Smelting device

Abstract

The utility model provides a smelting device which comprises a smelting furnace, a converting furnace and a rotary anode furnace, an outlet of the smelting furnace is connected with an inlet of the converting furnace through a matte controller, an outlet of the converting furnace is connected with an inlet of the rotary anode furnace through a crude copper controller, and the matte controller comprises a first main body and a crude copper controller second main body. First spray gun assemblies are arranged on the first main body and the second main body, the ends, provided with spray heads, of the first spray gun assemblies face melt conveying channels in the first main body and the second main body, the ends, away from the melt conveying channels, of the first spray gun assemblies are connected with first blowing gas conveying pipes, and the first spray gun assemblies are of a double-layer sleeve structure; the inner layer of the first spray gun assembly is used for introducing natural gas, the outer layer of the first spray gun assembly is used for introducing combustion-supporting air, and the first spray gun assembly is arranged, so that heat preservation or temperature rising operation can be performed on matte or crude copper in the matte controller and the crude copper controller through the first spray gun assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of copper metallurgy, and particularly relates to a smelting device. Background Art

[0002] Today, the development of copper smelting technology is changing with each passing day. All kinds of process technologies are developing in the direction of strengthening metallurgy, environmental protection, low carbon, strong raw material adaptability, and efficient comprehensive recovery, and the technology iteration and update are relatively fast. Especially the copper smelting process with continuous production process has the advantages of short process, small smoke emission, high direct recovery rate, etc., and develops rapidly.

[0003] As the first step in the copper smelting process, the quality of the matte produced in the smelting process has a great impact on the production stability of the downstream processes; the quality of the blister copper produced in the converting process has a great impact on the anode refining process.

[0004] In the prior art, in the existing smelting process, affected by factors such as fluctuations in the grade of copper concentrate and instability of the flue gas system, the grade of the matte produced by the smelting furnace has certain fluctuations, which will bring great difficulties to operations such as air supply and flux addition for slag formation in the converting process; the sulfur and oxygen content in the blister copper produced in the existing converting process is too high, which will cause the sulfur content in the anode furnace flue gas to exceed the standard or even the tail gas emission to exceed the standard, and the consumption of reducing natural gas in the anode furnace is too high. Summary of the Utility Model

[0005] Based on this, the purpose of the utility model is to provide a smelting device, which can effectively solve the deficiencies in the above-mentioned prior art.

[0006] A smelting device, which sequentially includes a smelting furnace, a converting furnace, and a rotary anode furnace in the smelting sequence. The outlet of the smelting furnace is connected to the inlet of the converting furnace through a matte controller for adjusting the copper mass percentage of the matte produced by the smelting furnace. The outlet of the converting furnace is connected to the inlet of the rotary anode furnace through a blister copper controller for adjusting the copper mass percentage of the blister copper produced by the converting furnace. The matte controller includes a first main body, and the blister copper controller includes a second main body. A first spray gun assembly is provided on both the first main body and the second main body. One end of the first spray gun assembly with a nozzle faces the melt transportation channel in the first main body and the second main body. The end of the first spray gun assembly far from the melt transportation channel is connected to a first blowing gas delivery pipe. The first spray gun assembly adopts a double-layer sleeve structure. The inner layer of the first spray gun assembly is used to introduce natural gas, and the outer layer of the first spray gun assembly is used to introduce combustion-supporting air. A second spray gun assembly is further provided on the first main body. One end of the second spray gun assembly with a nozzle faces the melt transportation channel in the first main body. The end of the second spray gun assembly far from the melt transportation channel is connected to a second blowing gas delivery pipe for introducing oxygen-enriched air. A third spray gun assembly is further provided on the second main body. One end of the third spray gun assembly with a nozzle faces the melt transportation channel in the second main body. The end of the third spray gun assembly far from the melt transportation channel is connected to a third blowing gas delivery pipe for introducing oxygen-enriched air or natural gas.

