CN115124367A - Acid-base corrosion resistant spray coating for cement kiln and preparation method thereof - Google Patents
Acid-base corrosion resistant spray coating for cement kiln and preparation method thereof Download PDFInfo
- Publication number
- CN115124367A CN115124367A CN202210854294.9A CN202210854294A CN115124367A CN 115124367 A CN115124367 A CN 115124367A CN 202210854294 A CN202210854294 A CN 202210854294A CN 115124367 A CN115124367 A CN 115124367A
- Authority
- CN
- China
- Prior art keywords
- powder
- acid
- spray coating
- corrosion resistant
- pore
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005507 spraying Methods 0.000 title claims abstract description 61
- 230000007797 corrosion Effects 0.000 title claims abstract description 41
- 238000005260 corrosion Methods 0.000 title claims abstract description 41
- 239000004568 cement Substances 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 122
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 36
- 239000002585 base Substances 0.000 claims abstract description 29
- 239000002253 acid Substances 0.000 claims abstract description 18
- 239000003513 alkali Substances 0.000 claims abstract description 18
- 238000003756 stirring Methods 0.000 claims abstract description 9
- 239000007921 spray Substances 0.000 claims description 48
- 239000003973 paint Substances 0.000 claims description 44
- 239000007767 bonding agent Substances 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 16
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims description 14
- 229910052863 mullite Inorganic materials 0.000 claims description 14
- -1 polyethylene Polymers 0.000 claims description 10
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 10
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 10
- 239000004698 Polyethylene Substances 0.000 claims description 9
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 9
- 239000004005 microsphere Substances 0.000 claims description 9
- 229920000573 polyethylene Polymers 0.000 claims description 9
- 229940037003 alum Drugs 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 8
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 8
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims 1
- 239000012615 aggregate Substances 0.000 abstract description 30
- 239000002994 raw material Substances 0.000 abstract description 15
- 239000007787 solid Substances 0.000 abstract description 10
- 239000011230 binding agent Substances 0.000 abstract description 8
- 239000011819 refractory material Substances 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 17
- 239000011148 porous material Substances 0.000 description 17
- 239000000463 material Substances 0.000 description 10
- 238000011056 performance test Methods 0.000 description 10
- 238000012360 testing method Methods 0.000 description 9
- 230000035939 shock Effects 0.000 description 8
- 238000001816 cooling Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910003465 moissanite Inorganic materials 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- CNLWCVNCHLKFHK-UHFFFAOYSA-N aluminum;lithium;dioxido(oxo)silane Chemical compound [Li+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O CNLWCVNCHLKFHK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001354 calcination Methods 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
- 238000005266 casting Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 229910052903 pyrophyllite Inorganic materials 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 229910052642 spodumene Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/0022—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof obtained by a chemical conversion or reaction other than those relating to the setting or hardening of cement-like material or to the formation of a sol or a gel, e.g. by carbonising or pyrolysing preformed cellular materials based on polymers, organo-metallic or organo-silicon precursors
- C04B38/0025—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof obtained by a chemical conversion or reaction other than those relating to the setting or hardening of cement-like material or to the formation of a sol or a gel, e.g. by carbonising or pyrolysing preformed cellular materials based on polymers, organo-metallic or organo-silicon precursors starting from inorganic materials only, e.g. metal foam; Lanxide type products
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/02—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding chemical blowing agents
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/06—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
- C04B38/063—Preparing or treating the raw materials individually or as batches
- C04B38/0635—Compounding ingredients
- C04B38/0645—Burnable, meltable, sublimable materials
- C04B38/067—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3427—Silicates other than clay, e.g. water glass
- C04B2235/3463—Alumino-silicates other than clay, e.g. mullite
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/38—Non-oxide ceramic constituents or additives
- C04B2235/3817—Carbides
- C04B2235/3826—Silicon carbides
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/54—Particle size related information
- C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
- C04B2235/5436—Particle size related information expressed by the size of the particles or aggregates thereof micrometer sized, i.e. from 1 to 100 micron
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/74—Physical characteristics
- C04B2235/77—Density
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9669—Resistance against chemicals, e.g. against molten glass or molten salts
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9669—Resistance against chemicals, e.g. against molten glass or molten salts
- C04B2235/9692—Acid, alkali or halogen resistance
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Ceramic Products (AREA)
Abstract
The invention belongs to the technical field of refractory materials, and particularly relates to an acid-base corrosion resistant spray coating for a cement kiln and a preparation method thereof. According to the invention, by adding the superfine powder and the pore-forming agent into the existing aggregate, powder and binding agent raw material system, the finally solidified spray coating has the comprehensive advantages of large solid density and relatively high aperture ratio, so that the spray coating is dense and not heavy, the sufficient acid and alkali corrosion resistance is ensured, the weight is not too large, and the normal use of the cement kiln is not influenced. In addition, the invention also provides a preparation method of the spray coating, which mainly comprises the steps of feeding, stirring and continuous stirring, and finally ensures that the components of the spray coating sprayed out from the front and back of the nozzle are relatively uniform all the time.
