CN103539467A - 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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- CN103539467A CN103539467A CN201310483743.4A CN201310483743A CN103539467A CN 103539467 A CN103539467 A CN 103539467A CN 201310483743 A CN201310483743 A CN 201310483743A CN 103539467 A CN103539467 A CN 103539467A
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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, relate in particular 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 ladle adopt different class 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.Yet, fast development along with national economy, the industries such as automobile, household electrical appliances, high ferro, oil pipeline are increasing to the market demand of the Clean Steels such as high-quality, special steel, and China steel industry enterprise, also along with the variation of the market requirement is adjusted the product mix, develops the smelting of high-quality steel.The external refining that the ladle lining of take is representative has very important impact with resistance to material to steel quality, in smelting low carbon fine steel grade technique, require the use that as far as possible reduces carbon containing refractory to molten steel carbon drop adverse effect, there is the problem to molten steel recarburization in carbonaceous article, and the problem such as fast, the ladle skin temperature height of molten steel temperature drop in the ladle causing because of thermal conductivity, in the urgent need to and anti-erosion pollution-free to molten steel, high high-quality refractory material of life-span.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, adopt resol to make bonding agent, add a small amount of graphite, add simultaneously a large amount of metal oxidation resistance agent guarantee resin and graphite not oxidized, this class coupling system can't be eliminated the pollution of carbon to high added value molten steel such as ultra low-carbon steel, silicon steel on the one hand, in addition, owing to adding a large amount of metal oxidation resistance agent, production cost is very high, simultaneously, formed ceramic structure after antioxidant oxidation, has very large restriction to the antistripping of goods use procedure.And the carbon-free ladle brick using now, it is the production technique that adopts cast preformed bricks, the scheme of cast preformed bricks is to utilize aluminous cement or micro mist aquation as coupling system, stir after vibration moulding, can only produce several at every turn, maintenance is the demoulding after several hours, just can produce next batch, production efficiency is lower, and coupling system is subject to the impact of temperature and humidity, and product properties fluctuation ratio is larger.
Summary of the invention
Problem to be solved by this invention is to provide a kind of machine of novel coupling system and presses carbon-free corundum spinelle ladle brick, this lining brick does not in use have carbon source, not to molten steel recarburization, there is good opposing molten steel and erosion performance and the thermal shock resistance of slag, thereby meet the production of Clean Steel and ultra low-carbon steel.The present invention provides the preparation method of this brick simultaneously, and it has overcome the deficiency that current carbon-free steel ladle pouring preformed bricks is produced and used, and production efficiency is high and can guarantee the stability of product properties.
Machine of the present invention is pressed carbon-free corundum spinelle ladle brick, 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%.
Machine of the present invention is pressed the preparation method of carbon-free corundum spinelle ladle brick, by machine, presses the weight percent of carbon-free corundum spinelle ladle brick component to carry out proportioning, 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 to 2～3 minutes in said components ratio with large-scale edge runner-wet mill, add respectively bonding agent poly-phosphate liquid and glycan wet mixing 5-8 minute, finally add all abrasive dusts altogether to mix discharging after 20～30 minutes, then use friction press compression moulding, thermal treatment, kiln discharge selection, obtains described carbon-free corundum spinelle brick.
Wherein, mixing is mixing with 1500 type edge runner-wet mills, and moulding is to carry out on 630 tons or 1000 tons of friction presses; Being dried needs thermal treatment more than 48 hours: wherein entering kilneye temperature must not be higher than 50 ℃, and baking time is more than 8 hours, and 110 ℃ of baking times are more than 12 hours, and 200～250 ℃ of baking times are more than 12 hours, and 250～350 ℃ of baking times are more than 16 hours.
The invention has the beneficial effects as follows: 1, by selecting the coupling system of the formed organic and inorganic complexity of new junction agent glycan class and poly-phosphate, mixing by high pressure edge runner-wet mill, effectively improved the idiosome intensity of product molding, the decomposition of 300 ℃ of left and right of glycan class low temperature is abundant in addition, residual charcoal seldom, than remaining significantly of carbonaceous article resol class charcoal, reduce, can not pollute molten steel; 2, the introducing of high-purity aluminium riched spinel particle and micro mist, in being used, goods can be good at absorbing and dissipation elastic strain energy, the destruction of relief of thermal stress to material, improves the thermal shock resistance of carbon-free corundum spinelle ladle brick, improves its antistrip performance; 3, add silicon powder and multimodal α-Al
2o
3micro mist, utilizes it at high temperature to form the structures such as peridotites, spinel with matrix magnesium component, alleviates the stress of organizing thermal expansion to produce, improves heat-shock resistance and the antistripping of material; 4, employing machine pressure mode is produced carbon-free ladle brick, and production efficiency significantly improves, and within 8 hours, can produce 400-500 piece, also without the demoulding, has alleviated artificial labour intensity.
Accompanying drawing explanation
Fig. 1 is preparation method's of the present invention schema.
Embodiment
Machine of the present invention is pressed carbon-free corundum spinelle ladle brick, 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 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%.
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 μ m, and the component comprising 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 μ m, and the component comprising 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 comprising 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%.
