CN103553656B - Low-cost magnesium-silicon based castable for tundish prefabricated component and preparation method thereof - Google Patents
Low-cost magnesium-silicon based castable for tundish prefabricated component and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a low-cost magnesium-silicon based castable for a tundish prefabricated component and a preparation method thereof. According to the invention, magnesium olivine sand, magnesia, silica powder, silicon carbide, sodium tripolyphosphate, sodium hexametaphosphate and organic fiber are used as raw materials. High content of the magnesium olivine sand raw-material is adopted, thus reducing the dosage of magnesia. The price of the magnesium olivine sand raw-material is low and is only 1/3-1/2 of the price of magnesia. Therefore, the cost of the castable product is reduced greatly. In addition, when the dosage of magnesium olivine sand and magnesia is adjusted, granularity of the raw materials magnesium olivine sand and magnesia is changed. Thus, a tundish prefabricated component prepared from the castable still can be endowed with advantages of high strength, anti-explosion performance and the like.
Description
Technical field
The present invention relates to technical field of refractory materials, be specifically related to the siliceous tundish prefabricated component of a kind of low-cost magnesium mould material and preparation method thereof.
Background technology
Depressed along with whole steel-making industry in recent years, particularly, since 2011, the market competitive pressure of refractory materials is increasing, and product profit space is little by little dwindling, and refractory materials manufacturer's existence has been subject to serious challenge.At present, the tundish prefabricated component that domestic refractory materials manufacturer produces is expensive High-Alumina, corundum and the magnalium matter prefabricated component of old many employings still.Along with the increase to Clean Steel demand, promoted tundish prefabricated component to change to alkaline material, magnesia prefabricated component was greatly developed in recent years, and had some superiority in price.But along with the growing tension of alumina resource and magnesia resource, cost of material goes up year by year, and steel mill constantly demands a lower price again, causes product profit low, and the performance of enterprises is produced a very large impact.
Forsterite is a good mineral composition in basic refractory, and 1890 ℃ of fusing points, can replace reheating magnesia.China's forsterite reserves are abundant, after exploitation, can directly use without pre-burning, cost of material is very cheap, can save so valuable magnesia resource and colliery resource, significantly reduce magnesite calcining and decomposing and produce CO2, SO2 and flue dust etc., and applicable Business Economic Benefit needs.Disclosed of on December 15th, 2010, be called in " pouring material for forsterite tundish slag stop wall and production thereof " CN101913888A document, disclose a kind of tundish slag wall technology that adopts the raw materials such as forsterite, magnesia and corundum to prepare, much many research has all been done to this respect by refractory materials enterprise subsequently, but because yield rate is not high and use properties is unstable etc., reason is the use of small area, and product price is still higher.
Summary of the invention
The object of the invention is the deficiency for solving the problems of the technologies described above, the siliceous tundish prefabricated component of a kind of low-cost magnesium mould material and preparation method thereof is provided, the cost value of mould material is cheaper, and it is high to use this mould material to prepare the conforming product rate of tundish prefabricated component, the tundish prefabricated component making has that intensity is high, explosion-proof and the advantage such as slag resistance is good.
The present invention is for solving the problems of the technologies described above, the technical scheme providing is: the siliceous tundish prefabricated component of a kind of low-cost magnesium mould material, magnesium olive sand coarse fodder and compound that described mould material is 30～10mm by granularity are made, and wherein the weight of magnesium olive sand coarse fodder is 20～30% of compound weight;
Described compound comprises the magnesium olive sand 25～40% of the raw material of following weight per-cent: 6～3mm, magnesia 5～10%, 200 object magnesia 10～15%, SiC1～3%, silicon powder 2～4%, tripoly phosphate sodium STPP 0.1～0.15%, Sodium hexametaphosphate 99 0.05～0.1% and the organic fibre 0.1～0.25% of the magnesium olive sand of the magnesium olive sand 25～40% of 3～1mm, 1～0mm, 10～20%, 100 object magnesium olive sand 5～10%, 1～0mm.
MgO content>=45% of described magnesium olive sand, Fe
2o
3content≤9%.
The magnesite clinker of described magnesia MgO content >=95%.
Described silicon carbide is primary silicon carbide or the regenerative carbon SiClx of SiC content >=90%, granularity≤200 order of silicon carbide.
Described silicon powder is SiO
2the silicon powder of content>=94%.
