CN101353260B - Steel fibre enhanced fire resistant refractory castable of desulphurization hot-metal tank edge - Google Patents
Steel fibre enhanced fire resistant refractory castable of desulphurization hot-metal tank edge Download PDFInfo
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- CN101353260B CN101353260B CN2008100489760A CN200810048976A CN101353260B CN 101353260 B CN101353260 B CN 101353260B CN 2008100489760 A CN2008100489760 A CN 2008100489760A CN 200810048976 A CN200810048976 A CN 200810048976A CN 101353260 B CN101353260 B CN 101353260B
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- working lining
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- metal bottle
- desulfurization
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- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a steel fiber reinforced refractory castable for the edge of a desulfurization hot metal tank, which is made from the following raw materials with the weight percentages: 55-75% of a reclaimed material of a working lining of a desulfurization spray gun refractory material, 10-20% of high-alumina clinker, 5-10% of alumina cement, 3-7% of silica micropowder, 1-3% of reclaimed aluminum silicate fiber, 2-4% of reclaimed refractory steel fiber, 1-3% of Portland cement, 0.1-0.3% of sodium tripolyphosphate and 0.05-0.15% of calcium lignosulphonate. In the invention, the wasterefractory working lining material decomposed by the desulfurization spray gun is taken as the resource of the main raw material of the castable, and finally the steel fiber reinforced refractory castable for the edge of the desulfurization hot metal tank with low cost, convenient preparation and simple use and with the reclaimed material of the waste refractory material as the main raw material is obtained, which greatly improves the integrated overall performance and anti-mechanical damage performance of the working lining of the tank edge.
Description
Technical field
The present invention relates to a kind of desulfurization hot-metal bottle edge steel fibre enhanced fire resistant castable refractory, specifically a kind of refractory castable that is used for the pretreated iron ladle jar of desulfurizing iron along the integrated poured moulding of working lining belongs to the unshape refractory field.
Background technology
Along with constantly carrying out of desulfurizing iron, desulfurization hot-metal bottle jar mouth, jar edge and jar interior slag lining slagging scorification iron are serious gradually, cause the slack tank quality to increase, and move on the center of gravity, badly influence ironmaking, STEELMAKING PRODUCTION tissue and production safety; Simultaneously, because dry slag thing chill combines effect with the rivet of the hard and chill infiltration of slag condensation precipitate, it is very difficult to cause the dry slag thing to be removed.In the actual production, generally adopt the mode of flame cutting earlier the dry slag thing to be cut into fritter, adopt suspension hook to remove clinker again.This not only causes the deterioration of operating environment, and labour intensity is big, and the scarfing cinder activity duration is long, simultaneously, causes that also jar peels off with loosening along the big area of working lining refractory brick, causes desulfurization hot-metal bottle life-span weak point, turnover anxiety, refractory consumption to increase.Compare with the ladle that dry slag is even more serious, the use processing condition of desulfurization hot-metal bottle are better relatively, work-ing life is long more than ladle, the refractory consumption rate cost is also little, thereby, desulfurization hot-metal bottle is relatively low with the performance requriements of refractory materials, studies lessly targetedly, often selects commercially available common refractory materials to build by laying bricks or stones.Continuous popularization along with China's desulfurizing iron pretreatment technology, consider from the angle of effective reduction desulphurization cost, desulfurization hot-metal bottle dry slag thing is removed jar problem along the working lining badly broken that causes and has been evoked showing great attention to of relevant scholar, domestic how tame iron and steel enterprise has successively carried out the applied research of coating against binding slags or spray material at jar along refractory materials working lining surface, buffer action by antiseized slag blanket, reduce the bonding strength of dry slag thing and working lining, and obtained and reduced certain effect that the desulfurization hot-metal bottle adhesive is removed difficulty, but jar peels off with loosening still very serious along working lining refractory brick, needs all after each scarfing cinder is handled that jar is carried out the light maintenance maintenance along working lining and handles.This shows, strengthening jar a comprehensive integral performance and an anti-mechanical damage performance along working lining is to reduce the desulfurization hot-metal bottle jar along the damaged important means of safeguarding with light maintenance of working lining, for this reason, domestic priority has been carried out jar a development and an applied research along steel fiber enhancing mould material, and in actual production, obtained jar along working lining work-ing life and the synchronous excellent results of iron ladle overhaul life, for example: document " prolongs the technology of digester jar along work-ing life ", " Wuhan Iron and Steel Plant technology ", 2002,40 (3) have reported that steel fiber strengthens development and the effect of high alumina matter desulfurization hot-metal bottle jar along mould material, but the starting material of mould material are higher natural the burning till or synthetic material of price, thereby, mould material costs an arm and a leg, especially expensive heat-resistant steel fiber although addition only is about 2.5%, occupies very important ratio in the comprehensive cost of mould material, increase the refractory consumption rate cost of desulfurization hot-metal bottle, influenced the production and operation benefit of enterprise.
