CN103570366B - Unburned brick hot-metal ladle formula and preparation process thereof - Google Patents
Unburned brick hot-metal ladle formula and preparation process thereof Download PDFInfo
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- CN103570366B CN103570366B CN201310304409.8A CN201310304409A CN103570366B CN 103570366 B CN103570366 B CN 103570366B CN 201310304409 A CN201310304409 A CN 201310304409A CN 103570366 B CN103570366 B CN 103570366B
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Abstract
The invention discloses an unburned brick hot-metal ladle formula and preparation process thereof, the unburned brick hot-metal ladle formula is characterized by comprising the following raw materials in mass percentage: 60-65% of aggregate of flint clay, 27-31% of matrix part and 5-9% of additive, the preparation process comprises the following steps: pre-mixing-grinding mullite and high-alumina micro powder in proportion of 1: 2-1: 2.5, and then adding calcining aluminum oxide powder, 1-95# crystalline flake graphite, silicon metal powder, silicon carbide micro powder, boron nitride powder and carbon-containing resin enhancer; blending according to the closest packing principle, mulling at constant temperature and high speed, using 3.5% of liquid phenolic resin as binding agent, die-filling and hydroforming, and drying in a shuttle-type dry kiln for 36 hours at 200-220 DEG.C after die-stripping. Compared with the prior art, the unburned brick hot-metal ladle formula is long in service life, safe and stable and low in cost.
Description
Technical field
The present invention relates to a kind of hot-metal ladle formula and technique, specifically a kind of flint clay that uses is as the green brick hot-metal ladle formula of aggregate and preparation technology thereof.
Background technology
Along with steel industry is low, iron and steel enterprise is reducing production cost by every means, thus take the smelting process of a series of cost efficiency, low silicon smelting is exactly an energy saving and cost lowering measure, by reducing the usage ratio of coke, reduce energy consumption, reducing ironmaking temperature, is a kind of production method of very effective cost declining.
But thereupon concerning the iron ladle bearing blast-melted transport task; the feature of hot metal containing low silicon is that molten iron viscosity reduces; resistance to material surface does not form slag glaze layer protective layer; iron accident is oozed in easy formation; the resistance to material of base iron tank liner is generally aluminum-silicon carbide brick, and main raw material is alumine aggregate and fine powder, carborundum powder, crystalline flake graphite, resol are raw material.Due to inner lining refractory material surface not easily dross, easily there is decortication because rapid heat cycle causes, fall block phenomenon in this brick, therefore also drop to more than 600 time by former more than 1000 times the work-ing life of iron ladle, and safety performance also significantly reduces.
Summary of the invention
For above deficiency, the object of the present invention is to provide a kind of green brick hot-metal ladle formula and preparation technology thereof, compared with prior art, it has life-span length, safety and stability, advantage that cost is low.
For achieving the above object, the technical program is as follows:
A kind of green brick hot-metal ladle formula, comprises the aggregate of flint clay, base portion, additive; Each constituent mass per-cent is as follows: flint clay 60-65%, base portion and additive part summation 35-40%.
Further, flint clay aggregate is 60-65%, base portion is 27-31%, additive 5-9%.
Further, described base portion is following substance mixture: high alumina fine powder, mullite, crystalline flake graphite, silicon carbide micro-powder, zirconia powder, aluminum oxide powder, andaluzite powder; Additive is metallic silicon power, boron nitride powder, carbon containing resin-oatmeal; Bonding agent is: liquid phenolic resin.
Further, described flint clay aggregate quality per-cent is 60-65%, the composition model of base portion and additive part and mass percent as follows: high alumina fine powder 5-7%, mullite 3-4%, crystalline flake graphite 5-7%, silicon carbide micro-powder 2-4%, zirconia powder 3-4%, aluminum oxide powder 2-3%, andaluzite powder 3-5%, metallic silicon power 1-2%, boron nitride powder 1-2%, carbon containing resin-oatmeal 1-2%; Bonding agent model and mass percent as follows: liquid phenolic resin 3.5%.
