CN115925430B - Wear-resistant plastic ramming mass and application thereof - Google Patents
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- 239000002994 raw material Substances 0.000 claims abstract description 12
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 10
- 239000011159 matrix material Substances 0.000 claims abstract description 6
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims abstract description 3
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims abstract 2
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims abstract 2
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims abstract 2
- 239000000843 powder Substances 0.000 claims description 51
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 42
- 239000002245 particle Substances 0.000 claims description 41
- 229960000892 attapulgite Drugs 0.000 claims description 20
- 239000010431 corundum Substances 0.000 claims description 20
- 229910052593 corundum Inorganic materials 0.000 claims description 20
- 229910052625 palygorskite Inorganic materials 0.000 claims description 20
- 238000010248 power generation Methods 0.000 claims description 17
- 239000004927 clay Substances 0.000 claims description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 14
- 238000005299 abrasion Methods 0.000 claims description 14
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 13
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 11
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 11
- 239000010453 quartz Substances 0.000 claims description 10
- 239000000377 silicon dioxide Substances 0.000 claims description 10
- 229910052710 silicon Inorganic materials 0.000 claims description 8
- 239000010439 graphite Substances 0.000 claims description 7
- 229910002804 graphite Inorganic materials 0.000 claims description 7
- 239000004576 sand Substances 0.000 claims description 7
- 239000013078 crystal Substances 0.000 claims description 6
- 239000010426 asphalt Substances 0.000 claims description 5
- 239000005543 nano-size silicon particle Substances 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 6
- 239000000126 substance Substances 0.000 abstract description 6
- 239000002253 acid Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 238000009413 insulation Methods 0.000 abstract description 2
- 230000010354 integration Effects 0.000 abstract description 2
- 238000004321 preservation Methods 0.000 abstract description 2
- 238000007493 shaping process Methods 0.000 abstract description 2
- 239000002918 waste heat Substances 0.000 description 16
- 235000012239 silicon dioxide Nutrition 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 8
- 238000009472 formulation Methods 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 239000004568 cement Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 230000003628 erosive effect Effects 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000006253 pitch coke Substances 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000008719 thickening Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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Abstract
The invention provides a wear-resistant plastic ramming mass and application thereof, wherein the wear-resistant plastic ramming mass comprises the following raw material components in parts by weight: 40 to 60 parts of ramming mass matrix, 25 to 35 parts of aluminum sulfate, 0.8 to 2 parts of expanding agent, 0.1 to 0.6 part of sodium hexametaphosphate and 15 to 25 parts of nano silica sol. The wear-resistant plastic ramming material is convenient to ramm and form, has excellent acid resistance, compressive strength and chemical stability, can reduce or prevent shrinkage generated in heating and use after forming, can be used at high temperature for a long time, has high refractoriness and extremely strong thermal stability; the plastic process is convenient for ramming, construction and shaping, the product is convenient for field construction, has high strength and wear resistance, and has good construction integration, certain heat preservation and heat insulation effects, thus improving the construction environment.
Description
Technical Field
The invention relates to the field of materials, in particular to a wear-resistant plastic ramming mass and application thereof.
Background
The low-temperature waste heat power generation is to recycle low-grade heat contained in medium-low-temperature waste flue gas, steam, hot water and the like discharged in the production process of industries such as steel, cement, petrochemical industry and the like to generate power, and is an efficient energy-saving technology for changing waste into valuables; the technology utilizes the waste heat without directly consuming energy, not only does not cause any damage and pollution to the environment, but also is helpful for reducing and reducing the pollution to the environment caused by the direct discharge of the waste heat into the air; most of low-temperature waste heat power generation utilizes a heat source with the temperature less than 150 ℃, and at the moment, the traditional power generation system taking water (steam) as a circulating working medium has low power generation efficiency due to low pressure of the generated steam, so that economic benefit cannot be generated; organic working media are mostly adopted as circulating working media in low-temperature waste heat power generation. Because the organic working medium can be gasified at a lower temperature to generate higher pressure so as to push the turbine (turbine) to apply work, the organic working medium circulating power generation system can generate power with a useful value at the flue gas temperature of about 200 ℃ and the water temperature of about 80 ℃.
