CN106830958A - A kind of low aluminum heat conduction Alkali resistant castable refractory - Google Patents

A kind of low aluminum heat conduction Alkali resistant castable refractory Download PDF

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CN106830958A
CN106830958A CN201710170995.XA CN201710170995A CN106830958A CN 106830958 A CN106830958 A CN 106830958A CN 201710170995 A CN201710170995 A CN 201710170995A CN 106830958 A CN106830958 A CN 106830958A
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heat conduction
aluminum heat
alkali resistant
castable refractory
low aluminum
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CN106830958B (en
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刘春乐
刘勇
程殿勇
徐彬
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Beijing Sea Jincheng Refractories Co Ltd
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Beijing Sea Jincheng Refractories Co Ltd
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Abstract

The invention discloses a kind of low aluminum heat conduction Alkali resistant castable refractory, count by weight percentage, constitute and be：Flint clay 55 60%；Plate diamond spar powder 10 15%；Alumina powder 4 8%；Compound resistance to ground caustic 4 6%；Fine silica powder 4 8%；Micro-pore mullite 3 6%；Magnesium aluminate spinel 4 6%；Perovskite 1 2%；Solid pore forming agent 1 3%；Pure calcium aluminate cement 4 8%；Water reducer 0.1 0.5%；Retarder 0.01 0.1%.Beneficial effects of the present invention：Resulting low aluminum heat conduction Alkali resistant castable refractory has relatively low aluminium content, it is lower than common castable thermal conductivity, on the other hand, addition solid pore forming agent, the castable obtained by enabling significantly reduces the bulk density and thermal conductivity of castable, reduces the heat loss of preheater, in addition, addition is combined resistance to ground caustic, can resist the erosion of the clinker atmosphere of different raw material generations, it is not easy to produce alkali cracking.

