CN114230354A

CN114230354A - Air blowing pipe grouting slurry, grouting type air blowing pipe and preparation method thereof

Info

Publication number: CN114230354A
Application number: CN202210025553.7A
Authority: CN
Inventors: 符启慧; 萧子良; 李超林; 韦修功
Original assignee: Guangdong Xinlingnan Technology Co ltd
Current assignee: Guangdong Xinlingnan Technology Co ltd
Priority date: 2022-01-11
Filing date: 2022-01-11
Publication date: 2022-03-25
Anticipated expiration: 2042-01-11
Also published as: CN114230354B

Abstract

The invention provides a blowing pipe grouting slurry, a grouting type blowing pipe and a preparation method thereof, wherein the blowing pipe grouting slurry comprises the following components in parts by weight: 9-13 parts of first zircon aggregate, 7-11 parts of second zircon aggregate, 7.5-12 parts of third zircon aggregate, 23-28 parts of zircon sand, 14-24 parts of zircon ball powder, 15.5-20.5 parts of zircon micro powder, 2.5-3.5 parts of white mud, 0.4-0.6 part of silica sol, 0.02-0.06 part of water reducing agent and 6-7 parts of water; the particle size range of the first zircon aggregate is 1-3 mm, the particle size range of the second zircon aggregate is 1-2 mm, the particle size range of the third zircon aggregate is 0.5-1 mm, the particle size of zircon sand is 80-12 meshes, the particle size of zircon ball powder is less than 300 meshes, and the average particle size D50 of zircon micropowder is less than 10 mu m. The grouting slurry for the blowpipe has good fluidity, and the grouting type blowpipe has good erosion resistance and thermal shock resistance.

Description

Air blowing pipe grouting slurry, grouting type air blowing pipe and preparation method thereof

Technical Field

The invention relates to the technical field of refractory materials, in particular to a slurry for a blowpipe, a slurry-injection type blowpipe and a preparation method thereof.

Background

In recent years, zirconium-containing materials are widely used in the fields of metallurgy, construction, chemical industry and the like as a new refractory material. Zirconium-containing raw materials are widely used as refractory materials mainly because of their generally high melting temperature, strong erosion resistance, good thermal shock resistance and high chemical stability. Therefore, it is often used as a refractory for glass kilns, a refractory for gold industry, a refractory for cement kilns, a refractory for other industrial kilns, and the like.

Among refractory materials for glass melting furnaces, zirconium-containing refractory materials are mainly used in the melting section, upper section, side wall, throat, etc. of a glass melting furnace. When glass is produced in a glass melting furnace (such as a medium borosilicate glass electric melting furnace), glass liquid flows out from a tank furnace through a platinum channel, falls on a blowpipe made of refractory materials in a belt shape, the blowpipe is insulated by a muffle furnace heating system, the glass liquid flows to the lower end from the upper end of the blowpipe under the ceaseless rotation, the glass liquid is formed into a tubular shape by a blowing system inside the blowpipe, and then the glass liquid is drawn into the glass pipe by a pipe drawing tractor introduced through a graphite roller.

In the glass production process (especially the production process of the medium borosilicate glass), because the melting temperature of the molten glass is very high, the requirements on the high-temperature performance of the blowpipe of the zirconium-containing refractory material, especially the erosion resistance and the thermal shock resistance of the blowpipe are very high. The conventional blowpipe has difficulty in satisfying its performance requirements.

Disclosure of Invention

Based on the above, it is necessary to provide a blowing pipe grouting slurry, a grouting type blowing pipe and a preparation method thereof, wherein the blowing pipe grouting slurry and the grouting type blowing pipe have good slurry fluidity and good product erosion resistance and thermal shock resistance, aiming at the problem that the high-temperature performance of the traditional blowing pipe cannot meet the requirements.

In order to solve the technical problems, the technical scheme provided by the invention is as follows:

according to one aspect of the invention, the blowing pipe grouting slurry comprises the following components in parts by weight: 9 to 13 parts of first zircon aggregate, 7 to 11 parts of second zircon aggregate, 7.5 to 12 parts of third zircon aggregate, 23 to 28 parts of zircon sand, 14 to 24 parts of zircon ball powder, 15.5 to 20.5 parts of zircon micro powder, 2.5 to 3.5 parts of white mud, 0.4 to 0.6 part of silica sol, 0.02 to 0.06 part of water reducing agent and 6 to 7 parts of water;

the particle size range of the first zircon aggregate is 1-3 mm, the particle size range of the second zircon aggregate is 1-2 mm, the particle size range of the third zircon aggregate is 0.5-1 mm, the particle size of the zircon sand is 80-120 meshes, the particle size of the zircon ball powder is less than 300 meshes, and the average particle size D50 of the zircon micropowder is less than 10 microns.

