CN108002853A - A kind of converter extracting vanadium gunning refractory and preparation method thereof - Google Patents
A kind of converter extracting vanadium gunning refractory and preparation method thereof Download PDFInfo
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- CN108002853A CN108002853A CN201711260987.0A CN201711260987A CN108002853A CN 108002853 A CN108002853 A CN 108002853A CN 201711260987 A CN201711260987 A CN 201711260987A CN 108002853 A CN108002853 A CN 108002853A
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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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- C—CHEMISTRY; METALLURGY
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3206—Magnesium oxides or oxide-forming salts thereof
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- C—CHEMISTRY; METALLURGY
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3208—Calcium oxide or oxide-forming salts thereof, e.g. lime
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
- C04B2235/3222—Aluminates other than alumino-silicates, e.g. spinel (MgAl2O4)
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3418—Silicon oxide, silicic acids, or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3427—Silicates other than clay, e.g. water glass
- C04B2235/3436—Alkaline earth metal silicates, e.g. barium silicate
- C04B2235/3445—Magnesium silicates, e.g. forsterite
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/349—Clays, e.g. bentonites, smectites such as montmorillonite, vermiculites or kaolines, e.g. illite, talc or sepiolite
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
- C04B2235/447—Phosphates or phosphites, e.g. orthophosphate, hypophosphite
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Abstract
Disclosed by the invention is a kind of converter extracting vanadium gunning refractory of metallurgical technical field of refractory materials and preparation method thereof, and converter extracting vanadium gunning refractory includes the component of following weight percentage：Magnesium olive sand particle：55~65%, magnesium powder is sintered：25~30%, Guangxi white clay 2~5%, silica dust powder 1~3%, high alumina cement 3~5%, technical grade calgon 3~5%.Satisfactory magnesium olive sand, sintering magnesium powder, Guangxi white clay, silica dust powder, calgon are chosen during preparation first to weigh by weight percentage, converter extracting vanadium gunning refractory is made in jumbo bag packaging after being then stirred material mixing.The beneficial effects of the invention are as follows：The gel formed using sintering oxidation magnesium powder, Guangxi white clay, silica dust powder, calgon, in spray attachment magnesium olive sand particulate material can be wrapped up well initial stage, so that spray attachment is more uniformly distributed, spray attachment power is good and is not easy to plug spray gun, converter service life can be extended, reduce maintenance cost.
Description
Technical field
The present invention relates to metallurgical technical field of refractory materials, and in particular to a kind of converter extracting vanadium gunning refractory and its preparation side
Method.
Background technology
Using bessemerize be at present from molten iron extract vanadium slag main method, steel is being climbed, although the mist of domestic initiation
Change process for extracting vanadium and be made that indelible contribution for the comprehensive utilization of Panzhihua vanadium titanium, but eventually because processing time is long, vanadium slag titaniferous
High, the shortcomings of grade is unstable, is replaced by vanadium extraction by converter blowing.For magnesia carbon brick, its damage includes the material that converter extracting vanadium furnace lining uses
Four aspects, damage journey of each position of furnace lining in terms of by aforementioned four are peeled off in mechanical erosion, high temperature melting loss, chemical erosion and contraction
Degree differs, and iron making side is larger because being subject to molten iron and pig iron impact, can occur pit too early；Shaft gudgeon side is difficult in maintenance, again
Do not hang clinker, when blowing will be whole furnace lining most weakness, it is necessary to the method for often using spray repair to gudgeon and slag lining
Repairing.15-20 stoves are often made steel in converter mostly domestic at present must just carry out furnace bottom and the repairing of big face, often make steel 20 stoves and just carry out stove
Body gudgeon spray repair.
Repaired when pit occurs in Xichang steel vanadium steel mill converter extracting vanadium iron making side using gravity flow mending material, shaft gudgeon
Locate to be repaired using gunning refractory during thinner thickness, spray repair mode carries out hot spray attachment using spray gun；Now current gunning refractory spray repair
Adhesive force deficiency, is frequently occluded spray gun during gudgeon side.Problem above not only adds converter extracting vanadium maintenance cost, and every now and then
It has impact on process for making rhythm.
