CN210620907U - Rotary electric reduction furnace - Google Patents
Rotary electric reduction furnace Download PDFInfo
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- CN210620907U CN210620907U CN201921230858.1U CN201921230858U CN210620907U CN 210620907 U CN210620907 U CN 210620907U CN 201921230858 U CN201921230858 U CN 201921230858U CN 210620907 U CN210620907 U CN 210620907U
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Abstract
The utility model discloses a rotary reduction electric furnace. The rotary electric reducing furnace comprises: the rotary electric furnace comprises an electric furnace shell, a furnace opening, a chute, a melt discharge opening, a slag discharge opening, a burner and a tuyere, wherein a flue gas area and a melt area are limited in the electric furnace shell from top to bottom, and a slag layer, a sulfonium layer and a metal layer are distributed in the melt area from top to bottom; the furnace mouth is arranged in the smoke area; the chute is arranged in the smoke area in a lifting way; the melt discharge port is arranged on the metal layer; the slag discharge port is arranged on the slag layer; the burner is arranged in the melt zone and positioned at the end part of the electric furnace shell; the tuyere is arranged in the melt zone; the electrode is inserted into the slag layer from the upper part of the electric furnace shell in a lifting way; the driving device drives the rotary electric furnace to rotate. The rotary reduction electric furnace can efficiently process materials such as pyrometallurgical slag, wet leached slag, medium and low-grade metal blocks, smelting soot and the like generated in the non-ferrous metal smelting process and the hazardous waste recycling process.
Description
Technical Field
The utility model belongs to the metallurgical field particularly, relates to a rotation reduction electric stove.
Background
In the non-ferrous smelting process, besides producing valuable metal products, solid wastes or dangerous wastes such as pyrometallurgical slag, wet process leaching slag, medium-low grade metal blocks, smelting soot and the like are often produced simultaneously, and the materials are required to be further pyrogenically treated so as to realize harmless treatment. However, the materials have low valuable metal content, some materials also contain high-melting-point refractory substances, and the requirements on smelting strength and material adaptability of smelting equipment are extremely high. At present, large ore-smelting electric furnaces, dilution electric furnaces, settling electric furnaces and the like in non-ferrous metal smelting have single functions and can only be suitable for certain specific smelting process; meanwhile, the electric furnaces are of fixed structures, smelting dead zones exist at corners, and slag and nodulation are easy to form in the dead zones, so that metal waste is caused to a certain extent; in addition, the traditional reducing electric furnace creates reducing atmosphere by spraying reducing media such as coal powder and the like, reducing agents such as the coal powder and the like are added from the top of the furnace, solid reducing agents can only react with the surface of the melt on the uppermost layer, the reaction dynamic performance is poor, the reducing effect is limited, and the application of the reducing electric furnace is limited to a certain extent. Because the resource of dangerous waste is just rising in recent years, no efficient method for treating the waste generated in the industry exists. Therefore, the treatment method of non-ferrous metal smelting slag and the like is still in need of further improvement.
SUMMERY OF THE UTILITY MODEL
The present invention aims at solving at least one of the technical problems in the related art to a certain extent. Therefore, the utility model aims to provide a rotary reduction electric furnace. The rotary reduction electric furnace can simultaneously treat materials such as pyrometallurgical slag, wet leaching slag, medium-low grade metal blocks, smelting soot and the like, and has the advantages of high reaction speed, high smelting strength, flexible operation, strong raw material adaptability and the like.
According to the first aspect of the utility model, the utility model provides a rotation reduction electric furnace. According to the utility model discloses an embodiment, this rotation reduction electric stove includes:
a rotary electric furnace comprising:
the electric furnace comprises an electric furnace shell, wherein a smoke area and a melt area are limited in the electric furnace shell from top to bottom, and a slag layer, a sulfonium layer and a metal layer are distributed in the melt area from top to bottom;
the furnace mouth is arranged in the smoke area;
the chute is arranged in the smoke area in a lifting manner;
a melt drain opening provided in the metal layer;
the slag discharge port is arranged on the slag layer;
the burner is arranged in the melt zone and positioned at the end part of the electric furnace shell;
the tuyere is arranged in the melt zone;
an electrode liftably inserted into the slag layer from an upper portion of the electric furnace housing;
and the driving device drives the rotary electric furnace to rotate.
