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Granite is a common hard rock. Taking granite as an example, this paper introduces seven aspects of the production line planning, process design, equipment configuration, and environmental protection of granite sand making plant with an annual output of 3 million tons. For other hard rocks that are harder to break, such as basalt, diabase, andesite, etc. , also can be used for reference
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Suitable raw materials for processing manufactured sand are mainly granite, limestone and other mountain-type raw materials, mainly pebbles and other river-type raw material. There are a variety of industrial waste slag-based tailings-type raw materials. In line with the principle of comprehensive utilization of resources and local policy, the selection of raw materials for sand production varies from place to place
In this case, granite is used as raw material for processing machine sand. The requirements for selecting a mine are shallow overburden, good quality, large mineral reserves and convenient transportation
New mines have a capital construction period of one year or so, in general. The blasting mining area is not large in the first two years of mining. And the stone materials that can be mined out are limited. After two years, as the mining area becomes larger, the mining scale also becomes larger. Therefore, in the two years before mining, control the annual production of sand 1 million ton, annual production of crushed stone 1 million ton. 2 years later adjusted to the annual production of sand 2 million ton, annual production of crushed stone 1 million ton
Products are mainly located in construction stone and construction sand. The Standard of building stone mainly has 0 ~ 5 mm, 5 ~ 10 mm, 10 ~ 31.5 mm, 31.5 ~ 60 mm. The specifications of architectural sand mainly include class I and Class II sand of 0ー4.5 mm. According to the market demand, the raw stone with particle size less than 800 mm and the stone powder with particle size less than 0.075 mm also can be provided
At present, the sand making process is mainly composed of the dry and wet mode of production. And there is also a “wet first, then semi-dry” semi-dry process. Combined with the local environmental requirements, the project selection of dry production process
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