CN215930528U - Converting equipment and continuous copper smelting equipment - Google Patents

Abstract

The application relates to metallurgical equipment technical field, especially relates to a converting equipment and continuous copper smelting equipment, and wherein, the converting equipment includes: the converting furnace is internally provided with a crude copper layer area and a converting slag layer area which are arranged from bottom to top, and the crude copper layer area is positioned at the bottom of the converting furnace; and the jet gun is arranged on the converting furnace, and is positioned above the converting slag layer. In this application, through setting up the efflux rifle in the top of blowing slag layer district, because the efflux rifle keeps away from the liquation, has avoided contacting with the liquation, consequently the temperature of efflux rifle position is lower to can improve the life of efflux rifle, reach the purpose of practicing thrift the cost.

Description

Converting equipment and continuous copper smelting equipment

Technical Field

The application relates to the technical field of metal smelting, in particular to converting equipment and continuous copper smelting equipment.

Background

At present, the copper smelting technology in the world is developing towards short flow and continuous direction, and the existing converting furnace is provided with a spray gun at the top and provides air or oxygen-enriched air to convert the copper matte. The existing converting top spray gun extends into a hearth from the top of a furnace body, is close to a liquid level, has low jet speed, is inevitably contacted with a molten pool to generate splashing, and is easy to generate loss and blockage. The material of the jet gun is generally a common stainless steel seamless steel pipe, and the jet gun is at the working temperature of about 1300 ℃ for a long time, and the stainless steel can creep at the temperature of over 800 ℃, so that the jet gun can be melted and broken at the temperature, and the jet gun is easy to generate loss under the working condition and has a short service life.

Meanwhile, in order to reduce the replacement frequency of the spray gun, the spray gun is often very long and is provided with a lifting device, the structure is complex, the height of a workshop is increased, and the engineering investment is increased. Meanwhile, the spray gun is frequently worn and replaced, so that the production cost is improved, and the operation rate is influenced. In view of this, the present application proposes a converting apparatus that is capable of increasing the service life of the jet lance.

SUMMERY OF THE UTILITY MODEL

In order to solve or at least partially solve the above technical problem, the present application provides a converting apparatus comprising:

the converting furnace is internally provided with a crude copper layer area and a converting slag layer area which are arranged from bottom to top, and the crude copper layer area is positioned at the bottom of the converting furnace; and the number of the first and second groups,

and the jet gun is arranged on the converting furnace, and is positioned above the slag layer area.

Optionally, the jet lance is arranged in a side wall of the converting furnace, and a distance between a jet orifice of the jet lance and a highest position of the blown slag layer zone is between 500mm and 2000 mm.

Optionally, the jet nozzles of the jet guns are arranged downwards, and the included angle between the jet guns and the side wall of the converting furnace is 30-55 degrees.

Optionally, the jet lance is disposed in a top wall of the converting furnace, and a distance between a jet orifice of the jet lance and a highest position of the blown slag layer zone is between 1500mm and 3000 mm.

Optionally, a copper water jacket is arranged on a side wall or a top wall of the converting furnace, the copper water jacket is detachably connected with the converting furnace, and the jet gun is located in the copper water jacket.

Optionally, the converting furnace is provided with a plurality of copper water jackets, and each copper water jacket is provided with one corresponding jet gun.

Optionally, the jet gun has a main flow channel and an epoxy channel, the main flow channel being of laval construction.

Optionally, the epoxy channel surrounds the periphery of the main flow channel, and the jet gun further has a gas channel between the main flow channel and the epoxy channel.

Optionally, the jet gun further has a water cooling channel, and the water cooling channel is centered on the main flow channel and surrounds the periphery of the epoxy channel.

The application also provides a continuous copper smelting equipment, includes:

the smelting furnace is internally provided with a matte layer area and a smelting slag layer area which are arranged from bottom to top, and is also provided with a matte discharging port which is communicated with the matte layer area;

the converting furnace of the converting equipment is provided with a matte adding port; and the number of the first and second groups,

a connector having a connection passage communicating the matte discharging port with the matte adding port.

