Calcium aluminate melting tank and calcium aluminate furnace

Abstract

The invention belongs to the technical field of calcium aluminate furnaces, and relates to a calcium aluminate melting tank and a calcium aluminate furnace with the calcium aluminate melting tank. The first cooling box arranged on the periphery of the wall of the melting tank is used for continuously cooling the wall of the melting tank, reaction erosion of calcium aluminate melt to refractory bricks at the position of a liquid level line of the wall of the melting tank is reduced, scouring of the calcium aluminate melt to the refractory bricks on the wall of the melting tank is reduced, and the refractory bricks on the wall of the melting tank are protected; and the second cooling box on the periphery of the material flowing opening of the melting tank is used for continuously cooling the material flowing opening, so that reaction erosion and scouring of calcium aluminate melt to the material flowing opening are reduced, and bricks at the material flowing opening are protected.

Description

Calcium aluminate melting pool and calcium aluminate furnace Technical Field

[0001] The invention relates to a calcium aluminate melting pool and a calcium aluminate furnace having the melting pool, belonging to the technical field of calcium aluminate furnaces. Background Art

[0002] Calcium aluminate is an inorganic compound that is widely used in water treatment, steelmaking slag removal, ceramic / cement preparation and other fields.

[0003] The traditional calcium aluminate production process involves sintering calcium aluminate raw materials (such as calcium oxide and aluminum oxide) at high temperatures in a rotary kiln. Later, a new process for producing calcium aluminate using a molten process was proposed. The calcium aluminate raw materials (aluminum ash, limestone, and a grade regulator) are mixed and added to the melting tank of a calcium aluminate furnace. High temperatures cause the molten calcium aluminate raw materials to react and form a molten calcium aluminate solution, which flows out through a discharge port and is ultimately cooled to obtain the finished calcium aluminate product. This new calcium aluminate production process eliminates the need for high-temperature sintering in a rotary kiln. More importantly, the following key points apply: ① Aluminum ash will be listed as hazardous waste by the National Environmental Protection Agency on January 1, 2022. Calcium aluminate produced by the sintering process will not meet national standards for leaching tests, but calcium aluminate produced by the fusion process will fully meet national standards for leaching tests. ② Molten calcium aluminate melts into molten steel quickly and in a short time. Its energy-saving effects and improved steel quality are unmatched by calcium aluminate produced by the traditional sintering process.

[0004] However, this new production process has new problems in practical application:

[0005] Because the high-temperature calcium aluminate melt infiltrates the refractory materials of the melting pool walls and the spout, it easily penetrates into the refractory materials, causing a strong corrosive effect on the refractory materials. The liquid level of the melting pool walls and the spout refractory materials are eroded and washed away in a very short time. The melting pool walls made of fused zirconium corundum bricks usually corrode and perforate the liquid level after about 15 days of use. The damage caused by erosion and perforation is catastrophic - the melt at around 1600℃ flows directly from high altitude to the ground, and the flow rate is increasing, causing devastating damage to the ground and the equipment on it, directly resulting in huge economic losses. The spout bricks will corrode and be washed away in 2-3 days, requiring frequent replacement of spout bricks, which is very costly to repair and maintain.

[0006] Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art and provide a calcium aluminate melting pool with greatly extended service life, and at the same time provide a calcium aluminate furnace having the melting pool.

[0008] The calcium aluminate melting pool described in the present invention has a flow port at the front end of the melting pool body; except for the pool wall below the flow port, a first cooling box is arranged on the outer periphery of the melting pool wall at other positions; the height of the first cooling box is not lower than the flow channel height of the flow port; a medium cooling device is provided, and the cooling medium in the medium cooling device is transported to the first cooling box through the total circulation cooling liquid pipeline, and the cooling medium flowing out of the first cooling box is transported back to the medium cooling device through the total circulation return liquid pipeline.

