CN104119092B - Fireclay refractory healant - Google Patents
Fireclay refractory healant Download PDFInfo
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- CN104119092B CN104119092B CN201410395115.5A CN201410395115A CN104119092B CN 104119092 B CN104119092 B CN 104119092B CN 201410395115 A CN201410395115 A CN 201410395115A CN 104119092 B CN104119092 B CN 104119092B
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Abstract
The present invention relates to a kind of fireclay refractory healant, it comprises following component: (a) waste and old fireclay refractory powder, and this waste and old fireclay refractory and fireclay refractory to be repaired are same materials; B () concentration is the sodium silicate solution of 22 ~ 30wt%, the modulus of wherein said water glass is 2.2 ~ 2.8; (c) NaOH; Wherein said waste and old fireclay refractory powder: sodium silicate solution: NaOH=13 ~ 15:6 ~ 8:1, weight ratio.Healant of the present invention is economical and practical, pollution-free, and adhesive speed is fast, effective, and fireclay refractory can be made to recycle, a large amount of loss reduced because its breakage brings.
Description
Technical field
The invention belongs to refractory materials healant technical field.
Background technology
The shortcomings such as fireclay refractory is widely used with features such as its raw material simple cheap, easily manufacture, but because itself material limit, causes poor stability, easily ftracture during temperature shock, and resistance to compression shock strength is not enough.So fireclay refractory is very easily damaged after use repeatedly.Fireclay refractory after breakage is mostly passed into disuse or is done his use, which results in huge waste.Industrial hope is always reused after repairing the fireclay refractory of these breakages.
At present, the technology of repairing refractory materials has a variety of, as: a kind of gun-mix refractory is for spraying new lining body or fettling, be made up of a certain proportion of particulate material and fine powder, add and form " dilution system " after appropriate water carries out mix and blend and be that carrier is ejected into construction surface with high-pressure blast; Ceramic welding technique adopts the mixture of a kind of pottery and metallic particles, is used for repairing the refractory materials in Industrial Stoves; The wear-resisting repair material of KB-M antiknock take phosphoric acid salt as bonding agent, be main aggregate with selected corundum and superfine aluminite, matrix composition is optimized by adding the super-fine powder that can improve wear resisting property and intensity, and add efficient admixture, product has the performance of excellent wear resisting property, antistrip performance and antiscour, erosion, etc.
Although the technology of repairing refractory materials has a lot, be all to repair for the purpose of large-sized industrial kiln, if these technology be used for repairing the small-sized refractory materialss such as clayey saggar, refractory brick, not only effect is bad, and cost is high, loses more than gain.
Summary of the invention
In order to overcome the deficiency of existing refractory materials repairing technique, the invention provides a kind of healant and the method for repairing and mending that are specifically designed to fireclay refractory, solve prior art high for repairing fireclay refractory cost, the problems such as weak effect, not only can repair the fireclay refractory in large-sized industrial kiln, and be applicable to repair small-sized fireclay refractory.This healant is economical and practical, pollution-free, and adhesive speed is fast, effective, and fireclay refractory can be made to recycle, a large amount of loss reduced because its breakage brings.
First aspect present invention relates to a kind of fireclay refractory healant, and it comprises following component:
(a) waste and old fireclay refractory powder, this waste and old fireclay refractory and fireclay refractory to be repaired are same materials;
B () concentration is the sodium silicate solution of 22 ~ 30wt%, the modulus of wherein said water glass is 2.2 ~ 2.8;
(c)NaOH；
Wherein said waste and old fireclay refractory powder: sodium silicate solution: NaOH=12 ~ 16:6 ~ 8:1, weight ratio.
A second aspect of the present invention relates to a kind of method of repairing fireclay refractory, and it comprises the following steps:
(1) preparation is used for the healant of fireclay refractory, and wherein this healant comprises following component:
(a) waste and old fireclay refractory powder, this waste and old fireclay refractory and fireclay refractory to be repaired are same materials;
B () concentration is the sodium silicate solution of 22 ~ 30wt%, the modulus of wherein said water glass is 2.2 ~ 2.8;
(c)NaOH；
Wherein said waste and old fireclay refractory powder: sodium silicate solution: NaOH=12 ~ 16:6 ~ 8:1, weight ratio;
(2) above-mentioned healant is evenly applied to the breakage of fireclay refractory to be repaired;
(3) healant will be smeared and to dispose in normal temperature environment lower more than 48 hours, or smear healant place with fire baking, and make described healant all dry, complete repairing.
