CN102320849B - Inorganically bonded magnesia-carbon brick - Google Patents
Inorganically bonded magnesia-carbon brick Download PDFInfo
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- CN102320849B CN102320849B CN 201110247063 CN201110247063A CN102320849B CN 102320849 B CN102320849 B CN 102320849B CN 201110247063 CN201110247063 CN 201110247063 CN 201110247063 A CN201110247063 A CN 201110247063A CN 102320849 B CN102320849 B CN 102320849B
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- magnesia
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- carbon brick
- lime
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- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 44
- 239000011449 brick Substances 0.000 title claims abstract description 40
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 93
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 47
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 44
- 238000002156 mixing Methods 0.000 claims abstract description 35
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 25
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 25
- 239000004571 lime Substances 0.000 claims abstract description 25
- 238000002360 preparation method Methods 0.000 claims abstract description 11
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 10
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 10
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 17
- 238000001125 extrusion Methods 0.000 claims description 13
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 12
- 239000010703 silicon Substances 0.000 claims description 11
- 229910052710 silicon Inorganic materials 0.000 claims description 11
- 239000000292 calcium oxide Substances 0.000 claims description 10
- 235000012255 calcium oxide Nutrition 0.000 claims description 10
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 9
- 239000000920 calcium hydroxide Substances 0.000 claims description 8
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 8
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000000839 emulsion Substances 0.000 claims description 5
- 229910002804 graphite Inorganic materials 0.000 claims description 5
- 239000010439 graphite Substances 0.000 claims description 5
- 239000006229 carbon black Substances 0.000 claims description 4
- 239000004411 aluminium Substances 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 235000013312 flour Nutrition 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 2
- 239000010426 asphalt Substances 0.000 claims description 2
- -1 norbide Chemical compound 0.000 claims description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000011819 refractory material Substances 0.000 abstract description 3
- 239000011230 binding agent Substances 0.000 abstract description 2
- 239000002341 toxic gas Substances 0.000 abstract description 2
- 229910021487 silica fume Inorganic materials 0.000 abstract 2
- 239000002002 slurry Substances 0.000 abstract 2
- 238000000748 compression moulding Methods 0.000 abstract 1
- 239000003344 environmental pollutant Substances 0.000 abstract 1
- 231100000719 pollutant Toxicity 0.000 abstract 1
- 238000003825 pressing Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 238000003723 Smelting Methods 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 239000002893 slag Substances 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000007767 bonding agent Substances 0.000 description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 235000011089 carbon dioxide Nutrition 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000011302 mesophase pitch Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical group [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- RWDBMHZWXLUGIB-UHFFFAOYSA-N [C].[Mg] Chemical compound [C].[Mg] RWDBMHZWXLUGIB-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000013056 hazardous product Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
Abstract
Belonging to the technical field of refractory material preparation, the invention relates to an inorganically bonded magnesia-carbon brick, specifically an environment friendly magnesia-carbon brick. The brick of the invention is prepared by the main components of magnesia and carbon, additionally with 2.2-4 parts of lime slurry and 0.1-0.5 part of silica fume, and 0-5 parts of antioxidant can also be added. The brick is prepared by the steps of: mixing the magnesia, carbon, lime slurry, silica fume and antioxidant, then placing them in a die, conducting compression moulding with a pressing machine of high tonnage; putting a moulded green brick into a kiln channel for baking, and taking the brick out of the kiln channel, thus obtaining a finished product of inorganically bonded magnesia-carbon brick. Compared with original technologies, the magnesia-carbon brick produced in the invention saves energy and manpower, reduces pollutant discharge. And the inorganic binding agent employed in the production process of the brick of the invention does not volatilize any toxic gas.
Description
Technical field
The present invention is a kind of inorganic in conjunction with magnesia carbon brick, and specifically the environment friendly magnesium carbon brick belongs to the refractory materials preparing technical field.
Background technology
Magnesian fusing point is 2800 ℃, has very strong heat-resisting ability, but its heat-shock resistance, slag penetration resistance are poor.Carbon materials take graphite as representative also has very strong heat-resisting ability, and its thermal expansivity is low, heat-shock resistance is very excellent, at high temperature be difficult for infiltrating with molten steel, slag, the two is compound according to a certain percentage, by the wedding agent combination, form a kind of refractory materials-magnesia carbon brick of good combination property.Magnesia carbon brick is mainly used in making steel refractory materials, such as converter, steel-smelting electric furnace, ladle etc.Because promoting the use of of magnesia carbon brick improved life-span and the security of lining of steel-smelting furnace, reduced the refractory wear in the steelmaking process, promoted the raising of Iron And Steel Industry production capacity.
Wedding agent is the key component of magnesia carbon brick, and magnesia carbon brick now adopts the organic bond combination usually, and organic bond mainly is phenolic resin binder and pitch wedding agent.All containing poisonous and hazardous material in these two kinds of wedding agents, is inevitable contaminate environment all in the production and application process of wedding agent or magnesia carbon brick.
