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Sand is used to provide bulk, strength, and other properties to construction materials like asphalt and concrete. It is also used as a decorative material in landscaping. The stones were rubbed on a piece of wetted sandstone to hone the cutting edge. In some cases, loose sand was scattered on a flat rock, and objects were rubbed against the sandy surface to smooth them.
The most common sand is composed of particles of quartz and feldspar. Quartz sand particles are colorless or slightly pink, while feldspar sand has a pink or amber color. Black sands, such as those found in Hawaii, are composed of particles of obsidian formed by volcanic activity. Other black sands include materials such as magnetite and humbled.
The definition of the size of sand particles varies, but in general sand contains particles measuring about 0.0025-0.08 in (0.063-2.0 mm) in diameter. Larger particles are either granules or gravel, depending on their size. In the construction business, all aggregate materials with particles smaller than 0.25 in (6.4 mm) are classified as fine aggregates. This includes sand. Materials with particles from 0.25 in (6.4 mm) up to about 6.0 in (15.2 cm) are classified as coarse aggregates.
Sand has a density of 2,600-3,100 lb per cubic yard (1,538-1,842 kg per cubic meter). The trapped water content between the sand particles can cause the density to vary substantial.
Chinaware ball mill is mainly used for mixing and milling materials, with even output fineness and energy-saving. Not only the wet mill, but also wet mill. The machine could use the different line according to the product requirement to satisfy different requirement. The milling fineness depends on the milling time, the motor start by the coupling reduce voltage, lower the starting electricity, the structure is pided into integral type and freestanding type, advantages of product is lower investment, energy saving, structure novelty, simply operated, used safely, ability even etc. It is suitable for mixing and grinding common and particular materials. User could choose the proper type and line, media material depend on material ratio, rigidity, and output size etc.
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