CN110526724A - A kind of needle coke inner liner of rotary kiln new high-tech material and preparation method thereof - Google Patents

A kind of needle coke inner liner of rotary kiln new high-tech material and preparation method thereof Download PDF

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CN110526724A
CN110526724A CN201910888996.7A CN201910888996A CN110526724A CN 110526724 A CN110526724 A CN 110526724A CN 201910888996 A CN201910888996 A CN 201910888996A CN 110526724 A CN110526724 A CN 110526724A
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parts
powder
ultramicro
rotary kiln
needle coke
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刘龙
邓海亮
邓海峰
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Gongyi Fuhua Refractory Co Ltd
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Gongyi Fuhua Refractory Co Ltd
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    • 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
    • C04B35/16—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 silicates other than clay
    • C04B35/18—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 silicates other than clay rich in aluminium oxide
    • C04B35/185—Mullite 3Al2O3-2SiO2
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
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    • 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
    • C04B2235/3418—Silicon oxide, silicic acids, or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
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    • 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
    • C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
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    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
    • C04B2235/447—Phosphates or phosphites, e.g. orthophosphate, hypophosphite
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
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    • C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
    • C04B2235/9615—Linear firing shrinkage

Abstract

The present invention relates to needle coke rotary kiln technologies, specifically provide a kind of needle coke inner liner of rotary kiln new high-tech material, including aggregate, matrix, Ultramicro-powder, admixture, the parts by weight of each component are as follows: 60-75 parts of aggregates, 15-25 parts of matrix, 4-10 parts of Ultramicro-powders, 1-5 parts of admixtures.Preparation method includes the following steps: (1) successively adding a certain amount of aggregate, fine materials, Ultramicro-powder into kneading equipment according to parts by weight, be uniformly mixed；(2) admixture is added into kneading equipment, is thoroughly mixed and uniformly gets product；(3) it detects；(4) it packs.Needle coke inner liner of rotary kiln obtained by the present invention shows the performances such as excellent high temperature resistant, wear-resistant, resistance to erosion, anti-erosion, anti-thermal shock with new high-tech material, overall structure is good, the service life is long, is suitable for the ideal material at a temperature of 1450 DEG C long-term -1550 DEG C of needle coke inner liner of rotary kiln.

Description

A kind of needle coke inner liner of rotary kiln new high-tech material and preparation method thereof
Technical field
The present invention relates to needle coke rotary kiln technologies, more particularly to a kind of needle coke inner liner of rotary kiln Gao Xincai Material and preparation method thereof.
Background technique
Needle coke is the raw material for preparing the high temperature carbon products such as ultra-high power graphite electrode, extraordinary carbon materials, carbon fiber, calcining It is one of important procedure of needle coke production, directly affects the quality of electrode product.Currently, the calciner one of domestic needle coke As be calcining suitable for petroleum coke, common are rotary kiln, pot type burner, revolution bed, in comparison, since rotary kiln has The advantages that structure is simple, construction cost is low, yield is big, easy to operate, automatic control level is high, is usually adopted as needle-shaped Burnt calcining production equipment.Kiln temperature is divided into preheating zone, burning zone, cooling zone when calcined by rotary kiln needle coke, wherein calcining The temperature of band can achieve 1500 DEG C, meanwhile, rotary kiln is a kind of rotating machinery, this just proposes the performance of the resistance to material of inner liner of rotary kiln Great challenge is gone out.Domestic You Liangjia needle coke enterprise is run 6 months due to the resistance to material of rotary kiln and is forced to the underproduction, Seriously constrain the production of needle coke enterprise.And it is poured the performance that new high-tech material used in resistance to material directly determines resistance to material, because This, needle coke inner liner of rotary kiln is urgently improved with new high-tech material.
Summary of the invention
The present invention provides a kind of needle coke inner liner of rotary kiln new high-tech materials and preparation method thereof, needle-shaped at present to improve The performance of new high-tech material required for resistance to material is poured in burnt rotary kiln.
