A device for blast furnace slag desulfurization experiment

Abstract

This utility model discloses an apparatus for blast furnace slag desulfurization experiments, including a graphite crucible one and a graphite crucible two. A processing component and a connecting component are provided between the graphite crucible one and the graphite crucible two. By setting the processing component, the process of molten iron dripping through the slag can be simulated, and the iron-slag ratio can be kept stable during the experiment. This solves the technical problem of iron-slag ratio imbalance caused by molten iron dripping in traditional single-hole crucible experiments, which affects the accuracy of experimental results. It improves the reliability of experimental data and helps to study the blast furnace slag desulfurization process more accurately. Compared with the traditional use of single-hole crucibles for simulating blast furnace desulfurization experiments, not only is the overall experimental cycle significantly shortened, but the number of crucibles used is also significantly reduced, thereby effectively reducing the experimental cost. By setting the connecting component, a stable connection between the graphite crucible one and the graphite crucible two is achieved.

Description

Technical Field

[0001] This utility model relates to the field of physical and chemical testing technology, and more specifically, to a device for blast furnace slag desulfurization experiments. Background Technology

[0002] Sulfur is a harmful element in steel products, and desulfurization is an important task in the ironmaking process. Furthermore, the sulfur content in pig iron is a key indicator of its quality. The use of high-alumina iron ore results in a higher Al2O3 content in blast furnace slag, leading to increased slag viscosity, decreased fluidity, and reduced desulfurization capacity. The desulfurization reaction is a process of ion migration at the slag-iron interface. It can be considered that atomic sulfur, originally neutral in molten iron, gains electrons from the slag at the slag-iron interface and transforms into sulfur (S). 2 - Entering the slag, the oxygen anions (O2-) in the slag lose electrons at the slag-iron interface and become neutral atomic oxygen, which then enters the molten iron.

[0003] According to the chemical equilibrium method, a special double-layer graphite crucible is used to simulate the process of molten iron dripping through slag. However, the experiment requires repeated large-scale experiments, which greatly increases the experimental cost. Furthermore, in the high-temperature experiment, the use of a special double-layer graphite crucible to simulate the process of molten iron dripping through slag causes a serious imbalance in the slag-to-iron ratio before and after the experiment, thus affecting the accuracy of the experimental results.

[0004] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0005] In view of the problems in the related technologies, this utility model proposes a device for blast furnace slag desulfurization experiments to overcome the above-mentioned technical problems existing in the existing related technologies.

[0006] Therefore, the specific technical solution adopted by this utility model is as follows:

[0007] An apparatus for blast furnace slag desulfurization experiments includes a graphite crucible one and a graphite crucible two. A processing component and a connecting component are disposed between the graphite crucible one and the graphite crucible two. The processing component includes a processing part disposed on the graphite crucible one and the graphite crucible two. The connecting component includes a connecting part and a sealing part disposed at one end of the graphite crucible one and the graphite crucible two respectively. The sealing part is disposed at one end of the graphite crucible one.

[0008] Furthermore, the processing component includes slot one and slot two, which are respectively formed at equal distances at one end of graphite crucible one and graphite crucible two.

[0009] Furthermore, the inner wall of the first groove is provided with a drip hole, and the first graphite crucible is connected to the second graphite crucible through the drip hole.

[0010] Furthermore, the connecting component includes connecting protrusions, which are fixedly arranged at equal intervals at the bottom end of the graphite crucible one. One end of the graphite crucible two is provided with connecting ports at equal intervals, and the connecting protrusions are adapted to the connecting ports. The inner wall of the connecting ports is provided with sliding grooves.

[0011] Furthermore, the connecting protrusion is located inside the sliding groove, and the connecting protrusion is adapted to the sliding groove.

[0012] Furthermore, the sealing component includes a threaded groove, which is formed on the inner wall of the drip hole. A graphite plug rod is threadedly connected to the threaded groove, and a sealing cap is provided on the graphite plug rod, with the sealing cap located at one end of the groove.

[0013] The beneficial effects of this utility model are as follows:

[0014] (1) By setting up the processing components, it is possible to simulate the process of molten iron dripping through the slag, and the iron-slag ratio can be kept stable during the experiment. This solves the technical problem of the iron-slag ratio being out of balance due to molten iron dripping and affecting the accuracy of the experimental results in the traditional single-hole crucible experiment. It improves the reliability of the experimental data and helps to study the desulfurization process of blast furnace slag more accurately. Compared with the traditional use of single-hole crucibles to simulate blast furnace desulfurization experiments, not only is the overall experimental cycle greatly shortened, but the number of crucibles used is also significantly reduced, thereby effectively reducing the experimental cost.

