Method for removing carbon in high-carbon copper-containing molten iron through injection of carbon dioxide

Abstract

The invention provides a method for removing carbon in high-carbon copper-containing molten iron through injection of carbon dioxide and belongs to the field of metallurgy. The method comprises the following steps that firstly, the high-carbon copper-containing molten iron is guided into an induction furnace; secondly, carbon dioxide gas is injected into the high-carbon copper-containing molten iron, and stirring is conducted; thirdly, when the mass percent of the carbon in the high-carbon copper-containing molten iron is smaller than or equal to 0.2%, injection is stopped; and fourthly, carbon monoxide is post-processed to generate carbon dioxide, the carbon dioxide is recycled, and the copper-containing molten iron is separated from slag. According to the method, the injected carbon dioxide reacts with the carbon in the melt to generate carbon monoxide, after escaping, the carbon monoxide is combusted to regenerate the carbon dioxide, and the carbon dioxide returns to be used; and besides, the carbon dioxide is a weak-oxidation gas and cannot react with copper, and the carbon dioxide further has the dephosphorizing function and the desiliconization function. By the adoption of the method for removing the carbon in the high-carbon copper-containing molten iron through injection of the carbon dioxide, the technology is simple, a stirring system is additionally arranged in the induction furnace, energy is saved, environmental friendliness is achieved, the cost is low, the greenhouse gas is utilized, and therefore the high economic value and the good environmental protection function are achieved; and the purpose of removing the carbon is achieved, and the copper element in the high-carbon copper-containing molten iron can be protected against the burning loss.

Description

technical field

[0001] The invention belongs to the field of metallurgy, in particular to a CO injection 2 A method for removing carbon from high-carbon copper-containing iron water. Background technique

[0002] With the rapid development of copper smelting technology, the production of blister copper in my country has increased rapidly. At the same time, the stockpiling of copper slag has also increased greatly. As of 2015, the stockpiling of copper slag in my country has reached more than 270 million tons. The storage of such a large amount of waste not only occupies a large amount of land and pollutes the environment, but also contains a large amount of valuable metal elements in the copper slag, and the copper and iron content is higher than the grade of the ore. The waste of copper slag is also a waste of resources.

[0003] At present, the utilization of copper slag is still focused on extracting copper and iron separately, and the recovery value is limited. The sim...

Examples

Embodiment 1

[0037] The high-carbon copper-containing molten iron used in the embodiment of the present invention is shown in Table 1 for the analysis results of elements in the high-carbon copper-containing molten iron.

[0038] The structural schematic diagram of the induction furnace system adopted in this embodiment is shown in figure 1 .

[0039] A blown CO 2 The method for removing carbon from high-carbon copper-containing molten iron comprises the following steps:

[0040] (1) 20t reduced molten high-carbon copper-containing molten iron is introduced from the launder figure 1 In the induction furnace shown, the temperature of the high-carbon copper-containing molten iron is 1500°C by heating the induction furnace;

[0041] (2) Insert the stirring paddle 7 to 1 / 3 of the height of the liquid level of the copper-containing molten iron through the stirring paddle lifting system, and carry out eccentric stirring, wherein the eccentricity is 0.1, and the stirring speed is 50r / min; mean...

Embodiment 2

[0047] The high-carbon copper-containing molten iron used in the embodiment of the present invention is shown in Table 1 for the analysis results of elements in the high-carbon copper-containing molten iron.

[0048] The structural schematic diagram of the induction furnace system adopted in this embodiment is shown in figure 2 .

[0049] A blown CO 2 The method for removing carbon from high-carbon copper-containing molten iron comprises the following steps:

[0050] (1) 30t reduced molten high-carbon copper-containing molten iron is introduced from the launder figure 2 In the induction furnace shown, the temperature of the high-carbon copper-containing molten iron is 1500°C by heating the induction furnace;

[0051] (2) Insert the stirring paddle 7 into the 1 / 2 place of the liquid level height of the copper-containing molten iron through the stirring paddle lifting system, and carry out eccentric stirring, wherein the eccentricity is 0.4, and the stirring speed is 100r / m...

Embodiment 3

[0056] The high-carbon copper-containing molten iron used in the embodiment of the present invention is shown in Table 1 for the analysis results of elements in the high-carbon copper-containing molten iron.

