Specification of Edward Budd and William Morgan : furnaces for the reduction of copper and other ores."

  • Budd, Edward.
Date:
1855
Catalogue details

Licence: Public Domain Mark

Credit: Specification of Edward Budd and William Morgan : furnaces for the reduction of copper and other ores.". Source: Wellcome Collection.

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    I3udd and Morgans Improvements in Furnaces, fyc. is placed on the opposite side or end of the furnace, whereby a higher tem¬ perature is obtained with the ordinary consumption of fuel, and the injurious influence of the carbonaceous gases on the calcining process is neutralized, thus allowing the heated air introduced by the other set of holes immediately 5 above the ores or metals under process to have its full influence in effect¬ ing their oxydation. The same object may be obtained by admitting the air through two sets of flues having their external openings at the back part of the bridge, (which goes perpendicularly to the ground, and forms the back of the ash-pit,) in the ashpit, about three feet below the grate bars, 10 which openings are about five inches square, each one set of flues having their internal openings at the top of a shield or arch of brick attached to the top of the bridge in the inner side, and extending inwards over the bottom of the furnace about fifteen inches. These openings into the furnaces are about five inches by one inch, and are situated about five inches from the front of 15 the shield ; each flue or external opening supplies air to two or more of these internal openings. To prevent the filling up of these flues by ashes or solid matter coming over from the fire-place, there is placed under each of them an inverted funnel-shaped opening through the whole depth of the shield; the other set of flues have their internal openings in the furnace, four inches 20 wide by three inches in depth, or thereabouts, and enter the furnace on the inner surface of the bridge below the shield or arch, about nine inches above the flat bottom of the calciner, and supply heated air for the oxidation of the ores or metals. If the quantity of air admitted by the first-mentioned set of flues is greater than is required for, or is not consumed in, the combustion 25 of the gases evolved from the fuel, of course the surplus passes into the fur¬ nace, and acts upon the ores or metals in the same way as the air admitted by the second-mentioned set of flues. Both sets of flues are conducted through the brickwork of the bridge (being separated from the fire-place by a partition of fire brick about seven inches thick) to the top of the bridge, 30 where they enter into two separate chambers, the one of which chambers supplies heated air to the first-mentioned set of flues, which crosses the top of the bridge and the shield or arch, for the combustion of the gases evolved from the fuel, and the other supplying heated air to the second-mentioned set of flues for the oxydation of the ores or metals in the furnace, the last- 35 mentioned set of flues simply crossing the top of the bridge, and thence descending to within nine inches of the bottom of the furnace, where they enter the furnace, both sets of chambers being at the same elevation, and both being covered with fire bricks. The quantity of air admitted is regu¬ lated by an iron or other plate suspended before the external openings in the