CN107723577A - Semisteel smelting method - Google Patents
Semisteel smelting method Download PDFInfo
- Publication number
- CN107723577A CN107723577A CN201710827692.0A CN201710827692A CN107723577A CN 107723577 A CN107723577 A CN 107723577A CN 201710827692 A CN201710827692 A CN 201710827692A CN 107723577 A CN107723577 A CN 107723577A
- Authority
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- China
- Prior art keywords
- carburant
- tapping
- steel
- ladle
- molten steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000003723 Smelting Methods 0.000 title claims abstract description 26
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 89
- 239000010959 steel Substances 0.000 claims abstract description 89
- 238000010079 rubber tapping Methods 0.000 claims abstract description 58
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 26
- 239000000956 alloy Substances 0.000 claims abstract description 26
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 15
- 238000005303 weighing Methods 0.000 claims abstract description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- 239000005864 Sulphur Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 238000009628 steelmaking Methods 0.000 abstract description 3
- 235000010855 food raising agent Nutrition 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 229910001208 Crucible steel Inorganic materials 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 229920002165 CarbonCast Polymers 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002008 calcined petroleum coke Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000976 ink Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention discloses a semisteel smelting method, which is applied to the technical field of converter steelmaking and comprises the following steps: conveying the recarburizer from an underground storage bin of a steel plant to a middle alloy bin through a belt; tapping molten steel formed by smelting the semisteel into a semisteel ladle; starting alloy electric vibration corresponding to the middle alloy bin to feed a carburant from the stock in the middle alloy bin to an alloy weighing hopper, and weighing the dosage required by current tapping based on the alloy weighing hopper; and adding the carburant required by the current tapping into the semi-ladle when the molten steel amount from tapping to the semi-ladle reaches the preset tapping amount. The invention solves the technical problem that the semi-steel finished product produced by the converter has lower carbon content. The carbon content in the semisteel is increased. The adding mode of the carburant is simple, the carburant is melted quickly, and no additional implementation equipment is needed.
Description
Technical field
The present invention relates to converter steeling technology field, more particularly to a kind of semisteel smelting method.
Background technology
Half steel, it is a kind of carbon containing high hypereutectoid cast steel, this kind of high carbon cast steel has actually stretched into cast iron category, therefore is commonly called as
Half steel, it is commonly used to manufacture cast steel roll, referred to as ferrosteel roll.According to complete the three of steelmaking operations portion de- productive prospectings, half steel is
The product that dephosphorization stove is smelted, existing half steel carbon content fluctuation is in 2.8%-3.3% or so.In the prior art, blast fumance
The carbon content of molten iron maintains relatively low value, and the carbon content for the half steel finished product thus produced is than relatively low, it is impossible to meets decarburization
Stove terminal heat demand causes the rise of converter procedure cost, it is necessary to additionally add temperature raising agent.
The content of the invention
By providing a kind of semisteel smelting method, the carbon for solving the half steel finished product that converter producing goes out contains the embodiment of the present invention
Amount is than relatively low technical problem.
A kind of semisteel smelting method provided in an embodiment of the present invention, including：
By carburant, blanking bin is transported in middle position alloy storehouse by belt from steel mill；
The molten steel formed by semisteel smelting is tapped into half ladle；
Alloy electricity corresponding to starting the middle position alloy storehouse shakes, with stocked up from the middle position alloy storehouse carburant to
Alloy scale hooper, weighed based on the alloy weighing bucket when dosage needed for previous tapping；
When tapping reaches predetermined tap to the molten steel amount in half ladle, added into half ladle when previous
The carburant of dosage needed for tapping.
Optionally, it is described when tapping reaches predetermined tap to the molten steel amount in half ladle, to half ladle
The carburant of dosage needed for previous tapping is worked as in interior addition, including：
When tapping reaches predetermined tap to the molten steel amount in half ladle, against the steel stream currently tapped start to
Carburant is added in half ladle, until adding when dosage needed for previous tapping.
Optionally, the predetermined tap is specially：Molten steel amount in half ladle reaches the half steel and contains product
1/3；
The carburant added into half ladle when dosage needed for previous tapping, including：
When tapping to the molten steel amount in half ladle reaches the half steel and contains the 1/3 of product, currently gone out by opposite
The charging chute of the steel stream of steel, with the direction with the steel stream centering currently tapped, added into half ladle and work as previous tapping
The carburant of required dosage.
