Method for producing ferrous metasilicate by using smelting waste slag of nickel, copper and cobalt

Abstract

The present invention relates to a comprehensive utilization technology for smelting waste slag of nickel, copper and cobalt, especially a method for producing ferrous metasilicate by purifying the smelting waste slag of nickel, copper and cobalt with a high temperature thermal solution status. The method includes the steps of a. heating the nickel, copper and cobalt slag to a molten state or fetching the nickel, copper and cobalt slag of the molten state directly; b. holding the nickel, copper and cobalt slag with the molten state by heat insulation, at the same time infusing oxygen or air into the nickel, copper and cobalt slag to react to generate solid residue; c. removing the solid residue; the method of the invention is energy-saving and environment protection, has low cost, and it is capable of producing ferrous metasilicate products by purifying the nickel, copper and cobalt smelting waste slag with a thermal solution status.

Description

technical field [0001] The invention relates to a comprehensive utilization technology of nickel, copper and cobalt smelting waste slag, in particular to a method of purifying and removing impurities from nickel, copper and cobalt smelting waste slag in a high-temperature hydrothermal state to produce ferrous silicate products A method for producing ferrous silicate by using nickel, copper and cobalt smelting waste slag. Background technique [0002] Nickel, copper, and cobalt are all non-ferrous metals, which are widely used in the national economy, especially in steel, aerospace, electromechanical, electric power, telecommunications, inorganic chemicals, and new material industries. The pyro-process nickel, copper and cobalt smelting industry is an important branch of the non-ferrous metallurgy industry and an important non-ferrous metal raw material industry. SiO in charge during nickel, copper and cobalt smelting 2 , CaO, MgO, Al 2 o 3 , Fe 3 o 4 The mixture enters...

AI Technical Summary

Problems solved by technology

Nickel, copper, and cobalt smelting waste slags are piled up after cooling, occupying a large amount of land and causing serious pollution to the environment

[0004] At present, my country has accumulated about 10 million tons of nickel, copper, and cobalt smelting waste slag, and it is still increasing at a rate of about 1.8 million tons per year, resulting in a great waste of resources and serious environmental pollution.

[0005] Ni, Cu, Fe, Co, S, CaO, MgO, SiO are contained in nickel, copper, and cobalt smelting waste slag 2 etc., using the nickel, copper, cobalt smelting waste slag to simply recover iron metal, there are mature technical processes at home and abroad for reference, but so far, when these technical processes are dealing with nickel, copper, cobalt smelting waste The common characteristics of these technologies are excessive energy consumption, serious secondary pollution, high comprehensive production costs, poor economic and environmental benefits, and no viability and sustainable development capabilities. Therefore, these methods are not practical value, but has not been practically promoted and used so far