CN104671805B - A kind of crusting resistant pouring material and preparation method thereof - Google Patents
A kind of crusting resistant pouring material and preparation method thereof Download PDFInfo
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- CN104671805B CN104671805B CN201510032995.4A CN201510032995A CN104671805B CN 104671805 B CN104671805 B CN 104671805B CN 201510032995 A CN201510032995 A CN 201510032995A CN 104671805 B CN104671805 B CN 104671805B
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Abstract
The present invention provides a kind of crusting resistant pouring material, is made up of magnesium aluminate spinel, flint clay micropowder, silicon carbide powder, cement, alpha-silicon nitride powders, low temperature bonding agent, high-temperature agglomerant, water reducer and explosion-proof fiber.Present invention simultaneously provides the preparation method of a kind of crusting resistant pouring material, including premix, batch mixing, be dried and selection packaging.The castable that the present invention makes has good anti-scaling property and shock resistance under each state of temperature.
Description
Technical field
The present invention relates to cement kiln fire resisting material field, particularly relate to a kind of crusting resistant pouring material and preparation side thereof
Method.
Background technology
In cement manufacturing, new type nonaqueous cement rotary kiln is widely used.But it is as manufacture of cement efficiency to carry
Height, yield strengthens, the various impurity in rotary kiln, including heavy metal ion, sulfur, chlorine, alkali etc., circulation collection in rotary kiln,
Easily form skinning at kiln tail system and block, affect the properly functioning of cement rotary kiln.Use in the market is anti-
Skinning castable, mainly with carborundum as raw material, sticks to surface and forms glaze layer, play anti-erosion, the effect of resistive connection skin.
At the kiln tail of rotary kiln, system stability is generally 800-1000 DEG C, and Tercod belongs to neutral fire proofed wood
Material, thermal shock resistance is good, but when temperature rises to 1200 DEG C, its oxidation resistance is greatly reduced, the SiO of material surface2
Thin film starts liquid phase binding material occur with CaO reaction, and anti-scaling property lost efficacy.The most general organic binder bond starts to lose
Effect, adhesive property forfeiture, material anti-seismic performance declines, and occurs peeling off.Fireproof magnesia alumina spinel material can at high temperature have good
Good anti-scaling property, but its anti-seismic performance is poor, needs the binding agent that high temperature low temperature durability degree is the highest, therefore improves viscous
The high temp effect of knot agent will be greatly improved the anti-scaling property of rotary kiln castable.
Chinese patent CN102838364B discloses a kind of high-strength alkaline-resisting resistive connection skin castable refractory, by high tension insulator block
Material, carborundum, silicon ash, pure calcium aluminate cement, flint clay, shaft furnace calcined bauxite in powder, homogeneous material powder form, and have excellent alkaline-resisting resistive connection skin
Performance, but high temperature anti-seismic performance is poor, and 1000 DEG C are not good enough with upward stability.Chinese patent 101987793B discloses a kind of water
Stall crusting resistant pouring material, uses aluminum silica refractory as aggregate, and additional electric melting magnesium aluminum spinel, silicon nitride, α aoxidize
Aluminum micropowder, silicon ash, aluminous refractory cement etc., can effectively alleviate the skinning in cement kiln, clogging, but its anti-seismic performance
Unresolved, and magnesium aluminate spinel is as castable, easy spalling failure.
Summary of the invention
Poor in order to solve crusting resistant pouring material high temperature anti-scaling property, that shock resistance is not enough problem, we have proposed one
Plant crusting resistant pouring material and preparation method thereof, use the present invention that castable can be allowed to have good resistive connection under high temperature and low temperature
Skin performance and shock resistance.
