CN102442835A - Impregnation medium capable of improving performance of fireproof material - Google Patents
Impregnation medium capable of improving performance of fireproof material Download PDFInfo
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- CN102442835A CN102442835A CN2011103146815A CN201110314681A CN102442835A CN 102442835 A CN102442835 A CN 102442835A CN 2011103146815 A CN2011103146815 A CN 2011103146815A CN 201110314681 A CN201110314681 A CN 201110314681A CN 102442835 A CN102442835 A CN 102442835A
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- impregnation
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- dipping
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Abstract
The invention relates to an impregnation medium capable of improving the performance of a fireproof material. The impregnation medium is characterized by being one of a sodium silicate solution, a silica sol solution and a liquid-state organic silicon resin. The impregnation medium is used for replacing traditional middle-temperature and low-temperature asphalt impregnation media so that the impregnation process can be carried out under states which are close to normal-temperature and normal-pressure states and any treatment is not needed after the impregnation. With the adoption of the impregnation medium provided by the invention, under the condition of ensuring that the use performance of impregnation products is the same as that of the middle-temperature and low-temperature asphalt impregnation media, the impregnation modification with low energy consumption and high efficiency is realized, the impregnation medium is nontoxic and does not contain any substance which possibly causes damages to the human body and does not generate harmful volatile substances in the impregnation process, and the environmental friendliness of the process is good, so that two disadvantages that the temperature is high and the pressure is great when the asphalt impregnation is performed and smoke is generated to harm an operator and pollute the environment are ovrcome fundamentally. In the invention, the traditional impregnation process equipment does not need to be changed so that the use is convenient.
Description
Technical field
The present invention relates to a kind of steeping medium that improves capabilities of refractory materials, relate in particular to and improve the steeping medium of steel-making with sliding sprue tile for smelting heat-shock resistance and anti-molten steel erosion performance.
Background technology
Sliding sprue tile for smelting is an important function property refractory component in the steelmaking process, directly controls the flow of molten steel, thereby the quality of its performance directly influences steel-making quality, the person and device security.The production of sliding sprue tile for smelting is generally through technologies such as mechanical high-pressure molding, drying burn till, polish; Owing to receive the restriction of various conditions; Can not in its component, add and more can resist molten steel erosive raw material (like graphite, carbon black etc.); The apparent porosity of goods is reached below 1% or lower, cause the anti-erosion of sliding sprue tile for smelting thus, abrasion resistance can be not high enough.Equally, aluminium carbon and magnesium carbon refractory product, because of same reason, its anti-erosion, structural strength performance are not high yet.For compensating its defect, all adopt the thermal treatment later stage that goods are imposed impregnation technology both at home and abroad, reach and improve the goods physicals, and improve corrosion-resistant, abrasion resistance ability.
Prior art steel-making is flooded employed steeping medium with sliding sprue tile for smelting and aluminium carbon and magnesium carbon refractory product (general designation refractory product); In being generally or soft pitch; Method is that the refractory product that is preheated to 180-200 ℃ in advance (for example sliding sprue tile for smelting) is put into high pressure vessel, will heat to 180-220 ℃ middle temperature or soft pitch and be evacuated in the high pressure vessel through vacuumizing (for example 35mbar), is forced into 1.2-1.6Mpa and pressurize 0.5-2 hour; Temperature or soft pitch are penetrated into refractory product inside in making; To reduce the apparent porosity of goods, improve the carbon content of goods, improve the goods physicals; Thereby increase product surface to molten steel invade the profit angle, improve the anti-molten steel erosional competency of goods.But energy consumption is than higher on the one hand for employed steeping medium, and process is long, needs usually about 3-6 hour; The middle temperature or the soft pitch that heat 180-220 ℃ on the other hand can produce a large amount of bitumen flue gas, contain volatilizable toxic substance in the pitch, and not only to the certain hazardness of the healthy generation of operator, and a large amount of bitumen flue gas is very big to the influence of environment.
