CN105499552A - Flow guide agent special for low-carbon cast steel and preparing method of flow guide agent - Google Patents
Flow guide agent special for low-carbon cast steel and preparing method of flow guide agent Download PDFInfo
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- CN105499552A CN105499552A CN201610025509.0A CN201610025509A CN105499552A CN 105499552 A CN105499552 A CN 105499552A CN 201610025509 A CN201610025509 A CN 201610025509A CN 105499552 A CN105499552 A CN 105499552A
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- Prior art keywords
- low
- cast steel
- flow guide
- carbon cast
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/14—Closures
- B22D41/44—Consumable closure means, i.e. closure means being used only once
- B22D41/46—Refractory plugging masses
Abstract
The invention discloses a flow guide agent special for low-carbon cast steel. The flow guide agent comprises, by mass, 15%-17% of Gr2O3, 12%-25% of SiO2, 8%-15% of MgO, 6%-15% of Al2O3 and 2%-8% of Fe2O3. Compared with the prior art, by means of the flow guide agent special for the low-carbon cast steel, the defects in the prior art are overcome; as the ratio and the production technology are reasonably arranged, cost is low, the expansion factor of siliceous quartz sand is stable at the high temperature, the high-temperature sintering performance is good, molten steel corrosion resistance and slag corrosion resistance are good, particle granularity distribution is even, liquidity is good, the thermal expansion rate is small, and the free-opening rate is high.
Description
Technical field
The present invention relates to cast steel processing technique field, specifically special drainage agent of a kind of low-carbon cast steel and preparation method thereof.
Background technology
It is that one is high temperature resistant, thermal stability good that drainage agent generalizes, the refractory material that resistance to molten steel corrodes, for filling ladle nozzle inside, after preventing from tapping, molten steel enters the mouth of a river, do not sinter under high temperature, reach after slide plate opens, drainage agent can not fall automatically, and then molten steel enters Zhong Bao down thereupon, reach and do not burn oxygen, not drainage, prevent molten steel secondary oxidation, improving molten steel degree of purity, meet the direct motion of high-speed continuous casting, is that high-speed continuous casting even waters most important link.
At present, domestic and international steel mill drainage agent used roughly divides into two large classes by steel grade: 1, stainless steel drainage agent, and 2, carbon steel drainage agent.But from process for making and molten steel composition, stainless steel is divided into again common stainless steel drainage agent, ultrapure stainless steel drainage agent, during carbon steel drainage agent is divided into, high-carbon steel drainage agent, low-carbon (LC), ultra-low-carbon steel drainage agent and special steel drainage agent three major types, several drainage agent smelts the demand of steel grade and technique in order to meet steel mill above, , adopt kind and stoichiometric amount to dropping into material to be optimized collocation when drainage agent conceptual design, in order to ensure various material at high temperature each component can play complementary effect, high price zircon sand is generally selected when material is arranged in pairs or groups, chrome ore, silicalite sand and the low melting point feldspathic sand preventing infiltration of molten steel from allocating into, allocate appropriate carbonaceous material in addition into, play the effect of isolation and lubrication, join carbon oven dry through special process stirring to form.Refinery practice General Requirements drainage agent in low-carbon cast steel smelting has superpower refractoriness, anti-molten steel scouring capability, anti-molten steel soak into ability and reasonably sinter thickness, but it is lower for the drainage agent casting rate of refining at present, also there is refractoriness lower simultaneously, easily introduce problems such as being mingled with.
Summary of the invention
The present invention aims to provide special drainage agent of a kind of low-carbon cast steel and preparation method thereof, instant invention overcomes the deficiencies in the prior art, by rationally arranging proportioning and production technology, provide that the silicalite sand coefficient of expansion under a kind of low cost, high temperature is stablized, good, the anti-molten steel of high temperature sintering performance and slag corrosion is good, particle size distribution evenly, good fluidity, coefficient of thermal expansion are less, self-opening rate the is high special drainage agent of low-carbon cast steel.
The invention provides following technical scheme:
The special drainage agent of a kind of low-carbon cast steel, it is made up of by mass percentage following component: Gr
2o
315-17%, SiO
212-25%, MgO8-15%, Al
2o
36-15%, Fe
2o
32-8%.