Described organic fibre length is 3～5mm, 15～170 ℃ of fusing points.
A preparation method for mould material for the siliceous tundish prefabricated component of low-cost magnesium, comprises the following steps:
A, get magnesium olive sand, magnesia, silicon powder, silicon carbide, tripoly phosphate sodium STPP, Sodium hexametaphosphate 99 and organic fibre, standby;
MgO content>=45% of described magnesium olive sand, Fe
2o
3content≤9%, the magnesite clinker of magnesia MgO content>=95%, silicon carbide is primary silicon carbide or the regenerative carbon SiClx of SiC content>=90%, silicon powder is SiO
2content>=94%, organic fibre length is 3～5mm, 15～170 ℃ of fusing points;
B, magnesium olive sand raw material are levigate, is classified into 30～10mm, 6～3mm, 3～1mm, 1～0mm and five kinds of varigrained particulate materials of 100 orders, standby; Magnesia is worn into fine powder, be classified into 1～0mm and two kinds of varigrained particulate materials of 200 orders, standby; Silicon carbide is worn into granularity≤200 object fine powder, standby;
C, get by weight percentage the magnesium olive sand 25～40% of 6～3mm, magnesia 5～10%, 200 object magnesia 10～15%, SiC1～3%, silicon powder 2～4%, tripoly phosphate sodium STPP 0.1～0.15%, Sodium hexametaphosphate 99 0.05～0.1% and the organic fibre 0.1～0.25% of the magnesium olive sand of the magnesium olive sand 25～40% of 3～1mm, 1～0mm, 10～20%, 100 object magnesium olive sand 5～10%, 1～0mm are standby;
D, magnesia, silicon powder, tripoly phosphate sodium STPP and Sodium hexametaphosphate 99 are added and in vibrating mill, carry out common mill processing;
E, the magnesium olive sand of getting in step c add stirrer, then add magnesia, silicon powder, tripoly phosphate sodium STPP and the Sodium hexametaphosphate 99 in silicon carbide, organic fibre and steps d, through being total to mill, processed, obtain compound;
F, the magnesium olive sand coarse fodder that is 30～10mm to the granularity that adds compound weight 20～30% in stirrer, obtain stirring material, and add the water that stirs material weight 4.2～4.6%, stirs 3～5min, obtains mould material.
beneficial effect
1, mould material of the present invention has adopted the magnesium olive sand raw material of more content, reduced the consumption of magnesia, magnesium olive sand raw material cheap, it is only 1/3～1/2 of magnesia price, the cost value of mould material product significantly reduces, and because the present invention is when adjusting magnesium olive sand and magnesia consumption, the granularity of magnesium olive sand and magnesia raw material is changed, make the tundish prefabricated component that this mould material makes still can keep the advantages such as intensity is high, explosion-proof.
2, the present invention uses vibration mill to carry out common mill pre-treatment the magnesia in raw material, silicon powder, tripoly phosphate sodium STPP and Sodium hexametaphosphate 99, can reduce the amount of water of mould material and improve mould material mobility during use, obviously improves the qualification rate of preform product.
3, the present invention has added silicon carbide in mould material raw material, can obviously improve the slag resistance of preform product.
4, adopt mould material of the present invention can produce the various tundish prefabricated components such as slag blocking wall, current stabilizer, strike plate, gear dam, swing runner, tens steel mills are used nearly 1 year at home at present, and use properties is stable, and reflection is good.
Embodiment
The siliceous tundish prefabricated component of a low-cost magnesium mould material, magnesium olive sand coarse fodder and compound that described mould material is 30～10mm by granularity are made, and wherein the weight of magnesium olive sand coarse fodder is 20～30% of compound weight;
Described compound comprises the magnesium olive sand 25～40% of the raw material of following weight per-cent: 6～3mm, magnesia 5～10%, 200 object magnesia 10～15%, SiC1～3%, silicon powder 2～4%, tripoly phosphate sodium STPP 0.1～0.15%, Sodium hexametaphosphate 99 0.05～0.1% and the organic fibre 0.1～0.25% of the magnesium olive sand of the magnesium olive sand 25～40% of 3～1mm, 1～0mm, 10～20%, 100 object magnesium olive sand 5～10%, 1～0mm.
The present invention's magnesium olive used sand is olive sand raw material, and the exploitation of peridotites rawore can be used by fragmentation, cheap.With raw material form and oversize granule mode, add and can add olive sand, to reduce costs.
