The producers of the V7 sand manufacturing system appear to have solved most of the problems of making an extremely high-quality sand product from crushed rock. In addition, they have gone a long way towards offering a profitable solution to the large accumulations of waste materials, such as scalpings and quarry dust, that are an inevitable by-product of the concentration on coarse aggregate production. With natural sand supplies becoming ever scarcer and more expensive, the potential for adding value to low-value crushed rock is such that a V7 plant can usually justify its costs relatively easily, even in abrasive situations.
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