Description
Technical Field
The invention belongs to the technical field of refractory materials, and particularly relates to an acid-base corrosion resistant spray coating for a cement kiln and a preparation method thereof.
Background
The cement kiln is mainly used for calcining cement clinker, and various chemical raw materials, harmful materials, heavy metals and the like can enter the cement kiln under the requirement of cooperative disposal of industrial and urban wastes in the cement kiln. Therefore, the acid and alkali corrosion resistance is particularly important for the refractory material inside the cement kiln.
On the other hand, because some narrow parts and special-shaped parts of the cement kiln are difficult to mold and cast, the cement kiln adopts refractory spray coating instead of refractory casting materials, such as preheaters, kiln head covers, tertiary air ducts and the like.
Chinese invention patent with patent publication No. CN102815955A and publication No. 2012.12.12 discloses an anti-skinning spray paint for cement kilns, which comprises the following components: flint clay, SiC, Guangxi white mud, alpha-Al 2 O 3 Micro powder, high-aluminum fine powder, SiC and SiC fine powder, pure calcium aluminate cement, spodumene, pyrophyllite and polypropylene fiber.
The spray paint of the patent is excellent in the anti-skinning property, but is insufficient in the direction of acid and alkali corrosion resistance. When a large amount of acidic or alkaline industrial waste enters the cement kiln, the spray paint is cracked, broken and dropped in a relatively short time.
Therefore, in view of the above, there is a need for a novel refractory spray paint with outstanding resistance to acid and alkali corrosion.
Disclosure of Invention
The invention provides an acid-base corrosion resistant spray coating for a cement kiln, which can ensure that the finally solidified spray coating has the comprehensive advantages of large entity density and relatively high aperture ratio by adding superfine powder and a pore-forming agent in the existing aggregate, powder and binding agent raw material system, so that the spray coating is dense and not heavy, the sufficient acid-base corrosion resistant performance is ensured, the weight is not too large, and the normal use of the cement kiln is not influenced.
In addition, the invention also provides a preparation method of the spray coating, which mainly comprises the steps of feeding, stirring and continuous stirring, and finally ensures that the components of the spray coating sprayed out from the front and back of the nozzle are relatively uniform all the time.
The technical scheme adopted by the invention for solving the problems is as follows: the acid-base corrosion resistant spray coating for the cement kiln comprises aggregate, powder, a binding agent, ultrafine powder and a pore-forming agent, wherein the ultrafine powder comprises alumina ultrafine powder, silicon carbide ultrafine powder and mullite ultrafine powder, the particle size of the ultrafine powder is 12-35 mu m, and the pore-forming agent comprises polyethylene microspheres, alum and sodium bicarbonate.
In the present invention, the reason why the spray paint has relatively strong acid-base corrosion resistance is that: after the superfine powder is added, the density of a sprayed paint entity is greatly improved, so that the corrosion speed of acid and alkali materials on the sprayed paint entity can be greatly reduced.
But on the other hand, if not stated, the same volume of the spray would be heavier than a conventional spray. Therefore, the ultrafine powder and the pore-forming agent are used together, so that the solidified spray coating is dense and not heavy, and the acid and alkali corrosion resistance and the portability in use are both considered.
