A charging structure and method for a vertical magnesium reduction furnace

Abstract

The present application relates to the technical field of metal magnesium production, and particularly relates to a metal magnesium vertical reduction furnace loading structure and method, wherein the loading structure comprises a spherical charger, the spherical charger is provided with a magnesium vapor overflow hole, the spherical charger is filled with pellet material, a plurality of spherical chargers are connected by steel ropes one by one, and the plurality of spherical chargers are arranged in a reduction tank during processing of the reduction furnace. The spherical charger is filled with pellet material, and the spherical charger is arranged in the reduction tank, so that the problem of difficulty in magnesium vapor overflow, low reduction efficiency and slag sticking caused by falling and crushing of the pellet material when the pellet material is directly poured into the reduction tank is solved.

Description

Technical Field

[0001] This invention relates to the field of magnesium production technology, and in particular to a charging structure and method for a vertical reduction furnace for magnesium. Background Technology

[0002] Industrially, magnesium smelting technology mainly refers to the thermal reduction method, represented by the Pidgeon process. The traditional Pidgeon process uses horizontal reamer reduction furnaces, but horizontal reamer production suffers from extremely poor automation and continuity, resulting in low capacity. Furthermore, due to the large span of the horizontal reamers, they are prone to sinking, bending, and deformation under high temperatures, shortening their service life. Therefore, in recent years, vertical reamer reduction furnaces have been adopted to address the problems associated with horizontal reamers. Structurally, the vertical reamer reduction furnace places the reduction vessel vertically inside the furnace chamber, resulting in a high degree of automation in material feeding and discharging. It has now replaced the horizontal reamer reduction furnace and become the mainstream technology.

[0003] In the Chinese invention patent with publication number CN118361950B Figures 1-3 The structure of the current vertical reduction furnace is disclosed in section 0003 of the instruction manual. In the vertical reduction furnace, the reduction tank is placed vertically inside the furnace body, and a central tube is set inside the reduction tank. During production, the material is first added to the area between the tank and the central tube using an overhead crane. Then, the crystallizer and the furnace cover are installed in sequence, so that the pellet material is reduced at a temperature of 1200°C. After the reaction is completed, the furnace cover is opened. First, the crystallizer is removed using an overhead crane, and then the central tube is lifted out using an overhead crane. At the same time, the slag flowing out from the bottom of the reduction tank is collected at the bottom of the furnace using a material collection trolley. After the slag is removed, the central tube and material are put back in for recycling.

[0004] Although vertical reduction furnaces represent a significant improvement over horizontal reduction furnaces, the following production challenges still exist:

[0005] (1) When the pellets are loaded into the vertical tank, the process is a free fall process. Due to the high height of the reduction tank and the poor strength of the pellets, the pellets fall and break down. The crushed pellets are dense, and magnesium vapor is difficult to overflow to the central tube, resulting in low reduction efficiency, reduced reaction efficiency of the pellets, waste of raw materials, and thus increased production costs.

[0006] (2) When the furnace is being tapped, the high-temperature slag tends to stick to the surface of the reduction tank and the central tube, which often leads to unsmooth slag discharge. In severe cases, the entire reduction tank needs to be replaced to treat the sticky slag. Summary of the Invention

[0007] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a charging structure and method for a vertical reduction furnace for metallic magnesium. By setting up spherical charging devices to fill pellets, and arranging the spherical charging devices inside the reduction tank, the problem of magnesium vapor falling and breaking when the pellets are directly poured into the reduction tank is solved, which leads to the problem of low reduction efficiency and slag adhesion.

[0008] A charging structure for a vertical reduction furnace of metallic magnesium includes a magnesium vapor collection mechanism at the top of the reduction tank, comprising a spherical charging device with magnesium vapor overflow holes. The spherical charging device is filled with pellet material, and several spherical charging devices are connected one by one by steel ropes. During the reduction furnace processing, several spherical charging devices are arranged inside the reduction tank.