[0007] Compared with the prior art, the beneficial effects of the present utility model are as follows: By providing the first spray gun assembly, heat preservation or temperature increase operations can be performed on the matte or blister copper in the matte controller and the blister copper controller through the first spray gun assembly; By providing the second spray gun assembly, when the copper mass percentage of the matte produced by the smelting furnace is lower than the set value, oxygen-enriched air can be introduced into the melt transportation channel of the first main body through the second spray gun assembly to react with the matte, so as to remove the sulfur element therein and increase the copper mass percentage of the matte. Furthermore, the composition of the matte produced by the smelting furnace can be adjusted in real time through the matte controller, avoiding the influence of unqualified smelting products on the next process and ensuring the production stability of the continuous copper smelting process; By providing the third spray gun assembly, when the copper mass percentage of the blister copper produced by the converting furnace is lower than the set value, oxygen-enriched air can be introduced into the melt transportation channel of the second main body through the third spray gun assembly to react with the blister copper, so as to remove the impurity elements therein and increase the copper mass percentage of the blister copper; or natural gas can be introduced into the melt transportation channel of the second main body through the third spray gun assembly to react with the blister copper to reduce the over-oxidized blister copper and increase the copper mass percentage of the blister copper. Furthermore, the composition of the blister copper produced by the converting furnace can be adjusted in real time through the blister copper controller, avoiding the influence of unqualified converting products on the next process and ensuring the production stability of the continuous copper smelting process.

[0008] Further, the volume fraction of oxygen in the oxygen-enriched air introduced into the second spray gun assembly is 40-90%.

[0009] Further, the volume fraction of oxygen in the oxygen-enriched air introduced into the third spray gun assembly is 21-50%.

[0010] Further, the smelting device further includes a first flue gas and sulfuric acid production system and a slag separation system, and both the slag separation system and the first flue gas and sulfuric acid production system are connected to the smelting furnace.

[0011] Further, the smelting device further includes a second flue gas and sulfuric acid production system, a slag casting system, and a spent anode crushing system, and both the second flue gas and sulfuric acid production system, the slag casting system, and the spent anode crushing system are connected to the converting furnace.

[0012] Further, the smelting device further includes a flue gas and desulfurization system, and the flue gas and desulfurization system is connected to the rotary anode furnace.

[0013] Further, the smelting furnace, the converting furnace, and the rotary anode furnace are arranged in a stepped manner from high to low in sequence.

[0014] Further, the bodies of the matte controller and the blister copper controller are both a rectangular heat-resistant container.

[0015] Further, the smelting furnace can introduce oxygen-enriched air from the side or top of the furnace body for smelting reaction, and the volume fraction of oxygen in the oxygen-enriched air is 60-90%.

[0016] Further, the converting furnace can introduce oxygen-enriched air from the side or top of the furnace body for smelting reaction, and the volume fraction of oxygen in the oxygen-enriched air is 21-30%. Description of the Drawings

[0017] Figure 1 is a structural block diagram of a continuous copper smelting facility in an embodiment of the present invention;

[0018] Figure 2 is a process flow diagram of a continuous copper smelting facility in an embodiment of the present invention;

[0019] Main Element Symbol Description:

[0020] Smelting furnace 10 Cathode crushing system 33 First flue gas and sulfuric acid production system 11 Blister copper controller 40 Slag separation system 12 Rotary anode furnace 50 Matte controller 20 Flue gas and desulfurization system 51 Converter 30 First spray gun assembly 60 Second flue gas and sulfuric acid production system 31 Second spray gun assembly 70 Slag casting system 32 Third spray gun assembly 80

[0021] The following specific embodiments will further illustrate the present invention in conjunction with the above drawings. Specific Embodiments

[0022] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant accompanying drawings. Several embodiments of the present utility model are given in the drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present utility model more thorough and comprehensive.

