Centrifugal supergravity online separation equipment and method for hot galvanizing suspension slag

Abstract

The application provides a centrifugal supergravity online separation device and method for hot galvanizing suspension slag, and the device comprises a centrifugal separator, a movable support device, a centrifugal rotating system, wherein the support device is located on one side of the centrifugal separator, the support device comprises a stand column and a hanging arm arranged on the top of the stand column; one end of the centrifugal rotating system is connected with the hanging arm, and the other end is connected with the centrifugal separator; the centrifugal separator comprises an outer assembly and an inner assembly, the top of the outer assembly is overlapped on the top of the inner assembly, the top of the outer assembly and the inner assembly is provided with a plurality of openings penetrating each other, a spiral blade is arranged in the inner assembly, and the bottom of the inner assembly is an alumina filter plate, and a plurality of slag discharge ports are arranged on the side wall. The device is simple, has high automation degree and high separation efficiency, can be directly applied to a hot galvanizing pool to realize online separation of the suspension slag, and improves the coating quality of hot galvanizing products.

Description

Technical Field

[0001] This invention relates to the field of recycling of hot-dip galvanized suspended slag and improving the quality of galvanized products, and particularly to a centrifugal online separation device and method for hot-dip galvanized suspended slag. Background Technology

[0002] With the development of hot-dip galvanizing technology, the current industrial galvanizing methods are mainly classified into hot-dip pure zinc, hot-dip aluminum-zinc, and hot-dip zinc-aluminum-magnesium according to the process. Based on the different states of the zinc dross, it can be divided into three types: surface dross, suspended dross, and bottom dross. The formation of zinc dross not only consumes a large amount of zinc, increasing galvanizing costs, but also seriously affects the surface quality of hot-dip galvanized sheets. In the continuous hot-dip galvanizing process, the zinc bath is generally in an iron-saturated state, and suspended dross will inevitably be generated in the zinc pot. Zinc dross easily adheres directly to the surface of the steel strip during operation, forming zinc dross defects. Simultaneously, zinc dross accumulates on the submerged rolls and stabilizing rolls. When the steel strip passes through these rolls, it is easily pressed onto the surface of the strip, forming dotted indentations. Zinc dross defects on the surface of galvanized sheets are mainly caused by suspended dross and surface dross, with suspended dross causing greater damage. The dross particles in suspended dross are finer, with less collision between them, making them more likely to fall onto the submerged rolls and stabilizing rolls under the influence of the flow field, forming lumps that cause indentations on the strip and affect the final product quality.

[0003] Currently, electromagnetic purification technology has been proposed for the removal of suspended slag and the purification of molten zinc. The main principle of electromagnetic purification technology is to utilize the difference in conductivity between the molten galvanized metal and the zinc slag particles within it. Under the influence of an electromagnetic field, the zinc slag particles can be separated from the molten metal. The separated zinc slag particles are then removed through the fixation and capture effect of a medium, thus achieving electromagnetic purification of the molten metal. However, electromagnetic purification methods have no industrial applications, and the industry urgently needs an effective means to remove suspended slag and improve the purity of hot-dip galvanizing baths.

[0004] The recycling of suspended slag is crucial because, besides iron-aluminum-zinc-silicon intermetallic compounds and a small amount of zinc oxide, its main component is molten zinc, with a zinc content exceeding 80%. Therefore, researchers both domestically and internationally have developed methods such as vacuum distillation and electrolytic refining to recover zinc resources from hot-dip galvanizing suspended slag. Vacuum distillation separates zinc from impurities under vacuum conditions, allowing for the preparation of zinc through distillation and rectification. However, this method is limited by the difficulty of continuous operation in a vacuum environment. Electrolytic refining uses ammonium chloride solution to leach the hot-dip galvanizing suspended slag, followed by electrolysis to produce zinc. This method, however, causes significant environmental pollution due to the large amount of wastewater discharged. Summary of the Invention

[0005] The purpose of this invention is to provide a centrifugal online separation device and method for hot-dip galvanized suspended slag. This device can be directly applied to hot-dip galvanizing tanks to achieve online separation of suspended slag, thereby improving the coating quality of hot-dip galvanized products.