Wherein said normal temperature refers to 10-35 DEG C.
In preferred embodiments, further comprising the steps of after step (3):
(4) fireclay refractory completing repairing is entered calcining kiln calcining, described healant is sintered and improves further to repair intensity.
The present invention with waste and old fireclay refractory for one of starting material, the granularity of expectation is ground to (about such as 325 orders through dry milling technique such as pulverizing, or, the granulometric facies of the raw clay particle of the fireclay refractory to be repaired with formation are seemingly) after, be mixed with gelling material by a certain percentage with sodium silicate solution and sodium hydroxide, obtain described healant.This healant is evenly applied to breakage (such as crack, fracture, the hole etc.) place of fireclay refractory, after being re-engaged, leave standstill 48 hours or rapid heating dry can reach very high resistance to compression, folding strength, now, namely think and complete patch work.Next step, then the fire resistive material product this repaired is sent in calcining kiln after calcining, this healant is at high temperature sintered, and its intensity improves further, can realize cementing completely.
Wherein, sodium silicate solution is industrial common binder material.Water glass is the soluble alkali metal silicate material by alkalimetal oxide and silica bound, and also known as sodium silicate, its molecular formula is respectively M
2onSiO
2, wherein M represents basic metal, such as sodium or potassium, and the coefficient n in above formula is called modulus of water glass, is the mol ratio of silicon oxide in water glass and alkalimetal oxide.
The present invention's key is combinationally using of waste and old fireclay refractory, sodium silicate solution and NaOH.As everyone knows, NaOH is highly basic, and it can have corrosive nature to clay material, and reduces the refractory temperature of refractory materials.Therefore, in traditional refractory materials healant, NaOH dare not be used as its composition.The present invention then breaches above-mentioned technology prejudice, courageously employs NaOH, not only achieves extraordinary repair efficiency, and in follow-up use procedure, do not find the phenomenon that the fireclay refractory goods after repairing have any refractory temperature to decline.
Beneficial effect of the present invention is as follows:
(1) one of raw material is waste and old refractory materials, can use after preliminary fragmentation, and water glass and NaOH consumption few, so cost is lower, and achieve the recycling of fireclay refractory.
(2) the simple environmental protection of raw material, preparation and construction process without toxic gas, zero release.After drying calcining, material is nontoxic, free from environmental pollution.
(3) high temperature application performance is good, the present invention adopts the material identical with repaired refractory materials as repairing base-material, at high temperature patching material and repaired material keep close rate of expansion and shrinking percentage substantially, therefore can stand multiple high temp calcining and not break.
(4) the fireclay refractory joint strength bondd with the present invention is high, and reach more than 20Mpa through measuring its ultimate compression strength, folding strength can reach about 15Mpa.
(5) after having had the present invention, fireclay refractory can reuse repeatedly, remarkable benefit, especially more obvious to clayey saggar, refractory brick etc. that usage quantity is larger.
Accompanying drawing explanation
Nothing
Embodiment
Following examples only illustrate the present invention, are not used in restriction the present invention.
Embodiment 1
With sodium silicate, (modulus is for 2.5, concentration 26%) be raw material, according to waste and old fireclay refractory powder: use after the weight ratio of sodium silicate solution: NaOH=14:7:1 is mixed with healant, for repairing the damaged saggar be made up of fireclay refractory.After repairing, under normal temperature after dry 48 hours, be 20 ~ 22Mpa through measuring its ultimate compression strength, folding strength is 15 ~ 16Mpa, and the saggar intensity after 1050 DEG C of high-temperature calcinations after repairing is promoted about 6% further.After saggar after the present invention repairs uses 5 times under 1050 DEG C of high temperature, breakage rate is less than 5%.
Comparative example 1
It is same that with sodium silicate, (modulus is for 2.5, concentration 26%) be raw material, do not add NaOH, with waste and old fireclay refractory powder: for repairing the damaged saggar be made up of fireclay refractory after sodium silicate solution=14:7 (weight ratio) is mixed with colloid.After repairing, under normal temperature after dry 48 hours, its ultimate compression strength is only 10 ~ 11Mpa, and folding strength is 7 ~ 8Mpa.With this materials repairing clayey saggar, use 5 times under 1050 DEG C of high temperature after, breakage rate is more than 80%.
