1. A preparation method of a composite sand mold for casting an electric smelting AZS pool wall brick is characterized by comprising the following steps: the method comprises the following steps: the preparation of the brick body sand mold comprises the steps of fully mixing quartz sand and furan resin to prepare the brick body sand mold (1), standing at room temperature for 72 hours, wherein the granularity of the quartz sand is 40-70 meshes, and the addition proportion of the furan resin is 0.5-2.0% of that of the quartz sand; step two, manufacturing a riser sand mold, namely mixing quartz sand and water glass according to a certain proportion to prepare a riser sand mold (2), and then baking the riser sand mold for 1.5 to 3 hours at the temperature of between 100 and 120 ℃, wherein the granularity of the quartz sand is 40 to 70 meshes, and the adding proportion of the water glass is 3.0 to 5.0 percent of the quartz sand; step three, assembling a brick body sand mold and a riser sand mold; putting the brick body sand mold (1) into a mold (3), then putting the riser sand mold (2) on the brick body sand mold (1), and then filling a heat-insulating medium layer (5) between the outer walls of the brick body sand mold (1) and the riser sand mold (2) and the inner wall of the mold (3); step four, molding the pool wall brick casting mold, namely spraying zirconium coating layers (4) on the inner walls of the brick body sand mold (1) and the riser sand mold (2), and forming the pool wall brick casting mold after the zirconium coating layers (4) are self-hardened; and step five, casting the pool wall brick, namely injecting the casting liquid into the pool wall brick casting mould, and cooling the casting liquid to form the pool wall brick.

2. The method for preparing the composite sand mold for casting the fused AZS pool wall brick according to claim 1, which is characterized by comprising the following steps of: the brick sand mold (1) is of a barrel-shaped structure with a sealed bottom and an open top.

3. The method for preparing the composite sand mold for casting the fused AZS pool wall brick according to claim 1, which is characterized by comprising the following steps of: the riser sand mold (2) comprises a straight cylinder section (a) and an integrally formed closing section (b).

4. The method for preparing the composite sand mold for casting the fused AZS pool wall brick according to claim 1, which is characterized by comprising the following steps of: the heat-insulating medium layer (5) is quartz sand with the granularity of 3mm-5 mm.

5. The method for preparing the composite sand mold for casting the fused AZS pool wall brick according to claim 1, which is characterized by comprising the following steps of: the component of the zirconium coating layer (4) is alcohol-based zircon, and the spraying thickness of the zirconium coating layer is 0.1-0.5 mm.

6. The method for preparing the composite sand mold for casting the fused AZS pool wall brick according to claim 1, which is characterized by comprising the following steps of: the casting liquid comprises the following components: ZrO (ZrO)₂: 32 %~44 %，Al₂O₃: 50%-40%，SiO₂:15.5~12.5 %，Na₂O: 1.5~1.25%。

7. The method for preparing the composite sand mold for casting the fused AZS pool wall brick according to claim 1, which is characterized by comprising the following steps of: in the fifth step, when the casting liquid is injected into the pool wall brick casting mold, the liquid contacts the inner wall of the riser sand mold, and flows into the bottom of the brick sand mold (1) under the flow guidance of the inner wall of the riser sand mold (2).

Background art:

the fused AZS pool wall brick is the core of the refractory material of the whole glass kiln, the brick material is directly contacted with molten glass, the quality of the molten glass erosion resistance directly determines the service life of the kiln, and according to statistics, in the event of shutdown maintenance of the refractory material of the glass kiln at home and abroad, eighty percent of the refractory material is caused by the expiration of the service life of the pool wall brick, and even more, other parts of the kiln are intact and have no common meaning, and the pool wall brick reaches the service life, so that huge material waste and economic loss of a kiln enterprise are caused.

The resin sand mold has the characteristics of good high-temperature collapsibility, and the product cast by the resin sand mold has few surface cracks and regular size. However, the resin sand mold has poor high-temperature liquid scouring resistance, and can not be used as a casting riser of the pool wall brick to bear large high-temperature liquid scouring.

