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The scoria of a volcano. Slag furnace, or Slag hearth (Metal.), a furnace, or hearth, for extracting lead from slags or poor ore. -- Slag wool, mineral wool. See under Mineral.

Of or pertaining to slag; resembling slag; as, slaggy cobalt.

It is rich in lime and contains 14 to 20 per cent of phosphoric acid. Called also Thomas slag, phosphatic slag, and odorless phosphate.

Same as Basic slag, above.

A refractory material used as a furnace lining, obtained by calcining the cinder or slag from the puddling furnace of a rolling mill.

The slag of a furnace, or scoriaceous lava from a volcano. Cinder frame, a framework of wire in front of the tubes of a locomotive, to arrest the escape of cinders. -- Cinder notch (Metal.), the opening in a blast furnace, through which melted cinder flows out.

furnace where anthracite coal in used; vitrified or burnt matter ejected from a volcano; slag.

A minute mineral form like those common in glassy volcanic rocks and some slags, not having a definite crystalline outline and not referable to any mineral species, but marking the first step in the crystallization process. According to their form crystallites are called trichites, belonites, globulites, etc.…

A hole at the back of a puddling furnace, at which the slags pass out. (b) The tap hole of a melting furnace. Knight.

y. Raymond. -- Catalan forge. (Metal.) See under Catalan. -- Forge cinder, the dross or slag form a forge or bloomary. -- Forge rolls, Forge train, the train of rolls by which a bloom is converted into puddle bars. -- Forge wagon (Mil.), a wagon fitted up for transporting a blackmith's forge and tools. -- Portable…

The formation of frit or slag by heat with but incipient fusion.

nickel, copper, and zinc in varying proportions, and was originally made from old copper slag at Henneberg. A small amount of iron is sometimes added to make it whiter and harder. It is essentially identical with the Chinese alloy packfong. It was formerly much used for tableware, knife handles, frames, cases, bearing…

rom a bloom or puddle bar for conversion into merchant iron in the mill. -- Mill cinder, slag from a puddling furnace. -- Mill head, the head of water employed to turn the wheel of a mill. -- Mill pick, a pick for dressing millstones. -- Mill pond, a pond that supplies the water for a mill. -- Mill race, the canal…

fibrous wool-like material, made by blowing a powerful jet of air or steam through melted slag. It is a poor conductor of heat.

Tin extracted from the slag.

(Chem.), a method of obtaining chlorine gas by passing hydrochloric acid gas over heated slag which has been previously saturated with a solution of some metallic salt, as sulphate of copper. -- Final process (Practice), a writ of execution in an action at law. Burrill. -- In process, in the condition of advance, ac…

The recrement of metals in fusion, or the slag rejected after the eduction of metallic ores; dross.

The act, process, or result of scorifying, or reducing to a slag; hence, the separation from earthy matter by means of a slag; as, the scorification of ores.

To reduce to scoria or slag; specifically, in assaying, to fuse so as to separate the gangue and earthy material, with borax, lead, soda, etc., thus leaving the gold and silver in a lead button; hence, to separate from, or by means of, a slag.

ring barrel, a tumbling barrel. See under Tumbling. -- Scouring cinder (Metal.), a basic slag, which attacks the lining of a shaft furnace. Raymond. -- Scouring rush. (Bot.) See Dutch rush, under Dutch. -- Scouring stock (Woolen Manuf.), a kind of fulling mill.