Special drainage agent of a kind of low-carbon cast steel and preparation method thereof, comprises the following steps:
(1) chrome ore 25-40 part, exquisite silica sand 10-25 part, fused magnesite particle 5-15 part, feldspathic sand 3-8 part, magnesium aluminate spinel 12-15 part, quartz sand 2-5 part, potassic feldspar 5-8 part, graphite microparticles 6-10 part is taken, join successively in mixing plant, high-speed stirred 15-20 minute, add conditioning agent again, high-speed stirred 8-10 minute, add the water of said components gross weight 8-10% again, high-speed stirred mixes, and obtains mixture;
(2) above-mentioned steps mixture is placed in Rotary drying stove to toast, baking temperature 170-200 DEG C, baking time is 1.5-2 hour;
(3) using said mixture pulverize after add mass percent be the pinniform polysilicon of 2-3% as additive, add muller, mix 5-10 minute, packs warehouse-in after the assay was approved, namely obtains finished product.
In described step (2), oven dry degree is that in mixture, water content is not more than 0.05%.
Compared with the prior art, beneficial effect of the present invention: instant invention overcomes the deficiencies in the prior art, by rationally arranging proportioning and production technology, provide that the silicalite sand coefficient of expansion under a kind of low cost, high temperature is stablized, good, the anti-molten steel of high temperature sintering performance and slag corrosion is good, particle size distribution evenly, good fluidity, coefficient of thermal expansion are less, self-opening rate the is high special drainage agent of low-carbon cast steel.
Detailed description of the invention
Below in conjunction with the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment 1 one kinds of special drainage agents of low-carbon cast steel, it is made up of by mass percentage following component: Gr
2o
315%, SiO
212%, MgO8%, Al
2o
36%, Fe
2o
32%.
Special drainage agent of a kind of low-carbon cast steel and preparation method thereof, comprises the following steps:
(1) chrome ore 25-40 part, exquisite silica sand 10-25 part, fused magnesite particle 5-15 part, feldspathic sand 3-8 part, magnesium aluminate spinel 12-15 part, quartz sand 2-5 part, potassic feldspar 5-8 part, graphite microparticles 6-10 part is taken, join successively in mixing plant, high-speed stirred 15-20 minute, add conditioning agent again, high-speed stirred 8-10 minute, add the water of said components gross weight 8-10% again, high-speed stirred mixes, and obtains mixture;
(2) above-mentioned steps mixture is placed in Rotary drying stove to toast, baking temperature 170-200 DEG C, baking time is 1.5-2 hour;
(3) using said mixture pulverize after add mass percent be the pinniform polysilicon of 2-3% as additive, add muller, mix 5-10 minute, packs warehouse-in after the assay was approved, namely obtains finished product.
In described step (2), oven dry degree is that in mixture, water content is not more than 0.05%.
Embodiment 2 one kinds of special drainage agents of low-carbon cast steel, it is made up of by mass percentage following component: Gr
2o
317%, SiO
225%, MgO15%, Al
2o
315%, Fe
2o
38%.
Special drainage agent of a kind of low-carbon cast steel and preparation method thereof, comprises the following steps:
(1) chrome ore 25-40 part, exquisite silica sand 10-25 part, fused magnesite particle 5-15 part, feldspathic sand 3-8 part, magnesium aluminate spinel 12-15 part, quartz sand 2-5 part, potassic feldspar 5-8 part, graphite microparticles 6-10 part is taken, join successively in mixing plant, high-speed stirred 15-20 minute, add conditioning agent again, high-speed stirred 8-10 minute, add the water of said components gross weight 8-10% again, high-speed stirred mixes, and obtains mixture;
(2) above-mentioned steps mixture is placed in Rotary drying stove to toast, baking temperature 170-200 DEG C, baking time is 1.5-2 hour;
(3) using said mixture pulverize after add mass percent be the pinniform polysilicon of 2-3% as additive, add muller, mix 5-10 minute, packs warehouse-in after the assay was approved, namely obtains finished product.
In described step (2), oven dry degree is that in mixture, water content is not more than 0.05%.
Embodiment 3 one kinds of special drainage agents of low-carbon cast steel, it is made up of by mass percentage following component: Gr
2o
316%, SiO
218%, MgO12%, Al
2o
314%, Fe
2o
36%.
Special drainage agent of a kind of low-carbon cast steel and preparation method thereof, comprises the following steps:
(1) chrome ore 25-40 part, exquisite silica sand 10-25 part, fused magnesite particle 5-15 part, feldspathic sand 3-8 part, magnesium aluminate spinel 12-15 part, quartz sand 2-5 part, potassic feldspar 5-8 part, graphite microparticles 6-10 part is taken, join successively in mixing plant, high-speed stirred 15-20 minute, add conditioning agent again, high-speed stirred 8-10 minute, add the water of said components gross weight 8-10% again, high-speed stirred mixes, and obtains mixture;
(2) above-mentioned steps mixture is placed in Rotary drying stove to toast, baking temperature 170-200 DEG C, baking time is 1.5-2 hour;
(3) using said mixture pulverize after add mass percent be the pinniform polysilicon of 2-3% as additive, add muller, mix 5-10 minute, packs warehouse-in after the assay was approved, namely obtains finished product.