In some embodiments, the composition comprises the following components in parts by weight: 9-11 parts of first zircon aggregate, 7-9.5 parts of second zircon aggregate, 7.5-12 parts of third zircon aggregate, 23-28 parts of zircon sand, 19-24 parts of zircon ball powder, 15.5-20.5 parts of zircon micro powder, 2.5-3.5 parts of white mud, 0.4-0.6 part of silica sol, 0.02-0.06 part of water reducer and 6-7 parts of water.

In some embodiments, the composition comprises the following components in parts by weight: 11 parts of first zircon aggregate, 9.5 parts of second zircon aggregate, 7.5 parts of third zircon aggregate, 28 parts of zircon sand, 19 parts of zircon ball powder, 15.5 parts of zircon miropowder, 3 parts of white mud, 0.5 part of silica sol, 0.02 part of water reducing agent and 6 parts of water.

In some of these embodiments, the first zircon aggregate, the second zircon aggregate, and the third zircon aggregate are each prepared from zircon ball powder, zircon micropowder, and a binder by mixing, press forming, sintering, crushing, and sieving.

In some of these embodiments, the first, second, and third zircon aggregates each have a bulk density of 3.9g/cm or more³The apparent porosity is less than or equal to 15 percent; and/or

The white mud comprises the following components in percentage by weight: al (Al)₂O₃≥35％、Fe₂O₃≤1％、TiO₂≤0.5％、R₂O is less than or equal to 1 percent and RO is less than or equal to 0.3 percent; and/or

The zircon sand, the zircon ball powder and the zircon micro powder comprise the following components in percentage by weight: ZrO (ZrO)₂≥65.5％、SiO₂≤34％、TiO₂≤0.12％、Fe₂O₃Less than or equal to 0.12 percent and Al₂O₃≤0.32％。

According to another aspect of the present invention, there is also provided a method for preparing a blowpipe grouting slurry, comprising the steps of:

providing raw materials according to the components of the blowing pipe grouting slurry; and

the raw materials of each component are mixed evenly according to the proportion.

In some of these embodiments, the method of preparing the first, second, and third zircon aggregates comprises the steps of:

mixing the zircon ball powder, the zircon micro powder and a binding agent, pressing and forming, sintering at the temperature of 1615-1625 ℃, crushing, and then screening.

According to another aspect of the present invention, there is also provided a method for manufacturing a slip casting type blowpipe, comprising the steps of:

vacuumizing and defoaming the blowing pipe grouting slurry under stirring;

adding the blowpipe grouting slurry subjected to vacuum defoaming into a casting forming mold;

demolding after the blowing pipe grouting slurry is hardened to obtain a blank body; and

and sintering the blank to obtain the grouting type blowpipe.

In some of these embodiments, the gate of the cast molding mold is located in a lower portion of the mold; and pressing the blowing pipe grouting slurry into the casting forming die from the pouring gate through 1-2 kg of air pressure.

According to another aspect of the invention, the grouting type blowpipe is prepared by the preparation method of the grouting type blowpipe.

Compared with the prior art, the invention has the following beneficial effects:

according to the invention, three kinds of zircon aggregates with different particle size ranges, zircon sand with a specific particle size, zircon ball powder, zircon micro powder and white mud are compounded to form a solid material of the blowing pipe grouting slurry; adding silica sol, a water reducing agent and water to form grouting slurry; the zircon aggregate, the zircon sand zirconium and the quartz ball powder in different particle size ranges are matched with each other, the addition of a small amount of white mud is favorable for improving the fluidity of the slurry, the addition of a small amount of zircon micro powder is also favorable for the flow of the slurry, and the addition of the water reducing agent can keep the slurry in good fluidity under the condition of reducing the water consumption; through the interaction among the components, the slurry for the blowpipe grouting has good fluidity, and is favorable for forming a grouting type blowpipe with higher density and better erosion resistance and thermal shock resistance in the grouting process.

According to the preparation method of the grouting type blowpipe, the blowpipe product with the special-shaped structure, which is high in density and excellent in erosion resistance and thermal shock resistance, can be obtained by adopting the blowpipe grouting slurry and vacuumizing and defoaming treatment before grouting, and adopting a special grouting mold.

Drawings

FIG. 1 is a schematic view of a vacuum stirring tank used in one embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a casting mold used in an embodiment of the present invention.

Fig. 3 is a photograph of a slip casting type blowpipe according to an embodiment of the present invention.

FIG. 4 is an appearance view of various materials after a dynamic molten glass corrosion resistance test at 1350 ℃.

FIG. 5 is a graph showing the analysis of various materials after a dynamic molten glass erosion resistance test at 1350 ℃.

FIG. 6 is an appearance of various materials after dynamic molten glass corrosion resistance test at 1450 deg.C.

FIG. 7 is a graph showing the profiles of various materials after a dynamic molten glass erosion resistance test at 1450 ℃.

Description of reference numerals:

10. a vacuum stirring tank; 11. a tank body; 12. a feed inlet; 13. a discharge port; 14. a discharge ball valve; 15. vacuumizing a tube; 16. a stirrer; 20. pouring a mold; 21. enclosing a mould plate; 22. a mold base; 23. and a pouring gate.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings, which illustrate embodiments of the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.

