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A method for removing carbon from copper-containing iron water by eddy current entanglement in limestone

A technology of limestone and molten iron, applied in the field of metallurgy, to achieve the effect of rapid and thorough reaction, low cost and simple process

Active Publication Date: 2019-04-26
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent with application number 201610144809.0 proposes a method of stirring and involving pulverized coal to reduce copper slag, stirring to form a vortex, which has a very good reduction effect, but does not involve the field of decarburization

Method used

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  • A method for removing carbon from copper-containing iron water by eddy current entanglement in limestone
  • A method for removing carbon from copper-containing iron water by eddy current entanglement in limestone
  • A method for removing carbon from copper-containing iron water by eddy current entanglement in limestone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The specific composition of the copper-containing molten iron used in this example is shown in Table 1.

[0042] Table 1 Contents of each element in copper-containing hot metal (mass fraction, %)

[0043]

[0044] The structural schematic diagram of the induction furnace system adopted in this embodiment is shown in figure 1 .

[0045] A method for removing carbon from copper-containing hot metal by eddy currents involving limestone, comprising the following steps:

[0046] (1) After taking copper slag and adding a carbonaceous reducing agent, the copper-containing molten iron obtained by reduction has a temperature of 1450°C and a mass of 20t. It is added to an induction furnace, and the temperature of the copper-containing molten iron is controlled to be 1450°C. The mass percentage of C is 2.0%, and the mass percentage of Cu is 4.68%;

[0047] (2) Adjust the stirring paddle 3 to be inserted to 1 / 3 of the height of the liquid level of the copper-containing molten...

Embodiment 2

[0053] The specific composition of the copper-containing molten iron used in this example is shown in Table 2.

[0054] Table 2 Contents of each element in copper-containing molten iron (mass fraction, %)

[0055]

[0056] The structural schematic diagram of the induction furnace system adopted in this embodiment is shown in figure 1 .

[0057] A method for removing carbon from copper-containing hot metal by eddy currents involving limestone, comprising the following steps:

[0058] (1) After taking copper slag and adding a carbonaceous reducing agent, the copper-containing molten iron obtained by reduction has a temperature of 1500°C and a mass of 20t. It is added to an induction furnace, and the temperature of the copper-containing molten iron is controlled at 1500°C. The copper-containing molten iron contains The mass percentage of C is 3.2%, and the mass percentage of Cu is 5.06%;

[0059] (2) Adjust the stirring paddle 3 to be inserted to 1 / 3 of the height of the li...

Embodiment 3

[0065] The specific composition of the copper-containing molten iron used in this example is shown in Table 3.

[0066] Table 3 Contents of each element in copper-containing hot metal (mass fraction, %)

[0067]

[0068] The structural schematic diagram of the induction furnace system adopted in this embodiment is shown in figure 1 .

[0069] A method for removing carbon from copper-containing hot metal by eddy currents involving limestone, comprising the following steps:

[0070] (1) After taking copper slag and adding carbonaceous reducing agent, the copper-containing molten iron obtained by reduction has a temperature of 1550°C and a mass of 30t. It is added to the induction furnace, and the temperature of the copper-containing molten iron is controlled at 1550°C. The copper-containing molten iron contains The mass percentage of C is 4.5%, and the mass percentage of Cu is 5.24%;

[0071] (2) Adjust the stirring paddle 3 to be inserted to 1 / 2 of the height of the coppe...

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Abstract

A method of removing carbon in a copper-containing molten iron by using a vortex to draw in limestone. The method belongs to the technical field of metallurgy, and comprises the specific steps of: (1) feeding copper-containing molten iron, obtained by adding a carbonaceous reducing agent into copper slag for reduction, and ensuring that the temperature is ≥1450°C, into an induction furnace; (2) centrally stirring the copper-containing molten iron to form a vortex with a height-diameter ratio of 0.5 to 2.5; (3) spraying limestone powder into the center of the vortex while the central stirring continues, and performing eccentric stirring after the limestone powder has been sprayed so as to allow more homogeneous mixing of generated CO2 in the vortex; (4) enabling the limestone powder to be directly drawn into the molten iron by the vortex to fully react with the molten iron and to obtain decarbonized copper-containing molten iron and molten slag; and (5) discharging the decarbonized copper-containing molten iron and the molten slag in different layers. The method is simple, requires little investment, is capable of saving energy and protecting the environment and is low in cost, has high economic value, achieves decarbonization, and protects a copper element in the copper-containing molten iron against loss through burning.

Description

Technical field: [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a method for removing carbon from copper-containing iron water by eddy currents being involved in limestone. Background technique: [0002] Every ton of copper produced will produce 2.2 tons of copper slag. With the rapid development of copper smelting technology, the stock of copper slag has also greatly increased. Copper slag contains a large number of valuable metal elements, but the current utilization of copper slag is still focused on the extraction of copper and iron alone, and the simultaneous utilization of copper and iron elements is limited to copper-iron alloys. The extraction of copper and iron elements mostly uses carbonaceous reducing agents to reduce oxides and sulfides in copper slag. In order to ensure the reduction effect, carbonaceous reducing agents are mostly added in excess, which makes the obtained copper-iron alloy contain a large amount o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/068
CPCC21C7/068
Inventor 张廷安豆志河张保敬张子木刘燕牛丽萍王东兴吕国志
Owner NORTHEASTERN UNIV LIAONING
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