Annual report of the State Mineralogist for the year ending ... . Fd< In working this furnace the charge should never contain over a thirdof its volume in lead. If richer ore is to be treated, it must be reducedto this proportion by the addition of poor slags. To prevent the walls from getting too hot, and preserve the bricksfrom burning or melting, care has to be taken in charging to throw thefuel towards the center and the ore towards the walls. Attention hasto be paid to the proper regulation of the temperature, as a too highdegree of heat will cause loss of lead by volatilization.
Annual report of the State Mineralogist for the year ending ... . Fd< In working this furnace the charge should never contain over a thirdof its volume in lead. If richer ore is to be treated, it must be reducedto this proportion by the addition of poor slags. To prevent the walls from getting too hot, and preserve the bricksfrom burning or melting, care has to be taken in charging to throw thefuel towards the center and the ore towards the walls. Attention hasto be paid to the proper regulation of the temperature, as a too highdegree of heat will cause loss of lead by volatilization. As long as theslag flows liquid and readily, the cooler the furnace is kept the better. Some ferruginous ore is usually added at intervals during the operation. The slag flows continuously into cast-iron wagons, from which it isdumped after having cooled down. The advantage of this is that if at any time the furnace should runlead or matte, it can easily be recovered. The establishment should be provided with an extensive condensingapparatus, as a considerable
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Keywords: ., bookcentury1800, booksubjectgeology, booksubjectminesandmineralr