[0023] It should be noted that when an element is referred to as being "fixedly provided on" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs. The terms used herein in the description of the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0025] Please refer to Figures 1 to 2, an embodiment of the present utility model provides a smelting device, which sequentially includes a smelting furnace 10, a converting furnace 30, and a rotary anode furnace 50 according to the smelting sequence. The outlet of the smelting furnace 10 is connected to the inlet of the converting furnace 30 through a matte controller 20 for adjusting the copper mass percentage of the matte produced by the smelting furnace 10. The outlet of the converting furnace 30 is connected to the inlet of the rotary anode furnace 50 through a blister copper controller 40 for adjusting the copper mass percentage of the blister copper produced by the converting furnace 30. The matte controller 20 includes a first main body, and the blister copper controller 40 includes a second main body. A first spray gun assembly 60 is provided on both the first main body and the second main body. One end of the first spray gun assembly 60 with a nozzle faces the melt transportation channel in the first main body and the second main body. The end of the first spray gun assembly 60 far from the melt transportation channel is connected to a first blowing gas delivery pipe. The first spray gun assembly 60 adopts a double-layer sleeve structure. The inner layer of the first spray gun assembly 60 is used to introduce natural gas, and the outer layer of the first spray gun assembly 60 is used to introduce combustion-supporting air. A second spray gun assembly 70 is further provided on the first main body. One end of the second spray gun assembly 70 with a nozzle faces the melt transportation channel in the first main body. The end of the second spray gun assembly 70 far from the melt transportation channel is connected to a second blowing gas delivery pipe for introducing oxygen-enriched air. A third spray gun assembly 80 is further provided on the second main body. One end of the third spray gun assembly 80 with a nozzle faces the melt transportation channel in the second main body. The end of the third spray gun assembly 80 far from the melt transportation channel is connected to a third blowing gas delivery pipe for introducing oxygen-enriched air or natural gas.

[0026] It can be understood that by setting the first spray gun assembly 60, the matte or blister copper in the matte controller 20 and the blister copper controller 40 can be insulated or heated; by setting the second spray gun assembly 70, when the copper mass percentage of the matte produced by the smelting furnace 10 is lower than the set value, oxygen-enriched air can be introduced into the melt transportation channel of the first main body through the second spray gun assembly 70 to react with the matte, so as to remove sulfur elements therein and increase the copper mass percentage of the matte. Furthermore, the composition of the matte produced by the smelting furnace 10 can be adjusted in real time through the matte controller 20, avoiding the influence of unqualified smelting products on the next process and ensuring the production stability of the continuous copper smelting process; by setting the third spray gun assembly 80, when the copper mass percentage of the blister copper produced by the converting furnace 30 is lower than the set value, oxygen-enriched air can be introduced into the melt transportation channel of the second main body through the third spray gun assembly 80 to react with the blister copper, so as to remove impurity elements therein and increase the copper mass percentage of the blister copper; or natural gas can be introduced into the melt transportation channel of the second main body through the third spray gun assembly 80 to react with the blister copper, so as to reduce the over-oxidized blister copper and increase the copper mass percentage of the blister copper. Furthermore, the composition of the blister copper produced by the converting furnace 30 can be adjusted in real time through the blister copper controller 40, avoiding the influence of unqualified converting products on the next process and ensuring the production stability of the continuous copper smelting process.

[0027] Further, the smelting device further includes a first flue gas and acid-making system 11 and a slag separation system 12, and both the slag separation system 12 and the first flue gas and acid-making system 11 are connected to the smelting furnace 10.

[0028] Further, the smelting device further includes a second flue gas and acid-making system 31, a slag casting system 32, and a scrap anode breaking system 33, and both the second flue gas and acid-making system 31, the slag casting system 32, and the scrap anode breaking system 33 are connected to the converting furnace 30.

[0029] Further, the smelting device further includes a flue gas and desulfurization system 51, and the flue gas and desulfurization system 51 is connected to the rotary anode furnace 50.

[0030] Further, the volume fraction of oxygen in the oxygen-enriched air introduced by the second spray gun assembly 70 is 40-90%.

[0031] Further, the volume fraction of oxygen in the oxygen-enriched air introduced by the third spray gun assembly 80 is 21-50%.

[0032] In the present utility model, a five-stage smelting process of a smelting furnace 10, a matte controller 20, a converting furnace 30, a blister copper controller 40, and a rotary anode furnace 50 is adopted, and the specific process flow is as follows;

[0033] After proportioning copper concentrate, slag concentrate, soot, lump coal, quartz sand, etc. in the concentrate bin, they are transported to the top feeding port of the smelting furnace 10 through a belt conveyor, react with oxygen-enriched air, and produce matte, slag, flue gas, and dust. Among them, the flue gas and dust enter the first flue gas and sulfuric acid production system 11 for treatment, and the slag enters the slag separation system 11 for recovery;