Finally, the particle size range of the superfine powder is also relatively fine within the whole particle size range defined by the superfine powder, so that the superfine powder can more fully fill the gaps between the aggregates and the powder.
The further preferred technical scheme is as follows: the true density of the spray coating is 2.2-2.4g/cm 3 The apparent density of the spray coating is 1.6-1.7g/cm 3 。
In the present invention, the above true density numberThe values refer to: e.g. 1.6 cm 3 The solid volume of the spray paint is exactly 1.0 cm except the closed pore volume and the open pore volume 3 The weight is 2.2-2.4 g.
And the apparent density values refer to: e.g. 1.3cm 3 Removing the open pore volume of the surface, the volume enclosed by the outer surface is exactly 1.0 cm 3 The weight is 1.6-1.7 g.
In the present invention, the final cured spray coating has a "dense but not heavy" structural feature. In other words, the spray paint block of the present invention is just a little heavier, and possibly even almost heavier, than the conventional spray paint block for the same volume, but the cut-off small solid mass of the spray paint block of the present invention is much heavier than the conventional spray paint block.
Finally, the spray coating can give consideration to acid and alkali corrosion resistance and light weight, and avoids the situation that the preheater, the tertiary air duct and the like of the cement kiln are crushed due to overlarge weight.
The further preferred technical scheme is as follows: the addition weight of the superfine powder accounts for 5.0-7.5% of the total weight of the aggregate, the powder and the superfine powder.
In the present invention, if the added weight of the ultrafine powder is too small, the acid-base corrosion resistance of the ultrafine powder is lowered, and if it is too large, the apparent density of the ultrafine powder is significantly increased, which is not considered to be a good consideration.
The further preferable technical scheme is that the superfine powder comprises the following components in parts by weight: 35-40% of alumina superfine powder, 25-28% of silicon carbide superfine powder and the balance of mullite superfine powder.
The further preferred technical scheme is as follows: the grain diameter of the mullite superfine powder is 12-15 mu m.
In the invention, the hardness of the alumina superfine powder is higher than that of the mullite superfine powder, and the latter can realize a more compact filling effect by properly reducing the particle size, so the alumina superfine powder and the mullite superfine powder can almost achieve the same effect in the aspect of resisting acid-base corrosion, wherein the former depends on higher hardness and corrosion difficulty, and the latter depends on higher compactness and acid-base material difficulty entering degree.
The further preferable technical scheme is that the pore-forming agent comprises the following components in parts by weight: 75-78% of polyethylene microspheres, 10-12% of alum and the balance of sodium bicarbonate.
The further preferred technical scheme is as follows: the adding weight of the pore-forming agent accounts for 2-4% of the total weight of the aggregate, the powder and the ultramicro powder.
In the invention, the polyethylene microspheres deform and shrink rapidly after being heated to form closed pores for reducing weight, and the alum and the sodium bicarbonate are rapidly exhausted after being heated to form open pores and closed pores for reducing weight, so that the spray coating can be 'dense and not heavy'.
However, open pores are hardly useful per se against acid-base corrosion, but the thermal shock resistance of the spray coating can be suitably improved, so that the selection of "pore shape" requires mainly closed pores and secondarily open pores, which is why the polyethylene microspheres account for 75-78%.
A preparation method of an acid-base corrosion resistant spray coating for a cement kiln sequentially comprises the following steps:
s1, adding aggregate, powder, a bonding agent, superfine powder, a pore-forming agent and water into a stirrer;
and S2, starting the stirrer at the rotating speed of 60-120r/min, and stirring for 10-12min to obtain the final spray coating to be pumped.
The further preferred technical scheme is as follows: in S1, the weight of water accounts for 5-9% of the total weight of the aggregate, the powder, the bonding agent, the superfine powder and the pore-forming agent.
The further preferred technical scheme is as follows: and S2, when the spray paint is pumped, the rotating speed of the stirrer is 15-45 r/min.
