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"What equipment to make sand?" "Whether vertical shaft Impact crusher can make sand"? This questions often inquiry by investors which want invest sand production line. Vertical shaft Impact crusher is also known as Sand making machine, it is certainly possible to use for making sand, and the most important issue is the program when making sand.
The questions of sand making process, currently there are two main arguments, one advocating the use of a single vertical shaft impact crusher to make sand, another advocate the use of vertical shaft impact crusher and rod mill joint make sand. In fact, from our years of experience point of view, if you need high quality sand, then the second option is most appropriate.
As a result of the limitation of equipment working principle, the vertical shaft impact fragmentized mechanism sand product grading of discontinuous, for "more than two head, among little" gap grading, powder, flake material is more, for normal concrete, the stone powder content will be overweight. According to the research of the artificial sand and concrete performance relationship shows that artificial sand fineness modulus, grading and stone powder content on concrete dosage of cement, concrete work ability, strength, crack resistance, durability, all have close relationship. Sand fineness modulus FM values and the greater the fraction content is greater than 2.5 mm is too big, in the same case, the mixing material of plastic to reduce, poor work ability, secrete water increases. And 0.63 ~ 2.5 mm fraction content is too little, strength of concrete significantly reduced, especially for concrete with antifreeze requirements, severely reduces bleed air ability, make the concrete durability deterioration to achieve the same effect, it is necessary to increase the dosage of cement, and then bring the subsequent temperature control problem. So modern aggregate demand, pay more and more attention to sand the quality of the finished product, apparently only with a vertical shaft impact crusher is not meeting the production requirements.
The second program is the clever use of complementary vertical shaft impact crusher and rod mill between joint sand; you can solve the problem fundamentally. And high yield, good production quality. So the for long term use, the second option is the best choice.