[0015] (2) By setting up the connecting components, a stable connection between graphite crucible one and graphite crucible two is achieved. At the same time, the threaded groove in the sealing component cooperates with the graphite plug rod to ensure the sealing of the drip hole, effectively preventing gas leakage under high temperature experimental conditions, ensuring the stability and safety of the experimental environment, providing reliable hardware support for the experiment, thereby improving the overall quality and repeatability of the experiment. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of an apparatus for blast furnace slag desulfurization experiment according to an embodiment of the present utility model;

[0018] Figure 2 This is an exploded structural diagram of an apparatus for blast furnace slag desulfurization experiments according to an embodiment of the present invention.

[0019] Figure 3 This is a side sectional view of the processing component structure of an apparatus for blast furnace slag desulfurization experiment according to an embodiment of the present utility model;

[0020] Figure 4 This is a partial structural side view of the connecting assembly of an apparatus for blast furnace slag desulfurization experiments according to an embodiment of the present invention. Figure 1 ;

[0021] Figure 5 This is a partial structural side view of the connecting assembly of an apparatus for blast furnace slag desulfurization experiments according to an embodiment of the present invention. Figure 2 ;

[0022] Figure 6 This is a partial exploded view of the connecting component of an apparatus for blast furnace slag desulfurization experiments according to an embodiment of the present invention.

[0023] In the picture:

[0024] 1. Graphite crucible one; 2. Graphite crucible two; 3. Processing component; 4. Connecting component; 5. Sealing component; 6. Groove one; 7. Groove two; 8. Drop hole; 9. Connecting protrusion; 10. Connecting port; 11. Sliding groove; 12. Threaded groove; 13. Graphite stopper rod; 14. Sealing cap. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1:

[0027] like Figures 1-3 As shown, an apparatus for desulfurization experiment of blast furnace slag according to an embodiment of the present utility model includes a graphite crucible 1 and a graphite crucible 2. A processing component is provided between the graphite crucible 1 and the graphite crucible 2. The processing component includes a processing part 3, which is disposed on the graphite crucible 1 and the graphite crucible 2.

[0028] Graphite crucible 1 has four radially evenly spaced cylindrical slots. Graphite crucible 1 is a cylinder with a diameter of 16-20 cm and a height of 12-14 cm. Slot 6 has a diameter of 4-5 cm and a depth of 10-12 cm. Graphite crucible 2 is a cylinder with a diameter of 16-20 cm and a height of 8-10 cm. Slot 7 has a diameter of 4-5 cm and a depth of 6-8 cm.

[0029] The processing component 3 includes a first groove 6 and a second groove 7. The first groove 6 and the second groove 7 are respectively opened at equal distances at one end of the graphite crucible 1 and the graphite crucible 2. The inner wall of the first groove 6 is provided with a drip hole 8, which has a diameter of 1-1.5cm and a depth of 1-2cm. The graphite crucible 1 is connected to the graphite crucible 2 through the drip hole 8.

[0030] Example 2:

[0031] like Figures 1-2 , Figures 4-6 As shown, according to an embodiment of the present invention, an apparatus for blast furnace slag desulfurization experiment is provided between graphite crucible 1 and graphite crucible 2. The connecting assembly includes a connecting component 4 and a sealing component 5. The connecting component 4 is respectively provided at one end of graphite crucible 1 and graphite crucible 2, and the sealing component 5 is provided at one end of graphite crucible 1.

[0032] The connecting component 4 includes a connecting protrusion 9, which is made of graphite. The connecting protrusion 9 is fixedly arranged at equal intervals at the bottom end of the graphite crucible 1. One end of the graphite crucible 2 is provided with connecting ports 10 at equal intervals, and the connecting protrusion 9 is adapted to the connecting ports 10. The inner wall of the connecting port 10 is provided with a sliding groove 11, and the connecting protrusion 9 is arranged inside the sliding groove 11 and is adapted to the sliding groove 11.

[0033] The sealing component 5 includes a threaded groove 12, which is formed on the inner wall of the drip hole 8. A graphite plug rod 13 is threadedly connected to the threaded groove 12. A sealing cap 14 is provided on the graphite plug rod 13 and is located at one end of the hole groove 6.

[0034] Example 3:

[0035] Before the experiment began, iron (300g) and slag (100g) were sampled in a 3:1 ratio. Iron (300g) was placed in four radially evenly spaced slots (6) of graphite crucible 1, and slag (100g) was placed in four radially evenly spaced slots (7) of graphite crucible 2. The specially designed double-layered graphite crucibles were then placed into the high-temperature tube furnace, and the valve was tightened using graphite stopper rod 13. After the slag and iron samples melted, the graphite stopper rod in crucible 1 was opened. Stopper rod 13 is used to allow molten iron to flow from dripping hole 8 into the corresponding groove 7 of graphite crucible 2, pass through the slag layer, and then flow to the bottom of the lower graphite crucible 2 and deposit. This simulates the process of molten iron dripping through the slag. Sampling times are set to 15 min, 20 min, 25 min, and 30 min. When the reaction reaches the preset time, iron samples are extracted with quartz tubes and rapidly cooled with oil to preserve the original state of the slag and iron at the end of the reaction. High-purity argon gas is introduced for protection during the experiment, and the sulfur content in the slag and iron is analyzed.