The technical scheme adopted by the invention is that: a kind of needle coke inner liner of rotary kiln new high-tech material, including aggregate and base Matter, the new high-tech material further include Ultramicro-powder, admixture, the parts by weight of each component are as follows: 60-75 parts of aggregates, 15-25 parts of matrix, 4-10 parts of Ultramicro-powders, 1-5 parts of admixtures, wherein aggregate is electrofused mullite, and matrix is fine materials, and Ultramicro-powder includes activity SiO2Ultramicro-powder and α-Al2O3Ultramicro-powder, the fine materials are mullite fine powder.
Preferably, aggregate includes the electrofused mullite particle of different fineness, wherein the critical granularity of electrofused mullite particle For 10mm.
Preferably, in aggregate the electrofused mullite particle of each fineness parts by weight are as follows: the electricity of 15-25 parts of 5-10mm fineness Molten mullite, the electrofused mullite of 18-26 parts of 3-5mm fineness, 10-19 parts of 1-3mm electrofused mullite, 10-15 parts of 0-1mm Electrofused mullite.
Preferably, in aggregate the electrofused mullite particle of each fineness parts by weight are as follows: the electric smelting of 20 parts of 5-10mm fineness The electric smelting of mullite, the electrofused mullite of 23 parts of 3-5mm fineness, the electrofused mullite of 15 parts of 1-3mm, 12 parts of 0-1mm does not come Stone.
Preferably, the mesh number of the mullite fine powder is 320 mesh and 200 mesh, and the ratio of the two is 1:0.8-2.
Preferably, the parts by weight of the Ultramicro-powder are 6-8 parts, and wherein activity SiO2Ultramicro-powder and α-Al2O3Ultra micro The weight ratio of powder is 1:1, active SiO2SiO in Ultramicro-powder2Content is higher than 90% and activity SiO2The fineness of Ultramicro-powder is less than 10 μm；α-Al2O3Al in Ultramicro-powder203Content be higher than 99% and α-Al2O3The fineness of Ultramicro-powder is less than 2 μm.
Preferably, the admixture includes the additive and water-reducing agent that weight ratio is 1:1, and additive is calcium chlorate water Mud, water-reducing agent are sodium tripolyphosphate or paracyanogen amine condensation product.
Preferably, which includes the raw material of following parts by weight: 70 parts of electrofused mullites, 10 part of 200 purpose are not come Mullite fine powder, the 3.5 parts of activity SiO of stone fine powder, 10 part of 320 mesh2Ultramicro-powder, 3.5 parts of α-Al2O3Ultramicro-powder, 1.5 parts of chloric acid Calcium cement, 1.5 parts of sodium tripolyphosphates.
A kind of preparation method of needle coke inner liner of rotary kiln new high-tech material, comprising the following steps: (1) according to parts by weight according to It is secondary to add a certain amount of aggregate, fine materials, Ultramicro-powder into kneading equipment, it is uniformly mixed；(2) it adds and mixes into kneading equipment Mixture is thoroughly mixed and uniformly gets product；(3) it detects；(4) it packs.
Preferably, the detection method of the step (3) are as follows: finished product made from step (2) is added in mold, length is made Width and height dimensions are 160mm × 40mm × 40mm sample block, demould after standing 24 hours, are then placed on 110 within natural curing three days DEG C baking oven in dry 24 hours, be made sample, and the compressive resistance of test sample, bulk density, flexural strength, line change Rate.
Compared with the prior art, the present invention has the following advantages: needle coke calcination inner liner of rotary kiln prepared by the invention is used The raw material of new high-tech material are easy to get, production method is simple, prepared by product show excellent high temperature resistant, wear-resistant, resistance to punching The performances such as brush, anti-erosion, anti-thermal shock, overall structure is good, the service life is long, be suitable for needle coke inner liner of rotary kiln it is 1450 DEG C long-term- Ideal material at a temperature of 1550 DEG C.
