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. 1914 Excerpt: ...because to shut off any considerable part of the flue system interferes with the working of the furnaces. Thirty or 40 men are often put on at once and when the work is not let out on contract the men are not required to work for long hours. Sometimes they work only five hours a day. As to the sprinkling of the flue ...
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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. 1914 Excerpt: ...because to shut off any considerable part of the flue system interferes with the working of the furnaces. Thirty or 40 men are often put on at once and when the work is not let out on contract the men are not required to work for long hours. Sometimes they work only five hours a day. As to the sprinkling of the flue dust, one manager says that it is possible to sprinkle the bag-house dust, but not that in the flues, because the latter is hot and the steam would be excessive. Usually the opinion is that if the sulphate in flue dust is all combined, as it is in the dust from copper converters and from white lead, it can be dampened down without harm, but dust from reverberatory furnaces has free SOs which with the water would form sulphuric acid and eat into men's clothing and cause painful burns on their skin. The success of the Midvale system comes from the neutralization of the S03 practiced there. However, even in bag houses and flues which receive only lead sulphate dust, without free SOs, the dust is sometimes handled dry, because sprinkling is said to stir up so much dust. Of course if the trouble from sulphuric acid could be eliminated there is no comparison between the danger of working with wet paste and with fluffy dust. As to the objection to sprinkling that it raises so much dust, this is true, as can be seen in any dusty street when the stream from a hose is turned on it with too much force, but no one would advocate cleaning the street by dry sweeping instead. The dust can be laid without much difficulty by a slower sprinkling. In those plants where the flue dust is made into briquettes there is a real advantage in having the stuff already damp and pasty. Muller objects on practical grounds to wetting the dust in the flues, because if the water...
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