Method for producing ferrous silicate by purifying and decontaminating smelting residual of copper

Abstract

The invention relates to a comprehensive utilization technology of non-ferrous metal smelting residual, a comprehensive utilization technology of purifying and decontaminating smelting residual of copper, in particular relating to a method for producing a ferrous silicate product by purifying and decontaminating the copper smelting residue in the hypothermal state. The method comprises the following steps: a, heating the copper slag to a molten state or directly selecting the copper slag in a molten state; b, preserving the heat to keep the copper slag in the molten state, and introducing oxygen gas or air so as to react to generate the solid residue into the copper slag; and c, removing the solid residue, and the residue of the heavy metal layer accounting for 4-6% of total weight of the residual at the bottom. The method provided by the invention is energy-saving and environment-friendly, has low cost, can purify and decontaminate the smelting residual of the copper slag in the hydrotherm state at 1150-1300DEG C to produce the ferrous silicate products.

Description

technical field [0001] The present invention relates to a comprehensive utilization technology of non-ferrous metal smelting waste slag, especially the comprehensive utilization technology of copper smelting waste slag, especially relates to a method of purifying copper smelting waste slag in a hot liquid state of 1150°C-1300°C The invention discloses a method for producing ferrous silicate by using copper smelting waste slag for removing impurities to produce ferrous silicate products. Background technique [0002] Copper metal is a non-ferrous metal, which is widely used in the national economy, especially in electromechanical, electric power, telecommunications, inorganic chemical industry, and new material industry. Pyrocopper smelting industry is an important branch of nonferrous metallurgy industry and an important nonferrous metal raw material industry. During copper smelting, SiO in charge 2 , CaO, MgO, Al 2 o 3 , Fe 3 o 4 The mixture enters the electric furnac...

AI Technical Summary

Problems solved by technology

Copper smelting waste slag is 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 80 million tons of copper smelting waste slag, and it is still increasing at a rate of about 10 million tons per year, resulting in a great waste of resources and serious pollution of the environment

[0005] Copper smelting waste slag contains Cu, Fe, Co, S, CaO, MgO, SiO 2 etc., using copper smelting waste slag to recover iron metal alone, there are mature technologies and processes at home and abroad for reference. It is characterized by excessive energy consumption, serious secondary pollution, high comprehensive production cost, poor economic and environmental benefits, and no viability and sustainable development capabilities. Therefore, these methods have no practical value and have not been actually promoted and used so far.