. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . rton, as this work is largely automatic. The average temperature ° F., and the ore is roasted down to about 0-5 per cent sulphur. A modification of this type is shown in Fig. 1. in which thedraft-stack is cut off and surmounted by a bell, the draft beingdownward and outward at the bottom of the kiln. In this case theore is dropped from self-dumping cars directly on to the bell whiclidistributes the charge, an
. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . rton, as this work is largely automatic. The average temperature ° F., and the ore is roasted down to about 0-5 per cent sulphur. A modification of this type is shown in Fig. 1. in which thedraft-stack is cut off and surmounted by a bell, the draft beingdownward and outward at the bottom of the kiln. In this case theore is dropped from self-dumping cars directly on to the bell whiclidistributes the charge, and falling by gravity is drawn directly intothe furnace barrows, thus avoiding all handling of ore from themine to the furnace-top. Mechanical Hearth-Furnaces.—TTie Rotary-Pan Furnace (Fig. 2) used at the Hailemine. North Carolina, for roasting fine pyrites for chlorination, is a combination of the rever-beratory furnace with the mechanical hearth-furnace. It is a reverberatory furnace withstep-hearths and a circular rotating hearth at the fire-box end. The charge is fed at the flueend and gradually worked forward by hand to the circular hearth, where the roasting is fin-. FiG 1.—Roastiug-furnace.
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Keywords: ., bookcentury1800, bookdecade189, booksubjectmechanicalengineering
