CN109987951A - The production method of clean steel smelting slag blocking dart - Google Patents
The production method of clean steel smelting slag blocking dart Download PDFInfo
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- CN109987951A CN109987951A CN201910332465.XA CN201910332465A CN109987951A CN 109987951 A CN109987951 A CN 109987951A CN 201910332465 A CN201910332465 A CN 201910332465A CN 109987951 A CN109987951 A CN 109987951A
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- slag blocking
- blocking dart
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- dart
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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
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/62204—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products using waste materials or refuse
-
- 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
-
- 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
- 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
-
- 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
- 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
- C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3272—Iron oxides or oxide forming salts thereof, e.g. hematite, magnetite
-
- 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
- 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
-
- 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
- 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
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/74—Physical characteristics
- C04B2235/77—Density
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
Abstract
The invention discloses a kind of production methods of clean steel smelting slag blocking dart, it is to be prepared by the liquid soluble glass of 32 ~ 46 parts of raw material reheating magnesia, 50 ~ 60 parts of tin iron, 3 ~ 5 parts of silicon powder and raw material total amount 3.8 ~ 4.4%: all raw materials is poured into dry-mixed in blender, add liquid soluble glass stirring, uniform mixed material pours into mold, after being pressed into semi-finished blank, natural curing 12h is re-fed into the dry 24 ~ 36h of 200 DEG C of baking rooms and gets product slag blocking dart.Slag blocking dart produced by the invention uses magnesia raw material and silicon powder, and the refractoriness of slag blocking dart can be improved in the olivine that magnesium silicon high temperature generates；The iron tramp recycled when using metallurgical fused brown corundum improves the bulk density of slag blocking dart as slag blocking dart counterweight；Make bonding agent using waterglass, cement can be reduced and combine the calcium oxide impurity brought into；Blank uses press machine compression moulding, and blank stomata is small, and density is big, and the anti-slag for improving finished product slag blocking dart invades effect.
Description
Technical field
The present invention relates to coverter pig slag blocking darts, more particularly, to a kind of producer of converter smelting clean steel slag blocking dart
Method.
Background technique
Slag blocking dart is pneumatic steelmaking one of important resistance to material, for separating molten steel and clinker in converter, clinker is stopped to enter
In the next process of steel-making, it is mainly used for improving the quality of steel.
With the continuous development of steel-making metallurgical technology, the type of Clean Steel Smelting is more and more, to the quality requirements of steel
Also higher and higher.In order to improve steel quality, will further tighten control to the links in steelmaking process.
Slag blocking dart is the very important articles of resistance to material of one kind used in pneumatic steelmaking, due to steel slag density be 2.6 ~
2.8g/cm3, molten steel density is 7.8 ~ 8.0 g/cm3, it requires the density of slag blocking dart in 3.5 ~ 4.5 g/cm3.Traditional pushing off the slag
It is main raw material(s) that boomerang, which is with high aluminium material, tin iron, silicon powder, is poured using high alumina cement as bonding agent.Due to original used
Impurities of materials ingredient is more and uses moulding by casting, so that the refractoriness and density of finished product slag blocking dart are relatively relatively low, (refractoriness does not surpass
1680 DEG C are crossed, density is generally in 3.7 ~ 3.9g/cm3), molten steel and clinker cannot be efficiently separated, the smelting of clean steel is unfavorable for.
Summary of the invention
The purpose of the present invention is to provide the clean steel smelting use that a kind of refractoriness and bulk density are greatly improved
The production method of slag blocking dart.
To achieve the above object, the present invention can take following technical proposals:
The production method of cleaning steel smelting slag blocking dart of the present invention, is by raw material reheating magnesia, tin iron, silicon powder and liquid
Body waterglass is prepared according to following weight parts proportion and method:
Raw material proportioning:
50 ~ 60 parts of the tin iron particle of 0 ~ 8mm of granularity,
7 ~ 10 parts of the reheating magnesia particle of 3 ~ 5mm of granularity,
7 ~ 10 parts of the reheating magnesia particle of 1 ~ 3mm of granularity,
3 ~ 6 parts of the reheating magnesia particle of 0 ~ 1mm of granularity,
15 ~ 20 parts of the reheating magnesia powder of 200 mesh,
3 ~ 5 parts of 0.5 ~ 1 μm of silicon powder,
The liquid soluble glass of above-mentioned raw materials total amount 3.8 ~ 4.4%；
Preparation method:
The particulate material of precise and powder are poured into dry-mixed certain time in blender first, add raw material total amount 3.8 ~
4.4% liquid soluble glass continues to be stirred；Uniform mixed material is poured into mold, is pressed into half using 800T press machine
After finished product blank, natural curing 12h is re-fed into the dry 24 ~ 36h of 200 DEG C of baking rooms and gets product slag blocking dart.