Description

A kind of low aluminum heat conduction Alkali resistant castable refractory
Technical field
The present invention relates to mould material field, it particularly relates to a kind of low aluminum heat conduction Alkali resistant castable refractory.
Background technology
Setting brick is not suitable in the double-decker lining at the positions such as preheater top cover, cone, tertiary-air pipe, therefore these Using castable more at the position.In use, the corrosive substance such as alkali, sulphur constantly circulates and fire resisting is poured cement kiln in kiln Material feeding is eroded, and is ultimately resulted in and is occurred slight crack on castable refractory, and the castable refractory service life on cement kiln is shortened, no Obtaining infrequently carries out repairing work, influences the normal operation of cement kiln.Therefore, the alkaline resistance properties of castable how is improved With the Shi Ge manufacturers problem in the urgent need to address that increases the service life.On the other hand, preheater in the course of the work, has No small heat loss, from the point of view of being discharged for energy saving, reduction, how to reduce this loss also needs to solve as current One of technical problem certainly.
For the problem in correlation technique, effective solution is not yet proposed at present.
The content of the invention
For the above-mentioned technical problem in correlation technique, the present invention proposes a kind of low aluminum heat conduction Alkali resistant castable refractory, can The erosion of alkaline atmosphere is resisted well, also, on the premise of resistance material washes away erosion, thermal conductivity factor is low, can reduce The heat loss of preheater, plays the technique effect of energy-saving and emission-reduction.
To realize above-mentioned technical purpose, the technical proposal of the invention is realized in this way：
A kind of low aluminum heat conduction Alkali resistant castable refractory, count by weight percentage, constitutes and is：Flint clay 55-60%；Plate diamond spar powder 10-15%；Alumina powder 4-8%；The compound 4-6% of resistance to ground caustic；Fine silica powder 4-8%；Micro-pore mullite 3-6%；Magnalium point is brilliant Stone 4-6%；Perovskite 1-2%；Solid pore forming agent 1-3%；Pure calcium aluminate cement 4-8%；Water reducer 0.1-0.5%；Retarder 0.01- 0.1%。
Further, the solid pore forming agent is one or two in following material：Polystyrene sphere, carbon black.
Further, the water reducer is sodium tripolyphosphate.
Further, the retarder is one or two in following material：Citric acid, tartaric acid, oxalic acid, maleic Diacid.
Further, the compound resistance to ground caustic composition is：Carborundum 10-20%, zircon sand 10-20%, fused magnesite 60- 80%。
Further, the raw material meet following index：Flint clay granularity is 1-7 mesh;Plate diamond spar Powder Particle Size is 325 Mesh；1 μm of alumina powder granularity ＜；It is 200 mesh to be combined alkaline-resisting Powder Particle Size；Fine silica powder≤0.5 μm；Micro-pore mullite grain Degree ＜ 3mm；Magnesium aluminate spinel granularity ＜ 3mm；Perovskite granularity ＜ 3mm；Solid pore forming agent is 80 ~ 120 mesh；Aluminous cement is pure Specific surface area 5500g/cm.
Castable of the present invention, is particularly suitable as being used on preheater on cement kiln production line.The present invention is selected Flint clay（Also referred to as one-level hard paste clinker）As the aggregate of castable, it is desirable to Al2O3>=44%, Fe2O3<1.5%.Jiao Bao Stone is a kind of high-quality hard fire clay, stable components, homogeneous, compact structure.Count by weight percentage, using 55- 60% flint clay and the micro-pore mullite particle of 3-6% add the plate diamond spar fine powder of 10-15%, the cast being made as aggregate Material has intensity very high.Wherein, plate diamond spar be it is a kind of it is pure, without such as MgO, B2O3Burnt till etc. any additive Thoroughly alundum is shunk, with the thick, well-developed α-Al of crystallization2O3Crystal structure, Al2O3Content 99% with On.En plaque crystal structure, stomata is small and holds one's breath that hole is more and the porosity is about the same with electro-corundum, and purity is high, and volume is steady Qualitative good, minimum reheating is shunk.The features such as mullite has high temperature resistant in itself, thermal expansion river health chemical erosion is strong, micropore Mullite particle is compared with common mullite particle, and tool thermal conductivity factor is lower.Using flint clay, micro-pore mullite particle as pouring The finished product castable toughness that material feeding aggregate addition plate diamond spar draws is strong, can well improve the intensity and scour resistance of finished product Can, meanwhile, it is capable to significantly improve the heat-proof quality of finished product castable, reduce the heat loss of preheater.
Pure calcium aluminate cement fills alumina powder, when castable is mixed, two kinds as the accelerator for hardening of jetting material Material is added simultaneously, it is ensured that jetting material ensures there is good mobility in shaping, in the time for limiting after shaping, energy Jetting material is set to obtain enough intensity.
The effect for adding water reducer is material is reached gravity flow effect in few amount of water.By being pumped into rifle On mouth, the addition of water is 6-8% of the castable weight or so.Wherein, water reducer belongs to reagent material commonly used in the art, Commercially obtain.Water reducer is preferably sodium tripolyphosphate.
Solid pore forming agent, volatilization of burning at high temperature leaves stomata, can significantly reduce the bulk density of castable and lead Heating rate, reduces the heat loss of preheater.Wherein, carbon black leaves that hole is smaller as pore creating material, and the thermal conductivity for obtaining finished product is also got over It is low, and polystyrene sphere is larger as the hole that pore creating material leaves, and show that the thermal conductivity of finished product is of a relatively high, it is also possible to select Polystyrene sphere is used as pore creating material simultaneously with carbon black.