In this application, through setting up the efflux rifle in the top of blowing slag layer district, because the efflux rifle keeps away from the liquation, has avoided contacting with the liquation, consequently the temperature of efflux rifle position is lower to can improve the life of efflux rifle, reach the purpose of practicing thrift the cost.

Drawings

In order to more clearly describe the embodiments of the present application, a brief description will be given below of the relevant drawings. It is to be understood that the drawings in the following description are only intended to illustrate some embodiments of the present application, and that a person skilled in the art may also derive from these drawings many other technical features and connections etc. not mentioned herein.

FIG. 1 is a schematic structural view of the continuous copper metallurgy apparatus according to the present application;

FIG. 2 is a schematic diagram of a converting apparatus according to an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of another converting apparatus provided in an embodiment of the present application;

FIG. 4 is a side view of the converting apparatus of FIG. 3 from another perspective;

FIG. 5 is a top plan view of the converting apparatus of FIG. 3;

FIG. 6 is a schematic cut-away view of a jet gun of the converting apparatus of FIG. 1;

FIG. 7 is a schematic graph of the attenuation of a high energy jet and a conventional supersonic jet.

Description of reference numerals:

1. a converting furnace; 11. a crude copper layer area; 12. a blowing slag layer area; 13. a matte adding port; 14. a flux introduction port; 15. a residual anode feed inlet; 16. a blister copper discharge port; 17. a blowing slag discharge port; 18. a flue gas outlet; 19. A copper water jacket; 2. a jet gun; 21. a main flow channel; 22. a gas channel; 23. an epoxy channel; 24. a water-cooling channel; 3. a connecting member; 4. a smelting furnace; 41. a matte layer area; 42. a slag layer zone; 43. a matte discharge port.

Detailed Description

The present application will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1, the present application proposes a converting apparatus and a continuous copper smelting apparatus having the same. The continuous copper smelting equipment comprises a smelting furnace 4, wherein the smelting furnace 4 is used for smelting fed raw materials such as copper concentrate, quartz flux, lump coal and other return materials under smelting conditions to generate copper matte, the copper matte formed after the reaction of the raw materials is discharged into a converting furnace 1 of converting equipment, and the converting furnace 1 is used for converting the copper matte to produce blister copper.

Referring to fig. 2 and 3 in combination, in the embodiment of the present application, the converting apparatus includes a converting furnace 1 and a jet gun 2, the converting furnace 1 has a blister copper layer area 11 and a converting slag layer area 12 arranged from bottom to top, and the blister copper layer area 11 is located at the bottom of the converting furnace 1. The lance 2 is mounted to the converting furnace 1 and the lance 2 is located above the slag layer zone 12.

The converting furnace 1 is used for converting charged raw materials such as matte, lime flux and other return materials under converting conditions to produce blister copper, and discharging the blister copper to the next process. The blister copper formed after the reaction of the raw materials has the highest density and therefore sinks to the bottom of the converting furnace 1, i.e. in the blister copper zone 11. The blowing slag generated in the reaction process has low density and can be positioned above the blister copper, namely positioned in the blowing slag layer area 12. Therefore, the converting furnace 1 is divided into a blister layer zone 11 and a converting slag layer zone 12 which are provided from bottom to top according to the position of the converting reaction product.

The converting furnace 1 is provided with a matte adding port 13, a flux adding port 14, a stub charging port 15, a crude copper discharging port 16, a converting slag discharging port 17 and a flue gas outlet 18. Matte produced by the smelting furnace 4 enters the converting furnace 1 through a matte adding port 13, the flux adding port 14 is used for adding lime flux into the converting furnace 1, and the anode scrap adding port 15 is used for adding anode scrap. The generated blister copper has high specific gravity, sinks at the bottom of the furnace body, can be periodically discharged through a blister copper discharge port 16 in a siphon mode and enters an anode furnace for refining. In addition, the converting slag in the converting process is periodically overflowed through the converting slag discharging port 17. SO-containing products of converting reactions₂The high-temperature flue gas is discharged from the flue gas outlet 18 and is treated in the subsequent process.