Some embodiments of the present invention provide a blowpipe grouting slurry, which comprises the following components in parts by weight: 9 to 13 parts of first zircon aggregate, 7 to 11 parts of second zircon aggregate, 7.5 to 12 parts of third zircon aggregate, 23 to 28 parts of zircon sand, 14 to 24 parts of zircon ball powder, 15.5 to 20.5 parts of zircon micro powder, 2.5 to 3.5 parts of white mud, 0.4 to 0.6 part of silica sol, 0.02 to 0.06 part of water reducing agent and 6 to 7 parts of water.

Wherein the particle size range of the first zircon aggregate is 1-3 mm, the particle size range of the second zircon aggregate is 1-2 mm, the particle size range of the third zircon aggregate is 0.5-1 mm, the particle size of the zircon sand is 80-120 meshes, the particle size of the zircon ball powder is less than 300 meshes, and the average particle size D50 of the zircon micropowder is less than 10 mu m.

According to the invention, three kinds of zircon aggregates with different particle size ranges, zircon sand, zircon ball powder and zircon micro powder with specific particle sizes and white mud are compounded to form a solid material of the blowing pipe grouting slurry; adding silica sol, a water reducing agent and water to form grouting slurry; the zircon aggregate, the zircon sand zirconium and the quartz ball powder in different particle size ranges are matched with each other to improve the flowability of the powder, the addition of a small amount of white mud is favorable for improving the flowability of the slurry, the addition of a small amount of zircon micro powder is also favorable for the flow of the slurry, and the addition of the water reducing agent can keep the slurry in good flowability under the condition of reducing the water consumption; through the interaction among the components, the slurry for the blowpipe grouting has good fluidity, and is favorable for forming a grouting type blowpipe with higher density and better erosion resistance and thermal shock resistance in the grouting process.

In some preferred embodiments, the blowpipe grouting slurry comprises the following components in parts by weight: 9 to 11 parts of first zircon aggregate, 7 to 9.5 parts of second zircon aggregate, 7.5 to 12 parts of third zircon aggregate, 23 to 28 parts of zircon sand, 19 to 24 parts of zircon ball powder, 15.5 to 20.5 parts of zircon micro powder, 2.5 to 3.5 parts of white mud, 0.4 to 0.6 part of silica sol, 0.02 to 0.06 part of water reducing agent and 6 to 7 parts of water.

Through experimental research, the grouting type blowpipe prepared by adopting the blowpipe grouting slurry with the proportion can obtain better comprehensive performance in the aspects of density, erosion resistance and thermal shock resistance. The obtained grouting type blowpipe has the apparent porosity of about 17.4 to 18.5 percent and the volume density of 3.72g/cm³～3.74g/cm³The cold pressing strength is about 147MPa to 155 MPa.

In one preferred specific example, the blowpipe grouting slurry comprises the following components in parts by weight: 11 parts of first zircon aggregate, 9.5 parts of second zircon aggregate, 7.5 parts of third zircon aggregate, 28 parts of zircon sand, 19 parts of zircon ball powder, 15.5 parts of zircon micro powder, 3 parts of white mud, 0.5 part of silica sol, 0.02 part of water reducing agent and 6 parts of water.

Under the condition of the component proportion, the apparent porosity of the prepared grouting type blowpipe is only about 17.4 percent, and the volume density reaches 3.74g/cm³The cold pressing strength can reach about 147MPa, and the composite material has more excellent comprehensive performance.

In some embodiments, the first zircon aggregate, the second zircon aggregate and the third zircon aggregate in the blowpipe grouting slurry are prepared from zircon ball powder, zircon micro powder and a binding agent sequentially through the processes of mixing, press forming, sintering, crushing and screening. Specifically, the mass ratio of the zircon ball powder, the zircon micro powder and the binder can be 64%: 34.6%: 1.4 percent. Wherein the binder can be dextrin, peach gum powder or lignin powder.

The 80-120-mesh zircon sand used in the blowing pipe grouting slurry is obtained by screening purchased zircon sand raw particles; the zircon ball powder and the zircon micro powder are obtained by grinding (such as vertical grinding or stirring grinding) purchased zircon sand raw particles; the white mud, the silica sol and the water reducing agent can be purchased products. Wherein the water reducing agent can adopt sodium hexametaphosphate.

It should be noted that the mass ratio of the zircon ball powder, the zircon micro powder and the bonding agent in the zircon aggregate is not limited to the above mixture ratio, but can be adjusted adaptively according to the performance of the required zircon aggregate; the binder is not limited to the specific type described above, but other types of binders available for zircon aggregates may be used. Likewise, the water reducing agent used in the blowpipe grouting slurry is not limited to sodium hexametaphosphate, and other similar water reducing agents that are available may be used.