[0009] The present invention continuously cools the melting pool wall through a first cooling box. On the one hand, it reduces the surface temperature of the calcium aluminate melt, and to a certain extent reduces the reaction and erosion of the calcium aluminate melt on the refractory bricks at the liquid level position of the melting pool wall (i.e., the position where the calcium aluminate melt contacts the air), thereby effectively protecting the liquid level position of the melting pool wall. On the other hand, it can form a layer of semi-solidified calcium aluminate on the surface of the calcium aluminate melt and the contact surface between the calcium aluminate melt and the melting pool wall, realizing micro-flow, greatly reducing the scouring of the refractory bricks of the pool wall by the calcium aluminate melt, playing a good protective role for the refractory bricks of the pool wall, and significantly extending the service life of the melting pool wall. The cooling medium is continuously circulated and cooled by the medium cooling device, thereby achieving the effect of protecting the pool wall bricks.

[0010] In addition, the first cooling box is arranged on the periphery of the melting pool wall, that is, the structures of the first cooling box and the melting pool wall are independent of each other, so when the melting pool wall is corroded, the pool wall bricks can be replaced more conveniently.

[0011] The melting pool wall adopts a split design, which includes an upper pool wall, a support brick and a lower pool wall; the first cooling box is a cooling box with a stepped cross-section, and a stepped assembly surface is provided on its upper side close to the melting pool. The stepped assembly surface is flush with the upper end surface of the lower pool wall. Each support brick is sandwiched between the lower pool wall and the upper pool wall, with its inner end located on the upper end surface of the lower pool wall and its outer end located on the stepped assembly surface; the height of the support brick is not lower than the flow channel height of the flow port.

[0012] By adopting this split design and adopting a stepped (offset) design for the first cooling box, when the lower tank wall is eroded near the first cooling box, the support bricks will support the upper tank wall upward, ensuring the upper tank wall's structural stability and preventing it from collapsing into the kiln. Only the eroded refractory bricks of the lower tank wall need to be replaced, and the upper and lower tank walls do not affect each other, making this design more reasonable for long-term use. Even if the refractory material of the lower tank wall is completely eroded, the first cooling box (as long as the cooling medium is continuously supplied) can still serve as the melting tank wall. Because the calcium aluminate melt forms a solid protective film when it cools, normal production will not be affected, and catastrophic production accidents will not occur. In addition, the melting tank can continue to be used for up to 8 months, which is 16 times the service life of traditional calcium aluminate melting tanks.

[0013] The first cooling box of the present invention is made of corrosion-resistant materials such as stainless steel and copper. Stainless steel is preferably 310S stainless steel or 316L stainless steel. To reduce investment costs, other steel materials or ordinary steel may also be used. The support bricks may be made of high-chrome bricks, chrome corundum bricks, zirconium corundum bricks, and other materials.

[0014] Preferably, the first cooling box is composed of a plurality of independent boxes arranged side by side in a horizontal arrangement. Each box is arranged around the wall of the melting pool. The flow rate of the cooling medium flowing into each box is independently controlled. There is a gap between adjacent boxes, and a high-temperature castable is cast in the gap to form the overall structure. The high-temperature castable can be a zirconium castable, for example.

[0015] Further preferably, each box has an open top, and is provided with a coolant line I extending from the top opening into the box bottom. Each coolant line I is connected to the main circulating coolant line, and a control valve I is installed on each coolant line I. A high-level overflow port I is provided on the side wall of each box, connected to the main circulating return line via a pipe I. Cooling medium is distributed from the main circulating coolant line to each coolant line I, which then flows into the bottom of the corresponding box. The flow rate of the cooling medium in each box is individually controlled by a control valve I. Low-temperature cooling medium enters the box from the bottom and flows upward, cooling the corresponding melt pool walls. The heated cooling medium then overflows through the high-level overflow port I and is transported back to the medium cooling device via pipe I and the main circulating return line, where it is cooled and recycled. The box has an open top, and during use, each box is pressure-free and poses no risk.