The dipping treatment solution of Chinese patent CN101148366 refractory materials and carbon materials, colloidal sol are formed weight percent and are: SiO
23～50%; Al
2O
32～50%; B
2O
30.01～50%; H
2O25～70%; , solution adds P when being acidity less than 30%
2O
5, solution adds Na when being alkalescence less than 5%
2O+K
2O.Stop up pore through dipping, make fire resistive material product intensity increase compact structure; Improve the antioxidant property and the heat resistanceheat resistant destructive characteristics of material, improve work-ing life.
Chinese patent CN1730442 improves magnesite refractory technical feature method, and magnesite refractory is positioned in the vacuum unit, be evacuated to-0.05～-0.1Mpa; Pressurize 1～15 minute, suction contains chromium presoma Nano sol or for the chromic oxide precursor sol or for the magnesia chrome spinel precursor sol, is forced into 0.1～0.5Mpa again under this vacuum state; Pressurize 1～15 minute; Magnesite refractory is taken out in release, and drying is 10～72 hours under 100～200 ℃ condition.Both increase the chromic oxide content of magnesite refractory, reduced air vent aperture again.Have that air vent aperture is little, narrowly distributing, advantage such as apparent porosity is low and resistance to fouling is good.
Chinese patent CN1557779 refractory materials or metal founding dip treating technology, are put into steeper with refractory materials or metal casting product and are sealed the first step, take out inner air with vacuum pump, and vacuum kept 5-180 minute; Second step, open the liquid flowing valve of the pipeline that is connected with said steeper, with aluminium dihydrogen phosphate liquid or Lutafei F type resin liquid (English name: Rutaphen F-Type Resins) be input to flood in the steeper and soaked body; The 3rd step, open blow-off valve and make in the steeper and to close blow-off valve after reaching balance with outside pressure; The 4th step, open air compressor machine and in steeper, pressurizes, pressurize is 0.2-5 hour when treating that pressure reaches 0.05-2Mpa; The 5th step, slowly open said liquid flowing valve the liquid in the steeper is discharged; After liquid in the container to be impregnated is discharged fully; Close feed liquor valve and air compressor machine; Open blow-off valve and make pressure and extraneous balance in the steeper, open the steeper lid and take out refractory materials or metal founding oven dry, can improve 2-5 work-ing life doubly.
Chinese patent CN1075309 process for making of aluminium-carbon refractories; Behind the trimming, the blank after the shaping is put into pressure vessel, the adding furane resin soak it and establish whole blank in container again; Under the pressure of 6-15 kilograms per centimeter 2; The normal temperature hold-time is 30-90 minute, and the blank that dipping is good leaves standstill under solidification value 150-250 ℃, and the time is 16-30 hour.Its apparent oxygen porosity is reduced to below 4% by original 14%, and compressive strength is increased to 40-60MPa, has improved physical strength greatly.
Above-mentioned patent, though also through impregnation technology product properties is improved, the life-span is improved, not enough below existing: the steeping medium that has contains the deleterious heavy metal of the person, and the steeping medium preparation is complicated; Particularly their steeping processs are still longer, and need vacuum impregnation, and the dipping difficulty is big, and facility investment is big, and the still higher relatively defective of dipping energy consumption is not overcome.
Above-mentioned deficiency still has is worth improved place.
Summary of the invention
The object of the invention is to overcome the deficiency of above-mentioned prior art, provides a kind of steeping medium simple, and the dipping Heating temperature is low, the steeping medium of the raising capabilities of refractory materials that the feature of environmental protection is good.
The object of the invention realizes; The main improvement is that test and Selection adopts sodium silicate solution or silicon sol solution or liquid organosilicon resin; In replacing widely using at present, soft pitch, under normal temperature, normal pressure, flood, do not need behind the dipping to handle again separately; Thereby overcome the deficiency of above-mentioned prior art, realize the object of the invention.Specifically, the present invention improves the steeping medium of capabilities of refractory materials, it is characterized in that steeping medium is a kind of in sodium silicate solution, silicon sol solution, the liquid organosilicon resin.