The content of the invention
To overcome existing converter extracting vanadium feed supplement above shortcomings, the technical problems to be solved by the invention are：There is provided
It is a kind of spray strong adhesive force, the service life is high, the converter extracting vanadium gunning refractory that does not block spray gun and preparation method thereof.
The technical solution adopted by the present invention to solve the technical problems is：
A kind of converter extracting vanadium gunning refractory, the converter extracting vanadium gunning refractory include the component of following weight percentage：Magnesium olive
Sand particle：55~65%, magnesium powder is sintered：25~30%, Guangxi white clay 2~5%, silica dust powder 1~3%, high alumina cement 3~5%,
Technical grade calgon 3~5%.
It is further that the chemical composition of the converter extracting vanadium gunning refractory is by weight percentage：MgO >=70%,
SiO2>=10%, CaO≤1%.
It is further that the magnesium olive sand particle includes two kinds of particle diameters, the magnesium olive sand particle of wherein 1~3mm of particle diameter
The 30~35% of raw material gross mass are accounted for, the magnesium olive sand particle of 1~0.074mm of particle diameter accounts for the 25~30% of raw material total amount, remaining
Raw material particle size is no more than 0.074mm.
It is further that the magnesium olive sand contains MgO >=45% by weight, the sintering magnesium powder contains MgO by weight
>=90%, the Guangxi white clay contains Al by weight2O3>=30%, SiO2≤ 45%, the silica dust powder contains SiO by weight2≥
94%, the high alumina cement contains Al by weight2O3>=50%, it is HG/T2837- that the calgon, which corresponds to national standard,
1997, the sum of each feed moisture content≤1%.
The preparation method of converter extracting vanadium gunning refractory, comprises the following steps：
A, satisfactory magnesium olive sand, sintering magnesium powder, Guangxi white clay, silica dust powder, calgon are chosen, then by weight
Amount percentage weighs each raw material；
B, the magnesium olive sand that two kinds of particle diameters are first added in mixer is mixed, and is then sequentially added while agitating
Sinter magnesium powder, Guangxi white clay, silica dust powder, high alumina cement, technical grade calgon；
C, converter extracting vanadium gunning refractory is made in jumbo bag packaging after all materials mixing.
It is further that when being mixed in stepb to the magnesium olive sand of two kinds of particle diameters, 2~3min of mixing time, adds
It is 3~5min to enter to sinter the mixing time after magnesium powder, Guangxi white clay, silica dust powder, high alumina cement, technical grade calgon, control
It is 5~8min to make total mixing time.
The beneficial effects of the invention are as follows：Formed using sintering oxidation magnesium powder, Guangxi white clay, silica dust powder, calgon
Gel, can wrap up magnesium olive sand particulate material well so that spray attachment is more uniformly distributed, spray attachment power is good and is not easy initial stage in spray attachment
Spray gun is blocked, which can firmly be attached in the pit of converter iron making side and gudgeon side, simultaneous oxidation
Magnesium is good refractory material, can extend converter service life, reduces maintenance cost, has good economic value.
Embodiment
With reference to embodiment, the invention will be further described.
A kind of claimed converter extracting vanadium gunning refractory of the present invention, includes the component of following weight percentage：Magnesium olive sand
Particle：55~65%, magnesium powder is sintered：25~30%, Guangxi white clay 2~5%, silica dust powder 1~3%, high alumina cement 3~5%, work
Industry level calgon 3~5%.In raw material selection, MgO is provided using magnesium olive sand, sintering magnesium powder, wherein most is adopted
With magnesium olive sand, because it is with fusing point is high, hot melt is big, low thermal conductivity, the coefficient of expansion is low, resistance to slag is strong, it is excellent to be not easy aquation etc.
