Continuous copper smelting process and continuous copper smelting system

Abstract

The present invention discloses a continuous copper smelting process and a continuous copper smelting system. The continuous copper smelting process comprises the following steps: side-blowing smelting of copper-containing raw materials to obtain a copper matte layer and a smelting slag layer, providing a first oxygen-rich gas to the smelting slag layer, the thickness of the copper matte layer is 800 mm-1400 mm, the thickness of the smelting slag layer is 1300 mm-1800 mm, and discharging copper matte and smelting slag; top-blowing copper matte to obtain a blister copper layer and a smelting slag layer, providing a second oxygen-rich gas to the smelting slag layer by a smelting lance, the second oxygen-rich gas forms a vortex, the outlet of the smelting lance is located above the smelting slag layer, the thickness of the smelting slag layer is 50 mm-300 mm, discharging slag in the smelting slag layer, and continuously discharging blister copper in the blister copper layer; and oxidizing and reducing blister copper in sequence to obtain anode copper and refined slag. The continuous copper smelting process has the advantages of high production efficiency, low operating cost, low energy consumption, and high oxygen utilization rate.

Description

Technical Field

[0001] The invention relates to the field of metallurgy, in particular to a continuous copper smelting process and a continuous copper smelting system. Background Art

[0002] Today's copper smelting technology is developing in the direction of strengthening, high efficiency, green environmental protection, and comprehensive recycling. Domestic and foreign copper smelting companies and practitioners are committed to seeking to develop new copper smelting processes that are more efficient, low in investment and operating costs, green and environmentally friendly, high in production capacity, and continuous smelting. At present, domestic and foreign copper smelting processes generally adopt modern intensified smelting processes such as bottom blowing copper smelting, side blowing smelting, top blowing smelting, and flash smelting; bottom blowing, top blowing, flash blowing, converter blowing, etc. are used for blowing. In particular, converter blowing is gradually replaced by other advanced blowing processes due to the low-altitude pollution caused by its intermittent operation, high labor intensity, short life of the spray gun, and the danger of hanging bags.

[0003] With the development of industrial technology, modern unit technologies such as enhanced molten pool smelting and continuous blowing in the copper smelting process have gradually replaced the original backward smelting technology. With the rapid development of unit technology, continuous copper smelting technology has gradually developed and made certain progress, realizing the continuous smelting process and avoiding various problems existing in intermittent smelting. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present invention provides a continuous copper smelting process and a continuous copper smelting system.

[0005] The continuous copper smelting process according to an embodiment of the present invention comprises the following steps:

[0006] Performing side-blowing smelting on the copper-containing raw material and the first flux to obtain a copper matte layer and a smelting slag layer, providing a first oxygen-rich gas to the smelting slag layer by using a smelting lance during the side-blowing smelting, wherein the copper matte layer has a thickness of 800 mm to 1400 mm, and the smelting slag layer has a thickness of 1300 mm to 1800 mm, discharging the smelting slag in the smelting slag layer, and continuously discharging the copper matte in the copper matte layer;

[0007] The copper matte and the second flux are top-blown to obtain a blister copper layer and a blowing slag layer, a second oxygen-rich gas is supplied to the blowing slag layer by a blowing lance during the top-blowing, the second oxygen-rich gas forms a vortex to agitate the blowing slag layer, an outlet of the blowing lance is located above the blowing slag layer, wherein the thickness of the blowing slag layer is 50 mm to 300 mm, the blowing slag in the blowing slag layer is discharged, and the blister copper in the blister copper layer is continuously discharged; and

[0008] The blister copper is oxidized and reduced in sequence to obtain anode copper and refined slag.

[0009] The continuous copper smelting process according to the embodiment of the present invention has the advantages of high production efficiency, low copper content in the smelting slag layer, low operating cost, non-solidification of copper matte, low coal consumption, low content of elemental sulfur in flue gas, low energy consumption, high oxygen utilization rate, and low copper content in the blowing slag layer.

[0010] Optionally, the thickness of the copper matte layer is 900 mm-1200 mm, and the thickness of the smelting slag layer is 1400 mm-1700 mm. Optionally, the thickness of the copper matte layer is 1000 mm-1100 mm, and the thickness of the smelting slag layer is 1500 mm-1600 mm.

[0011] Optionally, the first oxygen-rich gas with an oxygen concentration of 75%-99% is provided to the smelting slag layer when the side-blowing smelting is carried out. Optionally, the first oxygen-rich gas with an oxygen concentration of 80%-99% is provided to the smelting slag layer when the side-blowing smelting is carried out. Optionally, a third oxygen-rich gas is sprayed into the flue gas generated by the side-blowing smelting so as to burn the flue gas. Optionally, the oxygen concentration of the third oxygen-rich gas is 20%-35%. Optionally, the oxygen concentration of the third oxygen-rich gas is 25%-30%. Optionally, the oxygen concentration of the second oxygen-rich gas is 20%-60%. Optionally, the oxygen concentration of the second oxygen-rich gas is 30%-50%.

[0012] 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 overflow. Optionally, the copper content of the blister copper is greater than or equal to 98.5wt%, and the sulfur content of the blister copper is less than or equal to 0.4wt%. Optionally, the copper content of the blowing slag is less than or equal to 14wt%. Optionally, the blister copper in the blister copper layer is continuously discharged by siphoning, the blowing slag in the blowing slag layer is continuously discharged by siphoning, or the blowing slag in the blowing slag layer is intermittently discharged by overflow.

[0013] 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, 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 blowing lance for providing the second oxygen-rich gas and the upper surface of the blowing slag layer is 1 mm-1000 mm, optionally, the distance between the outlet of the blowing lance for providing the second oxygen-rich gas and the upper surface of the blowing slag layer is 200 mm-300 mm.