According to the rotary electric reduction furnace of the embodiment of the utility model, the rotary electric furnace structure is adopted, so that the occurrence of smelting dead zones can be avoided, the rotary adjustment operation position can be performed, and the flexibility of feeding and operation is improved; meanwhile, the electrode is inserted into the slag layer for heating, so that the slag layer can be heated through electric arc, a large amount of heat is released in the slag layer, a melt with a thick slag layer is heated quickly and efficiently, the heating speed is far higher than that of a burner, and the melt can be driven to stir through eddy current generated by the electric arc; in addition, jet gas can be blown into the melt by utilizing the spray gun through the tuyere, so that the redox atmosphere in the furnace body can be controlled, and the high-efficiency removal of impurity metals in the smelting slag is realized; the melt can also form turbulence to strengthen the reaction among gas, solid and liquid; furthermore, a solid reducing agent can be sprayed into the furnace body by taking gas as a carrier, so that the reducing atmosphere in the furnace body is improved, and the energy consumption is reduced. In conclusion, the rotary electric reducing furnace can efficiently treat solid waste or dangerous waste generated by nonferrous smelting in a large scale, such as pyrometallurgical slag, wet leaching slag, medium-low grade metal blocks, smelting soot and other materials, has the advantages of high reaction speed, high smelting strength, flexible operation, strong adaptability of raw materials and the like, and realizes win-win of economic benefit and environmental benefit.
In addition, the rotary electric reduction furnace according to the above embodiment of the present invention may further have the following additional technical features:
optionally, the rotary electric furnace comprises 1-2 layers of the melt discharge openings.
Optionally, the rotary electric furnace comprises a plurality of said chutes located on one or both sides of the axis of rotation of the furnace housing.
Optionally, the rotary electric furnace comprises a plurality of tuyeres located on one or both sides of the axis of rotation of the furnace housing.
Optionally, the rotary electric reduction furnace further comprises a hydraulic device, the hydraulic device is connected with the electrode and controls the electrode to be inserted into or pulled out of the slag layer.
Optionally, the electrode is perpendicular to the length direction of the furnace housing and its extension intersects the axis of rotation of the furnace housing.
Optionally, the rotary electric reduction furnace comprises a plurality of electrodes which are distributed at intervals along the length direction of the furnace shell.
Optionally, the number of the furnace openings is 1-2, the number of the melt discharge openings is 1-5, the number of the slag discharge openings is 1-5, the number of the slide pipes is 1-10, the number of the air openings is 5-30, and the number of the electrodes is 1-5.
Optionally, a supporting ring is arranged on the electric furnace shell, and the driving device drives the connecting shaft gear to drive the supporting ring to enable the rotary electric furnace to rotate.
Optionally, a water jacket is provided on the electric furnace housing adjacent to the tuyere.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a front view of a rotary electric reduction furnace according to an embodiment of the present invention.
FIG. 2 is a sectional view of a rotary electric reduction furnace according to an embodiment of the present invention.
FIG. 3 is a sectional view of a rotary electric reduction furnace according to still another embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
According to the first aspect of the utility model, the utility model provides a rotation reduction electric furnace. According to an embodiment of the present invention, as shown in fig. 1, the rotary electric reduction furnace includes: a rotary electric furnace 100, an electrode 200 and a driving device 300. The rotary electric furnace 100 comprises an electric furnace shell 110, a furnace mouth 120, a chute 130, a melt discharge port 140, a slag discharge port 150, a burner 160 and an air port 170, wherein a flue gas area 111 and a melt area 112 are defined in the electric furnace shell 110 from top to bottom, and a slag layer, a matte layer and a metal layer are distributed in the melt area 112 from top to bottom; the furnace mouth 120 is arranged in the flue gas area 111; the chute 130 is arranged in the flue gas area 111 in a lifting way; the melt discharge port 140 is provided in the metal layer; the slag discharge port 150 is arranged on the slag layer; the burner 160 is arranged in the melt zone 112 and positioned at the end part of the electric furnace shell 110; the tuyere 170 is provided in the melt zone 112; the electrode 200 is inserted into the slag layer from the upper part of the electric furnace case 110 in a liftable manner; the driving device 300 drives the rotary electric furnace 100 to rotate.
