CN107445633A - A kind of liquid grouting material and preparation method and application method for coke oven furnace wall crack hot patching - Google Patents

Abstract

The invention discloses a liquid grouting material for thermal repair of coke oven wall cracks and a preparation method thereof, which consists of 100 parts by mass of water glass, 100-250 parts of solid filler and 9-16 parts of additives. The solid filler is composed of 50%-70% mullite, 20%-30% refractory clay and 10%-20% quartz sand in terms of mass percentage, and the additives are composed of dispersant, penetrant and defoamer. The additives and solid fillers are added to the water glass solution and mixed evenly to obtain a liquid grouting material for thermal repair of cracks in the coke oven wall. It is easy to pump and has good compatibility with the repaired refractory It is a grouting material with excellent cohesiveness, wide curable sintering temperature and convenient construction. The raw materials are cheap and easy to obtain, no harm to the human body, short preparation period, and simple preparation method, so it has the characteristics of low production cost, environmentally friendly production process, no pollution, and can be produced in batches.

Description

A liquid grouting material for thermal repair of coke oven wall cracks and its preparation method and how to use

technical field

The invention relates to a liquid grouting material for hot repair of coke oven wall cracks, a preparation method and a use method, especially a heat-resistant high-strength non-shrinkage grouting material used in a high-temperature environment, which can be widely used in high-temperature facilities such as coke ovens The filling and repairing of wall cracks belongs to the coking field in the metallurgical coal chemical industry.

Background technique

In the long-term use of coke oven, it is affected by high temperature, mechanical and physical and chemical reactions, and the furnace body always tends to be gradually aging and damaged. After the start of production, due to the temperature shock of sudden changes in cold and heat caused by operations such as opening and closing of the furnace door, coal loading and coking, mechanical collision, extrusion, friction, and the erosion of certain harmful substances in the gas, various parts of the furnace body gradually produce damage. In addition, since the coke oven body is mainly built with refractory materials such as high thermal conductivity silica bricks, and the temperature is between 1000 and 1650 ° C, the special crystal transformation of silica bricks is irreversible and limited by high temperature conditions, so cold repairs, fire mud, etc. are not allowed. Common plastering mud will produce cracks and shrinkage when repairing in a hot state, and the strength after repairing cannot meet the requirements, and the hanging time is short, which will cause further damage to the matrix silica bricks in severe cases. Therefore, it is required that the hot repair material should have the following characteristics: after grouting, it can be firmly bonded with the repaired body and has certain plasticity, and it will not damage the furnace brick, and it is necessary to prevent the hot brick from cracking due to extreme cold; During sintering, the shrinkage rate and expansion rate are similar to those of furnace bricks, and the service life is long; under long-term operating conditions, it can resist mechanical wear and chemical corrosion, and has a relatively high refractoriness without melting.

In addition, the graphite generated by gas pyrolysis during the coking process will continue to deposit in the pores of the brick, and then form a graphite layer that is firmly bonded to the brick. When removing the graphite, it is easy to stick the surface of the brick, making the brick surface rough. , which further promotes the growth of graphite. Graphite entering the cracks of the bricks, when the pressure is not well controlled or the coking time is too long, it is easy to be burned by the air leaking into the carbonization chamber, so that the raw gas burns in the cracks and causes local high temperature, and even burns the furnace wall bricks, widening the crack. If effective control measures are not taken in time, it will not only affect the normal operation of the blast furnace, reduce the working life of the blast furnace, and affect the output; but also have a bad impact on the surrounding environment, endangering the health and personal safety of the surrounding workers.

In Chinese patents CN101654354 B and CN101597497 B, diethylene glycol ethyl ether acetate and glyceryl triacetate are respectively used as curing agents. After curing with water glass, the serous calculus rate is low, and a certain proportion of water remains in the upper part of the calculus body; the serous The stone body is in the form of white powder, and the cementation strength of the pure stone body is almost non-existent; after the stone body is solidified, it is easy to lose water and shrink, and the water loss shrinkage rate can reach more than 80%, resulting in poor effect; the curing agent has a strong smell and is harmful to the respiratory tract. It is very irritating, and various disadvantages prevent it from being the first choice for high-temperature furnace body grouting materials.