In the invention, if the spraying material is not continuously stirred during pumping spraying, the ultrafine powder and the pore-forming agent are relatively unevenly distributed in the spraying material, so that after the spraying material is solidified, the early spraying part has relatively more pores, which is not beneficial to improving the acid-base corrosion resistance.
The present invention has the following advantages.
Firstly, the spray coating is dense but not heavy after being cured, takes the acid and alkali corrosion resistance and relatively light requirements into consideration, and ensures that the spray coating has relatively high practical value.
Secondly, the solid part of the spray coating enables the ultrafine powder to fill the gap between the aggregate and the powder, so that acid and alkali materials are difficult to enter, and the spray coating has high acid and alkali corrosion resistance.
Thirdly, the spray paint also comprises relatively more closed pores and relatively less open pores, wherein the closed pores are mainly used for reducing weight, and the open pores are mainly used for improving thermal shock resistance, namely the pore-forming agent has the two functions.
Fourthly, the acid and alkali corrosion resistance of the spray coating can be obviously improved only by adding a relatively small amount of the superfine powder and the pore-forming agent, which has higher economic value.
Fifthly, in the process of the preparation method of the spray coating, the raw materials of the spray coating are firstly quickly stirred for a short time and then continuously stirred for a long time, so that the raw materials of the spray coating are uniformly distributed and then uniformly sprayed, and the final spray coating has enough acid-base corrosion resistance everywhere.
Drawings
FIG. 1 is a table showing the composition of raw materials of 3 examples and 3 comparative examples of the present invention by weight.
FIG. 2 is a table of the results of the average performance test of the spray paint obtained by sampling at least 10 samples of 3 examples and 3 comparative examples of the present invention.
Detailed Description
The following description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention.
Example 1
As shown in attached figures 1 and 2, the acid-base corrosion resistant spray coating for the cement kiln comprises raw materials of aggregate, powder, a bonding agent, ultrafine powder, a pore-forming agent and water. The first five types are solid raw materials, and the weight is 100%, wherein: 52% of aggregate, 28% of powder, 12% of bonding agent, 5% of superfine powder and 3% of pore-forming agent.
The superfine powder comprises the following components in parts by weight: 35% of alumina superfine powder, 25% of silicon carbide superfine powder and the balance of mullite superfine powder, wherein the particle size of the superfine powder is 12-22 mu m. Wherein the grain diameter of the mullite submicron powder is 12-15 mu m.
The pore-forming agent comprises the following components in parts by weight: 75% of polyethylene microspheres, 10% of alum and the balance of sodium bicarbonate.
The true density of the spray coating is 2.2g/cm 3 The apparent density of the spray paint is 1.7g/cm 3 。
The preparation method of the acid-base corrosion resistant spray coating for the cement kiln sequentially comprises the following steps:
s1, adding aggregate, powder, a bonding agent, superfine powder, a pore-forming agent and water into a stirrer;
and S2, starting the stirrer at a rotating speed of 70r/min, and stirring for 10min to obtain the final spray paint to be pumped.
In S1, the weight of water accounts for 5% of the total weight of the aggregate, the powder, the bonding agent, the superfine powder and the pore-forming agent.
In S2, the rotation speed of the stirrer is 20r/min when the spray paint is pumped.
Finally, the spray coating in this embodiment is subjected to a spray curing operation, and 10 sites are selected for performance testing, wherein the test items include: acid resistance (%), alkali resistance, and the number of times of water-cooling thermal shock resistance (times) after 1100 ℃ for 5 hours, and the final average performance test result is shown in figure 2.
Example 2
As shown in attached figures 1 and 2, the acid-base corrosion resistant spray coating for the cement kiln comprises raw materials of aggregate, powder, a bonding agent, ultrafine powder, a pore-forming agent and water. The first five types are solid raw materials, and the weight is 100%, wherein: 53% of aggregate, 27% of powder, 13% of bonding agent, 5% of ultrafine powder and 2% of pore-forming agent.
The superfine powder comprises the following components in parts by weight: 40% of alumina superfine powder, 25% of silicon carbide superfine powder and the balance of mullite superfine powder, wherein the particle size of the superfine powder is 12-25 mu m. Wherein the grain diameter of the mullite submicron powder is 12-15 mu m.