In some embodiments, the bulk density of the first zircon aggregate, the second zircon aggregate, and the third zircon aggregate used in the blowpipe grouting slurry are each equal to or greater than 3.9g/cm³The apparent porosity is less than or equal to 15 percent. The volume density and apparent porosity of the three zircon aggregates,the zircon aggregate can be obtained by adjusting the mass ratio of the zircon ball powder, the zircon micro powder and the bonding agent in each zircon aggregate and adjusting the preparation process parameters of each zircon aggregate.

In some embodiments, the components of the zircon sand, the zircon ball powder and the zircon micro powder used in the slurry for the blast pipe grouting all include, by weight: ZrO (ZrO)₂≥65.5％、SiO₂≤34％、TiO₂≤0.12％、Fe₂O₃Less than or equal to 0.12 percent and Al₂O₃Less than or equal to 0.32 percent; the white mud comprises the following components in percentage by weight: al (Al)₂O₃≥35％、Fe₂O₃≤1％、TiO₂≤0.5％、R₂O is less than or equal to 1 percent and RO is less than or equal to 0.3 percent. R₂In O, R represents alkali metal such as Na, K and the like; in RO, R represents an alkaline earth metal such as Ca, Mg, etc.

In another embodiment of the present invention, there is provided a method for preparing the above-mentioned blowpipe grouting slurry, including the steps S100 and S200 of:

step S100: the components of the above-described barrel slip slurry according to the present invention provide the raw materials.

Specifically, a first zircon aggregate, a second zircon aggregate, a third zircon aggregate, 80-120-mesh zircon sand, less than 300-mesh zircon ball powder, zircon micro powder with an average particle size D50 of less than 10 μm, white mud, silica sol, a water reducing agent and water are prepared.

Wherein, each zircon aggregate is prepared by mixing zircon ball powder, zircon micro powder and a bonding agent in turn, pressing and molding, sintering, crushing and screening; 80-120 meshes of zircon sand is obtained by screening purchased zircon sand raw particles; the zircon ball powder and the zircon micro powder are obtained by grinding purchased zircon sand raw particles; white mud, silica sol and water reducing agent are directly purchased from outsourcing.

Specifically, various zircon aggregates are prepared by the following method: mixing the zircon ball powder, the zircon micro powder and the binding agent in a roller ball mill or a double helix conical mixer for 2 hours according to a certain proportion, pressing and molding, then sintering in a tunnel kiln at the temperature of 1615-1625 ℃, crushing in a jaw crusher, and then sieving to obtain the zircon aggregate with different average particle sizes and various specifications.

Step S200: the raw materials of the components are mixed evenly according to the proportion.

Specifically, adding zircon aggregate of various specifications, 80-120-mesh zircon sand, zircon ball powder smaller than 300 meshes, zircon micro powder with the average particle size D50 being less than 10 mu m, white mud and silica sol into a mortar machine according to a proportion and mixing for about 2 min; and adding a water reducing agent and water, continuously wet-mixing for about 5min, and discharging to obtain the blowing pipe grouting slurry.

In another embodiment of the present invention, there is provided a method for manufacturing a slip casting type blowpipe, the method including steps S300 to S600 of:

step S300: the blowing pipe grouting slurry is vacuumized and defoamed under stirring.

The vacuum defoaming operation is carried out in a specially-made vacuum stirring tank 10. Referring to fig. 1, the vacuum stirring tank 10 includes a tank body 11, a charging port 12, a discharging port 13, a discharging ball valve 14, an evacuating pipe 15 and a stirrer 16.

Wherein, the feed inlet 12 is arranged at the upper part of the tank body 11; the discharge port 13 is arranged at the bottom of the tank body 11; a discharge ball valve 14 is arranged at the discharge port 13 and used for opening or closing the discharge port 13; the evacuation tube 15 is provided at the top of the tank 11. The feed inlet 12, the discharge port 13 and the vacuum tube 15 are all communicated with the inner cavity of the tank body 11, and the vacuum tube 15 is provided with an air inlet valve. The stirrer 16 is arranged in the tank body 11, the upper end of a stirring rod of the stirrer 16 extends out of the top of the tank body 11 and is connected with a motor gearbox, and the part of the stirring rod extending out of the tank body 11 needs to be subjected to dynamic sealing treatment.

In the vacuum-pumping and defoaming process, the discharge ball valve 14 is closed first to ensure the discharge port 13 to be sealed; adding the blowing pipe grouting slurry into a vacuum stirring tank 10, and sealing a feeding port 12 after the slurry is added; starting the stirrer 16, and starting a vacuumizing device to pump out bubbles in the slurry; after the bubbles in the slurry are discharged (no bubbles overflow on the slurry surface), the air inlet valve is opened to introduce air, so that the pressure difference between the inside and the outside of the tank body 11 is zero, and then the air inlet valve is closed.

The invention adopts the special vacuum stirring tank 10, and the slurry is vacuumized and defoamed before casting molding, so that the air holes in the tube blank of the blowpipe can be reduced, the density of the blowpipe product is improved, and the erosion resistance of the blowpipe is improved.

Step S400: and adding the blast pipe grouting slurry subjected to vacuum defoaming into a casting forming mold.