The smelting furnace 4 is internally provided with a matte layer area 41 and a smelting slag layer area 42 which are arranged from bottom to top, the smelting furnace 4 is also provided with a matte discharging port 43, and the matte discharging port 43 is communicated with the matte layer area 41. The matte discharge 43 may discharge the matte of the matte layer zone 41 into the converting furnace 1 in a siphonic manner.

The continuous copper smelting equipment also comprises a connecting piece 3, wherein the connecting piece 3 is provided with a connecting channel which is used for communicating the communicating port of the copper matte discharging port 43 with the copper matte adding port 13. Specifically, the connecting member 3 may be in a long strip shape, and is provided with a connecting chute to form a connecting channel. Furthermore, the connecting piece 3 can also be tubular, the inner bore of which forms the connecting channel.

The jet gun 2 adds oxygen-enriched air into the converting furnace 1 by adopting a side blowing or top blowing mode, wherein the oxygen content of the oxygen-enriched air is 21-35% for example.

In the embodiment of the application, a plurality of jet guns 2 can be arranged in the converting furnace 1, and the jet guns 2 with proper quantity can enable materials and oxygen to fully react to generate high-quality blister copper. The number N of the jet guns 2 is determined according to the oxygen consumption required by the reaction, and the specific calculation formula is as follows:

the method comprises the following steps of (1) obtaining a slag by using a single jet gun 2, wherein the slag comprises N × (QCu + QFe + QS + QF)/(qxeta), wherein K is a correction coefficient, the value of the correction coefficient K is within the range of 0.9-1.1, QCu is the theoretical oxygen consumption required by the oxidation reaction of copper elements in slag, QFe is the theoretical oxygen consumption required by the slagging reaction of iron elements in copper matte, QS is the theoretical oxygen consumption required by the reaction of sulfur elements in flue gas, QF is the theoretical oxygen consumption required by the combustion reaction of fuel, q is the air supply quantity of the single jet gun 2, and eta is the oxygen enrichment concentration and is 21-35%.

In the embodiment of this application, through setting up efflux rifle 2 in the top of converting slag blanket district 12, because efflux rifle 2 keeps away from the melt, has avoided contacting with the melt, and the temperature of consequently efflux rifle 2 position is lower to can improve the life of efflux rifle 2, reach the purpose of practicing thrift the cost.

It is worth mentioning that although the examples of the present application are described with reference to copper-containing materials. It will be appreciated by those skilled in the art that the teachings of the present application are equally applicable to the processing and production of other metal-containing materials.

Referring to fig. 6, in one embodiment, the high-energy jet gun 2 is used as the jet gun 2. Specifically, the jet gun 2 has a main flow passage 21 and an epoxy passage 23 located at the periphery of the main flow passage 21, and the main flow passage 21 is of a laval structure. In this embodiment, the main flow channel 21 and the epoxy channel 23 are both used for oxygen-enriched air to enter the converting furnace 1, and the main flow channel 21 adopts a laval structure, i.e., at least part of the main flow channel is arranged in a gradually reducing manner, then the diameter of the main flow channel is unchanged, and then the main flow channel is arranged in a gradually expanding manner. In addition, the epoxy channels 23 may also adopt a laval structure.

The Laval structure can change the speed of the airflow due to the change of the spray cross section area, so that the airflow is accelerated from subsonic speed to sonic speed to supersonic speed. Specifically, when the gas moves in the jet gun 2, the flow velocity is large at the small section and small at the large section, so that the gas flow is accelerated continuously while passing through the tapered position, and when reaching the narrow throat, i.e., the position where the diameter is constant, the flow velocity has exceeded the sonic velocity. While supersonic fluid no longer follows the principle of "large flow velocity at small cross section and small flow velocity at large cross section" when moving, but the opposite is true, and the larger the cross section is, the faster the flow velocity is. Thus, in the diverging position, the velocity of the gas is further accelerated, thus generating a large thrust. Even if the jet gun 2 is not close to the copper water liquid level, the sprayed oxygen-enriched air can pass through the slag blowing layer region 12 and directly reach the crude copper layer to participate in oxidation reaction. Make efflux rifle 2 keep away from the influence of high temperature copper water temperature like this, also can reduce copper water splash to the body of a gun, shorten life.