The rotary reduction electric furnace according to the above embodiment of the present invention will be described in detail with reference to fig. 1 to 3.
Rotary electric furnace 100
According to the embodiment of the present invention, the rotary electric furnace 100 comprises an electric furnace housing 110, a furnace mouth 120, a chute 130, a melt discharge port 140, a slag discharge port 150, a burner 160 and an air port 170, wherein a flue gas region 111 and a melt region 112 are defined from top to bottom in the electric furnace housing 110, and a slag layer, a matte layer and a metal layer are distributed in the melt region 112 from top to bottom; the furnace mouth 120 is arranged in the flue gas area 111; the chute 130 is arranged in the flue gas area 111 in a lifting way; the melt discharge port 140 is provided in the metal layer; the slag discharge port 150 is arranged on the slag layer; the burner 160 is arranged in the melt zone 112 and positioned at the end part of the electric furnace shell 110; the tuyere 170 is provided in the melt zone 112. The rotary electric furnace structure can avoid smelting dead zones, and can perform rotary adjustment of operation positions, so that the flexibility of feeding and operation is improved; meanwhile, jet gas can be blown into the melt through the tuyere by utilizing the spray gun, so that the redox atmosphere in the furnace body can be controlled, and the impurity metal in the smelting slag can be efficiently removed; the melt can also form turbulence to strengthen the reaction among gas, solid and liquid; furthermore, a solid reducing agent can be sprayed into the furnace body by taking gas as a carrier, so that the reducing atmosphere in the furnace body is improved, and the energy consumption is reduced.
According to a specific embodiment of the utility model, in the nonferrous smelting process, except producing valuable metal product, often can produce solid waste or hazardous waste such as pyrometallurgical slag, wet process leaching sediment, middle and low grade metal piece, smelting cigarette ash simultaneously, these materials all need further pyrometallurgical treatment, just can realize innoxious processing. However, the valuable metal content of these materials is lower, and some still contain high melting point refractory material, and all require high to the smelting intensity and the material adaptability of smelting equipment, and the utility model discloses the adaptable diversified smelting raw materials of rotation reduction electric furnace of above-mentioned embodiment can handle materials such as pyrometallurgical slag, wet process leached sediment, middle and low grade metal block, smelting cigarette ash simultaneously to have reaction rate fast, smelting intensity is high, flexible operation and raw materials strong adaptability advantage such as strong adaptability, realize economic benefits and environmental benefits's win-win.
According to another embodiment of the present invention, the furnace mouth 120 has two functions of exhausting smoke and adding hot melt and/or bulk cold metal to the rotary electric furnace 100. The furnace mouth 120 can be arranged at the end part or the adjacent end part of the electric furnace shell 110, the number of the furnace mouths 120 can be 1-2, and the furnace mouths can be respectively used for smoke exhaust and charging when two furnace mouths are included.
According to another embodiment of the present invention, a particle material can be added into the rotary electric furnace 100 through the chute 130, wherein the particle material can be a flux, a fuel, a raw material, etc., such as at least one selected from the group consisting of pulverized coal, coke, quartz stone, limestone, sulfidic concentrate, pyrometallurgical slag, wet leaching slag, medium and low grade metal lumps, and smelting soot; further, the particle size of the particulate material may be not greater than 10cm, for example, may be not greater than 8cm or not greater than 5cm, etc., whereby the contact area of the particulate material with the melt may be significantly increased.
According to yet another embodiment of the present invention, the rotary electric furnace 100 may include a plurality of chutes 130, which may be located at one side or both sides of the rotation axis of the electric furnace housing, thereby adding the particulate material into the rotary electric furnace using the plurality of chutes, thereby rapidly dispersing the particulate material in the melt and improving the uniformity of the dispersion; in addition, different chutes can be selected to be added according to the types of the granules. According to a specific example of the present invention, the number of elephant trunk is not particularly limited, and those skilled in the art can select the elephant trunk according to actual needs, for example, the elephant trunk can be 1-10.
