CN103539467B - Mechanically-pressed carbon-free corundum spinel ladle brick as well as preparation method thereof - Google Patents
Mechanically-pressed carbon-free corundum spinel ladle brick as well as preparation method thereof Download PDFInfo
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- CN103539467B CN103539467B CN201310483743.4A CN201310483743A CN103539467B CN 103539467 B CN103539467 B CN 103539467B CN 201310483743 A CN201310483743 A CN 201310483743A CN 103539467 B CN103539467 B CN 103539467B
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Abstract
The invention discloses a mechanically-pressed carbon-free corundum spinel ladle brick. The mechanically-pressed carbon-free corundum spinel ladle brick comprises the following components in percentage by weight: 30%-50% of plate-shaped corundum particles, 10%-20% of high-purity aluminum-rich spinel particles, 10%-20% of plate-shaped corundum fine powder, 1%-9% of large crystallized magnesia fine powder, 5%-15% of high-purity aluminum-rich spinel fine powder, 1%-10% of high-purity silicon micro powder, 2%-10% of imported multimodal alpha-Al2O3 micro powder, 1%-4% of metal silicon and a bonding agent which is composed of 1%-5% of polyphosphate and 1%-3% of polysaccharide. The mechanically-pressed carbon-free corundum spinel ladle brick disclosed by the invention adopts an organic-inorganic compound combining system, is wet-milled and mixed under high pressure, formed under high pressure, high in density, good in thermal stability under high temperature, and resistant to molten steel and slag, and does not pollute the molten steel; moreover, production efficiency can be greatly improved, and therefore, the mechanically-pressed carbon-free corundum spinel ladle brick can be extensively applied to various ladles, especially refined low-carbon steel and ultralow-carbon ladles.
Description
Technical field
The present invention relates to a kind of refractory materials, particularly relate to a kind of machine and press carbon-free corundum spinelle ladle brick and preparation method thereof.
Background technology
Before and after the eighties in 20th century, carbon containing refractory use in smelting iron and steel furnace lining obtains immense success.Carbonaceous article has good anti-slag penetration and erosion performance, therefore at present the different class of the many employings of ladle do not burn magnesia carbon brick and magnesia-alumina-carbon brick.In decades, carbon containing refractory plays an important role in process for making always.But, along with the fast development of national economy, the market demands of industry to the Clean Steel such as high-quality, special steel such as automobile, household electrical appliances, high ferro, oil pipeline are increasing, and steel industry enterprise of China, also along with the change of the market requirement is adjusted the product mix, develops the smelting of high-quality steel.The resistance to material of the external refining being representative with ladle lining has very important impact to steel quality, in smelting low carbon fine steel grade technique, require that the use as far as possible reducing carbon containing refractory is to molten steel carbon drop adverse effect, there is the problem to molten steel recarburization in carbonaceous article, and the problem such as in the ladle to cause because of thermal conductivity, molten steel temperature drop is fast, ladle skin temperature is high, in the urgent need to the high-quality refractory material that and anti-erosion pollution-free to molten steel, life-span are high.At present, in order to reduce the impact of carbon content on Cleanliness of Molten Steel, exploitation has low-carbon (LC) refractory brick and carbon-free ladle brick respectively.The production decision of low-carbon (LC) refractory brick, resol is adopted to make bonding agent, add a small amount of graphite, add simultaneously a large amount of metal oxidation resistance agent to ensure resin and graphite not oxidized, this kind of coupling system can't eliminate the pollution of carbon to the high added value such as ultra low-carbon steel, silicon steel molten steel on the one hand, in addition, owing to adding a large amount of metal oxidation resistance agent, production cost is very high, simultaneously, the ceramic structure formed after antioxidant oxidation, has very large restriction to the resistance to flaking of goods use procedure.And the carbon-free ladle brick used now, it is then the production technique adopting cast preformed bricks, the scheme of cast preformed bricks utilizes aluminous cement or micro mist aquation as coupling system, stirring after vibration is shaping, and can only produce several pieces, maintenance is the demoulding after several hours at every turn, just next batch can be produced, production efficiency is lower, and coupling system is by the impact of temperature and humidity, and product properties fluctuation ratio is larger.
