A metallurgical melt immersion centrifugal high-temperature online separation device, method and use

Abstract

The present invention belongs to the field of metallurgical melt processing technology, specifically a metallurgical melt immersion centrifugal high-temperature online separation device, method and use, wherein a separator is driven by a support arm to be immersed in a high-temperature molten pool for centrifugal rotation, the liquid phase is automatically discharged from the separator, the solid phase is collected in the separator, and the solid-liquid mixed metallurgical melt continues to enter the separator for centrifugal separation; after centrifugal separation, the separator is driven by a support arm to be pulled out of the molten pool, rotated horizontally, and lowered into the slag removal cylinder, and the separator shell is detached at the same time, the centrifugal rotation is started, and the solid phase is discharged. The equipment of the present invention is simple, has high separation efficiency, a high degree of automation, and can realize online separation. It can be applied to the fields of high-temperature online impurity removal of metal melts, high-temperature online removal of metal smelting slag, and high-temperature online separation and recovery of metallurgical slag.

Description

Technical Field

[0001] The present invention relates to the technical field of metallurgical melt processing, and in particular to a metallurgical melt immersion centrifugal high-temperature online separation device, method and application. Background Art

[0002] Non-ferrous metal ores are generally polymetallic ores. Pyrometallurgical smelting produces a mixed solution of multiple metals. To separate these metals, a combination of techniques, such as crystallization, distillation, and electrolytic separation, is currently used. Crystallization separation involves the precipitation of different metal or alloy particles within different temperature ranges during the cooling process. These primary crystals remain suspended in the molten metal and, when they grow to a certain size, rise to the surface or sink to the bottom. For example, in lead smelting, crude lead contains a large amount of various metals, such as Cu, As, Sb, and Sn. During the cooling and crystallization process, these different metals gradually precipitate and rise to the surface of the crude lead melt, forming a scum. Currently, scum removal from the crude lead surface is typically done manually or robotically. This process is complex, inefficient, and labor-intensive. Furthermore, the scum carries a significant amount of lead metal, resulting in significant waste and environmental pollution. Non-ferrous metal smelting often uses electrolysis to purify the target molten metal. Taking zinc metal as an example, zinc concentrate undergoes neutral leaching, purification, and electrolysis to produce cathode zinc flakes. Although the zinc flakes' chemical composition meets the standards, their physical specifications do not meet the requirements, and transportation and storage are inconvenient. Therefore, the cathode zinc flakes must be melted and cast into ingots. During the smelting of the cathode zinc, a small amount of water is introduced, causing the zinc liquid in the furnace to oxidize into zinc oxide, which in turn forms a scum containing a large number of zinc droplets. This scum affects the efficiency of zinc smelting and the quality of the final product. Therefore, the effective removal of the scum and the reduction of the metallic zinc content in the scum are of primary concern to manufacturers. Non-ferrous metal smelting generally uses a flux adsorption process to remove impurities from the molten metal, which produces a large amount of low-melting-point smelting slag. Taking magnesium or magnesium alloy refining as an example, the current method mainly involves adding a certain amount of chloride salt to adsorb impurities from the magnesium melt, resulting in the production of a large amount of magnesium refining slag (approximately 200kg slag / t 镁 ). Magnesium refining slag is mainly composed of added soluble chloride salts, fluoride salts and adsorbed oxide impurities. Magnesium refining slag contains a large amount of chloride salts and magnesium oxide particles, which are highly hygroscopic. Large-scale discharge will cause soil compaction. In addition, magnesium refining slag has a high alkalinity and will cause soil alkalinization when washed by rainwater. At present, magnesium refining slag is usually treated by wet process or used as an additive for desulfurization, adsorbent, building materials, etc. On the one hand, it cannot achieve the recycling of resources such as flux in magnesium refining slag, and on the other hand, it cannot completely eliminate the harm of harmful components in the slag to the environment and ecology. Summary of the Invention

[0003] In order to solve the above technical problems, the main purpose of the present invention is to provide a metallurgical melt immersion centrifugal high-temperature online separation device, method and use.