Summary of the invention
Technical problem to be solved by this invention is to solve the desulfurization hot-metal bottle jar along the comprehensive integral performance of working lining and anti-mechanical damage performance is low, the expensive problem of mould material.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention provides a kind of desulfurization hot-metal bottle edge steel fibre enhanced fire resistant castable refractory, and it is made up of following raw materials by weight percent: desulphurization spray gun refractory materials working lining reworked material, 55～75%; High alumina, 10～20%; Luminite cement, 5～10%; Silicon powder, 3～7%; The regeneration aluminum silicate fiber, 1～3%; The regeneration heat-resistant steel fiber, 2～4%; Silicate cement, 1～3%; Tripoly phosphate sodium STPP, 0.1～0.3%; Wooden calcium sulfonate, 0.05～0.15%.
In such scheme:
Described desulphurization spray gun refractory materials working lining reworked material by granularity be respectively 15～10mm, 10～5mm, 5～3mm, 3～1mm, 1～0.1 and＜six kinds of grain compositions of 0.1mm constitute, weight percent is respectively 12～18%, 10～16%, 8～12%, 9～13%, 10～16% and 3～5%.
Described desulphurization spray gun refractory materials working lining reworked material be depleted desulphurization spray gun working lining refractory materials through manually pick, fragmentation, screening, magnetic separation get.
Described high alumina is A1
20
3Weight percent content 〉=60%.By 1～0.1mm and＜two gratings of 0.088mm constitute, weight percent is respectively 2～9% and 8～13%.
Described regeneration aluminum silicate fiber is that the depleted aluminum silicate fiber is the staple fibre of 3～10mm through manually picking, pulverize the length that forms.
Described regeneration heat-resistant steel fiber is for the magnetic separation residue of discarded desulphurization spray gun working lining refractory materials after broken, screening sieves, manually picks, magnetic separation gets.
The present invention is according to the requirement of desulfurization hot-metal bottle service intermittent mode jar along the mould material thermal shock resistance, the discarded working lining refractory materials that disintegrates of desulphurization spray gun that selection is similarly service intermittent is the resource of mould material main raw material(s), and selecting industrial furnace depleted aluminum silicate fiber is the aluminum silicate fiber renewable resource.For the working lining refractory materials that discarded desulphurization spray gun disintegrates, take manually to pick, the means of fragmentation, screening, magnetic separation, obtain varigrained fire-resistant regeneration aggregate; By fine grinding, magnetic separation, obtain to require the fire-resistant regenerative powder of fineness to screen underflow; By to screening, the magnetic separation of magnetic separation residue in aggregate and the powder regenerative process and manually pick, obtain the regeneration heat-resistant steel fiber.For industrial furnace depleted aluminum silicate fiber, take the means manually picking, pulverize, making length is the regeneration aluminosilicate short fiber of 3～10mm.By the manipulation of regeneration mode of above-mentioned waste refractory materials, reduce the foreign matter content of reworked material, improve the reworked material usage ratio, reduce the mould material cost and use the discarded of refractory.In addition, adopt luminite cement, silicon powder, α-Al
20
3Be combined binder, to improve the intensity of mould material; Selecting tripoly phosphate sodium STPP, wooden calcium sulfonate is water reducer, dispersion agent, improves the workability of mould material; Consider that from the setting time and the construction period aspect that shorten mould material the selection silicate cement is a setting accelerator; Use processing condition and working lining cast thickness according to jar along mould material, carried out mould material aggregate critical size, grading of aggregate and mould material raw material ratio and optimization of preparation research; Final acquisition is a kind of to be main raw material(s), cheap, easy to prepare, the simple desulfurization hot-metal bottle edge steel fibre enhanced fire resistant castable refractory of use with the waste refractory materials reworked material.
