Show SAVING FUME charles S of salt lake was recently granted a U S patent on an acid smelter fume filter the object of the filter is to purify the smelter fumes of their mechanical ch anical impurities and to recover said impurities puri ties for further treatment if desired at the same time the purified fumes are to be further treated for the recovery of the combustible bus tible gases and other values contained therein the inventor in fig A shows its application to smelter fumes in general the fumes coming from the smelter flue are led through the intake flue I 1 into the recovery tower A said recovery tower has a bottom 2 sloping away from the intake flue and above the entrance of the intake flue there is a grate made of chemical bricks 3 with suitable apertures aper tures entirely across the base of the recovery tower resting upon the said grates are a number of spherical bodies 4 of suitable size and character the openings of the grate are smaller than the diameter of the bodies in the center of the recovery tower is a rotary stirrer 5 having stirring arms 6 at suitable intervals and provided with a pulley 7 or other suitable means for the operation of the same outside of the recovery tower these suitable spherical bodies completely fill said recovery tower and are prevented from falling into the outlet 9 by the grate 3 which as said is composed of chemical bricks insoluble in acids set at suitable intervals across the opening in the said outlet the fumes percolating upward through the irregular apertures aper tures between the suitable spherical 1 bodies lose all their mechanical impurities which become disposed in the interstices slices between the spherical bodies the rotary stirrer 5 is rotated by the means provided at the proper speed and by agitating the spherical bodies the mechanical impurities consisting of gold silver and other valuable metals are permitted to fall down through the spaces in the brick gate to the sloping floor thence they may be drawn off through a manhole and returned to the for the recovery of their valuable constituents by this apparatus all their mechanical impurities are filtered from the fumes preparatory to their passage onward through outlet 10 into other gas treatment alpar co 00 0 60 06 00 3 00 LX e 5 au aalt 5 A LT LAKE LA W atus where any combustible gases contained therein and other values are to be recovered the inventor in this case is going ahead one step farther than any other inventor in attempting to utilize fumes while in the past the annihilation of same has been the method of attacking the problem mr was formerly a metallurgical chemist at the washoe at anaconda montana and has quietly made the smelter fume and of zinc and copper ore a matter of special research work for a number of years past while in nevada and elsewhere |