CN108249936A - A kind of coverter pig magnesium chromium matter gunning refractory and preparation method thereof - Google Patents
A kind of coverter pig magnesium chromium matter gunning refractory and preparation method thereof Download PDFInfo
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- CN108249936A CN108249936A CN201810201605.5A CN201810201605A CN108249936A CN 108249936 A CN108249936 A CN 108249936A CN 201810201605 A CN201810201605 A CN 201810201605A CN 108249936 A CN108249936 A CN 108249936A
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- raw material
- sand
- gunning refractory
- magnesia
- coverter pig
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
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- Organic Chemistry (AREA)
- Ceramic Products (AREA)
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Abstract
The present invention relates to technical field of refractory materials more particularly to a kind of coverter pig magnesium chromium matter gunning refractory and preparation method thereof.Include the raw material of following parts by weight：10~35 parts of Cr20 sand；91 1~20 part of reheating magnesia；0.5~5 part of bonding agent；0.5~5 part of coagulant；0.5~8 part of additive；The bonding agent is one or more of calgon, sodium tripolyphosphate, sodium silicate, and the coagulant is calcium hydroxide, and the additive is one or more of alumina powder, silicon powder.The present invention use Cr20 sand and 91 magnesia for primary raw material, using ultra-fine alumina powder, silicon powder as additive, Gu resistant to corrosion and resistance to erosion ability are stronger, increase the service life of gunning refractory, improve the service efficiency of converter.
Description
Technical field
The present invention relates to technical field of refractory materials more particularly to a kind of coverter pig magnesium chromium matter gunning refractory and its preparation sides
Method.
Background technology
Converter lining is usually used with refractory material under relatively severe condition, this kind of refractory material when in use by containing
There is the corrosion function of the liquid slag of various chemical compositions.Converter at work generated gaseous material (such as SO2, SOs and
Water vapour) harmful effect is also generated to refractory lining.The reaction of above-mentioned substance occurs at 1100~1400 DEG C, separately
Outside, the cataclysm of temperature can also promote refractory material quickly to deteriorate.In order to slow down the erosion of converter lining, gunning refractory is used now
Converter lining is safeguarded.
And it leads coverter pig gunning refractory to be used at this stage and finds to have the following problems in use：1st, service life
It is short, 4~8 stoves once can only be generally used per spray repair, thus the service efficiency of steelmaking converter is affected.2nd, the anti-of gunning refractory is invaded
Erosion can force difference.3rd, resistance to erosion ability is poor.
Invention content
Resistance to material is consumed to slow down the erosion of converter lining and safeguarding, the present invention provides a kind of coverter pig magnesium chromium matter gunning refractory
And preparation method thereof.Resistant to corrosion and resistance to erosion ability are stronger, increase the service life of gunning refractory, improve the use effect of converter
Rate.
In order to achieve the above object, the present invention is realized using following technical scheme：
A kind of coverter pig magnesium chromium matter gunning refractory includes the raw material of following parts by weight：
The bonding agent is one or more of calgon, sodium tripolyphosphate, sodium silicate, and the coagulant is
Calcium hydroxide, the additive are one or more of alumina powder, silicon powder.
The Cr20 sand is mixed by the Cr20 sand of the variable grain rank of following parts by weight：15~35 parts of 1~3mm's
Cr20 sand, the Cr20 sand of 15~35 parts of 0~1mm, the Cr20 sand of 10~25 part of 200 mesh.
91 magnesia is mixed by 91 magnesia of the variable grain rank of following parts by weight：1~15 part of 0~1mm's
91 magnesia, 91 magnesia of 1~15 part of 200 mesh.
The bonding agent includes the raw material of following parts by weight：Calgon parts by weight are 0.5~5 part, sodium tripolyphosphate
Parts by weight are 0.5~5 part, sodium silicate parts by weight are 0.5~7 part.
The coagulant includes the raw material of following parts by weight：Calcium hydroxide parts by weight are 0.5~5 part；It is described addition include with
The raw material of lower parts by weight：Alumina powder parts by weight are 0.5~8 part of powder.
A kind of preparation method of coverter pig magnesium chromium matter gunning refractory, specifically comprises the following steps：
(1) raw material crush, sieve, fine grinding：Cr20 sand in crusher is crushed, is sieved as 0 ＜ granularities≤1mm, 1mm ＜
Raw material below granularity≤3mm, 200 mesh；91 magnesia in crusher are crushed, are sieved as 0 ＜ granularities≤1mm, 1mm ＜ granularities
Raw material below≤3mm, 200 mesh；
(2) dispensing：The formula weighs raw material；
(3) it is kneaded：The raw material of 0 ＜ granularities≤1mm and 1mm ＜ granularities≤3mm is first added in, then dry-mixed 2~4min is added in
Calgon, sodium tripolyphosphate, calcium hydroxide, alumina powder, sodium silicate, then mixed 3~5min, add in 200 powder materials, mix 4
~6min；
Compared with prior art, the beneficial effects of the invention are as follows：
The present invention uses Cr20 sand and 91 magnesia as primary raw material, using alumina powder, silicon powder as additive, Gu
Resistant to corrosion and resistance to erosion ability are stronger, increase the service life of gunning refractory, improve the service efficiency of converter.
