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Low-carbon comprehensive utilization method of copper slag after smelting reduction

A low-carbon, copper slag technology, applied in the fields of resources and environment, to achieve good effect and promote the effect of conversion rate

Active Publication Date: 2014-01-29
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Achieving these two goals is indispensable to realize the commercial operation of copper slag recycling process, but there is a certain contradiction between the two goals

Method used

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  • Low-carbon comprehensive utilization method of copper slag after smelting reduction

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Effect test

Embodiment 1

[0027] like figure 1 As shown, the low-carbon comprehensive utilization method after the copper slag smelting reduction, its specific steps are as follows:

[0028] (1) Copper slag smelting reduction method: First, mix copper slag, flux and carbonaceous reducing agent evenly to obtain a mixed material, in which the mass ratio of copper slag to flux is 100:45, and then spray it into a combustible gas with a blowing pressure of 50kPa Replenish the heat source, heat the mixed material to a temperature of 1500°C and fully melt it, and then pass a gas with a blowing pressure of 30kPa for oxidative desulfurization for 10 minutes, then stop the gas supply, and let the molten mixed material go through a reduction reaction for 30 minutes. After the reaction is completed, the obtained Coarse metal raw materials and residues will also produce high-temperature flue gas during this process. The copper slag is the hot slag in the copper smelting process. The copper slag includes the followi...

Embodiment 2

[0038] like figure 1 As shown, the low-carbon comprehensive utilization method after the copper slag smelting reduction, its specific steps are as follows:

[0039] (1) Copper slag smelting reduction method: First, mix copper slag, flux and carbonaceous reducing agent evenly to obtain a mixed material, in which the mass ratio of copper slag to flux is 100:70, and then spray it into a combustible gas with a blowing pressure of 250kPa Replenish the heat source, heat the mixed material to a temperature of 1600°C and fully melt it, and then inject gas with a blowing pressure of 300kPa for oxidative desulfurization for 30 minutes. Coarse metal raw materials and residues will also produce high-temperature flue gas during this process, of which copper slag is water-quenched slag in the copper smelting process, and copper slag includes the following components in mass percentage: FeO55%, Fe 3 o 4 3%, SiO 2 38%, CaO3%, Al 2 o 3 1%, the flux is dolomite, the amount of carbonaceous ...

Embodiment 3

[0049] like figure 1 As shown, the low-carbon comprehensive utilization method after the copper slag smelting reduction, its specific steps are as follows:

[0050] (1) Copper slag smelting reduction method: First, mix copper slag, flux and carbonaceous reducing agent evenly to obtain a mixed material, in which the mass ratio of copper slag to flux is 100:50, and then spray it into a combustible gas with a blowing pressure of 100kPa Replenish the heat source, heat the mixed material to a temperature of 1550°C and fully melt it, and then inject gas with a blowing pressure of 280kPa for oxidative desulfurization for 20 minutes. Coarse metal raw materials and residues will also produce high-temperature flue gas during this process, of which copper slag is hot slag in the copper smelting process, and copper slag includes the following components in mass percentage: FeO40%, Fe 3 o 4 9%, SiO 2 30%, CaO2%, Al 2 o 3 6%, the flux is dolomite, the amount of carbonaceous reducing ag...

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Abstract

The invention relates to a low-carbon comprehensive utilization method of copper slag after smelting reduction, belonging to the technical field of resources and environment. After a smelting reduction process of copper slag, crude metal raw materials and residues are obtained, and in the smelting reduction process, high-temperature flue gas can be also generated. A residue utilization method comprises the steps of cooling and solidifying the residues by water, mechanically grinding and crushing, adding the crushed residues and biomass powder to a fluidized-state biomass gasifier, and carrying out a gasification reaction under a condition of spraying a gasifying agent, wherein in the gasification reaction process, flammable gases and residues can be generated, and the residues are used as raw materials in constructional engineering. A high-temperature flue gas utilization method comprises the steps of carrying out secondary combustion on the high-temperature flue gas, cooling by waste heat utilization, and then introducing into a biomass pyrolysis and carbonization process as an external heat source, wherein pyrolysis gas, flue gas and biomass charcoal are obtained in the biomass pyrolysis and carbonization process, and the flue gas is discharged after being purified. According to the low-carbon comprehensive utilization method, the technical method of preparing flammable gas and biomass charcoal by pyrolyzing and gasifying biomass by means of waste heat of copper slag and coupling with a smelting reduction process of copper slag is a novel low-carbon metallurgical technology.

Description

technical field [0001] The invention relates to a low-carbon comprehensive utilization method of copper slag after smelting and reduction, and belongs to the technical field of resources and environment. Background technique [0002] Resources are the material basis for the survival and development of human beings. With the long-term mining of mineral resources, the primary resources are gradually scarce. The development and utilization of secondary resources is an important way for the metallurgical industry to achieve sustainable development. "Comprehensive Utilization of Mineral Resources" has been listed as a priority theme in the "National Medium and Long-Term Science and Technology Development Plan (2006-2020)". At present, my country's copper production ranks first in the world, and the developed and utilized copper resources account for 67.1% of the country's total proven resource reserves. In order to meet the demand for smelting capacity, the mining grade has dropp...

Claims

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Application Information

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IPC IPC(8): B09B3/00C22B7/04C22B5/10
Inventor 王华胡建杭刘慧利李磊魏永刚
Owner KUNMING UNIV OF SCI & TECH
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