According to yet another embodiment of the present invention, the melt discharge port 140 may be located at the bottom or on the side wall of one end of the electric furnace housing 110, and the slag discharge port 150 may be located on the side wall of the electric furnace housing 110 away from one end of the melt discharge port 140. Specifically, the melt discharge ports 140 and the slag discharge ports 150 may be arranged according to the material type and the layering condition of the smelting melt, wherein the rotary electric furnace 100 may include 1-2 layers of melt discharge ports 140, when the rotary electric furnace 100 has only 1 layer of melt discharge ports 140, the melt discharge ports 140 may be distributed at intervals in the horizontal direction, and when 2 layers of melt discharge ports 140 are provided, the melt discharge ports 140 may be distributed at intervals in the horizontal direction and the vertical direction, respectively; the slag discharge openings 150 are spaced apart in the horizontal direction, whereby separation and discharge of the phases can be achieved depending on the composition and stratification of the metal, matte and slag phases in the melt. According to a specific example of the present invention, the number of the melt discharging ports 140 can be 1-5, and the number of the slag discharging ports can be 1-5.
According to another embodiment of the present invention, a solid reducing agent and/or gas may be injected into the melt through the tuyere 170 by using a lance, wherein the solid reducing agent may be sulfide and/or pulverized coal, the gas may be at least one selected from nitrogen, natural gas, air, and compressed gas, and the injection pressure of the lance may be 0.1 to 2 MPa. Therefore, the oxidation-reduction atmosphere of the furnace body can be effectively regulated, the impurity metal in the smelting slag can be efficiently removed, the melt can be stirred by driving the melt through airflow, so that the melt is stirred more violently, and the gas-liquid-solid three-phase reaction is more sufficient; furthermore, the stirring degree of the melt can be effectively controlled by controlling the blowing pressure of the spray gun; in addition, the solid reducing agent is sprayed into the furnace body, so that the reducing atmosphere in the furnace body can be further improved, and the energy consumption is reduced.
According to yet another embodiment of the present invention, the rotary electric furnace 100 may comprise a plurality of tuyeres 170, wherein, as shown in fig. 2, the plurality of tuyeres 170 may be located on both sides of the rotation axis of the furnace housing; or as shown in figure 3, a plurality of tuyeres 170 may be located to one side of the axis of rotation of the furnace housing, preferably with the tuyeres being arranged in a row on each side. Therefore, the solid reducing agent and/or the gas are/is sprayed into the melt through the plurality of air ports 170, so that the solid reducing agent can be rapidly dispersed in the melt, the dispersion effect is improved, the uniform and stable reducing atmosphere in the melt is ensured, the turbulence degree of the melt is more favorably controlled, and the reaction among three phases of gas, solid and liquid is further accelerated. Specifically, the plurality of tuyeres 170 may be provided in the slag layer region, thereby further improving the smelting efficiency; further, a plurality of tuyeres 170 may be spaced apart on the same horizontal plane of the slag layer zone to further improve operability during the reduction smelting process.
According to the utility model discloses a still another embodiment, the position of neighbouring wind gap 170 on electric stove casing 110 can be equipped with the water jacket, and when bubbling solid reducing agent and/or jet gas in the fuse-element and adjusting the redox atmosphere or the fuse-element dynamics performance of reaction, the reaction degree of wind gap and near position is more violent and exothermic more, and wind gap and near position temperature are also relatively higher from this, leads to electric stove shell structure to be destroyed easily, the utility model discloses in set up the water jacket through the position at neighbouring wind gap, can effectively avoid the high temperature of neighbouring wind gap position on the electric stove casing to show the destroyed risk of reduction furnace body structure.
According to another embodiment of the present invention, the burner 160 may be located in the melt zone 112 and at the end of the furnace housing 110, preferably in or near the slag layer. Wherein, the burner 160 is mainly used for supplying heat during the furnace opening.
According to the embodiment of the utility model, in the reduction smelting process, hot melt and/or large cold metal blocks can be added into the rotary electric furnace 100 through the furnace mouth 120, granular materials can be added into the rotary electric furnace 100 through the chute 130, and solid reducing agent and/or gas can be sprayed into the melt through the tuyere 170; in addition, it is possible to discharge the fumes from the furnace mouth 120 and to discharge the metallic, metallurgical and matte phases through the melt discharge port 140 and the slag discharge port 150.
