CN1168416A - Dispersed air-supplying element for bottom air supply of metallurgical furnace and its manufacture - Google Patents
Dispersed air-supplying element for bottom air supply of metallurgical furnace and its manufacture Download PDFInfo
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- CN1168416A CN1168416A CN 97101969 CN97101969A CN1168416A CN 1168416 A CN1168416 A CN 1168416A CN 97101969 CN97101969 CN 97101969 CN 97101969 A CN97101969 A CN 97101969A CN 1168416 A CN1168416 A CN 1168416A
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- mgo
- ventilated element
- refractory materials
- diffuse type
- core
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Abstract
The dispersed air-supplying element suitable for converter, electric furnace and various finers consists of core of refractory material and casing, and its refractory material has the composition in wt% of magnesia 80-95, aluminia 0.5-5, ferric oxide 0.4-5, boric acid 0.1-5, water glass 3-15, and resin 1-10, with the magnesia used having a size smaller than 4 mm. Its production processes include compounding the material for the core, mixing to homogeneous, filling the material into upper part of permeable element casing, high pressure forming and low temperature stoving for 20-150 hr. It has the merits of high density, good permeability, high erosion resistance and easy filling.
Description
The present invention mixes for metallurgical process bottom blowing gas mixing and uses the diffuse type ventilated element, is mainly used in the gas bottom blowing and supplying system of converter, electric furnace and various refining furnaces.
Existing metallurgical process adopts in diamond spar matter, high alumina matter, magnesia or fireclay refractory with various diffuse type ventilated elements and adds a certain amount of carbide (or not adding carbide) and other binding agents and agglutinant, prepare (" external converter top bottom compositing blowing steelmaking technology (four) by certain particle size and proportioning, in November, 1989 P122～130, " refractory materials ", 1972, supplementary issue P1-7), in pack into metal or the refractory materials shell, high-pressure molding.At high temperature sintering more than 1500 ℃, make the diffuse type ventilated element then.The principal feature that adds the diffuse type gas supply element of carbide is the void content height, good permeability, its main drawback is to cause ventilated element density low owing to add the burning mistake of carbide when pyroprocessing, hot strength is low, anti-erosion and anti-molten steel scouring are poor, and work-ing life is low, are generally less than 10 stoves, the complete processing complexity, the production cost height; The principal feature that does not add the diffuse type ventilated element of carbide is that density is higher, and hot strength is higher than the former, and its main drawback is that void content is lower, and ventilation property is relatively poor, and complete processing is complicated, the production cost height.
The object of the present invention is to provide a kind of bottom for metallurgical vessel air feed diffuse type ventilated element and manufacture method, this ventilated element is density height, hot strength height, good permeability not only, anti-erosion is good, easily fill up in the use, long service life and manufacture method are simple, cost is low, and use range is wide, can be used in the bottom blowing stirring system of various metallurgical furnaces such as converter, electric furnace and refining furnace.
The present invention adopts and does not add inflammable carbide, without pyroprocessing more than 1500 ℃, the prescription of composition proportion by adjusting refractory materials and binding agent, agglutinant improves the density and the ventilation property of diffuse type ventilated element, gain in strength, improve work-ing life, simplify production process, reduce production costs, overcome the shortcoming and defect of existing diffuse type ventilated element.
Diffuse type gas supply element of the present invention is made up of refractory materials core and shell, the concrete chemical ingredients of its refractory materials core " weight %) be: MgO:80～95%, Al
2O
30.5～5%, ferric oxide: 0.4～5%, H
3BO
30.1～5%, water glass: 3～15%, resin: 1～10%, wherein ferric oxide is meant FeO, Fe
2O
3, Fe
3O
4In any one or two kinds of above sums, resin is meant any one or two kinds of sums in Resins, epoxy or the resol, grain graininess＜4mm of used MgO.
The manufacture method of diffuse type gas supply element of the present invention is as follows:
The electric smelting MgO particle of selecting the suitable particle size proportioning for use adds a certain amount of Al as the ventilated element main body
2O
3, FeO
xWith boric acid as agglutinant,, press the chemical ingredients scope of refractory materials core and select appropriate proportioning as binding agent with the water glass of proper density, mix, pack into the top of air chamber in the diffuse type ventilated element shell, high-pressure forming, pressure is: 〉=500 kilograms per centimeter
2, in baking oven, in 50 °～300 ° temperature ranges, toasted 20～150 hours then, promptly make diffuse type gas supply element of the present invention.
Can reach following physicals: volume density 〉=2.6g/cm according to above-mentioned granularity requirements and the made diffuse type ventilated element of composition range
3, cold crushing strength 〉=50MPa, apparent porosity 〉=20%.
Compared with prior art, the present invention has following advantage:
(1) complete processing is simple, and production cost is low.
(2) the present invention is by adding Al
2O
3Make agglutinant, improved the hot strength of water glass, improved the anti-erosion of ventilated element, prolonged work-ing life as binding agent.
(3) the present invention adopts MgO as refractory material matrix, without high temperature sintering more than 1500 ℃, at low-temperature bake below 300 ℃, in use progressively carries out sintering then before only needing to use, and is easy to after the etch fill up, and has prolonged the work-ing life of ventilated element.
(4) the present invention can by adjusting the MgO granularity requirements, change the ventilation property of ventilated element according to metallurgical process processing requirement and metallurgical furnace size, the tolerance adjustable extent is big, adaptive faculty is strong, and use range is wide, can be used in the bottom blowing stirring system of various metallurgical furnaces such as converter, electric furnace and refining furnace.
Fig. 1 mixes with diffuse type ventilated element vertical part surface synoptic diagram for metallurgical furnace bottom blowing gas mixing of the present invention.