Specific embodiment
Embodiment is being implemented down based on the technical solution of the present invention, gives detailed embodiment and specific
Operating process, but protection scope of the present invention is not limited to following embodiments.
Method therefor is conventional method unless otherwise instructed in following embodiments.
Embodiment：
1-3 of the embodiment of the present invention makes the formula such as table 1 of coverter pig gunning refractory using Cr20 sand and 91 magnesia as primary raw material
It is shown：
1 embodiment 1-3 of table makes the formula (unit of VOD ladle gunning refractories：%)
The preparation method that coverter pig gunning refractory is made using Cr20 sand and 91 magnesia as primary raw material of embodiment 1-3, including
Following steps：
1) raw material crush, sieve, fine grinding：
Cr20 sand in crusher is crushed, is sieved as below 0 ＜ granularities≤1mm, 1mm ＜ granularity≤3mm, 200 mesh
Raw material.
91 magnesia in crusher are crushed, are sieved as below 0 ＜ granularities≤1mm, 1mm ＜ granularity≤3mm, 200 mesh
Raw material.
Gunning refractory production is raw materials used：Cr20 sand and 91 magnesia.Feedstock specifications are shown in Table 2.
2 primary raw material index of table
2) dispensing：
Raw material is weighed by above-mentioned formula.
3) it is kneaded：
First plus then 3-1,1-0 granularity material, dry-mixed 3min add in calgon, sodium tripolyphosphate, calcium hydroxide, oxidation
Aluminium micro mist, sodium silicate, then mixed 3~5min, add in 200 powder materials, mix 4~6min, then discharge；
After discharging, Quality Inspector inspects the material by random samples, and sampling observation execution standard is shown in Table 3；
The physical and chemical index of 3 gunning refractory of table
| Project | Physical and chemical index |
| W (MgO)/% | ≥68 |
| w(SiO2)/% | ≤5 |
| w(Cr2O3)/% | ≤10 |
| Flexural strength/MPa (1500 DEG C × 3h) | ≥5.0 |
| Compressive resistance/MPa (1500 DEG C × 3h) | ≥20 |
| Flexural strength/MPa (110 DEG C × 8h) | ≥2.0 |
| Compressive resistance/MPa (110 DEG C × 8h) | ≥10 |
| Bulk density g/cm3 | ≥2.7 |
| Apparent porosity/% | ≤18 |
| Line variation/% (1500 DEG C × 3h) | 0~± 3 |
| Granularity (mm) | 0~3 |
| Adhesive rate/% | ≥90 |
Magnesian gunning refractory magnesium chromium matter gunning refractory has better using effect, because magchrome refractory is in addition to mainly containing
Have except periclase, also containing spinel solid solution, magnesiochro mite, magnesioferrite, Mg aluminate and with forsterite and calcium and magnesium
Silicate existing for olivine form.With concretion microstructure, and it is resistance to containing higher amount periclase and magnesia spinel
Effect is best to fiery material when in use.Such refractory material possesses the aggressivity of best anti-clinker.Therefore, when with magnesium chromium
When material does coverter pig gunning refractory, the erosion of converter lining can be slowed down.
The present invention uses Cr20 sand and 91 magnesia as primary raw material, using alumina powder, silicon powder as additive, Gu
Resistant to corrosion and resistance to erosion ability are stronger, increase the service life of gunning refractory, improve the service efficiency of converter.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (7)
1. a kind of coverter pig magnesium chromium matter gunning refractory, which is characterized in that include the raw material of following parts by weight：
The bonding agent is one or more of calgon, sodium tripolyphosphate, sodium silicate, and the coagulant is niter
Ash, the additive are alumina powder.
2. a kind of coverter pig magnesium chromium matter gunning refractory according to claim 1, which is characterized in that the Cr20 sand is by following heavy
The Cr20 sand for measuring the variable grain rank of part mixes：The Cr20 sand of 15~35 parts of 1~3mm, 15~35 parts of 0~1mm's
Cr20 sand, the Cr20 sand of 10~25 part of 200 mesh.
3. a kind of coverter pig magnesium chromium matter gunning refractory according to claim 1, which is characterized in that 91 magnesia is by following heavy
91 magnesia for measuring the variable grain rank of part mix：91 magnesia of 1~15 part of 0~1mm, 91 magnesium of 1~15 part of 200 mesh
Sand.
4. a kind of coverter pig magnesium chromium matter gunning refractory according to claim 1, which is characterized in that the bonding agent includes：Weight
Measure the calgon, the sodium tripolyphosphate that parts by weight are 0.5~5 part and bubble that parts by weight are 0.5~7 part that part is 0.5~5 part
Flower alkali.
