The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Fuming

a method of recovering volatile components from fused slags containing zinc, lead, or tin. Slags containing lead and zinc are blasted with a coal and air mixture at 1200°–1250°C to reduce the oxides of lead and zinc; natural gas may be used in place of coal dust in the mixture. The metal vapors are removed with the gases and react with carbon dioxide to form oxidized sublimates; after being cooled in a waste-heat boiler, the sublimates are recovered in bag filters. The process is carried out in a rectangular shaft furnace equipped with 40–50 tuyeres. In order to obtain pure zinc oxide and to separate the lead oxides from it, the sublimates are roasted in a rotary furnace. When tin-bearing slags are fumed, the tin is removed as the volatile sulfide.

REFERENCE

Osnovy metallurgii, vol. 2. Moscow, 1962. Pages 415–21.

M. M. LAKERNIK

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References in periodicals archive

In those instances when a firearms examination is to be done or anticipated, each chamber opening (e.g., the cylinder of a revolver) and each barrel opening should be covered with a small piece of tape (just large enough to cover the opening) before fuming with glue.

Cyanoacrylate fuming (microburst method)

The one technique that developed identifiable latent prints most often was glue fuming in conjunction with regular magnetic fingerprint powder.

Initially, the researchers believed that the special fluorescent powder provided the key to obtaining usable prints, but additional tests proved that the type of powder did not matter as much as the amount of time allowed for glue fuming.

Hidden evidence: latent prints on human skin

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