MgO content>=45% of described magnesium olive sand, Fe
2o
3content≤9%.
The magnesite clinker of described magnesia MgO content >=95%.
Described silicon carbide is primary silicon carbide or the regenerative carbon SiClx of SiC content >=90%, granularity≤200 order of silicon carbide.
Described silicon powder is SiO
2the silicon powder of content>=94%.
Described organic fibre length is 3～5mm, 15～170 ℃ of fusing points.
A preparation method for mould material for the siliceous tundish prefabricated component of low-cost magnesium, comprises the following steps:
A, get magnesium olive sand, magnesia, silicon powder, silicon carbide, tripoly phosphate sodium STPP, Sodium hexametaphosphate 99 and organic fibre, standby;
MgO content>=45% of described magnesium olive sand, Fe
2o
3content≤9%, the magnesite clinker of magnesia MgO content>=95%, silicon carbide is primary silicon carbide or the regenerative carbon SiClx of SiC content>=90%, silicon powder is SiO
2content>=94%, organic fibre length is 3～5mm, 15～170 ℃ of fusing points;
B, magnesium olive sand raw material are levigate, is classified into 30～10mm, 6～3mm, 3～1mm, 1～0mm and five kinds of varigrained particulate materials of 100 orders, standby; Magnesia is worn into fine powder, be classified into 1～0mm and two kinds of varigrained particulate materials of 200 orders, standby; Silicon carbide is worn into granularity≤200 object fine powder, standby;
C, get by weight percentage the magnesium olive sand 25～40% of 6～3mm, magnesia 5～10%, 200 object magnesia 10～15%, SiC1～3%, silicon powder 2～4%, tripoly phosphate sodium STPP 0.1～0.15%, Sodium hexametaphosphate 99 0.05～0.1% and the organic fibre 0.1～0.25% of the magnesium olive sand of the magnesium olive sand 25～40% of 3～1mm, 1～0mm, 10～20%, 100 object magnesium olive sand 5～10%, 1～0mm are standby;
D, magnesia, silicon powder, tripoly phosphate sodium STPP and Sodium hexametaphosphate 99 are added and in vibrating mill, carry out common mill processing;
E, the magnesium olive sand of getting in step c add stirrer, then add magnesia, silicon powder, tripoly phosphate sodium STPP and the Sodium hexametaphosphate 99 in silicon carbide, organic fibre and steps d, through being total to mill, processed, obtain compound;
F, the weight percent of controlling aggregate be 80～84% and the weight ratio of fine powder be 16～20%, the magnesium olive sand coarse fodder that is 30～10mm to the granularity that adds compound weight 20～30% in stirrer, obtain stirring material, and add stirring to expect the water of weight 4.2～4.6%, stir 3～5min, obtain mould material.
Described aggregate is that granularity is the raw material that the magnesium olive sand material of 30～10mm, 6～3mm, 3～1mm and 1～0mm, magnesia material that granularity is 1～0mm and other granularities are greater than 1～0mm grain size category, described fine powder is that granularity is that 100 object magnesium olive sand material, granularity are the raw material that 200 object magnesia material, granularity≤200 object carborundum powder and other granularities are less than 1～0mm grain size category, and the additional proportion of this aggregate and fine powder can improve workability and the use properties of mould material.
embodiment 1
A preparation method for mould material for the siliceous tundish prefabricated component of low-cost magnesium, comprises the following steps:
A, get magnesium olive sand, magnesia, silicon powder, silicon carbide, tripoly phosphate sodium STPP, Sodium hexametaphosphate 99 and organic fibre, standby;
B, magnesium olive sand raw material are levigate, is classified into 30～10mm, 6～3mm, 3～1mm, 1～0mm and five kinds of varigrained particulate materials of 100 orders, standby; Magnesia is worn into fine powder, be classified into 1～0mm and two kinds of varigrained particulate materials of 200 orders, standby; Silicon carbide is worn into granularity≤200 object fine powder, standby;
C, get by weight percentage the magnesium olive sand 30% of 6～3mm, magnesia 5%, 200 object magnesia 10%, SiC1.75%, silicon powder 2%, tripoly phosphate sodium STPP 0.1%, Sodium hexametaphosphate 99 0.05% and the organic fibre 0.1% of the magnesium olive sand of the magnesium olive sand 35% of 3～1mm, 1～0mm 11%, 100 object magnesium olive sand 5%, 1～0mm are standby;
D, magnesia, silicon powder, tripoly phosphate sodium STPP and Sodium hexametaphosphate 99 are added and in vibrating mill, carry out common mill processing;
E, the magnesium olive sand of getting in step c add stirrer, then add magnesia, silicon powder, tripoly phosphate sodium STPP and the Sodium hexametaphosphate 99 in silicon carbide, organic fibre and steps d, through being total to mill, processed, obtain compound;
F, the weight percent of controlling aggregate be 80% and the weight ratio of fine powder be 20%, the magnesium olive sand coarse fodder that is 30～10mm to the granularity that adds compound weight 20～30% in stirrer, obtains stirring material, and adds the water that stirs material weight 4.2%, stir 3～5min, obtain mould material.