The present invention is achieved by the following technical solutions:
For achieving the above object, the present invention provides a kind of crusting resistant pouring material, is made up of the raw material of following mass percent:
Magnesium aluminate spinel: 65-86%；Flint clay micropowder: 3-6%；Silicon carbide powder: 5-8%；Cement: 2-5%；Alpha-silicon nitride powders: 2-
8%；Low temperature bonding agent: 2-5%；High-temperature agglomerant: 0.5-2%；Water reducer: 0.05-1%；Explosion-proof fiber: 0.05-0.1%；
Its raw material granularity is as follows: magnesium aluminate spinel: 1-0.088mm；Flint clay micropowder: ＜ 0.088mm；Silicon carbide powder: ＜
0.088mm；Alpha-silicon nitride powders: ＜ 0.088mm.Low temperature bonding agent is by the aluminium dihydrogen phosphate that weight ratio is 1:1-3 and sulfomethylated lignin
Acid sodium solution forms.High-temperature agglomerant is by the lanthanum that weight ratio is 1:1-3:5-15 and lanthanide metal oxide, yttrium powder and zirconium powder group
Become.Under room temperature state, between the low temperature bonding agent and the fire resisting material particle that are made up of organic binder bond, coalescence produces intensity, middle temperature
Under state, magnesium aluminate spinel powder starts and SiO2Reaction generates cordierite and produces Ceramic bond, it is provided that medium temperature intensity, high temperature shape
Under state, generate more cordierite, simultaneously zirconium powder, lanthanum and lanthanide metal oxide micropowder and the high-temperature agglomerant being combined into of yttrium powder
Stable performance, under high temperature, adhesion strength is high, and linear expansion coefficient is high, and antioxygen, sulfur gas attack are strong, and thermal shock coefficient is good so that this waters
Material feeding all has the thermal shock resistance of excellence under each state of temperature.Alpha-silicon nitride powders, owing to there being preferable heat conductivity, can reduce
Thermal stress, improves the thermal shock resistance of material.
Preferably, above-mentioned magnesium aluminate spinel purity is not less than 97%, and flint clay purity is not less than 98%, silicon carbide powder,
Alpha-silicon nitride powders purity is not less than 99.5%.
Preferably, in above-mentioned high-temperature agglomerant, the granularity of lanthanum and lanthanide metal oxide, yttrium powder and zirconium powder is d50=5 μm.
Preferably, above-mentioned cement is aluminous refractory cement.
Preferably, above-mentioned water reducer is sodium tripolyphosphate, sodium hexameta phosphate, naphthalene sulfonic acid-formaldehyde condensation product, rylnthracene sulfonin formaldehyde
At least one in condensation substance, Hemerocallis citrina Baroni melamine resin, sodium polyacrylate, polycarboxylic acid series high efficiency water reducing agent.
Preferably, above-mentioned explosion-proof fiber is the explosion-proof fiber of polypropylene.
Present invention simultaneously provides the preparation method of a kind of crusting resistant pouring material, step is as follows:
(1) premix: magnesium aluminate spinel, flint clay and cement are sent in proportion in puddle mixer and premix 5-10 minute；
(2) batch mixing: silicon carbide powder and alpha-silicon nitride powders are added in step (1) in the raw material of premix, in puddle mixer
Mix 10-30 minute；Add water reducer and explosion-proof fiber, mix 10-30 minute in puddle mixer；Add low-temperature binder and height
Temperature bonding agent, mixes 10-30 minute, makes pug；
(3) it is dried: by pug natural drying 24h in step (2), be not higher than 0.05% to moisture；
(4) selection, inspection, packaging warehouse-in.
Compared with prior art, the beneficial effects of the present invention is, castable has good under each state of temperature
Anti-scaling property and shock resistance.
Detailed description of the invention
Below in conjunction with embodiment, further illustrate present disclosure.Should be appreciated that the enforcement of the present invention is not limited to
In the following examples, any pro forma accommodation or the change of being made the present invention both fall within scope；Under and
State the method in embodiment, if no special instructions, be the conventional method of this area.
Embodiment 1:
A kind of crusting resistant pouring material, is made up of the raw material of following mass percent: magnesium aluminate spinel: 77.32%；Flint clay
Micropowder: 5%；Silicon carbide powder: 6%；Cement: 3%；Alpha-silicon nitride powders: 5%；Low temperature bonding agent: 3%；High-temperature agglomerant:
0.5%；Water reducer: 0.1%；Explosion-proof fiber: 0.08%.
Wherein in low temperature bonding agent aluminium dihydrogen phosphate and sodium lignin sulfonate solution weight than for 1:1.
In high-temperature agglomerant, lanthanum and lanthanide metal oxide, yttrium powder and zirconium powder weight ratio are 1:1:10.
Production stage is as follows:
(1) premix: magnesium aluminate spinel, flint clay and cement are sent in proportion in puddle mixer and premix 8 minutes；
(2) batch mixing: silicon carbide powder and alpha-silicon nitride powders are added in step (1) in the raw material of premix, in puddle mixer
Mix 20 minutes；Add water reducer and explosion-proof fiber, mix 20 minutes in puddle mixer；Add low-temperature binder and high temperature bond
Agent, mixes 20 minutes, makes pug；
(3) it is dried: by pug natural drying 24h in step (2), be not higher than 0.05% to moisture；
(4) selection, inspection, packaging warehouse-in.Randomization ten parts, detects each performance.