Summary of the invention
The object of the present invention is to provide a kind of magnesia carbon brick of inorganic combination, this magnesia carbon brick uses the inorganic bonding agent combination, the environmental pollution that can avoid organic bond to produce.
According to technical scheme provided by the invention, inorganic preparation method in conjunction with magnesia carbon brick, formula rate is counted by weight, and step is as follows:
(1) preparation of lime white: get 2-4 part water and 1 part of unslaked lime or slaked lime and add in the container, leave standstill after the mixing above 48h, the upper strata clear solution is liming, and lower floor's emulsion is lime white;
(2) mixing: adding 80-99 part magnesia, 1-20 part carbon element, 2.2-4 part lime white, silicon ash 0.1-0.5 part mix in mixing machine and obtain mixing pug in the mixing roll;
(3) extrusion forming: put into press die mixing pug, the 150-250MPa extrusion forming becomes adobe;
(4) baking: the kiln road is put in the adobe after the moulding toasted, pass into reducing gas N
2Or CO, storing temperature is 190-250 ℃, it is inorganic in conjunction with magnesia carbon brick namely to get product.
In mixing roll, add again in the step (2) greater than 0 less than 5 parts antioxidant;
Described antioxidant is: one or more in aluminium powder, silica flour, silicon carbide, norbide, silicon nitride or the Sialon.
The ratio of lime is 25%-50% in the described lime white.
Described carbon element is one or more in graphite, carbon black and the asphalt powder.
Described inorganic bonding agent is the combination of lime white and silicon ash.Lime white is the suspension liquid that unslaked lime or slaked lime form in water.The silicon ash be iron alloy when smelting duriron and industrial silicon (Pure Silicon Metal), produce the very strong SiO of a large amount of volatility and Si gas in the ore-smelting furnace, form with the rapid oxidation condensation of air precipitation behind the gaseous emission, it is the by product during large industry is smelted.
The effect of magnesia is high thermal resistance, the resistance to slag corrosion that keeps magnesia carbon brick.
The effect of carbon element is to keep inorganic hot strength in conjunction with magnesia carbon brick, heat-shock resistance, slag penetration resistance.
The silicon ash generates silica gel and plays keying action at the high-temperature steam Water Under.The silicon ash can also suppress the aquation of magnesia in the magnesia carbon brick.
The lime white that forms after the unslaked lime slaking is the colloid of spherical fine particle high dispersing, and the surface has reduced the frictional force between the particle with thicker moisture film, has good plasticity.Calcium hydroxide and silicon ash produce the bonding force that is similar to calcium silicate cement under hot environment.Present most kilns road all be to heat by burning carbonaceous fuel.Contain carbonic acid gas in the stack gas wherein.Carbonic acid gas and calcium hydroxide can react generation calcium carbonate.Calcium carbonate has higher intensity, can improve the normal temperature strength of magnesia carbon brick.
Calcium hydroxide is produced calcium oxide behind pyrolytic decomposition, improve the calcium oxide ratio of magnesia carbon brick matrix part, can improve slag penetration resistance and the heat-shock resistance of magnesia carbon brick, also is conducive to reduce the inclusion in the steel.
Can also add the Partial Antioxidation agent and stop that carbon element and non-oxidized substance are oxidized.Antioxidant can with oxygen reaction, stop up pore, make the matrix of magnesia carbon brick fine and close, the protection carbon element is not oxidized.The antioxidant such as aluminium powder, silica flour also can the part aquation produce keying action in bake process.The lime borate liquid that at high temperature can generate of calcium oxide and boracic antioxidant covers the magnesia carbon brick surface, intercepts carbon element and oxygen, improves antioxidant effect.
Beneficial effect of the present invention: compare original technology, the magnesia carbon brick that the present invention produces has been saved the energy and manpower, has reduced the discharging of pollutent, and its employed inorganic bonding agent in the production and application process can not volatilize toxic gas.
Embodiment
Following Example formulations ratio is by weight:
Embodiment 1
(1) preparation of lime white: get 3 parts of water and 1 part of unslaked lime or slaked lime and add in the container, leave standstill after the mixing above 48h, upper transparent solution is liming, and the emulsion of bottom is lime white;
(2) mixing: as to get 80 parts of magnesia, be divided into magnesia particle and magnesia powder; Add magnesia particle, 4 parts of lime whites, 0.5 part of silicon ash in the mixing roll, mixing 3min adds 19 parts of mixing 5min of graphite again, adds at last magnesia powder, 1 part of mesophase pitch powder and 0.5 part of norbide and mixes and obtain mixing pug;
(3) extrusion forming: put into press die mixing pug, the 250MPa extrusion forming becomes adobe;
(4) baking: the kiln road is put in the adobe after the moulding toasted, pass into reducing gas, the highest storing temperature is 250 ℃, and it is inorganic in conjunction with magnesia carbon brick namely to get product.
Products obtained therefrom compressive strength 〉=30MPa.