[0016] In order to improve the structural stability of the first cooling box, each box body is fixedly connected to the steel frame.

[0017] Preferably, a second cooling box is arranged around the flow port, and the second cooling box includes a front box body and two side box bodies; the two side box bodies are arranged on both sides of the wall bricks on the left and right sides of the flow port along the discharge direction, and the upper ends of the two side box bodies are open; a cooling liquid pipeline II is provided on at least one side of the side box body, and the cooling liquid pipeline II extends into the bottom of the side box body from the top opening, and the cooling liquid pipeline II is connected to the total circulation cooling liquid pipeline, and a control valve II is installed on the cooling liquid pipeline II; a high-level overflow port II is provided on the side wall of at least the other side of the side box body, and the high-level overflow port II is connected to the total circulation return liquid pipeline through the pipeline II; the front box body is arranged directly in front of the lower pool wall of the flow port, and it is connected to the two side box bodies. As the calcium aluminate melt flows out of the flow port, the two side boxes and the front box cool the flow port, improving cooling efficiency and achieving a better cooling effect. This can reduce the reaction erosion and scouring of the flow port by the calcium aluminate melt, protecting the flow port bricks and extending their service life by more than 8 months. At the same time, the temperature of the calcium aluminate melt flowing out of the flow port is reduced, facilitating the calcium aluminate molding process in the next step, and can also increase the density of the product, reduce the porosity of the product, and improve the overall product quality.

[0018] Preferably, the second cooling box further comprises a bottom box, which is located at the bottom of the melt pool corresponding to the flow port and communicates with the front box. The second cooling box comprises the bottom box, the front box, and the two side boxes, forming a large cooling system that fully cools the flow port, further improving cooling efficiency.

[0019] Preferably, the upper parts of the two side boxes are connected by a connecting structure to form an integral structure to ensure the stability of the structure. Further preferably, the connecting structure adopts a connecting pipe to connect the two side boxes through the connecting pipe, which can play a role in medium circulation and maintaining structural stability.

[0020] In the present invention, the melting pool wall is preferably constructed of non-shrinkage fused zirconium corundum bricks, which are resistant to erosion and corrosion and have a longer service life. The flow port bricks are preferably made of chrome corundum bricks, which are resistant to erosion and corrosion.

[0021] The calcium aluminate furnace of the present invention has the above-mentioned calcium aluminate melting pool.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention continuously cools the melting pool wall through the first cooling box, thereby reducing the reaction erosion of the calcium aluminate melt on the refractory bricks at the liquid level of the melting pool wall. At the same time, a layer of semi-solidified calcium aluminate is formed on the surface of the calcium aluminate melt and the contact surface between the calcium aluminate melt and the melting pool wall, realizing micro-flow, greatly reducing the scouring of the refractory bricks of the pool wall by the calcium aluminate melt, playing a good protective role for the refractory bricks of the pool wall, and significantly extending the service life.

[0024] 2. The melting pool wall of the present invention adopts a split design and the first cooling box adopts a stepped design. When the lower pool wall is eroded near the first cooling box, the support bricks will support the upper pool wall upward to ensure that the upper pool wall structure is stable and will not collapse into the kiln. Only the eroded refractory bricks of the lower pool wall need to be replaced. Even if the refractory material of the lower pool wall is completely eroded, the first cooling box can still serve as the melting pool wall, which will not affect normal production and will not cause catastrophic production accidents.

