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Chemical analyses of the quartz samples before and after Floatation
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- ҚазҰУ Хабаршысы.
| Chemical analyses of the quartz samples before and after Floatation,
as well as after wet magnetic separations Before Floatation After Floatation After wet magnetic separation Sample № M 1 M 2 M 1* M 2* M 1* " M 2* " Major oxides (wt%) SiO 2 99.60 99.50 99.72 99.62 99.72 99.62 TiO 2 < 0.01 < 0.01 < 0.01 < 0.01 < 0.01 < 0.01 A1 2 O 3 0.19 0.16 0.05 0.04 0.05 0.04 Fe 2 O 3 0.02 0.014 0.016 0.010 0.016 0.010 MnO < 0.01 < 0.01 < 0.01 < 0.01 < 0.01 < 0.01 MgO < 0.01 < 0.01 < 0.01 < 0.01 < 0.01 < 0.01 CaO < 0.01 < 0.01 < 0.01 < 0.01 < 0.01 < 0.01 Na 2 O < 0.01 < 0.01 < 0.01 < 0.01 < 0.01 < 0.01 K 2 O < 0.01 < 0.01 <0.01 <0.01 < 0.01 < 0.01 P 2 O 5 0.01 0.01 0.01 0.01 < 0.01 < 0.01 L.O.I 0.089 0. 192 0.08 0.1 0.07 0.09 Some Trace elements (ppm) Cr 3 4 2.8 3 < 1 < 1 Co 5 5 5 5 5 5 Ni 4 12 3.5 7 3.2 5.5 Cu < 1 < 1 < 1 < 1 3.2 3.2 Zn 4 7 4 7 6 8 Ga < 1 < 1 < 1 < 1 < 1 < 1 As < 1 < 1 < 1 < 1 < 1 < 1 Zr 5 5 < 1 < 1 < 1 < 1 Pb 7 7 4.2 4.2 4.5 4.5 U 4 < 1 3 < 1 3 < 1 ҚазҰУ Хабаршысы. География сериясы. 2010, №2 (31) 29 From table 2, it is clear that there is no change in the contents of SiO 2 , Al 2 O 3 and Fe 2 O 3 . On the other hand, there is a marked decrease in the contents of P 2 O 5 (from 0.01% after Floatation, to < 0.01% after magnetic separation). Some of the trace elements such as Cr and Ni also displayed a noticeable decrease of contents after magnetic separation while Cu, Zn and Pb displayed a little increase of contents after wet magnetic separation. The rest of trace elements did not display any response to the wet magnetic separation. After beneficiation processes (froth Floatation and wet magnetic separation, the quartz deposits of Wadi Mubarak area are qualified to be used for the production of silicon carbide (SiO 2 (99.50 to 99.75%), Al 2 O 3 (0.04 to 0.05%), Fe 2 O 3 (0.05 to 0.1%) and CaO+ MgO ≈1.1% /9/). Discussion Geochemical studies revealed that Wadi Mubarak quartz deposits can be classified as pure to very pure quartz (SiO 2 99% to ≥ 99.5 %) owning to their silica content which ranges from 99.50 to 99.60% with an average content 99.55% /10/. Also they are characterized by low contents of Al 2 O 3 , Fe 2 O 3 , CaO, MgO, Na 2 O, K 2 O and P 2 O 5 . Therefore, these deposits, without treatments, match well the requirements of the Aluminum (Si minimum 98 wt%, Fe maximum 0.02–0.05 wt% and Ca from 0.015–0.3 wt % /11/) and Ferrosilicon alloy (SiO 2 > 98%, Al 2 O 3 < 0.4%, Fe 2 O 3 , CaO and MgO ≤ 0.2% /9/) industries. The quartz deposits of Wadi Mubarak were beneficiated with froth Floatation followed by wet magnetic separations. The beneficiation by froth Floatation resulted in a marked increase in the SiO 2 content and minimized the A1 2 O 3 and Fe 2 O 3 content to a noticeable percent, hence it is recommended to use this method in processing of quartz deposits with aluminum and iron bearing deposits. While the beneficiation of the quartz deposits of Wadi Mubarak with wet magnetic separations after the froth Floatation, displayed no changes in the contents of SiO 2 , Al 2 O 3 and Fe 2 O 3 , but only decreased the contents of P 2 O 5 . Thus the beneficiation by wet magnetic separation has a little effect on the upgrading of the quartz deposits of Wadi Mubarak. жүктеу/скачать 16,6 Mb. Достарыңызбен бөлісу:
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