CN112981134A - Continuous copper smelting process and continuous copper smelting system - Google Patents

Continuous copper smelting process and continuous copper smelting system Download PDF

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Publication number
CN112981134A
CN112981134A CN202110434569.9A CN202110434569A CN112981134A CN 112981134 A CN112981134 A CN 112981134A CN 202110434569 A CN202110434569 A CN 202110434569A CN 112981134 A CN112981134 A CN 112981134A
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China
Prior art keywords
smelting
copper
slag
converting
layer
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CN202110434569.9A
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Chinese (zh)
Inventor
颜杰
张海鑫
李建辉
郭亚光
吴金财
梁帅表
郝小红
李晓霞
崔大韡
吴玲
李海春
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China ENFI Engineering Corp
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China ENFI Engineering Corp
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Priority to CN202110434569.9A priority Critical patent/CN112981134A/en
Publication of CN112981134A publication Critical patent/CN112981134A/en
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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B15/00Obtaining copper
    • C22B15/0026Pyrometallurgy
    • C22B15/0028Smelting or converting
    • C22B15/005Smelting or converting in a succession of furnaces

Abstract

The invention discloses a continuous copper smelting process and a continuous copper smelting system. The continuous copper smelting process comprises the following steps: carrying out side-blown smelting on the copper-containing raw material so as to obtain a copper matte layer and a smelting slag layer, providing first oxygen-enriched gas for the smelting slag layer, wherein the thickness of the copper matte layer is 800-1400 mm, the thickness of the smelting slag layer is 1300-1800 mm, and discharging copper matte and smelting slag; the method comprises the steps of carrying out top blowing on copper matte to obtain a crude copper layer and a blown slag layer, providing second oxygen-enriched gas to the blown slag layer by using a blowing spray gun, wherein the second oxygen-enriched gas forms a vortex, an outlet of the blowing spray gun is positioned above the blown slag layer, the thickness of the blown slag layer is 50-300 mm, blowing slag in the blown slag layer is discharged, and crude copper in the crude copper layer is continuously discharged; and oxidizing and reducing the blister copper in sequence to obtain anode copper and refining slag. The continuous copper smelting process has the advantages of high production efficiency, low operation cost, low energy consumption and high oxygen utilization rate.

Description

Continuous copper smelting process and continuous copper smelting system
Technical Field
The invention relates to the field of metallurgy, in particular to a continuous copper smelting process and a continuous copper smelting system.
Background
At present, the copper smelting technology develops towards the direction of strengthening, high efficiency, environmental protection and comprehensive recovery, and domestic and foreign copper smelting enterprises and practitioners strive to develop a novel copper smelting technology which is more efficient, low in investment and operation cost, environment-friendly, high in yield and continuous in smelting. At present, modern intensified smelting processes such as bottom blowing copper smelting, side blowing smelting, top blowing smelting, flash smelting and the like are commonly adopted in domestic and foreign copper smelting processes; the blowing adopts bottom blowing, top blowing, flash blowing, converter blowing and the like, and particularly, the converter blowing is gradually replaced by other advanced blowing processes due to the problems of low air pollution, high labor intensity, short service life of a spray gun, dangerousness of a ladle and the like caused by intermittent operation of the converter blowing.
With the development of industrial technology, the modern unit technologies of strengthening molten pool smelting, continuous converting and the like gradually replace the original backward smelting technology in the copper smelting process. With the rapid development of the unit technology, the continuous copper smelting technology is gradually developed and makes certain progress, the continuous smelting process is realized, and various problems in discontinuous smelting are avoided.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the embodiment of the invention provides a continuous copper smelting process and a continuous copper smelting system.
The continuous copper smelting process provided by the embodiment of the invention comprises the following steps:
performing side-blown smelting on a copper-containing raw material and a first fusing agent so as to obtain a copper matte layer and a smelting slag layer, supplying a first oxygen-enriched gas to the smelting slag layer by using a smelting spray gun during the side-blown smelting, wherein the thickness of the copper matte layer is 800-1400 mm, the thickness of the smelting slag layer is 1300-1800 mm, discharging the smelting slag in the smelting slag layer, and continuously discharging the copper matte in the copper matte layer;
top-blowing the copper matte and the second flux to obtain a crude copper layer and an converting slag layer, providing a second oxygen-enriched gas to the converting slag layer by using a converting spray gun during the top-blowing converting, wherein the second oxygen-enriched gas forms a vortex to stir the converting slag layer, an outlet of the converting spray gun is positioned above the converting slag layer, the thickness of the converting slag layer is 50-300 mm, converting slag in the converting slag layer is discharged, and crude copper in the crude copper layer is continuously discharged; and
and sequentially oxidizing and reducing the blister copper so as to obtain anode copper and refining slag.
The continuous copper smelting process provided by the embodiment of the invention has the advantages of high production efficiency, low copper content of the smelting slag layer, low operation cost, no solidification of copper matte, low coal consumption, low elemental sulfur content in flue gas, low energy consumption, high oxygen utilization rate and low copper content of the converting slag layer.
Optionally, the thickness of the copper matte layer is 900 mm to 1200 mm, the thickness of the smelting slag layer is 1400 mm to 1700 mm, optionally, the thickness of the copper matte layer is 1000mm to 1100 mm, and the thickness of the smelting slag layer is 1500 mm to 1600 mm.
Optionally, the first oxygen-enriched gas with the oxygen concentration of 75% -99% is provided to the smelting slag layer when the side-blown smelting is carried out, optionally, the first oxygen-enriched gas with the oxygen concentration of 80% -99% is provided to the smelting slag layer when the side-blown smelting is carried out, optionally, a third oxygen-enriched gas is injected to the flue gas generated by the side-blown smelting so as to combust the flue gas, optionally, the third oxygen-enriched gas has the oxygen concentration of 20% -35%, optionally, the third oxygen-enriched gas has the oxygen concentration of 25% -30%, optionally, the second oxygen-enriched gas has the oxygen concentration of 20% -60%, and optionally, the second oxygen-enriched gas has the oxygen concentration of 30% -50%.