In one embodiment, the epoxy channel 23 surrounds the periphery of the main flow channel 21. In the present embodiment, the epoxy channel 23 is located at the periphery of the main flow channel 21, which means that the cross section of the epoxy channel 23 may be annular, or a plurality of epoxy channels 23 are provided, and the plurality of epoxy channels 23 are distributed at intervals around the main flow channel 21. The cross section here refers to the surface perpendicular to the gas flow direction.

After entering the jet gun 2, the oxygen is directly split into a coherent jet in the outer epoxy channel 23 and a central main oxygen jet in the middle main channel 21, wherein the central main oxygen jet is a supersonic jet, and the speed of the outer coherent jet can reach the highest sonic speed. Outer layer efflux parcel central main oxygen efflux slows down main oxygen efflux and divergence and decay rate, improves main oxygen efflux jetting distance and to melt liquid level impact strength to improve 2 rifle positions of efflux rifle in smelting production, prolong 2 shower nozzles of efflux rifle life-span, reduction in production cost.

In one embodiment, the spray gun 2 further has a gas channel 22, the gas channel 22 being located between the main flow channel 21 and the epoxy channel 23. In the embodiment, the supersonic speed gas accompanying flow and the oxygen flow surround the supersonic speed main oxygen jet flow to form the super-combustion flame, so that the supersonic speed main oxygen jet flow of the high-temperature high-speed rarefied gas envelope with adjustable temperature and speed is formed, the speed attenuation of the supersonic speed main oxygen jet flow is delayed, the stirring efficiency of a molten pool is improved, the production operation rate is improved, and the production cost is reduced; meanwhile, the position of the converting gun can be improved, the impact capacity of jet flow on a molten pool is not influenced, the consumption of cooling water is reduced, and the service life of the jet flow gun 2 is prolonged.

In one embodiment, the spray gun 2 further has a water cooling channel 24, and the water cooling channel 24 is centered on the main flow channel 21 and surrounds the epoxy channel 23. In this embodiment, the cross section of the water cooling channel 24 may also be annular, or a plurality of water cooling channels 24 may be provided, the plurality of water cooling channels 24 are disposed around the main flow channel 21, and adjacent water cooling channels 24 are disposed at intervals. In this embodiment, the setting of water-cooling channel 24 can let in the circulating water, for efflux rifle 2 itself cools down, improves efflux rifle 2's life.

Optionally, the jet gun 2 includes a nozzle and a copper water jacket sleeved outside the nozzle, a main flow channel 21, a fuel gas channel 22 and an epoxy channel 23 are formed on the nozzle, a water cooling channel 24 is formed in the copper water jacket, and the copper water jacket is detachably connected with the nozzle.

In addition, both the gas channel 22 and the epoxy channel 23 may be provided in a laval structure.

Specifically, the high-energy jet guns 2 can ensure that the oxygen-enriched air can reach supersonic speed after leaving the jet orifice, and the oxygen-enriched air is sprayed into the converting furnace 1, and the air speed of the oxygen-enriched air can exceed 500m/s after leaving each spray gun. The oxygen-enriched air has a violent stirring effect on the melt and has a chemical reaction to finally generate the crude copper with the copper content of 98-99.5%.

The high-energy jet gun 2 has more concentrated energy and can inject into the melt, thereby improving the oxygen utilization rate and reducing splashing. On the basis, the jet gun 2 can be far away from the liquid level of a molten pool, and the adhesion on the jet gun 2 is effectively reduced, so that the consumption of the jet gun 2 is avoided, the production cost is saved, the operation rate is improved, and high-grade high-quality blister copper is produced.