Specific embodiment
With reference to embodiment, the specific embodiment of the present invention is further described.Following embodiment is only used for more Add and clearly demonstrate technical solution of the present invention, and not intended to limit the protection scope of the present invention.
Specific embodiments of the present invention are:
A kind of needle coke inner liner of rotary kiln new high-tech material, the raw material including following parts by weight: 60-75 parts of aggregates, 15-25 Part matrix, 4-10 parts of Ultramicro-powders, 1-5 parts of admixtures.
Wherein, aggregate is varigrained electrofused mullite.The synthetic method of mullite includes sintering process and electric smelting method, with The mullite of sintering process synthesis compares, and electrofused mullite crystal development is perfect, crystal grain is big, defect is few, and crystalline size is sintering Hundreds times of mullite, therefore the mechanical behavior under high temperature of electrofused mullite and corrosion resistance all want quite a lot of relatively.In addition, electric smelting is not Carrying out stone has the characteristics that thermal stability is good, flexural strength is big, refractoriness under load is high, hardness is big, high-temerature creep is small.Ideal bone Material grain composition should can reach closestpacking, to form skeleton, but since the grain shape of aggregate is irregular, very Hardly possible obtains ideal particles of aggregates gradation, therefore reasonable bulk density is to prepare a key technology of high-performance castable, According to particle closestpacking principle, by the repetition test in laboratory, it is determined that electric smelting when the gap minimum formed between particle The granularmetric composition of mullite, it may be assumed that the critical granularity of electrofused mullite is 10mm, and the weight ratio range of each fineness are as follows:: 15- The electrofused mullite of 25 parts of 5-10mm fineness, 18-26 parts of 3-5mm fineness electrofused mullite, 10-19 parts of 1-3mm electric smelting The electrofused mullite of mullite, 10-15 part 0-1mm.Preferably, in aggregate the electrofused mullite particle of each fineness parts by weight Are as follows: the electric smelting of electrofused mullite, 15 parts of 1-3mm of the electrofused mullite of 20 parts of 5-10mm fineness, 23 parts of 3-5mm fineness does not come The electrofused mullite of stone, 12 parts of 0-1mm.
Matrix is fine materials, specifically the mullite fine powder after levigate, the mesh number of levigate mullite fine powder are 320 mesh and 200 mesh, the ratio of the two are 1:0.8-2.
Ultramicro-powder includes activity SiO2Ultramicro-powder and α-Al2O3Ultramicro-powder, the weight ratio of the two are 1:1.Ultramicro-powder is big The solid particle aggregate of amount, active SiO2Ultramicro-powder dispersion performance is good, and particle is small, is easy to sintering and bulk effect under high temperature It is small, activity SiO at high temperature2Ultramicro-powder and α-Al2O3Ultramicro-powder generates corundum-mullite, can significantly improve the strong of castable Degree.Table 1, table 2 list active SiO respectively2Ultramicro-powder and α-Al2O3The physicochemical property of Ultramicro-powder, RO is present invention choosing in table 1 Take the active SiO of number 4 in table 12Ultramicro-powder, activity SiO2SiO in Ultramicro-powder2Content is higher than 90%, α-Al2O3In Ultramicro-powder Al203Content should be higher than that 99%, the α-Al of number 6 in table 2 can be chosen2O3Ultramicro-powder, selected 4 activity SiO of number2Ultra micro α-the Al of powder and number 62O3The partial size percentage of Ultramicro-powder is shown in Table 3.