The invention content is as follows:

the invention provides a preparation method of a composite sand mold for casting an electric melting AZS pool wall brick, aiming at overcoming the defects in the prior art.

The application provides the following technical scheme:

a preparation method of a composite sand mold for casting an electric smelting AZS pool wall brick is characterized by comprising the following steps: the method comprises the following steps: the preparation of a brick body sand mold comprises the steps of fully mixing quartz sand and furan resin to prepare the brick body sand mold, standing for 72 hours at room temperature, wherein the granularity of the quartz sand is 40-70 meshes, and the addition proportion of the furan resin is 0.5-2.0% of that of the quartz sand; step two, manufacturing a riser sand mold, mixing quartz sand and water glass according to a certain proportion to prepare the riser sand mold, and then baking the riser sand mold for 1.5 to 3 hours at the temperature of 100 to 120 ℃, wherein the granularity of the quartz sand is 40 to 70 meshes, and the adding proportion of the water glass is 3.0 to 5.0 percent of that of the quartz sand; step three, assembling a brick body sand mold and a riser sand mold; placing a brick body sand mold into a mold, then placing a riser sand mold on the brick body sand mold, and then filling heat-insulating medium layers between the outer walls of the brick body sand mold and the riser sand mold and the inner wall of the mold; and step four, setting a zirconium coating, and spraying zirconium coating layers on the inner walls of the brick sand mold and the riser sand mold.

On the basis of the technical scheme, the following further technical scheme can be provided:

the brick sand mold is of a barrel-shaped structure with a sealed bottom and an open top.

The riser sand mold comprises a straight cylinder section and an integrally formed closing section.

The heat-insulating medium layer is quartz sand with the granularity of 3mm-5 mm.

The component of the zirconium coating layer is alcohol-based zircon, and the spraying thickness of the zirconium coating layer is 0.1-0.5 mm.

The casting material liquid comprises the following components: ZrO (ZrO)₂: 32 %~44 %，Al₂O₃: 50%-40%，SiO₂:15.5~12.5 %，Na₂O: 1.5~1.25%。

In the fifth step, when the casting liquid is injected into the pool wall brick casting mold, the liquid contacts the inner wall of the riser sand mold, and flows into the bottom of the brick sand mold under the flow guidance of the inner wall of the riser sand mold.

The invention has the advantages that:

the preparation method provided by the invention has the advantages of simple steps and convenience in operation, and the production cost of the sand mold is reduced by adopting the sand mold with a composite structure. Particularly, the traditional sand mold manufacturing idea is changed, and a combined type double-body structure combining a riser sand mold and a brick sand mold is adopted, so that the problem that the service life of the sand mold with a single structure in the prior art is short is solved.

Description of the drawings:

fig. 1 is a schematic structural diagram of a composite sand mold for casting provided by the invention.

The specific implementation mode is as follows:

the composite sand molds formed in the following embodiments have the same structure, and therefore, they will be described herein with reference to fig. 1.

Example 1:

a preparation method of a composite sand mold for casting an electric smelting AZS pool wall brick is characterized by comprising the following steps: the method comprises the following steps: and (3) manufacturing the brick sand mold, fully mixing quartz sand with furan resin, wherein the granularity of the quartz sand is 40 meshes, the adding proportion of the furan resin is 1.5 percent of the quartz sand, pressing the mixture into the brick sand mold 1 with a barrel-shaped structure with the lower end sealed and the upper end opened, and standing the brick sand mold 1 at room temperature for 72 hours.

