Comprehensive utilization method for copper containing ferro-sulphur ore

Abstract

The invention discloses a method for comprehensively utilizing copper-bearing pyrite resources, which comprises the steps: copper-bearing medium- and low-grade pyrite ore which is difficult in flotation separation of copper and sulfur is levigated, and copper-bearing high-grade sulfur concentrated ore can be obtained after copper and sulfur bulk flotation and a plurality of times of refinement, the concentrated ore is put into a fluidized-bed furnace for high temperature peroxy roasting, the sulfuric acid is manufactured after flue gas is dedusted and purified, cinder becomes high-iron and low-sulfur type copper-bearing dregs, the cinder is added with a pellet adhesive agent and a chlorating agent for wet grinding and producing pellets, and the pellets undergo high temperature chlorination volatilizing roasting after being dried, copper concentrated ore is obtained after the dust collection to roasting fume, and the roasting pellets are high quality iron-making raw materials with ironcontent larger than 60 percent and copper content less than 0.1 percent. The invention has the advantages that through copper sulfur mixing floatation, a plurality of times of refinement, high temperature proxy roasting and deep desulfurizing and high temperature chlorination roasting decoppering, the copper resources lost in sulfur iron caused by difficult flotation separation of copper and sulfur can be recovered efficiently, and the sulfuric acid is obtained, simultaneously the high quality iron pellet ore is obtained, in addition, the iron resource is utilized efficiently.

Description

A method for comprehensive utilization of copper-containing pyrite resources technical field The invention belongs to the technical field of beneficiation and metallurgy, and relates to a method for comprehensively recycling copper, iron and sulfur resources from copper-containing pyrite that is difficult to separate by copper-sulfur flotation. Background technique Copper sulfide ore often coexists with pyrite, and the recycling of copper resources must involve the separation of copper sulfide ore and pyrite. Due to the dense symbiosis of copper and sulfur, the surface properties of copper sulfide minerals and pyrite are similar, and the separation of mineral processing is difficult, so a considerable part of copper sulfide ore is lost in pyrite, resulting in the loss of a large amount of copper resources. Therefore, separation of copper and sulfur has always been the field of mineral processing. There is no fundamentally resolved hotspot issue. Pyrite is composed of iro...

AI Technical Summary

Problems solved by technology

Due to the difficulty in beneficiation of sulfuric acid slag, the recovery rate of iron is low, and the waste of iron resources is large. At the same time, in the process of magnetic separation, since non-ferrous metals such as copper, lead, and zinc are not magnetic, they will also be lost in large quantities in the tailings, causing non-ferrous metals loss of

The inventor applied for and obtained the patent right, the patent number is ZL200410079527.4 "Production method of high-iron and low-sulfur pyrite slag", which does not involve copper-containing pyrite raw materials that are difficult to separate copper and sulfur, and there is no It is a means of recovering copper, so for copper-containing pyrite concentrate, this method cannot obtain copper-containing qualified iron concentrate

Based on the above technical conditions, at present, a large amount of copper-containing pyrite resources formed due to the difficulty of separating copper and sulfur can only be extracted from sulfuric acid, and the iron in it is stored in the form of copper-containing low-grade slag, which seriously pollutes the environment. If a Advanced technology and methods enable efficient recycling of copper, iron and sulfur, which will produce good economic and environmental benefits

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