The pure low-temperature waste heat power generation technology has important significance in the aspects of energy conservation and environmental protection, and can bring considerable economic benefit; the low-temperature waste heat power generation is widely applied to the traditional high-energy-consumption industries and fields of cement, glass, steel, chemical industry, coal and the like, and especially realizes the combination of 'fish and bear' in the aspects of energy conservation and environmental protection in the cement industry, cement enterprises at home and abroad are being transformed into energy-saving and environmental-protection enterprises, and the production cost of the cement enterprises can be obviously reduced by adopting the low-temperature waste heat power generation. The utilization rate of waste heat resources in China has a larger promotion space, the market prospect of the waste heat power generation industry is better, the cement industry and the metallurgical industry are required to realize comprehensive waste heat utilization for saving energy and protecting environment, and the pure low-temperature waste heat power generation project is built in a matched manner. However, the pipeline lining of the waste heat power generation system has short service life and low heat utilization rate due to scouring, corrosion and abrasion of materials and high-concentration dust-containing gas, and the abrasion-resistant plastic ramming material special for the pure low-temperature waste heat power generation technology at present has serious loss and lower strength, so that the pure low-temperature waste heat power generation for a longer time is difficult to meet.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, it is an object of the present invention to provide a wear resistant moldable ramming mass and use thereof for solving the problems of the prior art.
To achieve the above and other related objects, the present invention is achieved by the following technical means.
The invention provides a wear-resistant plastic ramming mass, which comprises the following raw material components in parts by weight:
preferably, the ramming mass base is 45-55 parts by weight.
Preferably, the aluminum sulfate is 26 to 31 parts by weight.
Preferably, the expanding agent is 1 to 2 parts by weight.
Preferably, the nano silica sol is 18-25 parts by weight.
Preferably, the abrasion resistant moldable ramming mass further comprises 1 to 2 parts by weight of soft clay.
Preferably, the ramming mass matrix comprises one or more of white corundum sand, corundum micropowder, alumina powder, thermally modified attapulgite powder, silica micropowder, quartz powder, silicon carbide, graphite clay and asphalt coke powder.
More preferably, the particle size of the white corundum sand is 1-8 mm.
More preferably, the corundum micropowder has a particle size of less than 2 μm. More preferably, al in the corundum micropowder 2 O 3 The content is more than or equal to 98.5 percent. More preferably, the amount of the corundum fine powder passing through a 325 mesh screen is 5 to 10wt%.
More preferably, the alumina powder has a particle size of less than 2 μm. More preferably, the alumina has a particle size of 1 to 1.2. Mu.m.
More preferably, al in the alumina powder 2 O 3 The content of Fe and Si is more than or equal to 98.5wt percent, and the total content of Fe and Si is less than or equal to 0.05wt percent. More preferably, fe in the alumina powder 2 O 3 ≤0.03wt％，SiO 2 ≤0.02wt％。
More preferably, the particle size of the thermally modified attapulgite powder is less than 2 μm. More preferably, the crystal length of the heat modified attapulgite powder is 1-5 μm, and the diameter is 20-70 nm. The heat modified attapulgite powder has a unique three-dimensional chain structure and a special needle-bar crystal structure, so that the attapulgite powder has unusual colloid and adsorption performance, and the attapulgite powder has excellent thickening property, stable chemical performance and strong adhesive force. More preferably, the thermally modified attapulgite powder is provided for a book.
More preferably, the particle size of the fine silica powder is less than 2 μm. More preferably, the particle diameter of the fine silica powder is 1.2 to 2. Mu.m. More preferably, in the silicon micropowder, siO 2 The content is more than or equal to 92 weight percent.