According to an embodiment of the present invention, the electrode 200 is liftably inserted into the slag layer from the upper portion of the electric furnace case 110. Can become the fused material with electric energy conversion heat energy from this, wherein, the rate of heating of electrode is far higher than the nozzle heating, inserts the slag blanket with the one end of electrode in, can heat the slag blanket through electric arc to the vortex that produces through electric arc drives the fuse-element and stirs, and high efficiency heats the thick fuse-element of slag blanket.
According to a specific embodiment of the present invention, the electrode 200 is perpendicular to the length direction of the electric furnace housing 110 and the extension line thereof intersects with the rotation axis of the electric furnace housing 110, thereby enabling the electrode to be vertically inserted into the slag layer or to be extracted, greatly reducing the space environment required by the electrode in the moving process, and significantly reducing the risk that the electrode is damaged in the inserting or extracting process.
According to the utility model discloses a still another embodiment, rotation reduction electric stove can include a plurality of electrodes 200, for example can be for including 1 ~ 5 electrodes, and a plurality of electrodes 200 can be followed electric stove casing 110's length direction interval distribution, not only can make the slag blanket thermally equivalent from this, still are favorable to the heating degree of control electrode pair slag blanket.
According to another specific embodiment of the utility model, the rotary electric reduction furnace can further comprise a hydraulic device, the hydraulic device is connected with the electrode, and the electrode can be controlled by the hydraulic device to insert or extract the slag layer.
Driving device 300
According to the embodiment of the present invention, the rotary electric furnace 100 is driven to rotate by the driving device 300. Specifically, the supporting ring 400 may be disposed on the electric furnace casing, and when the rotary electric furnace needs to be rotated, the driving device drives the coupling gear to further drive the supporting ring to rotate, so as to rotate the rotary electric furnace.
According to a specific embodiment of the utility model, the slag melt can be added into the electric furnace from the furnace mouth through the chute, and the cold medium-low grade metal blocks can be added from the furnace mouth through the hopper; the flux, coke and smelting soot are conveyed to a storage bin through a metering belt and then are added through a chute at the lower part of the storage bin; an electrode inserted into the furnace is inserted into the slag layer, the slag layer is heated through electric arc, and the melt is driven to stir through eddy current generated by the electric arc. During the smelting process, a spray gun is inserted into the tuyere area, and natural gas is sprayed into the furnace to improve the reducing atmosphere of the furnace body and ensure that valuable metals are reduced and enter a metal phase; after the smelting is finished, the generated slag is discharged from a slag discharge port, and the generated different metal melts are discharged from a specific melt discharge port; flue gas generated by smelting enters a second combustion chamber from a furnace mouth for further treatment; when the furnace body has special conditions such as splashing and foam slag overflowing, the electrode can be pulled out through the hydraulic device, and the furnace body is rotated to dump the melt into the emergency slag ladle.
To sum up, in the rotary electric reduction furnace of the above embodiment of the present invention, the rotary electric furnace structure is adopted to avoid the occurrence of smelting dead zones, and to perform rotary adjustment of the operation position, thereby improving the flexibility of feeding and operation; meanwhile, the electrode is inserted into the slag layer for heating, so that the slag layer can be heated through electric arc, a large amount of heat is released in the slag layer, a melt with a thick slag layer is heated quickly and efficiently, the heating speed is far higher than that of a burner, and the melt can be driven to stir through eddy current generated by the electric arc; in addition, jet gas can be blown into the melt by utilizing the spray gun through the tuyere, so that the redox atmosphere in the furnace body can be controlled, and the high-efficiency removal of impurity metals in the smelting slag is realized; the melt can also form turbulence to strengthen the reaction among gas, solid and liquid; furthermore, a solid reducing agent can be sprayed into the furnace body by taking gas as a carrier, so that the reducing atmosphere in the furnace body is improved, and the energy consumption is reduced. In conclusion, the rotary electric reducing furnace can treat solid waste or dangerous waste generated by nonferrous smelting in a large scale, such as pyrometallurgical slag, wet leaching slag, medium-low grade metal blocks, smelting soot and other materials, has the advantages of high reaction speed, high smelting strength, flexible operation, strong adaptability of raw materials and the like, and realizes win-win of economic benefit and environmental benefit.
