CN109400133A - A kind of nanometer combines the high-purity electroquartz product of low stomata and preparation method - Google Patents
A kind of nanometer combines the high-purity electroquartz product of low stomata and preparation method Download PDFInfo
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Abstract
The present invention discloses the electroquartz product and preparation method that a kind of high-purity, low stomata, erosion-resisting characteristics is good, wear-resisting property is high, nanometer combines, original material of the invention are as follows: electroquartz aggregate, electroquartz fine powder;Bonding agent is scale liquid silica, and additive is nanometer grade powder silica;40-70 parts of electroquartz aggregate, 30-60 parts of electroquartz fine powder, 0.1-5 parts of scale liquid silica, 0.1-5 parts of nanometer grade powder silica;The present invention additionally uses the weak hydrogen reduction of low temperature and is rapidly fired to system.
Description
Technical field
The present invention relates to a kind of electroquartz product more particularly to a kind of high-purity, low stomata, erosion-resisting characteristics are good, resistance to
Grind performance height, the electroquartz product that nanometer combines and preparation method.
Background technique
At present, coke oven is the main Thermal Equipment of coking.Coking furnace shaft by furnace roof, combustion chamber and carbonization chamber, chute area,
The parts such as regenerative chamber, and be connected by flue with chimney, main portions are built by silica brick, be using abnormity to make good airproof performance
Brick is built.
However, coke oven silica brick bears coal in use expands the pressure of generation during charing, and coaling, coke pushing
With caused abrasion and the peeling of the discharging of the coke.Abrasion and peeling will lead to refractory brick rough surface, and this will lead to coke furnace carbonization chamber shape
State is deteriorated, and coke pushing load increases.
In addition, the silica brick at positions such as the arch portion of glass furnace, feed openings is flown by alkali steam and mixing at high temperature for a long time
The erosion of material, in addition the influence of high temperature load, phenomena such as brick fusing, crackle chip off-falling can occur for long-time service, and these phenomenons
Glass metal can be polluted, the quality of output finished product is influenced.
The present invention solves the above problem.
Summary of the invention
The purpose of the present invention is overcoming the problems, such as that existing silica brick alkali resistant aggressivity is poor, peeling easy to wear, propose a kind of high-purity
Degree, the electroquartz product that low stomata, erosion-resisting characteristics is good, wear-resisting property is high, nanometer combines and preparation method.
To achieve the goals above, the technical solution adopted by the present invention are as follows:
Nanometer of the present invention combines the high-purity electroquartz product of low stomata, original material are as follows: electroquartz aggregate, electroquartz
Fine powder;Bonding agent is scale liquid silica, and additive is nanometer grade powder silica.
Addition parts by weight of the invention are as follows: 40-70 parts of electroquartz aggregate, 30-60 parts of electroquartz fine powder, nanoscale
0.1-5 parts of liquid silica, 0.1-5 parts of nanometer grade powder silica.
The electroquartz aggregate, purity > 99.99%, granularity≤5mm.
The shape of the electroquartz aggregate is spherical shape.
The electroquartz fine powder, purity > 99.99%, granularity≤0.09mm.
The scale liquid silica, purity > 99%, granularity 1-20nm.
The nanometer grade powder silica, purity > 95%, granularity 1-100nm.
The present invention is by introducing various high-purity raws, because high-purity raw decides the finished product of high-purity.Titanium dioxide
Silicone content is higher, and the alkali metal low melting point oxide impurity content such as aluminium, potassium, sodium is lower, and alkali resistant erosion performance is better.
Aggregate is crushed by crusher in the prior art, is irregular shape, this irregular shape
Make the shape of aggregate and particle diameter distribution be it is uncontrollable, very big difficulty can be brought to the microstructural control of final product.
Aggregate of the invention select it is spherical, due to spherical diameter be it is certain, the accumulation of aggregate is also uniform, and
Reduce stress concentration, is conducive to the uniformity for improving article construction.
The present invention optimizes the grain size distribution of aggregate and fine powder, to construct close granularity by choosing spherical aggregate
Arrangement architecture keeps granular size arrangement close, to obtain high-densit silica brick, has the advantages that ultralow-porosity.Silica brick it is resistance to
Mill property depends on the porosity, and the lower silica brick of the porosity, compactness is better, and wear-resisting property is higher.
The present invention does not add traditionally bonding agent and mineralizer, but innovatively by introducing scale liquid titanium dioxide
Silicon is bonding agent, and nanometer grade powder silica is additive, is added, and electroquartz particle is spherical shape, makes nanoscale
Silica can be fully wrapped around and be covered on electroquartz spheric granules surface.Since grain diameter is smaller, specific surface area
It is bigger.Specific surface area increases, while adsorption capacity also enhances.Therefore nanometer grade silica can adsorb package capacitor stone completely
English particle, first is that keeping product finer and close；Second is that having completely cut off contact of the electroquartz particle with oxygen.Electroquartz is avoided in height
The problem of cristobalite, the extremely cold very hot degradation of bring and crackle tendency increase are slowly converted under warm oxidizing atmosphere, this is
Not available for the raw material of micro powder grade.
