CN1078189C - Low magnesium oxide heat-insulation materials and its production - Google Patents
Low magnesium oxide heat-insulation materials and its production Download PDFInfo
- Publication number
- CN1078189C CN1078189C CN96103294A CN96103294A CN1078189C CN 1078189 C CN1078189 C CN 1078189C CN 96103294 A CN96103294 A CN 96103294A CN 96103294 A CN96103294 A CN 96103294A CN 1078189 C CN1078189 C CN 1078189C
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- China
- Prior art keywords
- hour
- magnesium oxide
- heat
- temperature
- low magnesium
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- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 239000000395 magnesium oxide Substances 0.000 title claims abstract description 26
- 239000012774 insulation material Substances 0.000 title claims abstract description 17
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 239000000463 material Substances 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 239000007787 solid Substances 0.000 claims abstract description 8
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract description 7
- 229910000514 dolomite Inorganic materials 0.000 claims abstract description 7
- 239000010459 dolomite Substances 0.000 claims abstract description 7
- 239000003292 glue Substances 0.000 claims abstract description 7
- 239000002893 slag Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 3
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 241001062472 Stokellia anisodon Species 0.000 claims description 2
- 238000000748 compression moulding Methods 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 3
- 239000004615 ingredient Substances 0.000 abstract description 3
- 238000009413 insulation Methods 0.000 abstract description 3
- 239000011810 insulating material Substances 0.000 abstract 3
- 238000004079 fireproofing Methods 0.000 abstract 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 abstract 1
- 238000003723 Smelting Methods 0.000 abstract 1
- 238000007664 blowing Methods 0.000 abstract 1
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract 1
- 238000005272 metallurgy Methods 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 238000009749 continuous casting Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000004154 testing of material Methods 0.000 description 1
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Abstract
The present invention discloses low magnesium oxide heat-insulation materials and a productive method thereof, which is used for the fire proofing and heat insulation of the smelting industry or the building industry. The heat insulating materials are formed by that dolomite, deoxidizing slag from a pure oxygen top blowing converter, solid paper pulp and glue in No. 0 are mixed, pressed, formed and sintered. The heat insulating materials have the ingredients that SiO2 is from 2 to 3%, MgO is from 28 to 32%, C3O is from 35 to 42%, A12O3 is from 21 to 28%, and Fe2O3 is equal to or less than 2%. The performance of the heat insulating materials of the present invention can reach the indexes of similar products both in China and other countries, raw materials are rich and cheap, and therefore, the selling price of finished products is only about 5 % of imported products from other countries to China. The present invention which is used as heat insulating and fire proofing materials can be widely used for the metallurgy and building industry.
Description
The present invention relates to a kind of thermal insulation material that is used to smelt with the thermal insulation material, particularly a kind of low magnesium oxide of heat-insulating.
In steel-making and each production link of continuous casting, be unable to do without thermal insulation material.That uses at present has two kinds, and a kind of is silicious, and major ingredient is SiO
2This material harm workers ' health is eliminated gradually.Another kind is a magnesium thermal insulation board, major ingredient is MgO, particularly the heat-insulating shield of continuous casting tundish contains especially that the very high material of MgO makes, in the world with Britain Foseco company and Japanese GarNex company produce best, China Qinhuangdao refractory factory also can be produced this material in recent years.But because of the plate of this material is to be raw material with magnesia, thereby the cost height, raw material supply is also at full stretch.
The purpose of this invention is to provide a kind of excellent property and low magnesium oxide heat-insulation materials and production method thereof with low cost.
The object of the present invention is achieved like this: the composition of low magnesium oxide heat-insulation materials is, contains SiO
2: 2-3%, MgO:28-32%, CaO:35-42%, Al
2O
3: 21-28%, Fe
2O
3≤ 2%.Its preferred version is: contain SiO
2: 3%, MgO:32%, CaO:42%, Al
2O
3: 21%, Fe
2O
3: 2%.