In addition; For reaching better dipping effect, and further shorten time of immersion, can above-mentioned steeping medium suitably be heated to 40-100 ℃; Under this temperature above-mentioned medium have better mobile than normal temperature, thereby more help shortening time of immersion and reduce impregnation pressure; Simultaneously goods are preheated to 60-80 ℃, are immersed in for example 0.05Mpa of pressure-fired, dipping effect is better.
The present invention improves the steeping medium of capabilities of refractory materials; With respect to the prior art steeping medium owing to adopt good sodium silicate solution of liquid fluidity or silicon sol solution or liquid organosilicon resin to make steeping medium, substitute original in, the soft pitch steeping medium; Steeping process can be carried out under approximate normal temperature, atmospheric pressure state (if suitably heating is like 40-100 ℃ of temperature; Suitably minute-pressure such as 0.05Mpa then flood faster), need not do any processing behind the dipping yet.Dipping back goods apparent porosity reduction value and volume density increased value have all reached pitch dielectric soak effect same, and impregnated sample is on probation through reality steel-making, use 2 stoves after, slide plate plate any surface finish is complete, nothing is washed away the vestige equivalent damage.Simultaneously apparent porosity reduces, also increased product surface to molten steel invade the profit angle, thereby improved the anti-molten steel erosional competency of goods.Steeping medium of the present invention is in guaranteeing dipped goods and flooding, under the identical use properties of soft pitch steeping medium; Realized dipping modification less energy-consumption, high-level efficiency, steeping medium is nontoxic, does not contain anyly possibly cause Health hazard material (like chromium, boric acid, phosphoric acid etc.) to the person; Do not produce unwanted volatile during dipping; The technology feature of environmental protection is good, and fundamentally having solved bituminizing needs that temperature is high, pressure is big, and produces flue gas operator's infringement and environment are polluted two big shortcomings.The present invention improves the capabilities of refractory materials steeping medium; Need not change existing impregnation technology equipment; Easy to use, not only can be used for the sliding sprue tile for smelting dipping, and can also be used for other aluminium carbon and magnesium carbon refractory product dipping; And can reach and have the constructed effect of sliding sprue tile for smelting, for example improve corrosion-resistant property and thermal structure intensity.
Below be example with the sliding sprue tile for smelting dipping; Essence of the present invention is further understood in exemplary illustration and help; But the embodiment detail only is in order the present invention to be described, not to represent the present invention to conceive whole technical schemes down, therefore should not be construed as the total technical scheme of the present invention to be limited; Some are In the view of the technician; The unsubstantiality that does not depart from the present invention's design increases and/or change, and for example simple the change or replacement of technical characterictic to have same or similar technique effect all belongs to protection domain of the present invention.
Embodiment
Embodiment 1: sliding sprue tile for smelting, steeping medium are commercial sodium silicate solution (being commonly called as water glass), and medium temperature is respectively 40,50,60 ℃; 60 ℃ of goods preheating temperatures; Impregnation pressure 0.05Mpa, 0.5 hour dwell time (same bituminizing pressure 1.6Mpa, dwell time 3h).
Embodiment 2: sliding sprue tile for smelting, steeping medium concentration are the 75-85wt% silicon sol solution.Medium temperature is respectively 60,70,80 ℃, 100 ℃ of goods preheating temperatures, impregnation pressure 0.05Mpa, 0.5 hour dwell time (same bituminizing pressure 1.6Mpa, dwell time 3h).
Embodiment 3: sliding sprue tile for smelting, steeping medium are silicone resin solution.Medium temperature is respectively 30,40,50 ℃, 60 ℃ of goods preheating temperatures, impregnation pressure 0.05Mpa, 0.5 hour dwell time (bituminizing pressure 1.6Mpa, dwell time 3h).