1 activity Si0 of table2The physicochemical property of Ultramicro-powder
2 α-Al of table2O3The physicochemical property of Ultramicro-powder
The particle diameter distribution percentage of 3 two kinds of Ultramicro-powders of table
Particle size μm < 0.3 < 0.4 < 1.0 < 2.0 < 10.0
Active Si02 — 48.0 69.0 80.9 100
α-Al203Powder 56.6 — 96.5 100 —
The addition of Ultramicro-powder can significantly improve the performance of the refractory material obtained after new high-tech material casting, such as improve fire resisting The intensity of material improves mobility when being poured, and improves casting performance, improves heat-resisting quantity, the durability of refractory material.
Admixture includes the additive and water-reducing agent that weight ratio is 1:1, and additive is calcium chlorate cement, water-reducing agent three Polyphosphate sodium or paracyanogen amine condensation product, sodium tripolyphosphate or paracyanogen amine condensation product play the role of following: can change powder Physicochemical properties, the absorption such as solids to solution, solute；Play the role of interfacial activity；Change the electronic property in interface； The peptization of colloidal ion.Table 4, which is listed, to be obtained after adding many experiments that different water-reducing agent dosages influence castable Performance of the suitable water-reducing agent dosage and castable under the suitable water-reducing agent dosage.By table 4 it is found that subtracting being not added with When aqua, since the spontaneous reunion of Ultramicro-powder can not effectively fill gap, and Ultramicro-powder is unevenly distributed, and a large amount of water is wrapped up It in floccule body and is filled in hole, water consumption is caused to increase, bulk density is low after heat treatment, and the porosity is high, and intensity is low, together When be also unfavorable for being sintered；Quadrafos has certain dispersion water-reducing effect, can prevent the spontaneous of Ultramicro-powder to a certain extent Reunite, is allowed to more fully hereinafter be filled in hole, improves the utilization rate of water, that is, reduce water consumption, so the body of castable Product density improves, and porosity decline, compared with not adding and subtracting aqua, compressive resistance is improved after burning, and paracyanogen amine condensation product is Efficient organic water-reducing agent adds the dispersibility of castable and water-reducing effect after paracyanogen amine condensation product and significantly improves, and do not add and subtract The castable of aqua is compared, and bulk density also increases.
Influence of 4 water-reducing agent of table to castable performance
The present invention selects activity Si02Ultramicro-powder and α-Al203After Ultramicro-powder, with calcium chlorate cement mixing, castable it is normal Temperature and medium temperature intensity are improved with the increase of Ultramicro-powder amount, and bulk density increases, and the porosity reduces, and weight is added in test When the mixing Ultramicro-powder that ratio is 10%, the room temperature and medium temperature intensity of castable are maximum, but high-temperature behavior declines, and test determining mixed The optimal addn range for closing Ultramicro-powder is 6% -8%.
More preferably, which includes the raw material of following parts by weight: 70 parts of electrofused mullites, 10 part of 200 purpose are not come Mullite fine powder, the 3.5 parts of activity SiO of stone fine powder, 10 part of 320 mesh2Ultramicro-powder, 3.5 parts of α-Al2O3Ultramicro-powder, 1.5 parts of chloric acid Calcium cement, 1.5 parts of sodium tripolyphosphates.
A kind of preparation method of needle coke inner liner of rotary kiln new high-tech material, comprising the following steps: (1) according to parts by weight according to It is secondary to add a certain amount of aggregate, fine materials, Ultramicro-powder into kneading equipment, it is uniformly mixed；(2) it adds and mixes into kneading equipment Mixture is thoroughly mixed and uniformly gets product；(3) it detects；(4) it packs.
Detection method are as follows: finished product made from step (2) is added in mold, length, width and height are made having a size of 160mm × 40mm The sample block of × 40mm demoulds after standing 24 hours, and then natural curing is placed in 110 DEG C of baking oven and dries 24 hours for three days, Sample, and the compressive resistance of test sample, bulk density, flexural strength, Linear change rate is made.