The attenuation of the high-energy jet and the ordinary supersonic jet is shown in fig. 7, and experiments show that compared with the conventional supersonic jet, the high-energy jet gun 2 has longer jet length, more concentrated jet and much lower momentum attenuation than the conventional supersonic jet. The jet flow of the high-energy jet flow gun 2 is injected into the melt in a laser beam-like mode, so that the splashing is small, the penetrating power is strong, and the oxygen utilization rate is higher.

The specific structure of the fluidic gun 2 is described below by way of some examples:

in the first embodiment, the epoxy passage 23 and the gas passage 22 are both annular, the epoxy passage 23 and the gas passage 22 can be respectively provided with an annular gap section, the annular gap section is arranged at one end close to the jet orifice, the width of the annular gap section is integrally narrow, and in the flowing direction of gas, the annular gap section is firstly arranged in a gradually-reduced mode and then arranged in a gradually-expanded mode, so that a laval structure is formed.

In the second embodiment, the epoxy passages 23 and the gas passages 22 are both circular holes, a plurality of gas passages 22 and a plurality of epoxy passages 23 are arranged on the periphery of the main flow passage 21, the plurality of gas passages 22 are circumferentially distributed at intervals along the main flow passage 21, the plurality of epoxy passages 23 are arranged on the periphery of the gas passages 22, and the plurality of epoxy passages 23 are annularly distributed by taking the main flow passage 21 as the center.

In this embodiment, a laval structure may also be provided around the passage and the gas passage 22.

In the third embodiment, the difference between the second embodiment and the first embodiment is that one gas passage 22 of two adjacent gas passages 22 is provided with a laval structure, the other gas passage 22 is not provided with a laval structure, and the other gas passage 22 has a first gas section and a second gas section distributed in the direction of the jet flow, the diameter of the first gas section is constant, the diameter of the second gas section is constant, and the diameter of the first gas section is larger than that of the second gas section.

In the fourth embodiment, the jet gun 2 includes a nozzle body and a plurality of inner sleeves, the nozzle body is provided with an oxygen supply groove and a plurality of mounting holes, and the plurality of mounting holes penetrate through the groove bottom of the oxygen supply groove. The inner sleeves are mounted in the mounting holes, and one inner sleeve is correspondingly mounted in each mounting hole. The inner hole of the inner sleeve is a Laval tube hole, and the aperture of the Laval tube hole is gradually reduced and then gradually increased along the jet flow direction, namely the gas flowing direction. The laval pipe holes can greatly increase the speed of the oxygen-enriched air.

In addition, a plurality of through grooves are formed in the outer wall of the inner sleeve, the through grooves penetrate through the inner sleeve along the jet flow direction, namely the penetrating direction of the through grooves is generally consistent with the inner hole direction of the inner sleeve, the through grooves are also communicated with the oxygen supply grooves, and the through grooves form an epoxy channel 23.

Install interior sleeve pipe in the mounting hole through the mode of assembly, reduced the manufacturing degree of difficulty and cost of maintenance, and be convenient for interior sleeve pipe's change.

In the embodiment of the application, the jet gun 2 can be arranged at any position on the converting furnace 1, and the jet gun 2 is positioned above the converting slag layer, so that the condition that the jet gun 2 is arranged on the side wall or the top wall of the converting furnace 1 is introduced respectively.

Referring to fig. 2 and 6 in combination, in the fifth embodiment, the jet guns 2 are arranged on the side wall of the converting furnace 1, and the distance between the jet ports of the jet guns 2 and the highest position of the converting slag layer zone 12 is 500mm to 2000 mm. Specifically, the distance between the jet ports of the jet guns 2 and the uppermost position of the blown slag layer zone 12 may be 500mm, 1000mm, 2000mm, etc., which can prevent the jet guns 2 from contacting the splashed melt.

