Vertical casting process and device for electric melting AZS shrinkage-cavity-free pool wall brick

Abstract

The invention belongs to the field of manufacturing of refractory materials for glass brick kilns, and particularly relates to a vertical casting process and device for an electric smelting AZS shrinkage-cavity-free pool wall brick. The vertical casting process for the electric smelting AZS shrinkage-cavity-free pool wall brick comprises the following steps that aluminum oxide, zircon sand, desilicated zirconium, sodium carbonate and AZS clinker are added into an electric furnace to be smelted into feed liquid; after melting is completed, the electric furnace is inclined, feed liquid flows into the feed liquid storage area from the hearth through the furnace nozzle flow guide area and then vertically flows into the quartz sand mold through the lower flow opening, and therefore vertical casting of the feed liquid is achieved. According to the vertical casting process for the electrically-fused AZS shrinkage-cavity-free pool wall brick, air holes in the surface of the AZS electrically-fused brick can be effectively reduced, the machining amount is reduced, the machining efficiency is improved, and the manufacturing cost is reduced; the invention also provides a device used by the method.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of manufacturing refractory materials for glass brick kiln, in particular to a vertical casting process and device for electrically fused AZS shrinkage-free pool wall brick. BACKGROUND

[0002] Electrically fused AZS brick is a key basic material for glass production core equipment-glass kiln, and the AZS shrinkage-free pool wall brick directly contacts with glass liquid. Because it is in a high temperature environment of 1600 DEG C for a long time and is continuously eroded by raw materials and glass liquid, the quality requirement is very strict. In addition to the requirement of internal organization being dense and uniform, the surface porosity and other appearance defects are also strictly controlled. The reason is that the position of the surface porosity of the pool wall brick will produce gas-liquid-solid three-phase interface erosion phenomenon, resulting in abnormal erosion at this position, affecting the service life of the glass kiln and the quality of the glass, and there is a safety risk.

[0003] The production process of electrically fused AZS brick is to add alumina, zircon sand, desilicon zircon, soda ash and other raw materials into an electric furnace for melting into a liquid, then pouring the liquid into a quartz sand mold after melting, then annealing and heat preservation, and finally processing into a specific shape for overall assembly, so as to be applied in glass kiln. The surface porosity of AZS shrinkage-free pool wall brick is produced in the process of pouring the liquid into the quartz sand mold. The well-melted liquid in the electric arc furnace is tilted forward through the electric arc furnace body, flows through the nozzle and then enters the sand mold. The position of the electric arc furnace is higher than that of the sand mold. When the electric furnace is tilted at a certain angle, the AZS liquid enters the sand mold with a certain arc, like pouring tea from a teapot into a teacup. In this process, the AZS liquid will have a long time of flushing on the surface of the sand mold. In the flushing process, the high-temperature coating and silicon sand particles on the surface of the sand mold will react with the liquid to produce gas. With the solidification of the liquid, the gas that cannot be discharged in time will form surface porosity on the surface of the brick. As a countermeasure for surface porosity, it is usually ground with larger size, but this brings increase in processing amount, reduction in processing efficiency and rise in manufacturing cost. Too much grinding amount will also grind off the dense layer on the surface of the AZS shrinkage-free pool wall brick, affecting the use effect of the product.

[0004] CN209868912U mentions a casting transfer device, which includes a casting transfer carrier, a first cavity is arranged in the casting transfer carrier, the first cavity is connected with a discharge port through a second cavity, the second cavity is arranged in the casting transfer carrier, and the discharge port penetrates through the casting transfer carrier. It can effectively reduce the gas holes remaining in the AZS electrically fused brick, improve the corrosion resistance of the electrically fused brick, effectively prolong the service life of the glass kiln, and ensure the safety of the kiln. However, this method sets a transfer carrier for each casting, which is relatively cumbersome to operate. Because of the existence of the cavity, a lot of liquid is wasted.

