CN105236996B - A kind of converter flue feeding chute castable and preparation method thereof - Google Patents
A kind of converter flue feeding chute castable and preparation method thereof Download PDFInfo
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- CN105236996B CN105236996B CN201510554719.4A CN201510554719A CN105236996B CN 105236996 B CN105236996 B CN 105236996B CN 201510554719 A CN201510554719 A CN 201510554719A CN 105236996 B CN105236996 B CN 105236996B
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Abstract
The invention belongs to steel industry converter flue feeding chute fire resisting material field, specifically, it is related to a kind of castable of converter flue feeding chute and preparation method thereof.The castable of the present invention contains the medium-grade magnesite 10~25% that granularity is 3~5mm, granularity is 1~3mm medium-grade magnesite 20~40%, granularity is 0~3mm alumine 10~25%, granularity is 0~1mm magnesium aluminate spinel 5~20%, the commercial alumina 5~15% of granularity≤50 μm, granularity is SiC3~8% of 80~120 mesh, granularity≤0.088mm pure calcium aluminate cement 2~8%, waterglass 2~6%, water reducer 0.5~1.5%.The castable can meet converter flue fire door section both sides use condition, have that cost is low, intensity is high, high temperature resistant, rub resistance with converter flue feeding chute of its making, and anti-slag, high-temperature gas erosiveness are strong, the advantages of long lifespan.Meanwhile, unitary solid cast, it is not necessary to water cooling thoroughly solves the seepy question of puzzlement feeding chute, and save great lot of water resources.
Description
Technical field
The invention belongs to steel industry converter flue feeding chute fire resisting material field, specifically, it is related to a kind of use
In castable of converter flue feeding chute and preparation method thereof.
Background technology
Converter flue feeding chute is called emission of baiting chute, blanking water jacket or charging chute, is mounted in converter flue fire door
Section both sides.Major function is that the raw material of the impurity such as dephosphorization, sulphur is removed for addition in converter steelmaking process.The heating surface of feeding chute is held
By the erosive wear of solid material, the corrosion of sour gas and the oxidation of high-temperature water vapor.The high temperature sludge splash, which easily blows, to be splashed
Water vapour, SO in high temperature erosion slag, high-temperature flue gas are formed to heating surface2、SO3, fluoro-gas content it is higher when can occur it is serious
Corrosion, working environment very severe.When smelting, lower block material forms gravity impact, abrasion to feeding chute water tank position, leads
The leakage of heat pipe position is caused, the principal element used as influence chute.At present both at home and abroad more than feeding chute using heat-resisting, wear-resisting
There is circulating water steel matter, inside, but because from fire door, closely, converter smelting temperature is up to 1600 DEG C, under such operating mode,
Heating surface temperature is too high to cause water jacket heat pipe to burst, so as to drainage occur.And converter smelting raw material is passing through feed opening
There is higher speed during water jacket, additional raw material has certain hardness, so that feed opening water jacket heating surface is often subject to raw material
Shock and abrasion, ultimately result in and drainage occur.Therefore, often there is drainage in feeding chute, so that change frequently,
Influence converter producing.
At present, the feeding chute life-span of domestic and international major steel mill is generally or so half a year, changes take around more than 20 every time
Individual hour, product quality and rhythm of production are not only influenceed, safeguard and change labor intensity greatly, and there are major safety risks, one
Degree turns into one of subject matter that restricting is produced.
The problem of for presently, there are, the purpose of the present invention be change feeding chute material there is provided a kind of refractory material
Castable, replaces steel material with refractory material, not only increases feeding chute service life, be also greatly reduced it and be fabricated to
This.Meanwhile, unitary solid cast feeding chute saves circulating water, thoroughly solves seepy question, and save a large amount of water moneys
Source, meets the requirement of the continuous production operation of converter.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of with low cost, converter flue feeding chute of function admirable
Castable, the castable has that cost is low, intensity is high, high temperature resistant, rub resistance, and anti-slag, high-temperature gas erosiveness are strong, long lifespan
The advantages of, compared with existing steel, feeding chute service life is greatly improved, and cost is greatly lowered, and is asked in the absence of leak
Topic.