Embodiment
Below in conjunction with specific embodiment the present invention is made detailed explanation.
Embodiment 1:
Prepare 2056 kilograms of desulfurization hot-metal bottle edge steel fibre enhanced fire resistant castable refractories: its raw material is formed and weight percent is: the discarded desulphurization spray gun refractory materials working lining reworked material 55% of manipulation of regeneration, high alumina 18%, luminite cement 10%, silicon powder 6.55%, regeneration aluminum silicate fiber 3%, regeneration heat-resistant steel fiber 4%, silicate cement 3%, tripoly phosphate sodium STPP 0.3%, wooden calcium sulfonate 0.15%.Wherein, discarded desulphurization spray gun refractory materials working lining reworked material by granularity be respectively 15～10mm, 10～5mm, 5～3mm, 3～1mm, 1～0.1 and＜six kinds of grain compositions of 0.1mm form, weight percent is respectively 16%, 14%, 11%, 11%, 14%, 4%, above-mentioned discarded desulphurization spray gun refractory materials working lining reworked material for discarded desulphurization spray gun working lining through manually pick, fragmentation, screening, magnetic separation acquisition; Al in the high alumina
2O
3Weight percent content 〉=60%, by granularity be respectively 1～0.1mm and＜two kinds of grain compositions of 0.088mm constitute, weight percent is respectively 2% and 10%; The magnetic separation residue that the heat-resistant steel fiber of wherein regenerating is a depleted desulphurization spray gun working lining after broken, screening sieves, manually picks, magnetic separation obtains.Above-mentioned raw materials by above-mentioned weight percent weighing, is stirred in the adding agitator, obtain required desulfurization hot-metal bottle edge steel fibre enhanced fire resistant castable refractory, and the pack packing.At 100 tons of blowing desulfurizations with the jar mouth of desulfurization hot-metal bottles, jar along the position, adopt mould material of the present invention and commercially available mould material to carry out the industrialness simultaneous test, test-results shows, do not carrying out under jar prerequisite that repair on the edge, adopting the desulfurization hot-metal bottle on mould material pouring can of the present invention edge than improving 30 stoves the work-ing life of the desulfurization hot-metal bottle on commercially available spray cast pouring can edge.