Embodiment 1
A kind of needle coke inner liner of rotary kiln new high-tech material, the raw material including following parts by weight: 60 parts of aggregates, 25 parts of bases Matter, 4 parts of Ultramicro-powders, 5 parts of admixtures, wherein aggregate includes the electrofused mullite particle of different fineness, the electricity of each fineness in aggregate The parts by weight of molten mullite particle are as follows: the electric smelting of the electrofused mullite of 15 parts of 5-10mm fineness, 26 parts of 3-5mm fineness does not come Stone, the electrofused mullite of 10 parts of 1-3mm, 15 parts of 0-1mm electrofused mullite；Matrix includes the mullite of 320 mesh and 200 mesh Fine powder, the weight ratio of the two are 1:0.8.Ultramicro-powder includes the active SiO that weight ratio is 1:12Ultramicro-powder and α-Al2O3It is super Micro mist, active SiO2SiO in Ultramicro-powder2Content is 90.9% and activity SiO2The fineness of Ultramicro-powder is less than 10 μm；α-Al2O3Ultra micro Al in powder203Content be 99.43% and α-Al2O3The fineness of Ultramicro-powder is less than 2 μm.Admixture includes that weight ratio is 1:1 Additive and water-reducing agent, additive are calcium chlorate cement, and water-reducing agent is sodium tripolyphosphate or paracyanogen amine condensation product.
The preparation method of the needle coke inner liner of rotary kiln new high-tech material the following steps are included: (1) according to parts by weight successively A certain amount of aggregate, fine materials, Ultramicro-powder are added to being kneaded in equipment, is uniformly mixed；(2) it adds and blends into kneading equipment Agent is thoroughly mixed and uniformly gets product；(3) it detects；(4) it packs.The detection method of step (3) are as follows: step (2) are made Finished product be added in mold, length, width and height are made having a size of 160mm × 40mm × 40mm sample block, are demoulded after standing 24 hours, so Natural curing is placed in 110 DEG C of baking oven and dries 24 hours for three days afterwards, and sample, and the compressive resistance of test sample, body is made Product density, flexural strength, Linear change rate.
Embodiment 2
A kind of needle coke inner liner of rotary kiln new high-tech material, the raw material including following parts by weight: 75 parts of aggregates, 15 parts of bases Matter, 10 parts of Ultramicro-powders, 1 part of admixture, wherein aggregate includes the electrofused mullite particle of different fineness, each fineness in aggregate The parts by weight of electrofused mullite particle are as follows: the electric smelting of the electrofused mullite of 25 parts of 5-10mm fineness, 18 parts of 3-5mm fineness does not come Stone, the electrofused mullite of 19 parts of 1-3mm, 10 parts of 0-1mm electrofused mullite；Matrix includes the mullite of 320 mesh and 200 mesh Fine powder, the ratio of the two are 1:2.Ultramicro-powder includes the active SiO that weight ratio is 1:12Ultramicro-powder and α-Al2O3Ultramicro-powder, it is living Property SiO2SiO in Ultramicro-powder2Content is 90.9% and activity SiO2The fineness of Ultramicro-powder is less than 10 μm；α-Al2O3In Ultramicro-powder Al203Content be 99.43% and α-Al2O3The fineness of Ultramicro-powder is less than 2 μm.Admixture includes the addition that weight ratio is 1:1 Agent and water-reducing agent, additive are calcium chlorate cement, and water-reducing agent is sodium tripolyphosphate or paracyanogen amine condensation product.
The preparation method of the needle coke inner liner of rotary kiln new high-tech material the following steps are included: (1) according to parts by weight successively A certain amount of aggregate, fine materials, Ultramicro-powder are added to being kneaded in equipment, is uniformly mixed；(2) it adds and blends into kneading equipment Agent is thoroughly mixed and uniformly gets product；(3) it detects；(4) it packs.The detection method of step (3) are as follows: step (2) are made Finished product be added in mold, length, width and height are made having a size of 160mm × 40mm × 40mm sample block, are demoulded after standing 24 hours, so Natural curing is placed in 110 DEG C of baking oven and dries 24 hours for three days afterwards, and sample, and the compressive resistance of test sample, body is made Product density, flexural strength, Linear change rate.