In order to solve the above technical problems, the technical solution adopted by the present invention is as follows：
The castable of the converter flue feeding chute of the present invention, the component of its raw material includes by weight percentage：
According to the castable of the present invention, it is preferable that the component of the castable raw material includes by weight percentage：
It is further preferred that the component of the castable raw material includes by weight percentage：
Still further preferably, the component of the castable raw material includes by weight percentage：
According to the castable of the present invention, wherein, the water reducer is sodium lignin sulfonate.
According to the castable of the present invention, the Al of the commercial alumina2O3Content >=95%.The pure calcium aluminate cement is excellent
Elect plain edition (Al as2O3Content 72%~78%).
The selection of the size distribution of each raw material of the present invention, is directly handed over 1mm~5mm medium-grade magnesites, alumine particle
Mistake is combined into network skeleton, improves intensity.＜ 1mm other raw materials are wrapped on skeleton, and a small amount of liquid is produced in sintering process
Mutually further fill internal micro- stomata so that material is finer and close.And fully reacted between each material in sintering process, the company of composition
Continuous clean crystal mesh, formed directly in conjunction with feature structure, so as to significantly improve the r of product, extend it and use the longevity
Life.Pure calcium aluminate cement improves initial strength.
Present invention also offers the preparation method of above-mentioned castable, comprise the following steps：
1) various raw materials are weighed in proportion, are mixed 3~5 minutes, obtain compound；
2) water of compound gross weight 4%~6% is added, continues to mix 6~9 minutes, castable is made.
Present invention also offers a kind of converter flue feeding chute, its prepared by above any described castable cast and
Into.
The converter flue feeding chute preparation method, comprises the following steps：
1) vibrating forming in the mould for having fixed the castable injection of the present invention；
2) by step 1) model of moulding by casting is stripped after conserving 2 days, and baking 48 hours, Ran Houzai are carried out at 110 DEG C
24 hours are incubated at a temperature of 1650 DEG C in high temperature furnace, feeding chute is made after natural cooling.
The present invention has active and effective effect
1st, compared with current steel matter converter flue feeding chute, the castable raw material is refractory material, wide material sources, valency
Lattice are cheap, considerably reduce the unit cost of feeding chute.
2nd, compared with current steel matter converter flue feeding chute, the feeding chute prepared with the castable has good
High temperature resistant, rub resistance, anti-slag, high-temperature gas erosiveness are strong, substantially increase the service life of feeding chute.
3rd, compared with current steel matter converter flue feeding chute, water cooling is not needed with feeding chute prepared by the castable
But, seepy question is thoroughly solved, and has saved great lot of water resources.
4th, compared with current steel matter converter flue feeding chute, poured with feeding chute unitary solid prepared by the castable
Note, convenient and quick construction, it is easy to operate, short construction period.
5th, the converter flue feeding chute prepared by the castable, being applicable to the both sides work of converter flue fire door section will
Ask, its main physical and chemical index is as follows：
Embodiment
Embodiment 1
A kind of castable for preparing converter flue feeding chute, its composition of raw materials is shown in Table 1：
Various materials are weighed in ratio described in table 1, stirrer for mixing is put into and stirs 3~5 minutes, add water and (add water
Measure 4% for material gross weight~6%) mix 2~3 minutes, inject vibrating forming in the mould that has fixed.Pour into
It is stripped after being conserved 2 days after type, baking 48 hours is carried out at 110 DEG C, then 24 are incubated at a temperature of 1650 DEG C in high temperature furnace again
Hour, it can be come into operation after natural cooling.Its main physical and chemical index is as follows：
Embodiment 2
A kind of castable for preparing converter flue feeding chute, its composition of raw materials is shown in Table 1：
The method be the same as Example 1 of feeding chute is prepared with the castable, its main physical and chemical index is as follows：
Embodiment 3
A kind of castable for preparing converter flue feeding chute, its composition of raw materials is shown in Table 1：
The method be the same as Example 1 of feeding chute is prepared with the castable, its main physical and chemical index is as follows：
Embodiment 4
A kind of castable for preparing converter flue feeding chute, its composition of raw materials is shown in Table 1：
