Thermal-state repairing material for torpedo ladle

Abstract

The invention discloses a hot-state repairing material for a torpedo ladle. The hot-state repairing material is prepared from the following raw materials in percentage by weight: 55 to 65 percent of reclaimed material, 20 to 30 percent of alumina powder, 8 to 12 percent of Guangxi white mud, 3 to 7 percent of silica powder, 0.1 to 0.5 percent of plasticizer, 0.1 to 0.5 percent of anti-rebound agent and 0.5 to 2 percent of fiber. The hot-state repairing material for the torpedo ladle has the advantages of high adhesion rate, good slag corrosion resistance, high high-temperature strength and long service life, the service life reaches 35 times or above, and the production cost is effectively reduced; and the thermal-state repairing material for the torpedo ladle is convenient to construct and suitable for industrial popularization and application.

Description

Technical Field

[0001] The invention belongs to the technical field of refractory materials for torpedo tanks, and in particular relates to a hot repair material for torpedo tanks. Background Art

[0002] The function of the torpedo tank is mainly to load and transport molten iron, and it is a key equipment connecting the iron plant and the steel mill. During repeated use, the bricks near the tank mouth are severely damaged due to the movement and erosion of the molten iron in the tank and when it is poured into the iron ladle. In order to ensure the safe operation of the torpedo tank, domestic torpedo tanks are usually maintained by cold excavation or cold repair. This maintenance method often requires the torpedo tank to be cooled to room temperature before maintenance, and then baked and put into use online, which not only causes energy waste, but also affects the turnover efficiency of the torpedo tank and the service life of the refractory material.

[0003] As a maintenance process, hot gunning of torpedo tanks has the characteristics of simple construction process, low cost, strong pertinence and high efficiency, and has gradually been applied to torpedo tanks abroad. At present, the hot repair materials of torpedo tanks have problems such as poor adhesion, corrosion resistance and short service life after repair, and cannot achieve good results after maintenance. Summary of the invention

[0004] The purpose of the present invention is to solve the above technical problems and provide a hot gunning material for torpedo tanks with high adhesion, corrosion resistance and long service life.

[0005] To achieve the above object, the present invention provides a hot repair material for a torpedo tank, characterized in that the hot repair material comprises the following raw materials by weight percentage:

[0006] 55-65% recycled material, 20-30% alumina powder, 8-12% Guangxi white mud, 3-7% silica powder, 0.1-0.5% plasticizer, 0.1-0.5% anti-rebound agent and 0.5-2% fiber.

[0007] Furthermore, the recycled material is one of aluminum silicon carbide composite material or iron channel composite material, wherein Al 2 O 3 The content of is 60-85%, the content of SiC is 8-10%, the content of CaO is 1-4%, and the content of Fe is 2 O 3 The content of is 1-1.5%, and the content of C is 5-10%.

[0008] Furthermore, the recycled materials are divided into two gradations according to the particle size: ≤3mm and >1mm, and ≤1mm and >0.088mm, with weight percentages of 60-70% and 30-40% respectively.

[0009] Furthermore, the Al in the alumina powder2 O 3 The content is 85-95%, and the particle size is ≤0.088mm.

[0010] Furthermore, the Al in the Guangxi white mud 2 O 3 The content is 28-40%, and the plasticity index is ≥26.

[0011] Furthermore, the SiO 2 The mass percentage is 92-99%.

[0012] Furthermore, the grade of the plasticizer is CMC.

[0013] Furthermore, the anti-rebound agent is a product of Wuhan Shanda Company, and the brand name is Anti-rebound Agent 2018.

[0014] Furthermore, the fibers include hemp fibers and steel fibers, and the weight ratio of the hemp fibers to the steel fibers is 1.5:1 to 3:1.

[0015] Furthermore, the length of the hemp fiber is 3 to 8 mm; the length of the steel fiber is 10 to 20 mm.

[0016] The hot repair material for torpedo tanks of the present invention contains 8-10% silicon carbide and 5-10% carbon in the recycled material, which can improve the anti-oxidation performance of the gunning material and the anti-slag erosion performance of the gunning material; the small amount of iron oxide of 1-1.5% contained in the recycled material can promote the sintering of the gunning material at high temperature and improve the high-temperature strength of the gunning material; the matrix uses alumina powder to improve the anti-erosion performance of the gunning material; the hemp fiber is selected because, on the one hand, the hemp fiber is an organic matter, and carbon residues are left after decomposition at high temperature, which forms a carbon network structure with the carbon in the recycled material, which can improve the high-temperature strength and anti-erosion performance of the product; on the other hand, the hemp fiber with a length of 3-8 mm and the steel fiber with a length of 10-20 mm are selected and used in combination, which can melt at high temperature to form an air channel, which is beneficial to the discharge of water in the gunning material and prevent the gunning material from cracking, and can also improve the strength of the repair material; the composite use of Guangxi white mud and plasticizer CMC can greatly increase the plasticity and water retention of the gunning material, improve the adhesion during construction, and facilitate construction.

