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Airport sand and gravel exploiting

Updated:2012-04-19 16:52:51
For thousands of years, airport sand and gravel  various means different elements. Different components of the dust particles, density, specific gravity, particle size, flat, round shape there is a difference. These characteristics of different mineral debris, under the action of waves, currents, respectively, gathered deposition with the formation of coastal sand deposits.The bulk of the seaside sand and gravel mostly are used in construction sand and gravel. This is because they are generated by the common ordinary rock debris. More scarce and high value coastal placer: rutile, diamonds, monazite, garnet, ilmenite sand, niobium iron ore, tantalum, iron ore, magnetite sand, the ferrochromium sand, tin sand, xenotime sand, gold sand, platinum sand, amber sand, corundum, quartz sand, etc., is really an array, are numerous. The sea like a grinder and sorting machine, around the clock processing to the manufacture of fine sand rich in a variety of metallic and nonmetallic, and by type together to form for human development and utilization of the ore body.Construction of concrete is a huge number of sand.Riverside and underground ancient river is an important source of sand used in construction. Even so, nor the value of the underestimate waterfront building sand. Put this resource as an important practical resources, and its reserves, explorating calculation.
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