The method be the same as Example 1 of feeding chute is prepared with the castable, its main physical and chemical index is as follows：
The composition of raw materials table of 1 embodiment of table 1~4
Unit：Percentage by weight (%)
Embodiment 5
A kind of castable for preparing converter flue feeding chute, its composition of raw materials is shown in Table 2：
The method be the same as Example 1 of feeding chute is prepared with the castable, its main physical and chemical index is as follows：
Embodiment 6
A kind of castable for preparing converter flue feeding chute, its composition of raw materials is shown in Table 2：
The method be the same as Example 1 of feeding chute is prepared with the castable, its main physical and chemical index is as follows：
Embodiment 7
A kind of castable for preparing converter flue feeding chute, its composition of raw materials is shown in Table 2：
The method be the same as Example 1 of feeding chute is prepared with the castable, its main physical and chemical index is as follows：
Embodiment 8
A kind of castable for preparing converter flue feeding chute, its composition of raw materials is shown in Table 2：
The method be the same as Example 1 of feeding chute is prepared with the castable, its main physical and chemical index is as follows：
The composition of raw materials table of 2 embodiment of table 5~8
Unit：Percentage by weight (%)
It is the feeding chute intensity height that is prepared using the castable of the present invention, high temperature resistant, resistance to from embodiments of the invention
Friction, anti-slag, high-temperature gas erosiveness are strong, and compared with existing steel, feeding chute service life can be greatly improved, cost
It is greatly lowered, and in the absence of seepy question.
Certainly, the present invention can also have various embodiments, in the case of without departing substantially from spirit of the invention and its essence, be familiar with
Those skilled in the art can make various corresponding changes and deformation according to disclosure of the invention, but these it is corresponding change and
Deformation should all belong to the scope of the claims of the present invention.
Claims (7)
1. a kind of converter flue feeding chute castable, it is characterised in that the component of the castable raw material is by weight percentage
Including：
Wherein, the water reducer is sodium lignin sulfonate.
2. castable according to claim 1, it is characterised in that the component of the castable raw material is wrapped by weight percentage
Include：
3. castable according to claim 2, it is characterised in that the component of the castable raw material is wrapped by weight percentage
Include：
4. castable according to claim 3, it is characterised in that the component of the castable raw material is wrapped by weight percentage
Include：
5. a kind of preparation method of any described castables of claim 1-4, comprises the following steps：
1) various raw materials are weighed in proportion, are mixed 3~5 minutes, obtain compound；
2) water of compound gross weight 4%~6% is added, continues to mix 2~3 minutes, castable is made.
6. a kind of converter flue feeding chute, it is characterised in that the feeding chute is by any described cast of claim 1-4
Material cast is prepared from.
7. converter flue feeding chute preparation method, comprises the following steps described in a kind of claim 6：
1) vibrating forming in the mould for having fixed any described castable injections of claim 1-4；
2) by step 1) model of moulding by casting is stripped after conserving 2 days, baking 48 hours is carried out at 110 DEG C, then again in height
24 hours are incubated at a temperature of 1650 DEG C in warm stove, feeding chute is made after natural cooling.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510554719.4A CN105236996B (en) | 2015-09-02 | 2015-09-02 | A kind of converter flue feeding chute castable and preparation method thereof |
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| CN201510554719.4A CN105236996B (en) | 2015-09-02 | 2015-09-02 | A kind of converter flue feeding chute castable and preparation method thereof |
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| CN105236996B true CN105236996B (en) | 2017-10-03 |
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| CN113200753B (en) * | 2021-04-14 | 2023-04-25 | 山西昊业新材料开发有限公司 | Tundish cover castable and method for preparing tundish cover by using same |
| CN115650703A (en) * | 2022-11-04 | 2023-01-31 | 辽宁利尔镁质合成材料股份有限公司 | Magnesium castable and preparation method thereof |
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| CN102010217B (en) * | 2010-12-28 | 2012-12-26 | 河南省耕生耐火材料有限公司 | Spray paint for ladle hot-spraying |
| CN103242049A (en) * | 2013-05-08 | 2013-08-14 | 绵阳汇丰炉窑材料有限公司 | Foam light refractory casting material and preparation method thereof |
| CN103467120B (en) * | 2013-08-29 | 2015-01-21 | 浙江长兴强立耐火材料有限公司 | Non-phosphorus and low-carbon alumina-magnesia unburned brick for stainless steel ladle and manufacturing method of brick |
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