Electroquartz belongs to amorphous state vitreous silica, and thermal expansion coefficient is extremely low, practically negligible；With oxygen vacancy, chemistry
Formula is SiO2-X, but under high temperature oxidative atmosphere, vitreous silica is contacted with oxygen, and oxygen atom penetrates into vitreous silica surface layer, fills up oxygen original
It is sub vacant, so that vitreous silica surface layer is formed microstructure, further ordering develops into cristobalite.And when cristobalite converts ratio
Example increases, extremely cold very hot degradation, and crackle tendency increases.
Nanometer of the invention combine the high-purity electroquartz product of low stomata the preparation method comprises the following steps:
Step 1: the sequence of mixing: electroquartz aggregate, electroquartz fine powder, nanometer grade powder silica are weighed according to the ratio,
Mixing 5-20 minutes；Then it adds the mixing of scale liquid silica 10-30 minutes；
Step 2: physical heating, firing temperature is 600 DEG C -1200 DEG C after by machine pressure or offhand, drying, quickly burn
At, using the weak hydrogen reduction calcining system of low temperature, after firing to get to this nanometer combine the high-purity electroquartz product of low stomata.
Present invention employs easy fired system, firing temperature is 600-1200 DEG C, and firing temperature is general in the prior art
At 1250 DEG C or more.Since crystallization transformation can occur at 1100 DEG C or more for electroquartz, electroquartz is converted to cristobalite
Contraction distortion.Existing calcining system not can avoid electroquartz and be converted into cristobalite in sintering process.
Present invention employs the firings of weak hydrogen reduction atmosphere, and control firing atmosphere, makes nothing in sintering process in sintering process
Air draught flowing reduces air draught flowing bring oxygen and reacts with electroquartz, reduces cristobalite and formed.
The sintering method that the present invention uses is physical heating, and existing method is chemical reaction heating.Chemical reaction heating
The participation of reactant is required, reactant such as air and fuel can generate air-flow in kiln internal flow, the oxygen in air
It is just inevitably reacted with electroquartz, while the firing temperature of the prior art is all very high, meets electroquartz and be converted to
The conversion condition of cristobalite.Using the method for physical heating, the not participation of reactant, kiln atmosphere is tranquil, does not have air-flow stream
It is dynamic.Firing temperature belongs to low temperature simultaneously, the two conditions also avoid electroquartz to ashlar while ensureing product properties
English conversion.
Present invention employs the weak hydrogen reduction of low temperature to be rapidly fired to system.Crystallization can occur at 1100 DEG C or more and turn for electroquartz
Become, electroquartz is converted to cristobalite and shrinks deformation.The reduction of low temperature weak oxide, which is rapidly fired to system, makes product in sintering
It realizes chemical bonding, does not generate crystal transfer, electroquartz is avoided to be converted into cristobalite in sintering process, improve the anti-of product
Thermal shock performance.
The principal crystalline phase of the high-purity electroquartz silica brick of high abrasion anti-erosion of the present invention is noncrystalline phase, SiO2Content >
99%, porosity < 15%, refractoriness under load T0.6(0.2MPa): 1650-1690 DEG C.
Specific embodiment
It states technological achievement and only expresses embodiments of the present invention, the description thereof is more specific and detailed, but can not
Therefore limitations on the scope of the patent of the present invention are interpreted as.It should be pointed out that for those of ordinary skill in the art,
Without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection model of the invention
It encloses.
The present invention is described in detail in following embodiment.
Embodiment 1:
A kind of high-purity electroquartz silica brick of high abrasion anti-erosion, the granularmetric composition of each raw material and additional proportion are as follows: electroquartz bone
58 parts, granularity 0.1-5mm of material, 36 parts of electroquartz fine powder, granularity 0.001-0.09mm, scale liquid titanium dioxide
3 parts of silicon, granularity 13nm, 3 parts of nanometer grade powder silica, granularity 0-100nm.
Embodiment 2:
A kind of high-purity electroquartz silica brick of high abrasion anti-erosion, the granularmetric composition of each raw material and additional proportion are as follows: electroquartz bone
54 parts, granularity 0.1-4mm of material, 38 parts of electroquartz fine powder, granularity 0.001-0.06mm, scale liquid silica 2
Part, granularity 18nm, 6 parts of nanometer grade powder silica, granularity 0-70nm.
Embodiment 3:
A kind of high-purity electroquartz silica brick of high abrasion anti-erosion, the granularmetric composition of each raw material and additional proportion are as follows: electroquartz bone
61 parts, granularity 0.1-5mm of material, 34 parts of electroquartz fine powder, granularity is 0.001-0.04mm scale liquid silica 3
Part, granularity 10nm, 2 parts of nanometer grade powder silica, granularity 0-50nm.