The pore-forming agent comprises the following components in parts by weight: 78% of polyethylene microspheres, 10% of alum and the balance of sodium bicarbonate.
The true density of the spray coating is 2.3g/cm 3 The apparent density of the spray paint is 1.6g/cm 3 。
The preparation method of the acid-base corrosion resistant spray coating for the cement kiln sequentially comprises the following steps:
s1, adding aggregate, powder, a bonding agent, superfine powder, a pore-forming agent and water into a stirrer;
and S2, starting the stirrer at the rotating speed of 80r/min, and stirring for 12min to obtain the final spray paint to be pumped.
In S1, the weight of water accounts for 8% of the total weight of the aggregate, the powder, the bonding agent, the superfine powder and the pore-forming agent.
In S2, the rotation speed of the stirrer is 40r/min when the spray paint is pumped.
Finally, the spray coating in this embodiment is subjected to a spray curing operation, and 10 sites are selected for performance testing, wherein the test items include: acid resistance (%), alkali resistance, and the number of times of water-cooling thermal shock resistance (times) after 1100 ℃ for 5 hours, and the final average performance test result is shown in figure 2.
Example 3
As shown in attached figures 1 and 2, the acid-base corrosion resistant spray coating for the cement kiln comprises raw materials of aggregate, powder, bonding agent, superfine powder, pore-forming agent and water. The first five types are solid raw materials, and the weight is 100%, wherein: 51% of aggregate, 25% of powder, 15% of bonding agent, 6% of ultrafine powder and 3% of pore-forming agent.
The superfine powder comprises the following components in parts by weight: 36% of alumina superfine powder, 28% of silicon carbide superfine powder and the balance of mullite superfine powder, wherein the particle size of the superfine powder is 12-30 mu m. Wherein the grain diameter of the mullite submicron powder is 12-15 mu m.
The pore-forming agent comprises the following components in parts by weight: 76% of polyethylene microspheres, 10% of alum and the balance of sodium bicarbonate.
The spray nozzleThe true density of the coating is 2.2g/cm 3 The apparent density of the spray paint is 1.6g/cm 3 。
The preparation method of the acid-base corrosion resistant spray coating for the cement kiln sequentially comprises the following steps:
s1, adding aggregate, powder, a bonding agent, superfine powder, a pore-forming agent and water into a stirrer;
and S2, starting the stirrer at a rotating speed of 100r/min, and stirring for 12min to obtain the final spray paint to be pumped.
In S1, the weight of water accounts for 5% of the total weight of the aggregate, the powder, the bonding agent, the superfine powder and the pore-forming agent.
In S2, the rotation speed of the stirrer is 15r/min when the spray paint is pumped.
Finally, the spray coating in this embodiment is subjected to a spray curing operation, and 10 sites are selected for performance testing, wherein the test items include: acid resistance (%), alkali resistance, and water-cooling thermal shock resistance times (times) after 1100 ℃ and 5h, and the final average performance test result is shown in figure 2.
Comparative example 1
As shown in FIGS. 1 and 2, the spray paint of the comparative example is different from the spray paint of example 1 only in the following 2 points.
The first and the second comparative examples of the spray coating material comprise aggregate, powder, binder, and water. The first three types are solid raw materials, and the weight is 100%, wherein: 54% of aggregate, 28% of powder and 18% of binding agent.
Secondly, in S1, the adding weight of water accounts for 5 percent of the total weight of the aggregate, the powder and the bonding agent.
In addition, the density of the spray paint of this comparative example was measured to obtain the data: true density 2.0g/cm 3 And an apparent density of 1.9g/cm 3 。
And finally, carrying out spraying and curing operation on the spray paint in the comparative example, and selecting 10 places for performance test, wherein the test items comprise: acid resistance (%), alkali resistance, and the number of times of water-cooling thermal shock resistance (times) after 1100 ℃ for 5 hours, and the final average performance test result is shown in figure 2.
Comparative example 2
As shown in fig. 1 and 2, the spray paint of the comparative example is different from the spray paint of example 2 only in the following 3 points.