Optionally, the copper content of the smelting slag is less than or equal to 0.9wt%, optionally, the copper matte in the copper matte layer is continuously discharged by siphoning, the smelting slag in the smelting slag layer is continuously discharged by siphoning, or the smelting slag in the smelting slag layer is intermittently discharged by overflowing, optionally, the copper content of the blister copper is greater than or equal to 98.5wt%, the sulfur content of the blister copper is less than or equal to 0.4wt%, optionally, the copper content of the blown slag is less than or equal to 14wt%, optionally, the blister copper in the blister copper layer is continuously discharged by siphoning, the blown slag in the blown slag layer is continuously discharged by siphoning, or the blown slag in the blown slag layer is intermittently discharged by overflowing.
Optionally, the distance between the outlet of the smelting lance and the lower surface of the smelting slag layer is L, the thickness of the smelting slag layer is H, and L/H is greater than or equal to 1/100 and less than or equal to 1/2, optionally, the distance between the outlet of the converting lance for providing the second oxygen-rich gas and the upper surface of the converting slag layer is 1 mm to 1000mm, and optionally, the distance between the outlet of the converting lance for providing the second oxygen-rich gas and the upper surface of the converting slag layer is 200 mm to 300 mm.
Optionally, the thickness of the converting slag layer is 100 mm to 200 mm, and optionally, the thickness of the coarse copper layer is 800 mm to 1000 mm.
Optionally, the copper-containing raw material comprises the cooled and crushed refining slag, the copper matte, the second fusing agent and the cooled and crushed refining slag are subjected to top blowing, optionally, the first fusing agent comprises at least one of quartz and quartz stone, the second fusing agent comprises limestone, alternatively, Fe/SiO2 of the smelting slag is more than or equal to 1.4 and less than or equal to 2.0, the Fe/CaO of the blowing slag is more than or equal to 2.3 and less than or equal to 2.6, optionally, the Fe/SiO2 of the smelting slag is more than or equal to 1.5 and less than or equal to 1.8, optionally, the temperature of the copper matte layer is greater than or equal to 1200 ℃ and less than or equal to 1250 ℃, the temperature of the smelting slag layer is greater than or equal to 1250 ℃ and less than or equal to 1300 ℃, optionally, the temperature of the coarse copper layer is 1220 ℃ or more and 1240 ℃ or less, and the temperature of the converting slag layer is 1260 ℃ or more and 1300 ℃ or less.
The continuous copper smelting system comprises the following components:
the side-blown smelting furnace is provided with a smelting cavity, a feeding hole communicated with the smelting cavity, a smelting spray gun port, a smelting slag outlet and a copper matte outlet, wherein the distance between the copper matte outlet and the bottom wall surface of the smelting cavity is 800-1400 mm, and the distance between the smelting slag outlet and the bottom wall surface of the smelting cavity is 2100-2600 mm;
the smelting spray gun is arranged at the opening of the smelting spray gun;
the top-blowing converting furnace is provided with a converting cavity, and a copper matte inlet, a converting spray gun opening, a converting slag outlet and a crude copper outlet which are communicated with the converting cavity, wherein the copper matte inlet is communicated with the copper matte outlet, the distance between the crude copper outlet and the bottom wall surface of the converting cavity is 600-1200 mm, and the distance between the converting slag outlet and the bottom wall surface of the converting cavity is 800-1600 mm;
the converting spray gun is arranged at the position of the converting spray gun opening; and
the anode furnace is provided with a crude copper inlet, and the crude copper inlet is communicated with the crude copper outlet.
The continuous copper smelting system provided by the embodiment of the invention has the advantages of high production efficiency, low copper content of the smelting slag layer, low operation cost, low construction cost, no solidification of copper matte, low coal consumption, low elemental sulfur content in flue gas, low energy consumption, high oxygen utilization rate and low copper content of the converting slag layer.
Optionally, the smelting chamber comprises a smelting zone for side-blown smelting, an electrothermal sedimentation zone for sedimentation of copper matte, and a transition zone between the smelting zone and the electrothermal sedimentation zone, the copper matte outlet is provided on a portion of the side-blown smelting furnace corresponding to the smelting zone, the smelting slag outlet is provided on a portion of the side-blown smelting furnace corresponding to the electrothermal sedimentation zone, electrodes are provided in the electrothermal sedimentation zone, wherein the bottom wall surface of the smelting chamber comprises a first portion corresponding to the smelting zone, a second portion corresponding to the electrothermal sedimentation zone, and a third portion corresponding to the transition zone, the second portion is located above the first portion, the difference in height between the second portion and the first portion is 600 mm-1000 mm, the third portion is obliquely provided, and the upper edge of the third portion is connected with the second portion, the lower edge of the third portion is connected to the first portion.
Optionally, the converting lance is rotatably mounted at the converting lance port, and a distance between the converting lance outlet and the bottom wall surface of the converting chamber is greater than 1600 mm.
Drawings
FIG. 1 is a flow chart of a continuous copper metallurgy process according to an embodiment of the present invention;
fig. 2 is a sectional view of a side-blown smelting furnace of the continuous copper smelting system according to an embodiment of the present invention;
fig. 3 is a sectional view of a side-blown smelting furnace of the continuous copper smelting system according to an embodiment of the present invention;
fig. 4 is a top view of a side-blown smelting furnace of the continuous copper smelting system according to an embodiment of the present invention;
FIG. 5 is a sectional view of a top blowing converter of the continuous copper metallurgy system according to an embodiment of the present invention;
FIG. 6 is a cross-sectional view taken along A-A of FIG. 5;
FIG. 7 is a cross-sectional view taken along line B-B of FIG. 5;
FIG. 8 is a cross-sectional view taken along the line C-C of FIG. 5;
FIG. 9 is a cross-sectional view taken along D-D of FIG. 5;
FIG. 10 is a flow chart of a continuous copper metallurgy process according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The invention provides a continuous copper smelting process. As shown in fig. 1 and 10, the continuous copper smelting process according to the embodiment of the invention comprises the following steps:
and carrying out side-blown smelting on the copper-containing raw material and the first fusing agent so as to obtain a copper matte layer and a smelting slag layer. It will be appreciated by those skilled in the art that the smelt slag layer is located above the copper matte layer.