Optionally, the addition of the carburant is 800-1200kg.
Optionally, it is 5-8 minutes to control the tapping time.
Optionally, the carburant is made up of each component of following mass percent：Fixed carbon >=89%, ash content≤8%,
Sulphur≤0.30%, Quan Shui≤0.5%, nitrogen≤0.40%.
Optionally, the granularity of the carburant is 3~8mm.
The one or more technical schemes provided in the embodiment of the present invention, have at least the following technical effects or advantages：
The carburant when dosage needed for previous tapping is added into half ladle, and in tapping to the steel in half ladle
Water adds when reaching predetermined tap, so as to make carburant stir into half steel using the impact of steel stream, improves carburant and steel
The reaction interface product of water, be advantageous to the reaction of carburant and molten steel, so as to adding the carbon content in half steel.Carburant feed postition
Simply, carburant fusing is rapid, it is not necessary to extra facilities and equipments.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, make required in being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are some embodiments of the present invention, for this
For the those of ordinary skill of field, on the premise of not paying creative work, it can also be obtained according to these accompanying drawings other
Accompanying drawing.
Fig. 1 is the schematic flow sheet of semisteel smelting method provided in an embodiment of the present invention.
Embodiment
The embodiment of the present invention solves technical problem in the prior art by providing a kind of semisteel smelting method.
With reference to shown in figure 1, a kind of semisteel smelting method provided in an embodiment of the present invention, comprise the following steps：
S101, by carburant, blanking bin is transported in middle position alloy storehouse by belt from steel mill.
In S101, before S102 is performed, by carburant from alloy storehouse with being transported to steel mill blanking bin, pass through belt
To be transported to middle position alloy storehouse stand-by for blanking bin from steel mill again.In embodiments of the present invention, carburant is transported by belt to arrive
In at least one middle position alloy storehouse.
Specifically, carburant used in the embodiment of the present invention it is conventional have Delanium, calcined petroleum coke, natural stone
Ink, coke, anthracite and the compound being made into this kind of material.Specifically, in the carburant various components quality percentage
Content is：Fixed carbon >=89%, ash content≤8%, sulphur≤0.30%, Quan Shui≤0.5%, nitrogen≤0.40%.
Specifically, the granularity of the carburant used in the embodiment of the present invention is 3~8mm, so as to which carburant has particle
It is small, accumulate big and surface with the reaction interface of molten steel and be not passivated.
Perform S102, the molten steel formed by semisteel smelting is tapped into half ladle.
Specifically, in S102, after semisteel smelting, the molten steel formed by semisteel smelting is tapped to positioned at turning
On ladle car under stove in half set ladle.
Perform S103, start middle position alloy storehouse corresponding to alloy electricity shake, with carburant of being stocked up from middle position alloy storehouse to conjunction
Golden scale hooper, weighed based on alloy weighing bucket when dosage needed for previous tapping.
In specific implementation process, it can weigh that carburant 800-1200kg is standby, 800-1200kg carburant and list
The molten steel of heat is flux matched, to improve phosphorus content 0.20~0.30%.
In specific implementation process, S103 can be performed before S102, or start simultaneously at execution with S102.
Then, perform S104, when tapping reaches predetermined tap to the molten steel amount in half ladle, added into half ladle
When the carburant of dosage needed for previous tapping.
Specifically, in S104, when tapping reaches predetermined tap to the molten steel amount in half ladle, against current tapping
Steel stream start to add carburant into half ladle, weighed in S103 work as dosage needed for previous tapping until adding.
Specifically, when reaching predetermined tap to the molten steel amount in half ladle in tapping, against the steel stream currently tapped
Start to add carburant 800-1200kg into half ladle.
It should be noted that in embodiments of the present invention, predetermined tap is preferably arranged to：Molten steel in half ladle
Amount reaches 1/3 that half steel contains product.
Then S104 is specially：At the time of molten steel amount in half ladle reaches the 1/3 of half steel containing product, slipped by charging
Groove adds the carburant when dosage needed for previous tapping into half ladle.
