Method for copper slag tailings pulp smoke desulfurization cooperating with copper resource efficient recovery

Abstract

The invention discloses a method for copper slag tailings pulp smoke desulfurization cooperating with copper resource efficient recovery. Copper slag tailings are adopted as a smoke desulfurizer. Firstly, the slag tailings and water are added into a pulp mixing tank according to a ratio, stirring and mixing are conducted, the mixture is evenly added into a desulfurization tower, smoke reacts withan absorbent through the desulfurization tower, Fe and Cu leached out from pulp liquid can significantly promote the smoke desulfurization effect, the purified smoke is discharged through a chimney, and acid desulfurization liquid is introduced into a zinc production section. Pulp liquid entering a zinc sulfate or electrolytic zinc purification section can be subjected to iron precipitation undercertain pH through iron leached out from the slag tailings, afterwards, cadmium is removed through replacement, zinc sulfate is prepared with copper, and copper can be recovered from filter residues.According to the method, the removal rate of 95% or above is achieved for low-concentration SO2 through the copper slag tailings of smelting tailings, and valuable metal copper with high additional value in the copper slag tailings is leached out and recovered. The method is simple in process, the used desulfurization absorbent is low in cost, energy consumption is low, benefits of an enterprise can be increased, and the method is an efficient utilization method integrating smoke desulfurization and slag tailings recycling comprehensive recovery.

Description

technical field [0001] The invention relates to a method for coordinating the efficient recovery of copper resources with flue gas desulfurization of copper slag tailings pulp, and belongs to the fields of air pollution control and tailings resource utilization. Background technique [0002] Copper ore is an extremely important mineral resource. As of the end of 2015, my country's ascertained copper ore resource reserves were 99.103 million tons. These copper ore resources are widely distributed in my country, relatively concentrated in Tibet, Jiangxi, Yunnan and other provinces. In recent years, my country's copper mines have been used a lot. On average, for every 1 ton of copper produced, about 1 to 2 tons of slag tailings are produced. The components are complex and often contain valuable metals such as Fe, Zn, Ca, Mn, Al, and Cu. and a small amount of precious metals such as Ag and Au, in which the content of Fe is 40%-50%, which is much higher than the average industrial...

AI Technical Summary

Problems solved by technology

Based on the traditional acid leaching and chemical precipitation process, the present invention simplifies the traditional flue gas desulfurization, iron-containing acid leaching solution treatment and wet-method zinc leaching solution purification method, has high iron and arsenic removal efficiency, and solves the problems of copper slag tailing utilization and flue gas desulfurization To deal with the iron and heavy metal purification problems existing in the hydrometallurgy zinc smelting process, use the traditional hydromethod zinc smelting section to replace, enrich and recover copper