Summary of the invention
Carbon-free corundum spinelle ladle brick pressed by the machine that problem to be solved by this invention is to provide a kind of novel coupling system, this lining brick does not in use have carbon source, not to molten steel recarburization, there is erosion performance and the thermal shock resistance of good opposing molten steel and slag, thus meet the production of Clean Steel and ultra low-carbon steel.Invention also provides the preparation method of this brick, which overcome the deficiency that current carbon-free steel ladle pouring preformed bricks is produced and used, production efficiency is high and can ensure the stability of product properties.
Carbon-free corundum spinelle ladle brick pressed by machine of the present invention, its compositions in weight percentage proportioning is as follows: plate diamond spar particle 30 ~ 50%, high-purity aluminium riched spinel particle 10 ~ 20%, plate diamond spar fine powder 10 ~ 20%, large crystallization magnesia powder 1 ~ 9%, high-purity aluminium riched spinel fine powder 5 ~ 15%, high purity silica powder 1 ~ 10%, import multimodal α-Al
2o
3micro mist 2 ~ 10%, Pure Silicon Metal 1 ~ 4%, bonding agent: poly-phosphate 1 ~ 5%, glycan 1 ~ 3%.
The preparation method of carbon-free corundum spinelle ladle brick pressed by machine of the present invention, presses the weight percent of carbon-free corundum spinelle ladle brick component to carry out proportioning by machine, first by plate diamond spar powder, large crystallization magnesia powder, high-purity spinel, α-Al
2o
3micro mist, silicon powder, metallic silicon power mix, and make common abrasive dust; When producing, first plate diamond spar particle and high-purity spinel particle are dry mixed 2 ~ 3 minutes in the large-scale edge runner-wet mill of said components ratio, add bonding agent poly-phosphate liquid and glycan wet mixing 5-8 minute respectively, finally add all mixing of abrasive dust altogether discharging after 20 ~ 30 minutes, then friction press compression moulding is used, thermal treatment, kiln discharge is chosen, and obtains described carbon-free corundum spinelle brick.
Wherein, mixing is mixing with 1500 type edge runner-wet mills, and shaping is carry out on 630 tons or 1000 tons of friction presses; Drying needs thermal treatment more than 48 hours: wherein entering kilneye temperature must not higher than 50 DEG C, baking time more than 8 hours, 110 DEG C of baking times more than 12 hours, 200 ~ 250 DEG C of baking times more than 12 hours, 250 ~ 350 DEG C of baking times more than 16 hours.
The invention has the beneficial effects as follows: 1, by the coupling system of the organic and inorganic complexity of selecting new junction agent glycan class and poly-phosphate to be formed, mixing by high pressure edge runner-wet mill, effectively improve the idiosome intensity of product molding, the decomposition of glycan class low temperature about 300 DEG C is abundant in addition, residual charcoal is little, significantly reduce than remaining of carbonaceous article resol class charcoal, can not molten steel be polluted; 2, the introducing of high-purity aluminium riched spinel particle and micro mist, can be good at absorbing and dissipation elastic strain energy in goods use, relief of thermal stress, to the destruction of material, is improved the thermal shock resistance of carbon-free corundum spinelle ladle brick, is improved its antistrip performance; 3, silicon powder and multimodal α-Al is added
2o
3micro mist, utilizes it at high temperature to form the structure such as peridotites, spinel with matrix magnesium component, alleviates the stress organizing thermal expansion to produce, and improves heat-shock resistance and the resistance to flaking of material; 4, employing machine pressure mode produces carbon-free ladle brick, and production efficiency significantly improves, and within 8 hours, can produce 400-500 block, also without the demoulding, alleviates artificial labour intensity.
Accompanying drawing explanation
Fig. 1 is the schema of preparation method of the present invention.