[0017] The use of recycled materials and alumina powder in combination can ensure the high-temperature sintering strength and corrosion resistance of the gunning material, increase the service life of the hot gunning material, and reduce the production cost of the product, making it suitable for industrial production.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: the hot repair material for torpedo tanks of the present invention has the advantages of high adhesion rate, good resistance to slag erosion, high high-temperature strength and long service life, with a service life of more than 35 times, effectively reducing production costs; and the hot repair material for torpedo tanks of the present invention is easy to construct and suitable for industrial promotion and application. DETAILED DESCRIPTION

[0019] In order to better explain the present invention, the main contents of the present invention are further explained below in conjunction with specific embodiments, but the contents of the present invention are not limited to the following embodiments.

[0020] Example 1

[0021] A hot repair material for a torpedo tank is prepared by mixing the following raw materials by weight: 55% aluminum silicon carbide composite material, 30% alumina powder, 8% Guangxi white mud, 5% silicon micropowder, 0.2% plasticizer, 0.3% anti-rebound agent and 1.5% fiber.

[0022] Al in aluminum silicon carbide composites 2 O 3 The content of is 60-85%, the content of SiC is 8-10%, the content of CaO is 1-4%, and the content of Fe is 2 O 3 The content of is 1-1.5%, the content of C is 5-10%; the particle size of aluminum silicon carbide composite material is ≤3mm and >1mm, ≤1mm and >0.088mm, and the weight percentages are 70% and 30% respectively; Al in alumina powder 2 O 3 The content of Al in Guangxi white mud is 85-95%, and the particle size is ≤0.088mm; 2 O 3 The content of SiO in silicon powder is 28-40%, and the plasticity index is ≥26; 2 The mass percentage is 92-99%; the brand of the plasticizer is CMC, and the brand of the anti-rebound agent is anti-rebound agent 2018; the fiber is a mixture of hemp fiber and steel fiber in a weight ratio of 3:1, wherein the length of the hemp fiber is 3-8mm, and the length of the steel fiber is 10-20mm.

[0023] During preparation, the hot repair material of the torpedo tank is stirred and mixed, and when used, the semi-dry spraying technology is used to perform hot repair on the mouth area of ​​the torpedo tank. The hot repair material of the present invention has a service life of 38 times, which is about 13 times higher than that of other products.

[0024] Example 2

[0025] A hot gunning material for a torpedo tank is prepared by mixing the following raw materials by weight: 57% iron ditch composite material, 25% alumina powder, 12% Guangxi white mud, 4% silicon micropowder, 0.5% plasticizer, 0.5% anti-rebound agent and 1% fiber.

[0026] Al in aluminum silicon carbide composites 2 O 3 The content of is 60-85%, the content of SiC is 8-10%, the content of CaO is 1-4%, and the content of Fe is 2 O 3 The content of Al is 1-1.5%, the content of C is 5-10%; the particle size of aluminum silicon carbide composite material is ≤3mm and >1mm, ≤1mm and >0.088mm, and the weight percentages are 65% and 35% respectively; Al in alumina powder 2 O 3 The content of Al in Guangxi white mud is 85-95%, and the particle size is ≤0.088mm; 2 O 3 The content of SiO in silicon powder is 28-40%, and the plasticity index is ≥26; 2 The mass percentage is 92-99%; the brand of the plasticizer is CMC, and the brand of the anti-rebound agent is anti-rebound agent 2018; the fiber is a mixture of hemp fiber and steel fiber in a weight ratio of 2:1, wherein the length of the hemp fiber is 3-8mm, and the length of the steel fiber is 10-20mm.

[0027] During preparation, the hot repair material of the torpedo tank is stirred and mixed, and when used, the semi-dry spraying technology is used to perform hot repair on the mouth area of ​​the torpedo tank. The hot repair material of the present invention has a service life of 35 times, which is about 10 times higher than that of other products.

[0028] Example 3

[0029] A hot repair material for a torpedo tank is prepared by mixing the following raw materials by weight: 61% aluminum silicon carbide composite material, 22% alumina powder, 9% Guangxi white mud, 7% silicon micropowder, 0.0.3% plasticizer, 0.2% anti-rebound agent, and 0.5% fiber.