In the Chinese patent CN102010212B "A Heating Furnace Repair Material and Its Preparation Method", 2~20% of sodium silicate and/or sodium metasilicate is used as a binder, and 97~80% of corundum, alumina or Mullite is the main raw material, 0.5-8% silica powder, 0.5-8% alumina powder or 0.5-8% alumina powder are used as sintering aids, and the above raw materials are mixed evenly to prepare a heating furnace repair material. Put the above-mentioned repair material into the pit to be repaired at the bottom of the heating furnace in normal operation with a hopper or shovel on site. After 3-4 hours of sintering, the repair material of the heating furnace and the refractory material at the bottom of the furnace are sintered into a whole. Normal use; due to poor fluidity and long sintering time, it is only suitable for repairing the pits on the bottom surface of the heating furnace, but not suitable for bonding and repairing fine cracks in the coke oven body.

Therefore, due to the particularity of the coking process and the furnace body, it is imminent to find a grouting material suitable for repairing cracks in the coke oven body that meets the above stringent requirements. The better bonding degree and high temperature stability of bricks and other refractory materials have become the key to the research of grouting materials. The present invention aims to solve the technical problems existing in the above grouting materials.

Contents of the invention

One of the objects of the present invention is to provide a liquid grouting material for thermal repair of coke oven wall cracks, which has good fluidity in a certain temperature range such as room temperature It can better fill the cracks; the thermal expansion coefficient of the solid block after sintering is small, and the performance is stable so that the furnace body will not be damaged again, and its high temperature resistance, high strength and bonding degree with the repaired refractory material it is good. The grouting material is sintered at 1100°C for 2 hours, and the light solid block obtained after sintering has a certain bonding strength, and has a small odor, and the outflow time meets the requirements of GB/T1723-93≦150s.

The second object of the present invention is to provide the above-mentioned preparation method of a liquid grouting material for thermal repair of cracks in the coke oven wall. This preparation method only needs to pay attention to the specific order of adding raw materials and only has physical functions such as mixing and stirring. Therefore, it has the characteristics of simple preparation steps, small workload and safe operation.

The third object of the present invention is to provide a method for using the above-mentioned liquid grouting material for thermal repair of cracks in the coke oven wall.

Technical principle of the present invention

A liquid grouting material used for hot-state repair of cracks in coke oven walls of the present invention is injected into the gaps through high-pressure grouting, and then self-sintered under high temperature, so that grouting materials such as water glass and refractory clay become high-strength corundum-mullite systems. Solid matter, and can be well combined with the refractory material of the furnace wall, so as to realize the effect of caulking and repairing.

Technical scheme of the present invention

A liquid grouting material used for thermal repair of coke oven wall cracks, calculated by parts by mass, its raw material composition and content are as follows:

100 parts of water glass;

100-250 parts of solid filler;

9 to 16 parts of additives;

The water glass is sodium water glass or potassium water glass with a modulus range of 3.1 to 3.4 and a Baume degree of Bé=38;

The solid filler is a mixture of mullite, refractory clay and quartz sand, the amount of mullite, refractory clay and quartz sand in the mixture is calculated by mass percentage, mullite: refractory clay: quartz sand is 50 -70%: 20-30%: 10-20%;

Wherein, the molecular formula of the mullite is 3Al ₂ O ₃ ·2Si O ₂ , the refractoriness is 1800°C, and the average bulk density is _1.911g /mL;

The refractory clay is soft clay with a molecular formula of Al ₂ O ₃ 2S _i O ₂ 2H ₂ O, wherein the content of Al ₂ O ₃ is <45%, the refractoriness is >1580°C, and the average bulk density is 1.199g/mL ;

The quartz sand is ordinary quartz sand of 20-200 meshes, with an average bulk density of 1.404g/mL;

The additive is a mixture of dispersant, penetrant and defoamer, the amount of dispersant, penetrant and defoamer in the mixture is calculated by mass percentage, dispersant: penetrant: defoamer is 30-40 %: 50-65%: 5-10%;

Wherein, the dispersing agent adopts the homopolymer or copolymer of acrylic acid and ester, the homopolymer or copolymer of methacrylic acid and ester or the combination of one or both, preferably acrylic acid-sodium styrene sulfonate- Hydroxyethyl methacrylate copolymer with a molecular weight of 18,000;

The penetrant uses high-temperature penetrant JFC-M, with polyoxyethylene ether compound as the main component;

The defoamer uses emulsified silicone oil with a surface tension of 20-21 dyn/cm.