Embodiment
Carbon-free corundum spinelle ladle brick pressed by machine of the present invention, its compositions in weight percentage proportioning is as follows: plate diamond spar particle 30 ~ 50%, high-purity aluminium riched spinel particle 10 ~ 20%, plate diamond spar fine powder 10 ~ 20%, large crystallization magnesia powder 1 ~ 9%, high-purity aluminium riched spinel fine powder 5 ~ 15%, high purity silica powder 1 ~ 10%, import multimodal α-Al
2o
3micro mist 2 ~ 10%, Pure Silicon Metal 1 ~ 4%, bonding agent: poly-phosphate 1 ~ 5%, glycan 1 ~ 3%.
Wherein, the grade of plate diamond spar particle have three kinds: 5 ~ 3mm, 3 ~ 1mm, 1 ~ 0mm; The grade of plate diamond spar fine powder is 320 orders, 200 orders, and the mass percent of its chemical composition is: Al
2o
3>=99.0%, SiO
2≤ 0.15%, Fe
2o
3≤ 0.05%, Na
2o+K
2o≤0.5%.
The grade of high-purity aluminium riched spinel particle is 1 ~ 0.5mm, 0.5 ~ 0mm, and the grade of high-purity aluminium riched spinel fine powder is for being less than 5 μ, and the mass percent of its chemical composition is: Al
2o
3>=78.0%, MgO>=21.0%, CaO≤0.3%, SiO
2≤ 0.2%, Fe
2o
3≤ 0.2%.
The grade of large crystallization magnesia powder is 200 orders, and the mass percent of its chemical composition is: MgO>=98.5%, CaO≤0.8%, SiO
2≤ 0.4%.
Silicon powder grade is≤3 μm, and the component comprised and weight percent are: SiO
2>=95%, Na
2o+K
2o≤0.2%, Fe
2o
3≤ 1.2%, Al
2o
3>=1.2%.
Import multimodal α-Al
2o
3micro mist grade is≤1 μm, and the component comprised and weight percent are: Al
2o
3>=99.0%, SiO
2≤ 0.12%, Na
2o+K
2o≤0.2%.
Pure Silicon Metal grade is≤500 orders, and the component comprised and weight percent are: SiO
2>=99.2%, Ca≤0.3%, Fe≤0.6%.
Poly-phosphate in bonding agent: total phosphate (P
2o
5meter) content>=68.0 ~ 65.0%, nonactive phosphoric acid salt is (with P
2o
5meter) content≤10.0%, water insoluble matter content≤0.15%, iron (Fe) content≤0.20 %, pH (10g/L) 5.8 ~ 7.0 solvabilities are qualified, appearance white powdery or granular; The appearance white of glycan or faint yellow blocks of solid in bonding agent, taste are sweet, DE value>=90, pH value: 4.0-6.0, solid substance:>=80%.
The embodiment of the present invention adopt the grain type of batching and per-cent as shown in the table:
Machine of the present invention presses the preparation method of carbon-free corundum spinelle ladle brick as shown in Figure 1, and mixing equipment is high pressure edge runner-wet mill.First add granulated aggregate after start and be dry mixed 2-3 minute, then add bonding agent poly-phosphate liquid and glycan wet mixing 5-8 minute, finally add all altogether abrasive dusts mix 30 minutes after discharging.Work in-process are shaping on 1000 tons of brick pressing machines.Forming operation will be observed corner and be taken off material, and first light rear heavy principle operates.Then dry heat process more than 48 hours, wherein entering kilneye temperature must not higher than 50 DEG C, baking time more than 8 hours, 110 DEG C of baking times more than 16 hours, 200 ~ 350 DEG C of baking times more than 24 hours.
The main physical and chemical index of the lining brick obtained by the method for the invention is as follows: Al
2o
3>=85%, MgO>=4.5%, 350 DEG C are dried rear volume density>=3.18g/cm3, apparent porosity (350 DEG C × 24h)≤15%, compressive strength (350 DEG C × 24h)>=60MPa, Linear change rate (1600 DEG C × 3h) 0 ~ 1.3%.This product is on probation in 70 tons of refining ladle, work-ing life >=110 times, in use good stability.