[0006] This invention provides a centrifugal online separation device for hot-dip galvanized suspended slag, comprising a centrifuge 1, a movable support device 2, and a centrifugal rotation system 3. The support device 2 is located on one side of the centrifuge 1 and includes a column 201 and a boom 202 mounted on top of the column. The centrifugal rotation system 3 is located below the boom 201, with one end connected to the boom 202 and the other end connected to the centrifuge 1. The centrifuge 1 includes an outer component 101 and an inner component 102, with the top of the outer component 101 overlapping the inner component 102. The top of the inner component 102 and the bottom of the outer component 101 are locked to the bottom of the inner component 102 by several openable latches. The tops of the outer component 101 and the inner component 102 are provided with several openings, and when the outer component 101 and the inner component 102 are kept in a sealed state, the openings are interconnected. The inner component 101 is equipped with a spiral blade. The bottom of the inner component 102 is an alumina filter plate, and the side wall is provided with several slag discharge ports. The inner component 102 is connected to the other end of the centrifugal rotation system 3. The centrifugal separator 1 can be raised and lowered.

[0007] Furthermore, the movable support device 2 is specifically provided with casters at the bottom of the support device.

[0008] Furthermore, the specific structure of the centrifugal separator 1 that can be raised and lowered includes: the boom 202 is connected to the column 201 via a hinge, and / or the centrifugal rotation system 3 is connected to the boom 202 via a telescopic connecting rod.

[0009] Furthermore, the outer component 101 has an outwardly extending extension 103 circumferentially provided on its side, and the outer component 101 is locked to the bottom of the inner component 102 by an openable and closable latch.

[0010] Furthermore, the outer diameter of the centrifuge 1 is 30-60cm, and the height of the centrifuge 1 is 20-30cm.

[0011] Furthermore, the inner component 102 is a hollow cylindrical structure, including side walls, a top and a bottom, and the outer component 101 is a hollow cylindrical structure, including a top and side walls, with an opening at the bottom for the outer component 101 to pass through and overlap the inner component 102.

[0012] Furthermore, it also includes a remote control system 4, which comprises multiple control modules, each electrically connected to a component of the separation device.

[0013] Furthermore, the centrifugal separator 1 rotates at a speed of not less than 100 r / min.

[0014] This invention also provides a method for online centrifugal separation of hot-dip galvanized suspended slag, the method employing the aforementioned separation equipment, and the method comprising the following steps:

[0015] 1) The movable support device 2 is located on the side of the hot-dip galvanizing bath closest to where the zinc ingots are placed;

[0016] 2) Control the centrifugal separator 1 to descend until the top of the outer component 101 is at least 30cm below the hot-dip galvanizing liquid surface. Then, start the centrifugal rotation system 3 to control the centrifugal separator 1 to rotate at a speed of not less than 100r / min below the zinc bath liquid surface. At the same time, the centrifugal separator 1 descends at a speed of 0.5-1.5m / min until its bottom is at least 30cm below the bottom of the zinc bath. Then, raise the top of the centrifugal separator 1 at a speed of 0.5-1.5m / min to the position when the centrifugal rotation system was initially started (i.e., the top of the outer component 101 is at least 30cm below the hot-dip galvanizing liquid surface).

[0017] 3) Repeat step 2) 4-10 times to complete the centrifugal separation of hot-dip galvanized suspended slag.

[0018] Furthermore, the method also includes: after completing the centrifugal separation of the hot-dip galvanized suspended slag, moving the support device 2 to position the centrifugal separator 1 above the slag collection cylinder, opening the latch, controlling the centrifugal separator 1 to descend, attaching the extension 103 of the outer component 101 to the slag collection cylinder, and continuing to descend until the outer component 101 is separated from the inner component 102, and then rotating the centrifugal separator 1, at which time the zinc slag is discharged through the slag discharge port on the side wall of the inner component 102, completing the slag discharge.

[0019] Furthermore, the temperature of the zinc liquid in the hot-dip galvanizing bath is 450℃-900℃.

[0020] Compared with the prior art, the present invention has the following technical effects:

[0021] The equipment of this invention is simple, highly automated, and has high separation efficiency. It can be directly applied to hot-dip galvanizing tanks in the process of hot-dip galvanizing to achieve real-time online separation of suspended slag, thereby improving the quality and efficiency of hot-dip galvanized products. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the online centrifugal separation device for hot-dip galvanized suspended slag according to the present invention.

[0023] Figure 2 This is a schematic diagram of the centrifugal separator structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the slag collection cylinder structure of the present invention;

[0025] Figure 4 The macroscopic morphology and SEM image of the sample in Example 1 of this invention are shown.

[0026] Among them, 1-centrifugal separator, 101-external component, 102-inner component, 103-extension, 2-support device, 201-column, 202-arm, 3-centrifugal rotation system, 4-remote control system. Detailed Implementation

[0027] Various exemplary embodiments of the present invention will now be described in detail. This detailed description should not be considered as a limitation of the present invention, but rather as a more detailed description of certain aspects, features, and embodiments of the present invention.

[0028] It should be understood that the terminology used in this invention is merely for describing particular embodiments and is not intended to limit the invention. Furthermore, with respect to numerical ranges in this invention, it should be understood that each intermediate value between the upper and lower limits of the range is also specifically disclosed. Every smaller range between any stated value or intermediate value within a stated range, and any other stated value or intermediate value within said range, is also included in this invention. The upper and lower limits of these smaller ranges may be independently included or excluded from the range.

[0029] Unless otherwise stated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. While only preferred methods and materials have been described herein, any methods and materials similar or equivalent to those described herein may be used in the implementation or testing of this invention. All references to this specification are incorporated by way of citation to disclose and describe methods and / or materials associated with those references. In the event of any conflict with any incorporated reference, the content of this specification shall prevail.

[0030] Various modifications and variations can be made to the specific embodiments described in this specification without departing from the scope or spirit of the invention, as will be apparent to those skilled in the art. Other embodiments derived from this specification will also be apparent to those skilled in the art. This specification and embodiments are merely exemplary.

[0031] The terms “include,” “including,” “have,” “contain,” etc., used in this article are all open-ended terms, meaning that they include but are not limited to.

[0032] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Example 1

[0034] Reference Figures 1-3 As shown, this embodiment provides a centrifugal online separation device for hot-dip galvanized suspended slag, including a centrifuge 1, a movable support device 2, and a centrifugal rotation system 3. The support device 2 is located on one side of the centrifuge 1 and includes a column 201 and a boom 202 mounted on top of the column 201. The boom 202 is connected to the column 201 via a hinge, and casters are provided at the bottom of the support device 2. The centrifugal rotation system 3 is located below the boom 202, with one end connected to the boom 202. The centrifuge 1 includes an outer component 101 and an inner component 102. The outer diameter of the centrifuge 1 is 30 cm, and the height of the centrifuge 1 is 20 cm. The inner component 102 is a hollow cylindrical structure, including side walls, a top, and a bottom. The outer component 101 is also hollow. The cylindrical structure includes a top and side walls. The bottom is an opening for the outer component 101 to pass through and overlap the inner component 102. The top of the outer component 101 overlaps the top of the inner component 102. The tops of the outer component 101 and the inner component 102 are provided with an opening, and the openings are interconnected when the outer component 101 and the inner component 102 are kept in a sealed state. A connecting rod is installed inside the inner component 102. One end of the connecting rod is connected to the other end of the centrifugal rotation system, and the other end is connected to the main body of the inner component and extends into the cavity of the inner component. The portion of the connecting rod located in the cavity of the inner component is provided with spiral blades that can generate centrifugal rotation. The bottom of the inner component 102 is an alumina filter plate, and a slag discharge port is provided on the side wall. The outer component 101 has an outwardly extending extension 103 circumferentially provided on its side.

[0035] The method for online separation of hot-dip galvanizing suspended dross using the aforementioned device includes the following steps:

[0036] 1) The movable support device 2 to the centrifugal separator 1 is located on the side of the hot-dip galvanizing tank near where the zinc ingots are placed. The dimensions of the hot-dip galvanizing tank are 400cm*350cm*200cm, and the temperature of the zinc liquid in the hot-dip galvanizing is 450℃.

[0037] 2) Control the centrifugal separator 1 to descend to a position where the top of the outer component 101 is 30cm below the hot-dip galvanizing liquid surface. Then, start the centrifugal rotation system 3 to control the centrifugal separator 1 to rotate at 200r / min. At the same time, the centrifugal separator 1 descends at a speed of 0.6m / min to a position where its bottom is 30cm below the bottom of the zinc liquid. Then, raise the top of the centrifugal separator 1 at a speed of 0.6m / min to the position when the centrifugal rotation system 3 was initially started, i.e., the top of the centrifugal separator 1 is 30cm below the hot-dip galvanizing liquid surface.

[0038] 3) Repeat step 2) 8 times, then move the support device 2 so that the centrifugal separator 1 is above the slag collection cylinder, control the centrifugal separator 1 to descend, and after the extension 103 of the outer component 101 is attached to the slag collection cylinder, continue to descend until the outer component 101 is separated from the inner component 102, and then rotate the centrifugal separator 1. At this time, the zinc slag is discharged through the slag discharge port on the side wall of the inner component 102, and the slag discharge is completed.

[0039] Sampling and analysis were performed on the suspended slag discharged into the slag collection cylinder and the zinc liquid in the hot-dip galvanizing bath after separation. The macroscopic morphology and SEM images of the suspended slag and zinc liquid samples are shown below. Figure 4 As shown. By Figure 4 It can be seen that the iron-aluminum-zinc-silicon intermetallic compounds and zinc oxide particles in the hot-dip galvanizing bath were separated online and efficiently. The separated suspended slag was loose and porous. The iron-aluminum-zinc-silicon intermetallic compounds were of very high purity and contained very little zinc metal. The iron removal rate in the molten zinc bath after separation reached 66%.

[0040] Example 2

[0041] This embodiment provides a centrifugal online separation device for hot-dip galvanized suspended slag, including a centrifuge 1, a movable support device 2, and a centrifugal rotation system 3. The support device 2 is located on one side of the centrifuge 1 and includes a column 201 and a boom 202 mounted on top of the column. The boom 202 is connected to the column via a hinge, and casters are provided at the bottom of the support device 2. The centrifugal rotation system 3 is located below the boom 202, with one end connected to the boom 202. The centrifuge 1 includes an outer component 101 and an inner component 102. The outer diameter of the centrifuge 1 is 60 cm, and the height of the centrifuge 1 is 20 cm. The inner component 102 is a hollow cylindrical structure, including side walls, a top, and a bottom. The outer component 101 is also a hollow cylindrical structure. The device includes a top and side walls. The bottom is an opening for the outer component 101 to pass through and overlap the inner component 102. The top of the outer component 101 overlaps the top of the inner component 102. The tops of the outer component 101 and the inner component 102 are provided with an opening, and the openings are interconnected when the outer component 101 and the inner component 102 are kept in a sealed state. A connecting rod is installed inside the inner component 102. One end of the connecting rod is connected to the other end of the centrifugal rotation system, and the other end is connected to the main body of the inner component and extends into the cavity of the inner component. The portion of the connecting rod located in the cavity of the inner component is provided with spiral blades that can generate centrifugal rotation. The bottom of the inner component 102 is an alumina filter plate, and a slag discharge port is provided on the side wall. The outer component 101 has an outwardly extending extension 103 on its side circumferentially.

[0042] The method for online separation of hot-dip galvanizing suspended dross using the aforementioned device includes the following steps:

[0043] 1) The movable support device 2 to the outer component 101 is located on the side of the hot-dip galvanizing bath near where the zinc ingot is placed. The dimensions of the hot-dip galvanizing bath are 400cm*350cm*200cm, and the temperature of the zinc liquid in the hot-dip galvanizing is 450℃.

[0044] 2) Control the centrifuge 1 to descend to a position where the top of the centrifuge 1 is 30cm below the hot-dip galvanizing liquid surface. Then, start the centrifugal rotation system 3 to control the centrifuge 1 to rotate at 200r / min. At the same time, the centrifuge 1 descends at a speed of 1.2m / min to a position where its bottom is 30cm below the bottom of the zinc liquid. Then, raise the top of the centrifuge 1 at a speed of 1.2m / min to the position when the centrifugal rotation system 3 was initially started, i.e., the top of the centrifuge 1 is 30cm below the hot-dip galvanizing liquid surface.

[0045] 3) Repeat steps 1)-2) 8 times, then move the support device 2 so that the centrifugal separator 1 is above the slag collection cylinder, control the centrifugal separator 1 to descend, and after the extension 103 of the outer component 101 is attached to the slag collection cylinder, continue to descend until the outer component 101 is separated from the inner component 102, and then rotate the centrifugal separator 1. At this time, the zinc slag is discharged through the slag discharge port on the side wall of the inner component 102, and the slag discharge is completed.

[0046] Measurements showed that the iron removal rate in the molten zinc pool after separation reached 61%.

[0047] Example 3

[0048] This embodiment provides a centrifugal online separation device for hot-dip galvanized suspended slag, including a centrifuge 1, a movable support device 2, and a centrifugal rotation system 3. The support device 2 is located on one side of the centrifuge 1 and includes a column 201 and a boom 202 mounted on top of the column. The boom 202 is connected to the column 201 via a hinge, and casters are provided at the bottom of the support device 2. The centrifugal rotation system 3 is located below the boom 202, with one end connected to the boom 202. The centrifuge 1 includes an outer component 101 and an inner component 102. The outer diameter of the centrifuge 1 is 30 cm, and the height of the centrifuge 1 is 20 cm. The inner component 102 is a hollow cylindrical structure, including side walls, a top, and a bottom. The outer component 101 is also a hollow cylindrical structure. The structure includes a top and side walls. The bottom is an opening for the outer component 101 to pass through and overlap the inner component 102. The top of the outer component 101 overlaps the top of the inner component 102. The tops of the outer component 101 and the inner component 102 are provided with an opening, and the openings are interconnected when the outer component 101 and the inner component 102 are kept in a sealed state. A connecting rod is installed inside the inner component 102. One end of the connecting rod is connected to the other end of the centrifugal rotation system, and the other end is connected to the main body of the inner component and extends into the cavity of the inner component. The portion of the connecting rod located in the cavity of the inner component is provided with spiral blades that can generate centrifugal rotation. The bottom of the inner component 102 is an alumina filter plate, and a slag discharge port is provided on the side wall. The side of the outer component 101 is provided with an outwardly extending extension 103.

[0049] The method for online separation of hot-dip galvanizing suspended dross using the aforementioned device includes the following steps:

[0050] 1) The movable support device 2 to the outer component 101 is located on the side of the hot-dip galvanizing bath near where the zinc ingot is placed. The dimensions of the hot-dip galvanizing bath are 400cm*350cm*200cm, and the temperature of the zinc liquid in the hot-dip galvanizing is 450℃.

[0051] 2) Control the centrifuge 1 to descend to a position where the top of the centrifuge 1 is 30cm below the hot-dip galvanizing liquid surface. Then start the centrifugal rotation system 3 to control the centrifuge 1 to rotate at 300r / min. At the same time, the centrifuge 1 descends at a speed of 0.6m / min to a position where its bottom is 30cm below the bottom of the zinc liquid. Then raise the top of the centrifuge 1 at a speed of 0.6m / min to the position when the centrifugal rotation system 3 was initially started, i.e., the top of the centrifuge 1 is 30cm below the hot-dip galvanizing liquid surface.

[0052] 3) Repeat steps 1)-2) 8 times, then move the support device 2 so that the centrifugal separator 1 is above the slag collection cylinder, control the centrifugal separator 1 to descend, and after the extension 103 of the outer component 101 is attached to the slag collection cylinder, continue to descend until the outer component 101 is separated from the inner component 102, and then rotate the centrifugal separator 1. At this time, the zinc slag is discharged through the slag discharge port on the side wall of the inner component 102, and the slag discharge is completed.

[0053] Measurements showed that the iron removal rate in the molten zinc pool after separation reached 71%.

[0054] Example 4

[0055] This embodiment provides a centrifugal online separation device for hot-dip galvanized suspended slag, including a centrifuge 1, a movable support device 2, and a centrifugal rotation system 3. The support device 2 is located on one side of the centrifuge 1 and includes a column 201 and a boom 202 mounted on top of the column. The boom 202 is connected to the column 201 via a hinge, and casters are provided at the bottom of the support device 2. The centrifugal rotation system 1 is located below the boom 202, with one end connected to the boom 202. The centrifuge 1 includes an outer component 101 and an inner component 102. The outer diameter of the centrifuge is 30 cm, and the height of the centrifuge is 20 cm. The inner component 102 is a hollow cylindrical structure, including side walls, a top, and a bottom. The outer component 101 is also a hollow cylindrical structure, including a top and side walls, with an opening at the bottom for the outer component to pass through. 101 passes through and overlaps the inner component 102. The top of the outer component 101 overlaps the top of the inner component 102, and the bottom of the outer component 101 and the bottom of the inner component 102 are locked by four evenly arranged openable and closable latches. The top of the outer component 101 and the inner component 102 are provided with an opening, and when the outer component 101 and the inner component 102 are kept in a sealed state, the opening is interconnected. A connecting rod is installed inside the inner component 102. One end of the connecting rod is connected to the other end of the centrifugal rotation system, and the other end is connected to the main body of the inner component and extends into the cavity of the inner component. The part of the connecting rod located in the cavity of the inner component is provided with a spiral blade that can generate centrifugal rotation. The bottom of the inner component 102 is an alumina filter plate, and a slag discharge port is provided on the side wall. The side of the outer component 101 is provided with an outwardly extending extension 103.

[0056] The method for online separation of hot-dip galvanizing suspended dross using the aforementioned device includes the following steps:

[0057] 1) The movable support device 2 to the outer component 101 is located on the side of the hot-dip galvanizing bath near where the zinc ingot is placed. The dimensions of the hot-dip galvanizing bath are 400cm*350cm*200cm, and the temperature of the zinc liquid in the hot-dip galvanizing is 450℃.

[0058] 2) Control the centrifuge 1 to descend to a position where the top of the centrifuge 1 is 40cm below the hot-dip galvanizing liquid surface. Then start the centrifugal rotation system 3 to control the centrifuge 1 to rotate at 300r / min. At the same time, the centrifuge 1 descends at a speed of 0.6m / min to a position where its bottom is 40cm below the bottom of the zinc liquid. Then raise the top of the centrifuge 1 at a speed of 0.6m / min to the position when the centrifugal rotation system 3 was initially started, i.e., the top of the centrifuge 1 is 30cm below the hot-dip galvanizing liquid surface.

[0059] 3) Repeat step 2) 8 times, then move the support device 2 so that the centrifugal separator 1 is above the slag collection cylinder, open the lock, control the centrifugal separator 1 to descend, and after the extension 103 of the outer component 101 is attached to the slag collection cylinder, continue to descend until the outer component 101 is separated from the inner component 102, and then rotate the centrifugal separator 1. At this time, the zinc slag is discharged through the slag discharge port on the side wall of the inner component 102, and the slag discharge is completed.

[0060] Measurements showed that the iron removal rate in the molten zinc pool after separation reached 65%.

[0061] Example 5

[0062] This embodiment provides a centrifugal online separation device for hot-dip galvanized suspended slag, including a centrifuge 1, a movable support device 2, and a centrifugal rotation system 3. The support device 2 is located on one side of the centrifuge 1 and includes a column 201 and a boom 202 mounted on top of the column 201. The boom 202 is connected to the column 201 via a hinge, and casters are provided at the bottom of the support device 2. The centrifugal rotation system 3 is located below the boom 202, with one end connected to the boom 202. The centrifuge 1 includes an outer component 101 and an inner component 102. The outer diameter of the centrifuge 1 is 50 cm, and the height of the centrifuge 1 is 30 cm. The inner component 102 is a hollow cylindrical structure, including side walls, a top, and a bottom. The outer component 101 is also a hollow cylindrical structure. The structure includes a top and side walls. The bottom is an opening for the outer component 101 to pass through and overlap the inner component 102. The top of the outer component 101 overlaps the top of the inner component 102. The tops of the outer component 101 and the inner component 102 are provided with an opening, and the openings are interconnected when the outer component 101 and the inner component 102 are kept in a sealed state. A connecting rod is installed inside the inner component 102. One end of the connecting rod is connected to the other end of the centrifugal rotation system, and the other end is connected to the main body of the inner component and extends into the cavity of the inner component. The portion of the connecting rod located in the cavity of the inner component is provided with spiral blades that can generate centrifugal rotation. The bottom of the inner component 102 is an alumina filter plate, and a slag discharge port is provided on the side wall. The outer component 101 has an outwardly extending extension 103 circumferentially provided on its side.

[0063] The method for online separation of hot-dip galvanizing suspended dross using the aforementioned device includes the following steps:

[0064] 1) The movable support device 2 to the centrifugal separator 1 is located on the side of the hot-dip galvanizing tank near where the zinc ingots are placed. The dimensions of the hot-dip galvanizing tank are 400cm*350cm*200cm, and the temperature of the zinc liquid in the hot-dip galvanizing is 450℃.

[0065] 2) Control the centrifugal separator 1 to descend to a position where the top of the outer component 101 is 30cm below the hot-dip galvanizing liquid surface. Then, start the centrifugal rotation system 3 to control the centrifugal separator 1 to rotate at 300r / min. At the same time, the centrifugal separator 1 descends at a speed of 0.6m / min to a position where its bottom is 30cm below the bottom of the zinc liquid. Then, raise the top of the centrifugal separator 1 at a speed of 0.6m / min to the position when the centrifugal rotation system 3 was initially started, i.e., the top of the centrifugal separator 1 is 30cm below the hot-dip galvanizing liquid surface.

[0066] 3) Repeat step 2) 8 times, then move the support device 2 so that the centrifugal separator 1 is above the slag collection cylinder, control the centrifugal separator 1 to descend, and after the extension 103 of the outer component 101 is attached to the slag collection cylinder, continue to descend until the outer component 101 is separated from the inner component 102, and then rotate the centrifugal separator 1. At this time, the zinc slag is discharged through the slag discharge port on the side wall of the inner component 102, and the slag discharge is completed.

[0067] Measurements showed that the iron removal rate in the molten zinc pool after separation reached 76%.

[0068] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A centrifugal online separation device for hot-dip galvanized suspended slag, characterized in that: It includes a centrifugal separator (1), a movable support device (2), and a centrifugal rotation system (3), wherein the support device (2) is located on one side of the centrifugal separator (1), and the support device (2) includes a column (201) and a boom (202) disposed on the top of the column. The centrifugal rotation system (3) is located below the boom (202), with one end connected to the boom (202) and the other end connected to the centrifugal separator (1); The centrifugal separator (1) includes an outer component (101) and an inner component (102). The top of the outer component (101) overlaps the top of the inner component (102). The tops of the outer component (101) and the inner component (102) are provided with several openings. When the outer component (101) and the inner component (102) are kept in a sealed state, the openings are interconnected. The inner component (102) is equipped with a spiral blade. The bottom of the inner component (102) is an alumina filter plate, and the side wall is provided with several slag discharge ports. The inner component (102) is connected to the other end of the centrifugal rotation system (3). The centrifugal separator (1) can be raised and lowered. The side of the outer component (101) is provided with an outwardly extending extension (103).

2. The online centrifugal centrifugal separation device for hot-dip galvanized suspended slag according to claim 1, characterized in that: The movable support device (2) is specifically provided with casters at the bottom of the support device.

3. The online centrifugal centrifugal separation device for hot-dip galvanized suspended slag according to claim 1, characterized in that: The specific structure of the centrifugal separator (1) that can be raised and lowered includes: the boom (202) is connected to the column (201) via a hinge, and / or the centrifugal rotation system (3) is connected to the boom (202) via a telescopic link.

4. The online centrifugal centrifugal separation device for hot-dip galvanized suspended slag according to claim 1, characterized in that: The outer component (101) and the bottom of the inner component (102) are locked together by an openable latch.

5. The online centrifugal centrifugal separation device for hot-dip galvanized suspended slag according to claim 1, characterized in that: The outer diameter of the centrifuge (1) is 30-60cm, and the height of the centrifuge (1) is 20-30cm.

6. The online centrifugal centrifugal separation device for hot-dip galvanized suspended slag according to claim 1, characterized in that: It also includes a remote control system (4), which includes multiple control modules that are electrically connected to each component of the separation device.

7. The online centrifugal centrifugal separation device for hot-dip galvanized suspended slag according to claim 1, characterized in that: The centrifugal separator (1) rotates at a speed of not less than 100 r / min.

8. A method for online centrifugal separation of hot-dip galvanized suspended slag, characterized in that: The method employs the separation equipment as described in any one of claims 1-3 and 5-7, and the method includes the following steps: 1) Move the support device (2) to the centrifugal separator (1) located on the side of the hot-dip galvanizing tank near where the zinc ingots are placed; 2) Control the centrifugal separator (1) to descend to a position at least 30 cm below the hot-dip galvanizing liquid surface at the top of the outer component (101), and then start the centrifugal rotation system (3) Control the centrifugal separator (1) to rotate at a speed of not less than 100 r / min below the zinc bath liquid surface, while the centrifugal separator (1) descends at a speed of 0.5-1.5 m / min to a position at least 30 cm below the bottom of the zinc bath liquid, and then raise the top of the centrifugal separator (1) to the position when the centrifugal rotation system was initially started at a speed of 0.5-1.5 m / min; 3) Repeat step 2) 4-10 times to complete the centrifugal separation of hot-dip galvanized suspended dross; 4) Move the support device (2) to position the centrifugal separator (1) above the slag collection cylinder, control the centrifugal separator (1) to descend, and after the extension (103) of the outer component (101) is attached to the slag collection cylinder, continue to descend until the outer component (101) is separated from the inner component (102), and then rotate the centrifugal separator (1). At this time, the zinc slag is discharged through the slag discharge port on the side wall of the inner component (102) to complete the slag discharge.

9. A method for online centrifugal separation of hot-dip galvanized suspended slag, characterized in that: The method employs the separation device as described in claim 4, and the method includes the following steps: 1) Move the support device (2) to the centrifugal separator (1) located on the side of the hot-dip galvanizing tank near where the zinc ingots are placed; 2) Control the centrifugal separator (1) to descend to a position at least 30 cm below the hot-dip galvanizing liquid surface at the top of the outer component (101), and then start the centrifugal rotation system (3) Control the centrifugal separator (1) to rotate at a speed of not less than 100 r / min below the zinc bath liquid surface, while the centrifugal separator (1) descends at a speed of 0.5-1.5 m / min to a position at least 30 cm below the bottom of the zinc bath liquid, and then raise the top of the centrifugal separator (1) to the position when the centrifugal rotation system was initially started at a speed of 0.5-1.5 m / min; 3) Repeat step 2) 4-10 times to complete the centrifugal separation of hot-dip galvanized suspended dross; 4) Move the support device (2) so that the centrifugal separator (1) is above the slag collection cylinder, open the lock, control the centrifugal separator (1) to descend, and after the extension (103) of the outer component (101) is attached to the slag collection cylinder, continue to descend until the outer component (101) is separated from the inner component (102), and then rotate the centrifugal separator (1). At this time, the zinc slag is discharged through the slag discharge port on the side wall of the inner component (102) to complete the slag discharge.

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