Centrifugal crusher for artificial sand manufacture

Artificial sand

Natural sand is unevenly distributed in the world. And some areas are experiencing a serious shortage in this material. In Europe, there will not be issued a license to develop artificial sand. The remedy is found until the recycling of construction debris former metallurgical industries, which occupy a huge area. Almost all kinds of products in the processing of slag dump are used in various industries and compete successfully with natural materials. Especially popular are gravel, sand and gravel-sand mixtures for construction. Sand is an essential part of most construction materials of construction mix up concrete and asphalt. And because of the limited natural resources, receive quality artificial sand all over the world has become an important priority for the gravel plants.

Artificial sand manufacture

Structure, particle size, hardness and other qualities of sand may be different. It can be fractionated high-quality sand, the so-called "dust", the class is less than 160 microns (can be used as a filler), as well as fine aggregate for special purposes. Product quality depends on the crushing and screening equipment, method of production and the type of cultivated species. Typical plant and sorting of gravel, which has in the final stage of cone crusher of fine crushing, gravel produces standard products - crushed stone fractions of 5-10, 10-20, 20-40 mm, and others.

As a result of fragmentation of the source material, but rubble, it turns out the so-called "screening" of size 0-5 mm. It has flakiness at least 30-50%, and for that reason may not always be used as filler in building materials. In order to efficiently use available resources to get more gravel quality (and therefore more expensive), as well as receive a screening material suitable for use in the construction industry, production workers are increasingly using technology to impact crushing.

Artificial sand manufacture crushers

Crushers, operating on the principle of centrifugal acceleration of material, as well as other percussion crushers (rotary, hammer) all over the world have become generally accepted standard of crushing rocks in order to obtain high-quality material. Hammer and impact crushers are mainly used for soft materials (for example, is not very hard limestone types) because of the large depreciation of the workers on the job. For a more hard and abrasive material around the world apply a centrifugal impact crusher with a vertical shaft. They produce the best large-and fine-grained aggregates.

The construction industry crusher a cube-shaped crushed stone known production of superior quality (Category 1) with the content of flakiness grains less than 10%. And thanks to the use of a free kick for crushing, high quality product distinguishes it from all classes of size, including small: 0-5 mm. This fraction (perhaps with an additional classification) actively acquire, as high-quality artificial sand.

Centrifugal crusher for artificial sand manufacture

The final product of the centrifugal impact crusher is a placeholder excellent shape and texture. In addition to this important indicator, as a reduction of flakiness of the product, we get hardening of the material compared with the initial product (before crushing). This is due to the fact that the free kick saved the structure of the material, and it breaks through cracks and weak spots. According to tests, brand strength of concrete made with sand, obtained by centrifugal grinder VSI5X, 20% higher than the strength of concrete made with sand pit. This is due to the higher quality manufactured sand - grain roughness height of crushed sand is characterized by the micro relief of about 160-200 mm. That provides the best adhesion with the binder (cement in concrete or asphalt in the asphalt).

Requirements for sand for asphalt and concrete are defined in the standard GOST 8736-93 state. Rationed, mainly, the module size and content of the sand fraction -0.16 mm. Sand after a centrifugal impact crusher is obtained, usually with a larger module sizes. Moreover, despite the slightly higher content of flour fractions, compared with natural sand, it has a much lower water requirement (less than 35%). Also, the shape of the grains in the artificial sand, obtained on the crusher VSI5X, is close to the cuboids. As a result, decreases the so-called "emptiness" of the finished product on the basis of artificial sand, which also leads to a decrease in consumption of cement (10-15%).

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