Microsoft Word 1 География doc
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- ҚазҰУ Хабаршысы.
- Methods and Techniques
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Introduction Quartz is one of the most common minerals in nature. According to silicate tetrahedron, it belongs to silicate varieties- the most widespread mineral group in the earth's crust. Quartz – the main source of silicon, which is the second most common element in the earth's crust. High-purity quartz is common quartz that is characterized by exceptionally low concentrations of elements other than silicon and oxygen. Untreated, naturally occurring quartz with less than 50 ppm of impurities qualifies as high-purity quartz; however, quartz with as much as ҚазҰУ Хабаршысы. География сериясы. 2010, №2 (31) 31 500 ppm total impurities may suffice if industrially feasible dressing techniques succeed in lowering the impurity level to less than 50 ppm /1/. The demand for the quartz raw material is increasing worldwide, in particular, the demand for high-purity quartz (HPQ; e.g. /2, 3/). The forecasts of the solid growth of the high-purity quartz demand in the world market is about 5–20% per annum, as a result of continued expansion in the production of silicon oxide wafers for semi-conductor technology. Quartz deposits, which are the raw materials for the reception of silicon, are basically concentrated in the Eastern Desert of Egypt. All these quartz deposits, unfortunately, have not been studied in detail for their suitability for solar energy purposes and other hi-tech industries. Therefore, based on the quartz deposits of Marwat Alimikan, a revision of mineralogical and geochemical studies to determine their compatibility for high-purity quartz had been carried out. Methods and Techniques The methods and techniques that have been applied on the quartz deposits of Marwat Alimikan area are field work and laboratory work. The field work was carried out to study the relationship between the quartz deposits and their host rocks, as well as collecting representative samples of quartz for laboratory work. The laboratory work that carried out on the quartz deposits of Marwat Alimikan area are: 1) Thermal and petrophysical measurements (thermal stability, loss on ignition, water absorption and mechanical resistance) and 2) Geochemical composition by using the XRF technique. All the laboratory works were carried out in the labs of the Egyptian geological survey. жүктеу/скачать 16,6 Mb. Достарыңызбен бөлісу:
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