Embodiment 1 and comparative example 1 contrast visible, and the present invention uses NaOH, not only does not reduce the pressure-proof and snap-resistent intensity under repaired refractory materials high temperature, make its intensity be under same proportioning about 2 times on the contrary.
Embodiment 2
With reference to the experimental arrangement of embodiment 1 and condition, but wherein the modulus of water glass, concentration, material proportion change into as shown in following table 1 and table 2:
The data of table 1. sodium silicate solution
| Modulus of water glass | Concentration, wt% | |
| Sodium silicate water solution A | 2.2 | 22％ |
| Sodium silicate aqueous solution B | 2.2 | 30％ |
| Potash water glass aqueous solution C | 2.8 | 22％ |
| Potash water glass aqueous solution D | 2.8 | 30％ |
Table 2. experiment condition and result
Wherein, ultimate compression strength and folding strength all measure after dry 48 hours after repairing.Again enter kiln forge high temperature burn after, ultimate compression strength and folding strength approximately can also promote about 5 ~ 8%.
Claims (3)
1. a fireclay refractory healant, it comprises following component:
(a) waste and old fireclay refractory powder, this waste and old fireclay refractory and fireclay refractory to be repaired are same materials;
B () concentration is the sodium silicate solution of 22 ~ 30wt%, the modulus of wherein said water glass is 2.2 ~ 2.8;
(c)NaOH；
Wherein said waste and old fireclay refractory powder: sodium silicate solution: NaOH=13 ~ 15:6 ~ 8:1, weight ratio.
2., to the method that fireclay refractory is repaired, it comprises the following steps:
(1) preparation is used for the healant of fireclay refractory, and wherein this healant comprises following component:
(a) waste and old fireclay refractory powder, this waste and old fireclay refractory and fireclay refractory to be repaired are same materials;
B () concentration is the sodium silicate solution of 22 ~ 30wt%, the modulus of wherein said water glass is 2.2 ~ 2.8;
(c)NaOH；
Wherein said waste and old fireclay refractory powder: sodium silicate solution: NaOH=13 ~ 15:6 ~ 8:1, weight ratio;
(2) above-mentioned healant is evenly applied to the breakage of fireclay refractory to be repaired;
(3) healant will be smeared and to dispose in normal temperature environment lower more than 48 hours, or smear healant place with fire baking, and make described healant all dry, complete repairing.
3. method according to claim 2, it is further comprising the steps of after step (3):
(4) fireclay refractory completing repairing is entered calcining kiln calcining, described healant is sintered and improves further to repair intensity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410395115.5A CN104119092B (en) | 2014-08-13 | 2014-08-13 | Fireclay refractory healant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410395115.5A CN104119092B (en) | 2014-08-13 | 2014-08-13 | Fireclay refractory healant |
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| CN104119092B true CN104119092B (en) | 2015-09-02 |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101880168B (en) * | 2009-05-07 | 2013-01-30 | 营口东邦冶金设备耐材有限公司 | Hot mending material for spray gun |
| CN101613208A (en) * | 2009-07-31 | 2009-12-30 | 王宏伟 | Sealing coating composition of kiln |
| CN101660869B (en) * | 2009-08-13 | 2012-09-19 | 甘肃中顺石化工程装备有限公司 | Spray repair method for lining of kiln firebrick |
| CN102010217B (en) * | 2010-12-28 | 2012-12-26 | 河南省耕生耐火材料有限公司 | Spray paint for ladle hot-spraying |
| CN102173835B (en) * | 2011-01-15 | 2012-11-28 | 潍坊联兴炭素有限公司 | Pot type calciner ceramic welding material and method for repairing pot type calciner |
| CN102924093B (en) * | 2011-08-12 | 2015-01-21 | 上海梅山钢铁股份有限公司 | Filler suitable for repairing brick joints of coke oven |
| CN102674851A (en) * | 2012-04-25 | 2012-09-19 | 大连金州金鞍耐火材料有限公司 | Quick-drying and repairing refractory material |
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