The casting molding adopts a special casting mold 20. Referring to fig. 2, the casting mold 20 includes two mold enclosures 21, a mold base 22, and a mold core (not shown). When the pouring mold 20 is used, the two mold enclosing plates 21, the mold base 22 and the mold core are combined and fixed, the mold core is positioned in the middle of an inner cavity formed by combining the two mold enclosing plates 21, the outer wall of the mold core and the inner wall of the mold enclosing plate 21 are separated from each other at intervals, and a pouring cavity with the lower part being in the shape of an inverted truncated cone and the upper part being in the shape of a cylinder is formed. A pouring opening 23 is provided in one of the mould enclosing plates 21, which pouring opening 23 communicates with the pouring cavity.

During grouting, two ends of a hose are respectively connected with the discharge port 13 and the pouring port 23, the discharge ball valve 14 is opened, blowing pipe grouting slurry is added into a pouring cavity of the pouring mold 20, and the discharge ball valve 14 is closed after the pouring cavity is filled with the slurry.

Specifically, the pouring gate 23 in the pouring mold 20 is provided at the lower portion of the mold shroud 21; when slurry is added, the casting mold 20 is positioned below the discharging ball valve 14, an air inlet valve on the vacuumizing pipe 15 is opened, a vacuum machine is started to add positive pressure into the tank body 11, and the blowing pipe grouting slurry in the tank body 11 is pressed into a casting cavity of the casting mold 20 from a casting port 23 positioned below the mold through 1 kg-2 kg of air pressure.

The invention adopts a special casting mould 20, a casting port 23 is arranged at the lower part of a mould enclosing plate 21, and slurry is pressed into a casting cavity of the casting mould 20 from bottom to top under the condition of positive pressure. By combining the pouring mold 20 and the grouting mode, the air holes of the blowpipe blank can be effectively reduced, the density and the strength of the blank are improved, the erosion resistance and the thermal shock resistance of the blowpipe product are further improved, and the blowpipe product with more excellent comprehensive performance is obtained.

Step S500: and demolding after the slurry injected into the blowing pipe is hardened to obtain a blank.

After the grouting slurry is added into the casting cavity of the casting mold 20, the casting mold 20 is detached after being left for a period of time (generally 10 to 12 hours). During demoulding, firstly taking out a plug for plugging the pouring gate 23, then lifting out the mold core, and then disassembling the two mold coamings 21; and then the die base 22 is taken down after the blank is completely hardened after the blank is placed for 4 to 6 hours.

Step S600: and sintering the blank to obtain the grouting type blowpipe.

After demoulding to obtain a blowpipe blank, the blank is subjected to trimming treatment, the position of a pouring gate of the blank is trimmed, and the flatness of the conical surface at the lower part of the blank is kept; then placing the repaired blank into a shuttle kiln for sintering and molding, wherein the sintering temperature is 1420 ℃, and the sintering time is 10-12 h; and after sintering, processing and grinding the upper and lower surfaces, the cylindrical surface and the conical surface of the blowpipe to obtain the blowpipe product.

The preparation method of the grouting type blowpipe has the advantages that the process flow is simple, and the blowpipe product with the special-shaped structure, which is high in density and excellent in erosion resistance and thermal shock resistance, can be obtained. Can well meet the performance requirements of glass production process (especially the production process of medium borosilicate glass) on the fire-resistant material blowpipe. The grouting type blowpipe has longer service life, and the thermal shock resistance and the erosion resistance of the grouting type blowpipe are obviously superior to those of the blowpipes made of materials such as sillimanite, corundum and the like on the market.

Referring to fig. 3, in some embodiments of the present invention, a grouting type blowpipe is also provided. The grouting type blowpipe adopts the blowpipe grouting slurry and is prepared by the preparation method of the grouting type blowpipe. The grouting type blowpipe has the advantages of low apparent porosity, high density and hardness, good erosion resistance and thermal shock resistance.

The present invention will be further described with reference to specific examples and comparative examples, which should not be construed as limiting the scope of the present invention.

Example 1:

the blowing pipe grouting slurry comprises the following components in parts by weight: 11 parts of first zirconite aggregate, 9.5 parts of second zirconite aggregate, 7.5 parts of third zirconite aggregate, 28 parts of zircon sand, 19 parts of zirconite ball powder, 15.5 parts of zirconite micro powder, 3 parts of white mud, 0.5 part of silica sol, 0.02 part of sodium hexametaphosphate and 6 parts of water.

The zircon aggregate is prepared from zircon ball powder, zircon micro powder and a bonding agent according to the mass ratio of 64%: 34.6%: mixing 1.4% of the zircon aggregate in a roller ball mill for 2 hours, pressing and molding, sintering in a tunnel kiln at the temperature of 1615-1625 ℃, crushing in a jaw crusher, and sieving to obtain the zircon aggregates with different particle size ranges and various specifications. The 80-120 mesh zircon sand is obtained by screening purchased zircon sand raw particles. The zircon ball powder and the zircon micro powder are obtained by grinding purchased zircon sand raw particles.

