Century Dictionary and Cyclopedia
- n. In assaying, a method of assay of the precious metals, performed by fusion of the ore with metallic lead and borax in a so-called scorifier. In this operation, the silver with the gold is taken up by the lead, the superfluous lead and the base oxids being separated in the form of a slag or scoria. The metallic mass obtained is afterward treated by the cupellation process to separate the gold and silver.
- n. In metallurgy, the treatment of a metal with lead in the refining process. Copper intended for rolling into sheets is sometimes thus treated in order that traces of antimony and other foreign metals may be removed. These combine with the oxid of lead, which rises to the surface of the molten copper in the form of a slag or scoria, which is then skimmed off before casting.
GNU Webster's 1913
- n. (Chem.) The act, process, or result of scorifying, or reducing to a slag; hence, the separation from earthy matter by means of a slag.
“In every case the alloy is introduced at the moment of pouring, as is the case in the Bessemer or Martin process, taking care to cover the fusion with charcoal in order to prevent the contact with air, together with the use of some kind of a flux to aid in the scorification of the manganese.”
“The object of the fusion in a crucible, like that of scorification, is to concentrate the silver in a button of lead which is to be subsequently cupelled; and to retain the earthy and waste matters in the slag.”
“The scorification assay is performed in a scorifier, which is a shallow open-mouthed dish about 2-1/2 inches across, with a very thick bottom to enable it to withstand the corrosive action of the slag.”
“The weight of nickel corresponding to the arsenide got is calculated by multiplying by 0.607; and, similarly, the weight of the cobalt is ascertained by multiplying the loss in the last scorification by”
“If the scorification has been unsatisfactory, the quantity of silver obtained from the slag will be by no means inconsiderable.”
“In some cases this preliminary scorification is advantageous or even necessary: this may be because the lead is hard and impure, or it may be that a very small button of gold is expected.”
“The cupellation of large quantities of alloy or of alloys which contain tin, antimony, iron, or any substance which produces a scoria, or corrodes the cupel, must be preceded by a scorification.”
“Silver ore, crucible assay of, 90 metallic particles in, 108 scorification of, 88”
“Continue the scorification until a film, green when cold, floating on the surface of the button shows that the nickel is beginning to oxidise.”
“Dry the residue and concentrate the silver in a button of lead by pot method or scorification, according to the amount of stony matter present.”
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