The Practical mechanic's journal . en the upper draught holes in thedoor are stopped, and the furnace stands for 12 hours with the top-opening, a, uncovered, to allow of the passing off of the remaining gasesand vapours in the form of flame. When this discharge ceases, theopening, a, is covered with a metal lid, or with stones covered by alayer of sand, for the purpose of still further moderating the heat duringthe succeeding 12 hours, when the operation is complete; 48 hourshaving expired since the initial charge. The interior of the furnace,and the coke, is still red hot, but, owing to the s
The Practical mechanic's journal . en the upper draught holes in thedoor are stopped, and the furnace stands for 12 hours with the top-opening, a, uncovered, to allow of the passing off of the remaining gasesand vapours in the form of flame. When this discharge ceases, theopening, a, is covered with a metal lid, or with stones covered by alayer of sand, for the purpose of still further moderating the heat duringthe succeeding 12 hours, when the operation is complete; 48 hourshaving expired since the initial charge. The interior of the furnace,and the coke, is still red hot, but, owing to the slight combustibility ofthe latter, the door may be opened, and the coke drawn out with rakes,and quenched with water, without loss. A fresh charge of coal is thenintroduced as quickly as possible, to render available the former heat;and it is always arranged so that the labour may be equally divided overa given space of time, by drawing off one furnace, during the actualcoking of its neighbour. 204 THE PEACTICAL MECHANICS Fig. 4.
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Keywords: ., bookcentury1800, bookdecade1840, bookidpra, booksubjecttechnology
