CN111961880A - Method for producing metallized nickel anode plate by using bottom blowing furnace - Google Patents
Method for producing metallized nickel anode plate by using bottom blowing furnace Download PDFInfo
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- CN111961880A CN111961880A CN202010737933.4A CN202010737933A CN111961880A CN 111961880 A CN111961880 A CN 111961880A CN 202010737933 A CN202010737933 A CN 202010737933A CN 111961880 A CN111961880 A CN 111961880A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B23/00—Obtaining nickel or cobalt
- C22B23/02—Obtaining nickel or cobalt by dry processes
- C22B23/025—Obtaining nickel or cobalt by dry processes with formation of a matte or by matte refining or converting into nickel or cobalt, e.g. by the Oxford process
Abstract
The invention discloses a method for producing a metallized nickel anode plate by using a bottom blowing furnace, which comprises the following steps: preparing a mixed material, wherein the mixed material comprises secondary nickel concentrate and coal material; adding the mixed material into a furnace body of the bottom blowing furnace; supplying fuel and oxygen-enriched gas into the furnace body from the bottom of the bottom-blowing furnace to stir a molten pool in the furnace body to complete a secondary nickel concentrate melting and desulfurization process, thereby producing nickel matte and slag; the nickel matte is continuously discharged from the furnace body, and the slag is discontinuously discharged from the furnace body; and casting the nickel matte discharged from the furnace body into a metallized nickel anode plate by a casting machine. The method for producing the metallized nickel anode plate by using the bottom blowing furnace improves the metallization degree of nickel matte, improves the plate forming rate of the metallized nickel anode plate and reduces the amount of returned materials.
Description
Technical Field
The invention relates to the technical field of production of metallized nickel anode plates, in particular to a method for producing a metallized nickel anode plate by using a bottom blowing furnace.
Background
In the related technology, in the process of producing the metallized nickel anode plate, a reverberatory furnace is adopted for secondary nickel concentrate casting, the hearth of the reverberatory furnace is divided into a melting zone and a liquid storage tank, raw materials are fed into the melting zone, melted liquid flows into the liquid storage tank, the liquid storage tank is provided with a discharge port, and the liquid is discharged periodically for casting. The reverberatory furnace uses pulverized coal as fuel and oxygen-enriched air for combustion, three pulverized coal burners are arranged at the end part of the reverberatory furnace, the pulverized coal is fed into the pulverized coal burner by primary air through a coal feeding metering device under a receiving bin, and simultaneously oxygen-enriched air preheated to 250 ℃ is connected into the pulverized coal burner. The coal powder is burnt in the furnace, the furnace temperature is up to 1200 ℃, the secondary nickel concentrate is melted in the furnace, and the melted high nickel matte is discharged through a nickel matte discharging port.
However, the metallized nickel anode plate produced by the reverberatory furnace has high S content of nickel matte and low metallization degree of the anode plate, so that the metallized nickel anode plate is brittle and fragile, and the plate yield of the metallized nickel anode plate is low. Meanwhile, the reverberatory furnace has low fuel utilization rate, large fuel consumption and short service life, so the reverberatory furnace has high production cost for treating secondary nickel concentrate. In addition, the production environment of the reverberatory furnace is relatively harsh.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the embodiment of the invention provides a method for producing a metallized nickel anode plate by using a bottom blowing furnace, which improves the metallization degree of nickel matte, improves the plate forming rate of the metallized nickel anode plate and reduces the amount of returned materials.
The method for producing the metallized nickel anode plate by using the bottom blowing furnace comprises the following steps: preparing a mixed material, wherein the mixed material comprises secondary nickel concentrate and coal material; adding the mixed material into a furnace body of the bottom blowing furnace; supplying fuel and oxygen-enriched gas into the furnace body from the bottom of the bottom-blowing furnace to stir a molten pool in the furnace body to complete a secondary nickel concentrate melting and desulfurization process, thereby producing nickel matte and slag; the nickel matte is continuously discharged from the furnace body, and the slag is discontinuously discharged from the furnace body; and casting the nickel matte discharged from the furnace body into a metallized nickel anode plate by a casting machine.
