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. 1893 Excerpt: ...for each furnace per day, and though some furnaces produce at times as high as 2,700 pounds per day for weeks together, as I saw by records shown me of the daily runs at some of the works, yet, taking into account fluctuations in the quality of ore, and occasional stoppages for repairs, it is probable that the amount ...
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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. 1893 Excerpt: ...for each furnace per day, and though some furnaces produce at times as high as 2,700 pounds per day for weeks together, as I saw by records shown me of the daily runs at some of the works, yet, taking into account fluctuations in the quality of ore, and occasional stoppages for repairs, it is probable that the amount does not greatly exceed the average given above. Taking into account some improvements in all works, and calling the average 2,250 pounds, and deducting for the temporary shut down at the Granby, and for the time new furnaces have not been at work this year, we may reckon that 65 furnaces have been in full blast all the 366 days of 1892--for these furnaces never stop but for repairs--which have produced an aggregate for the year of 54,000,000 pounds of spelter or metallic zinc. The value of this product is not less than $2,000,000. This is 27,000 tons, which represents fully 65,000 tons of washed ore, of which a little less than one-half is raised in Kansas, the rest coming from Missouri. About one-third of the Kansas ore is used by the Weir City Company. The rest is distributed among other firms, but the St. Louis and one or two other companies nse no Kansas ore. Silicate of zinc requires a special form of furnace for calcining (roasting) it. Robert, Lanyon &, Co. use about five tons of this ore daily, and the Weir City and the St. Louis companies are also provided with the special furnace. As, however, the silicate is more useful in the manufacture of the oxide for paint, it is not likely that its use for making spelter will increase. The average number of men employed to a block of furnaces is about 30, so that the zinc-smelting industry employs in Kansas nearly 1,200 people directly, besides the indirect employment of colliers, railway ...
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