Alternatively, the injection ports of the jet guns 2 are arranged downwards, and the angle between the jet guns 2 and the side wall of the converting furnace 1 is 30 ° to 55 °. In this embodiment, the jet orifice is directed downward, and the angle between the jet direction and the sidewall is 30 ° to 55 °, so that the jet lance 2 can jet the oxygen-enriched air obliquely downward to penetrate the upper converting slag. In particular, the angle between the jet lance 2 and the side wall of the converting furnace 1 is 30 °, 36 °, 50 °, 55 °, or the like.

Optionally, a copper water jacket 19 is arranged on the side wall of the converting furnace 1, the copper water jacket 19 is detachably connected with the side wall of the converting furnace, the copper water jacket 19 is positioned above the converting slag layer region 12, and the jet gun 2 is positioned in the copper water jacket 19. In this embodiment, the fact that the jet gun 2 is located in the copper water jacket 19 means that the nozzle of the jet gun 2 is retracted into the copper water jacket 19 and does not extend into the converting furnace 1. In this embodiment, the lance is kept away from the melt level, so that contact between the lance and the melt in the converting furnace 1 can be better avoided.

Referring to fig. 3 to 5, in the sixth embodiment, the jet lance 2 is disposed on the top wall of the converting furnace 1, and the distance between the jet orifice of the jet lance 2 and the highest position of the converting slag layer 12 is 1500mm to 3000mm, such as 1500mm, 1800mm, 2000mm or 3000 mm. In this embodiment, the copper water jacket 19 may be arranged on the top wall, the copper water jacket 19 may be detachably connected to the top wall, the jet gun 2 is located in the copper water jacket 19, and the nozzle of the jet gun 2 is retracted into the copper water jacket 19 and does not extend into the converting furnace 1.

In one embodiment, the converting furnace 1 is provided with a plurality of copper water jackets 19, and each copper water jacket 19 is provided with a corresponding jet gun 2. The arrangement of a plurality of jet guns 2 can provide more oxygen-enriched air simultaneously, is favorable to converting furnace 1 to carry out the converting.

In the embodiment of the application, the arrangement of the copper water jacket 19 can play a cooling effect on the jet gun 2, so that the service life of the jet gun 2 is further prolonged. In the embodiment that the jet flow gun 2 is provided with the water cooling channel 24, the copper water jacket 19 and the water cooling channel 24 simultaneously carry out dual cooling on the jet flow gun 2, after the copper water jacket 19 is cooled, the heat reaching the water cooling channel 24 is obviously reduced, the water cooling channel 24 is cooled, the heat is greatly reduced and is transferred to the interior of the jet flow gun 2, and the service life of the jet flow gun 2 is greatly prolonged.

In the present embodiment, the division of the interior of the converting furnace 1 into the blister layer zone 11 and the converting slag layer zone 12 arranged vertically means that, when the maximum amount of matte allowed by the facility is added, the maximum thickness of the blister layer and the converting slag layer generated is divided into the blister layer zone 11 by the thickness of the blister layer generated in this case, and the thickness of the converting slag layer zone 12 is divided into the thickness of the converting slag layer generated.

Similarly, the division of the interior of the melting furnace 4 into the matte layer region 41 and the slag layer region 42 arranged vertically means that the maximum thickness of the matte layer and the slag layer generated when the maximum amount of raw material allowed by the facility is charged, the matte layer region 41 is divided by the thickness of the matte layer generated in this case, and the thickness of the slag layer region 42 is divided by the thickness of the generated slag layer.

The converting process of the converting furnace 1 will be specifically described below by way of some examples.

In a seventh embodiment, the copper continuous converting method of the present application comprises the steps of:

step S1, adding matte produced by smelting from a matte adding port 13, wherein the grade of the matte is 75%, the adding amount is 45t/h, and continuously adding lime flux from a flux adding port 14 at the top of the converting furnace 1, wherein the using amount of the lime flux is 0.4: 1 the addition is controlled to meet the reaction conditions of the raw materials.