[0005] CN104926293A discloses a pouring cup for producing electrically fused zirconia corundum, a pouring cup with an upper open hollow structure, a cup body base provided with a lower outlet and a blind hole-shaped transfer bin, which is self-hardening formed by mixing silica sand, furan resin and curing agent, in use, the pouring cup is placed directly above the riser, the pouring liquid is poured into the transfer bin, and after being filled, it overflows and vertically enters the sand mold through the lower outlet, and after pouring, the pouring cup is directly filled with heat preservation material, and after cooling to below 60℃, it can be taken out. Vertical pouring is beneficial to exhaust, reduces air holes, avoids material liquid scattering and rolling, reduces crack rate to below 5%, eliminates scars, and eliminates the need for subsequent processing; simplifies the process, improves production efficiency; the product has good compactness, and the bulk density exceeds the industry standard, but it is well known in the industry that furan resin sand mold is difficult to withstand long-time erosion, and this type of riser is easily broken by high-temperature material liquid above 1800℃ during use, which causes the furan resin sand mold in the riser to enter the product, resulting in poor internal organization of the product. In addition, AZS material liquid has high viscosity and will adhere to the bottom surface of the furan resin sand mold pouring cup, and cannot completely realize vertical flow channel of the material liquid, that is, vertical pouring.

[0006] CN219797898U discloses an electric arc furnace spout for improving the appearance quality of electrically fused AZS, comprising: a discharge channel and a vertical discharge slot, the discharge channel is communicated with the electric arc furnace, the material liquid flowing out of the electric arc furnace flows out along the discharge channel, the vertical discharge slot is installed at the discharge end of the discharge channel and communicated with the discharge channel, and the vertical discharge slot remains in a substantially vertical state to make the material liquid in the discharge channel flow downward along the vertical direction when flowing out of the vertical discharge slot; by setting the vertical discharge slot, the material liquid can directly impact the bottom of the mold when flowing to the mold, without impacting the inner side plate of the mold, greatly reducing the occurrence rate of product surface interlayers, and rotating the vertical discharge slot arranged on the discharge channel, the electric arc furnace can also make the vertical discharge slot remain in a vertical state when tilting at a certain angle, and the un-melted material slag in the material liquid is blocked by the baffle, improving the finished product effect of the product. However, because the vertical discharge slot and the discharge channel are in a vertical relationship, when the electric arc furnace is tilted, the vertical discharge slot will be tilted, and the material liquid will flow in a direction perpendicular to the tilt angle, so it cannot guarantee that the material liquid flows vertically during pouring, thereby realizing vertical pouring. In addition, the structure has cooling water, and once water leakage occurs, explosion is easy to occur, which has a great risk of safe production.

[0007] In summary, the current pouring technology mainly focuses on the optimization of the pouring mold, and cannot realize true vertical pouring, cannot avoid the erosion of the material liquid to the sand mold, and cannot fundamentally solve the surface air hole problem in the pouring process of electrically fused AZS bricks. SUMMARY

[0008] In order to overcome the defects of the prior art, the vertical casting process for electrically fused AZS non-shrinkage pool wall brick is provided, which can effectively reduce the surface pores of the AZS electrically fused brick, reduce the processing amount, improve the processing efficiency, and reduce the manufacturing cost.

[0009] The vertical casting process for electrically fused AZS non-shrinkage pool wall brick of the application comprises the following steps: (1) Alumina, zircon sand, desiliconized zircon, soda ash and AZS clinker are added to an electric furnace to melt into a liquid; (2) After the raw materials are melted, the electric furnace is tilted, the liquid flows out from the hearth through the vertical casting device, the vertical falling of the high-temperature liquid is realized through the vertical casting device, and the quartz sand mold is filled until it is full; after the casting is completed, it is placed in a heat preservation box for natural cooling and annealing until the temperature of the AZS non-shrinkage pool wall brick is lower than 60℃, and then it is taken out, so that the electrically fused AZS non-shrinkage pool wall brick is obtained.

[0010] In the step (2), the operation parameters during the casting process are as follows: the inclination angle of the electric furnace is 10°-20°, and the temperature of the liquid flowing out of the nozzle is 1750℃-1850℃; wherein, the inclination angle of the electric furnace and the flow rate are controlled by an angle disc suspended on the electric furnace, and the temperature of the liquid flowing out is measured and controlled by an infrared thermometer; during the casting process, a casting trolley with up-down lifting and front-back moving functions is used to adjust the corresponding relationship between the nozzle and the sand mold, so that the liquid flows down along the middle of the sand mold.