More preferably, the particle size of the quartz powder is 80 μm or less. More preferably, the particle size of the quartz powder is 75 to 80 μm. More preferably, siO in the quartz powder 2 The content is more than or equal to 99 weight percent.
More preferably, the silicon carbide has a particle size of less than 75 μm. More preferably, the silicon carbide is 97% silicon carbide.
More preferably, the particle size of the graphite clay is less than 75 μm.
More preferably, the pitch coke powder has a particle size of less than 75 μm.
More preferably, the ramming mass matrix comprises 28 to 35 parts of white corundum sand, 10 to 15 parts of corundum micro powder, 5 to 10 parts of alumina powder, 5 to 8 parts of thermally modified attapulgite powder, 2 to 5 parts of silica micro powder, 2 to 8 parts of quartz powder, 5 to 10 parts of silicon carbide, 3 to 10 parts of soil-like graphite and 3 to 6 parts of asphalt coke powder.
Preferably, the expansion agent is a UEA-concrete expansion agent.
Preferably, the particle size of the silicon dioxide particles in the nano silica sol is 10-20 nm. The nano silica sol is prepared by dispersing nano silicon dioxide particles in sodium hydroxide solution.
Preferably, the particle size of the soft clay is 400 to 500 mesh.
The invention also discloses a preparation method of the wear-resistant plastic ramming mass, which is characterized in that the raw material components are uniformly mixed.
The invention also discloses the application of the wear-resistant plastic ramming mass in preheating the pipeline lining of a power generation system.
The wear-resistant plastic ramming material is convenient to ramm and form, has excellent acid resistance, compressive strength and chemical stability, can reduce or prevent shrinkage generated in heating and use after forming, can be used at high temperature for a long time, has high refractoriness and extremely strong thermal stability; the plastic process is convenient for ramming, construction and shaping, the product is convenient for field construction, has high strength and wear resistance, and has good construction integration, certain heat preservation and heat insulation effects, thus improving the construction environment.
Detailed Description
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present invention, which is described by the following specific examples.
Before the embodiments of the invention are explained in further detail, it is to be understood that the invention is not limited in its scope to the particular embodiments described below; it is also to be understood that the terminology used in the examples of the invention is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the invention. The test methods in the following examples, in which specific conditions are not noted, are generally conducted under conventional conditions or under conditions recommended by the respective manufacturers.
Where numerical ranges are provided in the examples, it is understood that unless otherwise stated herein, both endpoints of each numerical range and any number between the two endpoints are significant both in the numerical range. 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. In addition to the specific methods, devices, materials used in the embodiments, any methods, devices, and materials of the prior art similar or equivalent to those described in the embodiments of the present invention may be used to practice the present invention according to the knowledge of one skilled in the art and the description of the present invention.
The following examples of the invention are provided:
the ramming mass matrix comprises 30 parts of white corundum sand, 15 parts of corundum micro powder, 8 parts of alumina powder, 5 parts of thermally modified attapulgite powder, 5 parts of silicon micro powder, 5 parts of quartz powder, 10 parts of silicon carbide, 10 parts of soil-like graphite and 5 parts of asphalt coke powder.
Specifically, the particle size of the white corundum sand is 1-8 mm;
specifically, the particle size of the corundum micropowder is smaller than 2 mu m, and Al in the corundum micropowder 2 O 3 The content is more than or equal to 98.5 percent, and the sieving amount of the corundum micropowder passing through a 325-mesh screen is 5 to 10 weight percent.
Specifically, the particle size of the alumina is 1-1.2 μm.
Specifically, al in the alumina powder 2 O 3 The content of Fe and Si is more than or equal to 98.5wt percent, the total content of Fe and Si is less than or equal to 0.05wt percent, and the Fe in the alumina powder 2 O 3 ≤0.03wt％，SiO 2 ≤0.02wt％。
Specifically, the particle size of the thermally modified attapulgite powder is smaller than 2 mu m, the crystal length of the thermally modified attapulgite powder is 1-5 mu m, and the diameter is 20-70 nm. The heat modified attapulgite powder has a unique three-dimensional chain structure and a special needle-bar crystal structure, so that the attapulgite powder has unusual colloid and adsorption performance, and the attapulgite powder has excellent thickening property, stable chemical performance and strong adhesive force. More specifically, the thermally modified attapulgite powder is provided for a book.