[0025] 3. A second cooling box is set on the periphery of the flow port of the melting pool, which can continuously cool the flow port, reduce the reaction erosion and scouring of the flow port by the calcium aluminate melt, and protect the flow port bricks. At the same time, the temperature of the calcium aluminate melt flowing out of the flow port is reduced, which is convenient for the calcium aluminate molding in the next process, increases the product density, reduces the product porosity, and improves the overall product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] FIG1 is a schematic structural diagram of a calcium aluminate melting pool according to Example 1;

[0027] FIG2 is a schematic structural diagram of the calcium aluminate melting pool wall after being eroded according to Example 1;

[0028] FIG3 is a schematic diagram of the structure of the upper wall of the melting pool collapsed after the wall of the melting pool was eroded without the split design;

[0029] 4 is a schematic diagram showing the connection between the first cooling box and the medium cooling device in the calcium aluminate melting pool according to Example 2;

[0030] FIG5 is a schematic structural diagram of the box body in the second embodiment;

[0031] FIG6 is a schematic structural diagram of the calcium aluminate melting pool described in Example 3;

[0032] FIG7 is a left side view of the second cooling box in FIG6;

[0033] FIG8 is a schematic structural diagram of the second cooling box in Example 3;

[0034] FIG9 is a cross-sectional view taken along line AA of the flow port in FIG6 ;

[0035] FIG10 is a BB cross-sectional view of the flow port in FIG6 ;

[0036] FIG11 is a schematic structural diagram of the calcium aluminate furnace described in Example 4.

[0037] In the figure: 1. First cooling box; 2. Support brick; 3. Lower pool wall; 4. Steel frame; 5. Bottom box; 6. Front box; 7. Lower pool wall of the flow port; 8. Flow port brick; 9. Flow channel; 10. Side box; 11. Connecting pipe; 12. Box; 13. Concrete; 14. Total circulation coolant pipeline; 15. Cooling liquid pipeline I; 16. Control valve I; 17. High-level overflow port I; 18. Pipeline I; 19. Total circulation return liquid pipeline; 20. Upper pool wall; 21. Step-type assembly surface; 22. Wall bricks on the left and right sides of the flow port; 23. Medium cooling device; 24. Circulation pump; 25. Cooling liquid pipeline II; 26. Control valve II; 27. High-level overflow port II; 28. Pipeline II. DETAILED DESCRIPTION

[0038] The embodiments of the present invention are further described below with reference to the accompanying drawings:

[0039] Example 1:

[0040] As shown in Figures 1 and 2, a calcium aluminate melting tank has a flow port at the front end of the melt tank body. A first cooling box 1 is installed around the periphery of the melt tank wall, except for the wall below the flow port. The height of the first cooling box 1 is no less than the flow channel height of the flow port. A medium cooling device is installed corresponding to the first cooling box 1. The cooling medium in the medium cooling device is transported to the first cooling box 1 via a main circulating coolant pipeline. The cooling medium flowing out of the first cooling box 1 is then transported back to the medium cooling device via a main circulating return liquid pipeline. In this embodiment, the medium cooling device adopts a conventional cooling tower.

[0041] In this embodiment, the first cooling box 1 is used to continuously cool the wall of the melting pool, thereby reducing the surface temperature of the calcium aluminate melt and, to a certain extent, reducing the reaction and erosion of the calcium aluminate melt on the refractory bricks at the liquid level of the melting pool wall (i.e., the contact point between the calcium aluminate melt and the air), thereby effectively protecting the liquid level of the melting pool wall. In addition, by cooling the wall of the melting pool, a layer of semi-solidified calcium aluminate can be formed on the surface of the calcium aluminate melt and the contact surface between the calcium aluminate melt and the wall of the melting pool, thereby achieving micro-flow, greatly reducing the scouring of the refractory bricks of the pool wall by the calcium aluminate melt, and effectively protecting the refractory bricks of the pool wall. The cooling medium is continuously circulated and cooled by the medium cooling device, thereby protecting the pool wall bricks.

[0042] In this embodiment:

[0043] The first cooling box 1 is arranged on the periphery of the melting pool wall, that is, the structures of the first cooling box 1 and the melting pool wall are independent of each other, so that when the melting pool wall is corroded, the pool wall bricks can be replaced more conveniently.

