CN105272274A - Preparation method of anti-osmosis permeable brick fire clay - Google Patents
Preparation method of anti-osmosis permeable brick fire clay Download PDFInfo
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- CN105272274A CN105272274A CN201510615290.5A CN201510615290A CN105272274A CN 105272274 A CN105272274 A CN 105272274A CN 201510615290 A CN201510615290 A CN 201510615290A CN 105272274 A CN105272274 A CN 105272274A
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Abstract
The invention discloses a preparation method of anti-osmosis permeable brick fire clay. The method comprises the following steps: preparing a graphite mono-dispersed slurry, preparing co-ground powder, carrying out vacuum mixing, and carrying out vacuum packaging. The preparation method of the anti-osmosis permeable brick fire clay allows the amount of bubbles in the fire clay to be extremely low and molten steel and steel slag non-wetted graphite micro-powder to be uniformly dispersed, so osmosis of the molten steel and the steel slag to the fire clay is difficult; and the graphite micro-powder makes the fire clay be difficult to sinter, and allows permeable bricks to be easily removed in the permeable brick replacement process, so cracking of brick cups is effectively avoided, and safe implementation of molten steel refining is guaranteed.
Description
Technical field
The invention belongs to technical field of refractory materials, be specifically related to a kind of preparation method of impermeable gas permeable brick chamotte.
Background technology
Along with the raising day by day that Iron And Steel Industry requires Cleanliness of Molten Steel, usually gas permeable brick is set at ladle bottom, promotes the refining of molten steel by gas permeable brick rare gas element of jetting in ladle.Gas permeable brick is divided into monoblock type and split type two kinds.Split type gas permeable brick is applicable to the refining furnaces such as working conditions harsher LF, VD, VOD, its installation method is: first from ladle is inner, ventilating seat brick is anchored on the bag end, then chamotte on gas permeable brick box hat surface smear, from ladle is outside, gas permeable brick is loaded brick cup endoporus, be fixed with locking mechanism, dry bag subsequently and come into operation.Because working conditions is very harsh, the Corrosion rate of gas permeable brick, much larger than brick cup, so need at hot lower replacing gas permeable brick, with faster production rhythm, is enhanced productivity, also can be realized effective utilization of ventilating seat brick simultaneously.
At present, split type gas permeable brick chamotte generally adopts corundum or chrome corundum chamotte, and bonding agent used is mostly clay, phosphoric acid, phosphoric acid salt, water glass or bittern etc.The shortcoming of this type of chamotte is: void content is high, bubble is many, high-temperature shrinkage is large, molten steel and slag easily permeate in chamotte and shrinkage joint, the erosive velocity of chamotte is accelerated, the speed also corresponding quickening that its box hat protected is melted by molten steel, the cross-section probability in gas permeable brick hot junction is caused to increase, service life significantly declines, and reliability and security significantly reduce; Chamotte is easy to sintering, and sintering strength is higher, is difficult to remove, also can causes comparatively macrolesion to brick cup, leave potential safety hazard when exerting oneself excessive when changing gas permeable brick.
Summary of the invention
The present invention is intended to overcome prior art defect, and object is to provide a kind of preparation method with strong, the readily removable gas permeable brick chamotte removed of impermeabilisation ability.
Object of the present invention is achieved by the following technical programs, comprises the following steps:
1. graphite Monodispersed slurry is prepared: 5-20wt% graphite microparticles, 80-95wt% dispersed graphite silicon sol are inserted refiner, high-speed stirring 10-20 minute, makes graphite Monodispersed slurry;
2. preparation abrasive dust altogether: 88-97wt% lapis amiridis, 2-10wt% alumina powder, 1-2wt% antioxidant are inserted alumina ceramic ball mill, grinds 12-24 hour altogether, make evenly abrasive dust altogether;
3. vacuum is mixed: by 80-97wt% evenly altogether abrasive dust, 3-20wt% magnesia insert vacuum muller, additional 15 ± 1wt% graphite Monodispersed slurry, vacuumizes the 20-30 minute that mixes, makes even pug;
4. vacuum packaging: even pug is inserted plastics bag, vacuumizes packaging, makes impermeable gas permeable brick chamotte.
Described graphite microparticles, fixed carbon 99%, granularity 1-38 μm; Dispersed graphite silicon special colloidal sol, content 20%, density 1.1g/cm
3.
Described corundum is one in plate diamond spar, white fused alumina or both combinations, Al
2o
3> 99%, granularity 325 order; Alumina powder, Al
2o
3> 99%, granularity D
50=5 μm; Magnesia, MgO > 97%, granularity 0.5-0.2mm; Antioxidant is metallic silicon power, Si > 99%, granularity 325 order.