The first and the second comparative examples of the spray coating material comprise aggregate, powder, binder, pore-forming agent and water. The first four types are solid raw materials, and the weight is calculated by 100%, wherein: 52% of aggregate, 29% of powder, 17% of bonding agent and 2% of pore-forming agent.
Secondly, in S1, the added weight of water accounts for 8% of the total weight of the aggregate, the powder, the bonding agent and the pore-forming agent.
Thirdly, there is no ultrafine powder, so there is no limitation on the pore former.
In addition, the density of the spray paint in the comparative example was measured, and the data were: true density 2.2g/cm 3 And an apparent density of 2.1g/cm 3 。
And finally, carrying out spraying and curing operation on the spray paint in the comparative example, and selecting 10 positions for performance test, wherein the test items comprise: acid resistance (%), alkali resistance, and the number of times of water-cooling thermal shock resistance (times) after 1100 ℃ for 5 hours, and the final average performance test result is shown in figure 2.
Comparative example 3
As shown in fig. 1 and 2, the spray paint of the comparative example is different from the spray paint of example 3 only in the following 3 points.
The first and the second comparative examples of the spray coating are prepared from aggregate, powder, binder, superfine powder and water. The first four types are solid raw materials, and the weight is calculated by 100%, wherein: 53% of aggregate, 28% of powder, 14% of binding agent and 5% of ultrafine powder.
Secondly, in S1, the adding weight of water accounts for 5% of the total weight of the aggregate, the powder, the bonding agent and the superfine powder.
Thirdly, there is no pore former, so there is no limitation on the ultrafine powder in relation thereto.
Also, for the comparative exampleThe density of the spray coating is detected, and the obtained data are as follows: true density 1.8g/cm 3 And an apparent density of 1.7g/cm 3 。
And finally, carrying out spraying and curing operation on the spray paint in the comparative example, and selecting 10 places for performance test, wherein the test items comprise: acid resistance (%), alkali resistance, and the number of times of water-cooling thermal shock resistance (times) after 1100 ℃ for 5 hours, and the final average performance test result is shown in figure 2.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various modifications can be made within the knowledge of those skilled in the art without departing from the gist of the present invention. These are non-inventive modifications, which are intended to be protected by patent laws within the scope of the claims appended hereto.
Claims (10)
1. The acid and alkali corrosion resistant spray coating for the cement kiln comprises aggregate, powder and a bonding agent, and is characterized in that: the composite material also comprises ultrafine powder and a pore-forming agent, wherein the ultrafine powder comprises alumina ultrafine powder, silicon carbide ultrafine powder and mullite ultrafine powder, the particle size of the ultrafine powder is 12-35 mu m, and the pore-forming agent comprises polyethylene microspheres, alum and sodium bicarbonate.
2. The acid-base corrosion resistant spray paint for cement kilns as claimed in claim 1, wherein: the true density of the spray coating is 2.2-2.4g/cm 3 The apparent density of the spray coating is 1.6-1.7g/cm 3 。
3. The acid-base corrosion resistant spray paint for cement kilns as claimed in claim 1, wherein: the addition weight of the superfine powder accounts for 5.0-7.5% of the total weight of the aggregate, the powder and the superfine powder.
4. The acid-base corrosion resistant spray coating for the cement kiln according to claim 1, characterized in that the ultrafine powder comprises the following components by weight: 35-40% of alumina superfine powder, 25-28% of silicon carbide superfine powder and the balance of mullite superfine powder.
5. The acid-base corrosion resistant spray paint for cement kilns as claimed in claim 1, wherein: the grain diameter of the mullite superfine powder is 12-15 mu m.
6. The acid-base corrosion resistant spray paint for the cement kiln according to claim 1, characterized in that the pore-forming agent comprises the following components by weight: 75-78% of polyethylene microspheres, 10-12% of alum and the balance of sodium bicarbonate.
7. The acid-base corrosion resistant spray paint for cement kilns as claimed in claim 1, wherein: the adding weight of the pore-forming agent accounts for 2-4% of the total weight of the aggregate, the powder and the ultramicro powder.
