By 2025, China will build 54,000 km of railway which will drive 11-16 million tons of aggregate demand.However, natural sand resources are limited. The traditional mechanism sand has uneven grading and too much impurity which can not meet the quality requirements for aggregate in the high-speed railways, highways and other projects.

                                                                                                                       

 

In view of this situation, Kefid VU aggregate optimization system carry out comprehensive upgrade based on the original dry sand making system.It use highly intensive tower-type closed, set efficient sand making, grain optimization, stone powder control, grading adjustment, moisture control, environmental treatment in one, so that the performance of sand is comparable to natural sand.

 

In order to reduce the needles and burr-shaped sand, VU aggregate optimization system adopt VU vertical shaft impact crusher and VU grain optimization machine. VU vertical shaft impact crusher can effectively eliminate the needle sheet material which substantial improve grain shape of finished sand; VU grain optimization machine can effectively remove the burrs and residual edges and corners on the surface of the finished sand and can increase -0.6mm fine material, porosity decreased 1%-2%, flow time decreased by 5%.

 

At present, Kefid VU aggregate system has been applied to many gravel production projects in the world and supplied a large number of high-quality aggregate for railways, highways, hydropower projects.