[0057] The structural schematic diagram of the induction furnace system adopted in this embodiment is shown in figure 2 .

[0058] A blown CO 2 The method for removing carbon from high-carbon copper-containing molten iron comprises the following steps:

[0059] (1) 30t reduced molten high-carbon copper-containing molten iron is introduced from the launder figure 2 In the induction furnace shown, the temperature of the high-carbon copper-containing molten iron is 1450°C through induction furnace heating;

[0060] (2) Insert the stirring paddle 7 to the 1 / 2 place of the liquid level height of the copper-containing molten iron through the stirring paddle lifting system, and carry out eccentric stirring, wherein, the eccentricity is 0.5, and the stirring speed is 100r / m...

technical field

[0001] The invention belongs to the field of metallurgy, in particular to a CO injection 2 A method for removing carbon from high-carbon copper-containing iron water. Background technique

[0002] With the rapid development of copper smelting technology, the production of blister copper in my country has increased rapidly. At the same time, the stockpiling of copper slag has also increased greatly. As of 2015, the stockpiling of copper slag in my country has reached more than 270 million tons. The storage of such a large amount of waste not only occupies a large amount of land and pollutes the environment, but also contains a large amount of valuable metal elements in the copper slag, and the copper and iron content is higher than the grade of the ore. The waste of copper slag is also a waste of resources.

[0003] At present, the utilization of copper slag is still focused on extracting copper and iron separately, and the recovery value is limited. The sim...

Examples

Embodiment 1

[0037] The high-carbon copper-containing molten iron used in the embodiment of the present invention is shown in Table 1 for the analysis results of elements in the high-carbon copper-containing molten iron.

[0038] The structural schematic diagram of the induction furnace system adopted in this embodiment is shown in figure 1 .

[0039] A blown CO 2 The method for removing carbon from high-carbon copper-containing molten iron comprises the following steps:

[0040] (1) 20t reduced molten high-carbon copper-containing molten iron is introduced from the launder figure 1 In the induction furnace shown, the temperature of the high-carbon copper-containing molten iron is 1500°C by heating the induction furnace;

[0041] (2) Insert the stirring paddle 7 to 1 / 3 of the height of the liquid level of the copper-containing molten iron through the stirring paddle lifting system, and carry out eccentric stirring, wherein the eccentricity is 0.1, and the stirring speed is 50r / min; mean...

Embodiment 2

[0047] The high-carbon copper-containing molten iron used in the embodiment of the present invention is shown in Table 1 for the analysis results of elements in the high-carbon copper-containing molten iron.

[0048] The structural schematic diagram of the induction furnace system adopted in this embodiment is shown in figure 2 .

[0049] A blown CO 2 The method for removing carbon from high-carbon copper-containing molten iron comprises the following steps:

[0050] (1) 30t reduced molten high-carbon copper-containing molten iron is introduced from the launder figure 2 In the induction furnace shown, the temperature of the high-carbon copper-containing molten iron is 1500°C by heating the induction furnace;

[0051] (2) Insert the stirring paddle 7 into the 1 / 2 place of the liquid level height of the copper-containing molten iron through the stirring paddle lifting system, and carry out eccentric stirring, wherein the eccentricity is 0.4, and the stirring speed is 100r / m...

Embodiment 3

[0056] The high-carbon copper-containing molten iron used in the embodiment of the present invention is shown in Table 1 for the analysis results of elements in the high-carbon copper-containing molten iron.

[0057] The structural schematic diagram of the induction furnace system adopted in this embodiment is shown in figure 2 .

[0058] A blown CO 2 The method for removing carbon from high-carbon copper-containing molten iron comprises the following steps:

[0059] (1) 30t reduced molten high-carbon copper-containing molten iron is introduced from the launder figure 2 In the induction furnace shown, the temperature of the high-carbon copper-containing molten iron is 1450°C through induction furnace heating;

[0060] (2) Insert the stirring paddle 7 to the 1 / 2 place of the liquid level height of the copper-containing molten iron through the stirring paddle lifting system, and carry out eccentric stirring, wherein, the eccentricity is 0.5, and the stirring speed is 100r / m...

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