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Concrete has been playing one important role on the work of big, medium and small sized building construction in China. The material used to make concrete is gravel aggregate, which contributes to concrete by being the supporter and which also is one indispensible material in the industry of building construction. The durability of concrete is determined by cement and the aggregate. The main machines used to make broken stone are jaw crusher, impact crusher and cone crusher, which is used for medium crushing and fine crushing; and the main machines used to manufacture the silver sand are vertical shaft impact crusher and sand-making machine, which is used for fine crushing. The most suitable equipment used to make aggregate for the building construction is the machine made by Henan Hongxing Mining Machinery. With the increasing demand for concrete in the mainland, we also pursuit for high level and high technology for the equipment which is used to produce aggregate, the reliable quality and stable performance are the working tendency for the crushing equipment. According to the shape of the finished products, the process of the aggregate can be divided into two types, one is broken stone, and the other is silver sand, this two kinds of finished products need different equipment in the process of manufacturing.gravel screen: http://www.china-hxjq.com/n293.html wet process rotary kiln: http://www.hxjq-crusher.com/news-lime_rotary_kiln.html The production lines of broken stone and silver sand are not different from each other in essence, which are used to crush and process the stones, the single one different point from each other is just the operating principle and the fineness of the finished products. In the process of enhancing the demand for the aggregate, we will lift the quality and efficiency of our products to one new level, Henan Hongxing has been looking for new breakthrough in order to improve the using efficiency and to reach our goals.