More specifically, the particle diameter of the fine silica powder is 1.2-2 [ mu ] m, and SiO in the fine silica powder 2 The content is more than or equal to 92 weight percent.
More specifically, the particle size of the quartz powder is 75-80 mu m, and SiO in the quartz powder 2 The content is more than or equal to 99 weight percent.
More specifically, the particle size of the silicon carbide is less than 75 μm, and the silicon carbide is 97% silicon carbide.
More specifically, the particle size of the graphite clay is less than 75 μm.
More specifically, the particle size of the pitch coke powder is less than 75 μm.
Specifically, the expanding agent is a UEA-concrete expanding agent. The UEA-concrete expanding agent is prepared by mixing and grinding high-quality calcium sulfoaluminate, calcium aluminate and other components; because of its expansibility, it absorbs a part of the available process water and enhances the workability of the object, and it can reduce or prevent shrinkage of the refractory material during heating and use after molding.
Specifically, the particle size of the silicon dioxide particles in the nano silica sol is 10-20 nm. The nano silica sol is prepared by dispersing nano silicon dioxide particles in sodium hydroxide solution. Specifically, the pH of the nano silica sol is 9-10.
Specifically, the particle size of the soft clay is 400-500 meshes. More specifically, the soft clay is a Guangxi white soft clay.
Example 1
The embodiment provides a specific wear-resistant plastic ramming mass, which comprises the following raw material components in parts by weight:
comparative example 1 differs from example 1 in that the raw material formulation does not contain nano silica sol and soft clay, and otherwise is the same as example 1.
Example 2
The embodiment provides a specific wear-resistant plastic ramming mass, which comprises the following raw material components in parts by weight:
comparative example 2 differs from example 2 in that the raw material formulation does not contain nano silica sol and soft clay, and otherwise is the same as example 2.
Example 3
The embodiment provides a specific wear-resistant plastic ramming mass, which comprises the following raw material components in parts by weight:
example 4 differs from example 3 in that 60 parts by weight of the ramming mass base was used in the original formulation, with the remainder being the same as in example 3.
Example 5 differs from example 3 in that no soft clay was used in the formulation, the other being the same as example 3. Comparative example 3 differs from example 3 in that the raw material formulation does not contain nano silica sol and soft clay, and otherwise is the same as example 3. Comparative example 4 differs from example 3 in that 40 parts by weight of the ramming mass base was used in the raw material formulation, the other being the same as in example 3.
Comparative example 5 differs from example 3 in that 35 parts by weight of the ramming mass base was used in the raw material formulation, the other being the same as in example 3.
Comparative example 6 differs from example 3 in that 10 parts by weight of nano-silica sol was used in the formulation, and the other is the same as example 3.
The ramming masses prepared according to examples 1, 2, 3, 4 and 5 and comparative examples 1 to 6 were each subjected to performance tests.
The abrasion loss test was referred to GB/T18301-2012 to test the room temperature abrasion resistance.
The test of refractoriness is described in GB/T7322-2017.
Slag resistance test referring to GB/T8931-2007, each ramming mass was made into a crucible, which was treated at 1450 ℃ for 3 hours after filling with slag, and the area% of the erosion was tested.
The compressive strength was measured by referring to GB/T5072-2008 after 3 hours of treatment at 1450 ℃.
The line change rate was measured after 3h treatment at 1450℃with the test reference GB/T5988-2007.