For the quality requirement for guaranteeing finished product slag blocking dart, MgO >=88wt% in the reheating magnesia, SiO in the silicon powder2
≥94wt%。
The density of the liquid soluble glass is 1.45 ~ 1.50g/cm3。
To reduce manufacturing cost, the iron tramp recycled when metallurgical fused brown corundum is can be used in the tin iron, wherein Fe2O3≥
95wt%, density are not less than 6.8g/cm3。
After tested, the physical and chemical index of finished product slag blocking dart produced by the invention are as follows:
Slag blocking dart produced by the invention uses magnesia raw material (reheating magnesia) and silicon powder, and the olivine that magnesium silicon high temperature generates can mention
The refractoriness of high slag blocking dart improves the pushing off the slag effect of slag blocking dart；The iron tramp recycled when using metallurgical fused brown corundum -- tin
Counterweight of the iron as slag blocking dart, improves the bulk density of slag blocking dart；Make bonding agent using waterglass, it is possible to reduce cement combines
The calcium oxide impurity brought into；Semi-finished blank uses press machine compression moulding, and blank stomata is small, and density compares moulding by casting
Greatly, the anti-slag for improving finished product slag blocking dart invades effect；It can guarantee finished product slag blocking dart molten steel and clinker in converter in use
Be sufficiently separated, meet the quality requirements of Clean Steel Smelting.
Specific embodiment
More detailed explanation is done to the present invention below by specific embodiment, in order to the reason of those skilled in the art
Solution.
Embodiment 1 produces a kind of clean steel smelting slag blocking dart
1, raw material proportioning:
The tin iron particle 60% of 0 ~ 8mm of granularity,
The reheating magnesia particle 7% of 3 ~ 5mm of granularity,
The reheating magnesia particle 7% of 1 ~ 3mm of granularity,
The reheating magnesia particle 6% of 0 ~ 1mm of granularity,
The reheating magnesia powder 15% of 200 mesh,
0.5 ~ 1 μm of silicon powder 5%,
The liquid soluble glass of raw materials used total amount 3.9%；
2, preparation method:
The varigrained reheating magnesia particulate material and powder of precise and tin iron particle material, silicon powder are fallen together first
Enter in forced stirrer dry-mixed 5 ~ 7 minutes, the liquid soluble glass for adding raw material total amount 3.9% continues to stir into uniform mixing
Material；Uniform mixed material is poured into mold, after being pressed into semi-finished blank using 800T press machine, natural curing 12h, then
It is sent into the dry 24 ~ 36h of 200 DEG C of baking rooms and obtains finished product slag blocking dart.
It is detected, the technical indicator for the finished product slag blocking dart produced is as follows:
。
Embodiment 2 produces a kind of clean steel smelting slag blocking dart
1, raw material proportioning:
The tin iron particle 55% of 0 ~ 8mm of granularity,
The reheating magnesia particle 9% of 3 ~ 5mm of granularity,
The reheating magnesia particle 10% of 1 ~ 3mm of granularity,
The reheating magnesia particle 3% of 0 ~ 1mm of granularity,
The reheating magnesia powder 20% of 200 mesh,
0.5 ~ 1 μm of silicon powder 3%,
The liquid soluble glass of raw materials used total amount 4.1%.
2, preparation method:
With embodiment 1.
It is detected, the technical indicator for the finished product slag blocking dart produced is as follows:
。
Embodiment 3 produces a kind of clean steel smelting slag blocking dart
1, raw material proportioning:
The tin iron particle 50% of 0 ~ 8mm of granularity,
The reheating magnesia particle 10% of 3 ~ 5mm of granularity,
The reheating magnesia particle 10% of 1 ~ 3mm of granularity,
The reheating magnesia particle 5% of 0 ~ 1mm of granularity,
The reheating magnesia powder 20% of 200 mesh,
0.5 ~ 1 μm of silicon powder 5%,
The liquid soluble glass of raw materials used total amount 4.3%；
2, preparation method:
With embodiment 1.
It is detected, the technical indicator for the finished product slag blocking dart produced is as follows:
It is raw materials used to be adjusted in range disclosed by the invention when actual production, the slag blocking dart finished product produced
Index can meet production requirement.
Can be seen that finished product slag blocking dart produced by the invention by above-mentioned specific embodiment, refractoriness by originally less than
1680 DEG C are increased to 1730 DEG C or more, while product density is by 3.7 original ~ 3.9g/cm3It is increased to 3.9 ~ 4.4g/cm3, fire resisting
Degree and density are greatly improved.