Embodiment 3
A kind of needle coke inner liner of rotary kiln new high-tech material, the raw material including following parts by weight: 70 parts of electrofused mullites, 10 Mullite fine powder, the 3.5 parts of activity SiO of the mullite fine powder of part 200 mesh, 10 part of 320 mesh2Ultramicro-powder, 3.5 parts of α-Al2O3Ultra micro Powder, 1.5 parts of calcium chlorate cement, 1.5 parts of sodium tripolyphosphates.Wherein, active SiO2SiO in Ultramicro-powder2Content is 90.9% and activity SiO2The fineness of Ultramicro-powder is less than 10 μm；α-Al2O3Al in Ultramicro-powder203Content be 99.43% and α-Al2O3Ultramicro-powder it is thin Degree is less than 2 μm；Electrofused mullite includes different granularities, the parts by weight of the electrofused mullite particle of each fineness are as follows: 20 parts of 5- The electrofused mullite of 10mm fineness, the electrofused mullite of 23 parts of 3-5mm fineness, 15 parts of 1-3mm electrofused mullite, 12 parts of 0- The electrofused mullite of 1mm.
The preparation method of the needle coke inner liner of rotary kiln new high-tech material the following steps are included: (1) according to parts by weight successively To be kneaded added in equipment 70 parts of electrofused mullites, the mullite fine powder of 10 part of 200 mesh, 10 part of 320 mesh mullite fine powder, 3.5 parts of activity SiO2Ultramicro-powder, 3.5 parts of α-Al2O3Ultramicro-powder is uniformly mixed；(2) 1.5 parts of calcium chlorates are added into kneading equipment Cement, 1.5 parts of sodium tripolyphosphates, are thoroughly mixed and uniformly get product；(3) it detects；(4) it packs.The detection side of step (3) Method are as follows: finished product made from step (2) is added in mold, length, width and height are made having a size of 160mm × 40mm × 40mm sample block, it is quiet It is demoulded after setting 24 hours, then natural curing is placed in 110 DEG C of baking oven and dries 24 hours for three days, sample is made, and detect The compressive resistance of sample, bulk density, flexural strength, Linear change rate.
Embodiment 4
A kind of needle coke inner liner of rotary kiln new high-tech material, the raw material including following parts by weight: 65 parts of aggregates, 18 parts of bases Matter, 6 parts of Ultramicro-powders, 1-5 parts of admixtures, wherein aggregate includes the electrofused mullite particle of different fineness, 18 parts of 5-10mm fineness Electrofused mullite, the electrofused mullites of 20 parts of 3-5mm fineness, the electrofused mullite of 12 parts of 1-3mm, 12 parts of 0-1mm electricity Molten mullite；Matrix includes the mullite fine powder of 320 mesh and 200 mesh, and the ratio of the two is 1:1；Ultramicro-powder includes weight ratio For the active SiO of 1:12Ultramicro-powder and α-Al2O3Ultramicro-powder；Active SiO2SiO in Ultramicro-powder2Content is 90.9% and activity SiO2 The fineness of Ultramicro-powder is less than 10 μm；α-Al2O3Al in Ultramicro-powder203Content be 99.43% and α-Al2O3The fineness of Ultramicro-powder is small In 2 μm；Admixture includes the additive and water-reducing agent that weight ratio is 1:1, and additive is calcium chlorate cement, and water-reducing agent is trimerization Sodium phosphate or paracyanogen amine condensation product.