According to the metallized nickel anode plate obtained by the method for producing the metallized nickel anode plate by using the bottom blowing furnace, disclosed by the embodiment of the invention, the S content of nickel matte in the metallized nickel anode plate is low, the metallization degree is high, the plate forming rate of the cast metallized nickel anode plate is high, and the material return quantity is small.
In some embodiments, coal is continuously added into the furnace body during the melting and desulfurization of the secondary nickel concentrate, and nickel oxide generated in the desulfurization process is reduced in real time to generate metallic nickel.
In some embodiments, flue gas is generated in the furnace body, the temperature of the flue gas discharged out of the furnace body is 1200-1250 ℃, and the flue gas is treated by a waste heat boiler after waste heat is recovered.
In some embodiments, the secondary nickel concentrate is produced by smelting copper-nickel concentrate to produce low-nickel matte, the low-nickel matte is blown by a converter to obtain high-nickel matte, and the high-nickel matte is subjected to slow cooling, crushing and mineral separation to obtain the high-nickel matte.
In some embodiments, the mixed feed further comprises a metallized nickel return.
In some embodiments, the oxygen-enriched gas has an oxygen concentration of 50% to 90%.
In some embodiments, the temperature within the furnace is 1180 ℃ to 1250 ℃ as the nickel matte is continuously discharged from the furnace.
In some embodiments, the temperature of the furnace body is from 1200 ℃ to 1250 ℃ as the slag is intermittently tapped from the furnace body.
In some embodiments, the bottom blowing furnace comprises: the furnace body is provided with a feed inlet and an air jet, the feed inlet is arranged at the top of the furnace body, the mixed material is added into the furnace body through the feed inlet, and the air jet is arranged at the bottom of the furnace body; a gas injection device mounted on the furnace body through the gas injection port for supplying the fuel and oxygen-enriched gas into the furnace body; the heating device is arranged at the end part of the furnace body and is used for baking the furnace body and heating and insulating the mixed material; the discharging device comprises a first discharging port, a second discharging port and a third discharging port, the first discharging port is used for discharging nickel matte in the furnace body, the second discharging port is used for discharging slag in the furnace body, and the third discharging port is used for discharging flue gas generated in the furnace body.
In some embodiments, the bottom-blowing furnace further comprises a supporting device, the supporting device comprises a first carrier roller assembly and a second carrier roller assembly, the first carrier roller assembly and the second carrier roller assembly are arranged at intervals left and right along the transverse direction of the furnace body, and the first carrier roller assembly and the second carrier roller assembly are used for supporting the furnace body and driving the furnace body to rotate around the transverse central axis of the furnace body.
Drawings
Fig. 1 is a schematic structural view of a bottom-blowing furnace according to an embodiment of the present invention.
Figure 2 is a left side view of the bottom blowing furnace of figure 1.
Reference numerals:
the device comprises a furnace body 10, a feeding port 11, an air injection port 12, a liquid level line 13, a first combustion port 14, a second combustion port 15, a detection port 16, an air injection device 20, a heating device 30, a first combustion burner 31, a second combustion burner 32, a discharge device 40, a first discharge port 41, a second discharge port 42, a third discharge port 43, a detection device 50, a supporting device 60, a first carrier roller assembly 61 and a second carrier roller assembly 62.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
As shown in fig. 1, the method for producing a metallized nickel anode plate by using a bottom blowing furnace according to the embodiment of the invention comprises the following steps: preparing a mixed material, wherein the mixed material comprises secondary nickel concentrate and a coal material; adding the mixed material into a furnace body 10 of a bottom blowing furnace; supplying fuel and oxygen-enriched gas into the furnace body 10 from the bottom of the bottom blowing furnace to stir a molten pool in the furnace body 10 to complete the melting and desulfurization processes of secondary nickel concentrate, thereby producing nickel matte and slag; the nickel matte is continuously discharged from the furnace body 10, and the slag is discontinuously discharged from the furnace body 10; the nickel matte discharged from the furnace 10 is cast into a metallized nickel anode plate by a casting machine.
According to the metallized nickel anode plate obtained by the method for producing the metallized nickel anode plate by using the bottom blowing furnace, disclosed by the embodiment of the invention, the nickel matte in the metallized nickel anode plate is low in S content and high in metallization degree, and the cast metallized nickel anode plate is high in plate forming rate and low in material return quantity.