The thickness of the copper matte layer is 800 mm-1400 mm, and the thickness of the smelting slag layer is 1300 mm-1800 mm. In the related art, the thickness of the molten slag layer is 900 mm to 1200 mm. The continuous copper smelting process according to the embodiment of the present invention increases the thickness of the slag layer compared to the related art. By enabling the thickness of the smelting slag layer to be 1300 mm-1800 mm, the flow rate (namely the air volume) of the first oxygen-enriched gas blown into the smelting slag layer can be increased under the condition of avoiding over-blowing, so that the treatment capacity of the side-blown smelting can be increased, and the production efficiency of the continuous copper smelting process is improved.
Optionally, the thickness of the layer of smelt slag is 1400 mm-1700 mm. By enabling the thickness of the smelting slag layer to be 1400-1700 mm, the flow of the first oxygen-enriched gas blown into the smelting slag layer can be further increased under the condition of avoiding over-blowing, so that the treatment capacity of the side-blown smelting can be further increased, and the production efficiency of the continuous copper smelting process can be further improved.
Optionally, the thickness of the layer of smelt slag is from 1500 mm to 1600 mm. The thickness of the smelting slag layer is 1500-1600 mm, so that the flow of the first oxygen-enriched gas blown into the smelting slag layer can be further increased under the condition of avoiding over-blowing, the treatment capacity of the side-blown smelting can be further increased, and the production efficiency of the continuous copper smelting process can be further improved.
Wherein, the copper content of the smelting slag layer in the related technology is 1.7wt%, and the copper content of the smelting slag layer is less than 0.9 wt%.
Optionally, the distance between the outlet of the smelting spray gun and the lower surface of the smelting slag layer is L, the thickness of the smelting slag layer is H, and L/H is greater than or equal to 1/100 and less than or equal to 1/2. In other words, the height of the outlet of the smelt lance is located at a position 1/100-1/2 of the height of the smelt slag layer from bottom to top.
In the related art, the thickness of the copper matte layer is 600 mm to 700 mm. The continuous copper smelting process according to the embodiment of the present invention increases the thickness of the copper matte layer, compared to the related art. The thickness of the copper matte layer is increased to 800 mm-1400 mm, so that the copper matte layer is prevented from being solidified under the condition that the furnace body of the side-blown smelting furnace is not thickened, the freezing and the dead combination of a furnace cylinder are avoided, and the construction cost of the side-blown smelting furnace is reduced.
Optionally, the thickness of the copper matte layer is 900 mm to 1200 mm. The thickness of the copper matte layer is increased to 900 mm-1200 mm, so that the copper matte layer is further prevented from being solidified under the condition that the furnace body of the side-blown smelting furnace is not thickened, the freezing and the dead combination of the furnace cylinder are further avoided, and the construction cost of the side-blown smelting furnace is reduced. In addition, the service life of the side-blown smelting furnace can be further prolonged.
Optionally, the thickness of the copper matte layer is 1000mm to 1100 mm. The thickness of the copper matte layer is increased to 1000 mm-1100 mm, so that under the condition that the furnace body of the side-blown smelting furnace is not thickened, the copper matte layer is further prevented from being solidified, the freezing and the dead combination of the furnace cylinder are further avoided, and the construction cost of the side-blown smelting furnace is reduced. In addition, the service life of the side-blown smelting furnace can be further prolonged.
And supplying first oxygen-enriched gas to the smelting slag layer by using a smelting spray gun when the side-blown smelting is carried out. By providing oxygen-enriched gas to the layer of molten slag, more oxygen can be provided to the layer of molten slag.
Therefore, the coal consumption of about 2wt% can be reduced (the coal blending amount is reduced from 3wt% to below 1wt% for preventing foaming slag generation) so as to reduce the cost of the continuous copper smelting process, and the content of elemental sulfur in the flue gas can be reduced. Furthermore, the adhesion between the flue boiler and the electric dust collecting device can be reduced, and the blocking of a plate frame filter of an acid making system is avoided. Moreover, the oxygen-enriched gas is provided for the smelting slag layer, so that the gas quantity can be reduced, the smoke gas quantity can be reduced, and the concentration of sulfur dioxide in the smoke gas can be improved. Therefore, the method not only can reduce the treatment capacity of the flue gas, but also can be more convenient for capturing the sulfur in the flue gas. Wherein the concentration of sulfur dioxide in the flue gas generated by the side-blown smelting is 32-50%.
Optionally, the first oxygen-enriched gas with an oxygen concentration of 75-99% is provided to the molten slag layer when the side-blown smelting is performed. Therefore, the coal consumption can be further reduced, so that the cost of the continuous copper smelting process is further reduced, and the content of elemental sulfur in the flue gas can be further reduced. Furthermore, the adhesion between the flue boiler and the electric dust collecting device can be further reduced, and the blockage of a plate frame filter of the acid making system can be further avoided. In addition, the treatment capacity of the flue gas can be further reduced, and the sulfur in the flue gas can be collected more conveniently.
Optionally, the first oxygen-enriched gas with oxygen concentration of 80% -99% is provided to the molten slag layer when the side-blown smelting is performed. Therefore, the coal consumption can be further reduced, so that the cost of the continuous copper smelting process is further reduced, and the content of elemental sulfur in the flue gas can be further reduced. Furthermore, the adhesion between the flue boiler and the electric dust collecting device can be further reduced, and the blockage of a plate frame filter of the acid making system can be further avoided. In addition, the treatment capacity of the flue gas can be further reduced, and the sulfur in the flue gas can be collected more conveniently.
Wherein the oxygen concentration of the first oxygen-enriched gas is the volume percentage of oxygen in the first oxygen-enriched gas to the volume of the first oxygen-enriched gas.
Optionally, the temperature of the copper matte layer is greater than or equal to 1200 ℃ and less than or equal to 1250 ℃, and the temperature of the smelting slag layer is greater than or equal to 1250 ℃ and less than or equal to 1280 ℃.
Optionally, a third oxygen-enriched gas is injected into the flue gas generated by the side-blown smelting so as to combust the flue gas. Thereby, the elemental sulfur in the flue gas can be oxidized, and the flue gas is prevented from containing the elemental sulfur. The oxygen concentration of the third oxygen-enriched gas is 21% -35%. Optionally, the oxygen concentration of the third oxygen-enriched gas is 25% -30%.
Wherein the oxygen concentration of the third oxygen-enriched gas is the volume percentage of oxygen in the third oxygen-enriched gas to the volume of the third oxygen-enriched gas.