Sulfuric acid etch resistance test is referred to GB/T17401-2008. 250g of ramming mass is taken, a sample is prepared according to the method, the sample is put into sulfuric acid with the mass fraction of 20% at 80 ℃ to erode for 6 hours, then the mass loss is measured, and the erosion rate of the sulfuric acid is expressed as the percentage of the mass loss of the sample to the initial mass.
The test results were as follows:
as shown in the table, the wear-resistant plastic ramming mass prepared in the application can be used at high temperature for a long time, has high refractoriness and extremely strong thermal stability, is suitable for a pure low-temperature waste heat power generation technology, has high compressive strength at the high temperature of 1450 ℃, has a line change rate of more than-0.35 percent after burning, has small anti-slag crucible erosion area and has the abrasion loss of less than or equal to 6cm 3 The smaller the abrasion loss is, the better the abrasion resistance is, the high abrasion resistance A-level ramming mass level is achieved, the excellent acid resistance and chemical stability are achieved, and the service life of the ramming mass is obviously prolonged; in comparative examples 1 to 3, no nano silica sol or soft clay was added, resulting in a large increase in line change after high-temperature firing of the prepared ramming mass, and a decrease in abrasion resistance and high-temperature compressive strength; the slag erosion resistant area of the crucible becomes large.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (9)
1. The wear-resistant plastic ramming mass is characterized by comprising the following raw material components in parts by weight:
40-60 parts by weight of ramming mass matrix
25-35 parts by weight of aluminum sulfate
0.8-2 parts by weight of an expanding agent
Sodium hexametaphosphate 0.1-0.6 weight parts
15-25 parts of nano silica sol;
the ramming mass matrix comprises 28-35 parts of white corundum sand, 10-15 parts of corundum micropowder, 5-10 parts of alumina powder, 5-8 parts of thermally modified attapulgite powder, 2-5 parts of silica micropowder, 2-8 parts of quartz powder, 5-10 parts of silicon carbide, 3-10 parts of soil-like graphite and 3-6 parts of asphalt coke powder;
al in the corundum micropowder 2 O 3 The content is greater than or equal toAt 98.5%;
the particle size of the thermally modified attapulgite powder is smaller than 2 mu m, the crystal length of the thermally modified attapulgite powder is 1-5 mu m, the diameter is 20-70 nm, and the thermally modified attapulgite powder has a unique three-dimensional space chain structure and a special needle-bar crystal structure;
the expanding agent is a UEA-concrete expanding agent;
the wear-resistant plastic ramming mass also comprises 1-2 parts by weight of soft clay.
2. The wear resistant moldable ramming mass of claim 1, wherein the white corundum sand has a particle size of 1-8 mm.
3. The resistant, moldable ramming mass of claim 1, wherein the corundum micropowder has a particle size of less than 2 μm; and/or the sieving amount of the corundum micropowder passing through a 325-mesh screen is 5-10wt%.
4. The resistant, moldable ramming mass of claim 1, wherein the alumina powder has a particle size of less than 2 μm.
5. The resistant, moldable ramming mass of claim 1, wherein the alumina powder comprises Al 2 O 3 The content of Fe and Si is more than or equal to 98.5wt percent, and the total content of Fe and Si is less than or equal to 0.05wt percent; and/or the particle size of the thermally modified attapulgite powder is less than 2 μm.
6. The abrasion resistant moldable ramming mass of claim 1, wherein the particle size of the fine silica powder is less than 2 μm; and/or the particle size of the quartz powder is less than or equal to 80 mu m; and/or the silicon carbide has a particle size of less than 75 μm; and/or, the particle size of the soil-like graphite is less than 75 μm; and/or, the particle size of the asphalt coke powder is less than 75 μm.
7. The abrasion resistant moldable ramming mass of claim 1, wherein the soft clay has a particle size of 400-500 mesh.
8. The abrasion resistant moldable ramming mass of claim 1, wherein the silica particles in the nanosilicon sol have a particle size of 10 to 20nm.
9. Use of the abrasion resistant moldable ramming mass of any of claims 1 to 8 for preheating the lining of a pipeline of a power generation system.
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