Embodiment 1,2 and 3 the preparation method comprises the following steps:
Step 1: the sequence of mixing: electroquartz aggregate, electroquartz fine powder, nanometer grade powder silica are weighed according to the ratio,
Mixing 5-20 minutes；Then it adds the mixing of scale liquid silica 10-30 minutes；
Step 2: physical heating, firing temperature is 600 DEG C -1200 DEG C after by machine pressure or offhand, drying, quickly burn
At, using the weak hydrogen reduction calcining system of low temperature, after firing to get to this nanometer combine the high-purity electroquartz product of low stomata.
The performance indicator of products obtained therefrom are as follows:
Embodiment 1:SiO2Content is 99.35%, apparent porosity 13.38%, refractoriness under load T0.6(0.2MPa): 1680 DEG C.
Embodiment 2:SiO2Content is 99.27%, apparent porosity 12.51%, refractoriness under load T0.6(0.2MPa):
1665℃。
Embodiment 3:SiO2Content is 99.40%, apparent porosity 14.13%, refractoriness under load T0.6(0.2MPa):
1690℃。
Claims (7)
1. a kind of nanometer combines the high-purity electroquartz product of low stomata, it is characterised in that: original material are as follows: electroquartz aggregate, electricity
Fused quartz fine powder;Bonding agent is scale liquid silica, and additive is nanometer grade powder silica, and weight is added
Number are as follows: 40-70 parts of electroquartz aggregate, 30-60 parts of electroquartz fine powder, 0.1-5 parts of scale liquid silica, nanometer
0.1-5 parts of powder silica of grade.
2. a kind of nanometer according to claim 1 combines the high-purity electroquartz product of low stomata, it is characterised in that: electric smelting stone
English aggregate, purity > 99.99%, granularity≤5mm.
3. a kind of nanometer according to claim 2 combines the high-purity electroquartz product of low stomata, it is characterised in that: electric smelting stone
The shape of English aggregate is spherical shape.
4. a kind of nanometer according to claim 1 combines the high-purity electroquartz product of low stomata, it is characterised in that: electric smelting stone
English fine powder, purity > 99.99%, granularity≤0.09mm.
5. a kind of nanometer according to claim 1 combines the high-purity electroquartz product of low stomata, it is characterised in that: nanoscale
Liquid silica, purity > 99%, granularity 1-20nm.
6. a kind of nanometer according to claim 5 combines the high-purity electroquartz product of low stomata, it is characterised in that: nanoscale
Powder silica, purity > 95%, granularity 1-100nm.
7. the preparation method of a kind of nanometer of combination high-purity electroquartz product of low stomata according to claim 1, feature
It is: Step 1: the sequence of mixing: weighing electroquartz aggregate, electroquartz fine powder, nanometer grade powder titanium dioxide according to the ratio
Silicon mixes 5-20 minutes；Then it adds the mixing of scale liquid silica 10-30 minutes；Step 2: by machine pressure or by hand
After molding, drying, physical heating, firing temperature is 600 DEG C -1200 DEG C, is rapidly fired to, and is burnt into using the weak hydrogen reduction of low temperature
System combines the high-purity electroquartz product of low stomata after firing to get to this nanometer.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114163224A (en) * | 2021-12-15 | 2022-03-11 | 洛阳迈乐耐火材料有限公司 | Fiber-reinforced silicon module and preparation method thereof |
| CN116621569A (en) * | 2023-05-25 | 2023-08-22 | 河南蚂蚁新材料有限公司 | High-purity amorphous quartz ceramic and preparation method thereof |
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| US4866015A (en) * | 1987-02-17 | 1989-09-12 | Dr. C. Otto Feuerfest Gmbh | Silica brick and process for producing same |
| CN101265073A (en) * | 2008-04-18 | 2008-09-17 | 郑州大学 | Nano composite silica brick and its preparation method |
| CN101323530A (en) * | 2008-07-01 | 2008-12-17 | 山东中齐耐火材料集团有限公司 | Fused quartz block for coke oven hot repair |
| CN102126866A (en) * | 2011-04-06 | 2011-07-20 | 瑞泰科技股份有限公司 | High-purity silica refractory material and production process thereof |
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2018
- 2018-11-01 CN CN201811294225.7A patent/CN109400133A/en active Pending
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|---|---|---|---|---|
| US4866015A (en) * | 1987-02-17 | 1989-09-12 | Dr. C. Otto Feuerfest Gmbh | Silica brick and process for producing same |
| CN101265073A (en) * | 2008-04-18 | 2008-09-17 | 郑州大学 | Nano composite silica brick and its preparation method |
| CN101323530A (en) * | 2008-07-01 | 2008-12-17 | 山东中齐耐火材料集团有限公司 | Fused quartz block for coke oven hot repair |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114163224A (en) * | 2021-12-15 | 2022-03-11 | 洛阳迈乐耐火材料有限公司 | Fiber-reinforced silicon module and preparation method thereof |
| CN116621569A (en) * | 2023-05-25 | 2023-08-22 | 河南蚂蚁新材料有限公司 | High-purity amorphous quartz ceramic and preparation method thereof |
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Application publication date: 20190301 |