Embodiment 2:
Prepare 2056 kilograms of desulfurization hot-metal bottle edge steel fibre enhanced fire resistant castable refractories: its raw material is formed and weight percent is: the discarded desulphurization spray gun refractory materials working lining reworked material 75% of manipulation of regeneration, high alumina 10%, luminite cement 5%, silicon powder 3.85%, regeneration aluminum silicate fiber 3%, regeneration heat-resistant steel fiber 2%, silicate cement 1%, tripoly phosphate sodium STPP 0.1%, wooden calcium sulfonate 0.3%.Wherein, discarded desulphurization spray gun refractory materials working lining reworked material by granularity be respectively 15～10mm, 10～5mm, 5～3mm, 3～1mm, 1～0.1 and＜six kinds of grain compositions of 0.1mm form, weight percent is respectively 16%, 14%, 11%, 11%, 14%, 4%, above-mentioned discarded desulphurization spray gun refractory materials working lining reworked material be depleted desulphurization spray gun working lining through manually pick, fragmentation, screening, magnetic separation obtain; A1 in the high alumina
20
3Weight percent content 〉=60%, by granularity be respectively 1～0.1mm and＜two kinds of grain compositions of 0.088mm constitute, weight percent is respectively 5% and 13%; The magnetic separation residue that the heat-resistant steel fiber of wherein regenerating is a depleted desulphurization spray gun working lining after broken, screening sieves, manually picks, magnetic separation obtains.Above-mentioned raw materials by above-mentioned weight percent weighing, is stirred in the adding agitator, obtain required desulfurization hot-metal bottle edge steel fibre enhanced fire resistant castable refractory, and the pack packing.At 100 tons of blowing desulfurizations with the jar mouth of desulfurization hot-metal bottles, jar along the position, adopt mould material of the present invention and commercially available mould material to carry out the industrialness simultaneous test, test-results shows, do not carrying out under jar prerequisite that repair on the edge, adopting the desulfurization hot-metal bottle on mould material pouring can of the present invention edge than improving 30 stoves the work-ing life of the desulfurization hot-metal bottle on commercially available spray cast pouring can edge.
Embodiment 3:
Prepare 2056 kilograms of desulfurization hot-metal bottle edge steel fibre enhanced fire resistant castable refractories: its raw material is formed and weight percent is: the discarded desulphurization spray gun refractory materials working lining reworked material 70% of manipulation of regeneration, high alumina 14%, luminite cement 6%, silicon powder 3%, regeneration aluminum silicate fiber 2%, regeneration heat-resistant steel fiber 2.2%, silicate cement 2.5%, tripoly phosphate sodium STPP 0.2%, wooden calcium sulfonate 0.1%.Wherein, discarded desulphurization spray gun refractory materials working lining reworked material by granularity be respectively 15～10mm, 10～5mm, 5～3mm, 3～1mm, 1～0.1 and＜six kinds of grain compositions of 0.1mm form, weight percent is respectively 16%, 14%, 11%, 11%, 14%, 4%, above-mentioned discarded desulphurization spray gun refractory materials working lining reworked material be depleted desulphurization spray gun working lining through manually pick, fragmentation, screening, magnetic separation obtain; A1 in the high alumina
2O
3Weight percent content 〉=60%, by granularity be respectively 1～0.1mm and＜two kinds of grain compositions of 0.088mm constitute, weight percent is respectively 7% and 8%; The heat-resistant steel fiber of wherein regenerating is for the magnetic separation residue of discarded desulphurization spray gun working lining after broken, screening sieves, manually picks, magnetic separation obtains.Above-mentioned raw materials by above-mentioned weight percent weighing, is stirred in the adding agitator, obtain required desulfurization hot-metal bottle edge steel fibre enhanced fire resistant castable refractory, and the pack packing.At 100 tons of blowing desulfurizations with the jar mouth of desulfurization hot-metal bottles, jar along the position, adopt mould material of the present invention and commercially available mould material to carry out the industrialness simultaneous test, test-results shows, do not carrying out under jar prerequisite that repair on the edge, adopting the desulfurization hot-metal bottle on mould material pouring can of the present invention edge than improving 30 stoves the work-ing life of the desulfurization hot-metal bottle on commercially available spray cast pouring can edge.