[0011] The device used in the vertical casting process for electrically fused AZS non-shrinkage pool wall brick comprises an electric furnace and a nozzle connected thereto, the nozzle is provided with a flow guide area, a liquid storage area and an external support structure, the flow guide area is connected to the side wall of the electric furnace near the electric furnace, and the liquid storage area is located at the front end of the flow guide area; the liquid storage area comprises an arc-shaped groove with an upward opening and an upwardly inclined end face and a cylindrical block structure, and the bottom of the cylindrical block structure is provided with a downflow port; the external support structure is located outside the flow guide area and the liquid storage area.

[0012] Preferably, the flow guide area is an arc-shaped groove with an upward opening, the length of the flow guide area is 600-800mm, and the radius of the internal groove is 65-75mm.

[0013] Preferably, the vertical height difference between the highest point of the liquid storage area and the upper plane of the flow guide area is 150-200mm.

[0014] Preferably, the cylindrical block structure is a hollow structure, the opening diameter of the upper end is 180-220mm, and the diameter of the downflow port of the lower end is 100-140mm.

[0015] Preferably, the included angle between the lower edge of the cylindrical block structure and the bottom surface of the flow guide area is 13-17°.

[0016] Preferably, the overall length of the material liquid storage area is 700-900mm.

[0017] Preferably, the external support structure is composed of support blocks directly connected with the electric furnace wall and support plates closely attached to the outside of the flow guide area and the material liquid storage area, which plays a supporting and fixing role.

[0018] Preferably, the material of the flow guide area and the material liquid storage area is black lead material, and the material of the external support structure is heat-resistant steel.

[0019] After the raw material is melted, the electric furnace is tilted by a certain angle through a mechanical device, and the material liquid flows from the inside of the electric furnace into the flow guide area, then into the material liquid storage area, and finally flows out through the downflow port of the hollow cylindrical block structure. As the electric furnace is tilted, the furnace nozzle is also tilted. Since there is a certain angle between the hollow cylindrical block structure vertically pouring the material liquid storage area and the flow guide area, the hollow cylindrical block structure is perpendicular to the bottom surface when the electric furnace is tilted. Therefore, the material liquid in the electric furnace can be poured vertically into the sand mold, so that the material liquid does not wash the sand mold, and the generation of surface pores of the electric melting AZS non-shrinkage pool wall brick is fundamentally avoided.

[0020] Compared with the prior art, the beneficial effects of the present application are: (1) The vertical pouring process for electric melting AZS non-shrinkage pool wall brick of the present application adopts a vertical pouring method to control the flow rate of the material liquid and the angle of entering the quartz sand mold, which reduces the proportion of surface pores of the electric melting AZS non-shrinkage pool wall brick, and the product has no dense pore area. Compared with the traditional pouring method, there is no splashing of material liquid during the pouring process, the casting time is shortened, and the product organization density is effectively improved by adopting vertical pouring, and the G2 and above ratio reaches 80%.

[0021] (2) The device used in the vertical pouring process for electric melting AZS non-shrinkage pool wall brick of the present application has a simple structure. By designing the flow guide area and the material liquid storage area of the furnace nozzle, it is ensured that no air is sucked into the vertically flowing material liquid. At the same time, the material liquid is prevented from washing the quartz sand mold when it is poured obliquely, and the splashing of the material liquid caused by washing is also avoided, thereby effectively improving the quality of the product. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The structure diagram of the device used in the vertical pouring process for electric melting AZS non-shrinkage pool wall brick of the present application; Figure 2 The structure diagram of the furnace nozzle of the present application; Figure 3 The top view of the furnace nozzle of the present application; Figure 4 The structure diagram of the downflow port of the present application; Figure 5 This is a schematic diagram of the traditional casting method.

[0023] In the diagram: 1. Electric furnace; 2. Furnace nozzle; 3. Guide zone; 4. Liquid storage zone; 5. Downflow outlet; 6. External support structure. Detailed Implementation

[0024] The technical solution of the present invention will be further described in detail below with reference to embodiments and comparative examples.

