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Method for drawing in limestone in vortex manner to remove carbon in copper-containing molten iron

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

Active Publication Date: 2017-01-11
NORTHEASTERN UNIV
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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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  • Method for drawing in limestone in vortex manner to remove carbon in copper-containing molten iron
  • Method for drawing in limestone in vortex manner to remove carbon in copper-containing molten iron
  • Method for drawing in limestone in vortex manner to remove carbon in copper-containing molten iron

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The specific composition of the copper-containing molten iron used in this example is shown in Table 1.

[0047] Table 1 Contents of each element in copper-containing hot metal (mass fraction, %)

[0048]

[0049] The structural schematic diagram of the induction furnace system adopted in this embodiment is shown in figure 1 .

[0050] A method for removing carbon from copper-containing hot metal by eddy currents involving limestone, comprising the following steps:

[0051] (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%;

[0052] (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

[0058] The specific composition of the copper-containing molten iron used in this example is shown in Table 2.

[0059] Table 2 Contents of each element in copper-containing molten iron (mass fraction, %)

[0060]

[0061] The structural schematic diagram of the induction furnace system adopted in this embodiment is shown in figure 1 .

[0062] A method for removing carbon from copper-containing hot metal by eddy currents involving limestone, comprising the following steps:

[0063] (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%;

[0064] (2) Adjust the stirring paddle 3 to be inserted to 1 / 3 of the height of the li...

Embodiment 3

[0070] The specific composition of the copper-containing molten iron used in this example is shown in Table 3.

[0071] Table 3 Contents of each element in copper-containing hot metal (mass fraction, %)

[0072]

[0073] The structural schematic diagram of the induction furnace system adopted in this embodiment is shown in figure 1 .

[0074] A method for removing carbon from copper-containing hot metal by eddy currents involving limestone, comprising the following steps:

[0075] (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%;

[0076] (2) Adjust the stirring paddle 3 to be inserted to 1 / 2 of the height of the coppe...

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Abstract

The invention discloses a method for drawing in limestone in a vortex manner to remove carbon in copper-containing molten iron and belongs to the technical field of metallurgy. The method includes the specific steps that firstly, the copper-containing molten iron obtained by adding a carbonaceous reducing agent into copper slag for reduction is led into an induction furnace, and it is guaranteed that the temperature of the copper-containing molten iron is higher than or equal to 1450 DEG C; secondly, center stirring is performed on the copper-containing molten iron, and vortexes with the height-diameter ratio ranging from 0.5 to 2.5 are formed; thirdly, limestone powder is sprayed into the centers of the vortexes, center stirring continues, eccentric stirring is performed after the limestone powder is sprayed in, and generated CO2 is made to be more fully mixed with the vortexes; fourthly, the limestone powder is directly drawn in the molten iron by the vortexes to fully react with the molten iron, and decarbonized copper-containing molten iron and molten slag are obtained; and fifthly, the decarbonized copper-containing molten iron and the molten slag are discharged in a layered manner. The method is simple in process, small in investment, capable of saving energy and protecting the environment and low in cost, has high economic value, and not only can the decarbonization purpose be achieved, but also the copper element in the copper-containing molten iron can be protected against burning losses.

Description

[0001] Technical field: [0002] 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. [0003] Background technique: [0004] 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...

Claims

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Application Information

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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
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