With the development of the industry, our technology is also constantly improving, expert analysis of ordinary steel cotton is susceptible to inorganic acid decomposition, the desorption of gold and silver in the electrolyte, the extraction of acid can be used to decompose all steel cotton after separation and smelting. It is not like a reusable stainless steel cotton to flush out the mud, there are always some gold mud residue on the steel cotton. Ordinary steel cotton desorption electrolysis method is suitable for the user to provide gold carbon electrolysis and extraction from gold mud gold and silver services. The production of dilute sulfuric acid decomposition steel cotton is crystal-shaped ferrous sulfate, and its aqueous solution is very easy to filter by the dilute sulfuric acid method and the usual method of nitric acid and hydrochloric acid method. Ferrous sulfate is a reduction agent, stable in the air, gold and silver in this solution is virtually no loss.