Table 1 presentation of results: 40,50,60 ℃ of sodium silicate solution steeping medium temperature; 60 ℃ of goods preheating temperatures, impregnation pressure 0.05Mpa is under the situation of 0.5 hour dwell time; Behind dipping, can reach middle soft pitch (220 ℃ of medium temperatures, pressure 1.6Mpa; Dwell time 3h) same effect, dipping temperature is significantly less than middle low temperature pitch prill, and the differing temps dipping effect is basic identical.
Table 2 presentation of results: 60,70,80 ℃ of silicon sol steeping medium temperature; 100 ℃ of goods preheating temperatures, impregnation pressure 0.05Mpa is under 0.5 hour dwell time situation; Can reach middle soft pitch (220 ℃ of medium temperatures, pressure 1.6Mpa behind the dipping; Dwell time 3h) same effect, and dipping temperature be significantly less than in the low temperature pitch prill, and the differing temps dipping effect is basic identical.
Table 3 presentation of results: 30,40,50 ℃ of silicone resin solution impregnation medium temperatures; 60 ℃ of goods preheating temperatures, impregnation pressure 0.05Mpa is under 0.5 hour dwell time situation; Can reach middle soft pitch (220 ℃ of medium temperatures, pressure 1.6Mpa behind the dipping; Dwell time 3h) same effect, and dipping temperature be significantly less than in the low temperature pitch prill, and the differing temps dipping effect is basic identical.
To those skilled in the art, under this patent design and specific embodiment enlightenment, some distortion that can directly derive or associate from this patent disclosure and general knowledge, those of ordinary skills will recognize also can adopt additive method; Or use substituting of known technology in the prior art always, and the equivalence of characteristic changes or modification, the mutual various combination between characteristic; For example dipping is not heated, and in normal temperature, floods, and it is identical to improve performance; Just time of immersion has prolongation slightly, or the like unsubstantiality change, can be employed equally; Can both realize this patent representation function and effect, launch for example no longer one by one to describe in detail, all belong to this patent protection domain.
Claims (3)
1. improve the steeping medium of capabilities of refractory materials, it is characterized in that steeping medium is a kind of in sodium silicate solution, silicon sol solution, the liquid organosilicon resin.
2. according to the steeping medium of the said raising capabilities of refractory materials of claim 1, medium is heated to 40-100 ℃ when it is characterized in that flooding, and dipped goods is preheated to 60-80 ℃, is immersed in pressure-fired and carries out.
3. according to the steeping medium of the said raising capabilities of refractory materials of claim 2, it is characterized in that flooding pressure-fired is 0.05Mpa.
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| CN2011103146815A CN102442835A (en) | 2011-10-18 | 2011-10-18 | Impregnation medium capable of improving performance of fireproof material |
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|---|---|---|---|
| CN2011103146815A CN102442835A (en) | 2011-10-18 | 2011-10-18 | Impregnation medium capable of improving performance of fireproof material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105036802A (en) * | 2015-09-14 | 2015-11-11 | 山东耐火材料集团有限公司 | Production method for high-strength compact silica bricks |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101119946A (en) * | 2005-02-24 | 2008-02-06 | 路易吉·贝得利尼 | Method for the consolidation of ornamental stones, device and relevant plant |
| CN102173863A (en) * | 2010-12-31 | 2011-09-07 | 中国科学院过程工程研究所 | Preparation method of furnace bottom roller graphite carbon sleeve impregnating solution |
-
2011
- 2011-10-18 CN CN2011103146815A patent/CN102442835A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101119946A (en) * | 2005-02-24 | 2008-02-06 | 路易吉·贝得利尼 | Method for the consolidation of ornamental stones, device and relevant plant |
| CN102173863A (en) * | 2010-12-31 | 2011-09-07 | 中国科学院过程工程研究所 | Preparation method of furnace bottom roller graphite carbon sleeve impregnating solution |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105036802A (en) * | 2015-09-14 | 2015-11-11 | 山东耐火材料集团有限公司 | Production method for high-strength compact silica bricks |
| CN105036802B (en) * | 2015-09-14 | 2017-05-24 | 山东耐火材料集团有限公司 | Production method for high-strength compact silica bricks |
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Application publication date: 20120509 |