[0025] The products cast in the examples and comparative examples are described as follows: 37.7 wt.% alumina, 25 wt.% zircon sand (zirconia content ≥ 66.0 wt.%), 6 wt.% desilicationized zircon (zirconia content ≥ 98.0 wt.%), 30 wt.% AZS clinker (zirconia content ≥ 32.5 wt.%), and 1.3 wt.% soda ash were added by weight and mixed in electric furnace 1 for melting. The products were then cast according to the parameters in the examples and comparative examples. The cast samples were 250 mm * 400 mm * 1325 mm 33# electrofused AZS non-shrinkage-cavity pool wall bricks.

[0026] like Figures 1-4 As shown in the embodiments and comparative examples, the apparatus used in the vertical casting process for electrofused AZS shrinkage-free pool wall bricks includes an electric furnace 1 and a furnace nozzle 2 connected thereto. The furnace nozzle 2 is provided with a guide zone 3, a liquid material storage zone 4, and an external support structure 6. The guide zone 3 is an arc-shaped groove with an upward opening, located near the side of the electric furnace 1 and connected to the side wall of the electric furnace 1. The liquid material storage zone 4 is located at the front end of the guide zone 3. The liquid material storage zone 4 includes an arc-shaped groove with an upward structure and a hollow cylindrical block structure with an inclined end face. The bottom of the cylindrical block structure is provided with a flow outlet 5. The external support structure 6 is located outside the guide zone 3 and the liquid material storage zone 4, and is directly connected to the wall of the electric furnace 1. The system consists of a support block and a support plate that is closely attached to the outside of the flow guide zone 3 and the liquid storage zone 4. The flow guide zone 3 is 600-800mm long and has an internal groove radius of 65-75mm. The vertical height difference between the highest point of the liquid storage zone 4 and the upper plane of the flow guide zone 3 is 150-200mm. The diameter of the upper opening of the cylindrical block structure is 180-220mm, and the diameter of the lower outlet 5 is 100-140mm. The angle between the lower edge of the cylindrical block structure and the bottom surface of the flow guide zone 3 is 13-17°. The overall length of the liquid storage zone 4 is 700-900mm. Both the flow guide zone 3 and the liquid storage zone 4 are made of black lead, and the external support structure 6 is made of heat-resistant steel.

[0027] Example 1 The vertical casting process for the electrofused AZS shrinkage-free pool wall bricks includes the following steps: (1) By mass percentage, add 37.7 wt.% alumina, 25 wt.% zircon sand (zirconia content ≥ 66.0 wt.%), 6 wt.% desilication zircon (zirconia content ≥ 98.0 wt.%), 30 wt.% AZS clinker (zirconia content ≥ 32.5 wt.%), and 1.3 wt.% soda ash, mix them, and put them into electric furnace 1 to melt into a liquid material; (2) After the raw material is melted, the electric furnace 1 is tilted 10° so that the 1750°C liquid material flows out from the furnace nozzle 2, so that the high temperature liquid material falls vertically until it fills the entire quartz sand mold. After casting, it is placed in the heat preservation box for natural cooling and annealing until the temperature of the AZS shrinkage-free pool wall brick is lower than 60°C and then it is taken out to obtain the electrofused AZS shrinkage-free pool wall brick.

[0028] Both the flow guide zone 3 and the liquid storage zone 4 are made of black lead. The external support structure 6 is made of heat-resistant steel. The flow guide zone 3 is 600mm long and has an internal groove radius of 65mm. The vertical height difference between the highest point of the liquid storage zone 4 and the upper plane of the flow guide zone 3 is 150mm. The diameter of the upper opening of the cylindrical block structure is 180mm, and the diameter of the lower outlet 5 is 100mm. The angle between the lower edge of the cylindrical block structure and the bottom surface of the flow guide zone 3 is 13°. The overall length of the liquid storage zone 4 is 700mm.