Point, and refractoriness may be up to 1710 DEG C, disclosure satisfy that converter lining requirement.It is to improve spray repair using high alumina cement
Expect the intensity at spray attachment initial stage, which can use CA60 cement.Using calgon be capable of providing initial stage sintering and
Power is attached, gunning refractory is quickly combined with converter lining.
In order to meet the intensity of converter lining material and corrosion-resistant requirement, the chemical composition of the converter extracting vanadium gunning refractory is pressed
Percentage by weight meter should meet：MgO >=70%, SiO2>=10%, CaO≤1%.
Further, the magnesium olive sand particle includes two kinds of particle diameters, and the magnesium olive sand particle of wherein 1~3mm of particle diameter accounts for
The 30~35% of raw material gross mass, the magnesium olive sand particle of 1~0.074mm of particle diameter account for the 25~30% of raw material total amount, remaining is former
Expect particle diameter no more than 0.074mm.It is on the one hand that ensure that gunning refractory integral strength using the magnesium olive sand of two kinds of particle diameters
Production cost can be reduced at the same time, is on the other hand that can improve the corrosion resistant ability of gunning refractory.Remaining raw material particle size is little
In 0.074mm, the wherein best ＜ 0.05mm of high alumina cement, granularity is thinner can to make obtained gel finer and smoother, be not easy to plug
Gun slot.
In order to be adapted with the chemical composition required by converter gunning, for the following institute of chemical composition content of each raw material
State：The magnesium olive sand contains MgO >=45% by weight, and the sintering magnesium powder contains MgO >=90%, the Guangxi White by weight
Mud contains Al by weight2O3>=30%, SiO2≤ 45%, the silica dust powder contains SiO by weight2>=94%, the high alumina cement
Contain Al by weight2O3>=50%, it is HG/T2837-1997 that the calgon, which corresponds to national standard, each feed moisture content it
With≤1%.
The preparation method of converter extracting vanadium gunning refractory, comprises the following steps：
A, satisfactory magnesium olive sand, sintering magnesium powder, Guangxi white clay, silica dust powder, calgon are chosen, then by weight
Amount percentage weighs each raw material；
B, the magnesium olive sand that two kinds of particle diameters are first added in mixer is mixed, and is then sequentially added while agitating
Sinter magnesium powder, Guangxi white clay, silica dust powder, high alumina cement, technical grade calgon；
C, converter extracting vanadium gunning refractory is made in jumbo bag packaging after all materials mixing.
It is further that when being mixed in stepb to the magnesium olive sand of two kinds of particle diameters, 2~3min of mixing time, adds
It is 3~5min to enter to sinter the mixing time after magnesium powder, Guangxi white clay, silica dust powder, high alumina cement, technical grade calgon, control
It is 5~8min to make total mixing time.
The present invention prepares gained converter extracting vanadium gunning refractory and meets following physical and chemical index：
1 converter extracting vanadium gunning refractory physical and chemical index of table
The present invention is illustrated below by way of specific embodiment.
Magnesium olive sand, sintering magnesium powder, silica dust powder, Guangxi white clay, CA60 cement employed in following two embodiments refer to
Mark detection case is shown in Table 2：
Converter extracting vanadium gunning refractory raw material inspection result is used in the experiment of table 2
The technical indicator of six kinds of raw materials in embodiment：Magnesium olive sand contains magnesia >=45%, its granularity difference by weight
For 1-3mm, 0.074mm-1mm；The sintering magnesium powder contains magnesia >=90%, its granularity 0.074mm by weight；Described is wide
Western white clay contains alundum (Al2O3) >=30%, silica≤45% by weight, its granularity is ＜ 0.074mm；The silica dust
Powder contains alundum (Al2O3) >=98% by weight, its granularity is ＜ 0.005mm；The CA-60 cement is calcium aluminate series cement, is pressed
Weight meter contains alundum (Al2O3) >=50%, calcium oxide≤25%, its granularity is ＜ 0.05mm.