embodiment 2
A preparation method for mould material for the siliceous tundish prefabricated component of low-cost magnesium, comprises the following steps:
A, get magnesium olive sand, magnesia, silicon powder, silicon carbide, tripoly phosphate sodium STPP, Sodium hexametaphosphate 99 and organic fibre, standby;
B, magnesium olive sand raw material are levigate, is classified into 30～10mm, 6～3mm, 3～1mm, 1～0mm and five kinds of varigrained particulate materials of 100 orders, standby; Magnesia is worn into fine powder, be classified into 1～0mm and two kinds of varigrained particulate materials of 200 orders, standby; Silicon carbide is worn into granularity≤200 object fine powder, standby;
C, get by weight percentage the magnesium olive sand 25% of 6～3mm, magnesia 8%, 200 object magnesia 11.5%, SiC3%, silicon powder 4%, tripoly phosphate sodium STPP 0.15%, Sodium hexametaphosphate 99 0.1% and the organic fibre 0.25% of the magnesium olive sand of the magnesium olive sand 25% of 3～1mm, 1～0mm 15%, 100 object magnesium olive sand 8%, 1～0mm are standby;
D, magnesia, silicon powder, tripoly phosphate sodium STPP and Sodium hexametaphosphate 99 are added and in vibrating mill, carry out common mill processing;
E, the magnesium olive sand of getting in step c add stirrer, then add magnesia, silicon powder, tripoly phosphate sodium STPP and the Sodium hexametaphosphate 99 in silicon carbide, organic fibre and steps d, through being total to mill, processed, obtain compound;
F, the magnesium olive sand coarse fodder that is 30～10mm to the granularity that adds compound weight 20～30% in stirrer, obtain stirring material, and add the water that stirs material weight 4.6%, stirs 3～5min, obtains mould material.
embodiment 3
A preparation method for mould material for the siliceous tundish prefabricated component of low-cost magnesium, comprises the following steps:
A, get magnesium olive sand, magnesia, silicon powder, silicon carbide, tripoly phosphate sodium STPP, Sodium hexametaphosphate 99 and organic fibre, standby;
B, magnesium olive sand raw material are levigate, is classified into 30～10mm, 6～3mm, 3～1mm, 1～0mm and five kinds of varigrained particulate materials of 100 orders, standby; Magnesia is worn into fine powder, be classified into 1～0mm and two kinds of varigrained particulate materials of 200 orders, standby; Silicon carbide is worn into granularity≤200 object fine powder, standby;
C, get by weight percentage the magnesium olive sand 25% of 6～3mm, magnesia 5%, 200 object magnesia 10%, SiC2%, silicon powder 2.7%, tripoly phosphate sodium STPP 0.1%, Sodium hexametaphosphate 99 0.1% and the organic fibre 0.1% of the magnesium olive sand of the magnesium olive sand 40% of 3～1mm, 1～0mm 10%, 100 object magnesium olive sand 5%, 1～0mm are standby;
D, magnesia, silicon powder, tripoly phosphate sodium STPP and Sodium hexametaphosphate 99 are added and in vibrating mill, carry out common mill processing;
E, the magnesium olive sand of getting in step c add stirrer, then add magnesia, silicon powder, tripoly phosphate sodium STPP and the Sodium hexametaphosphate 99 in silicon carbide, organic fibre and steps d, through being total to mill, processed, obtain compound;
F, the weight percent of controlling aggregate be 83% and the weight ratio of fine powder be 17%, the magnesium olive sand coarse fodder that is 30～10mm to the granularity that adds compound weight 20～30% in stirrer, obtains stirring material, and adds the water that stirs material weight 4.6%, stir 3～5min, obtain mould material.