8. The method for preparing the acid-base corrosion resistant spray paint for the cement kiln according to claim 1, which is characterized by sequentially comprising the following steps:
s1, adding aggregate, powder, a bonding agent, superfine powder, a pore-forming agent and water into a stirrer;
and S2, starting the stirrer at the rotating speed of 60-120r/min, and stirring for 10-12min to obtain the final spray coating to be pumped.
9. The method for preparing the acid-base corrosion resistant spray paint for the cement kiln according to claim 8, wherein the method comprises the following steps: in S1, the weight of water accounts for 5-9% of the total weight of the aggregate, the powder, the bonding agent, the superfine powder and the pore-forming agent.
10. The method for preparing the acid-base corrosion resistant spray paint for the cement kiln according to claim 8, wherein the method comprises the following steps: and S2, when the spray paint is pumped, the rotating speed of the stirrer is 15-45 r/min.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202210854294.9A CN115124367A (en) | 2022-07-20 | 2022-07-20 | Acid-base corrosion resistant spray coating for cement kiln and preparation method thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202210854294.9A CN115124367A (en) | 2022-07-20 | 2022-07-20 | Acid-base corrosion resistant spray coating for cement kiln and preparation method thereof |
Publications (1)
Publication Number | Publication Date |
---|---|
CN115124367A true CN115124367A (en) | 2022-09-30 |
Family
ID=83383044
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202210854294.9A Pending CN115124367A (en) | 2022-07-20 | 2022-07-20 | Acid-base corrosion resistant spray coating for cement kiln and preparation method thereof |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN115124367A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116063088A (en) * | 2023-02-01 | 2023-05-05 | 江苏三恒高技术窑具有限公司 | Ceramic light anti-chalking corrosion-resistant brick and preparation method thereof |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0369098A1 (en) * | 1988-11-17 | 1990-05-23 | Hispano Quimica S.A. | Process for the preparation of a reinforced ceramic foam |
US5073525A (en) * | 1989-10-23 | 1991-12-17 | Quigley Company, Inc. | Lightweight tundish refractory composition |
JPH0624839A (en) * | 1992-07-10 | 1994-02-01 | Hitachi Zosen Corp | Zircon-based refractory |
JPH09157046A (en) * | 1995-12-01 | 1997-06-17 | Asahi Glass Co Ltd | Composition for spraying refractory and method for applying the refractory |
JP2005053778A (en) * | 2004-08-26 | 2005-03-03 | Asahi Glass Ceramics Co Ltd | Application method of wet spraying refractory |
CN102701763A (en) * | 2012-06-08 | 2012-10-03 | 安徽瑞泰新材料科技有限公司 | Low-aluminum sintered alumina-silica refractory material and preparation method thereof |
CN103796973A (en) * | 2011-09-20 | 2014-05-14 | 赢创罗姆有限公司 | Method for producing light ceramic materials |
JP2014169214A (en) * | 2013-03-05 | 2014-09-18 | Kurosaki Harima Corp | Refractory and refractory structure |
CN106631058A (en) * | 2016-11-28 | 2017-05-10 | 浙江锦诚新材料股份有限公司 | Phosphate wear-resistant paint and spraying method thereof |
CN108164255A (en) * | 2018-03-12 | 2018-06-15 | 武汉理工大学 | A kind of preparation method of high porosity alumina porous ceramic of holding one's breath |
CN108675805A (en) * | 2018-06-14 | 2018-10-19 | 玉和建设有限公司 | A kind of mixed binding fire-resistant abrasion-proof is moldable |
-
2022
- 2022-07-20 CN CN202210854294.9A patent/CN115124367A/en active Pending
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0369098A1 (en) * | 1988-11-17 | 1990-05-23 | Hispano Quimica S.A. | Process for the preparation of a reinforced ceramic foam |
US5073525A (en) * | 1989-10-23 | 1991-12-17 | Quigley Company, Inc. | Lightweight tundish refractory composition |
