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ES710A1879-12-311879-12-31
A metallurgical procedure for extracting precious metals, as an alloy, using copper and its combinations with sulfur.
ExpiredES710A1
(en)
procedures for the continuous extraction of metals, to obtain metallic iron, sodium carbonate from carbon dioxide gas and foundry slag and to determine the required quantities of iron as reducing agent and sodium carbonate as flux, method for extraction of common and precious metals and of gold and silver, and process for extraction of metallic iron
Method for treating residues comprising zinc ferrites and non-ferrous metals, which includes the stages of roasting the residues in an oxidizing medium at an elevated temperature, reduction by carburation / fusion, extraction of liquid phase from the broth and slag, and extraction in vapor phase of non-ferrous metals.
Method that feeds paste material whose solid phase contains refractory sulfide and which comprises precious metal, sulfides, hg and halogen, oxidizes at high temperature and pressure, converts sulfides into sulfate and obtains material with oxidized precious metal, inhibiting the dissolution of hg from the material and recovers precious metal.