[0044] The melting pool wall in this embodiment adopts a split design, which includes an upper pool wall 20, a support brick 2 and a lower pool wall 3; the first cooling box 1 is a cooling box with a stepped cross-section, and its upper part near the melting pool is provided with a stepped assembly surface 21, which is flush with the upper end surface of the lower pool wall 3. Each support brick 2 is sandwiched between the lower pool wall 3 and the upper pool wall 20, with its inner end located on the upper end surface of the lower pool wall 3 and its outer end located on the stepped assembly surface 21; the height of the support brick 2 is not lower than the height of the flow channel 9 of the flow port. By adopting this split design and stepping (offsetting) the first cooling box, when the lower pool wall is eroded near the first cooling box 1, the support brick 2 will support the upper pool wall 20 upward, ensuring that the upper pool wall 20 is structurally stable and will not collapse into the kiln. Only the eroded refractory bricks of the lower pool wall 3 need to be replaced. The upper pool wall 20 and the lower pool wall 3 do not affect each other. From the perspective of long-term use, this design is more reasonable. Even if the refractory material of the lower pool wall 3 is completely eroded, the first cooling box 1 (as long as there is continuous cooling with a cooling medium) can still serve as the wall of the melting pool. This is because the calcium aluminate melt will form a solid protective film when it is cooled. Therefore, it will not affect normal production and will not cause catastrophic production accidents. In addition, the melting pool can continue to be used for 8 months, which is 16 times the service life of a traditional calcium aluminate melting pool.

[0045] If the melting pool wall does not adopt the above-mentioned split design, then during the calcium aluminate production process, when the lower part of the melting pool wall is eroded by the calcium aluminate melt to a position close to the first cooling box, the pool wall bricks above the erosion line will easily fall into the melting pool melt, that is, the upper pool wall of the melting pool will collapse, as shown in Figure 3. This will at least force the product production line to stop production. At worst, the upper part of the melting pool will burst into flames, and even the upper part of the first cooling box and the steel structure frame 4 will be burned, causing the high-temperature melt to flow from high altitude to the ground, causing devastating damage to the ground and the equipment on the ground, and may also endanger the lives of workshop personnel, which is a catastrophic accident.

[0046] In this embodiment, the first cooling box 1 is arranged close to the wall of the melting pool to improve the cooling efficiency.

[0047] In this embodiment, the first cooling box 1 is made of 310S stainless steel. To reduce investment costs, other steel materials or ordinary steel can also be used. The support bricks 2 are chrome corundum bricks.

[0048] Example 2:

[0049] As shown in Figures 1, 2, 4 and 5, a calcium aluminate melting pool includes all the structures described in Example 2, which will not be described again here.

[0050] Furthermore, the first cooling box 1 in this embodiment is composed of several independent boxes 12 arranged side by side horizontally. Each box 12 is arranged around the circumference of the melting pool wall, and the flow rate of the cooling medium flowing into each box 12 is independently controlled. There are gaps between adjacent boxes 12, into which high-temperature castable 13 is cast to form the integral structure. In this embodiment, the high-temperature castable is zirconium castable. In the first cooling box 1, each box 12 has an open top. A coolant pipeline 115 is provided on each box 12, extending from the top opening into the bottom of the box 12. Each coolant pipeline 115 is connected to the main circulating coolant pipeline 14, and a control valve 116 is installed on each coolant pipeline 115. A high-level overflow port 117 is provided on the side wall of each box 12, connecting the high-level overflow port 117 to the main circulating return liquid pipeline 19 via a pipeline 118. In this embodiment, a circulating pump 24 is installed on the main circulating coolant pipeline 14. This is shown in Figures 4 and 5.