The above-mentioned preparation method of a liquid grouting material for thermal repair of coke oven wall cracks, the steps are as follows:

(1) Preparation of solid filler

Add mullite, refractory clay and quartz sand to a mixer with a rotation speed of 50r/min and mix for 10 minutes until a solid filler is obtained uniformly;

(2) Preparation of additives

Add the dispersant, penetrant and defoamer to the mixer with a rotation speed of 150r/min and mix for 5 minutes until the additive is uniformly obtained;

(3) Add the additive obtained in step (2) to the water glass and stir until uniform at a rotational speed of 200r/min, then add the solid filler obtained in step (1) while stirring at a rotational speed of 300r/min. Finally, continue to stir until the mixture is uniform, and then the liquid grouting material for thermal repair of cracks in the coke oven wall is obtained.

The above-mentioned liquid grouting material for hot-state repair of coke oven wall cracks, solid fillers and additives are ready-to-use and ready-made. When in use, the obtained liquid grouting material for coke oven wall crack thermal repair Put it into the cracks of the coke oven wall at a temperature of 800-1200°C and let it stand until it solidifies.

Beneficial effects of the present invention

A liquid grouting material of the present invention for thermal repair of coke oven wall cracks has a flow time of 22.6-59.5s, so it has good fluidity and low viscosity, and can well solve the problems in the technical background. Encountered the problem of poor slurry fluidity in narrow gaps, which are used for furnace crack repair operations encountered in the coking industry. In addition, put together the liquid grouting material and the granular refractory bricks of the present invention for repairing cracks in the coke oven wall under the condition of 1100°C, and the compressive strength of the solid blocks obtained after sintering for 2 hours was verified by The measured value is 41.5-48.3MPa, which shows that the sintered product has good mechanical strength and bonding strength, and can meet the normal working conditions of the coke oven.

Further, a kind of liquid grouting material of the present invention is used for the thermal repair of coke oven wall crack, because water glass and solid filler have been adopted in the raw material, the mullite between the silanol in the water glass and the silanol and the solid filler In the process of dehydration condensation between silicon hydroxyl and aluminum hydroxyl, the system finally forms a three-dimensional body structure dominated by silicon, oxygen, silicon and silicon, oxygen, aluminum, so the sintered product has high strength and high temperature thermal stability Sexual characteristics.

Further, when the liquid grouting material used for thermal repair of coke oven wall cracks of the present invention is used, the high temperature of the coke oven body causes the growth of mullite crystals in the solid filler, and at the same time the degree of solidification of the system deepens, so this also The sintered solid block has good impermeability and high temperature resistance.

Further, a liquid grouting material for thermal repairing of coke oven wall cracks of the present invention is sintered and cooled in the range of 800-1000 °C, and the obtained The volume expansion of the solid block is less than 5%, so it will not cause secondary damage to the furnace body and will not affect the normal use of the coke oven.

Further, the liquid grouting material for thermal repair of cracks in the coke oven wall of the present invention has cheap and easy-to-obtain raw materials, no harm to the human body, short preparation period, and simple preparation method, so it has low production cost and is environmentally friendly during the production process. It is non-polluting and can be mass-produced.

Further, a kind of liquid grouting material of the present invention is used for the thermal state repair of coke oven furnace wall crack, and gelation time is short, and solidification sintering temperature is wide, so can effectively mend the crack of furnace body and improve project quality, and to our country coke oven High efficiency, low cost and long life operation are of great significance.

detailed description

The present invention will be further described below in conjunction with specific examples, and the following examples are only used to illustrate the present invention and not limit the protection scope of the present invention.

In each embodiment of the present invention:

The outflow time refers to the provisions of the national standard GB/T1723-93 on measuring fluid viscosity and is measured by Tu-4 viscometer;

The compressive strength refers to the national standard GB/T50448-2008 on the technical specifications for the application of cement-based grouting materials;

Slag resistance refers to the national standard GB/T8931-2007 on the test method of slag resistance of refractory materials, and the grouting materials are measured separately.