performance test
The mould material that embodiment 1,2,3 is made is carried out correlated performance test, and test result is as shown in the table:
?
commerical test
Through carry out commerical test on different steel mills tundish, according to the method production mould material of above-described embodiment 1,2,3, its use properties is as shown in the table:
Claims (1)
1. a preparation method for mould material for the siliceous tundish prefabricated component of low-cost magnesium, is characterized in that: comprise the following steps:
A, get magnesium olive sand, magnesia, silicon powder, silicon carbide, tripoly phosphate sodium STPP, Sodium hexametaphosphate 99 and organic fibre, standby;
MgO content>=45% of described magnesium olive sand, Fe
2o
3content≤9%, the magnesite clinker of magnesia MgO content>=95%, silicon carbide is primary silicon carbide or the regenerative carbon SiClx of SiC content>=90%, silicon powder is SiO
2content>=94%, organic fibre length is 3～5mm, 15～170 ℃ of fusing points;
B, magnesium olive sand raw material are levigate, is classified into 30～10mm, 6～3mm, 3～1mm, 1～0mm and five kinds of varigrained particulate materials of 100 orders, standby; Magnesia is worn into fine powder, be classified into 1～0mm and two kinds of varigrained particulate materials of 200 orders, standby; Silicon carbide is worn into granularity≤200 object fine powder, standby;
C, get by weight percentage the magnesium olive sand 25～40% of 6～3mm, magnesia 5～10%, 200 object magnesia 10～15%, SiC1～3%, silicon powder 2～4%, tripoly phosphate sodium STPP 0.1～0.15%, Sodium hexametaphosphate 99 0.05～0.1% and the organic fibre 0.1～0.25% of the magnesium olive sand of the magnesium olive sand 25～40% of 3～1mm, 1～0mm, 10～20%, 100 object magnesium olive sand 5～10%, 1～0mm are standby;
D, magnesia, silicon powder, tripoly phosphate sodium STPP and Sodium hexametaphosphate 99 are added and in vibrating mill, carry out common mill processing;
E, the magnesium olive sand of getting in step c add stirrer, then add magnesia, silicon powder, tripoly phosphate sodium STPP and the Sodium hexametaphosphate 99 in silicon carbide, organic fibre and steps d, through being total to mill, processed, obtain compound;
F, the magnesium olive sand coarse fodder that is 30～10mm to the granularity that adds compound weight 20～30% in stirrer, obtain stirring material, and add the water that stirs material weight 4.2～4.6%, stirs 3～5min, obtains mould material.
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| CN104338923A (en) * | 2014-11-05 | 2015-02-11 | 安徽马钢耐火材料有限公司 | Current stabilizer for smelting tundish, manufacturing method of current stabilizer and current stabilizer machining mold |
| CN105084918B (en) * | 2015-08-25 | 2018-01-30 | 北京利尔高温材料股份有限公司 | A kind of olive chiltern prefabricated component and preparation method thereof |
| CN106699201A (en) * | 2016-12-13 | 2017-05-24 | 攀枝花钢城集团有限公司 | Castable for steel making tundish slag dam |
| CN106588048A (en) * | 2016-12-13 | 2017-04-26 | 攀枝花钢城集团有限公司 | Steelmaking tundish guard plate and castable therefor |
| CN109627026B (en) * | 2019-01-31 | 2022-02-01 | 河南竹林耐材有限公司 | Regenerated silicon carbide Al2O3-SiC-C iron runner castable and preparation method thereof |
| CN110436893A (en) * | 2019-08-27 | 2019-11-12 | 北京利尔高温材料股份有限公司 | A kind of carbon-free coating tundish material |
| CN110511046B (en) * | 2019-09-12 | 2022-02-18 | 马鞍山江润冶金有限责任公司 | Refractory castable for slag stopping component of continuous casting tundish and preparation method |
| CN111004025A (en) * | 2019-12-14 | 2020-04-14 | 青岛尊龙耐火材料有限公司 | Component of slag adhering resisting coating for ladle lining and preparation method thereof |
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| CN101913888B (en) * | 2010-08-18 | 2013-02-13 | 武汉钢铁(集团)公司 | Pouring material for forsterite tundish slag stop wall and production process thereof |
| CN102617165A (en) * | 2012-03-28 | 2012-08-01 | 宜兴新威利成耐火材料有限公司 | Forsterite fireproof castable |
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