Comprehensive method for separating stibium from materials containing stibium, tin and lead

Abstract

The invention provides a comprehensive method for separating stibium from materials containing the stibium, tin and lead, which is suitable for removing the stibium and recovering other valuable metals from tin lead materials containing stibium with high content. The invention puts an emphasis on that the comprehensive method comprises the following steps of: granulating the materials containing the stibium to manufacture irregular tin grains with the thicknesses of 2-5 mm and the grain diameters of 2-30 mm; then placing tin grain sheets into an anode frame lined with acid-resisting fibers to manufacture a tin grain anode; placing the fine tin lead materials as starting sheets into an electrolytic cell filled with silicofluoric acids to carry out electrolysis by electrifying DC, wherein tin and lead metals are electrolyzed and deposited on a cathode to obtain a cathode product with total tin and lead content more than 99.8 percent and stibium content less than 0.2 percent, and the valuable metals, i.e. the stibium, gold, silver, and the like, are gathered in anode mud; and finally recovering the valuable metals, i.e. the stibium, the gold and the silver, from the anode mud. A wet-process metallurgical process has advanced and reasonable process and can greatly enlarge the contact area of electrolyte and the anode, reduce the current density during the electrolysis and eliminate the anode passivation phenomena.

Description

technical field [0001] The present invention is a method for the comprehensive recovery and utilization of antimony-containing materials in the tin or lead smelting process, especially suitable for the treatment of high-antimony tin-lead materials in the tin or lead smelting process, and comprehensively recovers tin, lead, antimony, Valuable metals such as silver and gold. Background technique [0002] High-antimony tin material is a kind of tin material obtained by adding aluminum to remove antimony and arsenic in the pyro-refining process of crude tin, and then smelting it separately. It was initially used as a raw material for the production of babbitt alloys, but due to the small market of babbitt alloys, its grade and quantity were restricted by the market. If refining and soldering products are produced, antimony must first be refined and removed, and the traditional fire refining process will be used to produce a large amount of aluminum slag, resulting in increased ...

AI Technical Summary

Problems solved by technology

However, when the anode contains more than 0.4% Sb, the electrochemical dissolution of tin and lead is difficult due to the dense network structure of Sn-Sb and Sn-Pb alloys, resulting in an anode passivation effect

As a result, problems such as large anode polarization potential, increased cell voltage, increased energy consumption, low current efficiency, high anode residual rate, low tin-lead metal recovery rate, and heavy burden on the tin-lead recovery system

Aiming at the phenomenon of anode passivation in the electrolysis of high antimony tin materials, although the periodic reverse method, casting thin anode method and low current density method can be used in the actual electrolysis process, the processing capacity of high antimony tin materials is small and the production efficiency is low. Low

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