[0014] Optionally, the blowing slag layer has a thickness of 100 mm to 200 mm, and optionally, the blister copper layer has a thickness of 800 mm to 1000 mm.

[0015] Optionally, the copper-containing raw material includes the cooled and crushed blowing slag, and the copper matte, the second flux and the cooled and crushed refined slag are top-blown. Optionally, the first flux includes at least one of quartz and quartz stone, and the second flux includes limestone. Optionally, the Fe / SiO2 of the smelting slag is greater than or equal to 1.4 and less than or equal to 2.0, and the Fe / CaO of the blowing slag is greater than or equal to 2.3 and less than or equal to 2.6. Optionally, the Fe / SiO2 of the smelting slag is greater 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°C and less than or equal to 1250°C, and the temperature of the smelting slag layer is greater than or equal to 1250°C and less than or equal to 1300°C. Optionally, the temperature of the blister copper layer is greater than or equal to 1220°C and less than or equal to 1240°C, and the temperature of the blowing slag layer is greater than or equal to 1260°C and less than or equal to 1300°C.

[0016] The continuous copper smelting system according to an embodiment of the present invention comprises:

[0017] A side-blown smelting furnace, the side-blown smelting furnace comprising a smelting chamber and a feed port, a smelting lance port, a smelting slag outlet and a copper matte outlet connected to the smelting chamber, the distance between the copper matte outlet and the bottom wall of the smelting chamber is 800 mm-1400 mm, and the distance between the smelting slag outlet and the bottom wall of the smelting chamber is 2100 mm-2600 mm;

[0018] A smelting spray gun, wherein the smelting spray gun is installed at the smelting spray gun mouth;

[0019] A top-blown converting furnace, the top-blown converting furnace comprising a converting chamber, and a copper matte inlet, a converting lance port, a converting slag outlet and a blister copper outlet connected to the converting chamber, the copper matte inlet is connected to the copper matte outlet, the distance between the blister copper outlet and the bottom wall of the converting chamber is 600 mm-1200 mm, and the distance between the converting slag outlet and the bottom wall of the converting chamber is 800 mm-1600 mm;

[0020] a blowing lance mounted at the blowing lance port; and

[0021] The anode furnace has a blister copper inlet, and the blister copper inlet is connected to the blister copper outlet.

[0022] The continuous copper smelting system according to the embodiment of the present invention has the advantages of high production efficiency, low copper content in the smelting slag layer, low operating cost, low construction cost, non-solidification of copper matte, low coal consumption, low content of elemental sulfur in flue gas, low energy consumption, high oxygen utilization rate, and low copper content in the blowing slag layer.

[0023] Optionally, the smelting chamber includes a smelting zone for side-blowing smelting, an electric thermal settling zone for settling copper matte, and a transition zone between the smelting zone and the electric thermal settling zone, the copper matte outlet is arranged on the part of the side-blown smelting furnace corresponding to the smelting zone, the smelting slag outlet is arranged on the part of the side-blown smelting furnace corresponding to the electric thermal settling zone, and electrodes are arranged in the electric thermal settling zone, wherein the bottom wall surface of the smelting chamber includes a first part corresponding to the smelting zone, a second part corresponding to the electric thermal settling zone and a third part corresponding to the transition zone, the second part is located above the first part, and the height difference between the second part and the first part is 600 mm-1000 mm, and the third part is inclined, the upper edge of the third part is connected to the second part, and the lower edge of the third part is connected to the first part.

[0024] Optionally, the blowing lance is rotatably mounted at the blowing lance port, and the distance between the outlet of the blowing lance and the bottom wall of the blowing chamber is greater than 1600 mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a flow chart of a continuous copper smelting process according to an embodiment of the present invention;

[0026] Figure 2 is a cross-sectional view of a side-blown smelting furnace of a continuous copper smelting system according to an embodiment of the present invention;

[0027] Figure 3 is a cross-sectional view of a side-blown smelting furnace of a continuous copper smelting system according to an embodiment of the present invention;

[0028] Figure 4 is a top view of a side-blown smelting furnace of a continuous copper smelting system according to an embodiment of the present invention;

[0029] Figure 5 is a cross-sectional view of a top-blowing converting furnace of a continuous copper smelting system according to an embodiment of the present invention;

[0030] Figure 6 yes Figure 5 A cross-sectional view along the AA direction;

[0031] Figure 7 yes Figure 5 A cross-sectional view along the BB direction;

[0032] Figure 8yes Figure 5 A cross-sectional view along the CC direction;

[0033] Fig. 9 yes Figure 5 A cross-sectional view along the DD direction;

[0034] Fig.10 4 is a flow chart of a continuous copper smelting process according to an embodiment of the present invention. DETAILED DESCRIPTION

[0035] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0036] The present invention provides a continuous copper smelting process. Figure 1 and Fig.10 As shown, the continuous copper smelting process according to an embodiment of the present invention comprises the following steps:

[0037] The copper-containing raw material and the first flux are subjected to side-blowing smelting to obtain a copper matte layer and a smelting slag layer. It can be understood by those skilled in the art that the smelting slag layer is located above the copper matte layer.

[0038] The thickness of the copper matte layer is 800 mm to 1400 mm, and the thickness of the smelting slag layer is 1300 mm to 1800 mm. In the related art, the thickness of the smelting slag layer is 900 mm to 1200 mm. Compared with the related art, the continuous copper smelting process according to the embodiment of the present invention increases the thickness of the smelting slag layer. By making the thickness of the smelting slag layer 1300 mm to 1800 mm, the flow rate of the first oxygen-rich gas blown into the smelting slag layer can be increased (i.e., the air volume can be increased) without overblowing, so as to increase the processing capacity of the side-blowing smelting, thereby improving the production efficiency of the continuous copper smelting process.