Embodiment 2
(1) preparation of lime white: get 3 parts of water and 1 part of unslaked lime or slaked lime and add in the container, leave standstill after the mixing above 48h, upper transparent solution is liming, and the emulsion of bottom is lime white;
(2) mixing: get 94 parts of magnesia, granularity is 6 ~ 0mm; Add 94 parts of magnesia, 5 parts of graphite, 1 part of N220 carbon black, 3 parts of lime whites, 0.3 part of silicon ash in the high speed mixing smelting machine, mixing 10min obtains mixing pug;
(3) extrusion forming: put into press die mixing pug, the 200MPa extrusion forming becomes adobe;
(4) baking: the kiln road is put in the adobe after the extrusion forming toasted, pass into reducing gas, the highest storing temperature is 190 ℃, and it is inorganic in conjunction with magnesia carbon brick namely to get product.
Products obtained therefrom compressive strength 〉=35MPa.
Embodiment 3
(1) preparation of lime white: get 3 parts of water and 1 part of unslaked lime or slaked lime and add in the container, leave standstill after the mixing above 48h, upper transparent solution is liming, and the emulsion of bottom is lime white;
(2) mixing: as to get 99 parts of magnesia, be divided into magnesia particle and magnesia powder; Add magnesia particle, 2.2 parts of lime whites, 0.1 part of silicon ash in the mixing roll, mixing 2min adds magnesia powder, 0.5 part of N220 carbon black, 0.5 part of mesophase pitch powder, 5 parts of carborundum powder mixing 20min again and obtains mixing pug;
(3) extrusion forming: put into press die mixing pug, the 150MPa extrusion forming becomes adobe;
(4) baking: the kiln road is put in the adobe after the extrusion forming toasted, pass into reducing gas, storing temperature is 250 ℃, and it is inorganic in conjunction with magnesia carbon brick namely to get product.
Claims (4)
1. inorganic preparation method in conjunction with magnesia carbon brick, it is characterized in that: formula rate is counted by weight, and step is as follows:
(1) preparation of lime white: get 2-4 part water and 1 part of unslaked lime or slaked lime and add in the container, leave standstill after the mixing above 48h, the upper strata clear solution is liming, and lower floor's emulsion is lime white;
(2) mixing: adding 80-99 part magnesia, 1-20 part carbon element, 2.2-4 part lime white, silicon ash 0.1-0.5 part mix in mixing machine and obtain mixing pug in the mixing roll;
(3) extrusion forming: put into press die mixing pug, the 150-250MPa extrusion forming obtains adobe;
(4) baking: the kiln road is put in adobe after the extrusion forming toasted, pass into reducing gas CO, storing temperature is 190-250 ℃, and it is inorganic in conjunction with magnesia carbon brick namely to get product.
2. described inorganic preparation method in conjunction with magnesia carbon brick according to claim 1 is characterized in that: add in mixing roll in the step (2) greater than 0 less than 5 parts antioxidant again;
Described antioxidant is: one or more in aluminium powder, silica flour, silicon carbide, norbide, silicon nitride or the Sialon.
3. described inorganic preparation method in conjunction with magnesia carbon brick according to claim 1, it is characterized in that: the ratio of lime is 25%-50% in the described lime white.
4. described inorganic preparation method in conjunction with magnesia carbon brick according to claim 1, it is characterized in that: described carbon element is one or more in graphite, carbon black and the asphalt powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110247063 CN102320849B (en) | 2011-08-24 | 2011-08-24 | Inorganically bonded magnesia-carbon brick |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110247063 CN102320849B (en) | 2011-08-24 | 2011-08-24 | Inorganically bonded magnesia-carbon brick |
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| Publication Number | Publication Date |
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| CN102320849A CN102320849A (en) | 2012-01-18 |
| CN102320849B true CN102320849B (en) | 2013-01-23 |
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| CN 201110247063 Active CN102320849B (en) | 2011-08-24 | 2011-08-24 | Inorganically bonded magnesia-carbon brick |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108472722B (en) * | 2015-12-16 | 2021-08-13 | 凯得力法国公司 | Castable refractory composition comprising zeolite-type microstructure and use thereof |
| CN115218672A (en) * | 2022-06-15 | 2022-10-21 | 江苏苏嘉集团新材料有限公司 | A kind of low carbon environmental protection magnesia carbon brick |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1412146A (en) * | 2001-10-16 | 2003-04-23 | 同济大学 | Mixed high-performance light concrete and its production process |
| CN100534954C (en) * | 2007-02-09 | 2009-09-02 | 江苏苏嘉集团新材料有限公司 | Non-oxide composite low-carbon magnesia-carbon brick |
| CN101654375B (en) * | 2009-09-24 | 2012-10-31 | 武汉钢铁(集团)公司 | Low-carbon magnesia carbon brick |
| CN101928480B (en) * | 2010-09-07 | 2012-05-23 | 武汉科技大学 | A kind of preparation method of aluminum-free anti-oxidation coating of magnesia carbon brick |
| CN102040391B (en) * | 2010-11-18 | 2012-12-19 | 江苏苏嘉集团新材料有限公司 | Boron iron powder-containing magnesia carbon product |
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