[0036] The following table shows the statistical results of the simulated blast furnace desulfurization experiment conducted using this embodiment and the single-hole special graphite crucible:

[0037] Table 1 Comparison of Experimental Period and Graphite Crucible Usage

[0038]

[0039]

[0040] Table 2 Changes in chemical composition before and after the experiment

[0041]

[0042] As shown in Table 1, using the special double-layer graphite crucible of this embodiment reduces the overall experimental cycle by 3 hours and the number of crucibles used by 3 compared to using a traditional crucible in the simulated blast furnace desulfurization experiment. As shown in Table 2, when using the special double-layer graphite crucible of this embodiment, the ratio of iron (300g) to slag (100g) remained at 3:1 at sampling times of 15min, 20min, 25min, and 30min, consistent with the pre-experiment ratio. However, when using a traditional crucible, the ratio of iron (300g) to slag (100g) at sampling times of 15min, 20min, 25min, and 30min were 3:1, 2.9:1.2, 2.7:1.1, and 3.1:1.3, respectively, resulting in a significant change in the slag-iron ratio before and after the experiment, which in turn affected the accuracy of the experimental data.

[0043] To facilitate understanding of the above-mentioned technical solutions of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below.

[0044] In summary, using the above-mentioned technical solution of this utility model, iron (300g) and slag (100g) are sampled in a ratio of 3:1 and placed into graphite crucible 1 and graphite crucible 2 respectively. Graphite crucible 1 has four radially evenly spaced slots 6, and the inner wall of slots 6 is provided with drip holes 8. Graphite crucible 2 has radially evenly spaced slots 7. The specially made double-layer graphite crucibles are placed in a high-temperature tube furnace in sequence, and the switch is tightened with a graphite stopper 13. After the slag and iron samples are melted, the graphite stopper 13 used in graphite crucible 1 is opened, so that the molten iron flows from the drip holes 8 into the corresponding slots 7 of graphite crucible 2, passes through the slag layer, and flows to the bottom of the lower graphite crucible 2 and deposits. This simulates the process of molten iron dripping through the slag. Sampling times were set to 15 min, 20 min, 25 min, and 30 min. When the reaction reached the preset time, iron samples were extracted using quartz tubes and rapidly cooled with oil to preserve the original state of the slag and iron at the end of the reaction. High-purity argon gas was introduced for protection during the experiment. The sulfur content in the slag and iron was analyzed, which simulated the process of molten iron dripping through the slag. This maintained the stability of the iron-slag ratio during the experiment, improved the reliability of the experimental data, and effectively reduced the experimental cost.

[0045] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An apparatus for blast furnace slag desulfurization experiments, comprising a graphite crucible one (1) and a graphite crucible two (2), characterized in that, A processing component and a connecting component are provided between graphite crucible one (1) and graphite crucible two (2). The processing component includes a processing part (3), which is disposed on graphite crucible one (1) and graphite crucible two (2). The connecting component includes a connecting part (4) and a sealing part (5). The connecting part (4) is disposed at one end of graphite crucible one (1) and graphite crucible two (2), respectively, and the sealing part (5) is disposed at one end of graphite crucible one (1).

2. The apparatus for blast furnace slag desulfurization experiments according to claim 1, characterized in that, The processing component (3) includes a first hole (6) and a second hole (7), which are respectively opened at equal distances at one end of the graphite crucible (1) and the graphite crucible (2).

3. The apparatus for blast furnace slag desulfurization experiments according to claim 2, characterized in that, The inner wall of the groove one (6) is provided with a drip hole (8), and the graphite crucible one (1) is connected to the graphite crucible two (2) through the drip hole (8).

4. The apparatus for blast furnace slag desulfurization experiments according to claim 3, characterized in that, The connecting component (4) includes a connecting protrusion (9), which is fixedly arranged at the bottom of the graphite crucible one (1) at equal distances. A connecting port (10) is provided at one end of the graphite crucible two (2) at equal distances. The connecting protrusion (9) is adapted to the connecting port (10). A sliding groove (11) is provided on the inner wall of the connecting port (10).

5. The apparatus for blast furnace slag desulfurization experiments according to claim 4, characterized in that, The connecting protrusion (9) is located inside the sliding groove (11), and the connecting protrusion (9) is adapted to the sliding groove (11).

6. The apparatus for blast furnace slag desulfurization experiments according to claim 3, characterized in that, The sealing component (5) includes a threaded groove (12), which is formed on the inner wall of the drip hole (8). The threaded groove (12) is threadedly connected to a graphite plug rod (13), and a sealing cap (14) is provided on the graphite plug rod (13). The sealing cap (14) is located at one end of the hole groove (6).

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