The preparation method of the needle coke inner liner of rotary kiln new high-tech material the following steps are included: (1) according to parts by weight successively A certain amount of aggregate, fine materials, Ultramicro-powder are added to being kneaded in equipment, is uniformly mixed；(2) it adds and blends into kneading equipment Agent is thoroughly mixed and uniformly gets product；(3) it detects；(4) it packs.The detection method of step (3) are as follows: step (2) are made Finished product be added in mold, length, width and height are made having a size of 160mm × 40mm × 40mm sample block, are demoulded after standing 24 hours, so Natural curing is placed in 110 DEG C of baking oven and dries 24 hours for three days afterwards, and sample, and the compressive resistance of test sample, body is made Product density, flexural strength, Linear change rate.
Embodiment 5
A kind of needle coke inner liner of rotary kiln new high-tech material, the raw material including following parts by weight: 72 parts of aggregates, 23 parts of bases Matter, 8 parts of Ultramicro-powders, 3 parts of admixtures.Wherein, aggregate includes the electrofused mullite particle of different fineness, 23 parts of 5-10mm fineness The electric smelting of electrofused mullite, the electrofused mullite of 25 parts of 3-5mm fineness, the electrofused mullite of 18 parts of 1-3mm, 14 parts of 0-1mm Mullite；Matrix includes the mullite fine powder of 320 mesh and 200 mesh, and the ratio of the two is 1:1.5；Ultramicro-powder includes weight ratio For the active SiO of 1:12Ultramicro-powder and α-Al2O3Ultramicro-powder；Active SiO2SiO in Ultramicro-powder2Content is 90.9% and activity SiO2 The fineness of Ultramicro-powder is less than 10 μm；α-Al2O3Al in Ultramicro-powder203Content be 99.43% and α-Al2O3The fineness of Ultramicro-powder is small In 2 μm；Admixture includes the additive and water-reducing agent that weight ratio is 1:1, and additive is calcium chlorate cement, and water-reducing agent is trimerization Sodium phosphate or paracyanogen amine condensation product.
The preparation method of the needle coke inner liner of rotary kiln new high-tech material the following steps are included: (1) according to parts by weight successively A certain amount of aggregate, fine materials, Ultramicro-powder are added to being kneaded in equipment, is uniformly mixed；(2) it adds and blends into kneading equipment Agent is thoroughly mixed and uniformly gets product；(3) it detects；(4) it packs.The detection method of step (3) are as follows: step (2) are made Finished product be added in mold, length, width and height are made having a size of 160mm × 40mm × 40mm sample block, are demoulded after standing 24 hours, so Natural curing is placed in 110 DEG C of baking oven and dries 24 hours for three days afterwards, and sample, and the compressive resistance of test sample, body is made Product density, flexural strength, Linear change rate.
Anshan open charcoal thermal energy new material Co., Ltd used needle coke inner liner of rotary kiln provided by the invention with high-new After material, the needle coke inner liner of rotary kiln of company is increased to 06 months 1 year use longevity by 5 months original service lifes Life, substantially prolongs the service life of needle coke inner liner of rotary kiln, reduces production cost.
Table 5 lists the detection data of the sample according to prepared by embodiment 3
The detection data of sample prepared by 5 embodiment 3 of table
According to table 5 it is found that the sample according to prepared by embodiment 3 show excellent compressive resistance, flexural strength and Linear change rate, specific excellent bulk density.
What has been described above is only a preferred embodiment of the present invention, it is noted that for those skilled in the art, Without depart from that overall concept of the invention, several changes and improvements can also be made, these also should be considered as of the invention Protection scope.

Claims (10)

1. a kind of needle coke inner liner of rotary kiln new high-tech material, including aggregate and matrix, it is characterised in that: the new high-tech material also wraps Include Ultramicro-powder, admixture, the parts by weight of each component are as follows: 60-75 parts of aggregates, 15-25 parts of matrix, 4-10 parts of Ultramicro-powders, 1-5 parts Admixture, wherein aggregate is electrofused mullite, and matrix is fine materials, and Ultramicro-powder includes activity SiO2Ultramicro-powder and α-Al2O3 Ultramicro-powder, the fine materials are mullite fine powder.