[0039] Optionally, the thickness of the smelting slag layer is 1400 mm-1700 mm. By making the thickness of the smelting slag layer 1400 mm-1700 mm, the flow rate of the first oxygen-enriched gas blown into the smelting slag layer can be further increased while avoiding overblowing, so as to further increase the processing capacity of the side-blowing smelting, thereby further improving the production efficiency of the continuous copper smelting process.

[0040] Optionally, the thickness of the smelting slag layer is 1500 mm-1600 mm. By making the thickness of the smelting slag layer 1500 mm-1600 mm, the flow rate of the first oxygen-enriched gas blown into the smelting slag layer can be further increased while avoiding overblowing, so as to further increase the processing capacity of the side-blowing smelting, thereby further improving the production efficiency of the continuous copper smelting process.

[0041] Among them, the copper content of the smelting slag layer in the related art is 1.7wt%, while the copper content of the smelting slag layer in the present application is less than 0.9wt%.

[0042] 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. In other words, the height of the outlet of the smelting lance is located at 1 / 100-1 / 2 of the height of the smelting slag layer from bottom to top.

[0043] In the related art, the thickness of the copper matte layer is 600 mm-700 mm. Compared with the related art, the continuous copper smelting process according to the embodiment of the present invention increases the thickness of the copper matte layer. By increasing the thickness of the copper matte layer to 800 mm-1400 mm, the copper matte of the copper matte layer is prevented from solidifying without thickening the furnace body of the side-blowing smelting furnace, so as to avoid freezing and blocking of the furnace cylinder, and reduce the construction cost of the side-blowing smelting furnace.

[0044] Optionally, the thickness of the copper matte layer is 900 mm-1200 mm. By increasing the thickness of the copper matte layer to 900 mm-1200 mm, the copper matte of the copper matte layer can be further prevented from solidifying without thickening the furnace body of the side-blown smelting furnace, so as to further prevent the furnace cylinder from freezing and freezing, and reduce the construction cost of the side-blown smelting furnace. In addition, the service life of the side-blown smelting furnace can be further extended.

[0045] Optionally, the thickness of the copper matte layer is 1000 mm-1100 mm. By increasing the thickness of the copper matte layer to 1000 mm-1100 mm, the copper matte of the copper matte layer can be further prevented from solidifying without thickening the furnace body of the side-blown smelting furnace, so as to further prevent the furnace cylinder from freezing and freezing, and reduce the construction cost of the side-blown smelting furnace. In addition, the service life of the side-blown smelting furnace can be further extended.

[0046] When the side-blowing smelting is performed, the first oxygen-rich gas is provided to the smelting slag layer by using the smelting lance. By providing the oxygen-rich gas to the smelting slag layer, more oxygen can be provided to the smelting slag layer.

[0047] This can not only reduce the coal consumption by about 2wt% (reducing the coal blending amount from 3wt% to less than 1wt% to prevent the generation of foamy slag) so as to reduce the cost of the continuous copper smelting process, but also reduce the content of elemental sulfur in the flue gas. Furthermore, the adhesion between the flue boiler and the electrostatic precipitator can be reduced, and the blockage of the plate and frame filter of the acid system can be avoided. Moreover, by providing oxygen-rich gas to the smelting slag layer, the gas volume can be reduced, and then the flue gas volume can be reduced and the concentration of sulfur dioxide in the flue gas can be increased. This can not only reduce the amount of flue gas treatment, but also make it easier to capture sulfur in the flue gas. Among them, the concentration of sulfur dioxide in the flue gas generated by the side-blowing smelting is 32%-50%.

[0048] Optionally, the first oxygen-rich gas having an oxygen concentration of 75%-99% is provided to the smelting slag layer during the side-blowing smelting. This can not only further reduce the coal consumption, so as to further reduce the cost of the continuous copper smelting process, but also further reduce the content of elemental sulfur in the flue gas. Furthermore, the adhesion between the flue boiler and the electric dust collector can be further reduced, and the blockage of the plate-frame filter of the acid-making system can be further avoided. In addition, the flue gas treatment volume can be further reduced, and it is more convenient to capture sulfur in the flue gas.

[0049] Optionally, the first oxygen-rich gas having an oxygen concentration of 80%-99% is provided to the smelting slag layer during the side-blowing smelting. This can not only further reduce the coal consumption, so as to further reduce the cost of the continuous copper smelting process, but also further reduce the content of elemental sulfur in the flue gas. Furthermore, the adhesion between the flue boiler and the electric dust collector can be further reduced, and the blockage of the plate-frame filter of the acid-making system can be further avoided. In addition, the flue gas treatment volume can be further reduced, and it is more convenient to capture sulfur in the flue gas.

[0050] The oxygen concentration of the first oxygen-rich gas refers to the percentage of the volume of oxygen in the first oxygen-rich gas to the volume of the first oxygen-rich gas.

[0051] Optionally, the temperature of the copper matte layer is greater than or equal to 1200°C and less than or equal to 1250°C, and the temperature of the smelting slag layer is greater than or equal to 1250°C and less than or equal to 1280°C.

[0052] Optionally, a third oxygen-enriched gas is sprayed into the flue gas generated by the side-blowing smelting to burn the flue gas. Thus, elemental sulfur in the flue gas can be oxidized, thereby preventing the flue gas from containing 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%.

[0053] The oxygen concentration of the third oxygen-rich gas refers to the percentage of the volume of oxygen in the third oxygen-rich gas to the volume of the third oxygen-rich gas.

[0054] The smelting slag in the smelting slag layer is discharged, and the copper matte in the copper matte layer is continuously discharged. In the related art, the copper matte in the copper matte layer is discharged intermittently. Since the copper matte outlet for discharging copper matte needs to be repaired after discharging 4000 tons to 6000 tons of copper matte, it is necessary to set a plurality of copper matte outlets so that copper matte can be discharged when one or more of the copper matte outlets are repaired, thereby increasing the manufacturing difficulty and manufacturing cost of the side-blown smelting furnace.