Step two: the riser sand mold is manufactured by mixing quartz sand and water glass according to a certain proportion and pressing the mixture into the riser sand mold 2, wherein the granularity of the quartz sand is 45 meshes, and the adding proportion of the water glass is 3.5 percent of the quartz sand. The riser sand mold 2 comprises a straight cylinder section a with the diameter larger than that of the brick sand mold 1, the lower end of the straight cylinder section a is communicated with an integrally formed closing-in section b, the diameter of the closing-in section b is reduced to be funnel-shaped, and the diameter of the lower end of the closing-in section b is the same as that of the brick sand mold 1. Then the riser sand mold 2 is placed in an environment with the temperature of 110 ℃ to be baked for 2 hours for shaping, and then is taken out for standby.

Step three, assembling a brick body sand mold and a riser sand mold; the brick body sand mold 1 is placed into the mold 3, then the riser sand mold 2 is placed at the opening end of the upper portion of the brick body sand mold 1, so that the brick body sand mold and the riser sand mold are coaxially distributed, and then a heat insulation medium layer 5 is filled between the outer walls of the brick body sand mold 1 and the riser sand mold 2 and the inner wall of the mold 3. The heat-insulating medium layer 5 is quartz sand with the granularity of 4 mm.

And step four, molding the pool wall brick casting mold, wherein zirconium coating layers 4 are sprayed on the inner walls of the brick body sand mold 1 and the riser sand mold 2, the main components of the zirconium coating layers 4 are alcohol-based zircon, and the spraying thickness is 0.4 mm.

Step five, casting pool wall bricks, wherein the components are as follows: ZrO (ZrO)₂: 32 %~44 %，Al₂O₃: 50%-40%，SiO₂:15.5~12.5 %，Na₂And (3) injecting a casting feed liquid with the O ratio of 1.5-1.25% into the pool wall brick casting mold, wherein the casting feed liquid firstly contacts the inner wall of the dead head sand mold when being injected into the pool wall brick casting mold, and then flows into the bottom of the brick body sand mold 1 under the flow guidance of the rear closing section b, so that the direct impact of the casting feed liquid to be cast on the bottom of the brick body sand mold 1 is reduced, the casting feed liquid is not injected after the casting feed liquid rises to a proper height in the brick body sand mold 1, and the pool wall brick can be obtained after the casting feed liquid is naturally cooled and solidified.

Example 2:

a preparation method of a composite sand mold for casting an electric smelting AZS pool wall brick is characterized by comprising the following steps: the method comprises the following steps: and (3) manufacturing the brick sand mold, fully mixing quartz sand with furan resin, pressing the quartz sand with the granularity of 60 meshes and the furan resin with the addition proportion of 1 percent of the quartz sand into the brick sand mold 1 with a barrel-shaped structure with the lower end sealed and the upper end opened, and standing the brick sand mold 1 at room temperature for 72 hours.

Step two: the riser sand mold is manufactured by mixing quartz sand and water glass according to a certain proportion and pressing the mixture into the riser sand mold 2, wherein the granularity of the quartz sand is 70 meshes, and the adding proportion of the water glass is 4 percent of that of the quartz sand. The riser sand mold 2 comprises a straight cylinder section a with the diameter larger than that of the brick sand mold 1, the lower end of the straight cylinder section a is communicated with an integrally formed closing-in section b, the diameter of the closing-in section b is reduced to be funnel-shaped, and the diameter of the lower end of the closing-in section b is the same as that of the brick sand mold 1. Then the riser sand mold 2 is placed in an environment with the temperature of 100 ℃ to be baked for 3 hours for shaping, and then is taken out for standby.

Step three, assembling a brick body sand mold and a riser sand mold; the brick body sand mold 1 is placed into the mold 3, then the riser sand mold 2 is placed at the opening end of the upper portion of the brick body sand mold 1, so that the brick body sand mold and the riser sand mold are coaxially distributed, and then a heat insulation medium layer 5 is filled between the outer walls of the brick body sand mold 1 and the riser sand mold 2 and the inner wall of the mold 3. The heat-insulating medium layer 5 is quartz sand with the granularity of 3 mm.