Further, the critical granularity that described aggregate is be 5mm, 5 ~ 3mm, 3 ~ 1mm, 1 ~ 0 mixture.The flint clay of three kinds of different granularities uses after preparing burden in proportion, and wherein 5 ~ 3mm mass ratio in aggregate accounts for 32%, and 3 ~ 1mm mass ratio in aggregate accounts for 46%, and 1 ~ 0mm mass ratio in aggregate accounts for 22%.
A kind of green brick iron ladle preparation technology, comprises the following steps:
A, by the mullite of 3-5 mass parts and high alumina fine powder in the ratio of 1:2 ~ 1:2.5 in advance prior to grinding 3-4 hour altogether in ball mill, wearing into fineness requirement is: 0.074mm tails over and is not more than 20%, 0.044mm tails over and is not more than 30%, make common abrasive dust, then the calcined oxide aluminium powder of 2-3 mass parts is added, the silicon carbide micro-powder of 2-4 mass parts, the andaluzite powder of 3-5 mass parts, the zirconia powder of 3-4 mass parts, the boron nitride powder of 1-2 mass parts, the metallic silicon power of 1-2 mass parts, grind 0.5-1 hour altogether: wearing into fineness requirement is: 0.074mm tails over and is not more than 15%, 0.044mm tails over and is not more than 25%, obtained premixed powder,
B, to prepare burden by closestpacking principle, first add flint clay aggregate 5 ~ 3mm, the 3 ~ 1mm of 60-65 mass parts, 1 ~ 0 and the crystalline flake graphite of 5-7 mass parts, low speed per minute 40-80 turns. mixing 2-3 minute, add the premixed powder in steps A, low speed mixing 2-3 minute, and then at temperature 25-40 DEG C, time length 9-12 minute, mass parts 3.5 liquid phenolic resin is adopted to make bonding agent, then die-filling shaped by fluid pressure;
After C, depanning, in 200-220 DEG C, 36 hours drying treatment in kiln, finally obtained flint clay-silicon carbide-carbon matter iron ladle green brick;
D, prepare iron ladle with the green brick of step C.
Principle of work of the present invention and working process as follows:
The flint clay silicon carbide carbon brick that the present invention is main raw material with high-quality flint clay, replace former aluminum-silicon carbide brick, to improve the thermal stability of the resistance to material of ladle lining, because the superfine flint clay of high-quality is heated, linear expansivity is low, use under rapid heat cycle environment, volume stability is better than bauxite chamotte; Alumine water-intake rate is generally about 3.5%, and high-quality flint clay water-intake rate is within 1.5%, and water-intake rate is low by more than 55%, and raw materials cost is also low by about 50%.
Advantage compares following 2 points:
1, flint clay linear expansivity is low, and water-intake rate is low, and the volume stability of resistance to rapid heat cycle is good, and slag penetration resistance can be comparatively strong, is applicable to low silicon ironmaking technology and produces;
2, cost reduces 30-35% compared with aluminum-silicon carbide brick, and work-ing life is suitable with it, and use procedure there will not be decortication, falls block phenomenon.
Embodiment
The correlation technique content do not addressed below all can adopt or use for reference prior art.
For the preparation of a formula for green brick iron ladle, it comprises following component: aggregate, base portion and additive.
Wherein aggregate adopts flint clay, preferred superfine flint clay.
Base portion and additive part are the composition of following material: high alumina fine powder, mullite, crystalline flake graphite, silicon carbide micro-powder, zirconia powder, andaluzite powder, aluminum oxide powder, metallic silicon power, boron nitride powder, carbon containing resin-oatmeal.
Wherein: the preferred low aluminum-containing mullite of mullite, crystalline flake graphite is-195# crystalline flake graphite preferably, the preferred 97# silicon carbide micro-powder of silicon carbide micro-powder.