Machine of the present invention presses carbon-free corundum spinelle ladle brick to adopt Organic-inorganic composite coupling system, high pressure is wet grinds mixing, high-pressure molding, density is high, at high temperature the erosion of Heat stability is good, resistance to molten steel and slag, does not pollute molten steel, and production efficiency can significantly improve, various ladle can be widely used in, especially concise soft steel and ultra low-carbon steel ladle.
Claims (10)
1. carbon-free corundum spinelle ladle brick pressed by machine, it is characterized in that: its compositions in weight percentage proportioning is as follows: plate diamond spar particle 30 ~ 50%, high-purity aluminium riched spinel particle 10 ~ 20%, plate diamond spar fine powder 10 ~ 20%, large crystallization magnesia powder 1 ~ 9%, high-purity aluminium riched spinel fine powder 5 ~ 15%, high purity silica powder 1 ~ 10%, import multimodal α-Al
2o
3micro mist 2 ~ 10%, Pure Silicon Metal 1 ~ 4%, bonding agent: poly-phosphate 1 ~ 5%, glycan 1 ~ 3%.
2. ladle brick according to claim 1, is characterized in that: the grade of plate diamond spar particle has three kinds: 5 ~ 3mm, 3 ~ 1mm, 1 ~ 0mm; The grade of plate diamond spar fine powder is 320 orders, 200 orders, and the mass percent of its chemical composition is: Al
2o
3>=99.0%, SiO
2≤ 0.15%, Fe
2o
3≤ 0.05%, Na
2o+K
2o≤0.5%.
3. ladle brick according to claim 1, is characterized in that: the grade of high-purity aluminium riched spinel particle is 1 ~ 0.5mm, 0.5 ~ 0mm, and the grade of high-purity aluminium riched spinel fine powder is for being less than 5 μm, and the mass percent of its chemical composition is: Al
2o
3>=78.0%, MgO>=21.0%, CaO≤0.3%, SiO
2≤ 0.2%, Fe
2o
3≤ 0.2%.
4. ladle brick according to claim 1, is characterized in that: the grade of large crystallization magnesia powder is 200 orders, and the mass percent of its chemical composition is: MgO>=98.5%, CaO≤0.8%, SiO
2≤ 0.4%.
5. ladle brick according to claim 1, is characterized in that: silicon powder grade is≤3 μm, and the component comprised and weight percent are: SiO
2>=95%, Na
2o+K
2o≤0.2%, Fe
2o
3≤ 1.2%, Al
2o
3>=1.2%.
6. ladle brick according to claim 1, is characterized in that: import multimodal α-Al
2o
3micro mist grade is≤1 μm, and the component comprised and weight percent are: Al
2o
3>=99.0%, SiO
2≤ 0.12%, Na
2o+K
2o≤0.2%.
7. ladle brick according to claim 1, is characterized in that: Pure Silicon Metal grade is≤500 orders, and the component comprised and weight percent are: Si >=99.2%, Ca≤0.3%, Fe≤0.6%.
8. ladle brick according to claim 1, is characterized in that: the total phosphate (P of poly-phosphate in bonding agent
2o
5meter) content is 68.0 ~ 65.0%, nonactive phosphoric acid salt is (with P
2o
5meter) content≤10.0%, water insoluble matter content≤0.15%, iron (Fe) content≤0.20%, pH5.8 ~ 7.0 solvability is qualified, appearance white powdery or granular; In bonding agent, glycan is that appearance white or faint yellow blocks of solid, taste are sweet, DE value>=90, pH value: 4.0-6.0, solid substance:>=80%.