Embodiment 2:
A kind of crusting resistant pouring material, is made up of the raw material of following mass percent: magnesium aluminate spinel: 76.82%；Flint clay
Micropowder: 5%；Silicon carbide powder: 6%；Cement: 3%；Alpha-silicon nitride powders: 5%；Low temperature bonding agent: 3%；High-temperature agglomerant:
1%；Water reducer: 0.1%；Explosion-proof fiber: 0.08%.
Wherein in low temperature bonding agent aluminium dihydrogen phosphate and sodium lignin sulfonate solution weight than for 1:1.
In high-temperature agglomerant, lanthanum and lanthanide metal oxide, yttrium powder and zirconium powder weight ratio are 1:1:10.
Production stage is substantially the same manner as Example 1.After completing, randomization 10 parts carries out high-temperature behavior test.
Embodiment 3:
A kind of crusting resistant pouring material, is made up of the raw material of following mass percent: magnesium aluminate spinel: 75.82%；Flint clay
Micropowder: 5%；Silicon carbide powder: 6%；Cement: 3%；Alpha-silicon nitride powders: 5%；Low temperature bonding agent: 3%；High-temperature agglomerant:
2%；Water reducer: 0.1%；Explosion-proof fiber: 0.08%.
Wherein in low temperature bonding agent aluminium dihydrogen phosphate and sodium lignin sulfonate solution weight than for 1:1.
In high-temperature agglomerant, lanthanum and lanthanide metal oxide, yttrium powder and zirconium powder weight ratio are 1:1:10.
Production stage is substantially the same manner as Example 1.After completing, randomization 10 parts carries out high-temperature behavior test.
Comparative example:
Commercial silicon carbide crusting resistant pouring material, randomization 10 parts carries out high-temperature behavior test.
Examination criteria:
Sample is placed in calcination 3 hours at 815 DEG C, by its bulk density of YB/T5200 Indexs measure.
Sample is placed in calcination 3 hours at 815 DEG C, uses by its cold conditions compressive resistance of YB/T5201 Indexs measure.
Sample is placed in calcination 3 hours at 1500 DEG C, detects its crushing strength under high temperature.
Sample is placed in calcination 3 hours at 815 DEG C, uses KZJ-5000 electric bending testing machine for cement to pass through YB/T5201
Its cold conditions rupture strength of Indexs measure.
Sample is placed in calcination 3 hours at 815 DEG C, by its permanent line rate of change of YB/T5203 Indexs measure.
Sample is placed in calcination 3 hours at 1200 DEG C, detects Linear change rate after it burns.
Sample is placed in calcination 3 hours at 815 DEG C, uses KRZ-F02 thermal shock resistance testing machine by YB/T2206 index
Detect its thermal shock resistance.
Sample is placed in calcination 3 hours at 815 DEG C, uses HAT-12A high-temperature abrasion test machine by GB/T18301 index
Detect its wearability.
Potassium sulfate using 20% and the calcium sulfate of 10%, as skinning material, use sample to clamp skinning material up and down, 1200 DEG C
Heat treatment 3 hours, detects its anti-caking.
Result is as shown in table 1.
Table 1:
As shown in Table 1, the crusting resistant pouring material that the present invention manufactures can keep good intensity, wearability at cold conditions and high temperature
And thermal shock resistance, and increase along with high temperature bond dosage and produce more excellent high-temperature behavior.Meanwhile, what the present invention manufactured is anti-
Skinning castable can at high temperature have good resistive connection skin.
Claims (7)
1. a crusting resistant pouring material, it is characterised in that be made up of the raw material of following mass percent:
Magnesium aluminate spinel: 65-86%；
Flint clay micropowder: 3-6%；
Silicon carbide powder: 5-8%；
Cement: 2-5%；
Alpha-silicon nitride powders: 2-8%；
Low temperature bonding agent: 2-5%；
High-temperature agglomerant: 0.5-2%；
Water reducer: 0.05-1%；
Explosion-proof fiber: 0.05-0.1%；
Its raw material granularity is as follows:
Magnesium aluminate spinel: 1-0.088mm；
Flint clay micropowder: ＜ 0.088mm；
Silicon carbide powder: ＜ 0.088mm；
Alpha-silicon nitride powders: ＜ 0.088mm；
Described low temperature bonding agent is by the aluminium dihydrogen phosphate that weight ratio is 1:1-3 and sodium lignin sulfonate solution composition；Described high temperature
Binding agent is that the lanthanide metal oxide of 1:1-3:5-15, yttrium powder and zirconium powder form by weight ratio.
