It is reported that, recently, the National Development and Reform Commission focus approving 55 infrastructure projects, including 25 rail projects, 13 road construction projects, 10 municipal class project and seven ports, waterway projects. The total investment of the 55 infrastructure projects is nearly trillion, which will not only stimulate the short term demand, but also drive the development of relevant industry of infrastructure construction in China.The construction of highways and other projects will greatly boost the market demand of cement, sand and gravel aggregates. It is worth mentioning that China has rich limestone resources limestone, and after crushing, the limestone can become the top gravel aggregate for laying the high – grade highway roadbed, which provides exceptional conditions for the new round of infrastructure construction.Because the main component of limestone is calcium carbonate, the limestone is easy to be crushed. Generally speaking, we use the hammer crusher to crush the limestone, but for some kind of limestone, the content of silicone is special, which will cause more serious wear and tear on the hammerhead, having a higher demand for the quick-wear part of hammer crusher, such as liner plate, hammerhead, grate plate and so on.The large scale single stage hammer crusher produced by Henan Hongxing Mining Machinery Co., Ltd. has a great effect on crushing limestone crushing. It can the limestone crushing ore into the suitable grinding particle size eleven, which can replace the traditional two-stage crushing, professionally used to improve the limestone crushing efficiency and simplify the crushing process, significantly saving the infrastructure investment and production costs. With good quality and excellent performance, Hongxing large scale single stage hammer crusher is widely used at home and abroad.With big crushing ratio, high fineness of discharging size, simple process and low running cost, Hongxing large scale single stage hammer crusher are widely used in the works of mine, smelting, building material, road, railway, irrigation, chemical and other industries.