[0034] Among them, the smelting furnace 10 can introduce oxygen-enriched air from the side or top of the furnace body for smelting reaction. The volume fraction of oxygen in the oxygen-enriched air is 60-90%. Specifically, in this embodiment, the volume fraction of oxygen in the oxygen-enriched air is 80%;

[0035] The matte flows into the matte controller 20 through the matte discharge port of the smelting furnace 10. Natural gas and combustion-supporting air introduced through the first spray gun assembly of the matte controller are used to heat and keep the matte in the matte controller 20 warm;

[0036] Specifically, in this embodiment, the mass percentage of copper in the matte adjusted by the matte controller 20 is 75%, and the temperature of the matte is 1260 °C;

[0037] The matte adjusted by the matte controller 20 flows into the converting furnace 30. At the same time, the crushed anode stubs or cold materials can be added into the furnace through the anode stub crushing system to achieve heat self-balance in the furnace, that is, while processing the matte, the reaction heat is used to melt the cold materials, making full use of the converting reaction heat energy. After reacting with the oxygen-enriched air and flux in the furnace, blister copper, converting slag, flue gas, and dust are produced. Among them, the flue gas and dust enter the second flue gas and sulfuric acid production system 31 for treatment, and the converting slag is cooled and crushed through the slag casting system 32 and then returned to the concentrate bin;

[0038] Among them, the converting furnace 30 can introduce oxygen-enriched air from the side or top of the furnace body for smelting reaction. The volume fraction of oxygen in the oxygen-enriched air is 21-30%. Specifically, in this embodiment, the volume fraction of oxygen in the oxygen-enriched air is 25%;

[0039] The blister copper flows into the blister copper controller 40 through the blister copper discharge port of the converting furnace 30. Natural gas and combustion-supporting air introduced through the first spray gun assembly of the blister copper controller are used to heat and keep the blister copper in the blister copper controller 40 warm;

[0040] Specifically, in this embodiment, the mass percentage of copper in the blister copper adjusted by the blister copper controller 40 is 99%, and the temperature of the blister copper is 1250 °C;

[0041] The adjusted blister copper flows into the rotary anode furnace 50 through the blister copper controller 40, reacts with natural gas, pure oxygen or compressed air to produce anode copper, flue gas and dust. The flue gas and dust enter the flue gas and desulfurization system 51, and the produced anode copper is cast and then electrolyzed.

[0042] It can be understood that by adopting the five-stage smelting process of the smelting furnace 10, matte controller 20, converting furnace 30, blister copper controller 40 and rotary anode furnace 50, the quality of matte produced by smelting and blister copper produced by converting can be adjusted through the matte controller 20 and the blister copper controller 40, realizing the adjustment and control of the important processes of copper smelting, which is beneficial to improving the working condition perception ability and process rectification ability in the copper smelting process, and ensuring the stability of product quality and production continuity.

[0043] Furthermore, the bodies of the matte controller 20 and the blister copper controller 40 are both a rectangular heat-resistant container.

[0044] Furthermore, the smelting furnace 10, the converting furnace 30 and the rotary anode furnace 50 are arranged in a stepped manner from high to low in sequence.

[0045] It can be understood that by arranging the smelting furnace 10, the matte controller 20, the converting furnace 30, the blister copper controller 40 and the rotary anode furnace 50 in a stepped manner from high to low in sequence, the matte, blister copper and anode copper can be configured to flow by gravity from high to low throughout the whole process, avoiding the liquid hoisting of high-temperature melt, the free dispersion of SO2 and the danger of melt hoisting.