2. a kind of needle coke inner liner of rotary kiln new high-tech material according to claim 1, it is characterised in that: aggregate includes not With the electrofused mullite particle of fineness, wherein the critical granularity of electrofused mullite particle is 10mm.
3. a kind of needle coke inner liner of rotary kiln new high-tech material according to claim 2, it is characterised in that: each thin in aggregate The parts by weight of the electrofused mullite particle of degree are as follows: the electrofused mullite of 15-25 parts of 5-10mm fineness, 18-26 parts of 3-5mm fineness Electrofused mullite, the electrofused mullite of 10-19 parts of 1-3mm, 10-15 parts of 0-1mm electrofused mullite.
4. a kind of needle coke inner liner of rotary kiln new high-tech material according to claim 3, it is characterised in that: each thin in aggregate The parts by weight of the electrofused mullite particle of degree are as follows: the electric smelting of the electrofused mullite of 20 parts of 5-10mm fineness, 23 parts of 3-5mm fineness Mullite, the electrofused mullite of 15 parts of 1-3mm, 12 parts of 0-1mm electrofused mullite.
5. a kind of needle coke inner liner of rotary kiln new high-tech material according to claim 1, it is characterised in that: described does not come The mesh number of stone fine powder is 320 mesh and 200 mesh, and the ratio of the two is 1:0.8-2.
6. a kind of needle coke inner liner of rotary kiln new high-tech material according to claim 1, it is characterised in that: the ultra micro The parts by weight of powder are 6-8 parts, and wherein activity SiO2Ultramicro-powder and α-Al2O3The weight ratio of Ultramicro-powder is 1:1, activity SiO2SiO in Ultramicro-powder2Content is higher than 90% and activity SiO2The fineness of Ultramicro-powder is less than 10 μm；α-Al2O3Al in Ultramicro-powder203 Content be higher than 99% and α-Al2O3The fineness of Ultramicro-powder is less than 2 μm.
7. a kind of needle coke inner liner of rotary kiln new high-tech material according to claim 6, it is characterised in that: the blending Agent includes the additive and water-reducing agent that weight ratio is 1:1, and additive is calcium chlorate cement, and water-reducing agent is sodium tripolyphosphate or gathers Cyanamide class condensation product.
8. a kind of needle coke inner liner of rotary kiln new high-tech material according to claim 7, it is characterised in that: the new high-tech material Raw material including following parts by weight: 70 parts of electrofused mullites, mullite fine powder, the mullite of 10 part of 320 mesh of 10 part of 200 mesh are thin Powder, 3.5 parts of activity SiO2Ultramicro-powder, 3.5 parts of α-Al2O3Ultramicro-powder, 1.5 parts of calcium chlorate cement, 1.5 parts of sodium tripolyphosphates.
9. the preparation method of -8 any a kind of needle coke inner liner of rotary kiln new high-tech materials according to claim 1, special Sign is: the following steps are included: (1) is successively added a certain amount of aggregate into kneading equipment according to parts by weight, fine materials, surpassed Micro mist is uniformly mixed；(2) admixture is added into kneading equipment, is thoroughly mixed and uniformly gets product；(3) it detects；(4) Packaging.
10. a kind of preparation method of needle coke inner liner of rotary kiln new high-tech material according to claim 9, feature exist In the detection method of the step (3) are as follows: finished product made from step (2) is added in mold, be made length, width and height having a size of 160mm × 40mm × 40mm sample block demoulds after standing 24 hours, and then natural curing is placed in 110 DEG C of baking oven for three days Sample, and the compressive resistance of test sample, bulk density, flexural strength, Linear change rate is made in drying 24 hours.
CN201910888996.7A 2019-09-19 2019-09-19 A kind of needle coke inner liner of rotary kiln new high-tech material and preparation method thereof Pending CN110526724A (en)

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Application publication date: 20191203