On the one hand add retarder can make jetting material dispersed in gun slot, jetting material is being gone out spray gun Flowing well is not solidified and reached before mouthful.Retarder is one or two in following material：Citric acid, tartaric acid, oxalic acid, Maleic acid.
It is to strengthen the alkaline resistance properties after castable injection molded to add the effect for being combined resistance to ground caustic.By weight percentage Calculate, the compound resistance to ground caustic composition is：Carborundum 10-20%, zircon sand 10-20%, fused magnesite 60-80%.
Beneficial effects of the present invention：It is improved by castable component of the prior art, using flint clay, micropore Mullite particle as castable aggregate, and add plate diamond spar powder, alumina powder, fine silica powder, magnesium aluminate spinel, The powders such as perovskite, control the consumption of pure calcium aluminate cement, resulting low aluminum heat conduction Alkali resistant castable refractory to have relatively low aluminium Content, it is lower than common castable thermal conductivity, on the other hand, solid pore forming agent is added, the castable obtained by enabling shows The bulk density and thermal conductivity for reducing castable are write, the heat loss of preheater is reduced, additionally, addition is combined resistance to ground caustic, Neng Goukang Hit the erosion of the clinker atmosphere of different raw material generations, it is not easy to produce alkali cracking.
Specific embodiment
Further detailed is made to a kind of low aluminum heat conduction Alkali resistant castable refractory of the present invention below in conjunction with specific embodiment Thin description, it is only used for explaining the present invention, is not used in the limitation present invention, and specific raw material involved in the present invention can be from business Approach is obtained：
Embodiment one：
Flint clay 55kg；Plate diamond spar powder 12kg；Alumina powder 5kg；The compound 5kg of resistance to ground caustic；Fine silica powder 6kg；It is micro- Hole mullite 4kg；Magnesium aluminate spinel 5kg；Perovskite 1kg；Solid pore forming agent 2kg；Pure calcium aluminate cement 4.7kg；Water reducer 0.25kg；Retarder 0.05kg obtains finished product after being stirred in mixing plant, appropriate silicon is added into when using molten Glue and water, stirring form required to well mixed, the material for being mixed after cast, vibration, the demoulding, maintenance, baking Globality refractory material liner body.
Wherein, raw material meet following index：Flint clay granularity is 1-7 mesh;Plate diamond spar Powder Particle Size is 325 mesh；Oxidation 1 μm of aluminium powder size ＜；It is 200 mesh to be combined alkaline-resisting Powder Particle Size；Fine silica powder≤0.5 μm；Micro-pore mullite granularity ＜ 3mm；Magnesium aluminate spinel granularity ＜ 3mm；Perovskite granularity ＜ 3mm；Solid pore forming agent is 80 ~ 120 mesh；Aluminous cement is pure to compare table Area 5500g/cm.
Wherein, all carbon blacks of solid pore forming agent 2kg.
Wherein, all sodium tripolyphosphates of water reducer 0.25kg.
Wherein, retarder 0.05kg is citric acid 0.02kg, tartaric acid 0.03kg.
Wherein, it is combined in the 5kg of resistance to ground caustic, carborundum is 0.5kg, zircon sand is 0.5kg, fused magnesite 4kg.
Embodiment two：
Flint clay 60kg；Plate diamond spar powder 11kg；Alumina powder 4kg；The compound 4kg of resistance to ground caustic；Fine silica powder 5kg；It is micro- Hole mullite 3kg；Magnesium aluminate spinel 4kg；Perovskite 1.5kg；Solid pore forming agent 1.5kg；Pure calcium aluminate cement 5.5kg；Diminishing Agent 0.4kg；Retarder 0.1kg obtains finished product after being stirred in mixing plant, appropriate silicon is added into when using molten Glue and water, stirring form required to well mixed, the material for being mixed after cast, vibration, the demoulding, maintenance, baking Globality refractory material liner body.
Wherein, raw material meet following index：Flint clay granularity is 1-7 mesh;Plate diamond spar Powder Particle Size is 325 mesh；Oxidation 1 μm of aluminium powder size ＜；It is 200 mesh to be combined alkaline-resisting Powder Particle Size；Fine silica powder≤0.5 μm；Micro-pore mullite granularity ＜ 3mm；Magnesium aluminate spinel granularity ＜ 3mm；Perovskite granularity ＜ 3mm；Solid pore forming agent is 80 ~ 120 mesh；Aluminous cement is pure to compare table Area 5500g/cm.
Wherein, solid pore forming agent 1.5kg is carbon black 1.0kg, polystyrene sphere 0.5kg.
Wherein, all sodium tripolyphosphates of water reducer 0.4kg.
Wherein, retarder 0.1kg is oxalic acid 0.06kg, maleic acid 0.04kg.
Wherein, it is combined in the 4kg of resistance to ground caustic, carborundum is 0.8kg, zircon sand is 0.8kg, fused magnesite 2.4kg.
Embodiment three：
Flint clay 58kg；Plate diamond spar powder 10kg；Alumina powder 4kg；The compound 6kg of resistance to ground caustic；Fine silica powder 4kg；It is micro- Hole mullite 5kg；Magnesium aluminate spinel 4kg；Perovskite 1.8kg；Solid pore forming agent 3kg；Pure calcium aluminate cement 4kg；Water reducer 0.18kg；Retarder 0.02kg obtains finished product after being stirred in mixing plant, appropriate silicon is added into when using molten Glue and water, stirring form required to well mixed, the material for being mixed after cast, vibration, the demoulding, maintenance, baking Globality refractory material liner body.
Wherein, raw material meet following index：Flint clay granularity is 1-7 mesh;Plate diamond spar Powder Particle Size is 325 mesh；Oxidation 1 μm of aluminium powder size ＜；It is 200 mesh to be combined alkaline-resisting Powder Particle Size；Fine silica powder≤0.5 μm；Micro-pore mullite granularity ＜ 3mm；Magnesium aluminate spinel granularity ＜ 3mm；Perovskite granularity ＜ 3mm；Solid pore forming agent is 80 ~ 120 mesh；Aluminous cement is pure to compare table Area 5500g/cm.
Wherein, solid pore forming agent 3kg is carbon black 1.5kg, polystyrene sphere 1.5kg.
Wherein, all sodium tripolyphosphates of water reducer 0.18kg.
Wherein, retarder 0.02 is citric acid.
Wherein, it is combined in the 6kg of resistance to ground caustic, carborundum is 1.2kg, zircon sand is 0.6kg, fused magnesite 4.2kg.
Low aluminum heat conduction Alkali resistant castable refractory obtained by embodiment 1 ~ 3 is as shown in table 1：
The performance test data of each embodiment low aluminum heat conduction Alkali resistant castable refractory of table 1：