Fig. 2 is an A-A drawing in side sectional elevation among Fig. 1.
Among Fig. 1, Fig. 2,1 is the bottom inflow pipe, and 2 is the ventilated element shell, and 3 is wire or metal strip, and 4 is wire cloth or expanded metal, and 5 is the refractory materials core.
Embodiment
According to the chemical ingredients scope of refractory materials core of the present invention, 4 batches of diffuse type ventilated elements have been prepared.Concrete refractory materials core chemical ingredients sees Table 1.The complete processing system of 4 batches of ventilated elements sees Table 2, the physicals of 4 batches of ventilated element refractory materials cores is listed in table 3, it is on probation that the diffuse type ventilated element that four kinds of heterogeneity proportionings are made is installed in the converter furnace bottom, the result shows, the performance perameter of ventilated element satisfies service requirements fully, good permeability, and the tolerance regulation range is big, anti-slag etch performance is good, and mean etch speed is less than the 1.0mm/ stove.
The chemical ingredients (weight %) of the used refractory materials of table 1 embodiment
| The composition lot number | MgO | ????Al 2O 3 | Ferric oxide | Boric acid H 3BO 3 | Water glass | Phenolic resin |
| ????1 | ??93.5 | ????1 | ????1 | ????0.5 | ????3 | ????1 |
| ????2 | ??93 | ????0.5 | ????1 | ????1.0 | ????3 | ????1.5 |
| ????3 | ??94 | ????0.8 | ????0.4 | ????0.1 | ????3.1 | ????1.8 |
| ????4 | ??90 | ????1.5 | ????1.5 | ????0.5 | ????4 | ????2.5 |
Table 2 embodiment complete processing system
| Lot number | Pressure (kilograms per centimeter 2) | Baking | |
| Temperature (℃) | Time (h) | ||
| ????1 | ????550 | ????210 | ????40 |
| ????2 | ????600 | ????50 | ????50 |
| ????3 | ????558 | ????180 | ????100 |
| ????4 | ????700 | ????280 | ????80 |
The physicals of table 3 embodiment
| The performance lot number | Volume density (g/cm 3) | Cold crushing strength (MPa) | Apparent porosity (%) | The every stove of etch rates mm/ |
| ????1 | ????2.68 | ????68 | ????21.0 | ????0.91 |
| ????2 | ????2.70 | ????72 | ????20.8 | ????0.88 |
| ????3 | ????2.65 | ????58 | ????21.6 | ????0.92 |
| ????4 | ????2.80 | ????85 | ????20.5 | ????0.85 |
Claims (2)
1, a kind of bottom for metallurgical vessel air feed diffuse type ventilated element is made up of refractory materials core and shell, it is characterized in that: the chemical ingredients of described refractory materials core (weight %) is: MgO:80～95%, Al
2O
3: 0.5～5%, ferric oxide: 0.4～5%, H
3BO
30.1～5%, water glass: 3～15%, resin: 1～10%, wherein ferric oxide is meant FeO, Fe
2O
3, Fe
3O
4In any one or two kinds of above sums, resin is meant any one or two kinds of sums in Resins, epoxy or the resol, grain graininess＜4mm of used MgO.
2, the manufacture method of ventilated element according to claim 1, it is characterized in that: be ready to MgO by the requirement of MgO grain graininess, press the chemical ingredients scope of refractory materials core again and select appropriate proportioning, mix, pack into the top of diffuse type ventilated element shell air chamber, high-pressure molding, pressure are 〉=500 kilograms per centimeter
2, in baking oven, in 50～300 ℃ of temperature ranges, toasted 30～150 hours then, promptly make the diffuse type ventilated element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97101969 CN1168416A (en) | 1997-03-26 | 1997-03-26 | Dispersed air-supplying element for bottom air supply of metallurgical furnace and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97101969 CN1168416A (en) | 1997-03-26 | 1997-03-26 | Dispersed air-supplying element for bottom air supply of metallurgical furnace and its manufacture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1168416A true CN1168416A (en) | 1997-12-24 |
Family
ID=5166092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97101969 Pending CN1168416A (en) | 1997-03-26 | 1997-03-26 | Dispersed air-supplying element for bottom air supply of metallurgical furnace and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1168416A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101391773B (en) * | 2008-04-15 | 2011-01-12 | 南安市三晶阳光电力有限公司 | Purification method of dispersing gas guided in to metallic silicon |
| CN102408241A (en) * | 2010-09-23 | 2012-04-11 | 辽宁科技大学 | Low-creep periclase-spinelle heat storage material for air heating furnace and production method thereof |
| CN101497528B (en) * | 2009-03-18 | 2013-06-05 | 于景坤 | Preparation of magnesia air brick |
| CN104120281A (en) * | 2014-08-06 | 2014-10-29 | 辽宁伊菲科技股份有限公司 | Degassing device inlaid at bottom of casting ladle or in holding furnace |
-
1997
- 1997-03-26 CN CN 97101969 patent/CN1168416A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101391773B (en) * | 2008-04-15 | 2011-01-12 | 南安市三晶阳光电力有限公司 | Purification method of dispersing gas guided in to metallic silicon |
| CN101497528B (en) * | 2009-03-18 | 2013-06-05 | 于景坤 | Preparation of magnesia air brick |
| CN102408241A (en) * | 2010-09-23 | 2012-04-11 | 辽宁科技大学 | Low-creep periclase-spinelle heat storage material for air heating furnace and production method thereof |
| CN104120281A (en) * | 2014-08-06 | 2014-10-29 | 辽宁伊菲科技股份有限公司 | Degassing device inlaid at bottom of casting ladle or in holding furnace |
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