[0055] The present application continuously discharges the copper matte in the copper matte layer, thereby eliminating the need to maintain the copper matte outlet, thereby not only increasing the processing capacity of the side-blowing smelting, thereby improving the production efficiency of the continuous copper smelting process, but also reducing the manufacturing difficulty and manufacturing cost of the side-blowing smelting furnace, thereby reducing the operating cost of the continuous copper smelting process.

[0056] For example, 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.

[0057] The copper matte and the second flux are top-blown to obtain a blister copper layer and a blowing slag layer. During the top-blowing, a second oxygen-rich gas is provided to the blowing slag layer by a blowing lance, and the second oxygen-rich gas forms a vortex. By forming the second oxygen-rich gas into a vortex, not only can the second oxygen-rich gas (process air) be made uniform, but also the second oxygen-rich gas can be used to uniformly and fully stir the blowing slag layer, thereby facilitating mass and heat transfer of the melt. In addition, by forming the second oxygen-rich gas into a vortex, a vortex can also be formed around the blowing lance used to provide the second oxygen-rich gas, thereby extending the service life of the blowing lance.

[0058] The thickness of the blowing slag layer is 50 mm to 300 mm. In the related art, the thickness of the blowing slag layer is 400 mm to 500 mm. Compared with the related art, the continuous copper smelting process according to the embodiment of the present invention reduces the thickness of the blowing slag layer. By reducing the thickness of the blowing slag layer to 50 mm to 300 mm, the blast pressure can be reduced (from 3.5 kg / cm 3 Reduce to 2.0~2.5 kg / cm 3 ) in order to reduce energy consumption.

[0059] Furthermore, by reducing the thickness of the converting slag layer to 50 mm to 300 mm, the second oxygen-rich gas can more easily pass through the converting slag layer to reach the blister copper layer. The second oxygen-rich gas reaching the blister copper layer reacts with blister copper to generate cuprous oxide, and the generated cuprous oxide interacts with the copper matte in the converting slag layer to accelerate the reaction process and increase the oxygen utilization rate from 92% to more than 99%.

[0060] By reducing the thickness of the blowing slag layer, the second oxygen-rich gas can fully stir the blowing slag layer. As a result, the generated cuprous oxide can react quickly with the copper matte in the blowing slag layer to generate copper and sulfur dioxide, and the copper instantly settles into the crude copper layer, thereby effectively reducing the copper content of the blowing slag layer. The copper content of the blowing slag layer in the related art is 20wt%-35wt%, and the copper content of the blowing slag layer in the present application is 10wt%-14wt%.

[0061] However, if the thickness of the blowing slag layer is less than 50 mm, it will cause difficulty in discharging the blowing slag, and crude copper will be brought out when the blowing slag is discharged, resulting in an increase in the copper content of the blowing slag.

[0062] Optionally, the thickness of the blowing slag layer is 100 mm to 200 mm, which is not only more conducive to discharging the blowing slag, but also can further accelerate the reaction process, further improve the utilization rate of oxygen, and more effectively reduce the copper content of the blowing slag layer.

[0063] Optionally, the thickness of the blister copper layer is 800 mm-1000 mm. In the related art, the thickness of the blister copper layer is 700 mm. Compared with the related art, the continuous copper smelting process according to the embodiment of the present invention increases the thickness of the blister copper layer. By increasing the thickness of the blister copper layer to 800 mm-1000 mm, the oxygen potential of the blister copper layer can be increased, that is, the oxygen content of the blister copper layer is increased, so that the sulfur content of the blister copper layer can be reduced. Among them, the sulfur content of the blister copper layer in the related art is 0.7wt%, and the sulfur content of the blister copper layer of the present application is less than or equal to 0.4wt%.

[0064] Optionally, the temperature of the blister copper layer is greater than or equal to 1220°C and less than or equal to 1240°C, and the temperature of the blowing slag layer is greater than or equal to 1260°C and less than or equal to 1300°C.

[0065] In addition, by providing the second oxygen-rich gas to the blowing slag layer, autothermal smelting can be achieved. Moreover, by providing the second oxygen-rich gas to the blowing slag layer, the gas volume can be reduced, thereby reducing the flue gas volume and increasing the concentration of sulfur dioxide in the flue gas. This can not only reduce the flue gas processing volume, but also make it easier to capture sulfur in the flue gas. Among them, the concentration of sulfur dioxide in the flue gas generated by the top blowing is 25%-40%.

[0066] 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%. This can further reduce the amount of flue gas treatment and make it easier to capture sulfur in the flue gas. The oxygen concentration of the second oxygen-enriched gas refers to the percentage of the volume of oxygen in the second oxygen-enriched gas to the volume of the second oxygen-enriched gas.

[0067] Optionally, the distance between the outlet of the blowing lance for providing the second oxygen-rich gas and the upper surface of the blowing slag layer is 1 mm to 1000 mm. Optionally, the distance between the outlet of the blowing lance for providing the second oxygen-rich gas and the upper surface of the blowing slag layer is 200 mm to 300 mm.

[0068] The blowing slag in the blowing slag layer is discharged, and the blister copper in the blister copper layer is continuously discharged. In the related art, the blister copper in the blister copper layer is discharged intermittently. Since the blister copper outlet for discharging blister copper needs to be repaired after discharging 4,000 tons to 6,000 tons of blister copper, it is necessary to set a plurality of blister copper outlets so that the blister copper can be discharged when one or more of the blister copper outlets are repaired, thereby increasing the manufacturing difficulty and manufacturing cost of the top-blowing converting furnace.

[0069] The present application continuously discharges the blister copper in the blister copper layer, thereby eliminating the need to maintain the blister copper outlet, thereby increasing the processing capacity of the top-blowing conversion process, thereby improving the production efficiency of the continuous copper smelting process, and reducing the manufacturing difficulty and manufacturing cost of the top-blowing conversion furnace, thereby reducing the operating cost of the continuous copper smelting process.

[0070] For example, the blister copper in the blister copper layer is continuously discharged by siphoning, the converted slag in the converted slag layer is continuously discharged by siphoning, or the converted slag in the converted slag layer is intermittently discharged by overflowing.

[0071] Optionally, the copper content of the crude copper is greater than or equal to 98.5wt%, and the sulfur content of the crude copper is less than or equal to 0.4wt%.

[0072] Optionally, the blown slag can be discharged into a blown slag bag, and after cooling, it is crushed and returned to the side-blown smelting furnace. The copper-containing raw material can include copper concentrate and the cooled and crushed blown slag. Optionally, the first flux includes at least one of quartz and quartz stone. The Fe / SiO2 of the smelting slag is greater than or equal to 1.4 and less than or equal to 2.0. Optionally, the Fe / SiO2 of the smelting slag is greater than or equal to 1.5 and less than or equal to 1.8.

[0073] The crude copper is oxidized and reduced in sequence to obtain anode copper and refined slag. Optionally, the anode copper flows into a casting machine through a chute to be cast into anode plates, and the refined slag is discharged into a slag bag and returned to the side-blown smelting furnace or the top-blown converting furnace after cooling and crushing.

[0074] Optionally, the copper matte, the second flux and the cooled and crushed refined slag are top-blown, and the second flux includes limestone. Optionally, the Fe / CaO of the blown slag is greater than or equal to 2.3 and less than or equal to 2.6. In addition, during the top-blowing, secondary copper materials such as residual anodes, waste anode plates, and copper rice can also be processed.

[0075] The following describes a continuous copper smelting system according to an embodiment of the present invention with reference to the accompanying drawings. Figure 2-Figure 9 As shown, 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 figure).

[0076] The side-blowing smelting furnace 10 has a smelting chamber 11 and a feed port 12, a smelting lance port, a smelting slag outlet 13 and a copper matte outlet 14 connected to the smelting chamber 11. The smelting lance 20 is installed at the smelting 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 800-1400 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.

[0077] The top-blowing 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 connected to the converting chamber 31. A converting lance 40 is installed at the converting lance port. The copper matte inlet is connected to the copper matte outlet 14 so that the copper matte discharged from the side-blowing 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 600-1200 mm. The distance between the converting slag outlet and the bottom wall surface 311 of the converting chamber 31 is 800 mm-1600 mm, so that the thickness of the converting slag layer is 50-300 mm.

[0078] The anode furnace has a blister copper inlet, which is connected to the blister copper outlet so that the blister copper discharged from the top-blowing converting furnace 30 can enter the anode furnace.

[0079] The continuous copper smelting system according to the embodiment of the present invention can be used to implement the continuous copper smelting process according to the above-mentioned embodiment of the present invention.

[0080] like Figure 2 As shown, the smelting chamber 11 includes a smelting zone 112 for side-blowing smelting, an electrothermal settling zone 113 for settling copper matte, and a transition zone 114 between the smelting zone 112 and the electrothermal settling zone 113. The copper matte outlet 14 is provided on the portion of the side-blowing smelting furnace 10 corresponding to the smelting zone 112, and the smelting slag outlet 13 is provided on the portion of the side-blowing smelting furnace 10 corresponding to the electrothermal settling zone 113. In other words, the copper matte outlet 14 is provided on the wall surface of the smelting zone 112, and the smelting slag outlet 13 is provided on the wall surface of the electrothermal settling zone 113. Electrodes 15 are provided in the electrothermal settling zone 113.

[0081] 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 electrothermal precipitation 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 arranged obliquely, 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.

[0082] By providing the electrothermal settling zone 113, the smelting slag and the copper matte can be separated better and more fully, so as to reduce the copper content of the smelting slag. In addition, by locating the second portion 1112 above the first portion 1111 and arranging the third portion 1113 at an angle, it is beneficial for the copper matte in the electrothermal settling zone 113 to flow to the smelting zone 112, and further beneficial for discharging the copper matte.

[0083] The feed port 12 is arranged above the smelting zone 112. The material completes the reaction and preliminary slag-matte separation in the smelting zone 112, and completes the slag-matte separation in the electric heat settling zone 113. The smelting slag outlet 13 is arranged at one end of the electric heat 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 stepped manner, and the part in the electric heat settling zone 113 is 600-1000 mm higher than the bottom of the smelting zone 112.

[0084] The flue 13 of the side-blown smelting furnace 10 is a refractory brick flue, that is, the flue 13 of the side-blown smelting furnace 10 is made of refractory bricks. This can reduce smoke adhesion. Specifically, the height of the flue 13 of the side-blown smelting furnace 10 is 8 meters to 15 meters. Optionally, the height of the flue 13 of the side-blown smelting furnace 10 is 10 meters to 12 meters. The high-temperature flue gas produced by the side-blown smelting passes through the flue 13 into the waste heat boiler to recover waste heat. The interface between the flue 13 and the waste heat boiler adopts a specially designed copper water jacket water-cooled door frame structure, and is sent to acid production after dust collection by the dust collector.

[0085] like Figure 3 As shown, the side-blown smelting furnace 10 is further provided with a secondary air lance 50, which is located above the smelting lance 20. The smelting lance 20 may be 1-80, and the secondary air lance 50 may be 1-10. The secondary air lance 50 may be located on both sides of the side-blown smelting furnace 10, and the secondary air lance 50 sprays oxygen-enriched air with an oxygen concentration of 25%-30% as secondary air.

[0086] Optionally, the blowing lance 40 is rotatably mounted at the blowing lance port, so that the blowing lance 40 can be burned evenly, thereby enabling the blowing lance 40 to provide evenly the second oxygen-rich gas, that is, the blowing lance 40 can spray air evenly, thereby stirring the blowing slag layer more evenly.

[0087] Optionally, the distance between the outlet of the blowing lance 40 and the bottom wall 311 of the blowing chamber 31 is greater than 1600 mm. Thus, the outlet of the blowing lance 40 can be located above the blowing slag layer, thereby extending the service life of the blowing lance 40.

[0088] The number of the blowing lances 40 may be 1 to 12, and the blowing lances 40 may be arranged in a single row, double rows, or multiple rows in the length direction of the top-blowing blowing furnace 30 .

[0089] The top of the top-blown converting furnace 30 may be provided with 1-3 feeding ports for adding materials such as flux. The flue 32 of the top-blown converting furnace 30 is a refractory brick flue, that is, the flue 32 of the top-blown converting furnace 30 is made of refractory bricks. This can reduce the adhesion of smoke and dust. Specifically, the height of the flue 32 of the top-blown converting furnace 30 is 6 meters to 10 meters. Optionally, the flue 32 of the top-blown converting furnace 30 has a copper water jacket.

[0090] like Figure 5-Figure 7 As shown, the furnace body 33 of the top-blowing converting furnace 30 includes an elastic skeleton 331 and a furnace body 332. The furnace body 332 is arranged on the elastic skeleton 331, the furnace body 332 has a furnace cover and the converting chamber 31 is formed in the furnace body 332. A plurality of converting lances 40 are mounted on the elastic skeleton 331 and extend downward through the furnace cover into the converting chamber 31. The elastic skeleton 331 is used to support the furnace body 332 and can play a role in shock absorption and buffering for the furnace body 332. The furnace body 332 can be rectangular.

[0091] Alternatively, if Figure 3-Figure 5 As shown, the cross-sectional area of ​​the blowing chamber 31 gradually decreases from top to bottom. For example, each side wall of the furnace body 33 is inclined outward from bottom to top. The top-blown converting furnace 30 can be designed with cooling and refractory design for different parts to ensure the service life of the top-blown converting furnace 30, and the residual anode and other cold copper materials can be flexibly added according to the needs of heat balance. For example, various forms of cooling design can be carried out for the molten pool part, the slag line part, the furnace top, the flue and other parts, so as to further improve the safety of the top-blown converting furnace 30 and further extend the service life of the top-blown converting furnace 30.

[0092] The continuous copper smelting process and the continuous copper smelting system according to the embodiment of the present invention have an operating rate of more than 95%. The continuous copper smelting process and the continuous copper smelting system according to the embodiment of the present invention have a copper recovery rate of >99%, a sulfur recovery rate of >98.5%, a sulfur capture rate of >99.6, a gold recovery rate of 99%, and a silver recovery rate of 98%.

[0093] Example 1

[0094] The annual processing capacity of copper concentrate is 1 million tons, and the copper concentrate contains 8% water, 20.2% copper, 31% sulfur, 13.4g / t gold, and 170g / t silver. The annual working days are 330 days. There are 1 side-blowing smelting furnace 10, 1 top-blowing converting furnace 30, and 2 anode furnaces.

[0095] The oxygen enrichment concentration of the primary air of the side-blowing smelting is 85%, the oxygen enrichment concentration of the secondary air is 28%, the iron-silicon ratio is 1.6, the smelting slag temperature is 1270℃, the copper matte temperature is 1230℃; the copper content of the smelting slag is 0.8%, the copper matte grade is 72%, and the sulfur dioxide concentration in the flue gas is 35.58%. The thickness of the copper matte layer is 900 mm, and the thickness of the smelting slag layer is 1600 mm.

[0096] The blowing lance 40 has a top blowing oxygen concentration of 38%, an iron-calcium ratio of 2.5, a blowing slag temperature of 1280°C, and a crude copper temperature of 1240°C; the blowing slag contains 14% copper, the flue gas sulfur dioxide concentration is 28.79%, and the crude copper contains 98.9% copper and 0.3% sulfur. The thickness of the blowing slag layer is 100 mm, and the thickness of the crude copper layer is 1000 mm.

[0097] The anode copper contains 99.4% copper, 65.77g / t gold and 810.2g / t silver. The copper recovery rate is 98.85%, the gold recovery rate is 98.55% and the silver recovery rate is 97.19%.

[0098] Example 2

[0099] The annual processing capacity of copper concentrate is 1.5 million tons, with a water content of 8% and a copper content of 22%. The annual working days are 330 days. There are 1 side-blowing smelting furnace 10, 1 top-blowing converting furnace 30, and 2 anode furnaces.

[0100] The oxygen enrichment concentration of the primary air of the side-blowing smelting is 83%, the oxygen enrichment concentration of the secondary air is 26%, the iron-silicon ratio is 1.5, the smelting slag temperature is 1280℃, the copper matte temperature is 1240℃; the copper content of the smelting slag is 0.75%, the copper matte grade is 73%, and the sulfur dioxide concentration in the flue gas is 36.76%. The thickness of the copper matte layer is 1200 mm, and the thickness of the smelting slag layer is 1500 mm.

[0101] The blowing lance 40 top blowing has an oxygen enrichment concentration of 34%, an iron-calcium ratio of 2.5, a blowing slag temperature of 1290°C, and a crude copper temperature of 1246°C; the blowing slag contains 12% copper, the flue gas sulfur dioxide concentration is 31.79%, and the crude copper contains 99.1% copper and 0.25% sulfur. The thickness of the blowing slag layer is 200 mm, and the thickness of the crude copper layer is 800 mm.

[0102] The anode copper contains 99.5% copper and the copper recovery rate is 98.91%.

[0103] Example 3

[0104] The annual processing capacity of copper concentrate is 1.8 million tons, with a water content of 8% and a copper content of 23.4%; the annual working days are 330 days. There are 1 side-blown smelting furnace 10, 1 top-blown converting furnace 30, and 2 anode furnaces.

[0105] The oxygen enrichment concentration of the primary air in the side-blowing smelting process is 90%, the oxygen enrichment concentration of the secondary air is 29%, the iron-silicon ratio is 1.8, the smelting slag temperature is 1260℃, the copper matte temperature is 1220℃; the copper content of the smelting slag is 0.86%, the copper matte grade is 75%, and the sulfur dioxide concentration in the flue gas is 39.2%. The thickness of the copper matte layer is 1100 mm, and the thickness of the smelting slag layer is 1550 mm.

[0106] The blowing lance 40 top blowing has an oxygen enrichment concentration of 42%, an iron-calcium ratio of 2.3, a blowing slag temperature of 1285°C, and a crude copper temperature of 1239°C; the blowing slag contains 11% copper, the flue gas sulfur dioxide concentration is 33.5%, and the crude copper contains 99.2% copper and 0.38% sulfur. The thickness of the blowing slag layer is 150 mm, and the thickness of the crude copper layer is 900 mm. The anode copper contains 99.6% copper, and the copper recovery rate is 98.82%.

[0107] Example 4

[0108] The annual processing capacity of copper concentrate is 1 million tons, and the copper concentrate contains 8% water, 20.2% copper, 31% sulfur, 13.4g / t gold, and 170g / t silver. The annual working days are 330 days. There are 1 side-blowing smelting furnace 10, 1 top-blowing converting furnace 30, and 2 anode furnaces.

[0109] The oxygen enrichment concentration of the primary air in the side-blowing smelting process is 85%, the oxygen enrichment concentration of the secondary air is 28%, the iron-silicon ratio is 1.6, the smelting slag temperature is 1270℃, the copper matte temperature is 1230℃; the copper content of the smelting slag is 0.9%, the copper matte grade is 73%, and the sulfur dioxide concentration in the flue gas is 38.5%. The thickness of the copper matte layer is 800 mm, and the thickness of the smelting slag layer is 1800 mm.

[0110] The blowing lance 40 has a top blowing oxygen concentration of 38%, an iron-calcium ratio of 2.5, a blowing slag temperature of 1280°C, and a crude copper temperature of 1240°C; the blowing slag contains 14% copper, the flue gas sulfur dioxide concentration is 32%, and the crude copper contains 99% copper and 0.4% sulfur. The thickness of the blowing slag layer is 50 mm, and the thickness of the crude copper layer is 1000 mm.

[0111] The anode copper contains 99.3% copper, 65.6g / t gold and 595g / t silver. The copper recovery rate is 98.6%, the gold recovery rate is 98% and the silver recovery rate is 97%.

[0112] Example 5

[0113] The annual processing capacity of copper concentrate is 1 million tons, and the copper concentrate contains 8% water, 20.2% copper, 31% sulfur, 13.4g / t gold, and 170g / t silver. The annual working days are 330 days. There are 1 side-blowing smelting furnace 10, 1 top-blowing converting furnace 30, and 2 anode furnaces.

[0114] The oxygen enrichment concentration of the primary air of the side-blowing smelting is 85%, the oxygen enrichment concentration of the secondary air is 28%, the iron-silicon ratio is 1.6, the smelting slag temperature is 1270℃, the copper matte temperature is 1230℃; the copper content of the smelting slag is 0.95%, the copper matte grade is 73%, and the sulfur dioxide concentration in the flue gas is 37.5%. The thickness of the copper matte layer is 1400 mm, and the thickness of the smelting slag layer is 1300 mm.

[0115] The blowing lance 40 top blowing has an oxygen enrichment concentration of 38%, an iron-calcium ratio of 2.5, a blowing slag temperature of 1280°C, and a crude copper temperature of 1240°C; the blowing slag contains 12% copper, the flue gas sulfur dioxide concentration is 33%, and the crude copper contains 98.6% copper and 0.42% sulfur. The thickness of the blowing slag layer is 300 mm, and the thickness of the crude copper layer is 850 mm.

[0116] The anode copper contains 99.2% copper, 65g / t gold and 592g / t silver. The copper recovery rate is 98.5%, the gold recovery rate is 97.8% and the silver recovery rate is 96.8%.

[0117] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0118] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0119] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0120] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0121] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0122] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A continuous copper smelting process, characterized in that: The continuous copper smelting system adopted in the continuous copper smelting process comprises: A side-blown smelting furnace, the side-blown smelting furnace having a smelting chamber and a feed port, a smelting lance port, a smelting slag outlet and a matte outlet connected to the smelting chamber, the distance between the matte outlet and the bottom wall of the smelting chamber is 800 mm-1400 mm, and the distance between the smelting slag outlet and the bottom wall of the smelting chamber is 2100 mm-2600 mm; the smelting chamber comprises a smelting zone for side-blown smelting, an electrothermal settling zone for settling matte, and a transition zone between the smelting zone and the electrothermal settling zone, the matte outlet is arranged on a portion of the side-blown smelting furnace corresponding to the smelting zone, the smelting slag outlet is arranged on a portion of the side-blown smelting furnace corresponding to the electrothermal settling zone, and electrodes are arranged in the electrothermal settling zone; A smelting spray gun, wherein the smelting spray gun is installed at the smelting spray gun mouth; A top-blown converting furnace, the top-blown converting furnace comprising a converting chamber, and a copper matte inlet, a converting lance port, a converting slag outlet and a blister copper outlet connected to the converting chamber, the copper matte inlet being connected to the copper matte outlet, the blister copper outlet being at a distance of 600 mm to 1200 mm from the bottom wall of the converting chamber, and the converting slag outlet being at a distance of 800 mm to 1600 mm from the bottom wall of the converting chamber; a blowing lance mounted at the blowing lance port; and an anode furnace, the anode furnace having a blister copper inlet, the blister copper inlet being in communication with the blister copper outlet; The process of continuous copper smelting using the continuous copper smelting system comprises the following steps: Performing side-blowing smelting on the copper-containing raw material and the first flux to obtain a copper matte layer and a smelting slag layer, providing a first oxygen-rich gas to the smelting slag layer by a smelting lance during the side-blowing smelting, wherein the oxygen concentration of the first oxygen-rich gas is 80%-99%, wherein the thickness of the copper matte layer is 900 mm-1400 mm, and the thickness of the smelting slag layer is 1600 mm-1800 mm, discharging smelting slag in the smelting slag layer, and continuously discharging the copper matte in the copper matte layer to the copper matte inlet of the top-blowing converting furnace, wherein the copper content of the smelting slag is less than or equal to 0.9wt%, the first flux comprises at least one of quartz and quartz stone, and the Fe / SiO2 of the smelting slag is greater than or equal to 1.4 and less than or equal to 2.0; The copper matte and the second flux are top-blown to obtain a blister copper layer and a blowing slag layer, wherein the thickness of the blister copper layer is 1000 mm-1200 mm, a second oxygen-rich gas is provided to the blowing slag layer by a blowing lance during the top-blowing, the second oxygen-rich gas forms a vortex to agitate the blowing slag layer, the second oxygen-rich gas reaching the blister copper layer reacts with the blister copper to generate cuprous oxide, and the generated cuprous oxide interacts with the copper matte in the blowing slag layer, the outlet of the blowing lance is located above the blowing slag layer, 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, L / H is greater than or equal to 1 / 100 and less than or equal to 1 / 2, and the second flux comprises limestone; wherein the thickness of the blowing slag layer is 50 mm to 200 mm, the blowing slag in the blowing slag layer is discharged, the blister copper in the blister copper layer is continuously discharged, the oxygen concentration of the second oxygen-rich gas is 30% to 60%, the copper content of the blowing slag is less than or equal to 14wt%, the Fe / CaO of the blowing slag is greater than or equal to 2.3 and less than or equal to 2.6, the copper content of the blister copper is greater than or equal to 98.5wt%, and the sulfur content of the blister copper is less than or equal to 0.4wt%; and The crude copper is oxidized and reduced in sequence to obtain anode copper and refined slag; A third oxygen-rich gas is sprayed into the flue gas generated by the side-blowing smelting to burn the flue gas, and the oxygen concentration of the third oxygen-rich gas is 20%-35%.

2. The continuous copper smelting process according to claim 1, characterized in that: The thickness of the copper matte layer is 900 mm to 1200 mm.

3. The continuous copper smelting process according to claim 1, characterized in that: The thickness of the blowing slag layer is 100 mm to 200 mm.

4. The continuous copper smelting process according to claim 1, characterized in that: The copper-containing raw material includes the cooled and crushed converted slag, and top blowing is performed on the copper matte, the second flux and the cooled and crushed refined slag.

5. The continuous copper smelting process according to claim 1, characterized in that: The oxygen concentration of the third oxygen-rich gas is 25%-30%.

6. The continuous copper smelting process according to claim 1, characterized in that: The oxygen concentration of the second oxygen-rich gas is 30%-50%.

7. The continuous copper smelting process according to claim 1, characterized in that: The copper matte in the copper matte layer is continuously discharged by siphoning, and the smelting slag in the smelting slag layer is continuously discharged by siphoning or intermittently discharged by overflowing.

8. The continuous copper smelting process according to claim 1, characterized in that: The blister copper in the blister copper layer is continuously discharged by siphoning, and the converted slag in the converted slag layer is continuously discharged by siphoning or intermittently discharged by overflowing.

9. The continuous copper smelting process according to claim 1, characterized in that: The distance between the outlet of the blowing lance for providing the second oxygen-rich gas and the upper surface of the blowing slag layer is 1 mm to 1000 mm.

10. The continuous copper smelting process according to claim 9, characterized in that: The distance between the outlet of the blowing lance for providing the second oxygen-rich gas and the upper surface of the blowing slag layer is 200 mm to 300 mm.

11. The continuous copper smelting process according to claim 1, characterized in that: The Fe / SiO2 of the smelting slag is greater than or equal to 1.5 and less than or equal to 1.

8.

12. The continuous copper smelting process according to claim 1, characterized in that: The temperature of the copper matte layer is greater than or equal to 1200°C and less than or equal to 1250°C, and the temperature of the smelting slag layer is greater than or equal to 1250°C and less than or equal to 1300°C.

13. The continuous copper smelting process according to claim 1, characterized in that: The temperature of the blister copper layer is greater than or equal to 1220° C. and less than or equal to 1240° C., and the temperature of the blowing slag layer is greater than or equal to 1260° C. and less than or equal to 1300° C.

14. The continuous copper smelting process according to claim 1, characterized in that: The bottom wall surface of the smelting chamber includes a first part corresponding to the smelting zone, a second part corresponding to the electric heat precipitation zone and a third part corresponding to the transition zone, the second part is located above the first part, and the height difference between the second part and the first part is 600 mm-1000 mm, and the third part is inclined, the upper edge of the third part is connected to the second part, and the lower edge of the third part is connected to the first part.

15. The continuous copper smelting process according to claim 14, characterized in that: The blowing lance is rotatably mounted at the blowing lance port, and the distance between the outlet of the blowing lance and the bottom wall of the blowing chamber is greater than 1600 mm.

16. The continuous copper smelting process according to claim 15, characterized in that: The flue of the side-blowing smelting furnace is a refractory brick flue, and the flue of the top-blowing converting furnace is a refractory brick flue.

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