In described step (2), oven dry degree is that in mixture, water content is not more than 0.05%.
To those skilled in the art, obviously the invention is not restricted to the details of described one exemplary embodiment, and when not deviating from spirit of the present invention or essential characteristic, the present invention can be realized in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present invention is limited by claims instead of described explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the present invention.In addition, be to be understood that, although this description is described according to embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of description is only for clarity sake, those skilled in the art should by description integrally, and the technical scheme in each embodiment also through appropriately combined, can form other embodiments that it will be appreciated by those skilled in the art that.
Claims (3)
1. the special drainage agent of low-carbon cast steel, is characterized in that, it is made up of by mass percentage following component: Gr
2o
315-17%, SiO
212-25%, MgO8-15%, Al
2o
36-15%, Fe
2o
32-8%.
2. special drainage agent of a kind of low-carbon cast steel according to claim 1 and preparation method thereof, is characterized in that, comprise the following steps:
(1) chrome ore 25-40 part, exquisite silica sand 10-25 part, fused magnesite particle 5-15 part, feldspathic sand 3-8 part, magnesium aluminate spinel 12-15 part, quartz sand 2-5 part, potassic feldspar 5-8 part, graphite microparticles 6-10 part is taken, join successively in mixing plant, high-speed stirred 15-20 minute, add conditioning agent again, high-speed stirred 8-10 minute, add the water of said components gross weight 8-10% again, high-speed stirred mixes, and obtains mixture;
(2) above-mentioned steps mixture is placed in Rotary drying stove to toast, baking temperature 170-200 DEG C, baking time is 1.5-2 hour;
(3) using said mixture pulverize after add mass percent be the pinniform polysilicon of 2-3% as additive, add muller, mix 5-10 minute, packs warehouse-in after the assay was approved, namely obtains finished product.
3. special drainage agent of a kind of low-carbon cast steel according to claim 1 and 2 and preparation method thereof, is characterized in that: in described step (2), oven dry degree is that in mixture, water content is not more than 0.05%.
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| CN201610025509.0A CN105499552A (en) | 2016-01-13 | 2016-01-13 | Flow guide agent special for low-carbon cast steel and preparing method of flow guide agent |
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|---|---|---|---|
| CN201610025509.0A CN105499552A (en) | 2016-01-13 | 2016-01-13 | Flow guide agent special for low-carbon cast steel and preparing method of flow guide agent |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005081366A (en) * | 2003-09-05 | 2005-03-31 | Nisshin Steel Co Ltd | Nozzle filler |
| CN102233412A (en) * | 2011-06-27 | 2011-11-09 | 河南通宇冶材集团有限公司 | Carbon-free steel ladle drainage agent for extremely-low carbon steel |
| CN102248155A (en) * | 2011-07-28 | 2011-11-23 | 西峡县隆达耐材有限责任公司 | Refining drainage agent and preparation method thereof |
| CN103145431A (en) * | 2013-03-25 | 2013-06-12 | 江苏嘉耐高温材料有限公司 | Steel ladle drainage sand for ultra-low carbon steel and preparation method |
| CN104311049A (en) * | 2014-09-30 | 2015-01-28 | 马鞍山市欣隆炉料有限责任公司 | Preparation method of siliceous stuffing sand |
-
2016
- 2016-01-13 CN CN201610025509.0A patent/CN105499552A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005081366A (en) * | 2003-09-05 | 2005-03-31 | Nisshin Steel Co Ltd | Nozzle filler |
| CN102233412A (en) * | 2011-06-27 | 2011-11-09 | 河南通宇冶材集团有限公司 | Carbon-free steel ladle drainage agent for extremely-low carbon steel |
| CN102248155A (en) * | 2011-07-28 | 2011-11-23 | 西峡县隆达耐材有限责任公司 | Refining drainage agent and preparation method thereof |
| CN103145431A (en) * | 2013-03-25 | 2013-06-12 | 江苏嘉耐高温材料有限公司 | Steel ladle drainage sand for ultra-low carbon steel and preparation method |
| CN104311049A (en) * | 2014-09-30 | 2015-01-28 | 马鞍山市欣隆炉料有限责任公司 | Preparation method of siliceous stuffing sand |
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Application publication date: 20160420 |
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