Use example:
Slag blocking dart produced by the invention refines clean steel in certain steel mill 100t converter at home, and sulphur phosphorus content is by original in molten steel
0.08% be reduced to 0.05%；Slag blocking dart produced by the invention refines clean steel, sulphur in molten steel in certain steel mill 40t converter at home
Phosphorus content is reduced to 0.06% by original 0.09%, it can be seen that slag blocking dart pushing off the slag effect highly significant produced by the invention.
Claims (4)
1. a kind of production method of cleaning steel smelting slag blocking dart, it is characterised in that: be micro- by raw material reheating magnesia, tin iron, silicon
Powder and additive liquid soluble glass are prepared according to following weight parts proportion and method:
Raw material proportioning:
50 ~ 60 parts of the tin iron particle of 0 ~ 8mm of granularity,
7 ~ 10 parts of the reheating magnesia particle of 3 ~ 5mm of granularity,
7 ~ 10 parts of the reheating magnesia particle of 1 ~ 3mm of granularity,
3 ~ 6 parts of the reheating magnesia particle of 0 ~ 1mm of granularity,
15 ~ 20 parts of the reheating magnesia powder of 200 mesh,
3 ~ 5 parts of 0.5 ~ 1 μm of silicon powder,
Additive is the liquid soluble glass of raw material total amount 3.8 ~ 4.4%；
Preparation method:
The particulate material of precise and powder are poured into dry-mixed certain time in blender first, add raw material total amount 3.8 ~
4.4% liquid soluble glass continues to be stirred；Uniform mixed material is poured into mold, is pressed into half using 800T press machine
After finished product blank, natural curing 12h is re-fed into the dry 24 ~ 36h of 200 DEG C of baking rooms and gets product slag blocking dart.
2. the production method of cleaning steel smelting slag blocking dart according to claim 1, it is characterised in that: the reheating magnesia
Middle MgO >=88wt%, SiO in the silicon powder2≥94wt%。
3. the production method of cleaning steel smelting slag blocking dart according to claim 1, it is characterised in that: the liquid water glass
The density of glass is 1.45 ~ 1.50g/cm3。
4. the production method of cleaning steel smelting slag blocking dart according to claim 1, it is characterised in that: the tin iron is smelting
The iron tramp of golden fused brown corundum recycling, wherein Fe2O3>=95wt%, density >=6.8g/cm3。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910332465.XA CN109987951A (en) | 2019-04-24 | 2019-04-24 | The production method of clean steel smelting slag blocking dart |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910332465.XA CN109987951A (en) | 2019-04-24 | 2019-04-24 | The production method of clean steel smelting slag blocking dart |
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| CN109987951A true CN109987951A (en) | 2019-07-09 |
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| CN201910332465.XA Pending CN109987951A (en) | 2019-04-24 | 2019-04-24 | The production method of clean steel smelting slag blocking dart |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1300649A (en) * | 2000-12-13 | 2001-06-27 | 宜兴耐火器材厂 | Slag-stopping plate for tundish in conticasing |
| CN102584305A (en) * | 2012-03-19 | 2012-07-18 | 苏州宝蠡耐火材料有限公司 | Floating plug |
| CN102659430A (en) * | 2012-04-23 | 2012-09-12 | 洛阳市科创耐火材料有限公司 | Silica sol combined magnesium tundish prefabricated member and manufacturing method thereof |
| CN102703642A (en) * | 2012-06-08 | 2012-10-03 | 郑州市瑞沃耐火材料有限公司 | Method for producing slag retaining spear for converter by using waste of smelteries |
| CN104446542A (en) * | 2014-11-25 | 2015-03-25 | 攀枝花钢城集团有限公司 | Slag retaining dart and preparation method thereof |
-
2019
- 2019-04-24 CN CN201910332465.XA patent/CN109987951A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1300649A (en) * | 2000-12-13 | 2001-06-27 | 宜兴耐火器材厂 | Slag-stopping plate for tundish in conticasing |
| CN102584305A (en) * | 2012-03-19 | 2012-07-18 | 苏州宝蠡耐火材料有限公司 | Floating plug |
| CN102659430A (en) * | 2012-04-23 | 2012-09-12 | 洛阳市科创耐火材料有限公司 | Silica sol combined magnesium tundish prefabricated member and manufacturing method thereof |
| CN102703642A (en) * | 2012-06-08 | 2012-10-03 | 郑州市瑞沃耐火材料有限公司 | Method for producing slag retaining spear for converter by using waste of smelteries |
| CN104446542A (en) * | 2014-11-25 | 2015-03-25 | 攀枝花钢城集团有限公司 | Slag retaining dart and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 袁林: "《绿色耐火材料》", 31 January 2015, 中国建材工业出版社 * |
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