Production method according to the low magnesium oxide heat-insulation materials of above-mentioned component content is:
A) adopt following raw material and weight percent prescription: ground dolomite: 84%, granularity 〉=500 orders; Slag 1% after the oxygen top-blown deoxidation, granularity 〉=500 orders; Solid paper pulp: 9%, granularity 〉=500 orders; No. 0 glue: 6%;
B) above-mentioned ground dolomite, slag, solid paper pulp were done mixed 35-40 minute, added No. 0 glue, mixed 30 minutes again;
C) above-mentioned mixed material is injected the mould that gives the system shape, by shaper compression moulding, pressure: 250--300kg/cm
2
D) from mould, take out and put into electric furnace and go out finished product by following heat-agglomerating:
I) time from the beginning to the 2nd hour, temperature at the uniform velocity is heated to 100 ℃ from 10 ℃ of normal temperature;
Ii) from the 2nd hour to the 3rd hour, temperature at the uniform velocity was heated to 290 ℃ from 100 ℃;
Iii) from the 3rd hour to the 4th hour, be incubated at 290 ℃;
Iv) from the 4th hour to the 6th hour, temperature at the uniform velocity dropped to 160 ℃ from 290 ℃;
V) from the 6th hour to the 7th hour, temperature at the uniform velocity drops to 50 ℃ from 160 ℃, naturally cools to normal temperature then.
The present invention compare with siliceous thermal insulation material have pollution-free, do not endanger the advantage of workers ' health, compare with the magnesium thermal insulation board material, its performance index reach external like product standard (seeing attached list), remarkable advantage is, the raw material of producing this low magnesium oxide heat-insulation materials is very abundant, and price is comparatively cheap, therefore, production cost reduces greatly.According to initial estimate, the finished product price of producing only is 5 percent of external imported product price.Subordinate list: low magnesium oxide heat-insulation materials and domestic and international same type of material index contrast table
| Britain Foseco company | Japan GarNex company | The fire-resistant factory in Qinhuangdao | Ministerial standard | Low magnesium oxide heat-insulation materials | |
| Volume density g/CM | 1.19～1.27 | 1.1～1.75 | 1.2～1.6 | 1.2～1.6 | 1.14 |
| Folding strength Kg/CM | 17～42 | 15～50 | 35～45 | ≥25 | 32.53 |
| Thermal conductivity W/MK | 0.25 | 0.34～0.43 | 0.35～0.4 | ≤0.35 | 0.29 |
| Refractoriness ℃ | 1730 | 1690 | 1690 | ≥16690 | 1710～1730 |
Annotate: the exhausted testing of materials result of low magnesium oxide is provided by refractory quality supervision inspection center of Luoyang Ministry of Metallurgical Industry.
Elaborate below in conjunction with drawings and Examples:
Accompanying drawing is production method d) step t-℃ of heating curve.
The contriver is through repetition test, and the low magnesium oxide heat-insulation materials that draws following finished product content can reach the similar products at home and abroad performance index.That is: SiO
2: 2--3%, MgO:28--32%, CaO:35--42%, Al
2O
3: 21--28%, Fe
2O
3≤ 2%.Its preferred version is: SiO
2: 3%, MgO:32%, CaO:42%, Al
2O
3: 21%, Fe
2O
3: 2%.From theory and practice, Al
2O
3, MgO, these materials of CaO refractoriness all higher, and at high temperature performance is more stable, if reasonable ratio, promptly the new dot matrix crystalline network that constitutes under microcosmic with these three kinds of materials can reduce hot transmission form-conduction, radiation, convection current effectively.Therefore possessed above-mentioned premium properties.
Be that example illustrates its production method with above-mentioned preferred component content scheme below.
A) composition of raw materials: ground dolomite: 84%, the slag after the oxygen top-blown deoxidation: 1%, solid paper pulp: 9%, above raw material all requires granularity 〉=500 orders.No. 0 glue: 6%.
B) with above-mentioned ground dolomite, slag, solid paper pulp do to mix in mixer contained container in 40 minutes, add No. 0 glue manual mixing after, poured the mixer remix into 30 minutes.
C) above-mentioned mixed material (has the mould that gives the system shape) and is pressed into solid shapes such as smooth plate or curved slab on shaper, and pressure is: 250--300Kg/cm
2
D) sintering: the plate of taking-up moulding or the work in-process of other shape are put into cabinet-type electric furnace and are gone out finished product by the t-℃ of heating curve sintering that accompanying drawing provides.
