High pressure grinding mill machine price in zimbabwe

My present invention therefore has for its object an artificial foundry sand which is less subject to deterioration from use thereby increasing the length of life of the sand and reducing the menace to the health and high pressure grinding mill for sale in zimbabwe.

The invention comprises a method of mak4ing the sand and of making foundry molds therefrom. It is possible to produce the sand embodying my invention at reasonable cost and by reason of its long life it is found economical to use it in competition with natural sand even in places where a convenient supply of natural sand is available.In places where there is no supply of natural sand, the sand embodying my invention 65 can be used with marked savings since the sand can be used repeatedly and therefore but a relatively small amount is required.

 The artificial foundry sand embodying my invention is free from unconmbined silica which is the chief ingredient in natural sand, and there- 8 fore does not produce the noxious silica dust which when taken into the lungs is particularly harmful.The accompanying drawing is a diagrammatic view showing apparatus by which the invention may be practiced and illustrating the several steps in the method.

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