Start to add carburant into half ladle because molten steel amount reaches at the time of half steel contains the 1/3 of product, therefore, subsequently
Steel stream can form agitating function in 1/3 molten steel in half ladle so that the carburant being initially added into this moment is by uniform stirring
Enter in molten steel, so as to fuse into half steel beneficial to carburant and need not be by mixing plant.
In one embodiment, when adding carburant, by against the charging chute of steel stream currently tapped, with
The direction for the steel stream centering currently tapped, the carburant when dosage needed for previous tapping is added into half ladle, so as to ensure to increase
Carbon agent more fully mixes when fusing into molten steel.
In specific implementation process, it is 5-8 minutes to control the tapping time.
Before S102, semisteel smelting method provided in an embodiment of the present invention, also in the steel that will be formed by semisteel smelting
Before water is tapped into half ladle, 300~600kg of temperature raising agent is added in the decarbonizing furnace of smelting process, is smelted compared to reducing
During temperature raising agent usage amount, such as use heat up ferrosilicon as temperature raising agent, it is possible to reduce the usage amount 300 of temperature raising agent~
400kg。
Adding carburant can react into molten steel, half steel chemical heat is improved 15~25 DEG C, therefore can reduce de-
The usage amount of temperature raising agent in carbon stove.So the usage amount of temperature raising agent, steel-making can be reduced while the carbon content of half steel is improved
The consumption of process temperature raising agent is reduced, and corresponding lime consumption reduces, and realizes the reduction of steel technology, and reaching reduces production cost
Purpose.
Below, multiple instantiations of semisteel smelting method provided in an embodiment of the present invention are provided：
Example one：
Start to tap after having smelted half steel, at the time of tapping 2 minutes, the 1102kg carburants of weighing are added into half steel
Bao Zhong, charging process and the tapping of carburant are carried out simultaneously, and tapping terminates to use slide plate rear slag stopping, and tapping is time-consuming 6 minutes, tapping
Terminate.
Example two：
Start to tap after having smelted half steel, at the time of tapping 1 point and 35 seconds, the 1050kg carburants of weighing are added half
In ladle, the charging process of carburant and tapping are carried out simultaneously, and tapping terminates to use slide plate rear slag stopping, and tapping takes 5 points 45 seconds.
Example three：
Start to tap after having smelted half steel, at the time of tapping 1 point and 50 seconds, 1085kg carburants are added into half ladle
In, the charging process of carburant and tapping are carried out simultaneously, and tapping terminates to use slide plate rear slag stopping, and tapping takes 6 points 10 seconds.
By molten steel sample sampling detection in the molten steel sample obtained before tapping and half ladle, contrast composition situation of change is such as
Shown in table 1 below, table 2：
The component content (surplus Fe) for the molten steel sample that table 1. obtains before tapping
| Case | C | Si | Mn | P | S |
| 1 | 3.1883% | 0.0133% | 0.0491% | 0.0212% | 0.0045% |
| 2 | 3.2833% | 0.0171% | 0.0385% | 0.0221% | 0.0032% |
| 3 | 3.2457% | 0.0143% | 0.0470% | 0.0337% | 0.0038% |
The component content (weight/mass percentage composition %, surplus Fe) of molten steel sample in the ladle of table 2. half
| Case | C | Si | Mn | P | S |
| 1 | 3.4928% | 0.0129% | 0.0487% | 0.0231% | 0.0048% |
| 2 | 3.5687% | 0.0163% | 0.0392% | 0.0213% | 0.0037% |
| 3 | 3.5329% | 0.0151% | 0.0458% | 0.0326% | 0.0036% |
It should be noted that after the molten steel sample obtained before tapping is has smelted half steel, from the stove of the progress of falling stove before converter
Interior sampling, the component content in table 1,2 is weight/mass percentage composition.
It can be seen that and pass through from the contrast of table 1,2, in example 1, the phosphorus content of half steel improves 0.20~0.30%.
