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A method for producing ferrous silicate by using copper smelting waste slag to purify and remove impurities

A technology for purification and removal of impurities and ferrous silicate, applied in the removal of aluminum silicate, silicate, solid waste, etc. problems, to achieve good fluidity and chemical activity, reduce pollution, and save energy

Inactive Publication Date: 2011-12-28
牛庆君
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: A method for producing ferrous silicate by using copper smelting waste slag to purify and remove impurities. The treatment method includes the following steps: heating the copper slag to a molten state, and keeping the copper slag in a molten state by heat preservation, wherein the copper in the molten state Slag refers to the temperature at 1150°C-1300°C. At the same time, oxygen is introduced into the copper slag in order to react to form a solid residue. -10 minutes, until this solid residue no longer generates, remove above-mentioned solid residue, remove the bottom account for the residue of 4%-6% heavy metal layer of slag gross weight, get final product ferrous silicate, the molecular formula of ferrous silicate is FeSiO 3 2FeO SiO 2 .

Embodiment 2

[0026] Embodiment 2: A method for producing ferrous silicate by using copper smelting waste slag to purify and remove impurities. The treatment method includes the following steps: heating the copper slag to a molten state, keeping the copper slag in a molten state by heat preservation, wherein the molten copper Slag refers to the temperature at 1150°C-1300°C, and at the same time, air is introduced into the copper slag to react to form solid residue. -10 minutes, until the solid residue is no longer generated, remove the above-mentioned solid residue and remove the residue of the heavy metal layer that accounts for 4%-6% of the total weight of the slag at the bottom to get ferrous silicate. The molecular formula of ferrous silicate is FeSiO 3 2FeO SiO 2 .

Embodiment 3

[0027] Embodiment 3: A method for producing ferrous silicate by using copper smelting waste slag to purify and remove impurities. The treatment method includes the following steps: heating the copper slag to a molten state, and keeping the copper slag in a molten state by heat preservation, wherein the copper in the molten state Slag refers to the temperature at 1150°C-1300°C. Measure the content of potassium ions and sodium ions in copper slag. When the weight percentage of potassium ions is greater than 0.05%, and the weight percentage of sodium ions is greater than 0.05%, the copper slag In order to feed chlorine gas to react to generate solid residue, the amount of chlorine gas is 0.1-0.25 cubic meters per ton of copper slag, and the feeding time of chlorine gas is 5-10 minutes until the solid residue is no longer generated So far, remove the above-mentioned solid residue, and remove the residue of the heavy metal layer at the bottom of 4%-6% of the total weight of the slag...

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Abstract

The present invention relates to a comprehensive utilization technology of non-ferrous metal smelting waste slag, a comprehensive utilization technology of copper smelting waste slag purification and impurity removal, in particular to a method of purifying and removing impurities from copper smelting waste slag in a high-temperature hydrothermal state to produce silicate A method for producing ferrous silicate by using copper smelting waste slag to purify and remove impurities for iron products. The method includes the following steps: a. heating the copper slag to a molten state or directly taking the molten copper slag; b. heat preservation to make the copper Keep the slag in a molten state, and simultaneously feed oxygen or air into the copper slag so as to react to generate solid residue; c, remove the above-mentioned solid residue, and remove the residue of the heavy metal layer that accounts for 4%-6% of the total weight of the slag at the bottom; The method provided by the invention is energy-saving, environment-friendly and low-cost, and can purify and remove impurities from copper smelting waste slag in a hydrothermal state, that is, at 1150°C-1300°C, to produce 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/26B09B3/00
Inventor 牛庆君
Owner 牛庆君
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