black flux

noun

, Metallurgy.

1. a reducing flux consisting of finely divided carbon and potassium carbonate.

Example Sentences

Sodium and potassium carbonates are valuable for fluxing off silica; mixed with potassium nitrate sodium carbonate forms a valuable oxidizing fusion mixture; “black flux” is a reducing flux composed of finely divided carbon and potassium carbonate, and formed by deflagrating a mixture of argol with � to � its weight of nitre.

From Project Gutenberg

"Black Flux."—A mixture of finely divided carbon with carbonate of potash or with carbonates of potash and soda.

From Project Gutenberg

Statesmen deal in proximate principles,—unstable compounds; but war reduces facts to their simple elements in its red-hot crucible, with its black flux of carbon and sulphur and nitre.

From Project Gutenberg