Method for producing nickel-iron-containing mixed slag

Abstract

The invention relates to a method for producing nickel-iron-containing mixed slag. The method comprises the following steps: S1, furnace slag mixing: adding nickel smelting slag into a reaction device, and adding one or more of lead smelting slag, blast furnace slag, steel slag and ferroalloy slag, thus forming the mixed slag; heating the mixed slag into a molten state, and adding one or more of acopper oxide mineral, a copper sulphide mineral, a nickel oxide mineral, a nickel sulfide mineral and a copper-containing material; uniformly mixing the materials to obtain reaction slag, monitoringthe reaction slag in real time, and treating the mixed reaction slag through regulation and control to enable the mixed reaction slag to simultaneously meet conditions a and b, thus obtaining reactedslag; S2, separation and recycling. The method for producing the nickel-iron-containing mixed slag is short in reaction time, short in technological process, high in metal recycling rate, low in production cost, high in treatment capacity, environmentally friendly and high in economical benefit, and effectively solves the problem in efficient recycling of metallurgical resources and heat energy.

Description

technical field [0001] The invention belongs to the technical field of slag metallurgy, and in particular relates to a method for producing mixed slag containing nickel and iron. Background technique [0002] In the process of nickel pyrometallurgy, a large amount of nickel smelting slag is produced. Nickel smelting slag includes nickel smelting slag produced by the "matte smelting" process, depleted slag produced by the "copper matte blowing" process, and top blowing smelting. of nickel sedimentation slag. my country's Jinchuan Company adopts "flash smelting" and "top blowing smelting" for nickel concentrate smelting, which produces 1 million tons of nickel smelting slag every year, and the cumulative storage volume currently exceeds 10 million tons. Valuable components such as copper, iron, nickel, cobalt, zinc, lead, gold, and silver in nickel smelting slag are stacked for a long time, which not only wastes resources but also pollutes the environment. [0003] The iron ...

AI Technical Summary

Problems solved by technology

The method has short reaction time, short process flow, high metal recovery rate, low production cost, large processing capacity, environmental friendliness, high economic benefits, and can effectively solve the problem of efficient recovery and utilization of metallurgical resources and heat energy; the invention is a new melting The slag metallurgical process not only reduces the copper content in the slag to make the copper content in the slag <0.1wt%, but also realizes the efficient recovery of copper, nickel, cobalt, gold, silver, iron, zinc, lead, indium, bismuth, sodium, and potassium Processing of copper and nickel materials, obtaining low-copper and iron-containing materials (iron concentrate and pig iron), and solving the current problems of massive accumulation of slag, environmental pollution, and heavy metal element pollution