Artificial aggregate production process and advantages and disadvantages

Wool sand making machine by crushing, screening, grinding, washing the resulting sand and gravel. In the absence of natural sand areas, often using artificial aggregate pouring concrete. Artificial aggregate production process are: wool mining, processing coarse aggregate, fine aggregate processing, screening, after washing reserves and transportation. Advantages of artificial aggregate are: ① wool stope nearest arrangements, reduce storage, loading and transport links, saving investment; ② to adjust production mix than the aggregate of all levels make full use of wool, save mining cost; ③ artificial aggregate particle size distribution is good, save cement, fresh surface roughness to increase bond strength, good mechanical properties. The disadvantage is the need to increase drilling blasting, crushing, sieving, washing, sand and other processes, the process is cumbersome, install more equipment and a greater direct costs of the system. Wool sand by crushing, screening, grinding, washing the produced sand and gravel. Lack of natural sand and gravel in the area, the construction of concrete dam often artificial aggregate. China adopted the artificial aggregate in Maotiaohe, Yingxiuwan, Wujiangdu, Dahua, and other water conservancy projects. Wujiangdu project which aggregates production capacity of 500 tons / hour, the highest monthly production of 100,000 cubic meters. Artificial aggregate production processes are mainly wool mining, aggregate production of coarse and fine aggregate production, sand and gravel reserves and transportation. Advantages of artificial aggregate system are: ① wool stope can choose the nearest simplify the intermediate transport, handling, storage and transportation links, so that aggregate processing to form a highly efficient mechanized production line with the concrete mixing system for industrial production; ② adjustable the ratio of aggregate production levels, so that the production and consumption of gradation balance, wool underutilized; ③ from the floods, the annual balanced production, and thus the production scale, hopper volume is small compared with natural sand systems; ④ artificial Good for aggregate particle size distribution, surface roughness fresh, to enhance and cement grout, thus using less artificial aggregate concrete mixing cement, good mechanical properties. Its disadvantages are: the need to increase drilling blasting, crushing, sand making processes, process more complex, large installations, higher direct costs of the system.

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