Adding the above zircon aggregate with various specifications, 80-120 meshes of zircon sand, less than 300 meshes of zircon ball powder, 10 mu m zircon micro powder with the average particle size D50, white mud and silica sol into a mortar machine according to the proportion and mixing for about 2 min; and adding sodium hexametaphosphate and water, continuously wet-mixing for about 5min, and discharging to obtain the blowing pipe grouting slurry.

And (3) vacuumizing and defoaming the blowing pipe grouting slurry under stirring. Closing the discharge ball valve 14 to ensure that the discharge port 13 is sealed; adding the blowing pipe grouting slurry into a vacuum stirring tank 10, and sealing a feeding port 12 after the slurry is added; starting the stirrer 16, and starting a vacuumizing device to pump out bubbles in the slurry; after the bubbles in the slurry are discharged (no bubbles overflow on the slurry surface), the air inlet valve is opened to introduce air, so that the pressure difference between the inside and the outside of the tank body 11 is zero, and then the air inlet valve is closed.

And adding the blast pipe grouting slurry subjected to vacuum defoaming into a casting forming mold. A pouring gate 23 in the pouring mold 20 is provided at the lower part of the mold shroud 21. When slurry is added, the casting mold 20 is positioned below the discharging ball valve 14, an air inlet valve on the vacuumizing pipe 15 is opened, a vacuum machine is started to add positive pressure into the tank body 11, and the blowing pipe grouting slurry in the tank body 11 is pressed into a casting cavity of the casting mold 20 from a casting port 23 positioned below the mold through 1 kg-2 kg of air pressure.

And (3) after the grouting slurry is added into the casting cavity of the casting mold 20, standing for 10-12 h, and then removing the casting mold 20. During demoulding, firstly taking out a plug for plugging the pouring gate 23, then lifting out the mold core, and then disassembling the two mold coamings 21; and then the die base 22 is taken down after the blank is completely hardened after the blank is placed for 4 to 6 hours.

After demoulding to obtain a blowpipe blank, trimming the blank, flattening the position of a pouring gate of the blank, and keeping the lower conical surface of the blank flat; then placing the repaired blank into a shuttle kiln for sintering and molding, wherein the sintering temperature is 1420 ℃, and the sintering time is 10-12 h; and after sintering, processing and grinding the upper and lower surfaces, the cylindrical surface and the conical surface of the blowpipe to obtain the grouting blowpipe product.

The apparent porosity, the volume density, the cold pressing strength, the erosion resistance and the thermal shock resistance of the grouting type blowpipe at 1350 ℃ are detected. Wherein, the detection method of the apparent porosity and the volume density is GB/T2997-2015; the detection method of the cold pressing strength is as GB/T5072-2008; the detection method of the erosion resistance is as JC/T806-2013; the thermal shock resistance was determined in accordance with DIN 51068: 2008. The results are shown in Table 1.

Example 2:

the method for producing the blowpipe and the method for producing the blowpipe slip casting slurry according to the present example are the same as those in example 1, and are different from those in example 1 in that: the composition of the slurry injected by the blowpipes is different. In this embodiment, the blowing pipe grouting slurry comprises the following components in parts by weight: 13 parts of first zircon aggregate, 11 parts of second zircon aggregate, 9 parts of third zircon aggregate, 23 parts of 80-120-mesh zircon sand, 14 parts of zircon ball powder with the particle size of less than 300 meshes, 20.5 parts of zircon micro powder with the average particle size D50 being less than 10 mu m, 3 parts of white mud, 0.5 part of silica sol, 0.02 part of sodium hexametaphosphate and 6 parts of water.

The apparent porosity, the bulk density, the cold pressing strength, the erosion resistance and the thermal shock resistance of the grouting type blowpipe prepared in the embodiment are detected. The detection method was the same as in example 1. The results are shown in Table 1.

Example 3:

the method for producing the blowpipe and the method for producing the blowpipe slip casting slurry according to the present example are the same as those in example 1, and are different from those in example 1 in that: the composition of the slurry injected by the blowpipes is different. In this embodiment, the blowing pipe grouting slurry comprises the following components in parts by weight: 13 parts of first zircon aggregate, 11 parts of second zircon aggregate, 9 parts of third zircon aggregate, 28 parts of 80-120-mesh zircon sand, 14 parts of zircon ball powder with the particle size of less than 300 meshes, 15.5 parts of zircon micro powder with the average particle size D50 being less than 10 mu m, 3 parts of white mud, 0.5 part of silica sol, 0.02 part of sodium hexametaphosphate and 6 parts of water.