9. the preparation method of carbon-free corundum spinelle ladle brick pressed by the machine described in the arbitrary claim of claim 1-8, it is characterized in that: press the weight percent of carbon-free corundum spinelle ladle brick component to carry out proportioning by machine according to claim 1, first by plate diamond spar fine powder, large crystallization magnesia powder, high-purity aluminium riched spinel fine powder, α-Al
2o
3micro mist, silicon powder, metallic silicon power mix, and make common abrasive dust; When producing, first plate diamond spar particle and high-purity aluminium riched spinel particle are dry mixed 2 ~ 3 minutes in the large-scale edge runner-wet mill of said components ratio, add bonding agent poly-phosphate liquid and glycan wet mixing 5-8 minute respectively, finally add all mixing of abrasive dust altogether discharging after 20 ~ 30 minutes, then friction press compression moulding is used, thermal treatment, kiln discharge is chosen, and obtains described machine and presses carbon-free corundum spinelle ladle brick.
10. preparation method according to claim 9, is characterized in that: mixing is mixing with 1500 type edge runner-wet mills, and shaping is carry out on 630 tons or 1000 tons of friction presses; Drying needs thermal treatment more than 48 hours: wherein entering kilneye temperature must not higher than 50 DEG C, baking time more than 8 hours, 110 DEG C of baking times more than 12 hours, 200 ~ 250 DEG C of baking times more than 12 hours, 250 ~ 350 DEG C of baking times more than 16 hours.
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| CN201310483743.4A CN103539467B (en) | 2013-10-16 | 2013-10-16 | Mechanically-pressed carbon-free corundum spinel ladle brick as well as preparation method thereof |
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| CN103539467A CN103539467A (en) | 2014-01-29 |
| CN103539467B true CN103539467B (en) | 2015-06-17 |
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| CN103992126B (en) * | 2014-05-30 | 2015-07-15 | 浙江自立股份有限公司 | Method for preparing tabular corundum brick for working lining of carbon-free steel ladle |
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| CN105272316A (en) * | 2015-11-17 | 2016-01-27 | 攀枝花钢城集团协力有限公司 | Spinel ladle brick and preparation method thereof |
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| CN106810218A (en) * | 2016-12-28 | 2017-06-09 | 江苏苏嘉集团新材料有限公司 | Carbon-free ladle brick of high intensity and preparation method thereof |
| CN110272268A (en) * | 2018-03-17 | 2019-09-24 | 鞍山盛晨耐火材料有限公司 | A kind of preparation method of ladle corundum lining brick |
| CN108706554A (en) * | 2018-07-03 | 2018-10-26 | 贵州大学 | A kind of technique of ardealite and red mud relieving haperacidity coproduction Machine press carbon-free lining brick for steel ladles |
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| CN112341216B (en) * | 2020-10-30 | 2022-07-19 | 北京联合荣大工程材料股份有限公司 | Self-curing tundish dry material and preparation method thereof |
| CN112430105A (en) * | 2020-10-30 | 2021-03-02 | 云南濮耐昆钢高温材料有限公司 | Aluminum-magnesium-carbon brick prepared from regenerated tabular corundum and preparation method thereof |
| CN113045299A (en) * | 2021-05-19 | 2021-06-29 | 鞍山市安力耐火材料有限公司 | Machine-pressed carbon-free steel ladle brick containing composite binder and preparation method thereof |
| CN114262232A (en) * | 2021-12-18 | 2022-04-01 | 河南竹林庆州耐火材料有限公司 | Preparation method of carbon-free castable added with graphite raw material for refining ladle working lining |
| CN114292093A (en) * | 2021-12-27 | 2022-04-08 | 偃师中岳耐火材料有限公司 | Corundum spinel carbon-free prefabricated part for clean steelmaking |
| CN116283315B (en) * | 2022-12-30 | 2023-12-19 | 马鞍山利尔开元新材料有限公司 | Carbon-free inorganic pressed spinel sliding plate brick and preparation method thereof |
| CN116063090A (en) * | 2023-02-09 | 2023-05-05 | 鞍山市和丰耐火材料有限公司 | Ladle working lining carbon-free corundum spinel precast block and preparation method thereof |
| CN116143528A (en) * | 2023-04-20 | 2023-05-23 | 淄博雷法耐火材料有限公司 | Refractory material binding agent and application method thereof |
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