Bonding agent adopts liquid phenolic resin.
Below be all mass parts:
Following methods is adopted by above-described embodiment to be prepared green brick iron ladle:
The preparation method of embodiment one:
A, by the low aluminum-containing mullite of 64 mass parts in embodiment and high-alumina fly in the ratio of 1:2.1 in advance prior to grinding 3.7 hours altogether in ball mill, make common abrasive dust, then calcined oxide aluminium powder, the silicon carbide micro-powder of corresponding mass part is added according to upper table, andaluzite powder, zirconia powder, boron nitride powder, metallic silicon power, grind 0.7 hour altogether, obtained premixed powder;
B, to prepare burden by closestpacking principle, flint clay aggregate 5 ~ 3mm, the 3 ~ 1mm of first corresponding mass part, 1 ~ 0 and the crystalline flake graphite of corresponding mass part, low speed mixing 2 minutes, add the premixed powder in steps A, low speed mixing 3 minutes, and then at temperature 37 DEG C, 11 minutes time length, mass parts 3.5 liquid phenolic resin is adopted to make bonding agent, then die-filling shaped by fluid pressure;
After C, depanning, in 205 DEG C, 36 hours drying treatment in kiln, finally obtained flint clay-silicon carbide-carbon matter iron ladle green brick;
D, prepare iron ladle with the green brick of step C.
The preparation method of embodiment two:
A, by the low aluminum-containing mullite of 60 mass parts in embodiment and high-alumina fly in the ratio of 1:2.5 in advance prior to grinding 4 hours altogether in ball mill, make common abrasive dust, then calcined oxide aluminium powder, the silicon carbide micro-powder of corresponding mass part is added according to upper table, andaluzite powder, zirconia powder, boron nitride powder, metallic silicon power, grind 1 hour altogether, obtained premixed powder;
B, to prepare burden by closestpacking principle, flint clay aggregate 5 ~ 3mm, the 3 ~ 1mm of first corresponding mass part, 1 ~ 0 and the crystalline flake graphite of corresponding mass part, low speed mixing 3 minutes, add the premixed powder in steps A, low speed mixing 3 minutes, and then at temperature 40 DEG C, 12 minutes time length, mass parts 3.5 liquid phenolic resin is adopted to make bonding agent, then die-filling shaped by fluid pressure;
After C, depanning, in 220 DEG C, 36 hours drying treatment in kiln, finally obtained flint clay-silicon carbide-carbon matter iron ladle green brick;
D, prepare iron ladle with the green brick of step C.
The preparation method of embodiment three:
A, by the low aluminum-containing mullite of 64 mass parts in embodiment and high-alumina fly in the ratio of 1:2.3 in advance prior to grinding 3.5 hours altogether in ball mill, make common abrasive dust, then calcined oxide aluminium powder, the silicon carbide micro-powder of corresponding mass part is added according to upper table, andaluzite powder, zirconia powder, boron nitride powder, metallic silicon power, grind 0.6 hour altogether, obtained premixed powder;
B, to prepare burden by closestpacking principle, flint clay aggregate 5 ~ 3mm, the 3 ~ 1mm of first corresponding mass part, 1 ~ 0 and the crystalline flake graphite of corresponding mass part, low speed mixing 2 minutes, add the premixed powder in steps A, low speed mixing 2 minutes, and then at temperature 25 DEG C, 9 minutes time length, mass parts 3.5 liquid phenolic resin is adopted to make bonding agent, then die-filling shaped by fluid pressure;
After C, depanning, in 200 DEG C, 36 hours drying treatment in kiln, finally obtained flint clay-silicon carbide-carbon matter iron ladle green brick;
D, prepare iron ladle with the green brick of step C.