And step S2, calculating the thickness required by the blister copper and the converting slag according to the productivity, and determining the height of the melt zone.

And step S3, arranging the high-energy jet gun 2 on the side wall of the converting furnace 1, wherein the angle between the jet gun 2 and the side wall is 30-55 degrees and the distance between the jet gun 2 and the side wall is 800-1500 mm from the top of the converting slag layer area 12.

And step S4, injecting oxygen-enriched air containing 21-30% of oxygen through the high-energy jet gun 2, injecting the oxygen-enriched air into the melt, and carrying out continuous converting reaction on the furnace burden and the oxygen to generate high-grade blister copper containing not less than 99% of copper and converting slag.

And step S5, the raw copper with high specific gravity sinks at the bottom of the converting furnace 1, is continuously discharged in a siphon mode, and enters an anode furnace for refining.

And step S6, opening the converting slag discharge port 17 on the side wall of the converting furnace 1 every 3-5 hours, discharging the converting slag in an overflow mode, and returning the converting slag to the smelting furnace 4 for secondary smelting after air quenching and cooling.

In this embodiment, the blister copper and the converting slag generated after the converting reaction are naturally layered due to different specific gravities, and the converting slag floats above the melt with a small specific gravity, and is periodically discharged by overflowing through the converting slag discharge port 17, and can be fed into the smelting furnace 4 for secondary smelting after being air-quenched.

In the eighth embodiment, the matte produced by the smelting furnace 4 is fed into the converting furnace 1 through a connecting chute, the matte grade is 75%, the feeding amount is 45t/h, and a lime flux with the CaO content of 40% is continuously fed from a flux feeding port 14 at the top of the converting furnace 1.

The total thickness of the coarse copper layer and the converting slag layer is 1000mm, the high-energy jet gun 2 is arranged at the height of 1500mm away from the upper part of the converting slag layer, the angle between the jet gun 2 and the side wall of the converting furnace 1 is 45 degrees, oxygen-enriched air with 25 percent of oxygen is blown into the high-energy jet gun 2, and the converting temperature is 1200 ℃. After leaving each jet gun 2, the air speed of the oxygen-enriched air reaches 550m/s, the oxygen-enriched air has a violent stirring effect on the melt and reacts with iron and sulfur in the copper matte to generate high-grade blister copper containing 99 percent of copper; the product of the reaction of iron and oxygen, iron oxide, reacts with the lime flux to produce converting slag containing 40% copper.

And continuously discharging the crude copper in a siphon mode, and refining in an anode furnace. And opening a converting slag discharge port 17 of the converting furnace 1 every 3 hours, discharging converting slag in an overflow mode, and returning the converting slag as a return material to the smelting furnace 4 for secondary smelting after air quenching and cooling.

In the ninth embodiment, matte produced by the smelting furnace 4 is fed into the converting furnace 1 through a connecting chute, the matte grade is 75%, the adding amount is 36t/h, and lime flux with the CaO content of 54% is added from a flux adding port 14 at the top of the converting furnace 1.

The total thickness of the coarse copper layer and the converting slag layer is 800mm, the high-energy jet gun 2 is arranged at the height of 1800mm away from the upper part of the converting slag layer, the angle between the jet gun 2 and the side wall of the converting furnace 1 is 35 degrees, oxygen-enriched air with oxygen content of 27 percent is blown in through the high-energy jet gun 2, and the converting temperature is 1200 ℃. The oxygen-enriched air produces a vigorous stirring action on the melt and reacts with the iron and sulfur in the copper matte to produce high-grade blister copper containing 98.8% copper and blown slag containing 36% copper.

And opening a crude copper discharge port 16 by using an oxygen pipe every 5 hours, discharging the crude copper in a siphon mode, and refining the crude copper in an anode furnace. And opening a converting slag discharge port 17 of the converting furnace 1 every 4 hours, discharging converting slag in an overflow mode, and returning the converting slag as a return material to the smelting furnace 4 for secondary smelting after air quenching and cooling.