Described vacuum vacuum tightness of mixing is greater than 96kPa.
Compared with prior art, the beneficial effect that the present invention brings is: in high-temperature service process, and the aluminum oxide in chamotte and magnesium oxide react generation aluminum-spinel, and the volumetric expansion produced not only can avoid high-temperature shrinkage stitch but also have hot fastening effect; Dispersed, the vacuum of graphite microparticles that dispersed graphite silicon special colloidal sol realizes is mixed the thorough elimination of the chamotte bubble caused, molten steel and slag is made to be difficult to permeate in chamotte, improve the erosion-resisting characteristics of chamotte, reduce the speed that gas permeable brick box hat is melted by high-temperature molten steel, greatly reduce the probability that gas permeable brick hot junction is cross-section, significantly improve the service life of gas permeable brick; The dispersed chamotte that makes of graphite microparticles is difficult to sintering, is easy to remove, can effectively avoids brick cup to ftracture, ensure that the safety of liquid steel refining is carried out when changing gas permeable brick.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail, the restriction not to its protection domain.
Embodiment 1
A preparation method for impermeable gas permeable brick chamotte, comprises the following steps:
1. graphite Monodispersed slurry is prepared: 10wt% graphite microparticles, 90wt% dispersed graphite silicon sol are inserted refiner, high-speed stirring 15 minutes, make graphite Monodispersed slurry;
2. preparation abrasive dust altogether: 90wt% white alundum powder, 9wt% alumina powder, 1wt% metallic silicon power are inserted alumina ceramic ball mill, grinds 20 hours altogether, make evenly abrasive dust altogether;
3. vacuum is mixed: by 90wt% evenly altogether abrasive dust, 10wt% magnesia insert vacuum muller, additional 15wt% graphite Monodispersed slurry, vacuumizes and mixes 25 minutes, make even pug;
4. vacuum packaging: even pug is inserted plastics bag, vacuumizes packaging, makes impermeable gas permeable brick chamotte.
Embodiment 2
A preparation method for impermeable gas permeable brick chamotte, comprises the following steps:
1. graphite Monodispersed slurry is prepared: 15wt% graphite microparticles, 85wt% dispersed graphite silicon sol are inserted refiner, high-speed stirring 18 minutes, make graphite Monodispersed slurry;
2. preparation abrasive dust altogether: 93wt% white alundum powder, 5.5wt% alumina powder, 1.5wt% metallic silicon power are inserted alumina ceramic ball mill, grinds 20 hours altogether, make evenly abrasive dust altogether;
3. vacuum is mixed: by 85wt% evenly altogether abrasive dust, 15wt% magnesia insert vacuum muller, additional 16wt% graphite Monodispersed slurry, vacuumizes and mixes 25 minutes, make even pug;
4. vacuum packaging: even pug is inserted plastics bag, vacuumizes packaging, makes impermeable gas permeable brick chamotte.
Embodiment 3
A preparation method for impermeable gas permeable brick chamotte, comprises the following steps:
1. graphite Monodispersed slurry is prepared: 12wt% graphite microparticles, 88wt% dispersed graphite silicon sol are inserted refiner, high-speed stirring 16 minutes, make graphite Monodispersed slurry;
2. preparation abrasive dust altogether: 91wt% plate diamond spar powder, 8wt% alumina powder, 1wt% metallic silicon power are inserted alumina ceramic ball mill, grinds 20 hours altogether, make evenly abrasive dust altogether;
3. vacuum is mixed: by 82wt% evenly altogether abrasive dust, 18wt% magnesia insert vacuum muller, additional 16wt% graphite Monodispersed slurry, vacuumizes and mixes 26 minutes, make even pug;
4. vacuum packaging: even pug is inserted plastics bag, vacuumizes packaging, makes impermeable gas permeable brick chamotte.
Embodiment 4
A preparation method for impermeable gas permeable brick chamotte, comprises the following steps:
1. graphite Monodispersed slurry is prepared: 13wt% graphite microparticles, 87wt% dispersed graphite silicon sol are inserted refiner, high-speed stirring 15 minutes, make graphite Monodispersed slurry;
2. preparation abrasive dust altogether: 50wt% white alundum powder, 41wt% plate diamond spar powder, 7.8wt% alumina powder, 1.2wt% metallic silicon power are inserted alumina ceramic ball mill, grinds 24 hours altogether, make evenly abrasive dust altogether;
3. vacuum is mixed: by 84wt% evenly altogether abrasive dust, 16wt% magnesia insert vacuum muller, additional 16wt% graphite Monodispersed slurry, vacuumizes and mixes 25 minutes, make even pug;
4. vacuum packaging: even pug is inserted plastics bag, vacuumizes packaging, makes impermeable gas permeable brick chamotte.
