The Mechanical Handling and Storing of Material

COKE FROM COKE OVENS 383 cally from the receptacle, raised again, and moved off on the runway. Meanwhile the man at the discharging station has set his switch to discharge the oncoming skip into the desired truck. The trench is covered to prevent accidents, and to keep it clear of coke droppings, by a travelling cover of corrugated plates, run- ning over hexagonal drums at each end, and fixed on to the quencher in such a way as always to completely cover the trench; also when the quenching receptacle is travel- ling in either direction, one of the terminal drums of this cover is driven by an electric motor by worm and pinion gear, the speed of travel being 18 ft. per minute. This system has been further improved and simpli- fied by using the quenching receptacle at the same time as a skip, and delivering the coke direct either over a sieve into a bunker, or into railway trucks, so as to dis- pense with the separate loading device. Such an installa- tion is shown in Fig. 542. This illustration shows a section through the pit or canal in front of the battery. The water receptacle a is here portable on wheels, and is divided into two compartments b and c. The perforated quenching vessel d is suspended from a cable <?, and when moving along the canal drags the water receptacle a with it. The funnel f is shown in position before the oven to be pushed, so that the coke falls through this into the quencher. When this has received the contents of the oven, the whole apparatus is drawn by the cable e to the end of the battery where the water tank a remains stationary, whilst the quenching vessel d ascends out of the water, guided by g g, and discharges into bunker h, after which it returns in like manner to the next oven Fig. 541. The Skip of the Ulig Loader. to be dealt with. The great advantage claimed for this system is that the quantity of quenching water used is the smallest possible, and as the water is always at a high temperature, the percentage of moisture in the coke becomes less as the residual heat in the latter evaporates the adherent moisture more readily during transit from pit to bunker. t ig. 542. The Coke Quencher and Loader of Bleichert. Stole, of Farlowitz, in his latest coke plant (Fig. 543), has adopted a water trough or canal similar to the installation shown in Fig. 540, but the canal is not for quenching purposes in this case, but to float the hot coke receptacles, like boats, to the quenching tower, a power- driven water wheel creating the necessary cur- rent for the conveyance of the coke receptacles. The modus operandi is as follows: A floating receptacle is placed in front of the oven to be pressed, which receives the charge which is superficially quenched under a water spray. The vessel is now released, and the final quenching proper is not performed until the floating skip reaches the quenching tower a. Here it is emptied on to a grating b, and completely quenched by the quencher c; the chute d is now lowered and the coke is raised by the lift e, either for classification, or into railway trucks, leaving the breeze beneath the bar screen. Since the skips float rather deeply in the water, they do not