Example 4:

the method for producing the blowpipe and the method for producing the blowpipe slip casting slurry according to the present example are the same as those in example 1, and are different from those in example 1 in that: the composition of the slurry injected by the blowpipes is different. In this embodiment, the blowing pipe grouting slurry comprises the following components in parts by weight: 13 parts of first zircon aggregate, 11 parts of second zircon aggregate, 9 parts of third zircon aggregate, 23 parts of 80-120-mesh zircon sand, 19 parts of zircon ball powder with the particle size of less than 300 meshes, 15.5 parts of zircon micro powder with the average particle size D50 being less than 10 mu m, 3 parts of white mud, 0.5 part of silica sol, 0.02 part of sodium hexametaphosphate and 6 parts of water.

Example 5:

the method for producing the blowpipe and the method for producing the blowpipe slip casting slurry according to the present example are the same as those in example 1, and are different from those in example 1 in that: the composition of the slurry injected by the blowpipes is different. In this embodiment, the blowing pipe grouting slurry comprises the following components in parts by weight: 9 parts of first zircon aggregate, 7 parts of second zircon aggregate, 12 parts of third zircon aggregate, 23 parts of 80-120-mesh zircon sand, 24 parts of zircon ball powder with the particle size of less than 300 meshes, 20.5 parts of zircon micro powder with the average particle size D50 being less than 10 mu m, 3 parts of white mud, 0.5 part of silica sol, 0.02 part of sodium hexametaphosphate and 6 parts of water.

Example 6:

the method for producing the blowpipe and the method for producing the blowpipe slip casting slurry according to the present example are the same as those in example 1, and are different from those in example 1 in that: the composition of the slurry injected by the blowpipes is different. In this embodiment, the blowing pipe grouting slurry comprises the following components in parts by weight: 11 parts of first zircon aggregate, 7.5 parts of second zircon aggregate, 9.5 parts of third zircon aggregate, 28 parts of 80-120-mesh zircon sand, 19 parts of zircon ball powder smaller than 300 meshes, 15.5 parts of zircon micro powder with the average particle diameter D50 being smaller than 10 mu m, 3 parts of white mud, 0.5 part of silica sol, 0.02 part of sodium hexametaphosphate and 6 parts of water.

Comparative example 1:

the method of producing the blowpipe grouting slurry of this comparative example was the same as in example 1, and the composition of the blowpipe grouting slurry was also the same as in example 1. Compared with example 1, the difference is that: the blowpipes are produced in different ways. In the preparation method of the blowpipe of the comparative example, the slurry is not subjected to vacuum-pumping defoaming treatment before grouting.

The apparent porosity, the volume density, the cold pressing strength, the erosion resistance and the thermal shock resistance of the grouting type blowpipe prepared by the comparative example are detected. The detection method was the same as in example 1. The results are shown in Table 1.

Table 1 results of performance tests of the blowpipe products of the respective examples and comparative examples

As can be seen from Table 1, the grouting type blowpipes of the embodiments 1-6 of the invention have good comprehensive performance in the aspects of apparent porosity, volume density, cold pressing strength, erosion resistance and thermal shock resistance.

Further, the grouting type air blowing pipes of examples 1 and 5 of the present invention have a lower apparent porosity and a higher bulk density, and have a higher cold-press strength. The corrosion resistance is obviously better than that of the comparative example 1 and other examples.

Furthermore, with the more preferred composition ratios of example 1, the barrel has a significantly lower apparent porosity and a higher bulk density than example 5, while its cold-pressed strength is only slightly reduced. Compared with the example 1, the blowpipe obtained in the comparative example 1 has obviously increased apparent porosity, obviously reduced volume density and cold pressing strength and obviously poorer erosion resistance compared with the example 1 because the composition proportion is the same as that of the example 1 and the slurry is not subjected to vacuum-pumping defoaming treatment before grouting.

The grouting type blowpipe obtained in the embodiment 1 of the invention is subjected to a dynamic molten glass corrosion resistance detection comparison test with isostatic compaction zircon, zirconia alumina, zircon-containing sillimanite and refractory products with the code numbers of CAM-90 and CAM-D. The glass liquid used in the test is medium boron glass for building up electrons, the flow rate of the glass liquid is 45 m/h, the test temperature is 1350 ℃ and 72h, and the shape of the sample is 15mm multiplied by 108 mm. The test results are shown in table 2.

Table 21350 deg.c detection results of dynamic anti-glass liquid corrosion contrast test for each material

As can be seen from Table 2, the blowing pipe of example 1 of the present invention had a significantly smaller unidirectional erosion at 1/2 below the liquid line than the comparative products CAM-90, CAM-D, zircon corundum and zircon-containing sillimanite. Although the index of the unidirectional erosion amount at 1/2 below the liquidus line of the isostatic pressed zircon is better than that of example 1, the isostatic pressed zircon has poor thermal shock resistance and the combination of the thermal shock resistance and the thermal shock resistance is inferior to that of example 1.

The appearance of each sample after the erosion test is shown in FIG. 4; the profile of each sample is shown in fig. 5. In FIGS. 4 and 5, from left to right, are samples of zircon, the product of example 1, CAM-90, CAM-D zircon corundum, and zircon-containing sillimanite, respectively. Cracks near the liquid line of the CAM-90 sample and the zircaloy-containing silica sample in fig. 5 were caused by post-test grinding.