Claims (6)

1. a kind of low aluminum heat conduction Alkali resistant castable refractory, it is characterised in that count by weight percentage, constitutes and is：Flint clay 55- 60%；Plate diamond spar powder 10-15%；Alumina powder 4-8%；The compound 4-6% of resistance to ground caustic；Fine silica powder 4-8%；Micropore does not come Stone 3-6%；Magnesium aluminate spinel 4-6%；Perovskite 1-2%；Solid pore forming agent 1-3%；Pure calcium aluminate cement 4-8%；Water reducer 0.1- 0.5%；Retarder 0.01-0.1%.
2. a kind of low aluminum heat conduction Alkali resistant castable refractory according to claim 1, it is characterised in that the solid pore forming agent is One or two in following material：Polystyrene sphere, carbon black.
3. a kind of low aluminum heat conduction Alkali resistant castable refractory according to claim 1, it is characterised in that the water reducer is trimerization Sodium phosphate.
4. a kind of low aluminum heat conduction Alkali resistant castable refractory according to claim 1, it is characterised in that the retarder is following One or two in material：Citric acid, tartaric acid, oxalic acid, maleic acid.
5. a kind of low aluminum heat conduction Alkali resistant castable refractory according to claim 1, it is characterised in that by weight percentage Calculate, the compound resistance to ground caustic composition is：Carborundum 10-20%, zircon sand 10-20%, fused magnesite 60-80%.
6. a kind of low aluminum heat conduction Alkali resistant castable refractory according to claim 1 ~ 5, it is characterised in that the raw material meet Following index：Flint clay granularity is 1-7 mesh;Plate diamond spar Powder Particle Size is 325 mesh；1 μm of alumina powder granularity ＜；It is compound alkaline-resisting Powder Particle Size is 200 mesh；Fine silica powder≤0.5 μm；Micro-pore mullite granularity ＜ 3mm；Magnesium aluminate spinel granularity ＜ 3mm；Calcium Titanium ore granularity ＜ 3mm；Solid pore forming agent is 80 ~ 120 mesh；The pure specific surface area 5500g/cm of aluminous cement.
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