[0029] Example 2 The vertical casting process for the electrofused AZS shrinkage-free pool wall bricks includes the following steps: (1) By mass percentage, add 37.7 wt.% alumina, 25 wt.% zircon sand (zirconia content ≥ 66.0 wt.%), 6 wt.% desilication zircon (zirconia content ≥ 98.0 wt.%), 30 wt.% AZS clinker (zirconia content ≥ 32.5 wt.%), and 1.3 wt.% soda ash, mix them, and put them into electric furnace 1 to melt into a liquid material; (2) After the raw material is melted, the electric furnace 1 is tilted at 15° so that the 1800°C liquid material flows out from the furnace nozzle 2, so that the high temperature liquid material falls vertically until it fills the entire quartz sand mold. After casting, it is placed in a heat preservation box for natural cooling and annealing until the temperature of the AZS shrinkage-free pool wall brick is lower than 60°C, and then it is taken out to obtain the electrofused AZS shrinkage-free pool wall brick.

[0030] The guide zone 3 and the liquid storage zone 4 are both made of black lead. The external support structure 6 is made of heat-resistant steel. The guide zone 3 is 700mm long and has an internal groove radius of 70mm. The vertical height difference between the highest point of the liquid storage zone 4 and the upper plane of the guide zone 3 is 180mm. The diameter of the upper opening of the cylindrical block structure is 200mm, and the diameter of the lower outlet 5 is 120mm. The angle between the lower edge of the cylindrical block structure and the bottom surface of the guide zone 3 is 15°. The overall length of the liquid storage zone 4 is 800mm.

[0031] Example 3 The vertical casting process for the electrofused AZS shrinkage-free pool wall bricks includes the following steps: (1) By mass percentage, add 37.7 wt.% alumina, 25 wt.% zircon sand (zirconia content ≥ 66.0 wt.%), 6 wt.% desilication zircon (zirconia content ≥ 98.0 wt.%), 30 wt.% AZS clinker (zirconia content ≥ 32.5 wt.%), and 1.3 wt.% soda ash, mix them, and put them into electric furnace 1 to melt into a liquid material; (2) After the raw material is melted, the electric furnace 1 is tilted 20° so that the 1850° hot liquid flows out from the furnace nozzle 2, so that the high temperature liquid falls vertically until it fills the entire quartz sand mold. After casting, it is placed in a heat preservation box for natural cooling and annealing until the temperature of the AZS shrinkage-free pool wall brick is lower than 60°C and then it is taken out to obtain the electrofused AZS shrinkage-free pool wall brick.

[0032] Both the flow guide zone 3 and the liquid storage zone 4 are made of black lead. The external support structure 6 is made of heat-resistant steel. The flow guide zone 3 is 800mm long and has an internal groove radius of 75mm. The vertical height difference between the highest point of the liquid storage zone 4 and the upper plane of the flow guide zone 3 is 200mm. The diameter of the upper opening of the cylindrical block structure is 220mm, and the diameter of the lower outlet 5 is 140mm. The angle between the lower edge of the cylindrical block structure and the bottom surface of the flow guide zone 3 is 17°. The overall length of the liquid storage zone 4 is 900mm.

[0033] Comparative Example 1 Comparative Example 1 is the same as Example 1, except that the parameters of the device used are different. The guide zone 3 and the liquid storage zone 4 of the nozzle 2 in the comparative example are both made of black lead, the external support structure 6 is made of heat-resistant steel, the length of the guide zone 3 is 500mm, the radius of the internal groove is 65mm, the vertical height difference between the highest point of the liquid storage zone 4 and the upper plane of the guide zone 3 is 120mm, the diameter of the upper opening of the cylindrical block structure is 150mm, the diameter of the lower outlet 5 is 80mm, the angle between the lower edge of the cylindrical block structure and the bottom surface of the guide zone 3 is 13°, and the overall length of the liquid storage zone 4 is 600mm.

[0034] Comparative Example 2 The vertical casting process for the electrofused AZS shrinkage-free pool wall bricks includes the following steps: (1) By mass percentage, add 37.7 wt.% alumina, 25 wt.% zircon sand (zirconia content ≥ 66.0 wt.%), 6 wt.% desilication zircon (zirconia content ≥ 98.0 wt.%), 30 wt.% AZS clinker (zirconia content ≥ 32.5 wt.%), and 1.3 wt.% soda ash, mix them, and put them into electric furnace 1 to melt into a liquid material; (2) After the raw material is melted, the electric furnace 1 is tilted at 25° so that the 1800°C liquid material flows out from the furnace nozzle 2, so that the high temperature liquid material falls vertically until it fills the entire quartz sand mold. After casting, it is placed in a heat preservation box for natural cooling and annealing until the temperature of the AZS shrinkage-free pool wall brick is lower than 60°C, and then it is taken out to obtain the electrofused AZS shrinkage-free pool wall brick.