The one or more embodiments provided in the embodiment of the present invention, have at least the following technical effects or advantages：To half
The carburant when dosage needed for previous tapping is added in ladle, and reaches predetermined in tapping to the molten steel amount in half ladle
Added during tap, so as to make carburant stir into half steel using the impact of steel stream, improve the reaction interface of carburant and molten steel
Product, be advantageous to the reaction of carburant and molten steel, so as to adding the carbon content in half steel.Carburant feed postition is simple, carburant
Fusing is rapid, it is not necessary to extra facilities and equipments.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation
Property concept, then can make other change and modification to these embodiments.So appended claims be intended to be construed to include it is excellent
Select embodiment and fall into having altered and changing for the scope of the invention.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (7)
- A kind of 1. semisteel smelting method, it is characterised in that including：By carburant, blanking bin is transported in middle position alloy storehouse by belt from steel mill；The molten steel formed by semisteel smelting is tapped into half ladle；Alloy electricity corresponding to starting the middle position alloy storehouse shakes, with the carburant of being stocked up from the middle position alloy storehouse to alloy Scale hooper, weighed based on the alloy weighing bucket when dosage needed for previous tapping；When tapping reaches predetermined tap to the molten steel amount in half ladle, added into half ladle and work as previous tapping The carburant of required dosage.
- 2. semisteel smelting method as claimed in claim 1, it is characterised in that described in tapping to the molten steel in half ladle When amount reaches predetermined tap, the carburant when dosage needed for previous tapping is added into half ladle, including：When tapping reaches predetermined tap to the molten steel amount in half ladle, start against the steel stream currently tapped to described Carburant is added in half ladle, until adding when dosage needed for previous tapping.
- 3. semisteel smelting method as claimed in claim 2, it is characterised in that the predetermined tap is specially：The half steel Molten steel amount in bag reaches 1/3 that the half steel contains product；The carburant added into half ladle when dosage needed for previous tapping, including：When tapping to the molten steel amount in half ladle reaches the half steel and contains the 1/3 of product, by against currently tapping The charging chute of steel stream, with the direction with the steel stream centering currently tapped, added into half ladle when needed for previous tapping The carburant of dosage.
- 4. semisteel smelting method as claimed in claim 2, it is characterised in that the carburant addition is 800-1200kg.
- 5. the semisteel smelting method as described in any in claim 1-4, it is characterised in that it is 5-8 minutes to control the tapping time.
- 6. the semisteel smelting method as described in any in claim 1-4, it is characterised in that the carburant is by following quality hundred Divide each component composition of ratio：Fixed carbon >=89%, ash content≤8%, sulphur≤0.30%, Quan Shui≤0.5%, nitrogen≤0.40%.
- 7. the semisteel smelting method as described in any in claim 1-4, it is characterised in that the granularity of the carburant be 3~ 8mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710827692.0A CN107723577A (en) | 2017-09-14 | 2017-09-14 | Semisteel smelting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710827692.0A CN107723577A (en) | 2017-09-14 | 2017-09-14 | Semisteel smelting method |
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| Publication Number | Publication Date |
|---|---|
| CN107723577A true CN107723577A (en) | 2018-02-23 |
Family
ID=61206219
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710827692.0A Pending CN107723577A (en) | 2017-09-14 | 2017-09-14 | Semisteel smelting method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110453037A (en) * | 2019-09-09 | 2019-11-15 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for increasing heat source of semi-steel |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5456911A (en) * | 1977-10-17 | 1979-05-08 | Nippon Kokan Kk <Nkk> | Steel making method using as essential raw material reduced iron and reduced iron briquette used therefor |
| CN102925616A (en) * | 2011-08-08 | 2013-02-13 | 攀钢集团有限公司 | Smelting method of vanadium-containing molten iron |
| CN104988272A (en) * | 2015-08-07 | 2015-10-21 | 攀钢集团攀枝花钢铁研究院有限公司 | Output steel deoxidizing process under semisteel catching carbon practice condition |
-
2017
- 2017-09-14 CN CN201710827692.0A patent/CN107723577A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5456911A (en) * | 1977-10-17 | 1979-05-08 | Nippon Kokan Kk <Nkk> | Steel making method using as essential raw material reduced iron and reduced iron briquette used therefor |
| CN102925616A (en) * | 2011-08-08 | 2013-02-13 | 攀钢集团有限公司 | Smelting method of vanadium-containing molten iron |
| CN104988272A (en) * | 2015-08-07 | 2015-10-21 | 攀钢集团攀枝花钢铁研究院有限公司 | Output steel deoxidizing process under semisteel catching carbon practice condition |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110453037A (en) * | 2019-09-09 | 2019-11-15 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for increasing heat source of semi-steel |
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Application publication date: 20180223 |