Theoretical calculations must first know the material composition of the gold mud. It is impossible to conduct a full analysis of each batch of gold mud in actual production, and sometimes it is not allowed to wait until the full analysis result is complete before smelting. This requires determining the limit content of certain elements based on production experience and observation of the oxidation process in smelting, and determining the changes in the content of each component that may occur in the gold mud. It is more practical for small gold mining experience recipes.
1. When the Parmol mine in Canada is smelting, the total amount of solvent added is 2.1 times the total amount of impurities in the gold mud. Wherein each of the total flux percentages: borax 33%, 15% quartz, 10% soda ash, saltpeter 14%, 28% manganese dioxide. Good results achieved during smelting.
2. Some gold mines in Shandong are in the crude gold field, and the charge preparation is prepared according to the weight percentage of each component. Among them, the formula of Linglong Gold Mine is: gold mud accounts for 93-94%, quartz powder accounts for 1%, borax accounts for 4-5%, and sodium carbonate accounts for 2%. The crude formula of Luoshan Gold Mine is that the solvent is only added with borax and quartz powder, and the weight is 12.5%. Add saltpeter and borax during refining, is added to the method: When the melted powder, saltpeter added first, followed by the addition of borax, borax is not completely melted before, borax stick hook iron melt into groups, wipe the surface of the melt back and forth After the impurities are taken out, the nitrate and borax are repeatedly added to the surface of the molten gold for refining until the surface of the melt, such as the water on the lotus leaf, is brightened, so that the gold ingot has a gold content of more than 95%.
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