In the tenth embodiment, matte produced by the smelting furnace 4 is fed into the converting furnace 1 through a connecting chute, the grade of the matte is 75%, the feeding amount is 40/h, and lime flux with the CaO content of 90% is continuously fed from a flux feeding port 14 at the top of the converting furnace 1.

The total thickness of the coarse copper layer and the converting slag layer is 1000mm, a high-energy jet gun 2 is arranged on the top wall of the converting furnace 1, the bottom of the jet gun 2, namely a jet orifice, is 2000mm away from the upper part of the converting slag layer, oxygen-enriched air containing 25% of oxygen is blown into the high-energy jet gun 2, and the converting temperature is 1200 ℃. After leaving each jet gun 2, the air speed of the oxygen-enriched air reaches 550m/s, the oxygen-enriched air has a violent stirring effect on the melt and reacts with iron and sulfur in the copper matte to generate high-grade blister copper containing 99 percent of copper; the product of the reaction of iron and oxygen, iron oxide, reacts with the lime flux to produce converting slag containing 40% copper.

And continuously discharging the crude copper in a siphon mode, and refining in an anode furnace. And opening a converting slag discharge port 17 of the converting furnace 1 every 3 hours, discharging converting slag in an overflow mode, and returning the converting slag as a return material to the smelting furnace 4 for secondary smelting after air quenching and cooling.

Finally, it should be noted that those skilled in the art will appreciate that embodiments of the present application present many technical details for the purpose of enabling the reader to better understand the present application. However, the technical solutions claimed in the claims of the present application can be basically implemented without these technical details and various changes and modifications based on the above-described embodiments. Accordingly, in actual practice, various changes in form and detail may be made to the above-described embodiments without departing from the spirit and scope of the present application.

Claims (10)

1. A converting apparatus, comprising:

the converting furnace is internally provided with a crude copper layer area and a converting slag layer area which are arranged from bottom to top, and the crude copper layer area is positioned at the bottom of the converting furnace; and the number of the first and second groups,

and the jet gun is arranged on the converting furnace, and is positioned above the slag layer area.

2. The converting installation according to claim 1, characterized in that the jet lances are arranged in the side wall of the converting furnace and the distance between the injection orifices of the jet lances and the uppermost position of the slag layer zone is between 500 and 2000 mm.

3. The converting installation according to claim 2, wherein the injection ports of the jet lances are inclined downwards and the angle between the jet lances and the side wall of the converting furnace is 30 ° to 55 °.

4. The converting installation according to claim 1, characterized in that the jet lance is arranged in the top wall of the converting furnace and the distance between the jet orifice of the jet lance and the highest position of the slag layer zone is between 1500mm and 3000 mm.

5. The converting apparatus of claim 1, wherein a copper water jacket is disposed on a side wall or a top wall of the converting furnace, the copper water jacket is detachably connected to the converting furnace, and the jet gun is located in the copper water jacket.

6. The converting apparatus of claim 5, wherein the converting furnace is arranged with a plurality of copper water jackets, one for each of the plurality of water jackets, and one of the plurality of jet guns.

7. The converting apparatus of any of claims 1-6, wherein the jet lance has a main flow channel and an epoxy channel, the main flow channel being of a laval configuration.

8. The converting apparatus of claim 7, wherein the epoxy channel surrounds a periphery of the primary flow channel, the jet lance further having a gas channel between the primary flow channel and the epoxy channel.

9. The converting apparatus of claim 7, wherein the jet lance further has a water-cooled channel centered about the main flow channel and surrounding the periphery of the epoxy channel.

10. A continuous copper smelting equipment is characterized by comprising:

the smelting furnace is internally provided with a matte layer area and a smelting slag layer area which are arranged from bottom to top, and is also provided with a matte discharging port which is communicated with the matte layer area;

the converting apparatus of any one of claims 1 to 9, wherein a converting furnace of the converting apparatus is provided with a matte adding port; and the number of the first and second groups,

a connector having a connection passage communicating the matte discharging port with the matte adding port.

Images