And step four, molding the pool wall brick casting mold, wherein zirconium coating layers 4 are sprayed on the inner walls of the brick body sand mold 1 and the riser sand mold 2, the main components of the zirconium coating layers 4 are alcohol-based zircon, and the spraying thickness is 0.3 mm.

Step five, casting pool wall bricks, wherein the components are as follows: ZrO (ZrO)₂: 32 %~44 %，Al₂O₃: 50%-40%，SiO₂:15.5~12.5 %，Na₂And (3) injecting a casting feed liquid with the O ratio of 1.5-1.25% into the pool wall brick casting mold, wherein the casting feed liquid firstly contacts the inner wall of the dead head sand mold when being injected into the pool wall brick casting mold, and then flows into the bottom of the brick body sand mold 1 under the flow guidance of the rear closing section b, so that the direct impact of the casting feed liquid to be cast on the bottom of the brick body sand mold 1 is reduced, the casting feed liquid is not injected after the casting feed liquid rises to a proper height in the brick body sand mold 1, and the pool wall brick can be obtained after the casting feed liquid is naturally cooled and solidified.

Example 3:

a preparation method of a composite sand mold for casting an electric smelting AZS pool wall brick is characterized by comprising the following steps: the method comprises the following steps: and (3) manufacturing the brick sand mold, fully mixing quartz sand with furan resin, pressing the quartz sand with the granularity of 70 meshes and the furan resin with the adding proportion of 2 percent of the quartz sand into the brick sand mold 1 with a barrel-shaped structure with the lower end sealed and the upper end opened, and standing the brick sand mold 1 at room temperature for 72 hours.

Step two: the riser sand mold is manufactured by mixing quartz sand and water glass according to a certain proportion and pressing the mixture into the riser sand mold 2, wherein the granularity of the quartz sand is 45 meshes, and the adding proportion of the water glass is 3.5 percent of the quartz sand. The riser sand mold 2 comprises a straight cylinder section a with the diameter larger than that of the brick sand mold 1, the lower end of the straight cylinder section a is communicated with an integrally formed closing-in section b, the diameter of the closing-in section b is reduced to be funnel-shaped, and the diameter of the lower end of the closing-in section b is the same as that of the brick sand mold 1. Then the riser sand mold 2 is placed in the temperature environment of 120 ℃ to be baked for 1.5 hours for shaping, and then is taken out for standby.

Step three, assembling a brick body sand mold and a riser sand mold; the brick body sand mold 1 is placed into the mold 3, then the riser sand mold 2 is placed at the opening end of the upper portion of the brick body sand mold 1, so that the brick body sand mold and the riser sand mold are coaxially distributed, and then a heat insulation medium layer 5 is filled between the outer walls of the brick body sand mold 1 and the riser sand mold 2 and the inner wall of the mold 3. The heat-insulating medium layer 5 is quartz sand with the granularity of 5 mm.

And step four, molding the pool wall brick casting mold, wherein zirconium coating layers 4 are sprayed on the inner walls of the brick body sand mold 1 and the riser sand mold 2, the main components of the zirconium coating layers 4 are alcohol-based zircon, and the spraying thickness is 0.5 mm.

Step five, casting pool wall bricks, wherein the components are as follows: ZrO (ZrO)₂: 32 %~44 %，Al₂O₃: 50%-40%，SiO₂:15.5~12.5 %，Na₂And (3) injecting a casting feed liquid with the O ratio of 1.5-1.25% into the pool wall brick casting mold, wherein the casting feed liquid firstly contacts the inner wall of the dead head sand mold when being injected into the pool wall brick casting mold, and then flows into the bottom of the brick body sand mold 1 under the flow guidance of the rear closing section b, so that the direct impact of the casting feed liquid to be cast on the bottom of the brick body sand mold 1 is reduced, the casting feed liquid is not injected after the casting feed liquid rises to a proper height in the brick body sand mold 1, and the pool wall brick can be obtained after the casting feed liquid is naturally cooled and solidified.