In order to facilitate understanding of the rotary electric reduction furnace according to the above embodiments of the present invention, a method for reduction smelting using the rotary electric reduction furnace will be described below. According to the utility model discloses an embodiment, this method includes: (1) adding hot melt and/or large cold metal blocks into a rotary electric furnace through a furnace mouth, adding granular materials into the rotary electric furnace through a chute, spraying a solid reducing agent and/or gas into the melt through a tuyere, and inserting an electrode into a slag layer from the upper part of a shell of the electric furnace so as to perform reduction smelting; (2) and discharging smoke from the furnace mouth, and discharging a metal phase, smelting slag and a matte phase through a melt discharge port and a slag discharge port.
According to the utility model discloses a specific embodiment, the granule can be flux, fuel and raw materials etc. for example can be for selecting from at least one in fine coal, coke, quartz, lime stone, sulphide concentrate, pyrometallurgical slag, wet process leaching sediment, well low-grade metal block and smelting cigarette ash, and the particle size of granule can be not more than 10cm, can show the area of contact who increases granule and fuse-element from this, and then accelerates redox reaction rate.
According to a further embodiment of the present invention, the solid reducing agent may be sulfide and/or pulverized coal, and the gas may be at least one selected from nitrogen, natural gas, air and compressed gas. Therefore, the oxidation-reduction atmosphere of the furnace body can be effectively regulated, the impurity metal in the smelting slag can be efficiently removed, the melt can be stirred by driving the melt through airflow, so that the melt is stirred more violently, and the gas-liquid-solid three-phase reaction is more sufficient; furthermore, the stirring degree of the melt can be effectively controlled by controlling the blowing pressure of the spray gun; in addition, the solid reducing agent is sprayed into the furnace body, so that the reducing atmosphere in the furnace body can be further improved, and the energy consumption is reduced.
According to the utility model discloses a still another embodiment, the jetting pressure of spray gun can be for 0.1 ~ 2 MPa. The inventor discovers, if the jetting pressure undersize of spray gun, it is not obvious to the stirring effect of fuse-element, and be not enough fully to blow solid reductant to the fuse-element in, and if the jetting pressure of spray gun is too big, make the fuse-element take place the splash again easily or make the foamy slag spill over, the utility model discloses in be 0.1 ~ 2MPa through the jetting pressure of control spray gun, not only can make the fuse-element have suitable stirring degree, gas-liquid-solid three-phase reaction accelerates, can also avoid appearing the phenomenon that fuse-element splash and foamy slag spill over.
To sum up, the reduction smelting method of the above embodiment of the present invention has at least the following advantages: (1) the occurrence of smelting dead zones can be avoided, the operation position can be rotationally adjusted, and the feeding and operation are flexible; (2) the electrode is inserted into the slag layer for heating, so that the melt with a thicker slag layer can be heated quickly and efficiently; (3) jet gas can be blown into the melt by utilizing the spray gun through the tuyere, so that the redox atmosphere in the furnace body can be controlled, and the high-efficiency removal of impurity metals in the smelting slag is realized; the melt can also form turbulence to strengthen the reaction among gas, solid and liquid; (4) a solid reducing agent can be sprayed into the furnace body by taking gas as a carrier, so that the reducing atmosphere in the furnace body is improved, and the energy consumption is reduced; (5) the method can treat solid waste or dangerous waste generated by nonferrous smelting in a large scale, for example, simultaneously treat materials such as pyrometallurgical slag, wet leaching slag, medium-low grade metal blocks, smelting soot and the like, has the advantages of high reaction speed, high smelting strength, flexible operation, strong adaptability of raw materials and the like, and realizes win-win of economic benefit and environmental benefit.
The invention will now be described with reference to specific examples, which are intended to be illustrative only and not to be limiting in any way.
