Bulletin Volume 72-74 (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1915 Excerpt: ... all from the heat emitted from the furnace while he is recoking it. On account of the forced draft the wear and tear on the crucible and lining is slightly greater than that of the natural-draft furnace. The oil furnace has the advantage over the other furnaces that it is easier to handle, requiring very little attention; there are no ashes to handle and no cost for removing ashes. The furnace is not hard on the furnace man; he is protected from the heat at all times. In charging the furnace, he has only to shove the ingot of copper into the crucible as these ingots are laid on top of the furnace. One of the disadvantages is the obnoxious gas tnat is thrown out into the shop; another is the roaring noise that is made by the blower. The cost of fuel is higher than with the coke furnace, making the cost of production a little greater than with the coke furnace. The cutting of the crucible and lining are greater than with the coke furnace, as the pressure is greater. In regard to the fuel efficiency of the large coal-fired pit furnaces being less than that of the smaller ones, the loss of efficiency of the large furnace was probably due to the condition of the furnace. Both furnaces were in poor condition and in need of repaire. There was not time to put these furnaces in first-class condition for the tests; the two used were taken at random from a battery of 16. It is thought that both furnaces would have made a much better showing had they been in firsts class condition. The tests were made as if they were on the regular work. There were no special efforts made. The shape of these furnaces, whether round or square, is a matter of opinion; some claim the circular furnace is the better of the two; both have their advantages and disadvantages. The square furna...