Grain type and the per-cent of batching that the embodiment of the present invention adopts are as shown in the table:
As shown in Figure 1, mixing equipment is high pressure edge runner-wet mill to the preparation method that machine of the present invention is pressed carbon-free corundum spinelle ladle brick.After start, first add granulated aggregate to be dry mixed 2-3 minute, then add bonding agent poly-phosphate liquid and glycan wet mixing 5-8 minute, finally add all abrasive dusts altogether to mix discharging after 30 minutes.Work in-process moulding on 1000 tons of brick pressing machines.Forming operation will be observed four jiaos and be taken off material, and first light rear heavy principle operates.Then dry heat is processed more than 48 hours, and wherein entering kilneye temperature must not be higher than 50 ℃, and baking time is more than 8 hours, and 110 ℃ of baking times are more than 16 hours, and 200 ~ 350 ℃ of baking times are more than 24 hours.
The main physical and chemical index of the lining brick obtaining by the method for the invention is as follows: Al
2o
3>=85%, MgO>=4.5%, volume density>=3.18g/cm3 after 350 ℃ of bakings, apparent porosity (350 ℃ * 24h)≤15%, compressive strength (350 ℃ * 24h)>=60MPa, line velocity of variation (1600 ℃ * 3h) 0～1.3%.This product is through on probation in 70 tons of refining ladle, work-ing life >=110 time, in use good stability.
Machine of the present invention presses carbon-free corundum spinelle ladle brick to adopt organic and inorganic mixed binding 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, can be widely used in various ladles, especially concise soft steel and ultra low-carbon steel ladle.
Claims (10)
1. machine is pressed carbon-free corundum spinelle ladle brick, 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 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%.
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 μ m, and the component comprising 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 μ m, and the component comprising 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 comprising and weight percent are: SiO2 >=99.2%, Ca≤0.3%, Fe≤0.6%.
8. ladle brick according to claim 1, it is characterized in that: poly-phosphate in bonding agent: total phosphate (P2O5 meter) content >=68.0～65.0%, nonactive phosphoric acid salt (in P2O5) 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%.
9. the machine described in claim 1-8 is pressed the preparation method of carbon-free corundum spinelle ladle brick, it is characterized in that: by machine claimed in claim 1, press the weight percent of carbon-free corundum spinelle ladle brick component to carry out proportioning, 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 to 2～3 minutes in said components ratio with large-scale edge runner-wet mill, add respectively bonding agent poly-phosphate liquid and glycan wet mixing 5-8 minute, finally add all abrasive dusts altogether to mix discharging after 20～30 minutes, then use friction press compression moulding, thermal treatment, kiln discharge selection, 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 moulding is to carry out on 630 tons or 1000 tons of friction presses; Being dried needs thermal treatment more than 48 hours: wherein entering kilneye temperature must not be higher than 50 ℃, and baking time is more than 8 hours, and 110 ℃ of baking times are more than 12 hours, and 200～250 ℃ of baking times are more than 12 hours, and 250～350 ℃ of baking times are 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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| CN103539467B CN103539467B (en) | 2015-06-17 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103992126A (en) * | 2014-05-30 | 2014-08-20 | 浙江自立股份有限公司 | Method for preparing tabular corundum brick for working lining of carbon-free steel ladle |
| CN105272312A (en) * | 2015-11-12 | 2016-01-27 | 长兴科特碳化硅有限公司 | Spinel combined long-life electric induction furnace lining material |
| 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 |
| CN106495712A (en) * | 2016-10-17 | 2017-03-15 | 安徽马钢耐火材料有限公司 | Unburned ladle brick and preparation method thereof pressed by magnesium gel combined corundum spinelle machine |
| 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 |
| 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 |
| 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 |
| CN111718203A (en) * | 2020-07-28 | 2020-09-29 | 中国一冶集团有限公司 | Refractory castable for converter sublance and preparation method thereof |
| CN112341216A (en) * | 2020-10-30 | 2021-02-09 | 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 |
| 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 |
| CN116283315A (en) * | 2022-12-30 | 2023-06-23 | 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 |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103992126A (en) * | 2014-05-30 | 2014-08-20 | 浙江自立股份有限公司 | Method for preparing tabular corundum brick for working lining of carbon-free steel ladle |
| 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 |
| CN105272312A (en) * | 2015-11-12 | 2016-01-27 | 长兴科特碳化硅有限公司 | Spinel combined long-life electric induction furnace lining material |
| 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 |
| CN106495712A (en) * | 2016-10-17 | 2017-03-15 | 安徽马钢耐火材料有限公司 | Unburned ladle brick and preparation method thereof pressed by magnesium gel combined corundum spinelle machine |
| 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 |
| CN111718203A (en) * | 2020-07-28 | 2020-09-29 | 中国一冶集团有限公司 | Refractory castable for converter sublance and preparation method thereof |
| CN111718203B (en) * | 2020-07-28 | 2022-08-19 | 中国一冶集团有限公司 | Refractory castable for converter sublance and preparation method thereof |
| CN112341216A (en) * | 2020-10-30 | 2021-02-09 | 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 |
| CN116283315A (en) * | 2022-12-30 | 2023-06-23 | 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 |
| 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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