Microsoft Word 1 География doc
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- Бұл бет үшін навигация:
- Devices used
- Floatation steps: 1. Weight and record the sample. 2. Put the sample in a mixing cup of ratio 1:4 solid to liquid. 3.
- Вестник КазНУ.
- Magnetic separation process Apparatus Wet magnetic separation device of separator type LHWL at separation efficiency from 200 to 2000 Jaws. Procedure
| Froth Floatation process
Two quartz samples were subjected to the Floatation process. The obtained samples by Floatation were subjected to chemical analyses and the obtained analyses are given in table 1. Table 1 Chemical analyses of the quartz samples before and after Floatation Before Floatation After Floatation Sample № M 1 M 2 M 1* M 2* Wt% – – 99.83 99.85 Concentrate Wt gm – – 465.23 485.3 Wt% – – 0.17 0.15 Tails Wt gm – – 0.77 0.7 Major oxides (wt%) SiO 2 99.60 99.50 99.72 99.62 TiO 2 < 0.01 < 0.01 < 0.01 < 0.01 A1 2 O 3 0.19 0.16 0.05 0.04 Fe 2 O 3 0.02 0.014 0.016 0.010 MnO < 0.01 < 0.01 < 0.01 < 0.01 MgO < 0.01 < 0.01 < 0.01 < 0.01 CaO < 0.01 < 0.01 < 0.01 < 0.01 Na 2 O < 0.01 < 0.01 < 0.01 < 0.01 K 2 O < 0.01 < 0.01 <0.01 <0.01 P 2 O 5 0.01 0.01 0.01 0.01 L.O.I 0.089 0. 192 0.08 0.1 Some Trace elements (ppm) Cr 3 4 2.8 3 Co 5 5 5 5 Ni 4 12 3.5 7 Cu < 1 < 1 < 1 < 1 Zn 4 7 4 7 Ga < 1 < 1 < 1 < 1 As < 1 < 1 < 1 < 1 Zr 5 5 < 1 < 1 Pb 7 7 4.2 4.2 U 4 < 1 3 < 1 ¾ Devices used: American Floatation device model Denever of speed 1000 turns/ Minute, pH Meter Device. ¾ Chemicals used: Armac С "collection" 1.5 kg / ton, Pine oil "cause foam" 200 gm / ton, Kerosene 1.5 kg / ton, H 2 SO 4 Acid 1.5 kg/ton, HCL Acid 1.5 kg /ton. ¾ Floatation steps: 1. Weight and record the sample. 2. Put the sample in a mixing cup of ratio 1:4 solid to liquid. 3. Adjust pH at 2–4 using H 2 SO 4 . Вестник КазНУ. Серия географическая. 2010, №2 (31) 28 4. Add Armac С "Collector"+ Kerosene + Pine oil. And operate the device and Floatation process start. As shown in Table 1, it is clear that SiO 2 content is increased (from 99.50–99.60 before Floatation to 99.62–99.72% after Floatation). Also there is a marked decrease of A12O3 (from 0.16–0.19% before Floatation to 0.04–0.05% after Floatation) and Fe 2 O 3 (from 0.014–0.02% before Floatation to 0.01–-0.016% after Floatation) to a noticeable percents. Some of the trace elements such as Cr, Ni, Zr and Pb also displayed a noticeable decrease after froth Floatation while the rest of them did not affected. Magnetic separation process Apparatus Wet magnetic separation device of separator type LHWL at separation efficiency from 200 to 2000 Jaws. Procedure The separation is done under magnetic field at 2000 Jaws. The samples pass through dipoles with the presence of thin stainless steel wire. The magnetic part of the two poles attracts to themselves, the electric current must be off, and the vessel must be substituted and washed to take off the unmagnetic samples. This operation must be done twice for each sample, the first for rough separation and the second for cleaning and assuring quality separating and minimizing ferrous impurities in the nonmagnetic products. The device is capable to separate all iron oxides that are represented by magnetite and ilmenite, in addition to the heavy silicates and others. The single sample in the single time is equal 100 gms. The apparatus separates only the fine grain sizes (-50 microns) using the wet method in a ratio of 1 (solid): 2 (liquid). The analyses results of the floated quartz samples that subjected to magnetic separation process are shown in Table 2. Table 2 жүктеу/скачать 16,6 Mb. Достарыңызбен бөлісу:
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