Business, Industry
Raw materials for industry - sand white quartz
What miracles are not prepared for man on earth! For example, an amazing sight is white sand. From a distance you will not understand at once: whether it is snowdrifts in the middle of summer, or mountains of granulated sugar, or perhaps table salt or another chemical? And only having approached, having taken on a palm and waking up through fingers, you understand, what is it white sand which photo is resulted in given article. And it consists of quartz - a mineral distributed on Earth. Quartz is part of the mineral composition of oligomictic and polymictic sands, composed of desert barkhans, dunes of sea coasts, shallow waters.
Natural white sand
Deposits of quartz sand occur in river valleys. The white river sand is the cleanest, it usually does not contain pollutants, as well as mountain quartz sand, weathered vein outcrops. It is likely to meet in the deposits of natural quartz sand nuggets of precious metals or their minerals. There is sand white buried beneath the thickness of other sedimentary rocks and mined by the quarry method. It usually contains contaminants in the form of admixtures of clays, sandy loams, loams, polymictic sands, which occur in the thickness of quartz sand in the form of layers and lenses.
Creation of nature and hands of human beings
White sand, consisting of 90-95% of quartz, is not so common and is very much appreciated as a raw material for many industries. The lack of natural sand can be replenished - to obtain artificial quartz sand, using crushing and screening equipment. For the production of sand, monolith blocks of milky white quartz are used, crushing which, and sifting the destroyed rock, produces sand with certain and desired particle sizes (fractions). From natural sand artificial is distinguished by exceptional monominerality, acute angles of grains of sand.
Where is quartz sand used
White sand is used for the production of glass. To him are such requirements: 95% it consists of quartz, it should be medium-grained (diameter of sand particles 0.25-0.5 mm), without admixture of substances that are hardly soluble in the glass mass, without harmful impurities of minerals containing iron, chromium, titanium (They color the glass and increase its light absorption). A good glass sand is one that is 98.5% quartz and includes iron oxide not more than 0.1%.
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