Claims (4)
1. a preparation method for impermeable gas permeable brick chamotte, is characterized in that comprising the following steps:
1. graphite Monodispersed slurry is prepared: 5-20wt% graphite microparticles, 80-95wt% dispersed graphite silicon sol are inserted refiner, high-speed stirring 10-20 minute, makes graphite Monodispersed slurry;
2. preparation abrasive dust altogether: 88-97wt% lapis amiridis, 2-10wt% alumina powder, 1-2wt% antioxidant are inserted alumina ceramic ball mill, grinds 12-24 hour altogether, make evenly abrasive dust altogether;
3. vacuum is mixed: by 80-97wt% evenly altogether abrasive dust, 3-20wt% magnesia insert vacuum muller, additional 15 ± 1wt% graphite Monodispersed slurry, vacuumizes the 20-30 minute that mixes, makes even pug;
4. vacuum packaging: even pug is inserted plastics bag, vacuumizes packaging, makes impermeable gas permeable brick chamotte.
2. the preparation method of a kind of impermeable gas permeable brick chamotte according to claim 1, is characterized in that, step 1., graphite microparticles, fixed carbon 99%, granularity 1-38 μm; Dispersed graphite silicon special colloidal sol, content 20%, density 1.1g/cm
3.
3. the preparation method of a kind of impermeable gas permeable brick chamotte according to claim 1, is characterized in that, 2., corundum is one in plate diamond spar, white fused alumina or both combinations to step, Al
2o
3> 99%, granularity 325 order; Alumina powder, Al
2o
3> 99%, granularity D
50=5 μm; Antioxidant is metallic silicon power, Si > 99%, granularity 325 order.
4. the preparation method of a kind of impermeable gas permeable brick chamotte according to claim 1, is characterized in that, step 3., magnesia, MgO > 97%, granularity 0.5-0.2mm; Vacuum vacuum tightness of mixing is greater than 96kPa.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510615290.5A CN105272274B (en) | 2015-09-18 | 2015-09-18 | A kind of preparation method of impermeable air brick chamotte |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510615290.5A CN105272274B (en) | 2015-09-18 | 2015-09-18 | A kind of preparation method of impermeable air brick chamotte |
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| Publication Number | Publication Date |
|---|---|
| CN105272274A true CN105272274A (en) | 2016-01-27 |
| CN105272274B CN105272274B (en) | 2017-09-12 |
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| CN201510615290.5A Active CN105272274B (en) | 2015-09-18 | 2015-09-18 | A kind of preparation method of impermeable air brick chamotte |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101148362A (en) * | 2007-09-03 | 2008-03-26 | 武汉科技大学 | Forsterite-carbon refractory brick and preparation method thereof |
| CN101508587A (en) * | 2009-03-26 | 2009-08-19 | 中钢集团洛阳耐火材料研究院有限公司 | Corundum-spinel pouring material containing nano-magnesium carbonate |
| CN102731139A (en) * | 2012-07-11 | 2012-10-17 | 洛阳市科创耐火材料有限公司 | Anti-seepage air-permeable brick and manufacturing method thereof |
| CN104310872A (en) * | 2014-09-27 | 2015-01-28 | 安徽省中坤元新型建材有限公司 | A light thermally-insulating waterproof partition plate and a manufacturing method thereof |
-
2015
- 2015-09-18 CN CN201510615290.5A patent/CN105272274B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101148362A (en) * | 2007-09-03 | 2008-03-26 | 武汉科技大学 | Forsterite-carbon refractory brick and preparation method thereof |
| CN101508587A (en) * | 2009-03-26 | 2009-08-19 | 中钢集团洛阳耐火材料研究院有限公司 | Corundum-spinel pouring material containing nano-magnesium carbonate |
| CN102731139A (en) * | 2012-07-11 | 2012-10-17 | 洛阳市科创耐火材料有限公司 | Anti-seepage air-permeable brick and manufacturing method thereof |
| CN104310872A (en) * | 2014-09-27 | 2015-01-28 | 安徽省中坤元新型建材有限公司 | A light thermally-insulating waterproof partition plate and a manufacturing method thereof |
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| CN105272274B (en) | 2017-09-12 |
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