Show ANACONDAS NEW COPPER SHINGLE PERFECTED further experiments by the anaconda in connection with the manufacture of metallic shingles made up of an alloy of copper and zinc have resulted in increasing t the be size of the product product ro duct to a len lenth length th of six feet it being believed that this enlarged size will appeal to constructors as a time saver on roofing jobs the anaconda has tried out the life of zinc sheets for roofing and while these have stood up remarkably well they are not to be compared with those of copper tried out upon one of the converter buildings at the washoe reduction works and by making a shingle of an alloy of the two metals it is thought the ideal material has been developed by the addition of copper to the shingle a thinner plate is possible the anaconda has in mind certain improvements to be made at its electrolytic zinc plant at great falls mont according to an address made to the american zinc institute by b y frederick W laist metallurgical manager for the anaconda in which he said that the plans roughed out would result in better recovery better current efficiency and lower operating and plant costs co ats the anacondas plant at great falls is probably the largest zinc plant of any kind in the world today according to dr laist the capacity of which is rated at pounds of zinc per annum from concentrates carrying copper but on the basis of copper free concentrates such as are had in the joplin district the capacity would be stilt still larger r the record monthly production for the plant was made last july when a total of pounds of zinc cathodes were drawn the recovery at the great falls pla plant nt is is 80 per cent approximately with the grade of the zinc zinc concentrates cen running from r 50 per cent to 55 per cent the recovery is higher and on high grade concentrates like those of the joplin district a recovery of 92 per cent to 95 per cent can be had dr laist spoke of copper costs seldom being below 15 cents a pound and from this is had the inference that approximately this figure represents the metal per pound cost of the anaconda |