[0035] Both the flow guide zone 3 and the liquid storage zone 4 are made of black lead. The external support structure 6 is made of heat-resistant steel. The flow guide zone 3 is 700mm long and has an internal groove radius of 70mm. The vertical height difference between the highest point of the liquid storage zone 4 and the upper plane of the flow guide zone 3 is 180mm. The diameter of the upper opening of the cylindrical block structure is 200mm, and the diameter of the lower outlet 5 is 120mm. The angle between the lower edge of the cylindrical block structure and the bottom surface of the flow guide zone 3 is 17°. The overall length of the liquid storage zone 4 is 800mm.

[0036] Comparative Example 3 use Figure 5 In the traditional casting method, the guide zone 3 is 1500mm long. After melting, casting is carried out. The electric furnace 1 is tilted at an angle of 25° and the casting temperature is 1820℃.

[0037] The 250mm*400mm*1325mm 33# electrofused AZS non-shrinkage-hole pool wall bricks prepared in the examples and comparative examples were processed. One side of the 400mm*1325mm brick was fully ground to remove the surface silica sand. The surface porosity and appearance were measured, and non-destructive testing was performed on the internal structure to confirm the internal density. The surface porosity and the proportion of surface pores with a diameter ≥3mm to the total area of ​​400mm*1325mm were statistically analyzed to determine the improvement effect on surface porosity. The results are shown in Table 1. The detection process for the surface porosity and the proportion of surface pores with a diameter ≥3mm to the total area of ​​400mm*1325mm was as follows: the ground surface was visually observed, and the pore diameter was confirmed using a 3mm diameter probe. Then, the area with pores was divided into rectangles, and the length and width of the surface pore area were measured to calculate the area. The sum of the areas of each area was then divided by the total area to obtain the proportion.

[0038] Table 1. Statistical table of surface pore ratio, surface pores with diameter ≥3mm, and areas with or without dense surface pores.

[0039] As shown in Table 1, after changing the casting method, the proportion of surface porosity caused by the molten material scouring was significantly reduced to less than 10% of the original proportion, and there were no surface porosity larger than 3 mm in diameter. The surface porosity was significantly improved.

[0040] The flow of molten material and casting time of electrofused AZS non-shrinkage tank wall bricks in the examples and comparative examples were statistically analyzed. The molten material volume of AZS tank wall bricks with a diameter of 250mm*400mm*1325mm was 1034kg. The casting time was calculated using a stopwatch. The statistical results are shown in Table 2.

[0041] Table 2. Statistics on molten material flow and casting time during the casting process.

[0042] The casting speeds of the examples and comparative examples calculated from Table 2 were 35 kg / s, 37 kg / s, 40 kg / s, 30 kg / s, 42 kg / s, and 32 kg / s, respectively. No overflow of molten material was found in examples 1-3, and no air was entangled when the molten material flowed into the sand mold. The molten material did not directly erode the sand mold. At the beginning of casting in comparative examples 2 and 3, molten material overflowed from the edge of the furnace nozzle, and air was entangled when the molten material flowed into the sand mold in both comparative examples 2-3.

[0043] In Comparative Example 1, the liquid material intermittently stopped at the outlet; in Comparative Example 2, there was a noticeable gap in the middle of the liquid material at the outlet; in Comparative Example 3, the liquid material overturned and entrained air after impacting the quartz sand mold during its descent.

[0044] Non-destructive internal testing was performed on the electrofused AZS shrinkage-free pool wall bricks cast in the examples and comparative examples, respectively. The Japanese-imported MJ200 flaw detector was used. According to the degree of internal density, they were divided into G1, G2, G3 and NG, where NG was unqualified. The internal density of G1 to G3 decreased sequentially. The number and proportion of products above G1 and G2 were counted. The results are shown in Table 3.