The specification of raw material used in each embodiment of the present invention and the information of manufacturer see the following table:

raw material name Specification Manufacturer Mullite The molecular formula is 3Al ₂ O ₃ 2S _i O ₂ , the refractoriness is 1800°C, and the average bulk density is 1.911g/mL Jingzhou Huaxin Mullite Co., Ltd. refractory clay The molecular formula is Al ₂ O ₃ 2SiO ₂ 2H ₂ O, the refractoriness is >1580°C, and the average bulk density is 1.199g/mL Weifang Weiye Refractory and Insulation Products Co., Ltd. Quartz sand 20-200 mesh, the average bulk density is 1.404g/mL Hebei Shengyi Mineral Products Co., Ltd. Dispersant Acrylic acid-sodium styrene sulfonate-hydroxyethyl methacrylate copolymer, the molecular weight is about 18000 Jiangsu Haian Petrochemical Plant penetrant High temperature penetrant JFC-M, the main component is polyoxyethylene ether compound Jiangsu Haian Petrochemical Plant Defoamer Emulsified silicone oil, the surface tension is 20-21dyn/cm Zhonglian Fine Chemical Co., Ltd. water glass Sodium water glass or potassium water glass, the modulus range is 3.1~3.4, Baume degree °Bé=38 Hubei Xingyinhe Chemical Co., Ltd.

Example 1

A liquid grouting material used for thermal repair of coke oven wall cracks, calculated by parts by mass, its raw material composition and content are as follows:

100 parts of water glass;

100 parts of solid filler;

9 parts of additives;

The water glass is sodium water glass with a modulus range of 3.1 to 3.4 and a Baume degree of Bé=38;

The solid filler is a mixture of mullite, refractory clay and quartz sand, the amount of mullite, refractory clay and quartz sand in the mixture is calculated by mass percentage, mullite: refractory clay: quartz sand is 70 %: 20%: 10%;

Wherein, the molecular formula of the mullite is 3Al ₂ O ₃ ·2Si O ₂ , the refractoriness is 1800°C, and the average bulk density is _1.911g /mL;

The refractory clay is soft clay with a molecular formula of Al ₂ O ₃ 2SiO ₂ 2H ₂ O, wherein the content of Al ₂ O ₃ is <45%, the refractoriness is >1580°C, and the average bulk density is 1.199g/mL;

The quartz sand is ordinary quartz sand of 20-200 meshes, with an average bulk density of 1.404g/mL;

Described additive is the mixture that dispersant, penetrating agent and antifoaming agent are formed, and the consumption of dispersing agent, penetrating agent and antifoaming agent in this mixture is calculated by mass percentage, and dispersing agent: penetrating agent: antifoaming agent is 30%: 65%: 5%;

Wherein, the dispersant is acrylic acid-sodium styrene sulfonate-hydroxyethyl methacrylate copolymer with a molecular weight of 18000;

The penetrant is a high-temperature penetrant JFC-M, with polyoxyethylene ether compound as the main component;

The defoamer is emulsified silicone oil with a surface tension of 20-21 dyn/cm.

The above-mentioned preparation method of a liquid grouting material for thermal repair of coke oven wall cracks comprises the following steps:

(1) Preparation of solid filler

Add mullite, refractory clay and quartz sand to a mixer with a rotation speed of 50r/min and mix for 10 minutes until a solid filler is obtained uniformly;

(2) Preparation of additives

Add the dispersant, penetrant and defoamer to the mixer with a rotation speed of 150r/min and mix for 5 minutes until the additive is uniformly obtained;

(3) Calculated in parts by mass, add 9 parts of the additive obtained in step (2) to 100 parts of water glass, control the rotation speed to 200r/min and stir until uniform, then control the rotation speed to 300r/min while stirring Add 100 parts of the solid filler obtained in step (1), and continue to stir until the mixture is uniform after adding, and then obtain the liquid grouting material for thermal repair of cracks in the coke oven wall.

The above-mentioned liquid grouting material for hot-state repair of coke oven wall cracks, solid fillers and additives are ready-to-use and ready-made. When in use, the obtained liquid grouting material for coke oven wall crack thermal repair Put it into the cracks of the coke oven wall at a temperature of 800-1200°C and let it stand until it solidifies.

According to the national standard GB/T1723-93, the outflow time of the above-mentioned liquid grouting material used for hot repair of cracks in the coke oven wall was measured: the outflow time was 22.6s, which was ≦150s in line with the provisions of GB/T1723-93 , which shows that the liquid grouting material used for thermal repair of cracks in the coke oven wall of the present invention has low viscosity and good fluidity, and can be well injected into narrow cracks and completely filled with the grouting material.