The preparation method of embodiment four:
A, by the low aluminum-containing mullite of 63 mass parts in embodiment and high-alumina fly in the ratio of 1:2.1 in advance prior to grinding 3.8 hours altogether in ball mill, make common abrasive dust, then calcined oxide aluminium powder, the silicon carbide micro-powder of corresponding mass part is added according to upper table, andaluzite powder, zirconia powder, boron nitride powder, metallic silicon power, grind 0.8 hour altogether, obtained premixed powder;
B, to prepare burden by closestpacking principle, flint clay aggregate 5 ~ 3mm, the 3 ~ 1mm of first corresponding mass part, 1 ~ 0 and the crystalline flake graphite of corresponding mass part, low speed mixing 3 minutes, add the premixed powder in steps A, low speed mixing 2 minutes, and then at temperature 35 DEG C, 10 minutes time length, mass parts 3.5 liquid phenolic resin is adopted to make bonding agent, then die-filling shaped by fluid pressure;
After C, depanning, in 210 DEG C, 36 hours drying treatment in kiln, finally obtained flint clay-silicon carbide-carbon matter iron ladle green brick;
D, prepare iron ladle with the green brick of step C.
The preparation method of embodiment five:
A, by the low aluminum-containing mullite of 62 mass parts in embodiment and high-alumina fly in the ratio of 1:2.4 in advance prior to grinding 3.9 hours altogether in ball mill, make common abrasive dust, then calcined oxide aluminium powder, the silicon carbide micro-powder of corresponding mass part is added according to upper table, andaluzite powder, zirconia powder, boron nitride powder, metallic silicon power, grind 0.8 hour altogether, obtained premixed powder;
B, to prepare burden by closestpacking principle, flint clay aggregate 5 ~ 3mm, the 3 ~ 1mm of first corresponding mass part, 1 ~ 0 and the crystalline flake graphite of corresponding mass part, low speed mixing 3 minutes, add the premixed powder in steps A, low speed mixing 2-3 minute, and then at temperature 38 DEG C, 12 minutes time length, mass parts 3.5 liquid phenolic resin is adopted to make bonding agent, then die-filling shaped by fluid pressure;
After C, depanning, in 215 DEG C, 36 hours drying treatment in kiln, finally obtained flint clay-silicon carbide-carbon matter iron ladle green brick;
D, prepare iron ladle with the green brick of step C.
Test above embodiment 1-5, testing data is as follows:
1, through Comparison study: iron ladle shell is that steel plate makes, thickness is generally 20-25mm, this material heat-insulating property is better than other like product, under identical environment for use, identical building by laying bricks or stones use thickness condition, and comparatively aluminum/silicon carbide-carbon brick, iron ladle ladle bowl surface temperature on average low 20-25 DEG C, prove that this material has thermal conductivity low, heat-insulating property is better, reduces thermosteresis, save energy, the advantage that safety in utilization is good.
2, flint clay raw material market price is at 900-1100 yuan/ton, and special grade bauxite market value is at 1750-1850 yuan/ton, and the prices of raw and semifnished materials reduce about 50%, and cost reduces 30-35% compared with aluminum/silicon carbide-carbon brick, and market price competition is with the obvious advantage.
The above is only the preferred implementation of the application, those skilled in the art is understood or realizes the application.To be apparent to one skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from the spirit or scope of the application, can realize in other embodiments.Therefore, the application can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (3)
1. a green brick iron ladle, is characterized in that: comprise the aggregate of flint clay, base portion, additive; Each constituent mass per-cent is as follows: flint clay 60-65%, the composition model of base portion and additive part and mass percent as follows: high alumina fine powder 5-7%, mullite 3-4%, crystalline flake graphite 5-7%, silicon carbide micro-powder 2-4%, zirconia powder 3-4%, aluminum oxide powder 2-3%, andaluzite powder 3-5%, metallic silicon power 1-2%, boron nitride powder 1-2%, carbon containing resin-oatmeal 1-2%; Bonding agent model and mass percent as follows: liquid phenolic resin 3.5%.
