Smelting method for separating value metals from anode mud by firing process and device thereof

Abstract

The present invention relates to a smelting method for separating and extracting noble and base metals during anode mud pyrogenic attack process and the device thereof, belonging to the field of nonferrous metallurgical industry. The smelting compositions only includes anode mud and nut coke, continuous oxidation-reduction smelting is carried out on the anode mud by oxygen bottom blown smelting method, gold, silver, copper and bismuth are enriched, arsenic and stibium are volatilized, silicon and lead are slagged, the smelting process is divided into two processes: one is the process of bottom oxidative slagging of oxygen and noble lead or bottom lead; the other is the process of reducing volatilization of coke on the slag surface, the two processes are two continuous combined cycle smelting processes finished in a same furnace and during the same time, the smelting process is non-alkali low-silicon high-lead-slag type, the mass ratio of the SiO2 to PbO is 0.2 to 0.5. The invention has the advantages of low cost, large handling capacity, low energy comsuption, long using period of refractory lining, high direct recovery rate of gold, silver, copper, stibium and bismuth, strong adaptability to raw materials, high automation level, etc.

Description

Technical field: [0001] The invention relates to a smelting method and a device for separating valuable metals in anode slime by pyromethod separation and extracting precious and base metals during the pyromelting process of anode slime in the nonferrous metal smelting industry. Background technique: [0002] Anode slime mainly contains valuable elements such as gold, silver, antimony, copper, bismuth, lead, and arsenic. At present, there are two types of anode slime treatment processes at home and abroad: one is the traditional pyrotechnic process, and the other is the wet and semi-wet process. The former is suitable for low-grade, large-scale anode slime treatment, and the latter is suitable for gold-bearing High-volume and small-volume anode slime treatment manufacturers. At present, the anode mud fire process at home and abroad is developing in the direction of large-scale equipment and automation. [0003] The traditional pyrotechnic process of lead anode slime is tha...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of short furnace life, relatively small processing capacity and relatively scattered distribution of valuable metals in the traditional anode slime reduction smelting process. Under the action of stirring, the method of continuous feeding is adopted. Oxygen is sprayed into the noble lead or bottom lead from the bottom, and the coke and the slag in the molten pool are stirred and reacted to form a reducing atmosphere. The slag-forming components in the material and the molten Lead oxide slag forms binary or ternary slag together. Part of the arsenic and antimony volatilizes during the melting process, and part of the arsenic and antimony slag is reduced and volatilized by coking ding, so that the valuable metals are effectively separated, and the mixed materials are simultaneously in the furnace. A smelting method and device for separating valuable metals in anode slime by pyromethod separation in the cyclic composite smelting process of oxidation slagging and reduction volatilization, so as to prolong the service life of the anode slime pyrotechnic noble lead furnace, increase the processing capacity, reduce the cost, and reduce the cost of antimony Bismuth and copper are enriched in soot and noble lead respectively

Images