According to the national standard GB/T50448-2008, the above-mentioned liquid grouting material for hot repair of coke oven wall cracks and granular refractory bricks are put together under the condition of 1100 ℃ and sintered for 2 hours. The compressive strength of the solid block was determined to be 41.5 MPa. Therefore it can be seen that the solid block obtained by sintering has good mechanical strength and cohesive strength, thus showing that the above-mentioned liquid grouting material for thermal repair of coke oven wall cracks can be compared with refractory materials such as refractory bricks. A good combination can fully adapt to the high temperature working environment of the coke oven and meet the normal working conditions of the coke oven.

According to the national standard GB/T8931-2007, the sintered solid block obtained above was measured and observed, and its main crystal phases are corundum and mullite, which shows that its slag resistance is good. The volume expansion of the solid block obtained after sintering is less than 5%, which will not cause secondary damage to the furnace body and will not affect the normal use of the coke oven.

Example 2

A liquid grouting material used for thermal repair of coke oven wall cracks, calculated by parts by mass, its raw material composition and content are as follows:

100 parts of water glass;

250 parts of solid filler;

16 parts of additives;

The water glass is sodium water glass with a modulus range of 3.1 to 3.4 and a Baume degree of Bé=38;

The solid filler is a mixture of mullite, refractory clay and quartz sand, the amount of mullite, refractory clay and quartz sand in the mixture is calculated by mass percentage, mullite: refractory clay: quartz sand is 50 %: 30%: 20%;

Wherein, the molecular formula of the mullite is 3Al ₂ O ₃ ·2Si O ₂ , the refractoriness is 1800°C, and the average bulk density is _1.911g /mL;

The refractory clay is soft clay with a molecular formula of Al ₂ O ₃ 2SiO ₂ 2H ₂ O, wherein the content of Al ₂ O ₃ is <45%, the refractoriness is >1580°C, and the average bulk density is 1.199g/mL;

The quartz sand is ordinary quartz sand of 20-200 meshes, with an average bulk density of 1.404g/mL;

Described additive is the mixture that dispersant, penetrating agent and antifoaming agent are formed, and the consumption of dispersing agent, penetrating agent and antifoaming agent in this mixture is calculated by mass percentage, and dispersing agent: penetrating agent: antifoaming agent is 40%: 50%: 10%;

Wherein, the dispersant is acrylic acid-sodium styrene sulfonate-hydroxyethyl methacrylate copolymer with a molecular weight of 18000;

The penetrant is a high-temperature penetrant JFC-M, with polyoxyethylene ether compound as the main component;

The defoamer is emulsified silicone oil with a surface tension of 20-21 dyn/cm.

The above-mentioned preparation method of a liquid grouting material for thermal repair of coke oven wall cracks comprises the following steps:

(1) Preparation of solid filler

Add mullite, refractory clay and quartz sand to a mixer with a rotation speed of 50r/min and mix for 10 minutes until a solid filler is obtained uniformly;

(2) Preparation of additives

Add the dispersant, penetrant and defoamer to the mixer with a rotation speed of 150r/min and mix for 5 minutes until the additive is uniformly obtained;

(3) Calculated in parts by mass, add 16 parts of the additive obtained in step (2) to 100 parts of water glass and stir until uniform at a rotational speed of 200r/min, then control the rotational speed at 300r/min while stirring Add 250 parts of the solid filler obtained in the step (1), and continue to stir until the mixture is uniform after adding, and then obtain a liquid grouting material for thermal repair of cracks in the coke oven wall.

The above-mentioned liquid grouting material for hot-state repair of coke oven wall cracks, solid fillers and additives are ready-to-use and ready-made. When in use, the obtained liquid grouting material for coke oven wall crack thermal repair Put it into the cracks of the coke oven wall at a temperature of 800-1200°C and let it stand until it solidifies.

According to the national standard GB/T1723-93, the outflow time of the above-mentioned liquid grouting material used for hot repair of cracks in the coke oven wall was measured: the outflow time was 31.3s, which was ≦150s in line with GB/T1723-93 , which shows that the liquid grouting material used for thermal repair of cracks in the coke oven wall of the present invention has low viscosity and good fluidity, and can be well injected into narrow cracks and completely filled with the grouting material.

According to the national standard GB/T50448-2008, the above-mentioned liquid grouting material for hot repair of coke oven wall cracks and granular refractory bricks are put together under the condition of 1100 ℃ and sintered for 2 hours. The compressive strength of the solid block was determined to be 41.5 MPa. Therefore it can be seen that the solid block obtained by sintering has good mechanical strength and cohesive strength, thus showing that the above-mentioned liquid grouting material for thermal repair of coke oven wall cracks can be compared with refractory materials such as refractory bricks. A good combination can fully adapt to the high temperature working environment of the coke oven and meet the normal working conditions of the coke oven.

