Scorifier

A Scorifier is a refractory ceramic cup or crucible used in the process of scorification, a pyrometallurgical method primarily used to separate precious metals (like gold and silver) from base metals and other impurities. The Scorifier typically contains a charge of a metal-containing material mixed with a flux, and is then subjected to high heat in a furnace. The flux facilitates the oxidation of base metals and the formation of a slag, which absorbs these oxides and allows them to be separated from the precious metals, which collect at the bottom in a molten state. Scorifiers are designed to withstand the high temperatures and corrosive environment involved in this process, often made of materials like bone ash, magnesia, or clay. Their size and shape can vary depending on the scale of the operation and the nature of the material being processed.

Scorifier meaning with examples

• The metallurgist carefully loaded the ore sample mixed with a borax flux into the Scorifier, preparing it for the critical separation of the gold flecks from the unwanted rock. The high-temperature furnace was carefully calibrated to ensure the complete oxidation of the base metals and an efficient scorification process.
• During the assay, several scorifiers were prepared containing lead oxide, acting as a collector for the precious metals. After the furnace cycle, the resulting slag was discarded, and the molten lead button containing the gold and silver was separated for further processing, including cupellation.
• Experienced assayers carefully selected the appropriate type of Scorifier based on the composition of the ore. Some scorifiers, made of magnesia, are preferred for materials containing high silica concentrations, due to the crucible's chemical resistance under those conditions. These prevent crucible damage.
• After prolonged use, the Scorifier started to show signs of wear, displaying cracks, due to the extreme temperatures. They were replaced with new ones. Careful handling and preheating help to prolong the scorifier's lifespan and maximize efficiency. The process requires constant monitoring.
• The process of removing the molten lead button from the Scorifier after the scorification stage must be performed with extreme caution. Scorifiers are very hot, so all protective gear is required to avoid burns. This stage is crucial for the accurate analysis of precious metal content.