[0046] In summary, for the smelting device in the above embodiments of the present utility model, by setting the first spray gun assembly, the matte or blister copper in the matte controller and the blister copper controller can be heated or kept warm through the first spray gun assembly; by setting the second spray gun assembly, when the mass percentage of copper in the matte produced by the smelting furnace is lower than the set value, oxygen-enriched air can be introduced into the melt transportation channel of the first main body through the second spray gun assembly to react with the matte, so as to remove sulfur elements therein and increase the mass percentage of copper in the matte, thereby enabling the composition of the matte produced by the smelting furnace to be adjusted in real time through the matte controller, avoiding the influence of unqualified smelting products on the next process, and ensuring the production stability of the continuous copper smelting process; by setting the third spray gun assembly, when the mass percentage of copper in the blister copper produced by the converting furnace is lower than the set value, oxygen-enriched air can be introduced into the melt transportation channel of the second main body through the third spray gun assembly to react with the blister copper, so as to remove impurity elements therein and increase the mass percentage of copper in the blister copper; or natural gas can be introduced into the melt transportation channel of the second main body through the third spray gun assembly to react with the blister copper, so as to reduce the over-oxidized blister copper and increase the mass percentage of copper in the blister copper, thereby enabling the composition of the blister copper produced by the converting furnace to be adjusted in real time through the blister copper controller, avoiding the influence of unqualified converting products on the next process, and ensuring the production stability of the continuous copper smelting process.

[0047] In the description of this specification, the descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0048] The above embodiments only represent several implementation manners of the present utility model, and the descriptions are relatively specific and detailed, but should not be construed as limiting the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model shall be subject to the appended claims.

Claims

1. A smelting device, characterized in that, The smelting sequence successively includes a smelting furnace, a converting furnace, and a rotary anode furnace. The outlet of the smelting furnace is connected to the inlet of the converting furnace through a matte controller for adjusting the copper mass percentage of the matte produced by the smelting furnace. The outlet of the converting furnace is connected to the inlet of the rotary anode furnace through a blister copper controller for adjusting the copper mass percentage of the blister copper produced by the converting furnace. The matte controller includes a first main body, and the blister copper controller includes a second main body. A first spray gun assembly is provided on both the first main body and the second main body. One end of the first spray gun assembly with a nozzle faces the melt transportation channel in the first main body and the second main body. The end of the first spray gun assembly far from the melt transportation channel is connected to a first blowing gas delivery pipe. The first spray gun assembly adopts a double-layer sleeve structure. The inner layer of the first spray gun assembly is used for introducing natural gas, and the outer layer of the first spray gun assembly is used for introducing combustion-supporting air. A second spray gun assembly is further provided on the first main body. One end of the second spray gun assembly with a nozzle faces the melt transportation channel in the first main body. The end of the second spray gun assembly far from the melt transportation channel is connected to a second blowing gas delivery pipe for introducing oxygen-enriched air. A third spray gun assembly is further provided on the second main body. One end of the third spray gun assembly with a nozzle faces the melt transportation channel in the second main body. The end of the third spray gun assembly far from the melt transportation channel is connected to a third blowing gas delivery pipe for introducing oxygen-enriched air or natural gas.

2. The smelting device according to claim 1, characterized in that, The volume fraction of oxygen in the oxygen-enriched air introduced by the second spray gun assembly is 40 - 90%.

3. The smelting device according to claim 1, characterized in that, The volume fraction of oxygen in the oxygen-enriched air introduced by the third spray gun assembly is 21 - 50%.

4. The smelting device according to claim 1, characterized in that, The smelting device further includes a first flue gas and acid-making system and a slag separation system. Both the slag separation system and the first flue gas and acid-making system are connected to the smelting furnace.

5. The smelting device according to claim 1, characterized in that, The smelting device further includes a second flue gas and acid-making system, a slag casting system, and a scrap anode crushing system. The second flue gas and acid-making system, the slag casting system, and the scrap anode crushing system are all connected to the converting furnace.

6. The smelting device according to claim 1, wherein The smelting device further includes a flue gas and desulfurization system, and the flue gas and desulfurization system is connected to the rotary anode furnace.

7. The smelting device according to claim 1, characterized in that The smelting furnace, the converting furnace, and the rotary anode furnace are arranged in a stepped manner from high to low in sequence.

8. The smelting device according to claim 1, characterized in that, The bodies of the matte controller and the blister copper controller are both a rectangular heat-resistant container.

9. The smelting device according to claim 1, characterized in that, The smelting furnace can introduce oxygen-enriched air from the side or top of the furnace body for smelting reaction. The volume fraction of oxygen in the oxygen-enriched air is 60 - 90%.

10. The smelting device according to claim 1, characterized in that, The converting furnace can introduce oxygen-enriched air from the side or top of the furnace body for smelting reaction. The volume fraction of oxygen in the oxygen-enriched air is 21 - 30%.

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