[0009] By setting up a spherical feeder to fill the pellets, the pellets are protected to maintain their integrity inside the reduction tank, thereby increasing the magnesium vapor overflow rate and thus improving the reduction efficiency. This avoids the problems of magnesium vapor being difficult to overflow and low reduction efficiency, as well as slag adhesion, that occur when the pellets are directly poured into the reduction tank in the current structure. Furthermore, the traditional central tube is eliminated, ensuring the material filling rate of the reduction tank.

[0010] Furthermore, the plurality of spherical feeders are arranged in several layers inside the reduction tank, with adjacent layers of spherical feeders arranged alternately, and each layer having at least 3 spherical feeders.

[0011] By arranging spherical feeders layer by layer and rationally planning the overflow space of magnesium vapor, the reduction efficiency is improved. The staggered arrangement of adjacent layers also increases the material filling rate. Setting at least three spherical feeders in each layer ensures the optimal material filling rate.

[0012] Furthermore, the bottom of the reduction vessel is sealed.

[0013] When tapping out of the furnace, the spherical charging device connected by steel rope can be lifted out sequentially from the top of the furnace. By setting up a reduction tank with a closed bottom, there is no need to set up a cooling water jacket and material receiving equipment at the bottom of the furnace, which reduces the overall construction cost.

[0014] Furthermore, the bottom of the reduction tank is provided with a discharge port, the diameter of which is larger than the diameter of the spherical feeder.

[0015] By setting a discharge port with a diameter larger than that of the spherical feeder, the spherical feeder can be released from the bottom of the reduction tank, reducing the modification cost of the existing furnace.

[0016] Furthermore, the magnesium vapor overflow holes of the spherical feeder are evenly distributed on the surface of the spherical feeder.

[0017] By setting uniformly distributed magnesium vapor overflow holes, the magnesium vapor overflow rate was improved.

[0018] Furthermore, the spherical feeder consists of two opposing hemispherical shells. One end of the connection between the two hemispherical shells is provided with a rotatable fixed terminal, and the other end is provided with a locking terminal. The locking terminal is used to open or close the spherical feeder.

[0019] By designing the specific structure of the spherical feeder, it is made easy to load and unload materials.

[0020] A method for charging a vertical reduction furnace for metallic magnesium, employing a specific charging structure for the furnace, includes the following steps:

[0021] S1. Load the pellet material into the spherical feeder;

[0022] S2. Place several spherical feeders into the reduction tank in sequence;

[0023] S3. Install a magnesium vapor collection mechanism on the top of the reduction tank and close the furnace cover.

[0024] By loading the pellets into a spherical feeder and then placing them sequentially into the reduction tank, the pellets are protected to maintain their shape inside the reduction tank, increasing the magnesium vapor overflow rate and thus improving the reduction efficiency. This avoids the problem of low reduction efficiency caused by the pellets falling and breaking when directly poured into the reduction tank during the current furnace charging process, which makes it difficult for magnesium vapor to overflow.

[0025] Furthermore, after the operation outside the furnace is completed in step S1, the process moves to the top of the furnace to proceed to step S2. By completing the spherical charging outside the furnace, the furnace top charging time is shortened, the furnace shutdown interval is reduced, and production efficiency is improved.

[0026] The beneficial effects of this invention are:

[0027] A charging structure for a vertical magnesium reduction furnace utilizes a spherical charger to load pellets, ensuring the pellets remain intact inside the reduction vessel and increasing the magnesium vapor overflow rate, thereby improving reduction efficiency. This avoids the problems of pellets falling and breaking when directly poured into the reduction vessel in existing structures, which leads to poor magnesium vapor overflow, low reduction efficiency, and slag adhesion. Furthermore, the traditional central pipe is eliminated, ensuring a high material filling rate in the reduction vessel. This charging method not only possesses the advantages of the aforementioned structures but also allows for external spherical charging, shortening the furnace top charging time, reducing furnace downtime, and improving production efficiency. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the loading structure of a vertical reduction furnace for metallic magnesium according to the present invention.

[0029] Figure 2 This is a schematic diagram of the reduction tank structure of the present invention;

[0030] Figure 3 for Figure 2 Schematic diagram of the cross section at point AA;

[0031] Figure 4 for Figure 2 Schematic diagram of the cross section at point BB;

[0032] Figure 5 This is a schematic diagram of the spherical feeder of the present invention when closed;

[0033] Figure 6 This is a schematic diagram of the spherical feeder of the present invention when it is opened;

[0034] Figure 7 This is a schematic diagram of the connection of the spherical feeder of the present invention.

[0035] In the diagram: 1. Reduction tank; 2. Spherical feeder; 21. Shell; 22. Magnesium vapor overflow hole; 23. Fixed terminal; 24. Locking terminal; 3. Magnesium vapor collection mechanism; 4. Pelletized material; 5. Steel rope. Detailed Implementation

[0036] To better explain and facilitate understanding of the present invention, it will be described in detail below with reference to the accompanying drawings and specific embodiments. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a clearer and more thorough understanding of the invention and to fully convey the scope of the invention to those skilled in the art.

[0037] like Figures 1-7 As shown, a charging structure for a vertical reduction furnace of metallic magnesium is provided. The top of the reduction tank 1 is provided with a magnesium vapor collection mechanism 3, which includes a spherical charging device 2. The spherical charging device 2 has a magnesium vapor overflow hole 22. The spherical charging device 2 is filled with pellet material 4. Several spherical charging devices 2 are connected one by one by steel rope 5. During the reduction furnace processing, several spherical charging devices 2 are arranged inside the reduction tank 1.

[0038] By setting up a spherical feeder 2 to fill the pellet material 4, the pellet material 4 is protected to maintain its shape inside the reduction tank 1, and the magnesium vapor overflow rate is increased, thereby improving the reduction efficiency. This avoids the problem of magnesium vapor being difficult to overflow and the resulting low reduction efficiency and slag adhesion when the pellet material 4 is directly poured into the reduction tank in the current structure. In addition, the traditional central tube is eliminated, ensuring the material filling rate of the reduction tank.

[0039] Specifically, the plurality of spherical feeders 2 are arranged in several layers inside the reduction tank 1, with the spherical feeders 2 in adjacent layers arranged alternately, and each layer having at least 3 spherical feeders 2.

[0040] By arranging the spherical feeders 2 in layers, the overflow space of magnesium vapor is rationally planned, improving the reduction efficiency. The staggered arrangement of adjacent layers can also increase the material filling rate. By setting at least 3 spherical feeders 2 in each layer, the material filling rate is guaranteed.

[0041] The filling rate of the reduction tank is affected by the arrangement of the spherical feeders 2. The more spherical feeders 2 are placed in each layer, the higher the filling rate, which increases the upper limit of filling compared to the reduction tank structure with a central tube. The fewer spherical feeders 2 are placed, the higher the magnesium vapor overflow rate. The number of spherical feeders 2 set in each layer can be flexibly selected according to production needs. In this embodiment of the invention, three spherical feeders 2 are set in each layer.

[0042] Specifically, the bottom of the reduction tank 1 is sealed.

[0043] When the furnace is tapped, the spherical charging device 2 connected to the steel rope 5 can be lifted out sequentially from the top of the furnace. By setting up the bottom-sealed reduction tank 1, there is no need to set up a cooling water jacket and receiving equipment at the bottom of the furnace, which reduces the overall construction cost.

[0044] Specifically, the bottom of the reduction tank 1 is provided with a discharge port, the diameter of which is larger than the diameter of the spherical feeder 2.

[0045] By setting a discharge port with a diameter larger than that of the spherical feeder 2, the spherical feeder 2 can be released from the bottom of the reduction tank 1, reducing the modification cost of the existing furnace body.

[0046] Both of the above tapping methods improve the problem of slag adhering to the reduction tank 1 and the central tube wall during tapping.

[0047] Specifically, the magnesium vapor overflow holes 22 of the spherical feeder 2 are evenly distributed on the surface of the spherical feeder 2.

[0048] By setting uniformly distributed magnesium vapor overflow holes 22, the magnesium vapor overflow rate is improved.

[0049] Specifically, the spherical feeder 2 is composed of two opposing hemispherical shells 21. One end of the connection between the two hemispherical shells 21 is provided with a rotatable fixed terminal 23, and the other end is provided with a locking terminal 24. The locking terminal 24 is used to open or close the spherical feeder 2.

[0050] By setting the specific structure of the spherical feeder 2, it is made easy to load and unload materials.

[0051] A method for charging a vertical reduction furnace for metallic magnesium, employing a specific charging structure for the furnace, includes the following steps:

[0052] S1. Fill the spherical feeder 2 with the pellet material 4;

[0053] S2. Place several spherical feeders 2 into the reduction tank 1 in sequence;

[0054] S3. Install magnesium vapor collection mechanism 3 on the top of reduction tank 1 and close the furnace cover.

[0055] By loading the pellet material 4 into the spherical feeder 2 and then placing it into the reduction tank 1 in sequence, the pellet material 4 is protected to maintain its shape inside the reduction tank 1, and the magnesium vapor overflow rate is increased, thereby improving the reduction efficiency. This avoids the problem of low reduction efficiency caused by the magnesium vapor being difficult to overflow when the pellet material 4 is directly poured into the reduction tank during the current furnace charging process, which results in the pellet material 4 falling and breaking, and the magnesium vapor being difficult to overflow.

[0056] Specifically, step S1 involves moving to the furnace top after the external operation is completed, proceeding to step S2. By completing the filling of the spherical charger 2 outside the furnace, the furnace top loading time is shortened, the furnace shutdown interval is reduced, and production efficiency is improved.

[0057] 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. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A charging structure for a vertical reduction furnace for metallic magnesium, wherein a magnesium vapor collection mechanism (3) is provided at the top of the reduction tank (1), characterized in that, It includes a spherical feeder (2), which has a magnesium vapor overflow hole (22). The spherical feeder (2) is filled with pellet material (4). Several spherical feeders (2) are connected one by one by steel rope (5). During the reduction furnace processing, several spherical feeders (2) are arranged inside the reduction tank (1).

2. The charging structure of a vertical reduction furnace for metallic magnesium as described in claim 1, characterized in that, The plurality of spherical feeders (2) are arranged in several layers inside the reduction tank (1), with the spherical feeders (2) of adjacent layers arranged alternately, and each layer having at least 3 spherical feeders (2).

3. The charging structure of a vertical reduction furnace for metallic magnesium as described in claim 1, characterized in that, The bottom of the reduction vessel (1) is sealed.

4. The charging structure of a vertical reduction furnace for metallic magnesium as described in claim 1, characterized in that, The bottom of the reduction tank (1) is provided with a discharge port, the diameter of which is larger than the diameter of the spherical feeder (2).

5. The charging structure of a vertical reduction furnace for metallic magnesium as described in claim 1, characterized in that, The magnesium vapor overflow holes (22) of the spherical feeder (2) are evenly distributed on the surface of the spherical feeder (2).

6. The charging structure of a vertical reduction furnace for metallic magnesium as described in claim 1, characterized in that, The spherical feeder (2) consists of two opposing hemispherical shells (21). One end of the connection between the two hemispherical shells (21) is provided with a rotatable fixed terminal (23), and the other end is provided with a locking terminal (24). The locking terminal (24) is used to open or close the spherical feeder (2).

7. A method for charging a vertical reduction furnace for metallic magnesium, comprising a charging structure for a vertical reduction furnace for metallic magnesium as described in any one of claims 1-6, characterized in that, Includes the following steps: S1. Fill the spherical material (4) into the spherical feeder (2); S2. Place several spherical feeders (2) into the reduction tank (1) in sequence; S3. Install a magnesium vapor collection mechanism (3) on the top of the reduction tank (1) and close the furnace cover.

8. The charging method for a vertical reduction furnace of metallic magnesium as described in claim 7, characterized in that, After the operation outside the furnace is completed in step S1, the furnace is moved to the top and step S2 is entered.

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