Machine for Preparing Materials for the Manufacture of Artificial Stone.

摘要

18,163. Schwarz, W. Sept. 11. Moving-stirrer apparatus.-Relates to apparatus for preparing and mixing the raw materials, more particularly lime and sand, employed in the manufacture of artificial stone. The sand is introduced through the dome c, provided with a cover b, into the casing a, which is partially surrounded by a steam jacket e. Steam is admitted to the jacket through the pipe f, and the condensed water is discharged through the pipe g. The chamber is connected to an exhausting-apparatus through the pipe d, and the unknown and variable quantity of moisture contained in the sand is driven off. Unslaked pulverized lime is then introduced into the chamber and mixed with the sand by means of the rotary agitators m, and an accurately determined quantity of moisture in the form of water or steam is introduced through the perforated pipes i. The materials are discharged through the aperture h. The pipe r serves to admit air and relieve the vacuum in the chamber. In an alternative method of working, the superfluous moisture in the sand is driven off by the heat produced by mixing unslaked lime with the wet sand. Exhaust is not always necessary in this case, a weighted valve being provided which is fully opened during the slaking of the lime.