[0030] Al in aluminum silicon carbide composites 2 O 3 The content of is 60-85%, the content of SiC is 8-10%, the content of CaO is 1-4%, and the content of Fe is 2 O 3 The content of Al is 1-1.5%, the content of C is 5-10%; the particle size of aluminum silicon carbide composite material is ≤3mm and >1mm, ≤1mm and >0.088mm, and the weight percentages are 62% and 38% respectively; Al in alumina powder 2 O 3The content of Al in Guangxi white mud is 85-95%, and the particle size is ≤0.088mm; 2 O 3 The content of SiO in silicon powder is 28-40%, and the plasticity index is ≥26; 2 The mass percentage is 92-99%; the brand of the plasticizer is CMC, and the brand of the anti-rebound agent is anti-rebound agent 2018; the fiber is a mixture of hemp fiber and steel fiber in a weight ratio of 2:1, wherein the length of the hemp fiber is 3-8mm, and the length of the steel fiber is 10-20mm.

[0031] During preparation, the hot repair material of the torpedo tank is stirred and mixed, and when used, the semi-dry spraying technology is used to perform hot repair on the mouth area of ​​the torpedo tank. The hot repair material of the present invention has a service life of 40 times, which is about 15 times higher than that of other products.

[0032] Example 4

[0033] A hot repair material for a torpedo tank is prepared by mixing the following raw materials by weight: 65% iron ditch composite material, 20% alumina powder, 11% Guangxi white mud, 3% silicon micropowder, 0.1% plasticizer, 0.1% anti-rebound agent and 0.8% fiber.

[0034] Al in aluminum silicon carbide composites 2 O 3 The content of is 60-85%, the content of SiC is 8-10%, the content of CaO is 1-4%, and the content of Fe is 2 O 3 The content of Al is 1-1.5%, the content of C is 5-10%; the particle size of aluminum silicon carbide composite material is ≤3mm and >1mm, ≤1mm and >0.088mm, and the weight percentages are 60% and 40% respectively; Al in alumina powder 2 O 3 The content of Al in Guangxi white mud is 85-95%, and the particle size is ≤0.088mm; 2 O 3 The content of SiO in silicon powder is 28-40%, and the plasticity index is ≥26; 2 The mass percentage is 92-99%; the brand of the plasticizer is CMC, and the brand of the anti-rebound agent is anti-rebound agent 2018; the fiber is a mixture of hemp fiber and steel fiber in a weight ratio of 1.5:1, wherein the length of the hemp fiber is 3-8 mm, and the length of the steel fiber is 10-20 mm.

[0035] During preparation, the hot repair material of the torpedo tank is stirred and mixed, and when used, the semi-dry spraying technology is used to perform hot repair on the mouth area of ​​the torpedo tank. The hot repair material of the present invention has a service life of 36 times, which is about 11 times higher than that of other products.

Claims

1. A hot repair material for a torpedo tank, characterized in that: The hot repair material includes the following raw materials by weight percentage: 55-65% recycled material, 20-30% alumina powder, 8-12% Guangxi white mud, 3-7% silica powder, 0.1-0.5% plasticizer, 0.1-0.5% anti-rebound agent and 0.5-2% fiber.

2. The hot repair material for a torpedo tank according to claim 1, characterized in that: The recycled material is one of aluminum silicon carbide composite material or iron channel composite material, wherein the content of Al2O3 is 60-85%, the content of SiC is 8-10%, the content of CaO is 1-4%, the content of Fe2O3 is 1-1.5%, and the content of C is 5-10%.

3. The hot repair material for a torpedo tank according to claim 1 or 2, characterized in that: The recycled materials are divided into two gradations according to the particle size: ≤3mm and >1mm, and ≤1mm and >0.088mm, with weight percentages of 60-70% and 30-40% respectively.

4. The hot repair material for a torpedo tank according to claim 1, characterized in that: The content of Al2O3 in the alumina powder is 85-95%, and the particle size is ≤0.088mm.

5. The hot repair material for a torpedo tank according to claim 1, characterized in that: The content of Al2O3 in the Guangxi white mud is 28-40%, and the plasticity index is ≥26.

6. The hot repair material for a torpedo tank according to claim 1, characterized in that: The mass percentage of SiO2 in the silicon micropowder is 92-99%.

7. The hot repair material for a torpedo tank according to claim 1, characterized in that: The grade of the plasticizer is CMC.

8. The hot repair material for a torpedo tank according to claim 1, characterized in that: The anti-rebound agent is a product of Wuhan Shanda Company, and the brand name is Anti-rebound Agent 2018.

9. The hot repair material for a torpedo tank according to claim 1, characterized in that: The fibers include hemp fibers and steel fibers, and the weight ratio of the hemp fibers to the steel fibers is 1.5:1 to 3:

1.

10. The hot repair material for a torpedo tank according to claim 9, characterized in that: The length of the hemp fiber is 3 to 8 mm; the length of the steel fiber is 10 to 20 mm.