TABLE 3 comparative test results of thermal shock resistance of each material

Table 3 shows the results of comparative tests on thermal shock resistance of the grouting type blowpipe obtained in example 1 of the present invention with isostatic compaction zircon, zircon corundum, zircon-containing sillimanite, and refractory products having CAM-90 and CAM-D designations. As can be seen from Table 3, the slip casting type blowpipe of the present invention has good thermal shock resistance. Meanwhile, the comparative products, namely the isostatic compaction zircon, the CAM-90 and the CAM-D, have poorer thermal shock resistance.

The grouting type blowpipe obtained in the embodiment 1 of the invention is subjected to a dynamic molten glass corrosion resistance detection comparison test with isostatic compaction zircon, zirconia alumina, zircon-containing sillimanite and refractory products with the code numbers of CAM-90 and CAM-D at the test temperature of 1450 ℃ for 72 h. The other test conditions were the same as the above test except that the test temperature was changed to 1450 ℃ C.. times.72 h. The test results are shown in table 4.

Table 41450 deg.c detection result of dynamic anti-glass liquid corrosion contrast test for each material

As can be seen from Table 4, the blowing pipe of example 1 of the present invention had a significantly smaller unidirectional erosion at 1/2 below the liquid line than the comparative products CAM-90, CAM-D, zircon corundum and zircon-containing sillimanite. Although the index of the unidirectional erosion amount at 1/2 below the liquid surface line of the isostatic pressing zircon is better than that of the example 1, the thermal shock resistance of the isostatic pressing zircon is poor, and the comprehensive performance of the isostatic pressing zircon is inferior to that of the example 1.

The appearance of each sample after the erosion detection is shown in fig. 6; the profile of each sample is shown in fig. 7. In FIGS. 6 and 7, from left to right, are the isostatic-formed zircon, the product of example 1, CAM-90, CAM-D zircon corundum, and zircon-containing sillimanite samples, respectively. The CAM-90 and CAM-D samples broke down into the crucible containing the molten glass during the test, indicating poor resistance to erosion.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The blowing pipe grouting slurry is characterized by comprising the following components in parts by weight: 9 to 13 parts of first zircon aggregate, 7 to 11 parts of second zircon aggregate, 7.5 to 12 parts of third zircon aggregate, 23 to 28 parts of zircon sand, 14 to 24 parts of zircon ball powder, 15.5 to 20.5 parts of zircon micro powder, 2.5 to 3.5 parts of white mud, 0.4 to 0.6 part of silica sol, 0.02 to 0.06 part of water reducing agent and 6 to 7 parts of water;

2. The blowpipe grouting slurry of claim 1, comprising the following components in parts by weight: 9-11 parts of first zircon aggregate, 7-9.5 parts of second zircon aggregate, 7.5-12 parts of third zircon aggregate, 23-28 parts of zircon sand, 19-24 parts of zircon ball powder, 15.5-20.5 parts of zircon micro powder, 2.5-3.5 parts of white mud, 0.4-0.6 part of silica sol, 0.02-0.06 part of water reducer and 6-7 parts of water.

3. The blowpipe grouting slurry of claim 1, comprising the following components in parts by weight: 11 parts of first zircon aggregate, 9.5 parts of second zircon aggregate, 7.5 parts of third zircon aggregate, 28 parts of zircon sand, 19 parts of zircon ball powder, 15.5 parts of zircon miropowder, 3 parts of white mud, 0.5 parts of silica sol, 0.02 part of water reducing agent and 6 parts of water.

4. The blowpipe grouting slurry of claim 1, wherein the first zircon aggregate, the second zircon aggregate, and the third zircon aggregate are each prepared from zircon ball powder, zircon micro powder, and a binder by mixing, press forming, sintering, crushing, and screening.

5. The blowpipe grouting slurry of any one of claims 1 to 4, wherein the bulk densities of the first, second, and third zircon aggregates are each equal to or greater than 3.9g/cm³The apparent porosity is less than or equal to 15 percent; and/or

6. The preparation method of the blowing pipe grouting slurry is characterized by comprising the following steps:

providing a feedstock for each component of a barrel grouting slurry according to any of claims 1 to 5; and

7. The method of preparing blowpipe grouting slurry of claim 6, wherein the method of preparing the first, second, and third zircon aggregates comprises the steps of:

8. The preparation method of the grouting type blowpipe is characterized by comprising the following steps of:

vacuumizing and defoaming the blowpipe grouting slurry of any one of claims 1 to 5 under stirring;

and sintering the blank to obtain the grouting type blowpipe.

9. The method for manufacturing a slip casting type blowpipe according to claim 8, wherein a pouring gate of the casting mold is located at a lower portion of the mold; and pressing the blowing pipe grouting slurry into the casting forming die from the pouring gate through 1-2 kg of air pressure.

10. A slip casting type blowpipe characterized by being produced by the production method according to claim 8 or 9.