Embodiment 1
The 3mm-1mm magnesium olives sand of 33 qualified parts by weight, the 1-0.074mm magnesium olives sand of 29 parts by weight will be examined to be sent into
It is mixed in drum mixer, after 2min is mixed, 0.074mm sintering magnesium powder, 3 parts by weight of 28 parts by weight
0.074mm Guangxi white clay, the 0.074mm silica dust powder of 1 parts by weight, the 0.074mm high alumina A60 cement of 3 parts by weight, 3 parts by weight
Technical grade six be sent into drum mixer and be mixed partially, after 4min is mixed, the material of mixing is passed through
Triple valve discharging device is put into dry jumbo bag packaging bag, is packed by 500Kg/ bags, fasten opening indication storage it is spare,
The physical and chemical index (testing result is shown in Table 3) of sampling detection converter extracting vanadium gunning refractory, blast furnace slag Treatment stations are transported to after detection is qualified again
Ground is used.
The hot spray repair of pit uses the present embodiment converter extracting vanadium gunning refractory as refractory casting material at converter extracting vanadium gudgeon,
This is sent to 3 tons of converter extracting vanadium gunning refractories of converter extracting vanadium, have collected 3 experiment spray repair data and is contrasted with former spray repair data, 3
When testing spray repair, spray repair adhesion is good, block spray gun 0, the relatively contrast gunning refractory service life of service life 25 times improves 3 times for 22 times
Application effect is good.
3 embodiment of table, 1 converter extracting vanadium gunning refractory Physico-chemical tests index
| Project | Testing result % |
| MgO, % | 53.72 |
| CaO, % | 1.2 |
| Bulk density (110 DEG C × 24h), g/cm3 | 2.52 |
| Refractoriness, DEG C | 1700 |
| Compressive resistance (1350 DEG C × 3h), MPa | 65 |
| Cold crushing strength (110 DEG C × 24h), MPa | 43 |
| Strength at normal temperature (110 DEG C × 3h), MPa | 4.3 |
| Strength at normal temperature (1350 DEG C × 3h), MPa | 9.1 |
| Linear change rate (1350 DEG C × 3h), % | -0.13 |
Embodiment 2
The 3mm-1mm magnesium olives sand of 30 qualified parts by weight, the 1-0.074mm magnesium olives sand of 27 parts by weight will be examined to be sent into
It is mixed in drum mixer, after 2min is mixed, 0.074mm sintering magnesium powder, 4 parts by weight of 29 parts by weight
0.074mm Guangxi white clay, the 0.074mm silica dust powder of 2 parts by weight, the 0.074mm high alumina A60 cement of 5 parts by weight, 3 parts by weight
Technical grade six be sent into drum mixer and be mixed partially, after 4min is mixed, the material of mixing is passed through
Triple valve discharging device is put into dry jumbo bag packaging bag, is packed by 500Kg/ bags, fasten opening indication storage it is spare,
The physical and chemical index (testing result is shown in Table 3) of sampling detection converter extracting vanadium gunning refractory, blast furnace slag Treatment stations are transported to after detection is qualified again
Ground is used.
The hot spray repair of pit uses the present embodiment converter extracting vanadium gunning refractory as refractory casting material at converter extracting vanadium gudgeon,
This is sent to 3 tons of converter extracting vanadium gunning refractories of converter extracting vanadium, have collected 3 experiment spray repair data and is contrasted with former spray repair data, 3
When testing spray repair, spray repair adhesion is good, block spray gun 0, the relatively contrast gunning refractory service life of service life 25 times improves 4.5 22 times
Secondary application effect is good.
4 embodiment of table, 2 converter extracting vanadium gunning refractory Physico-chemical tests index
| Project | Testing result % |
| MgO, % | 52.61 |
| CaO, % | 1.4 |
| Bulk density (110 DEG C × 24h), g/cm3 | 2.6 |
| Refractoriness, DEG C | 1710 |
| Compressive resistance (1350 DEG C × 3h), MPa | 69 |
| Cold crushing strength (110 DEG C × 24h), MPa | 41 |
| Strength at normal temperature (110 DEG C × 3h), MPa | 4.7 |
| Strength at normal temperature (1350 DEG C × 3h), MPa | 9.05 |
| Linear change rate (1350 DEG C × 3h), % | 0.1 |
The content of background technology and embodiment 1,2 according to the present invention can be drawn：Converter extracting vanadium gunning refractory of the present invention
Applicable cases are good at converter extracting vanadium gudgeon, spray attachment is good, and the service life cycle rises appreciably, and does not block spray gun, application
Have a extensive future.