JPH0624839A (en) * | 1992-07-10 | 1994-02-01 | Hitachi Zosen Corp | Zircon-based refractory |
JPH09157046A (en) * | 1995-12-01 | 1997-06-17 | Asahi Glass Co Ltd | Composition for spraying refractory and method for applying the refractory |
JP2005053778A (en) * | 2004-08-26 | 2005-03-03 | Asahi Glass Ceramics Co Ltd | Application method of wet spraying refractory |
CN103796973A (en) * | 2011-09-20 | 2014-05-14 | 赢创罗姆有限公司 | Method for producing light ceramic materials |
CN102701763A (en) * | 2012-06-08 | 2012-10-03 | 安徽瑞泰新材料科技有限公司 | Low-aluminum sintered alumina-silica refractory material and preparation method thereof |
JP2014169214A (en) * | 2013-03-05 | 2014-09-18 | Kurosaki Harima Corp | Refractory and refractory structure |
CN106631058A (en) * | 2016-11-28 | 2017-05-10 | 浙江锦诚新材料股份有限公司 | Phosphate wear-resistant paint and spraying method thereof |
CN108164255A (en) * | 2018-03-12 | 2018-06-15 | 武汉理工大学 | A kind of preparation method of high porosity alumina porous ceramic of holding one's breath |
CN108675805A (en) * | 2018-06-14 | 2018-10-19 | 玉和建设有限公司 | A kind of mixed binding fire-resistant abrasion-proof is moldable |
Non-Patent Citations (2)
Title |
---|
牟善浩: "水泥窑三次风闸板用浇注料的制备与性能研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅰ辑》 * |
隋良志等: "《水泥工业耐火材料》", 31 July 2005, 中国建材工业出版社 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116063088A (en) * | 2023-02-01 | 2023-05-05 | 江苏三恒高技术窑具有限公司 | Ceramic light anti-chalking corrosion-resistant brick and preparation method thereof |
CN116063088B (en) * | 2023-02-01 | 2024-02-02 | 江苏三恒高技术窑具有限公司 | Ceramic light anti-chalking corrosion-resistant brick and preparation method thereof |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN1121907A (en) | Non-slumping, pumpable castable and method of applying the same | |
CN1077558C (en) | Refractory compsn. for producing compact castable and wet spraying method | |
JP5775112B2 (en) | Cast body, castable composition, and production method thereof | |
CN115124367A (en) | Acid-base corrosion resistant spray coating for cement kiln and preparation method thereof | |
US6165926A (en) | Castable refractory composition and methods of making refractory bodies | |
JP7174184B1 (en) | Monolithic refractory for dry spraying and dry spraying construction method using the same | |
JP2000203953A (en) | Castable refractory for trough of blast furnace | |
JP2965957B1 (en) | Amorphous refractory composition for wet spraying | |
RU2303583C2 (en) | Method of production on refractory items for lining the thermal units mainly in non-ferrous metallurgy | |
JP6454653B2 (en) | Portland cement-based quick set slurry and wet spraying method | |
JP4450423B2 (en) | Indeterminate refractories for casting construction | |
CN116143501B (en) | Mechanical pressing tundish hanging plate and preparation method thereof | |
AU742062B2 (en) | Castable refractory composition and methods of making refractory bodies | |
RU2153482C2 (en) | Method of manufacturing aluminosilicate and corundum refractory products | |
JP3128514B2 (en) | Thermosetting pouring material for gutter | |
JP3523807B2 (en) | Tundish lining structure | |
JP4456193B2 (en) | Refractory spraying method | |
JP3128432B2 (en) | Salt resistant refractory castable for municipal solid waste incinerator | |
JP6330829B2 (en) | Indefinite refractory | |
JP4575852B2 (en) | Construction method of irregular refractories | |
JP2000256071A (en) | Castable refractory for blast furnace trough | |
JP3014545B2 (en) | Irregular refractories for casting | |
JP2001048662A (en) | Method for spraying refractory and spraying material used for the same | |
JP2000086334A (en) | Brick for sliding nozzle apparatus | |
JPH07110780B2 (en) | Sintered fireproof material |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220930 |
|
RJ01 | Rejection of invention patent application after publication |