[0051] The cooling medium is distributed from the main circulating coolant pipeline 14 to each coolant pipeline I15, which then flows into the bottom of the corresponding tank 12. The cooling medium flow rate in each tank 12 is individually controlled by a control valve I16. The low-temperature cooling medium enters the tank 12 from the bottom and flows upward, cooling the corresponding melt pool walls. The heated cooling medium overflows through the high-level overflow port I17 and is transported back to the medium cooling device 23 via pipeline I18 and the main circulating return liquid pipeline 19. The medium cooling device 23 cools the cooling medium and recycles it. The top of the tank 12 is open, so during use, each tank 12 is pressure-free and poses no danger.

[0052] In order to improve the structural stability of the first cooling box, in this embodiment, each box body 12 is fixedly connected to the steel frame 4.

[0053] Example 3:

[0054] As shown in Figures 1, 2, 4, 5, 6, 7, 8 and 9, a calcium aluminate melting pool includes all the structures described in Example 2, which will not be described again here.

[0055] In addition, the calcium aluminate melting pool described in this embodiment is provided with a second cooling box on the periphery of the flow port, and the second cooling box includes a front box body 6, two side boxes 10 and a bottom box body 5; the two side boxes 10 are arranged on both sides of the wall bricks 22 on the left and right sides of the flow port along the discharge direction, and the upper ends of the two side boxes 10 are open. A cooling liquid pipeline II25 is provided on the left side box body, and the cooling liquid pipeline II25 extends from the top opening into the bottom of the left side box body. The cooling liquid pipeline II25 is connected to the total circulation cooling liquid pipeline 14, and a control valve II26 is installed on the cooling liquid pipeline II25. A high-level overflow port II27 is provided on the side wall of the right side box body, and the high-level overflow port II27 is connected to the total circulation return liquid pipeline 19 through the pipeline II28; the front box body 6 is arranged directly in front of the lower pool wall 7 of the flow port, and it is connected to the two side boxes 10; the bottom box body 5 is arranged at the bottom of the melting pool position corresponding to the flow port, and it is communicated with the front box body 6. The upper portions of the two side boxes 10 are connected by connecting pipes 11 and are internally interconnected. The second cooling box is composed of the bottom box 5, the front box 6, and the two side boxes 10, forming a large cooling system that comprehensively cools the flow port and improves cooling efficiency. The arrow in Figure 6 indicates the outflow direction of the calcium aluminate melt at the flow port. When the calcium aluminate melt flows out of the flow port, the second cooling box will cool the flow port, reducing the reaction erosion and scouring of the calcium aluminate melt on the flow port, allowing the flow port brick 8 to be used for more than 8 months, significantly extending its service life.

[0056] The upper end of the middle box body 12 is in close contact with the flow port brick 8 and the wall bricks 22 on the left and right sides of the flow port, and the two side box bodies 10 are in close contact with the wall bricks 22 on the left and right sides of the flow port, thereby improving the cooling efficiency and enhancing the cooling effect.

[0057] In this embodiment, the cooling medium is water; the melting pool wall is built with 41# non-shrinkage fused zirconium corundum bricks; the flow port brick 8 is made of 300m thick chrome corundum bricks.

[0058] Example 4:

[0059] A calcium aluminate furnace having the calcium aluminate melting pool described in Example 3 is shown in Figures 1, 2, 4, 5, 6, 7, 8, 9, and 10. The specific structure of the calcium aluminate melting pool has been described in detail in Example 3 and will not be repeated here.

[0060] The above embodiments are all preferred embodiments of the present invention and cannot be considered to limit the scope of the embodiments of the present invention.

Claims

1. A calcium aluminate melting pool, wherein the front end of the melting pool body has a flow port, characterized in that: A first cooling box (1) is provided on the periphery of the melting pool wall at other locations except the pool wall (7) at the lower portion of the flow port; the height of the first cooling box (1) is not lower than the height of the flow channel (9) at the flow port; a medium cooling device is provided, the cooling medium in the medium cooling device is transported to the first cooling box (1) via a total circulation cooling liquid pipeline (14), and the cooling medium flowing out of the first cooling box (1) is transported back to the medium cooling device (23) via a total circulation return liquid pipeline (19).