2. a kind of crusting resistant pouring material as claimed in claim 1, it is characterised in that described magnesium aluminate spinel purity is not less than
97%, flint clay micropowder purity is not less than 98%, and silicon carbide powder, alpha-silicon nitride powders purity are not less than 99.5%.
3. a kind of crusting resistant pouring material as claimed in claim 1, it is characterised in that lanthanide series metal oxygen in described high-temperature agglomerant
The granularity of compound, yttrium powder and zirconium powder is d50=5μm。
4. a kind of crusting resistant pouring material as claimed in claim 1, it is characterised in that described cement is aluminous refractory cement.
5. crusting resistant pouring material as claimed in claim 1 a kind of, it is characterised in that described water reducer be sodium tripolyphosphate, six
Polymeric sodium metaphosphate., naphthalene sulfonic acid-formaldehyde condensation product, rylnthracene sulfonin formaldehyde condensation products, sulfonated melamine compound resin, sodium polyacrylate, poly-
At least one in High Efficient Diswater.
6. a kind of crusting resistant pouring material as claimed in claim 1, it is characterised in that described explosion-proof fiber is the explosion-proof fibre of polypropylene
Dimension.
7. the method preparing crusting resistant pouring material described in claim 1, it is characterised in that step is as follows:
(1) premix: magnesium aluminate spinel, flint clay and cement are sent in proportion in puddle mixer and premix 5-10 minute；
(2) batch mixing: silicon carbide powder and alpha-silicon nitride powders are added in step (1) in the raw material of premix, mixes in puddle mixer
10-30 minute；Add water reducer and explosion-proof fiber, mix 10-30 minute in puddle mixer；Add low-temperature binder and high temperature knot
Mixture, mixes 10-30 minute, makes pug；
(3) it is dried: by pug natural drying 24h in step (2), be not higher than 0.05% to moisture；
(4) selection, inspection, packaging warehouse-in.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107098709A (en) * | 2017-04-19 | 2017-08-29 | 浙江华尔耐科技股份有限公司 | A kind of sludge solid waste regeneration treatment haydite kiln castable |
| CN107162576A (en) * | 2017-05-17 | 2017-09-15 | 安徽青花坊瓷业股份有限公司 | A kind of ceramic in-glaze decoration paster stamp high-temperature agglomerant |
| CN109111209B (en) * | 2018-07-27 | 2021-04-13 | 赞皇金隅水泥有限公司 | Microcrystal material for cement kiln |
| CN111484341B (en) * | 2020-03-13 | 2021-01-15 | 苏州盛曼特新材料有限公司 | Retarding composite water reducing agent for silica-free refractory self-flowing castable and preparation method thereof |
| CN114516757A (en) * | 2020-11-20 | 2022-05-20 | 江苏恒耐炉料集团有限公司 | Anti-skinning nano lining plate component for cement kiln and processing flow |
| CN115650749B (en) * | 2022-11-30 | 2023-12-15 | 长兴兴鹰新型耐火建材有限公司 | Anti-skinning high-strength castable |
| CN116003144A (en) * | 2022-12-22 | 2023-04-25 | 阳泉金隅通达高温材料有限公司 | Low-expansion refractory castable for induction heating furnace prepared from high-voltage electric porcelain reclaimed materials |
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|---|---|---|---|---|
| CN101987793A (en) * | 2010-11-12 | 2011-03-23 | 安徽瑞泰新材料科技有限公司 | Anti-skinning pouring material for cement kiln |
| CN102391002A (en) * | 2011-07-27 | 2012-03-28 | 中国建筑材料科学研究总院 | Magnesia-alumina spinel skinning-resistant non-amorphous refractory material for cement kiln as well as preparation method and application thereof |
| CN104230353A (en) * | 2014-08-26 | 2014-12-24 | 长兴兴鹰新型耐火建材有限公司 | Anti-skinning precast brick formula and preparation method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101987793A (en) * | 2010-11-12 | 2011-03-23 | 安徽瑞泰新材料科技有限公司 | Anti-skinning pouring material for cement kiln |
| CN102391002A (en) * | 2011-07-27 | 2012-03-28 | 中国建筑材料科学研究总院 | Magnesia-alumina spinel skinning-resistant non-amorphous refractory material for cement kiln as well as preparation method and application thereof |
| CN104230353A (en) * | 2014-08-26 | 2014-12-24 | 长兴兴鹰新型耐火建材有限公司 | Anti-skinning precast brick formula and preparation method thereof |
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