Method and device for producing crushed sand by heat treatment of desert sand as starting material
A material and desert technology, applied in the production of artificial crushed sand or crushed sand, to achieve the effect of reducing the risk of natural disasters, reducing the increase, and slowing down the expansion of the desert
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[0041] figure 1 A possible device for carrying out a preferred embodiment of the method according to the invention is shown. In this case, desert sand as a starting material 1 is placed through a storage container 6 (eg, funnel-shaped) on a coarse screen 7 to remove the coarsest impurities from the starting material 1 . After the screening process, the screened starting material 1 is transferred directly to a suitable conveyor belt 8 as support surface. The conveyor belt is provided with a release sheet 9 to produce a uniform layer with a controllable layer thickness. Optionally, the flatness of the material layer can be improved by vibrating belts. The homogeneous sand layer goes further via the conveyor belt 8 to the level of heat treatment, melting the starting material 1 as it is guided past the immediate region of the focal point 10 of the device 5 for concentrating the sun's rays, such as a plano-convex converging lens. The larger the area of the means 5 for concen...
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