5. a kind of coverter pig magnesium chromium matter gunning refractory according to claim 1, which is characterized in that the coagulant includes：Weight
Measure the calcium hydroxide that part is 0.5~5 part.
6. a kind of coverter pig magnesium chromium matter gunning refractory according to claim 1, which is characterized in that the additive includes weight
Part is 0.5~8 part of alumina powder.
7. a kind of preparation method of coverter pig magnesium chromium matter gunning refractory described in claim 1, which is characterized in that specifically include as follows
Step：
(1) raw material crush, sieve, fine grinding：It will be crushed, sieved as 0 ＜ granularities≤1mm, 1mm ＜ in crusher with rear magnesia brick
Raw material below degree≤3mm, 200 mesh；Will with rear Mg-Al spinel brick in crusher crush, sieve for 0 ＜ granularities≤1mm,
Raw material below 1mm ＜ granularities≤3mm, 200 mesh；
(2) dispensing：Formula weighs raw material as described in claim 1-6；
(3) it is kneaded：First plus the dry-mixed 2~4min of raw material of 1mm ＜ granularities≤3mm and 0 ＜ granularities≤1mm；Then six inclined phosphorus are added in
Sour sodium, sodium tripolyphosphate, calcium hydroxide, alumina powder, sodium silicate are kneaded 3~5min again；It adds in magnesia powder and is kneaded 4~6min,
Then it discharges.
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| CN201810201605.5A CN108249936A (en) | 2018-03-12 | 2018-03-12 | A kind of coverter pig magnesium chromium matter gunning refractory and preparation method thereof |
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| CN201810201605.5A CN108249936A (en) | 2018-03-12 | 2018-03-12 | A kind of coverter pig magnesium chromium matter gunning refractory and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109553398A (en) * | 2018-12-28 | 2019-04-02 | 海城利尔麦格西塔材料有限公司 | A kind of high life electric furnace thermal repairing material and preparation method |
| CN112142448A (en) * | 2020-09-30 | 2020-12-29 | 湖南湘钢瑞泰科技有限公司 | Gunning mix for converter steel tapping hole and preparation method thereof |
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| JPH05221711A (en) * | 1992-02-14 | 1993-08-31 | Nippon Steel Corp | Refractory base stock and refractory using the same |
| CN1524825A (en) * | 2003-02-28 | 2004-09-01 | 上海汇集新材料股份有限公司 | Gunning refractory of converter tap hole |
| CN102659432A (en) * | 2012-05-14 | 2012-09-12 | 攀枝花市银江金勇工贸有限责任公司 | Novel RH gunning refractory |
| CN107188549A (en) * | 2017-06-05 | 2017-09-22 | 武汉科技大学 | A kind of copper converter gunning refractory and preparation method thereof |
| CN107235712A (en) * | 2017-07-18 | 2017-10-10 | 海城市中兴镁质合成材料有限公司 | A kind of RH furnace bottom of fining furnace magnesium chromium matter ramming mass and its production method |
| CN107298587A (en) * | 2017-07-18 | 2017-10-27 | 海城市中兴高档镁质砖有限公司 | A kind of low stomata magnesite-chrome brick and its production method applied to coloured industry |
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2018
- 2018-03-12 CN CN201810201605.5A patent/CN108249936A/en active Pending
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| JPH05221711A (en) * | 1992-02-14 | 1993-08-31 | Nippon Steel Corp | Refractory base stock and refractory using the same |
| CN1524825A (en) * | 2003-02-28 | 2004-09-01 | 上海汇集新材料股份有限公司 | Gunning refractory of converter tap hole |
| CN102659432A (en) * | 2012-05-14 | 2012-09-12 | 攀枝花市银江金勇工贸有限责任公司 | Novel RH gunning refractory |
| CN107188549A (en) * | 2017-06-05 | 2017-09-22 | 武汉科技大学 | A kind of copper converter gunning refractory and preparation method thereof |
| CN107235712A (en) * | 2017-07-18 | 2017-10-10 | 海城市中兴镁质合成材料有限公司 | A kind of RH furnace bottom of fining furnace magnesium chromium matter ramming mass and its production method |
| CN107298587A (en) * | 2017-07-18 | 2017-10-27 | 海城市中兴高档镁质砖有限公司 | A kind of low stomata magnesite-chrome brick and its production method applied to coloured industry |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109553398A (en) * | 2018-12-28 | 2019-04-02 | 海城利尔麦格西塔材料有限公司 | A kind of high life electric furnace thermal repairing material and preparation method |
| CN112142448A (en) * | 2020-09-30 | 2020-12-29 | 湖南湘钢瑞泰科技有限公司 | Gunning mix for converter steel tapping hole and preparation method thereof |
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Application publication date: 20180706 |