According to the national standard GB/T8931-2007, the sintered solid block obtained above was measured and observed, and its main crystal phases are corundum and mullite, which shows that its slag resistance is good. The volume expansion of the solid block obtained after sintering is less than 5%, which will not cause secondary damage to the furnace body and will not affect the normal use of the coke oven.

Example 3

A liquid grouting material for thermal repair of coke oven wall cracks, calculated by parts by mass, its raw material composition and content are as follows:

100 parts of water glass;

180 parts of solid filler;

13 parts of additives;

The water glass is sodium water glass with a modulus range of 3.1 to 3.4 and a Baume degree of Bé=38;

The solid filler is a mixture of mullite, refractory clay and quartz sand, the amount of mullite, refractory clay and quartz sand in the mixture is calculated by mass percentage, mullite: refractory clay: quartz sand is 60 %: 25%: 15%;

Wherein, the molecular formula of the mullite is 3Al ₂ O ₃ ·2Si O ₂ , the refractoriness is 1800°C, and the average bulk density is _1.911g /mL;

The refractory clay is soft clay with a molecular formula of Al ₂ O ₃ 2SiO ₂ 2H ₂ O, wherein the content of Al ₂ O ₃ is <45%, the refractoriness is >1580°C, and the average bulk density is 1.199g/mL;

The quartz sand is ordinary quartz sand of 20-200 meshes, with an average bulk density of 1.404g/mL;

Described additive is the mixture that dispersant, penetrating agent and antifoaming agent are formed, and the consumption of dispersing agent, penetrating agent and antifoaming agent in this mixture is calculated by mass percentage, and dispersing agent: penetrating agent: antifoaming agent is 35%: 55%: 10%;

Wherein, the dispersant is acrylic acid-sodium styrene sulfonate-hydroxyethyl methacrylate copolymer with a molecular weight of 18000;

The penetrant is a high-temperature penetrant JFC-M, with polyoxyethylene ether compound as the main component;

The defoamer is emulsified silicone oil with a surface tension of 20-21 dyn/cm.

The above-mentioned preparation method of a liquid grouting material for thermal repair of coke oven wall cracks comprises the following steps:

(1) Preparation of solid filler

Add mullite, refractory clay and quartz sand to a mixer with a rotation speed of 50r/min and mix for 10 minutes until a solid filler is obtained uniformly;

(2) Preparation of additives

Add the dispersant, penetrant and defoamer to the mixer with a rotation speed of 150r/min and mix for 5 minutes until the additive is uniformly obtained;

(3) Calculated in parts by mass, add 13 parts of the additive obtained in step (2) to 100 parts of water glass, control the rotation speed to 200r/min and stir until uniform, then control the rotation speed to 300r/min while stirring Add 180 parts of the solid filler obtained in the step (1), and continue to stir until the mixture is uniform after adding, and then obtain a liquid grouting material for thermal repair of cracks in the coke oven wall.

The above-mentioned liquid grouting material for hot-state repair of coke oven wall cracks, solid fillers and additives are ready-to-use and ready-made. When in use, the obtained liquid grouting material for coke oven wall crack thermal repair Put it into the cracks of the coke oven wall at a temperature of 800-1200°C and let it stand until it solidifies.

According to the national standard GB/T1723-93, the outflow time of the above-mentioned liquid grouting material for thermal repair of coke oven wall cracks was measured: the outflow time is 55.7s, which meets the requirements of GB/T1723-93≦150s , which shows that the liquid grouting material used for thermal repair of cracks in the coke oven wall of the present invention has low viscosity and good fluidity, and can be well injected into narrow cracks and completely filled with the grouting material.

According to the national standard GB/T50448-2008, the above-mentioned liquid grouting material for hot repair of coke oven wall cracks and granular refractory bricks are put together under the condition of 1100 ℃ and sintered for 2 hours. The compressive strength of the solid block was determined to be 41.5 MPa. Therefore it can be seen that the solid block obtained by sintering has good mechanical strength and cohesive strength, thus showing that the above-mentioned liquid grouting material for thermal repair of coke oven wall cracks can be compared with refractory materials such as refractory bricks. A good combination can fully adapt to the high temperature working environment of the coke oven and meet the normal working conditions of the coke oven.