Claims (3)
1, a kind of low magnesium oxide heat-insulation materials that is used to smelt or build refractory heat-insulating, it is characterized in that: composition contains SiO
2: 2-3%, MgO:28-32%, CaO:35-42%, Al
2O
3: 21-28%, Fe
2O
3:≤2%.
2, low magnesium oxide heat-insulation materials according to claim 1, it is characterized in that: composition contains: SiO
2: 3%, MgO:32%, CaO:42%, Al
2O
3: 21%, Fe
2O
3: 2%.
3, the production method of claim 1 or 2 described low magnesium oxide heat-insulation materials is characterized in that:
A) adopt following raw material and weight percent prescription: ground dolomite: 84%, granularity 〉=500 orders; Slag after the oxygen top-blown deoxidation: 1%, granularity 〉=500 orders; Solid paper pulp: 9%, granularity 〉=500 orders; No. 0 glue: 6%;
B) above-mentioned ground dolomite, slag, solid paper pulp were done mixed 35-40 minute, added No. 0 glue, mixed 30 minutes again;
C) above-mentioned mixed material is injected the mould that gives the system shape, by shaper compression moulding, pressure: 250--300kg/cm
2
D) from mould, take out put into electric furnace by the following method heat-agglomerating go out finished product:
I) time from the beginning to the 2nd hour, temperature at the uniform velocity is heated to 100 ℃ from 10 ℃ of normal temperature;
Ii) from the 2nd hour to the 3rd hour, temperature at the uniform velocity was heated to 290 ℃ from 100 ℃;
Iii) from the 3rd hour to the 4th hour, be incubated at 290 ℃;
Iv) from the 4th hour to the 6th hour, temperature at the uniform velocity dropped to 160 ℃ from 290 ℃;
V) from the 6th hour to the 7th hour, temperature at the uniform velocity drops to 50 ℃ from 160 ℃, naturally cools to normal temperature then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96103294A CN1078189C (en) | 1996-03-18 | 1996-03-18 | Low magnesium oxide heat-insulation materials and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96103294A CN1078189C (en) | 1996-03-18 | 1996-03-18 | Low magnesium oxide heat-insulation materials and its production |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1136025A CN1136025A (en) | 1996-11-20 |
| CN1078189C true CN1078189C (en) | 2002-01-23 |
Family
ID=5117963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96103294A Expired - Fee Related CN1078189C (en) | 1996-03-18 | 1996-03-18 | Low magnesium oxide heat-insulation materials and its production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1078189C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100347392C (en) * | 2004-12-17 | 2007-11-07 | 黄坤岳 | Warm floor |
| CN100462334C (en) * | 2005-12-27 | 2009-02-18 | 河南省耕生耐火材料有限公司 | Light thermal insulation fire-resistant pouring material by blast furnace slag and preparation process thereof |
| CN101302114B (en) * | 2008-06-23 | 2011-01-19 | 重庆钢铁(集团)有限责任公司 | Ladle heat-insulating layer unshaped heat insulation coating and use method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87104543A (en) * | 1986-07-31 | 1988-02-17 | 通用电气公司 | Thermal insulation material consisting of precipitated silica and fly ash |
| CN1058949A (en) * | 1991-07-29 | 1992-02-26 | 鞍山钢铁公司 | Magnesium heat insulation board and manufacturing method thereof |
| CN1094433A (en) * | 1993-04-24 | 1994-11-02 | 刘永文 | Silicon-magnesium thermal insulation refractory material and production technique |
| CN1098393A (en) * | 1993-08-05 | 1995-02-08 | 吴英华 | Fly ash foamed light heat-insulating material and preparation method thereof |
-
1996
- 1996-03-18 CN CN96103294A patent/CN1078189C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87104543A (en) * | 1986-07-31 | 1988-02-17 | 通用电气公司 | Thermal insulation material consisting of precipitated silica and fly ash |
| CN1058949A (en) * | 1991-07-29 | 1992-02-26 | 鞍山钢铁公司 | Magnesium heat insulation board and manufacturing method thereof |
| CN1094433A (en) * | 1993-04-24 | 1994-11-02 | 刘永文 | Silicon-magnesium thermal insulation refractory material and production technique |
| CN1098393A (en) * | 1993-08-05 | 1995-02-08 | 吴英华 | Fly ash foamed light heat-insulating material and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1136025A (en) | 1996-11-20 |
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| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |