silver from the residue by traditional technologies. In this study, a new technology based on conversions of PbSO4 and ZnSO4 in the residue to their respective sulfides by reduction roasting with coal powder followed by a flotation treatment was developed. The effects of roasting temperature, coal dosage, reaction time and pyrite dosage were investigated at a laboratory scale. The results showed that the conversion extent of PbSO4 and ZnSO4 under the optimal experimental conditions was 71.89 and 69.76%, respectively. A flotation concentrate containing 39.13% Zn, 6.93% Pb and 973.54 g/Mg Ag was obtained from the treated material, and the recovery of Zn, Pb and Ag was 48.38, 68.23 and 77.41%, respectively. The tailing containing ZnFe2O4 or Fe3O4 could be either stockpiled or further disposed.
Źródło:: Physicochemical Problems of Mineral Processing; 2016, 52, 2; 943-954
1643-1049
2084-4735
Pojawia się w:: Physicochemical Problems of Mineral Processing
Dostawca treści:: Biblioteka Nauki

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