Claims (6)
1. a kind of converter extracting vanadium gunning refractory, it is characterized in that：The converter extracting vanadium gunning refractory includes the component of following weight percentage：
Magnesium olive sand particle：55~65%, magnesium powder is sintered：25~30%, Guangxi white clay 2~5%, silica dust powder 1~3%, high alumina cement 3
~5%, technical grade calgon 3~5%.
2. converter extracting vanadium gunning refractory as claimed in claim 1, it is characterized in that：The chemical composition of the converter extracting vanadium gunning refractory is pressed
Percentage by weight is calculated as：MgO >=70%, SiO2>=10%, CaO≤1%.
3. converter extracting vanadium gunning refractory as claimed in claim 1, it is characterized in that：The magnesium olive sand particle includes two kinds of particle diameters,
The magnesium olive sand particle of wherein 1~3mm of particle diameter accounts for the 30~35% of raw material gross mass, the magnesium olive sand of 1~0.074mm of particle diameter
Grain accounts for the 25~30% of raw material total amount, remaining raw material particle size is no more than 0.074mm.
4. converter extracting vanadium gunning refractory as claimed in claim 3, it is characterized in that：The magnesium olive sand by weight containing MgO >=
45%, the sintering magnesium powder contains MgO >=90% by weight, and the Guangxi white clay contains Al by weight2O3>=30%, SiO2≤
45%, the silica dust powder contains SiO by weight2>=94%, the high alumina cement contains Al by weight2O3>=50%, described six is inclined
It is the sum of HG/T2837-1997, each feed moisture content≤1% that sodium phosphate, which corresponds to national standard,.
5. the preparation method of the converter extracting vanadium gunning refractory as described in claim 3 or 4, it is characterized in that, comprise the following steps：
A, satisfactory magnesium olive sand, sintering magnesium powder, Guangxi white clay, silica dust powder, calgon are chosen, then by weight hundred
Each raw material of comparison is divided to weigh；
B, the magnesium olive sand that two kinds of particle diameters are first added in mixer is mixed, and then sequentially adds sintering while agitating
Magnesium powder, Guangxi white clay, silica dust powder, high alumina cement, technical grade calgon；
C, converter extracting vanadium gunning refractory is made in jumbo bag packaging after all materials mixing.
6. the preparation method of converter extracting vanadium gunning refractory as claimed in claim 5, it is characterized in that：In stepb to two kinds of particle diameters
Magnesium olive sand when being mixed, 2~3min of mixing time, adds sintering magnesium powder, Guangxi white clay, silica dust powder, high alumina cement, work
Mixing time after industry level calgon is 3~5min, and it is 5~8min to control total mixing time.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111908903A (en) * | 2020-06-16 | 2020-11-10 | 浙江攀盛冶金材料有限公司 | Aluminum-magnesium ramming mass |
| CN112225541A (en) * | 2020-09-25 | 2021-01-15 | 攀钢集团攀枝花钢铁研究院有限公司 | Electric furnace gunning material and gunning furnace protection method |
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| CN111908903A (en) * | 2020-06-16 | 2020-11-10 | 浙江攀盛冶金材料有限公司 | Aluminum-magnesium ramming mass |
| CN112225541A (en) * | 2020-09-25 | 2021-01-15 | 攀钢集团攀枝花钢铁研究院有限公司 | Electric furnace gunning material and gunning furnace protection method |
| CN112225541B (en) * | 2020-09-25 | 2022-06-03 | 攀钢集团攀枝花钢铁研究院有限公司 | Electric furnace gunning material and gunning furnace protection method |
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