[0004] To solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0005] A metallurgical melt immersion centrifugal high-temperature online separation device, comprising:

[0006] Support system (7), support arm (6), separator (3);

[0007] The support system (7) is provided with a hinge slide rail (8) along the vertical direction, and the support arm (6) is connected to the support system (7) through the hinge slide rail (8), so that the support arm (6) can be vertically lifted and lowered along the hinge slide rail (8); a driving component (9) is fixedly connected in the support system (7) for driving the support system (7) to drive the support arm (6) to rotate horizontally; the separator (3) is suspended below the support arm (6), and a transmission component (5) is fixedly connected in the support arm (6), and the transmission component (5) is connected to the separator (3) in a transmission manner, so as to drive the separator (3) to rotate centrifugally.

[0008] As a preferred embodiment of the metallurgical melt immersion centrifugal high-temperature online separation device described in the present invention, the separator (3) includes a separator housing (15) and a separator internal component (17); the separator upper end (4) and the separator lower end (13) have central openings, and the solid-liquid mixed metallurgical melt (2) continuously enters the separator (3) from the separator upper end (4) or the separator lower end (13) central opening during the centrifugal separation process, the liquid phase (12) in the solid-liquid mixed metallurgical melt (2) automatically discharges from the separator (3), and the solid phase (11) in the solid-liquid mixed metallurgical melt (2) is collected in the separator (3); the separator housing (15) is tightly combined with the separator internal component (17) by its own weight during the centrifugal separation process, and the separator housing (15) is separated from the separator internal component (17) during the solid phase (11) discharge process.

[0009] As a preferred embodiment of the metallurgical melt immersion centrifugal high-temperature online separation device described in the present invention, a guide plate (18) is fixedly connected to the bottom of the separator internal component (17) to directionally stir the solid-liquid mixed metallurgical melt (2) to flow toward the inner wall of the separator (3).

[0010] As a preferred embodiment of the metallurgical melt immersion centrifugal high-temperature online separation device described in the present invention, the temperature of the molten pool (1) in which the separator (3) can be immersed is 25-1300°C.

[0011] As a preferred embodiment of the metallurgical melt immersion centrifugal high-temperature online separation device described in the present invention, the metallurgical melt immersion centrifugal high-temperature online separation device further comprises a slag removal cylinder (14). After the separation is completed, the separator (3) is lowered into the slag removal cylinder (14), and at the same time, the separator shell (15) is separated from the separator internal components (17), and the centrifugal rotation is started to discharge the solid phase (11).

[0012] To solve the above technical problems, according to another aspect of the present invention, the present invention provides the following technical solutions:

[0013] A method for high-temperature online separation of metallurgical melts by immersion centrifugation is provided, which uses the above-mentioned high-temperature online separation device for metallurgical melts by immersion centrifugation, and comprises the following steps:

[0014] S1, controlling the support arm (6) to descend, driving the separator (3) to be immersed in the metallurgical melt (2) in the molten pool (1);

[0015] S2, start the separator (3) to centrifugal rotate. Under the action of centrifugal force, the liquid phase (12) in the solid-liquid mixed metallurgical melt (2) is automatically discharged from the separator (3), and the solid phase (11) in the solid-liquid mixed metallurgical melt (2) is collected in the separator (3). Due to the negative pressure formed by the discharge of the liquid phase (12), the solid-liquid mixed metallurgical melt (2) continues to enter the separator (3) from the opening at the upper end (4) or the lower end (13) of the separator for centrifugal separation;

[0016] S3, after 1 to 30 minutes of separation, the support arm (6) is controlled to rise, driving the separator (3) out of the molten pool (1), and the centrifugal rotation is stopped;

[0017] S4. The support system (7) drives the support arm (6) to rotate horizontally, controls the support arm (6) to drive the separator (3) to descend into the slag removal cylinder (14), and simultaneously separates the separator housing (15) from the separator internal components (17), starts centrifugal rotation, and discharges the solid phase (11).

[0018] As a preferred embodiment of the method for high-temperature online separation of metallurgical melt by immersion centrifugation, the method further comprises step S5, repeating steps S1-S4 until no more solid phase (11) is discharged, thereby achieving high-temperature online separation of the metallurgical melt (2) by immersion centrifugation.

[0019] As a preferred embodiment of the high-temperature online separation method for metallurgical melt by immersion centrifugation according to the present invention, in step S2, the gravity coefficient generated by the centrifugal rotation is 100-2000G.

[0020] As a preferred embodiment of the high-temperature online separation method for metallurgical melt by immersion centrifugation according to the present invention, in step S4, the gravity coefficient generated by the centrifugal rotation is 50-300G.

[0021] To solve the above technical problems, according to another aspect of the present invention, the present invention provides the following technical solutions:

[0022] The above-mentioned metallurgical melt immersion centrifugal high-temperature online separation device is used in the fields of high-temperature online impurity removal of metal melts, high-temperature online removal of metal smelting slag, and high-temperature online separation and recovery of metallurgical slag.

[0023] The above-mentioned high-temperature online separation method of metallurgical melt by immersion centrifugation is applied in the fields of high-temperature online impurity removal of metal melt, high-temperature online removal of metal smelting slag, and high-temperature online separation and recovery of metallurgical slag.

[0024] The beneficial effects of the present invention are as follows:

[0025] The present invention proposes a device, method and use for high-temperature online separation of metallurgical melts by immersion centrifugation. The separator is driven by a support arm to be immersed in a high-temperature molten pool for centrifugal rotation, and the liquid phase is automatically discharged from the separator. The solid phase is collected in the separator, and the solid-liquid mixed metallurgical melt continues to enter the separator for centrifugal separation. After centrifugal separation, the separator is driven by the support arm to be pulled out of the molten pool, rotated horizontally, and lowered into the slag removal cylinder. At the same time, the separator shell is detached, the centrifugal rotation is started, and the solid phase is discharged. The device of the present invention is simple, has high separation efficiency, a high degree of automation, and can realize online separation. It can be applied to the fields of high-temperature online impurity removal of metal melts, high-temperature online removal of metal smelting slag, and high-temperature online separation and recovery of metallurgical slag. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0027] Figure 1 This is a schematic structural diagram of the metallurgical melt immersion centrifugal high-temperature online separation device of the present invention;

[0028] Figure 2 This is a schematic diagram of the separator structure of the metallurgical melt immersion centrifugal high-temperature online separation device of the present invention;

[0029] Figure 3 Schematic diagram of the process of the metallurgical melt immersion centrifugal high-temperature online separation method of the present invention;

[0030] Figure 4 The macromorphology and SEM image of the sample of high-temperature online impurity removal of molten metal in Example 1;

[0031] Figure 5 This is the XRD pattern of the high-temperature online impurity removal sample of the molten metal in Example 1;

[0032] Figure 6 The macroscopic morphology and SEM image of the sample of high-temperature online removal of metal smelting slag in Example 3;

[0033] Figure 7 This is the XRD pattern of the sample obtained by high-temperature online removal of metal smelting slag in Example 3;

[0034] Figure 8 The macromorphology and SEM image of the sample recovered from the high-temperature online separation of metallurgical slag in Example 5;

[0035] Figure 9 This is the XRD diagram of the sample recovered by high-temperature online separation of metallurgical slag in Example 5.

[0036] Among them: 1-molten pool, 2-metal melt, 3-separator, 4-separator upper port, 5-transmission assembly, 6-support arm, 7-support system, 8-hinge slide, 9-drive assembly, 10-foundation, 11-solid phase, 12-liquid phase, 13-separator lower port, 14-slag removal cylinder, 15-separator housing, 16-transmission shaft, 17-separator internal components, 18-guide vane.

[0037] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0038] The following will be a clear and complete description of the technical solutions in the embodiments. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0039] According to one aspect of the present invention, the present invention provides the following technical solutions:

[0040] like Figure 1-2 As shown, a metallurgical melt immersion centrifugal high-temperature online separation device comprises:

[0041] Support system 7, support arm 6, separator 3;

[0042] The support system 7 is arranged on the foundation 10, and is provided with a hinge slide rail 8 in the vertical direction. The support arm 6 is connected to the support system 7 through the hinge slide rail 8, so that the support arm 6 can be vertically lifted and lowered along the hinge slide rail 8; a driving component 9 is fixedly connected to the support system 7, which is used to drive the support system 7 to drive the support arm 6 to rotate horizontally; the separator 3 is suspended below the support arm 6, and a transmission component 5 is fixedly connected to the support arm 6. The transmission component 5 is connected to the separator 3 through the transmission shaft 16, driving the separator 3 to rotate centrifugally.

[0043] Preferably, the separator 3 includes a separator shell 15 and a separator internal component 17; the separator upper end 4 and the separator lower end 13 have central openings, and the solid-liquid mixed metallurgical melt 2 in the molten pool 1 continuously enters the separator 3 from the separator upper end 4 or the separator lower end 13 central opening during the centrifugal separation process, and the liquid phase 12 in the solid-liquid mixed metallurgical melt 2 is automatically discharged from the separator 3, and the solid phase 11 in the solid-liquid mixed metallurgical melt 2 is collected in the separator 3; the separator shell 15 relies on its own weight to be tightly combined with the separator internal component 17 during the centrifugal separation process, and the separator shell 15 is separated from the separator internal component 17 during the discharge process of the solid phase 11.

[0044] Preferably, a guide plate 18 is fixedly connected to the bottom of the separator internal component 17 to directionally stir the solid-liquid mixed metallurgical melt 2 to flow toward the inner wall of the separator 3.

[0045] Preferably, the temperature of the high-temperature molten pool in which the separator 3 can be immersed is 25-1300°C.

[0046] Preferably, the metallurgical melt immersion centrifugal high-temperature online separation device also includes a slag removal cylinder 14. After the separation is completed, the separator 3 is lowered into the slag removal cylinder 14, and the separator shell 15 is separated from the separator internal component 17, and the centrifugal rotation is started to discharge the solid phase 11.

[0047] According to another aspect of the present invention, the present invention provides the following technical solutions:

[0048] like Figure 3 As shown, a method for high-temperature online separation of metallurgical melt by immersion centrifugation is provided, which uses the above-mentioned high-temperature online separation device for metallurgical melt immersion centrifugation, and includes the following steps:

[0049] S1, control the support arm 6 to descend, driving the separator 3 to be immersed in the metallurgical melt 2 in the molten pool 1;

[0050] S2. Start the centrifugal rotation of the separator 3. Under the action of centrifugal force, the liquid phase 12 in the solid-liquid mixed metallurgical melt 2 is automatically discharged from the separator 3, and the solid phase 11 in the solid-liquid mixed metallurgical melt 2 is collected in the separator 3. Due to the negative pressure formed by the discharge of the liquid phase 12, the solid-liquid mixed metallurgical melt 2 continues to enter the separator 3 from the central opening of the separator upper end 4 or the separator lower end 13 for centrifugal separation;

[0051] S3, after 1 to 30 minutes of separation, the support arm 6 is controlled to rise, driving the separator 3 out of the molten pool 1 and stopping the centrifugal rotation;

[0052] S4. The support system 7 drives the support arm 6 to rotate horizontally, controls the support arm 6 to drive the separator 3 to descend into the slag removal cylinder 14, and at the same time separates the separator shell 15 from the separator internal component 17, starts centrifugal rotation, and discharges the solid phase.

[0053] Preferably, the method for high-temperature online separation of metallurgical melt by immersion centrifugation further comprises step S5, repeating steps S1-S4 until no more solid phase 11 is discharged, thereby achieving high-temperature online separation of the metallurgical melt 2 by immersion centrifugation.

[0054] Preferably, in step S2, the gravity coefficient generated by centrifugal rotation is 100-2000G.

[0055] Preferably, in step S4, the gravity coefficient generated by centrifugal rotation is 50-300G.

[0056] According to another aspect of the present invention, the present invention provides the following technical solutions:

[0057] The above-mentioned metallurgical melt immersion centrifugal high-temperature online separation device is used in the fields of high-temperature online impurity removal of metal melts, high-temperature online removal of metal smelting slag, and high-temperature online separation and recovery of metallurgical slag.

[0058] The above-mentioned high-temperature online separation method of metallurgical melt by immersion centrifugation is applied in the fields of high-temperature online impurity removal of metal melt, high-temperature online removal of metal smelting slag, and high-temperature online separation and recovery of metallurgical slag.

[0059] The technical solution of the present invention is further described below with reference to specific embodiments.

[0060] The following embodiments are all implemented using the above-mentioned metallurgical melt immersion centrifugal high-temperature online separation device.

[0061] Example 1

[0062] A high-temperature online impurity removal method for molten metal comprises the following steps:

[0063] S1. Control the support arm to descend, driving the separator to be immersed in the metallurgical melt in the molten pool (crude lead is melted to obtain crude lead liquid, whose composition, by mass percentage, is: Pb 95.12%, Cu 3.6%, S 1.45%, As 1.04%, Sb 0.77%, Al 0.34%; the molten pool temperature is controlled at 350°C to achieve sufficient melting of copper in the lead liquid);

[0064] S2. Start centrifugal rotation of the separator, control the molten pool temperature to 350°C, and generate a gravity coefficient of 300G; under the action of centrifugal force, the lead liquid phase automatically discharges from the separator, and the copper solid phase is collected in the separator. Due to the negative pressure generated by the discharge of the lead liquid phase, the crude lead liquid continuously enters the separator from the center opening at the upper or lower end of the separator for centrifugal separation;

[0065] S3. After 6 minutes of separation, the support arm is controlled to rise, driving the separator out of the molten pool and stopping the centrifugal rotation;

[0066] S4. The support system drives the support arm to rotate horizontally, controlling the support arm to drive the separator down into the slag removal cylinder. At the same time, the separator shell is separated from the separator internal components, and centrifugal rotation is started. The gravity coefficient generated by the centrifugal rotation is 200G, and the copper solid phase is discharged;

[0067] S5. Repeat steps S1-S4 until no more copper solid phase is discharged, thereby achieving high-temperature online separation of crude lead liquid by immersion centrifugation.

[0068] The copper solid phase separated into the slag removal cylinder and the lead liquid in the molten pool after separation were sampled and analyzed. The macromorphology, SEM and XRD patterns of the separated samples are shown as follows: Figure 4 、 Figure 5 As shown. Figure 4 It can be seen that the copper solid phase in the lead liquid has been efficiently separated. The separated copper solid phase has a very high purity, is golden in color, and has a size of 80-200μm. The purity of the lead liquid after separation is also very high. Figure 5 It can be seen that in the XRD patterns of the separated copper solid phase and lead liquid, only a single diffraction peak of Cu or Pb appears, respectively, which further proves the high purity of the separated copper solid phase and lead liquid.

[0069] This embodiment uses a high-temperature metallurgical melt immersion-type online centrifugal separation device and method to achieve the melting and crystallization separation of copper in a typical non-ferrous metal mixed melt (crude lead liquid). The lead liquid and the copper solid phase are efficiently separated. The separated lead liquid and copper solid phase are both of high purity. The copper content in the lead liquid is reduced to 0.06wt%, and the copper removal rate in the lead liquid reaches 99.50%.

[0070] Example 2

[0071] The difference from Example 1 is that in step S2, the molten pool temperature is controlled to 400° C., the gravity coefficient generated by centrifugal rotation is 600G; and in step S3, the separation is performed for 3 minutes.

[0072] The purity of the lead liquid and copper solid phase separated in this embodiment is very high, the copper content in the lead liquid is reduced to 0.08wt%, and the removal rate of copper in the lead liquid reaches 98.70%.

[0073] Example 3

[0074] A high-temperature online removal method for metal smelting slag comprises the following steps:

[0075] S1. Control the support arm to descend, driving the separator to immerse into the metallurgical melt in the molten pool (zinc oxide produced by the melting of cathode zinc forms an oxidized slag on the surface of the zinc liquid, with the composition by mass percentage being: ZnO 70.6%, Zn 28.1%, Fe 0.6%, Al 0.7%);

[0076] S2. Start centrifugal rotation of the separator, control the molten pool temperature to 430°C, and generate a gravity coefficient of 300G. Under the action of centrifugal force, the oxidized scum is retained inside the separator, while the zinc liquid is discharged into the molten pool. The scum and zinc liquid continuously enter the separator from the upper end for centrifugal separation.

[0077] S3. After 8 minutes of separation, the support arm is controlled to rise, driving the separator out of the molten pool and stopping the centrifugal rotation;

[0078] S4. The support system drives the support arm to rotate horizontally, controlling the support arm to drive the separator down into the slag removal cylinder. At the same time, the separator shell is separated from the separator internal components, and centrifugal rotation is started. The gravity coefficient generated by the centrifugal rotation is 50G, which discharges the oxidized slag.

[0079] S5. Repeat steps S1-S4 until no more oxidized slag is discharged, thereby achieving high-temperature online separation of the metallurgical melt by immersion centrifugation.

[0080] The oxidized slag separated into the slag removal cylinder and the zinc liquid in the molten pool after separation were sampled and analyzed respectively. The macromorphology, SEM and XRD patterns of the separated samples are shown in the figure below. Figure 6 、 Figure 7 As shown. Figure 6 It can be seen that the slag produced during the casting of cathode zinc sheets is efficiently separated, and the separated zinc liquid is used for ingot casting. Figure 7 It can be seen that the diffraction peaks of ZnO or Zn appear in the XRD patterns of the separated zinc oxide slag and zinc liquid, respectively, which further proves the effect of slag separation.

[0081] This embodiment uses a high-temperature metallurgical melt immersion online centrifugal separation device and method to achieve efficient separation of zinc liquid and oxidized dross in typical non-ferrous metal smelting dross (cathode zinc sheet casting dross). The separated zinc liquid and dross are both of high purity, with a Zn content of 0.8wt% in the dross and a zinc liquid removal rate of 99.23%.

[0082] Example 4

[0083] The difference from Example 3 is that in step S2, the molten pool temperature is controlled to 450° C., the gravity coefficient generated by centrifugal rotation is 500G; and in step S3, separation is performed for 5 minutes.

[0084] The Zn content in the slag of this embodiment is 0.6 wt %, and the zinc liquid removal rate in the slag reaches 99.83%.

[0085] Example 5

[0086] A high-temperature online separation and recovery method for metallurgical slag comprises the following steps:

[0087] S1. Control the support arm to descend, driving the separator to immerse in the metallurgical melt in the molten pool (hot magnesium refining slag, composition by mass percentage: MgO 16.6%, Al2O3 1.00%, K2O 2.02%, Na2O 23.7%, CaO 6.28%, Cl48.4%, F 1.15%; control the molten pool temperature to 730°C to ensure that the chloride salts in the magnesium refining slag are fully melted while the MgO remains in a solid state);

[0088] S2. Start the centrifugal rotation of the separator. The gravity coefficient generated by the centrifugal rotation is 500G. Under the action of centrifugal force, the molten salt is automatically discharged from the separator, and MgO is collected in the separator. Due to the negative pressure formed by the discharge of the molten salt, the molten salt-MgO mixture continues to enter the separator from the upper end of the separator for centrifugal separation.

[0089] S3. After 10 minutes of separation, the support arm is controlled to rise, driving the separator out of the molten pool and stopping the centrifugal rotation;

[0090] S4. The support system drives the support arm to rotate horizontally, controls the support arm to drive the separator down into the slag removal cylinder, and simultaneously separates the separator shell from the separator internal components, and starts centrifugal rotation. The gravity coefficient generated by the centrifugal rotation is 100G, and the MgO solid phase is discharged;

[0091] S5. Repeat steps S1-S4 until no more MgO solid phase is discharged, thereby achieving high-temperature online separation and recovery of metallurgical slag.

[0092] The MgO particles separated into the slag removal cylinder and the molten salt in the molten pool after separation were sampled and analyzed. The macromorphology, SEM and XRD patterns of the separated samples are shown as follows: Figure 8 、 Figure 9 As shown. Figure 8 It can be seen that MgO in magnesium refining slag is efficiently separated, the separated MgO is of very high purity and dark gray in color; the purity of the molten salt after separation is also very high and bright white in color. Figure 9 It can be seen that in the XRD patterns of the separated MgO and molten salt, only a single diffraction peak of MgO or NaCl appears, respectively, which further proves the high purity of the separated MgO and molten salt.

[0093] This embodiment uses a high-temperature metallurgical melt immersion-type online centrifugal separation device and method to achieve efficient separation of molten salt and MgO in typical non-ferrous metal smelting dross (magnesium refining slag). The separated molten salt and MgO are both of high purity, with the MgO content in the molten salt reduced to 0.22wt%, and the MgO removal rate in the molten salt reaching 99.23%.

[0094] Example 6

[0095] The difference from Example 5 is that the molten pool temperature is controlled to 650° C. in step S1; the gravity coefficient generated by centrifugal rotation in step S2 is 700 G; and the separation is performed for 5 minutes in step S3.

[0096] The MgO content in the molten salt separated in this embodiment is reduced to 0.18 wt %, and the removal rate of MgO in the molten salt is as high as 99.34%.

[0097] The present invention uses a support arm to drive the separator to be immersed in a high-temperature molten pool and centrifugally rotated, so that the liquid phase is automatically discharged from the separator, and the solid phase is collected in the separator. The solid-liquid mixed metallurgical melt continues to enter the separator for centrifugal separation; after centrifugal separation, the support arm drives the separator out of the molten pool, rotates horizontally, and descends into the slag removal cylinder. At the same time, the separator shell is detached, and centrifugal rotation is started to discharge the solid phase. The equipment of the present invention is simple, has high separation efficiency, a high degree of automation, and can realize online separation. It can be applied to the fields of high-temperature online impurity removal of molten metals, high-temperature online removal of metal smelting slag, and high-temperature online separation and recovery of metallurgical slag.

[0098] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A metallurgical melt immersion centrifugal high-temperature online separation device, characterized in that: It consists of a support system (7), a support arm (6), a separator (3), and a slag removal cylinder (14); The support system (7) is provided with a hinge rail (8) along the vertical direction, and the support arm (6) is connected to the support system (7) through the hinge rail (8), so that the support arm (6) can be vertically lifted and lowered along the hinge rail (8); a driving assembly (9) is fixedly connected in the support system (7) for driving the support system (7) to drive the support arm (6) to rotate horizontally; the separator (3) is suspended below the support arm (6), and a transmission assembly (5) is fixedly connected in the support arm (6), and the transmission assembly (5) is in transmission connection with the separator (3) to drive the separator (3) to rotate centrifugally; The separator (3) includes a separator housing (15) and a separator internal component (17); the separator upper end (4) and the separator lower end (13) have central openings, and the solid-liquid mixed metallurgical melt (2) continuously enters the separator (3) from the separator upper end (4) or the separator lower end (13) central opening during the centrifugal separation process, and the liquid phase (12) in the solid-liquid mixed metallurgical melt (2) is automatically discharged from the separator (3), and the solid phase (11) in the solid-liquid mixed metallurgical melt (2) is collected in the separator (3); the separator housing (15) is tightly combined with the separator internal component (17) by its own weight during the centrifugal separation process; After the separation is completed, the separator (3) is lowered into the deslagging cylinder (14), and the separator shell (15) is separated from the separator internal components (17), and the centrifugal rotation is started to discharge the solid phase (11).

2. The metallurgical melt immersion centrifugal high-temperature online separation device according to claim 1, characterized in that: A guide plate (18) is fixedly connected to the bottom of the separator internal component (17) to directionally stir the solid-liquid mixed metallurgical melt (2) to flow toward the inner wall of the separator (3).

3. The metallurgical melt immersion centrifugal high-temperature online separation device according to claim 1, characterized in that: The temperature of the molten pool (1) in which the separator (3) can be immersed is 25-1300°C.

4. A method for high-temperature online separation of metallurgical melts by immersion centrifugation, using the metallurgical melt immersion centrifugation high-temperature online separation device according to any one of claims 1 to 3, characterized in that: The steps include: S1, controlling the support arm (6) to descend, driving the separator (3) to be immersed in the metallurgical melt (2) in the molten pool (1); S2, start the separator (3) to centrifugal rotate. Under the action of centrifugal force, the liquid phase (12) in the solid-liquid mixed metallurgical melt (2) is automatically discharged from the separator (3), and the solid phase (11) in the solid-liquid mixed metallurgical melt (2) is collected in the separator (3). Due to the negative pressure formed by the discharge of the liquid phase (12), the solid-liquid mixed metallurgical melt (2) continues to enter the separator (3) from the opening at the upper end (4) or the lower end (13) of the separator for centrifugal separation; S3, after 1 to 30 minutes of separation, the support arm (6) is controlled to rise, driving the separator (3) out of the molten pool (1), and the centrifugal rotation is stopped; S4. The support system (7) drives the support arm (6) to rotate horizontally, controls the support arm (6) to drive the separator (3) to descend into the slag removal cylinder (14), and simultaneously separates the separator housing (15) from the separator internal components (17), starts centrifugal rotation, and discharges the solid phase (11).

5. The metallurgical melt immersion centrifugal high-temperature online separation method according to claim 4, characterized in that: The metallurgical melt immersion centrifugal high-temperature online separation method further includes step S5, repeating steps S1-S4 until no more solid phase (11) is discharged, thereby achieving immersion centrifugal high-temperature online separation of the metallurgical melt (2).

6. The metallurgical melt immersion centrifugal high-temperature online separation method according to claim 4, characterized in that: In the step S2, the gravity coefficient generated by the centrifugal rotation is 100-2000G; in the step S4, the gravity coefficient generated by the centrifugal rotation is 50-300G.

7. An application of the metallurgical melt immersion centrifugal high-temperature online separation device according to any one of claims 1 to 3 in the fields of high-temperature online impurity removal of metal melts, high-temperature online removal of metal smelting slag, and high-temperature online separation and recovery of metallurgical slag.

8. An application of the high-temperature online separation method of metallurgical melt by immersion centrifugation according to any one of claims 4 to 6 in the fields of high-temperature online impurity removal of metal melts, high-temperature online removal of metal smelting slag, and high-temperature online separation and recovery of metallurgical slag.

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