And discharging the smelting slag in the smelting slag layer, and continuously discharging the copper matte in the copper matte layer. In the related art, the copper matte in the copper matte layer is intermittently discharged. Since the matte outlet for discharging the matte needs to be maintained after discharging 4000 to 6000 tons of matte, a plurality of matte outlets need to be provided so that the matte can be discharged when one or more of the matte outlets are maintained, thereby increasing the manufacturing difficulty and the manufacturing cost of the side-blown smelting furnace.
The copper matte in this application through continuous emission copper matte layer to need not to carry out the maintenance to copper matte export. Therefore, the treatment capacity of the side-blown smelting furnace can be increased, the production efficiency of the continuous copper smelting process is improved, and the manufacturing difficulty and the manufacturing cost of the side-blown smelting furnace can be reduced, so that the running cost of the continuous copper smelting process is reduced.
For example, the copper matte in the copper matte layer is continuously discharged by siphoning. Continuously discharging the smelting slag in the smelting slag layer through siphoning or intermittently discharging the smelting slag in the smelting slag layer through overflowing.
And carrying out top blowing on the copper matte and the second fusing agent so as to obtain a crude copper layer and a blown slag layer, and supplying second oxygen-enriched gas to the blown slag layer by using a blowing spray gun during the top blowing, wherein the second oxygen-enriched gas forms a vortex. The second oxygen-enriched gas forms vortex, so that the second oxygen-enriched gas (process air) can be uniform, and the second oxygen-enriched gas can be utilized to uniformly and fully stir the blown slag layer, thereby being beneficial to mass transfer and heat transfer of melt. In addition, by making the second oxygen-rich gas into a vortex, a vortex can also be formed around the converting lance for supplying the second oxygen-rich gas, thereby extending the service life of the converting lance.
The thickness of the converting slag layer is 50 mm-300 mm. In the related art, the thickness of the blown slag layer is 400 mm to 500 mm. Compared with the related art, the embodiment of the inventionThe continuous copper smelting process reduces the thickness of the converting slag layer. By reducing the thickness of the blown slag layer to 50 mm to 300 mm, the blast pressure (from 3.5 kg/cm) can be reduced3Reducing the concentration to 2.0-2.5 kg/cm3) In order to reduce energy consumption.
Furthermore, by reducing the thickness of the blown slag layer to 50 mm-300 mm, the second oxygen-enriched gas can be made to pass through the blown slag layer more easily so as to reach the blister copper layer. The second oxygen-enriched gas reaching the coarse copper layer reacts with the coarse copper to generate cuprous oxide, and the generated cuprous oxide and copper matte in the converting slag layer are subjected to interactive reaction so as to accelerate the reaction process and improve the utilization rate of oxygen from 92% to more than 99%.
By reducing the thickness of the blown slag layer, the second oxygen-rich gas can be made to sufficiently stir the blown slag layer. Therefore, the generated cuprous oxide can quickly react with the copper matte in the converting slag layer so as to generate copper and sulfur dioxide, and the copper is instantaneously precipitated in the blister copper layer, thereby effectively reducing the copper content of the converting slag layer. Wherein, the copper content of the converting slag layer in the related technology is 20wt% -35wt%, and the copper content of the converting slag layer is 10wt% -14 wt%.
However, if the thickness of the layer of the converting slag is less than 50 mm, it causes difficulty in discharging the converting slag, and coarse copper is carried out while discharging the converting slag, resulting in an increase in the copper content of the converting slag.
Optionally, the thickness of the blown slag layer is from 100 mm to 200 mm. Therefore, the method is more favorable for discharging the converting slag, and can further accelerate the reaction process, further improve the utilization rate of oxygen and more effectively reduce the copper content of the converting slag layer.
Optionally, the thickness of the coarse copper layer is 800 mm to 1000 mm. In the related art, the thickness of the coarse copper layer is 700 mm. The continuous copper metallurgy process according to the embodiment of the present invention increases the thickness of the blister copper layer compared to the related art. By increasing the thickness of the blister copper layer to 800 mm-1000 mm, the oxygen potential of the blister copper layer, i.e. the oxygen content of the blister copper layer, can be increased, so that the sulphur content of the blister copper layer can be reduced. Wherein the sulfur content of the crude copper layer in the related art is 0.7wt%, and the sulfur content of the crude copper layer of the present application is 0.4wt% or less.
Optionally, the temperature of the coarse copper layer is 1220 ℃ or more and 1240 ℃ or less, and the temperature of the blown slag layer is 1260 ℃ or more and 1300 ℃ or less.
Further, by supplying the second oxygen-rich gas to the blown slag layer, it is possible to realize autothermal smelting. And the second oxygen-enriched gas is provided for the converting slag layer, so that the gas quantity can be reduced, the smoke gas quantity can be reduced, and the concentration of sulfur dioxide in the smoke gas can be improved. Therefore, the method not only can reduce the treatment capacity of the flue gas, but also can be more convenient for capturing the sulfur in the flue gas. Wherein the concentration of sulfur dioxide in the flue gas generated by the top blowing is 25-40%.
Optionally, the oxygen concentration of the second oxygen-enriched gas is 20% -60%. Optionally, the oxygen concentration of the second oxygen-enriched gas is 30% -50%. Therefore, the treatment capacity of the flue gas can be further reduced, and the sulfur in the flue gas can be more conveniently trapped. Wherein the oxygen concentration of the second oxygen-enriched gas is a percentage of the volume of oxygen in the second oxygen-enriched gas to the volume of the second oxygen-enriched gas.
Optionally, the outlet of the converting lance for providing the second oxygen-enriched gas is located at a distance of from 1 mm to 1000mm from the upper surface of the layer of converting slag. Optionally, the outlet of the converting lance for providing the second oxygen-enriched gas is located at a distance of 200 mm to 300 mm from the upper surface of the layer of converting slag.
Discharging the converting slag in the converting slag layer, and continuously discharging the blister copper in the blister copper layer. In the related art, the coarse copper in the coarse copper layer is intermittently drained. Since the blister copper outlet for discharging blister copper needs to be maintained after discharging blister copper of 4000 to 6000 tons, a plurality of blister copper outlets need to be provided so that blister copper can be discharged when one or more of the blister copper outlets is maintained, thereby increasing the manufacturing difficulty and the manufacturing cost of the top-blown converting furnace.