Example 1
In the rotary reduction electric furnace, the rotary electric furnace is of a cylindrical structure, wherein the rotary electric furnace is provided with two furnace mouths, 1 is used as a smoke outlet, 1 is used as a melt adding inlet, and is simultaneously provided with 2 melt discharging ports and 2 slag discharging ports; 4 slide pipes are arranged at the top of the electric furnace shell and are respectively used for adding limestone, quartz stone, coke and smelting soot, and the particle sizes of the materials are respectively and independently 3-5 cm; 3 electrodes are inserted into the slag layer through the top of the electric furnace shell; the 12 tuyeres are distributed on one side of the rotation axis of the electric furnace shell and are arranged in a line.
Adding hot copper smelting slag into a rotary reduction electric furnace, adding smelting soot, introducing natural gas with the pressure of 0.6MPa into a tuyere during smelting to control the reducing atmosphere of a furnace body, and simultaneously spraying a pulverized coal solid reducing agent to enhance the reduction effect, wherein a smelting melt is divided into a sulfonium layer, a metal layer and a slag layer.
The main technical operating conditions of the reduction smelting method of the embodiment are as follows:
temperature of crude metal: about 1200 to 1300 deg.C
Slag temperature: about 1220 to 1350 DEG C
Blowing in natural gas pressure: 0.1 to 0.5MPa
Flue gas O at furnace mouth2Concentration: 5 to 15 percent
Furnace top negative pressure: -100Pa to-400 Pa
Flue gas temperature: 1200 to 1300 DEG C
The product is as follows: blister and black copper
By-products: smelting slag, flue gas and smoke dust
The main technical and economic indicators of the reduction smelting method of the embodiment are as follows:
crude copper grade: about 75 to 95%
Black copper grade: 35 to 50 percent
Copper content of the slag: about 0.8 to 1.5%
Smoke dust rate: 1 to 3 percent
The direct yield is as follows: about 60 to 96 percent
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (10)
1. A rotary electric reducing furnace, comprising:
a rotary electric furnace comprising:
the electric furnace comprises an electric furnace shell, wherein a smoke area and a melt area are limited in the electric furnace shell from top to bottom, and a slag layer, a sulfonium layer and a metal layer are distributed in the melt area from top to bottom;
the furnace mouth is arranged in the smoke area;
the chute is arranged in the smoke area in a lifting manner;
a melt drain opening provided in the metal layer;
the slag discharge port is arranged on the slag layer;
the burner is arranged in the melt zone and positioned at the end part of the electric furnace shell;
the tuyere is arranged in the melt zone;
an electrode liftably inserted into the slag layer from an upper portion of the electric furnace housing;
and the driving device drives the rotary electric furnace to rotate.
2. The rotary electric reducing furnace according to claim 1, comprising 1-2 layers of the melt discharge openings.
3. Rotary electric reduction furnace according to claim 1 or 2, comprising a plurality of said chutes located on one or both sides of the furnace housing rotation axis.
4. The rotary electric reduction furnace according to claim 3, comprising a plurality of tuyeres located on one or both sides of the axis of rotation of the furnace housing.
5. The rotary electric reducing furnace according to claim 1 or 4, further comprising a hydraulic device connected to the electrode and controlling the electrode to insert or extract the slag layer.
6. The rotary electric reduction furnace according to claim 5, wherein the electrodes are perpendicular to the length direction of the furnace casing and the extension lines thereof intersect with the rotation axis of the furnace casing.
7. The rotary electric reduction furnace according to claim 1 or 6, comprising a plurality of said electrodes spaced along the length of the furnace housing.
8. The rotary electric reducing furnace according to claim 7, wherein the number of the furnace openings is 1-2, the number of the melt discharge openings is 1-5, the number of the slag discharge openings is 1-5, the number of the chute is 1-10, the number of the tuyere is 5-30, and the number of the electrode is 1-5.
9. The rotary electric reducing furnace as claimed in claim 1 or 8, wherein a supporting ring is arranged on the furnace shell, and the driving device drives a coupling gear to drive the supporting ring to rotate the rotary electric furnace.
10. The rotary electric reducing furnace according to claim 9, wherein a water jacket is provided on the furnace housing adjacent to the tuyere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921230858.1U CN210620907U (en) | 2019-07-31 | 2019-07-31 | Rotary electric reduction furnace |
Applications Claiming Priority (1)
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