E/MJ : engineering and mining journal . e. The mill dis-charges onto a small table where the crushed slag isconcentrated. The concentrates are added to the fur-nace charge, and the ground slag is sacked for ship-ment to the smelter. At the West End mill, the fluxing charge consistsof 3 per cent borax and 5 per cent soda. One manbriquetts from two to two and a half tons of pre-cipitate in an eight-hour shift. At both the Belmontand the West End mills two men are required tohandle the melting. The bars, when cleaned andhammered free from slag, are numbered, marked. December 13 and 20, 1919 Engin
E/MJ : engineering and mining journal . e. The mill dis-charges onto a small table where the crushed slag isconcentrated. The concentrates are added to the fur-nace charge, and the ground slag is sacked for ship-ment to the smelter. At the West End mill, the fluxing charge consistsof 3 per cent borax and 5 per cent soda. One manbriquetts from two to two and a half tons of pre-cipitate in an eight-hour shift. At both the Belmontand the West End mills two men are required tohandle the melting. The bars, when cleaned andhammered free from slag, are numbered, marked. December 13 and 20, 1919 Engineering and Mining Journal 893 and sampled. For sampling, a blacksmiths di-ill-press and 3/16-in. drill are used. Three holes, eachabout one and one-half inches deep, are drilled, twoholes on diagonally opposite corners in the top of thebar and one hole in the center of the bottom. The slag is crushed in a small stamp battery, con-centrated on a small table, and the concentrates, to-gether with all shots, prills, and bullion scraps, are. remelted. The crushed end-slag is allowed to ac-cumulate until there is a sufficient quantity for ashipment to the smeltery. The equipment of all of the refineries is muchthe same. Flat-bcttomed, steam-heated rectangularopen pans are used for drying the precipitate. Mix-ing of flux and precipitate is done by hand, although
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Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectmineralindustries
