Vertical smelting system

Abstract

To provide a vertical smelting system.SOLUTION: Provided is a vertical smelting system, including: a high-temperature heating device 1; a reaction sample mounting device 2 detachably connected to the high-temperature heating device and extending downward from the high-temperature heating device; a reaction product receiving device 3 detachably connected to the reaction sample mounting device and positioned below the reaction sample mounting device; a cooling device 4 positioned below the high-temperature heating device; and transmission devices 5, 6 connected to the reaction sample mounting device and the reaction product receiving device, respectively, for moving the reaction sample mounting device relative to the high-temperature heating device and moving the reaction product receiving device relative to the reaction sample mounting device.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a smelting system, and particularly to a vertical smelting system.

Background Art

[0002] In order to obtain information such as the softening shrinkage rate of ore materials, gas permeability, and slag melting temperature in a relatively realistic on-site iron-making situation, a general high-temperature smelting furnace needs to consider the weight of pellets due to the stacking of ore materials, and it is common to design a vertical furnace body. At the same time, devices such as load pressurization, softening deformation displacement meters, and gas differential pressure meters are installed above the furnace body. By defining appropriate physical and chemical indicators, for example, the softening temperature is always defined as the temperature at which the shrinkage volume change of iron ore (measured by a displacement meter) exceeds 5%, and the form of high-temperature changes during the smelting process is indirectly and qualitatively recorded. However, since the outside of the furnace body of the vertical high-temperature smelting furnace is covered with heat insulation materials, usually, the reaction situation inside the crucible cannot be directly observed, and it may even take half a day for the crucible to cool down. This not only takes a long time but is also disadvantageous for directly observing and studying the morphological changes of materials during the reaction process. <U+

[0003] <U+ In addition to the vertical furnace body, there are also multiple horizontal high-temperature smelting furnaces. A horizontal high-temperature smelting furnace is provided with a Charge-coupled Device (CCD) camera in the horizontal direction to monitor the high-temperature morphological changes of materials and rapid cooling in real time (for example, the softening temperature is always defined as the temperature at which the shrinkage volume change of iron ore (monitoring the contour change of iron ore using a CCD camera) exceeds 5%) to assist in understanding the high-temperature smelting behavior. However, the horizontal design makes it difficult to install a load pressurization device on the furnace body, and the effect of simulating the weight of the stacked ore materials is lost. Therefore, it is impossible to approach the true airflow reaction situation of metal smelting, and the impact on the high-temperature softening form is very large. The data results obtained by this method lack the value of direct comparison and reference.

[0004] From the above, the conventional high-temperature smelting furnace needs to be improved. [Overview of the project] [Problems that the invention aims to solve]

[0005] The main objective of the present invention is to provide a vertical smelting system in order to solve the technical problems of not being able to rapidly cool high-temperature test samples and the technical problems of not being able to clarify the reaction pathway when the slag phase continuously reacts and changes during the smelting process. [Means for solving the problem]

[0006] To achieve the above objective, an embodiment of the present invention provides a vertical smelting system for metal smelting, including ironmaking, aluminum smelting, copper smelting, and hydrogen metallurgy. The vertical smelting system includes a high-temperature heating device for heating a reaction sample; a reaction sample mounting device detachably connected to the high-temperature heating device and extending downward from the high-temperature heating device, the reaction sample mounting device having a hole at its bottom and for mounting the reaction sample; a reaction product receiving device detachably connected to the reaction sample mounting device and located below the reaction sample mounting device for receiving reaction products obtained by heating the reaction sample; a cooling device located below the high-temperature heating device for cooling the reaction sample or the reaction products; and a transmission device connected to the reaction sample mounting device and the reaction product receiving device, respectively, for moving the reaction sample mounting device relative to the high-temperature heating device and moving the reaction product receiving device relative to the reaction sample mounting device.

[0007] In one embodiment of the present invention, the transmission device includes a first transmission member connected to the reaction sample mounting device for moving the reaction sample mounting device relative to the high-temperature heating device, and a second transmission member connected to the reaction product receiving device for moving the reaction product receiving device relative to the reaction sample mounting device.

[0008] In one embodiment of the present invention, the first transmission member is for moving the reaction sample placement device perpendicular to the high-temperature heating device.

[0009] In one embodiment of the present invention, the first transmission member includes a first guide rail and a first slide block, wherein the first slide block is slidably mounted on the first guide rail, the first slide block is connected to the reaction sample mounting device, and the reaction sample mounting device moves vertically via the sliding of the first slide block along the first guide rail.

[0010] In one embodiment of the present invention, the second transmission member is for moving the reaction product receiving device horizontally relative to the reaction sample placing device.

[0011] In one embodiment of the present invention, the second transmission member includes a second guide rail, a second slide block, and a second carrier, wherein the second slide block is slidably mounted on the second guide rail, the reaction product receiving device is mounted on the second carrier, the second carrier is connected to the second slide block, and the reaction product receiving device moves horizontally via the sliding of the second slide block along the second guide rail.

[0012] In one embodiment of the present invention, the transmission device is for moving the reaction sample placement device from a heating position adjacent to the high-temperature heating device to a cooling position adjacent to the cooling device.

[0013] In one embodiment of the present invention, the cooling device is a gas cooling device.

[0014] In one embodiment of the present invention, the reaction sample placement device is a tubular device in which one end is detachably connected to the high-temperature heating device and the other end is detachably connected to the reaction product receiving device.

[0015] In one embodiment of the present invention, the reaction product receiving device comprises a container and a plurality of reaction product recovery members provided in the container. [Effects of the Invention]

[0016] The beneficial effects of the present invention are that, in addition to retaining all the functions of a conventional vertical smelting furnace, the vertical smelting system of the present invention, through a detachable connection method between the high-temperature heating device, the reaction sample holder, and the reaction product receiving device, allows the reaction sample holder to be separated from the high-temperature heating device at any time via a transmission device during the smelting test process, and can also be moved to a cooling device for high-speed gas quenching. This allows for rapid cooling of the high-temperature reaction sample, as well as separation, cooling, and recovery of the slag phase generated during different reaction periods. This realizes the technical benefits of individual analysis of the slag phase at the initial, middle, and final stages of smelting, and further clarifies the reaction evolution pathway in which the slag phase continuously reacts and changes during the smelting process. [Brief explanation of the drawing]

[0017] [Figure 1] Figure 1 is a schematic diagram of a vertical smelting system according to one embodiment of the present invention. [Figure 2] Figure 2 is another schematic diagram of a vertical smelting system according to an embodiment of the present invention. [Figure 3] Figure 3 is a schematic diagram of a reaction product receiving apparatus for a vertical smelting system according to one embodiment of the present invention. [Figure 4A] Figure 4A is a schematic diagram of the first transmission member of a vertical smelting system according to an embodiment of the present invention. [Figure 4B] Figure 4B is another schematic diagram of the first transmission member of a vertical smelting system according to an embodiment of the present invention. [Figure 5] Figure 5 is a schematic diagram of the second transmission member of a vertical smelting system according to an embodiment of the present invention. [Figure 6] Figure 6 is a schematic diagram of the third transmission member of a vertical smelting system according to an embodiment of the present invention. [Modes for carrying out the invention]

[0018] Hereinafter, referring to the accompanying drawings in the embodiments of the present invention, the technical means in the embodiments of the present invention will be clearly and completely described. Further, in order to better explain the present invention, many specific details are given in the following specific embodiments. Those skilled in the art will understand that the present invention can be similarly implemented without specific details.

[0019] Referring to FIGS. 1 and 2, a vertical smelting system 100 according to an embodiment of the present invention includes a high-temperature heating device 1, a reaction sample placement device 2, a reaction product receiving device 3, and a cooling device 4.

[0020] The reaction sample placement device 2 is for placing a reaction sample. In this embodiment, the reaction sample placement device 2 has a tubular structure, an inner diameter of 50 to 60 mm such as 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60 mm, a height of 15 to 30 cm such as 15, 20, 25, 30 cm, one end is detachably connected to the high-temperature heating device 1, and it is a crucible extending downward from the high-temperature heating device 1. The crucible has a hole 21 at the bottom, and the reaction product obtained by heating the reaction sample by the high-temperature heating device 1 can fall through the hole into the reaction product receiving device 3 and be collected by the reaction product receiving device 3.

[0021] Referring to FIGS. 1 to 3, the reaction product receiving device 3 is located below the reaction sample placing device 2 and has a main container 31, an inlet 32, and six reaction product recovery members 33. The inlet 32 is formed at the top of the main container 31 and communicates with the inside of the main container 31. The six reaction product recovery members 33 are provided annularly in the main container 31 for receiving reaction products. One of the six reaction product recovery members 33 can be aligned and communicated with the inlet 32 by rotation. The reaction product receiving device 3 is detachably connected to the other end of the reaction sample placing device 2 through one end of a hollow communication member C, the other end of the hollow communication member C is connected to the inlet 32, and is aligned and communicated with one of the six reaction product recovery members 33. Of course, the number of reaction product recovery members in the present invention is not limited to six. In other embodiments, the number of reaction product recovery members may be increased or decreased according to the situation, for example, according to the temperature range of the recovery target, and the installation method is not limited to being annular.

[0022] Referring to FIGS. 1 and 2, the cooling device 4 is located below the high-temperature heating device 1. The cooling device 4 achieves the effect of rapid cooling by discharging cooling gas at a speed exceeding 150 °C / min, such as 150, 155, 160, 165, 170, 175, 180 °C / min.

[0023] Referring to Figures 1 and 2, the transmission device is connected to the reaction sample holder 2 and the reaction product receiving device 3, respectively, and is used to move the reaction sample holder 2 relative to the high-temperature heating device 1 and to move the reaction product receiving device 3 relative to the reaction sample holder 2. Specifically, the transmission device includes a first transmission member 5 and a second transmission member 6, the first transmission member 5 being connected to the reaction sample holder 2, and for vertically moving the reaction sample holder 2 between the high-temperature heating device 1 and the cooling device 4. Referring to Figures 4A and 4B, the first transmission member 5 is further a pneumatic guide rail including a first guide rail 51 and a first slide block 52, the first slide block 52 being slidably mounted on the first guide rail 51 and connected to the end of the reaction sample holder 2, the first slide block 52 sliding vertically along the first guide rail 51 to move the reaction sample holder 2 vertically.

[0024] The second transmission member 6 is connected to the reaction product receiving device 3 and is used to move the reaction product receiving device 3 horizontally between being connected to or not connected to the reaction sample mounting device 2. Referring to Figure 5, the second transmission member 6 is further a pneumatic guide rail and includes a second guide rail 61, a second slide block 62, and a second carrier 63. The second slide block 62 is slidably mounted on the second guide rail 61, the second carrier 63 is a substantially rectangular frame with a hollow bottom, the second mounting frame 631 is mounted on the bottom of the second carrier 63 and is approximately midway along the bottom of the second carrier 63, and the reaction product receiving device 3 is mounted on the second mounting frame 631. The bottom of the second carrier 63 is connected to the second slide block 62, and the second slide block 62 slides horizontally along the second guide rail 61, moving the reaction product receiving device 3 horizontally.

[0025] Referring to Figure 6, the transmission device may optionally include a third transmission member 7 connected to the high-temperature heating device 1 for vertical movement of the high-temperature heating device 1. The third transmission member 7 is a pneumatic guide rail and includes a third guide rail 71, a third slide block 72, and a third carrier 73. The third slide block 72 is slidably mounted on the third guide rail 71, the third carrier 73 is a substantially rectangular frame with a hollow bottom, and a third mounting frame 731 is provided at the bottom of the third carrier 73 and is substantially midway along the bottom of the third carrier 73, and the high-temperature heating device 1 is mounted on the third mounting frame 731. The sides of the third carrier 73 are connected to the third slide block 72, and the third slide block 72 slides vertically along the third guide rail 71 to move the high-temperature heating device 1 vertically, facilitating maintenance and parts replacement of the high-temperature heating device 1.

[0026] The method of metal smelting using the vertical smelting system of the present invention involves placing a reaction sample in a reaction sample holder 2, connecting the reaction sample holder 2 to a high-temperature heating device 1 via a transmission device, heating the reaction sample via the high-temperature heating device 1, and simultaneously connecting the reaction sample holder 2 to a reaction product receiving device 3 located below it. That is, while the reaction sample is being heated, the high-temperature heating device 1, the reaction sample holder 2, and the reaction product receiving device 3 are connected. The reaction product (liquid substance) generated by heating the reaction sample falls from a hole at the bottom of the reaction sample holder 2 into a reaction product recovery member 33 that communicates with the reaction sample holder 2. By rotating the reaction product receiving device 3, the reaction sample holder 2 is connected to other reaction product recovery members 33, and reaction products from multiple temperature ranges can be recovered using different reaction product recovery members 33. Furthermore, at any point in the smelting process or at the end of the process, the reaction sample holder 2 can be moved downwards away from the high-temperature heating device 1 via the first transmission member 5 to the cooling device 4 for cooling, and optionally cooled below its melting point. The method by which the reaction sample holder 2 moves to the cooling device 4 is as follows: first, the reaction product receiving device 3 is disconnected from the reaction sample holder 2 and moves horizontally away from the cooling device 4 via the second transmission member 6; then, the reaction sample holder 2 is lowered near the cooling device 4 via the first transmission member 5, and the cooling device 4 cools the entire reaction sample holder 2, for example, by injecting a cooling gas.

[0027] The following are further examples illustrating the method of metal smelting and data analysis using the vertical smelting system of the present invention, but these examples are not intended to limit the present invention, and those skilled in the art can make various modifications and changes without departing from the spirit and scope of the invention. [Examples]

[0028] [Iron smelting process] The reaction samples are stacked and placed in a reaction sample mounting device. The reaction samples mainly consist of iron ore and coke, which may be hematite (Fe2O3), magnetite (Fe3O4), and / or wustite (FeO), and may also contain oxides such as silicon, aluminum, and calcium. The stacking method involves sandwiching iron ore between two layers of coke.

[0029] The process conditions are as follows; please refer to Table 1.

[0030] To simulate the actual blast furnace steelmaking process, the following parameters were set: From 250 to 900°C, 9 L / min of N2, 3.75 L / min of CO, and 2.25 L / min of CO2 were introduced at a stable heating rate (10°C / min). From 900 to 1200°C, 9 L / min of N2 and 6 L / min of CO were introduced at a stable heating rate (2°C / min). From 1200 to 1600°C, 9 L / min of N2 and 6 L / min of CO were introduced at a stable heating rate (5°C / min).

[0031] [Table 1]

[0032] Using six reaction product recovery members, reaction products were recovered in six temperature ranges: 1000-1100°C, 1100-1200°C, 1200-1300°C, 1300-1400°C, 1400-1500°C, and 1500-1600°C.

[0033] After the test is completed at 1600°C, the reaction sample holder is moved to the cooling device via a transmission device to cool, and the temperature of the reaction sample in the reaction sample holder needs to be reduced to below 1000°C within 4 minutes after the end of the test to solidify. The reaction product receiving device is physically moved in parallel via a transmission device and removed independently, and the six reaction product recovery members are removed one by one, and the reaction products in the six reaction product recovery members are extracted and weighed individually.

[0034] [Analysis and results of test data] Based on the chemical composition of the reaction sample, theoretically, the total amount of molten iron and slag produced by the reaction sample is as follows: m0=w0x{[TFe]+[SiO2]+[MgO]+[CaO]+[Al2O3]} m0 is the total amount of molten iron and slag. w0 is the weight of the reaction sample. [TFe] represents the TFe content of the sample.

[0035] The following data is an indicator of the conversion from iron ore to molten pig iron. (1) (Hot metal) Meltdown ratio Meltdown ratio = md / m0 (2) Softening temperature Ts The gas differential pressure is greater than that of 100 mmHg of H2O, and the temperature closest to the temperature corresponding to 100 mmHg of H2O is selected. (3) Melting temperature Tm The temperature at which the change in sample height almost stops (the change in sample height is less than 0.02 mm for every 1°C increase in the test temperature) is determined. (4) Air permeability resistance (S-value) The integral of temperature due to the gas pressure difference between Ts and Tm. (5) High temperature air permeability resistance (High Temp. S-value) The integral of temperature due to gas pressure difference between 1560°C and 1580°C.

[0036] The results are shown in Table 2. [Table 2]

[0037] In summary, the vertical smelting system of the present invention retains all the functions of a conventional vertical smelting furnace, and, through a detachable connection method between the high-temperature heating device, the reaction sample holder, and the reaction product receiving device, allows the reaction sample holder to be separated from the high-temperature heating device at any time via a transmission device during the smelting test process, and can also be moved to a cooling device for high-speed gas quenching. This allows for rapid cooling of the high-temperature reaction sample, as well as separation, cooling, and recovery of the slag phase generated during different reaction periods. This enables the technical effectiveness of individual analysis of the slag phase at the initial, middle, and final stages of smelting, and further clarifies the reaction evolution pathway through which the slag phase continuously reacts and changes during the smelting process.

[0038] Although the present invention is disclosed in preferred embodiments, this is not intended to restrict the invention, and various modifications and modifications can be made by those skilled in the art without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention is deemed to be defined by the appended claims. [Explanation of Symbols]

[0039] 100 Vertical Smelting Systems 1 High temperature heating device 2. Reaction sample placement device 3. Reaction product receiving apparatus 31 bottles 32 Entrance 33 Reaction product recovery member 4 Cooling device 5. First transmission member 51 First guide rail 52. First slide block 6. Second transmission member 61. Second guide rail 62. Second slide block 63 Second Carrier 631 Second mounting frame 7 Third transmission member 71 Third guide rail 72. Third slide block 73 Third Responsible Party 731 Third mounting frame C Hollow communication member

Claims

1. A high-temperature heating device for heating the reaction sample, A reaction sample mounting device detachably connected to the high-temperature heating device and extending downward from the high-temperature heating device, the reaction sample mounting device having a hole at its bottom for mounting the reaction sample, A reaction product receiving device is detachably connected to the reaction sample placement device, located below the reaction sample placement device, and is for receiving the reaction product obtained by heating the reaction sample. A cooling device located below the high-temperature heating device for cooling the reaction sample or the reaction product, A vertical smelting system comprising a transmission device connected to the reaction sample holder and the reaction product receiving device, respectively, for moving the reaction sample holder relative to the high-temperature heating device in order to heat or cool the reaction sample, and for moving the reaction product receiving device relative to the reaction sample holder in order to receive or remove the reaction product.

2. The vertical smelting system according to claim 1, wherein the transmission device includes a first transmission member connected to the reaction sample placement device for moving the reaction sample placement device relative to the high-temperature heating device, and a second transmission member connected to the reaction product receiving device for moving the reaction product receiving device relative to the reaction sample placement device.

3. The vertical smelting system according to claim 2, wherein the first transmission member is for moving the reaction sample placement device perpendicular to the high-temperature heating device.

4. The vertical smelting system according to claim 3, wherein the first transmission member includes a first guide rail and a first slide block, the first slide block is slidably mounted on the first guide rail, the first slide block is connected to the reaction sample mounting device, and the reaction sample mounting device moves vertically via the sliding of the first slide block along the first guide rail.

5. The vertical smelting system according to claim 2, wherein the second transmission member is for moving the reaction product receiving device horizontally relative to the reaction sample placing device.

6. The vertical smelting system according to claim 5, wherein the second transmission member includes a second guide rail, a second slide block, and a second carrier, the second slide block being slidably mounted on the second guide rail, the reaction product receiving device being mounted on the second carrier, the second carrier being connected to the second slide block, and the reaction product receiving device moving horizontally via the sliding of the second slide block along the second guide rail.

7. The vertical smelting system according to claim 1, wherein the transmission device is for moving the reaction sample placement device from a heating position adjacent to the high-temperature heating device to a cooling position adjacent to the cooling device.

8. The vertical smelting system according to claim 1, wherein the cooling device is a gas cooling device.

9. The vertical smelting system according to claim 1, wherein the reaction sample placement device is a tubular device having one end detachably connected to the high-temperature heating device and the other end detachably connected to the reaction product receiving device.

10. The vertical smelting system according to claim 1, wherein the reaction product receiving device comprises a container and a plurality of reaction product recovery members provided in the container.

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