Comprehensive recovery method for ferro-sulphur ore containing copper, zinc and iron multi-metal

Abstract

The invention discloses a method for comprehensively recovering polymetallic sulfurous iron ores containing copper, zinc and iron, which comprises the following steps: adding a strong inhibitor into the sulfurous iron ores first, controlling the pH value to be more than or equal to 11, adding a collector and a foaming agent into the mixture, and preferably performing flotation on copper and zinc; and activating tailings by an activator, adding the collector and the foaming agent into the tailings for floatation of sulfur, guaranteeing sulfur concentrate S is more than or equal to 47 percent, performing roasting, using flue gas to prepare a sulfuric acid, and directly using roasted sulfate slag to manufacture iron pellets. The method not only widens the application scope of copper-zinc bulk concentrate treatment grade but also recovers useful elements in the ores with low cost and high quality, not only recovers the copper with high yield but also recovers the zinc with high yield, avoids resource waste, greatly improves the surrounding environment, and eliminates zinc pollution. The tailings are activated by the activator, and the collector and the foaming agent are added into the tailings for flotation of the sulfur; the sulfur concentrate S is guaranteed to be more than or equal to 47 percent and roasted at a temperature of between 900 and 1,150 DEG C; the flue gas is used for preparing the sulfuric acid; and Fe in the roasted sulfate slag is more than or equal to 62 percent, and the roasted sulfate slag can be directly manufactured into the iron pellets which are then sold to iron mills, so that the aim of comprehensive recycle is achieved.

Description

technical field [0001] The invention relates to a method for comprehensively recovering polymetallic, in particular to a method for comprehensively recovering copper-zinc-iron-iron polymetallic pyrite, which belongs to the technical field of metallurgy. Background technique [0002] Pyrite is an important chemical mineral raw material, mainly used in the manufacture of sulfuric acid, and partly used in chemical raw materials to produce sulfur and various sulfur compounds; it is widely used in rubber, paper, textile, food, matches and other industries as well as agriculture There are important uses; especially in the defense industry for the manufacture of various explosives, smoke agents and so on. At present, the production of pyrite is to directly roast high-sulfur iron (concentrate) ore (sulfur content ≥ 25%), and the flue gas is used to prepare sulfuric acid. Most of the metals such as copper, zinc and iron in it become oxidized after roasting. These oxides are difficul...

AI Technical Summary

Problems solved by technology

At present, the production of pyrite is to directly roast high-sulfur iron (concentrate) ore (sulfur content ≥ 25%), and the flue gas is used to prepare sulfuric acid. Most of the metals such as copper, zinc and iron in it become oxidized after roasting. These oxides are difficult to recycle, and some enterprises simply discard them, which not only causes metal loss and affects economic benefits, but also pollutes the surrounding environment

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