2. according to the green brick iron ladle described in claim 1, it is characterized in that: the critical granularity of described aggregate is the mixture of 5mm, 5 ~ 3mm, 3 ~ 1mm, 1 ~ 0mm; The flint clay of three kinds of different granularities uses after preparing burden in proportion, and wherein 5 ~ 3mm mass ratio in aggregate accounts for 32%, and 3 ~ 1mm mass ratio in aggregate accounts for 46%, and 1 ~ 0mm mass ratio in aggregate accounts for 22%.
3. a green brick iron ladle preparation technology, is characterized in that comprising the following steps:
A, by the mullite of 3-5 mass parts and high alumina fine powder in 1: 2 ~ 1: 2.5 ratio in advance prior to grinding 3-4 hour altogether in ball mill, wearing into fineness requirement is: 0.074mm tails over and is not more than 20%, 0.044mm tails over and is not more than 30%, make common abrasive dust, then the calcined oxide aluminium powder of 2-3 mass parts is added, the silicon carbide micro-powder of 2-4 mass parts, the andaluzite powder of 3-5 mass parts, the zirconia powder of 3-4 mass parts, the boron nitride powder of 1-2 mass parts, the metallic silicon power of 1-2 mass parts, grind 0.5-1 hour altogether: wearing into fineness requirement is: 0.074mm tails over and is not more than 15%, 0.044mm tails over and is not more than 25%, obtained premixed powder,
B, to prepare burden by closestpacking principle, first add the crystalline flake graphite of the flint clay aggregate 5 ~ 3mm of 60-65 mass parts, 3 ~ 1mm, 1 ~ 0mm and 5-7 mass parts, low speed per minute 40-80 turns mixing 2-3 minute, add the premixed powder in steps A, low speed mixing 2-3 minute, then at temperature 25-40 DEG C, time length 9-12 minute, mass parts 3.5 liquid phenolic resin is adopted to make bonding agent, then die-filling shaped by fluid pressure;
After C, depanning, in 200-220 DEG C, 36 hours drying treatment in kiln, finally obtained flint clay-silicon carbide-carbonaceous iron ladle green brick;
D, prepare iron ladle with the green brick of C step.
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| CN201310304409.8A CN103570366B (en) | 2013-07-19 | 2013-07-19 | Unburned brick hot-metal ladle formula and preparation process thereof |
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|---|---|---|---|---|
| CN102603314A (en) * | 2012-02-22 | 2012-07-25 | 北京首钢耐材炉料有限公司 | Aluminum silicon carbide carbon brick for torpedo tank and preparation method thereof |
| CN103058670A (en) * | 2011-10-19 | 2013-04-24 | 贵阳联合高温材料有限公司 | Novel light roasting fireproof product used for flue-cured tobacco machine furnace |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103058670A (en) * | 2011-10-19 | 2013-04-24 | 贵阳联合高温材料有限公司 | Novel light roasting fireproof product used for flue-cured tobacco machine furnace |
| CN102603314A (en) * | 2012-02-22 | 2012-07-25 | 北京首钢耐材炉料有限公司 | Aluminum silicon carbide carbon brick for torpedo tank and preparation method thereof |
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Effective date of registration: 20150915 Address after: 271133 Shandong City, Laiwu City, the town of Xin Zhen Zhen Village Patentee after: Laiwu Jiulong refractory material factory Address before: 271133 Shandong City, Laiwu City, the town of Xin Zhen Zhen Village Patentee before: SHANDONG YINSHAN REFRACTORY MATERIALS CO., LTD. |
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Effective date of registration: 20170418 Address after: 271133 Shandong Province, Laiwu City Gangcheng District Yan Zhuang Zhen Tuan Village Patentee after: SHANDONG YINSHAN REFRACTORY MATERIALS CO., LTD. Address before: 271133 Shandong City, Laiwu City, the town of Xin Zhen Zhen Village Patentee before: Laiwu Jiulong refractory material factory |
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