[0045] Table 3. Statistics on Internal Density

[0046] As can be seen from Table 3, the proportion of G2 and above structures in Comparative Examples 1-3 is no higher than 60%. In Comparative Example 3, one case of non-compliance occurred when casting using the conventional method. In Examples 1-3, the proportion of G2 and above reached more than 80%, which significantly improved the internal structure of the product. The reason is that the solidification of AZS pool wall bricks follows the law from bottom to top and from surface to inside. Vertical casting is more in line with the solidification law of the product itself and can eliminate internal shrinkage porosity and shrinkage pore structure to a certain extent. Therefore, the internal density is greatly improved.

Claims

1. A vertical casting process for electrically fused AZS non-piping pool wall brick, characterized by, It comprises the following steps: (1) adding alumina, zircon sand, desiliconized zircon, soda ash and AZS clinker into an electric furnace to melt into a liquid; (2) after the raw materials are melted, the electric furnace is tilted by 10-20°, so that the liquid flows out of the nozzle to realize vertical falling until the quartz sand mold is filled; after casting, it is placed in a heat preservation box for natural cooling and annealing until the temperature of the AZS shrinkage-free pool wall brick is below 60℃, and then it is taken out, thereby obtaining the electric melting AZS shrinkage-free pool wall brick.

2. The vertical casting process for electrically fused AZS non-piping pool wall brick according to claim 1, characterized in that, In step (2), the temperature of the liquid flowing out of the nozzle is 1750-1850℃.

3. Apparatus for use in a vertical casting process for the production of non- porosity pool wall bricks of electrically fused AZS according to any one of claims 1-2, characterized in that, It comprises an electric furnace (1) and a nozzle (2) connected thereto, the nozzle (2) being provided with a flow guide area (3), a liquid storage area (4) and an external support structure (6), the flow guide area (3) being connected to the side wall of the electric furnace (1) near the electric furnace (1), and the liquid storage area (4) being located at the front end of the flow guide area (3); the liquid storage area (4) comprises an arc-shaped groove with an upward structure and a cylindrical block structure with an inclined end face, and the bottom of the cylindrical block structure is provided with a downflow port (5); the external support structure (6) is located outside the flow guide area (3) and the liquid storage area (4).

4. The apparatus for use in a vertical casting process for the production of electrically fused AZS non-piping pool wall bricks according to claim 3, characterized in that The flow guide area (3) is an arc-shaped groove with an opening upward, the length of the flow guide area (3) is 600-800mm, and the radius of the inner groove is 65-75mm.

5. The apparatus for use in a vertical casting process for the production of electrically fused AZS non-piping pool wall bricks according to claim 3, characterized in that The vertical height difference between the highest point of the liquid storage area (4) and the upper plane of the flow guide area (3) is 150-200mm.

6. The apparatus for use in a vertical casting process for the production of electrically fused AZS non-piping pool wall bricks according to claim 3, characterized in that The cylindrical block structure is a hollow structure, the opening diameter at the upper end is 180-220mm, and the diameter of the downflow port (5) at the lower end is 100-140mm.

7. The apparatus for use in a vertical casting process for the production of electrically fused AZS non-piping pool wall bricks according to claim 5, characterized in that The included angle between the lower edge of the cylindrical block structure and the bottom surface of the flow guide area (3) is 13-17°.

8. The apparatus for use in a vertical casting process for the production of electrically fused AZS non-piping pool wall bricks according to claim 3, characterized in that The overall length of the liquid storage area (4) is 700-900mm.

9. The apparatus for use in a vertical casting process for the production of electrically fused AZS non-piping pool wall bricks according to claim 3, characterized in that The external support structure (6) is composed of a support block directly connected to the wall of the electric furnace (1) and a support plate closely attached to the outside of the flow guide area (3) and the liquid storage area (4).

10. The apparatus for use in a vertical casting process for the production of electrically fused AZS non-piping pool wall bricks according to claim 3, characterized in that The materials of the flow guide area (3) and the liquid storage area (4) are black lead, and the material of the external support structure (6) is heat-resistant steel.

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