This application is through the blister copper in this blister copper layer of continuous emission to need not to maintain the blister copper export. Therefore, the processing capacity of the top blowing converting can be increased, the production efficiency of the continuous copper smelting process is improved, the manufacturing difficulty and the manufacturing cost of the top blowing converting furnace can be reduced, and the running cost of the continuous copper smelting process can be reduced.
The coarse copper in the coarse copper layer is continuously drained, for example, by siphoning. The converting slag in the converting slag layer is continuously discharged by siphoning or intermittently discharged by overflowing.
Optionally, the blister copper has a copper content of 98.5 wt.% or more and a sulfur content of 0.4 wt.% or less.
Alternatively, the converting slag can be discharged into a converting slag bag, cooled and crushed to return to the side-blown smelting furnace. The copper-bearing raw material may comprise a copper concentrate and the blown slag that is broken down by cooling. Optionally, the first flux includes at least one of quartz and quartz stone. Fe/SiO of the slag21.4 or more and 2.0 or less. Optionally, Fe/SiO of the slag21.5 to 1.8 inclusive.
The blister copper is oxidized and reduced in sequence to obtain anode copper and refining slag. Optionally, the anode copper flows into a casting machine through a chute to be cast into an anode plate, and the refined slag is discharged into a slag ladle and returns to a side-blown smelting furnace or a top-blown converting furnace after being cooled and crushed.
Optionally, top-blown converting the matte, the second fluxing agent and the cooled and crushed refining slag, the second fluxing agent comprising limestone. Alternatively, the blown slag may have Fe/CaO of 2.3 or more and 2.6 or less. In addition, secondary copper materials such as residual anode, waste anode plates, copper rice and the like can be processed in a matching way during the top blowing converting.
A continuous copper smelting system according to an embodiment of the present invention will be described with reference to the accompanying drawings. As shown in fig. 2 to 9, the continuous copper smelting system according to the embodiment of the present invention includes a side-blown smelting furnace 10, a smelting lance 20, a top-blown converting furnace 30, a converting lance 40, and an anode furnace (not shown in the drawings).
The side-blown smelting furnace 10 has a smelting chamber 11, and a feed inlet 12, a smelting lance port, a smelting slag outlet 13 and a copper matte outlet 14 which are communicated with the smelting chamber 11. A smelt lance 20 is mounted at the smelt lance port. The distance between the copper matte outlet 14 and the bottom wall surface 111 of the smelting chamber 11 is 800 mm-1400 mm, so that the thickness of the copper matte layer is 800 mm-1400 mm. The distance between the smelting slag outlet 13 and the bottom wall surface 111 of the smelting chamber 11 is 2100 mm-2600 mm so that the thickness of the smelting slag layer is 1300-1800 mm.
The top-blown converting furnace 30 has a converting chamber 31 and a copper matte inlet, a converting lance port, a converting slag outlet and a blister copper outlet which are communicated with the converting chamber 31. A converting lance 40 is mounted at the converting lance port. The matte inlet is in communication with the matte outlet 14 so that the matte discharged from the side blow smelting furnace 10 enters the converting chamber 31. The distance between the blister copper outlet and the bottom wall surface 311 of the converting chamber 31 is 600 mm-1200 mm so that the thickness of the blister copper layer is 600 mm-1200 mm. The distance between the converting slag outlet and the bottom wall surface 311 of the converting chamber 31 is 800 mm to 1600 mm so that the thickness of the converting slag layer is 50 mm to 300 mm.
The anode furnace has a blister copper inlet communicating with the blister copper outlet for the blister copper discharged from the top blow converting furnace 30 to enter the anode furnace.
The continuous copper smelting system according to the embodiment of the invention can be used for implementing the continuous copper smelting process according to the embodiment of the invention.
As shown in fig. 2, the smelting chamber 11 includes a smelting zone 112 for carrying out side-blown smelting, an electro-thermal settler zone 113 for settling the matte, and a transition zone 114 between the smelting zone 112 and the electro-thermal settler zone 113. The matte outlet 14 is arranged in a part of the side-blown smelting furnace 10 corresponding to the smelting zone 112, and the slag outlet 13 is arranged in a part of the side-blown smelting furnace 10 corresponding to the electrothermal settling zone 113. That is, the wall surface of the smelting zone 112 is provided with a copper matte outlet 14, and the wall surface of the electric heating sedimentation zone 113 is provided with a smelting slag outlet 13. The electric heating sedimentation zone 113 is internally provided with an electrode 15.
The bottom wall surface 111 of the smelting chamber 11 includes a first portion 1111 corresponding to the smelting zone 112, a second portion 1112 corresponding to the electro-thermal settler zone 113 and a third portion 1113 corresponding to the transition zone 114. The second portion 1112 is located above the first portion 1111, and the height difference between the second portion 1112 and the first portion 1111 is 600 mm-1000 mm, that is, the second portion 1112 is 600 mm-1000 mm higher than the first portion 1111. The third portion 1113 is obliquely arranged, and the upper edge of the third portion 1113 is connected to the second portion 1112 and the lower edge of the third portion 1113 is connected to the first portion 1111.
By arranging the electric heating sedimentation zone 113, the smelting slag and the copper matte can be separated better and more fully, so that the copper content of the smelting slag is reduced. Furthermore, by having the second portion 1112 above the first portion 1111 and the third portion 1113 arranged obliquely, the flow of copper matte in the electro-thermal settler 113 to the smelting zone 112 and thus the discharge of copper matte is facilitated.
The feeding hole 12 is arranged above the smelting zone 112, the materials are subjected to reaction and preliminary slag-matte separation in the smelting zone 112, the whole slag-matte separation is performed in the electrothermal settling zone 113, the smelting slag outlet 13 is arranged at one end of the electrothermal settling zone 113, and the copper matte outlet 14 is arranged at one end of the smelting zone 112. The bottom of the side-blown smelting furnace 10 is arranged in a step shape, and the height of the part of the electric heating sedimentation zone 113 is 600-1000mm higher than that of the bottom of the smelting zone 112.