In some embodiments, coal is continuously added to the furnace 10 during the melting and desulfurization of the secondary nickel concentrate, and the nickel oxide formed during the desulfurization is reduced in real time to form metallic nickel. Therefore, the coal material is continuously added in the production process, the nickel oxide generated in the desulfurization process is reduced in real time to generate the metallic nickel, the generation of the metallic nickel is promoted, the metallization degree of nickel matte is improved, and the cast anode plate has high plate forming rate and small material return amount.
In some embodiments, flue gas is generated in the furnace body 10, the temperature of the flue gas when the flue gas is discharged out of the furnace body 10 is 1200-1250 ℃, and the flue gas is treated by a waste heat boiler after waste heat is recovered.
In some embodiments, the secondary nickel concentrate is obtained by smelting copper-nickel concentrate to produce low-nickel matte, blowing the low-nickel matte through a converter to obtain high-nickel matte, and slowly cooling, crushing and concentrating the high-nickel matte.
In some embodiments, the mixed material further comprises a metalized nickel return material, so that the metalized nickel return material can be fully recycled, and the metal recovery rate is improved.
In some embodiments, the oxygen-enriched gas has an oxygen concentration of 50% to 90%, thereby greatly improving the oxygen supply efficiency, increasing the smelting temperature and effectively reducing the amount of flue gas.
In some embodiments, the temperature in furnace 10 is 1180 ℃ to 1250 ℃ as the nickel matte is continuously discharged from furnace 10.
In some embodiments, the temperature in furnace 10 is from 1200 ℃ to 1250 ℃ when slag is intermittently tapped from furnace 10.
In some embodiments, as shown in fig. 1, the bottom-blowing furnace includes a furnace body 10, a gas injection device 20, a heating device 30, and a discharge device 40.
A gas injection means 20 is installed on the furnace body 10 through the gas injection port 12 for supplying the fuel and the oxygen-enriched gas into the furnace body 10. As shown in fig. 1, the number of the gas injection devices 20 is plural, the gas injection devices 20 are disposed in one-to-one correspondence with the gas injection ports 12, and the gas injection devices 20 communicate with the gas injection ports 12 and feed gas and fuel into the furnace body 10.
The heating device 30 is arranged at the end of the furnace body 10 and used for baking the furnace body 10 and heating and insulating the mixed material. As shown in fig. 1, the number of the heating devices 30 is 2, and 2 heating devices 30 are respectively provided on 2 ends of the furnace body 10.
The discharge device 40 includes a first discharge port 41 for discharging nickel matte in the furnace body 10, a second discharge port 42 for discharging slag in the furnace body 10, and a third discharge port 43 for discharging flue gas generated in the furnace body 10. As shown in FIG. 1, a first discharge port 41 is provided at the bottom of the left end portion of the furnace body 10, a second discharge port 42 is provided at the middle of the right end portion of the furnace body 10, and a third discharge port 43 is provided at the top of the furnace body 10.
In some embodiments, the bottom of the bottom blowing furnace is provided with the gas injection device 20, fuel and oxygen-enriched gas are blown into the bottom blowing furnace from the gas injection device 20, the melting and desulfurization processes of the secondary nickel concentrate are completed through strong stirring, and the desulfurization reaction heat can supplement heat for the melting process of the secondary nickel concentrate, so that fuel is saved. The bottom blowing furnace improves the metallization degree of nickel matte, improves the yield of the metallized nickel anode plate and reduces the return amount of metallized nickel. Simultaneously, this bottom blowing stove leakproofness is better, can effectively prevent the flue gas exorbitant, and unorganized flue gas environmental protection is up to standard, has solved the abominable problem of production environment.
In some embodiments, the bottom-blowing furnace further comprises a supporting device 60, the supporting device 60 comprises a first idler assembly 61 and a second idler assembly 62, the first idler assembly 61 and the second idler assembly 62 are arranged at intervals left and right along the transverse direction of the furnace body 10, and the first idler assembly 61 and the second idler assembly 62 are used for supporting the furnace body 10 and simultaneously driving the furnace body 10 to rotate around the longitudinal central axis thereof.
As shown in fig. 1, the first idler assembly 61 is disposed adjacent to the left end of the furnace body 10, the second idler assembly 62 is disposed adjacent to the right end of the furnace body 10, and the furnace body 10 is supported on the first idler assembly 61 and the second idler assembly 62. The first carrier roller assembly 61 is connected with a motor, and the motor is used for driving the first carrier roller assembly 61 to further drive the furnace body 10 to rotate around the transverse central axis of the furnace body.
In some embodiments, the extension of the central axis of the feed port 11 and the extension of the central axis of the gas injection port 12 are not collinear. As shown in figure 1, the furnace body 10 is horizontally arranged, the feed opening 11 and the gas jet 12 are arranged in a staggered manner in the up-down direction, so that the situation that gas fed from the gas jet 12 directly rushes into the feed opening 11 is avoided, the situation that nickel matte generated in the furnace body 10 cannot directly rush into the feed opening 11 under the driving of gas is ensured, and the production process is safer.
In some embodiments, the third discharge port 43 is provided at the top of the furnace body 10, and an extension of a central axis of the third discharge port 43 and an extension of a central axis of the gas ejection port 12 are not collinear. As shown in fig. 1, the third discharge port 43 is provided at the top of the furnace body 10 near the end of the furnace body 10. The furnace body 10 is horizontally arranged, the third discharge port 43 and the gas injection port 12 are arranged in a staggered mode in the vertical direction, gas fed from the gas injection port 12 is prevented from directly rushing into the third discharge port 43, and the production process is safer.
In some embodiments, the furnace body 10 further comprises a first burner port 14, the heating device 30 comprises a first combustion burner 31, and the first combustion burner 31 is mounted on the furnace body 10 through the first burner port 14 for heating and keeping the mixture and baking the furnace body 10. As shown in fig. 1, the first combustion port 14 is arranged at the left end of the furnace body 10, the first combustion burner 31 is installed in the first combustion port 14, and the outlet direction of the first combustion burner 31 points to the central position in the furnace body 10, so that the first combustion burner 31 can directly heat the material in the furnace body and the material in the furnace, and the heating efficiency is improved.
In some embodiments, the furnace body 10 further comprises a second combustion port 15, the second combustion port 15 and the first combustion port 14 are oppositely arranged in the transverse direction of the furnace body 10, and the heating device 30 further comprises a second combustion burner 32, the second combustion burner 32 is used for cooperating with the first combustion nozzle 31 to perform the functions of baking the furnace body 10 and heating and insulating the mixed material.
As shown in fig. 1, the second burner ports 15 are provided at the right end portion of the furnace body 10, and the second burner ports 15 and the first burner ports 14 are provided at both ends of the furnace body 10 to heat the central portion of the inside of the furnace body 10 together. The second combustion burner 32 is installed in the second combustion port 15, and the outlet direction of the second combustion burner 32 points to the central position in the furnace body 10, so that the second combustion burner 32 can directly heat the interior of the furnace body 10 and the mixed material, and the heating efficiency is improved.
The second burner ports 15 and the first burner ports 14 are oppositely arranged in the lateral direction of the furnace body 10, and the burner ports of the second burner ports 15 and the first burner ports 14 are directed toward the center of the bottom of the furnace body 10 in the lateral direction.
In some embodiments, the furnace body 10 further comprises a detection port 16, the detection port 16 is disposed at the top of the furnace body 10, and the bottom-blowing furnace further comprises a detection device 50, wherein the detection device 50 detects the reaction condition of the material in the furnace body 10 through the detection port 16.
As shown in figure 1, the bottom blowing furnace, the material is fed through the feed inlet 11, the material is composed of secondary nickel concentrate, coal material and the return material of the metallized nickel anode plate, the gas injection device 20 is started to feed fuel and oxygen-enriched gas into the furnace body 10, the gas stirs the melt to complete the melting process and the desulfurization process of the secondary nickel concentrate, thereby generating nickel matte and slag.
In some embodiments, as shown in FIG. 1, the furnace body 10 has a transverse central axis substantially parallel to the horizontal direction, and the furnace body 10 has a longitudinal cross-section with a substantially circular outer peripheral profile.
The method for producing the metallized nickel anode plate by using the bottom blowing furnace comprises the following steps:
preparing a mixed material, wherein the mixed material comprises secondary nickel concentrate, coal material and metallized nickel return material. The secondary nickel concentrate is obtained by smelting copper-nickel concentrate to generate low-nickel matte, blowing the low-nickel matte through a converter to obtain high-nickel matte, and slowly cooling, crushing and ore dressing the high-nickel matte.
The mixed material is added into the furnace body 10 of the bottom blowing furnace. And a rubber belt conveyor is arranged on the feed opening 11 at the top of the furnace body 10 and transports the mixed material to the feed opening 11. Therefore, safety accidents are avoided. Specifically, the charging port 11 is of a water jacket structure.
The height of the liquid level in the molten bath is the liquid level line 13, and the height of the liquid level line 13 is basically consistent with the height of the second discharge port 42. The heating device 30 provides heat for the furnace body 10 for baking and the heating and heat preservation of the mixed materials.
Fuel and oxygen-enriched gas are supplied into the furnace body 10 through the gas injection device 20 to stir the molten pool to complete the melting and desulfurization processes of the secondary nickel concentrate, thereby generating nickel matte and slag. The gas injection device 20 injects fuel and oxygen-enriched gas into the furnace body 10 through the gas injection ports 12: wherein the fuel combustion provides heat for the melting of the secondary nickel concentrate; the oxygen-enriched gas is fully contacted with the material and further stirred, so that the material desulfurization reaction is fully carried out, and the nickel matte with lower sulfur content is generated. In the process of melting and reducing the secondary nickel concentrate, coal materials are continuously added into the furnace body 10 to inhibit the generation of nickel oxide in the process of desulfurization, improve the metallization degree of nickel matte, improve the quality of an anode plate and reduce the material return rate.
Wherein: the desulfurization reaction formula is as follows: ni3S2+O2＝NiO+SO2The reduction reaction formula is: NiO + C ═ Ni + CO.
The nickel matte is continuously discharged from the furnace body 10, the slag is intermittently discharged from the furnace body 10, and the nickel matte discharged from the furnace body 10 is cast into a metallized nickel anode plate by a casting machine. Preferably, the nickel matte is discharged through a first discharge opening 41, the first discharge opening 41 being provided as a siphon opening. The slag is discharged through the second discharge port 42, and the second discharge port 42 has a copper water jacket structure.
Wherein the nickel matte and the smelting slag are layered in the furnace, and the thickness of the slag layer is 100mm-200 mm. The nickel matte is continuously siphoned out from the first discharge port and is continuously cast into an anode plate by a casting machine, and the slag is intermittently discharged from the second discharge port.
In some embodiments, coal is continuously added to the furnace 10 through the feed port during the melting and desulfurization of the secondary nickel concentrate. Therefore, the coal material is continuously added in the production process, the generation of nickel oxide is inhibited, the generation of metal nickel is promoted, the metallization degree of nickel matte is improved, and the cast anode plate has high plate forming rate and small material return amount.
The method for producing the metallized nickel anode plate by using the bottom blowing furnace has the following beneficial effects:
(1) in the invention, fuel and oxygen-enriched gas are blown into the bottom blowing furnace through the gas nozzle at the bottom of the furnace body, so that the molten pool is vigorously stirred, the fuel, the blowing air and the nickel matte quickly react to complete the melting and the desulfurization processes of secondary nickel concentrate, and the chemical reaction heat generated in the desulfurization process can supplement heat for the melting process, thereby overcoming the problems of large fuel consumption and low heat efficiency of the reverberatory furnace.
(2) The smelting process adopts thin slag layer operation, lump coal is continuously added from a charging hole above a bottom blowing furnace in production, nickel oxide generated in the desulfurization process is reduced in real time to generate metallic nickel, the metallization degree of nickel matte is improved, the quality of an anode plate is improved, and the material return rate is reduced.
(3) The nickel matte is continuously discharged by siphoning and is continuously cast, and the production efficiency is high.
(4) The bottom blowing furnace has better sealing performance, adopts negative pressure operation in production, can effectively prevent the flue gas from escaping, has the unorganized flue gas environment-friendly standard, and solves the problem of severe production environment.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A method for producing a metallized nickel anode plate by using a bottom blowing furnace is characterized by comprising the following steps:
preparing a mixed material, wherein the mixed material comprises secondary nickel concentrate and coal material;
adding the mixed material into a furnace body of the bottom blowing furnace;
supplying fuel and oxygen-enriched gas into the furnace body from the bottom of the bottom-blowing furnace to stir a molten pool in the furnace body to complete a secondary nickel concentrate melting and desulfurization process, thereby producing nickel matte and slag;
the nickel matte is continuously discharged from the furnace body, and the slag is discontinuously discharged from the furnace body;
and casting the nickel matte discharged from the furnace body into a metallized nickel anode plate by a casting machine.
2. The method for producing the metallized nickel anode plate by using the bottom-blowing furnace as claimed in claim 1, wherein coal is continuously added into the furnace body during the melting and the desulfurization of the secondary nickel concentrate, and nickel oxide generated in the desulfurization is reduced in real time to generate metallic nickel.
3. The method for producing the metallized nickel anode plate by using the bottom-blowing furnace according to claim 1, wherein flue gas is generated in the furnace body, the temperature of the flue gas discharged out of the furnace body is 1200-1250 ℃, and the flue gas is treated by a desulfurization system after waste heat is recovered by a waste heat boiler.
4. The method for producing the metallized nickel anode plate by using the bottom blowing furnace according to the claim 1, characterized in that the secondary nickel concentrate is produced by smelting copper nickel concentrate, the low nickel matte is blown by the converter to obtain high nickel matte, and the high nickel matte is slowly cooled, crushed and beneficiated.
5. The method for producing a metallized nickel anode plate using a bottom-blowing furnace of claim 1, wherein the mixed feed further comprises a metallized nickel return.
6. The method for producing a metallized nickel anode plate using a bottom-blowing furnace as claimed in claim 1, wherein the oxygen-enriched gas has an oxygen concentration of 50% to 90%.
7. The method for producing the metallized nickel anode plate by using the bottom-blowing furnace according to claim 1, wherein the temperature in the furnace body is 1180 ℃ to 1250 ℃ when the nickel matte is continuously discharged from the furnace body.
8. The method for producing the metallized nickel anode plate by using the bottom-blowing furnace according to claim 1, wherein the temperature in the furnace body is 1200 ℃ to 1250 ℃ when the slag is intermittently discharged from the furnace body.
9. The method for producing a metallized nickel anode plate using a bottom-blowing furnace according to any one of claims 1 to 8, wherein the bottom-blowing furnace comprises:
the furnace body is provided with a feed inlet and an air jet, the feed inlet is arranged at the top of the furnace body, the mixed material is added into the furnace body through the feed inlet, and the air jet is arranged at the bottom of the furnace body;
a gas injection device mounted on the furnace body through the gas injection port for supplying the fuel and oxygen-enriched gas into the furnace body;
the heating device is arranged at the end part of the furnace body and is used for baking the furnace body and heating and insulating the mixed material;
the discharging device comprises a first discharging port, a second discharging port and a third discharging port, the first discharging port is used for discharging nickel matte in the furnace body, the second discharging port is used for discharging slag in the furnace body, and the third discharging port is used for discharging flue gas generated in the furnace body.
10. The method for producing the metallized nickel anode plate by using the bottom-blowing furnace according to claim 9, wherein the bottom-blowing furnace further comprises a supporting device, the supporting device comprises a first carrier roller assembly and a second carrier roller assembly, the first carrier roller assembly and the second carrier roller assembly are arranged at intervals left and right along the transverse direction of the furnace body, and the first carrier roller assembly and the second carrier roller assembly are used for supporting the furnace body and driving the furnace body to rotate around the transverse central axis of the furnace body.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115852166A (en) * | 2022-12-28 | 2023-03-28 | 金川集团股份有限公司 | Method for oxygen-enriched smelting of metallized nickel matte from nickel concentrate |
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| CN115852166A (en) * | 2022-12-28 | 2023-03-28 | 金川集团股份有限公司 | Method for oxygen-enriched smelting of metallized nickel matte from nickel concentrate |
| CN115852166B (en) * | 2022-12-28 | 2023-11-21 | 金川集团股份有限公司 | Method for smelting metallized nickel matte through nickel concentrate oxygen enrichment |
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