According to the national standard GB/T8931-2007, the sintered solid block obtained above was measured and observed, and its main crystal phases are corundum and mullite, which shows that its slag resistance is good. The volume expansion of the solid block obtained after sintering is less than 5%, which will not cause secondary damage to the furnace body and will not affect the normal use of the coke oven.

In summary, a kind of liquid grouting material used for thermal repair of coke oven wall cracks provided by the present invention has an outflow time of 22.6-59.5s, thus showing that the present invention is used for coke oven wall crack thermal repair. The state-repaired liquid grouting material has good fluidity and low viscosity, which can well solve the problem of poor fluidity of slurry in narrow gaps encountered in the technical background, and it can be used in the coking industry. Furnace crack repair work. In addition, the liquid grouting material and granular refractory bricks of the present invention for hot repair of coke oven wall cracks are placed together under the condition of 1100 ° C, and the compressive strength of the solid block obtained after sintering for 2 hours is determined. It is 41.5-48.3MPa, which shows that the liquid grouting material used for coke oven wall crack thermal repair of the present invention and the solid block obtained after refractory brick sintering have good mechanical strength and cohesive strength, so It can meet the normal coke oven working conditions without affecting industrial production.

The foregoing is only an example of the embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, some improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and Modifications should also be regarded as the scope of protection of the present invention.

Claims (10)