Embodiment 4:
Prepare 2047 kilograms of desulfurization hot-metal bottle edge steel fibre enhanced fire resistant castable refractories: its raw material is formed and weight percent is: the discarded desulphurization spray gun refractory materials working lining reworked material 60% of manipulation of regeneration, high alumina 20%, luminite cement 7%, silicon powder 7%, regeneration aluminum silicate fiber 1%, regeneration heat-resistant steel fiber 3%, silicate cement 1.65%, tripoly phosphate sodium STPP 0.25%, wooden calcium sulfonate 0.1%; Wherein, discarded desulphurization spray gun refractory materials working lining reworked material by granularity be 15～10mm, 10～5mm, 5～3mm, 3～1mm, 1～0.1,＜six kinds of grain compositions of 0.1mm form, weight percent is respectively 14%, 12%, 9%, 10%, 11% and 4%, above-mentioned discarded desulphurization spray gun refractory materials working lining reworked material for discarded desulphurization spray gun working lining through manually pick, fragmentation, screening, magnetic separation acquisition; Wherein, Al in the high alumina
2O
3Weight percent content 〉=60%, by granularity be respectively 1～0.1mm and＜two kinds of grain compositions of 0.088mm constitute, weight percent is respectively 8% and 12%; The magnetic separation residue that the heat-resistant steel fiber of wherein regenerating is a depleted desulphurization spray gun working lining after broken, screening sieves, manually picks, magnetic separation obtains.Above-mentioned raw materials by above-mentioned weight percent weighing, is stirred in the adding agitator, obtain required desulfurization hot-metal bottle edge steel fibre enhanced fire resistant castable refractory, and the pack packing.At 100 tons of blowing desulfurizations with the jar mouth of desulfurization hot-metal bottles, jar along the position, adopt mould material of the present invention and commercially available mould material to carry out the industrialness simultaneous test, test-results shows, do not carrying out under jar prerequisite that repair on the edge, adopting the desulfurization hot-metal bottle on mould material pouring can of the present invention edge than improving 100 stoves the work-ing life of the desulfurization hot-metal bottle on commercially available spray cast pouring can edge.
The present invention has analyzed material formation, physical and chemical index and the use properties requirement of the desulfurization hot-metal bottle jar of present domestic production application along mould material, wherein, the domestic jar of formation along mould material is to be main raw material(s) with the high alumina, high-alumina cement, silicon powder, α-Al
20
3Be combined binder, heat-resistant steel fiber is a strongthener, and water reducer, dispersion agent, sintering mineralizer are main additive, and the organic or inorganic fiber is the anti-admixture that bursts apart.By desulfurization hot-metal bottle jar mouth, jar mouthful integrated poured, form the good jar of overall performance along working lining, by the erosion-resisting characteristics and the high-temperature behavior of high alumina in the working lining, improve anti-erosion, the antistripping ability of working lining, satisfy the high-temperature behavior of mould material; By combined binder and Application of Additives, improve bonding strength and workability under the condition of different temperatures of pouring into a mould working lining, application by the anti-admixture that bursts apart, satisfy the quick baking of cast working lining and the thermal shock resistance requirement of service intermittent, application by heat-resistant steel fiber, improve the globality of cast working lining, improve anti-fracture, the anti-mechanical damage ability of mould material.By different raw-material performance performances in the mould material, effectively avoided the problem a little less than brick jar low, poor, the anti-mechanical damage ability of working lining globality along working lining brickwork joint bonding strength, checked and jar removed the bricking serious obscission that causes, reached and prolong jar along working lining work-ing life, reduce maintenance cost, improve the purpose of desulfurization hot-metal bottle turnover rate along the dry slag thing.But actual use processing condition by desulfurization hot-metal bottle, the desulfurization hot-metal bottle jar is lower along refractory materials working lining use temperature, slag corrosion is lighter, thereby, physicochemical property for refractory materials is less demanding, yet, the jar of present domestic use all is good commercially available natural material or the synthetic materials of burning till of physicochemical property along the main raw material(s) of mould material, rise along with energy prices, cause the mould material material cost constantly soaring, simultaneously, taked to promote low sintering additive, though reached the desired result that improves bonding strength under the mould material use temperature condition, but deterioration the high-temperature behavior of mould material matrix, thereby limited the raw-material selection quality of mould material, further improved the material cost of mould material.In addition, iron and steel enterprise is as the consumption rich and influential family of refractory materials, there is every year the refractory materials after the different use of a large amount of kinds discarded, although waste refractory materials exists because dry slag, corrode the problem of the performance degradation that causes with infiltration, but by suitable regeneration means and rational waste refractory materials breed selection, can reduce the performance degradation degree of reworked material significantly, therefore, do not adopting sintering to promote under the condition of additive, the reworked material that employing makes suitable waste refractory materials manipulation of regeneration substitutes the main or part starting material of desulfurization hot-metal bottle jar along mould material, can satisfy of the requirement of desulfurization hot-metal bottle jar, reach the regeneration of waste refractory materials along the comprehensive use properties of mould material, the excellent results that reduces the mould material cost and increase the service life.