2. The calcium aluminate melting pool according to claim 1, characterized in that: The melting pool wall adopts a split design, which includes an upper pool wall (20), a support plate brick (2) and a lower pool wall (3); the first cooling box (1) is a cooling box with a stepped cross-section, and a stepped assembly surface (21) is provided on the upper side of the cooling box close to the melting pool. The stepped assembly surface (21) is flush with the upper end surface of the lower pool wall (3). Each support plate brick (2) is sandwiched between the lower pool wall (3) and the upper pool wall (20), with its inner end located on the upper end surface of the lower pool wall (3) and its outer end located on the stepped assembly surface (21); the height of the support plate brick (2) is not lower than the height of the flow channel (9) of the flow port.

3. The calcium aluminate melting pool according to claim 2, characterized in that: The first cooling box (1) is composed of a plurality of independent boxes (12) arranged side by side in a horizontal manner. The boxes (12) are arranged around the wall of the melting pool. The flow rate of the cooling medium entering each box (12) is independently controlled. There is a gap between adjacent boxes (12), and high-temperature casting material (13) is cast in the gap to form an integral structure.

4. The calcium aluminate melting pool according to claim 3, characterized in that: Each box (12) is fixedly connected to the steel frame (4).

5. The calcium aluminate melting pool according to claim 3, characterized in that: The top of each box (12) is open, and a cooling liquid pipeline I (15) is provided on each box (12). The cooling liquid pipeline I (15) extends from the top opening into the bottom of the box (12). Each cooling liquid pipeline I (15) is connected to the total circulation cooling liquid pipeline (14). A control valve I (16) is installed on each cooling liquid pipeline I (15); a high-level overflow port I (17) is provided on the side wall of each box (12), and the high-level overflow port I (17) is connected to the total circulation return liquid pipeline (19) through a pipeline I (18).

6. The calcium aluminate melting pool according to claim 5, characterized in that: Each box (12) is fixedly connected to the steel frame (4).

7. The calcium aluminate melting pool according to any one of claims 1 to 6, characterized in that: A second cooling box is provided on the periphery of the flow port, and the second cooling box comprises a front box body (6) and two side box bodies (10); The two side boxes (10) are arranged on both sides of the wall bricks (22) on the left and right sides of the flow port along the discharge direction, and the upper ends of the two side boxes (10) are open; a cooling liquid pipeline II (25) is provided on at least one side box, and the cooling liquid pipeline II (25) extends from the top opening into the bottom of the side box, and the cooling liquid pipeline II (25) is connected to the total circulation cooling liquid pipeline (14), and a control valve II (26) is installed on the cooling liquid pipeline II (25); a high-level overflow port II (27) is provided on the side wall of at least the other side box, and the high-level overflow port II (27) is connected to the total circulation return liquid pipeline (19) through a pipeline II (28); The front box body (6) is arranged in front of the pool wall (7) at the lower part of the flow port and is communicated with the two side box bodies (10).

8. The calcium aluminate melting pool according to claim 7, characterized in that: The upper parts of the two side boxes (10) are connected through a connecting structure to form an integral structure.

9. The calcium aluminate melting pool according to claim 7, characterized in that: The second cooling box also includes a bottom box body (5), which is arranged at the bottom of the melting pool position corresponding to the flow port and is communicated with the front box body (6).

10. The calcium aluminate melting pool according to claim 8, characterized in that: The upper parts of the two side boxes (10) are connected through a connecting structure to form an integral structure.

11. The calcium aluminate melting pool according to claim 8 or 10, characterized in that: The connection structure adopts a connection pipe (11), and the two side boxes (10) are connected through the connection pipe (11).

12. A calcium aluminate furnace comprising the calcium aluminate melting bath according to any one of claims 1 to 11.

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