1. A liquid grouting material for thermal repair of coke oven wall cracks, characterized in that, calculated by parts by mass, its raw material composition and content are as follows: 100 parts of water glass; 100-250 parts of solid filler; 9 to 16 parts of additives; The water glass is sodium water glass or potassium water glass with a modulus range of 3.1 to 3.4 and a Baume degree of Bé=38; The solid filler is a mixture of mullite, refractory clay and quartz sand, the amount of mullite, refractory clay and quartz sand in the mixture is calculated by mass percentage, mullite: refractory clay: quartz sand is 50 -70%: 20-30%: 10-20%; Wherein, the molecular formula of the mullite is 3Al ₂ O ₃ ·2Si O ₂ , the refractoriness is 1800°C, and the average bulk density is _1.911g /mL; The refractory clay is soft clay with a molecular formula of Al ₂ O ₃ 2S _i O ₂ 2H ₂ O, wherein the content of Al ₂ O ₃ is <45%, the refractoriness is >1580°C, and the average bulk density is 1.199g/mL ; The quartz sand is ordinary quartz sand of 20-200 meshes, with an average bulk density of 1.404g/mL; The additive is a mixture of dispersant, penetrant and defoamer, the amount of dispersant, penetrant and defoamer in the mixture is calculated by mass percentage, dispersant: penetrant: defoamer is 30-40 %: 50-65%: 5-10%; Wherein, the dispersant is one or a combination of homopolymers or copolymers of acrylic acid and esters, homopolymers or copolymers of methacrylic acid and esters; The penetrant is a high-temperature penetrant JFC-M, with polyoxyethylene ether compound as the main component; The defoamer is emulsified silicone oil with a surface tension of 20-21 dyn/cm. 2. a kind of liquid grouting material that is used for thermal repair of coke oven wall crack as claimed in claim 1, is characterized in that: The water glass is sodium water glass with a modulus range of 3.1 to 3.4 and a Baume degree of Bé=38; The dispersant is acrylic acid-sodium styrene sulfonate-hydroxyethyl methacrylate copolymer. 3. A kind of liquid grouting material that is used for thermal repair of coke oven wall crack as claimed in claim 2, is characterized in that, described acrylic acid-sodium styrene sulfonate-hydroxyethyl methacrylate copolymer, Its molecular weight is 18000. 4. A kind of liquid grouting material that is used for thermal repair of coke oven wall crack as claimed in claim 3, is characterized in that, calculated by mass parts, its raw material composition and content are as follows: 100 parts of water glass; 100-180 parts of solid filler; 9-13 parts of additives; The solid filler is a mixture of mullite, refractory clay and quartz sand, the amount of mullite, refractory clay and quartz sand in the mixture is calculated by mass percentage, mullite: refractory clay: quartz sand is 60 -70%: 20-25%: 10-15%; The additive is a mixture of dispersant, penetrant and defoamer, the amount of dispersant, penetrant and defoamer in the mixture is calculated by mass percentage, dispersant: penetrant: defoamer is 30-35 %: 55-65%: 5-10%. 5. a kind of liquid grouting material that is used for thermal state repair of coke oven wall crack as claimed in claim 4 is characterized in that, calculated by mass parts, its raw material composition and content are as follows: 100 parts of water glass; 100 parts of solid filler; 9 parts of additives; The solid filler is a mixture of mullite, refractory clay and quartz sand, the amount of mullite, refractory clay and quartz sand in the mixture is calculated by mass percentage, mullite: refractory clay: quartz sand is 70 %: 20%: 10%; Described additive is the mixture that dispersant, penetrating agent and antifoaming agent are formed, and the consumption of dispersing agent, penetrating agent and antifoaming agent in this mixture is calculated by mass percentage, and dispersing agent: penetrating agent: antifoaming agent is 30%: 65%: 5%. 6. A kind of liquid grouting material that is used for thermal repair of coke oven wall crack as claimed in claim 4, is characterized in that, calculated by mass parts, its raw material composition and content are as follows: 100 parts of water glass; 180 parts of solid filler; 13 parts of additives; The solid filler is a mixture of mullite, refractory clay and quartz sand, the amount of mullite, refractory clay and quartz sand in the mixture is calculated by mass percentage, mullite: refractory clay: quartz sand is 60 %: 25%: 15%; Described additive is the mixture that dispersant, penetrating agent and antifoaming agent are formed, and the consumption of dispersing agent, penetrating agent and antifoaming agent in this mixture is calculated by mass percentage, and dispersing agent: penetrating agent: antifoaming agent is 35%: 55%: 10%. 7. A kind of liquid grouting material that is used for thermal repair of coke oven wall crack as claimed in claim 3, is characterized in that, calculated by mass parts, its raw material composition and content are as follows: 100 parts of water glass; 180-250 parts of solid filler; 13-16 parts of additives; The solid filler is a mixture of mullite, refractory clay and quartz sand, the amount of mullite, refractory clay and quartz sand in the mixture is calculated by mass percentage, mullite: refractory clay: quartz sand is 50 -60%: 25-30%: 15-20%; The additive is a mixture of dispersant, penetrant and defoamer, the amount of dispersant, penetrant and defoamer in the mixture is calculated by mass percentage, dispersant: penetrant: defoamer is 35-40 %: 50-55%: 10%. 8. a kind of liquid grouting material that is used for thermal state repair of coke oven wall crack as claimed in claim 7 is characterized in that, calculated by mass parts, its raw material composition and content are as follows: 100 parts of water glass; 250 parts of solid filler; 16 parts of additives; The solid filler is a mixture of mullite, refractory clay and quartz sand, the amount of mullite, refractory clay and quartz sand in the mixture is calculated by mass percentage, mullite: refractory clay: quartz sand is 50 %: 30%: 20%; Described additive is the mixture that dispersant, penetrating agent and antifoaming agent are formed, and the consumption of dispersing agent, penetrating agent and antifoaming agent in this mixture is calculated by mass percentage, and dispersing agent: penetrating agent: antifoaming agent is 40%: 50%: 10%. 9. a kind of preparation method that is used for the liquid grouting material of coke oven oven wall crack thermal state repair as described in any claim of claim 1-8, step is as follows: (1) Preparation of solid filler Add mullite, refractory clay and quartz sand to a mixer with a rotation speed of 50r/min and mix for 10 minutes until a solid filler is obtained uniformly; (2) Preparation of additives Add the dispersant, penetrant and defoamer to the mixer with a rotation speed of 150r/min and mix for 5 minutes until the additive is uniformly obtained; (3) Add the additive obtained in step (2) to the water glass and stir until uniform at a rotational speed of 200r/min, then add the solid filler obtained in step (1) while stirring at a rotational speed of 300r/min. Finally, continue to stir until the mixture is uniform, and then the liquid grouting material for thermal repair of cracks in the coke oven wall is obtained. 10. A method for using a liquid grouting material for thermal repair of coke oven wall cracks as claimed in any one of claims 1-8, characterized in that solid fillers and additives are all ready-to-use and ready-made. When the additive is added to the water glass, the speed is controlled to be 200r/min and stirred until uniform, and then the solid filler is added while stirring at a speed of 300r/min. The liquid grouting material for thermal repair of cracks in the furnace wall is poured into the cracks in the furnace wall of the coke oven at a temperature of 800-1200°C, and then left to stand until it solidifies.