Desulfurization hot-metal bottle edge steel fibre enhanced fire resistant castable refractory of the present invention has following advantage:
1. desulfurization hot-metal bottle edge steel fibre enhanced fire resistant castable refractory preparation of the present invention is simple, and the starting material source is wide, and cost is low.
2. excellent property of the present invention can satisfy under the different use temperature conditions desulfurization hot-metal bottle jar along casting and use properties requirement.
3. desulfurization hot-metal bottle edge steel fibre enhanced fire resistant castable refractory of the present invention is a main raw material(s) with the waste refractory materials reworked material, has realized the comprehensive utilization purpose of waste refractory materials.
The present invention is not limited to above-mentioned preferred forms, and anyone should learn the structural changes of making under enlightenment of the present invention, and every have identical or close technical scheme with the present invention, all falls within protection scope of the present invention.
Claims (4)
1. a desulfurization hot-metal bottle edge steel fibre enhanced fire resistant castable refractory is made up of following raw materials by weight percent: desulphurization spray gun refractory materials working lining reworked material, 55～75%; High alumina, 10～20%; Luminite cement, 5～10%; Silicon powder, 3～7%; The regeneration aluminum silicate fiber, 1～3%; The regeneration heat-resistant steel fiber, 2～4%; Silicate cement, 1～3%; Tripoly phosphate sodium STPP, 0.1～0.3%; Wooden calcium sulfonate, 0.05～0.15%; Described desulphurization spray gun refractory materials working lining reworked material for discarded desulphurization spray gun working lining refractory materials through manually pick, fragmentation, screening, magnetic separation get; Described regeneration heat-resistant steel fiber is for the magnetic separation residue of discarded desulphurization spray gun working lining refractory materials after broken, screening sieves, manually picks, magnetic separation gets.
2. desulfurization hot-metal bottle edge steel fibre enhanced fire resistant castable refractory as claimed in claim 1, it is characterized in that described desulphurization spray gun refractory materials working lining reworked material by granularity be respectively 15～10mm, 10～5mm, 5～3mm, 3～1mm, 1～0.1 and＜six kinds of grain compositions of 0.1mm constitute, weight percent is respectively 12～18%, 10～16%, 8～12%, 9～13%, 10～16% and 3～5%.
3. desulfurization hot-metal bottle edge steel fibre enhanced fire resistant castable refractory as claimed in claim 1 is characterized in that described high alumina is Al
2O
3Weight percent content 〉=60%, by granularity be respectively 1～0.1mm and＜two kinds of grain compositions of 0.088mm constitute, weight percent is respectively 2～9% and 8～13%.
4. desulfurization hot-metal bottle edge steel fibre enhanced fire resistant castable refractory as claimed in claim 1 is characterized in that described regeneration aluminum silicate fiber is the staple fibre of 3～10mm for discarded aluminum silicate fiber through manually picking, pulverize the length that forms.
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| CN106673683B (en) * | 2017-01-06 | 2019-06-25 | 武汉科技大学 | Molten iron desulfuring spray gun fiber composite toughening castable refractory and preparation method thereof |
| CN107096913B (en) * | 2017-05-25 | 2019-06-18 | 武汉钢铁有限公司 | Hot-metal bottle dry slag cut off device and preparation method |
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