The flue 13 of the side-blown smelting furnace 10 is a refractory brick flue, i.e. the flue 13 of the side-blown smelting furnace 10 is made of refractory bricks. Thereby reducing smoke adhesion. Specifically, the height of the flue 13 of the side-blown smelting furnace 10 is 8-15 meters. Optionally, the height of the flue 13 of the side blown smelting furnace 10 is 10-12 meters. The high-temperature flue gas produced by the side-blown smelting enters a waste heat boiler through a flue 13 to recover waste heat, a specially designed copper water jacket water-cooling door frame structure is adopted for a flue 13 and a waste heat boiler interface, and the high-temperature flue gas is sent to acid making after being collected by a dust collector.
As shown in fig. 3, the side-blown smelting furnace 10 is further provided with a secondary air lance 50, and the secondary air lance 50 is located above the smelting lance 20. The number of the smelting lances 20 may be 1-80, and the number of the secondary air lances 50 may be 1-10. The secondary air spray guns 50 can be positioned at two sides of the side-blown smelting furnace 10, and the secondary air spray guns 50 spray oxygen-enriched air with the oxygen concentration of 25% -30% as secondary air.
Alternatively, converting lance 40 is rotatably mounted at the converting lance port. Can make converting spray gun 40 scaling loss even from this to can make converting spray gun 40 can provide even second oxygen-enriched gas, converting spray gun 40 can spout the wind uniformly promptly, and then can stir this converting slag layer more uniformly.
Alternatively, the outlet of the blow lance 40 is spaced from the bottom wall surface 311 of the blow chamber 31 by a distance greater than 1600 mm. The outlet of the converting lance 40 can thereby be located above the converting slag layer, so that the service life of the converting lance 40 can be extended.
The number of the blow lances 40 may be 1-12, and the blow lances 40 may be arranged in a single row or two or more rows along the length of the top blow converter 30.
The top of the top-blown converting furnace 30 may be provided with 1-3 feed ports for adding materials such as flux. The flue 32 of the top blow converting furnace 30 is a refractory brick flue, i.e. the flue 32 of the top blow converting furnace 30 is made of refractory bricks. Thereby reducing smoke adhesion. Specifically, the height of the flue 32 of the top-blowing converting furnace 30 is 6 m to 10 m. Alternatively, the flue 32 of the top blow converting furnace 30 has a copper water jacket.
As shown in fig. 5 to 7, the furnace body 33 of the top-blowing converting furnace 30 includes an elastic frame 331 and a furnace body 332. The furnace body 332 is provided on the elastic frame 331, the furnace body 332 has a furnace cover, and the blowing chamber 31 is formed in the furnace body 332. A plurality of converting lances 40 are mounted on the resilient framework 331 and extend downwardly through the lid into the converting chamber 31. The elastic frame 331 is used to support the furnace body 332, and can perform a damping and buffering function on the furnace body 332. The furnace body 332 may be rectangular.
Alternatively, as shown in FIGS. 3-5, the cross-sectional area of the converting chamber 31 is gradually reduced from the top to the bottom. For example, each side wall of the furnace body 33 is inclined outward from bottom to top. The top blowing converting furnace 30 can be designed to be cooled and fireproof for different parts, so that the service life of the top blowing converting furnace 30 is ensured, and the anode scrap and other cold copper materials can be flexibly added according to the heat balance requirement. For example, cooling designs of various structures may be made for the molten pool portion, the slag line portion, the furnace top, the flue, and the like, thereby further improving the safety of the top-blowing converting furnace 30 and further extending the service life of the top-blowing converting furnace 30.
The operation rate of the continuous copper smelting process and the continuous copper smelting system according to the embodiment of the invention is over 95 percent. According to the continuous copper smelting process and the continuous copper smelting system provided by the embodiment of the invention, the copper recovery rate is more than 99%, the sulfur recovery rate is more than 98.5%, the sulfur capture rate is more than 99.6, the gold recovery rate reaches 99%, and the silver recovery rate reaches 98%.
Example 1
100 million tons of copper concentrate are treated in one year, the copper concentrate contains 8 percent of water, 20.2 percent of copper, 31 percent of sulfur, 13.4g/t of gold and 170g/t of silver; years of work are 330 days. 1 side-blown smelting furnace 10, 1 top-blown converting furnace 30 and 2 anode furnaces are arranged.
The oxygen-enriched concentration of primary air in side-blown smelting is 85 percent, the oxygen-enriched concentration of secondary air is 28 percent, the iron-silicon ratio is 1.6, the smelting slag temperature is 1270 ℃, and the copper matte temperature is 1230 ℃; the smelting slag contains 0.8% of copper, 72% of copper matte grade and 35.58% of sulfur dioxide concentration in flue gas. The thickness of the copper matte layer is 900 mm, and the thickness of the smelting slag layer is 1600 mm.
The top blowing oxygen enrichment concentration of the blowing spray gun 40 is 38 percent, the iron-calcium ratio is 2.5, the blowing slag temperature is 1280 ℃, and the crude copper temperature is 1240 ℃; the copper content of the blowing slag is 14%, the concentration of sulfur dioxide in flue gas is 28.79%, the copper content of the crude copper is 98.9%, and the sulfur content is 0.3%. The thickness of the blown slag layer was 100 mm and the thickness of the coarse copper layer was 1000 mm.
The anode copper contains 99.4 percent of copper, 65.77g/t of gold and 810.2g/t of silver, the copper recovery rate is 98.85 percent, the gold recovery rate is 98.55 percent and the silver recovery rate is 97.19 percent.
Example 2
150 ten thousand tons of copper concentrate is treated in a year, and the copper concentrate contains 8 percent of water and 22 percent of copper; years of work are 330 days. 1 side-blown smelting furnace 10, 1 top-blown converting furnace 30 and 2 anode furnaces are arranged.
The oxygen-enriched concentration of primary air in side-blown smelting is 83 percent, the oxygen-enriched concentration of secondary air is 26 percent, the iron-silicon ratio is 1.5, the temperature of smelting slag is 1280 ℃, and the temperature of copper matte is 1240 ℃; the smelting slag contains 0.75% of copper, 73% of copper matte grade and 36.76% of sulfur dioxide concentration in flue gas. The thickness of the copper matte layer is 1200 mm, and the thickness of the smelting slag layer is 1500 mm.
The top blowing of the blowing spray gun 40 is to blow oxygen-enriched concentration of 34 percent and iron-calcium ratio of 2.5, the temperature of blowing slag is 1290 ℃ and the temperature of crude copper is 1246 ℃; the converting slag contains 12% of copper, 31.79% of sulfur dioxide concentration in flue gas, 99.1% of copper and 0.25% of sulfur. The thickness of the blown slag layer was 200 mm and the thickness of the coarse copper layer was 800 mm.
The copper content of the anode copper is 99.5 percent, and the copper recovery rate is 98.91 percent.
Example 3
180-thousand-ton copper concentrate is treated in one year, and the copper concentrate contains 8% of water and 23.4% of copper; years of work are 330 days. 1 side-blown smelting furnace 10, 1 top-blown converting furnace 30 and 2 anode furnaces are arranged.
The oxygen-enriched concentration of primary air of side-blown smelting is 90 percent, the oxygen-enriched concentration of secondary air is 29 percent, the iron-silicon ratio is 1.8, the temperature of smelting slag is 1260 ℃, and the temperature of copper matte is 1220 ℃; the smelting slag contains 0.86% of copper, 75% of copper matte and 39.2% of sulfur dioxide in flue gas. The thickness of the copper matte layer is 1100 mm, and the thickness of the smelting slag layer is 1550 mm.
The top blowing oxygen enrichment concentration of the blowing spray gun 40 is 42 percent, the iron-calcium ratio is 2.3, the blowing slag temperature is 1285 ℃, and the crude copper temperature is 1239 ℃; the converting slag contains 11% of copper, 33.5% of sulfur dioxide concentration in flue gas, 99.2% of copper and 0.38% of sulfur. The thickness of the blown slag layer was 150 mm and the thickness of the coarse copper layer was 900 mm. The anode copper contains 99.6 percent of copper and the recovery rate of the copper is 98.82 percent.
Example 4
100 million tons of copper concentrate are treated in one year, the copper concentrate contains 8 percent of water, 20.2 percent of copper, 31 percent of sulfur, 13.4g/t of gold and 170g/t of silver; years of work are 330 days. 1 side-blown smelting furnace 10, 1 top-blown converting furnace 30 and 2 anode furnaces are arranged.
The oxygen-enriched concentration of primary air in side-blown smelting is 85 percent, the oxygen-enriched concentration of secondary air is 28 percent, the iron-silicon ratio is 1.6, the smelting slag temperature is 1270 ℃, and the copper matte temperature is 1230 ℃; the smelting slag contains 0.9% of copper, 73% of copper matte and 38.5% of sulfur dioxide in flue gas. The thickness of the copper matte layer is 800 mm, and the thickness of the smelting slag layer is 1800 mm.
The top blowing oxygen enrichment concentration of the blowing spray gun 40 is 38 percent, the iron-calcium ratio is 2.5, the blowing slag temperature is 1280 ℃, and the crude copper temperature is 1240 ℃; the copper content of the blowing slag is 14 percent, the concentration of sulfur dioxide in the flue gas is 32 percent, the copper content of the crude copper is 99 percent, and the sulfur content is 0.4 percent. The thickness of the blown slag layer was 50 mm and the thickness of the coarse copper layer was 1000 mm.
The anode copper contains 99.3 percent of copper, 65.6g/t of gold and 595g/t of silver, the recovery rate of copper is 98.6 percent, the recovery rate of gold is 98 percent and the recovery rate of silver is 97 percent.
Example 5
100 million tons of copper concentrate are treated in one year, the copper concentrate contains 8 percent of water, 20.2 percent of copper, 31 percent of sulfur, 13.4g/t of gold and 170g/t of silver; years of work are 330 days. 1 side-blown smelting furnace 10, 1 top-blown converting furnace 30 and 2 anode furnaces are arranged.
The oxygen-enriched concentration of primary air in side-blown smelting is 85 percent, the oxygen-enriched concentration of secondary air is 28 percent, the iron-silicon ratio is 1.6, the smelting slag temperature is 1270 ℃, and the copper matte temperature is 1230 ℃; the smelting slag contains 0.95 percent of copper, 73 percent of copper matte and 37.5 percent of sulfur dioxide concentration in the flue gas. The thickness of the copper matte layer is 1400 mm, and the thickness of the smelting slag layer is 1300 mm.
The top blowing oxygen enrichment concentration of the blowing spray gun 40 is 38 percent, the iron-calcium ratio is 2.5, the blowing slag temperature is 1280 ℃, and the crude copper temperature is 1240 ℃; the converting slag contains 12% of copper, 33% of sulfur dioxide concentration in flue gas, 98.6% of copper and 0.42% of sulfur. The thickness of the blown slag layer was 300 mm and the thickness of the coarse copper layer was 850 mm.
The anode copper contains 99.2 percent of copper, 65g/t of gold and 592g/t of silver, the copper recovery rate is 98.5 percent, the gold recovery rate is 97.8 percent, and the silver recovery rate is 96.8 percent.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (29)

1. A continuous copper smelting process is characterized by comprising the following steps:
performing side-blown smelting on a copper-containing raw material and a first fusing agent so as to obtain a copper matte layer and a smelting slag layer, supplying a first oxygen-enriched gas to the smelting slag layer by using a smelting spray gun during the side-blown smelting, wherein the thickness of the copper matte layer is 800-1400 mm, the thickness of the smelting slag layer is 1300-1800 mm, discharging the smelting slag in the smelting slag layer, and continuously discharging the copper matte in the copper matte layer;
top-blowing the copper matte and the second flux to obtain a crude copper layer and an converting slag layer, providing a second oxygen-enriched gas to the converting slag layer by using a converting spray gun during the top-blowing converting, wherein the second oxygen-enriched gas forms a vortex to stir the converting slag layer, an outlet of the converting spray gun is positioned above the converting slag layer, the thickness of the converting slag layer is 50-300 mm, converting slag in the converting slag layer is discharged, and crude copper in the crude copper layer is continuously discharged; and
and sequentially oxidizing and reducing the blister copper so as to obtain anode copper and refining slag.
2. The continuous copper smelting process according to claim 1, wherein the thickness of the copper matte layer is 900 mm to 1200 mm, and the thickness of the slag layer is 1500 mm to 1600 mm.
3. The continuous copper smelting process according to claim 1, wherein the first oxygen-enriched gas with the oxygen concentration of 75-99% is supplied to the smelting slag layer when the side-blown smelting is performed.
4. The continuous copper smelting process according to claim 1, wherein the copper content of the smelting slag is 0.9wt% or less.
5. The continuous copper smelting process according to claim 1, wherein the distance between the outlet of the smelting lance and the lower surface of the molten slag layer is L, the thickness of the molten slag layer is H, and L/H is 1/100 or more and 1/2 or less.
6. The continuous copper smelting process according to claim 1, wherein the thickness of the converting slag layer is 100 mm-200 mm.
7. The continuous copper smelting process according to claim 1, wherein the copper-containing raw material includes cooling crushed refining slag, and the copper matte, the second flux and the cooling crushed refining slag are top blown.
8. The continuous copper smelting process according to claim 3, wherein the first oxygen-rich gas with the oxygen concentration of 80-99% is supplied to the smelting slag layer when the side-blown smelting is performed.
9. The continuous copper smelting process according to claim 1, wherein a third oxygen-rich gas is injected into the flue gas generated by the side-blown smelting so as to combust the flue gas.
10. The continuous copper metallurgy process according to claim 9, wherein the oxygen concentration of the third oxygen-rich gas is 20 to 35%.
11. The continuous copper metallurgy process according to claim 10, wherein the oxygen concentration of the third oxygen-rich gas is 25 to 30 percent.
12. The continuous copper smelting process according to claim 1, wherein the oxygen concentration of the second oxygen-enriched gas is 20-60%.
13. The continuous copper metallurgy process according to claim 12, wherein the oxygen concentration of the second oxygen-rich gas is 30 to 50%.
14. The continuous copper smelting process according to claim 1, wherein the copper matte in the copper matte layer is continuously discharged by siphoning, the molten slag in the molten slag layer is continuously discharged by siphoning, or the molten slag in the molten slag layer is intermittently discharged by overflowing.
15. The continuous copper smelting process according to claim 1, wherein the copper content of the blister copper is 98.5wt% or more, and the sulfur content of the blister copper is 0.4wt% or less.
16. The continuous copper smelting process according to claim 1, wherein the copper content of the blowing slag is 14wt% or less.
17. The continuous copper smelting process according to claim 1, wherein the coarse copper in the coarse copper layer is continuously discharged by siphoning, the blown slag in the blown slag layer is continuously discharged by siphoning or the blown slag in the blown slag layer is intermittently discharged by overflowing.
18. The continuous copper smelting process according to claim 1, wherein the outlet of the converting lance for supplying the second oxygen-enriched gas is located at a distance of 1 mm to 1000mm from the upper surface of the converting slag layer.
19. The continuous copper smelting process according to claim 18, wherein the outlet of the converting lance for providing the second oxygen-rich gas is located at a distance of 200 mm to 300 mm from the upper surface of the converting slag layer.
20. The continuous copper metallurgy process according to claim 1, wherein the thickness of the coarse copper layer is 800 mm to 1000 mm.
21. The continuous copper smelting process according to claim 1, wherein the first fluxing agent includes at least one of quartz and quartzite, and the second fluxing agent includes limestone.
22. The continuous copper smelting process of claim 21, wherein the smelting slag is Fe/SiO21.4 to 2.0 inclusive, and the blowing slag has an Fe/CaO content of 2.3 to 2.6 inclusive.
23. The continuous copper smelting process of claim 22, wherein the smelting slag is Fe/SiO21.5 to 1.8 inclusive.
24. The continuous copper smelting process according to claim 1, wherein the temperature of the copper matte layer is 1200 ℃ or higher and 1250 ℃ or lower, and the temperature of the molten slag layer is 1250 ℃ or higher and 1300 ℃ or lower.
25. The continuous copper smelting process according to claim 1, wherein the temperature of the coarse copper layer is 1220 ℃ or more and 1240 ℃ or less, and the temperature of the blown slag layer is 1260 ℃ or more and 1300 ℃ or less.
26. A continuous copper metallurgy system, comprising:
the side-blown smelting furnace is provided with a smelting cavity, a feeding hole communicated with the smelting cavity, a smelting spray gun port, a smelting slag outlet and a copper matte outlet, wherein the distance between the copper matte outlet and the bottom wall surface of the smelting cavity is 800-1400 mm, and the distance between the smelting slag outlet and the bottom wall surface of the smelting cavity is 2100-2600 mm;
the smelting spray gun is arranged at the opening of the smelting spray gun;
the top-blowing converting furnace is provided with a converting cavity, and a copper matte inlet, a converting spray gun opening, a converting slag outlet and a crude copper outlet which are communicated with the converting cavity, wherein the copper matte inlet is communicated with the copper matte outlet, the distance between the crude copper outlet and the bottom wall surface of the converting cavity is 600-1200 mm, and the distance between the converting slag outlet and the bottom wall surface of the converting cavity is 800-1600 mm;
the converting spray gun is arranged at the position of the converting spray gun opening; and
the anode furnace is provided with a crude copper inlet, and the crude copper inlet is communicated with the crude copper outlet.
27. The continuous copper smelting system of claim 26, wherein the smelting chamber includes a smelting zone for side-blown smelting, an electrothermal settling zone for settling copper matte, and a transition zone between the smelting zone and the electrothermal settling zone, the copper matte outlet is provided on a portion of the side-blown smelting furnace corresponding to the smelting zone, the smelting slag outlet is provided on a portion of the side-blown smelting furnace corresponding to the electrothermal settling zone, an electrode is provided in the electrothermal settling zone, wherein the bottom wall surface of the smelting chamber includes a first portion corresponding to the smelting zone, a second portion corresponding to the electrothermal settling zone, and a third portion corresponding to the transition zone, the second portion is located above the first portion, and a difference in height between the second portion and the first portion is 600 mm-1000 mm, the third portion is obliquely arranged, the upper edge of the third portion is connected with the second portion, and the lower edge of the third portion is connected with the first portion.
28. The continuous copper smelting system according to claim 26 or 27, wherein the converting lance is rotatably mounted at the converting lance outlet, and the distance between the converting lance outlet and the bottom wall surface of the converting chamber is greater than 1600 mm.
29. The continuous copper smelting system of claim 28, wherein the side-blown smelting furnace flue is a refractory brick flue and the top-blown converting furnace flue is a refractory brick flue.
CN202110434569.9A 2021-04-22 2021-04-22 Continuous copper smelting process and continuous copper smelting system Pending CN112981134A (en)

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