CN1042239C - Method for improving pretreating effect of melten iron in iron mixing trolley - Google Patents
Method for improving pretreating effect of melten iron in iron mixing trolley Download PDFInfo
- Publication number
- CN1042239C CN1042239C CN95116587A CN95116587A CN1042239C CN 1042239 C CN1042239 C CN 1042239C CN 95116587 A CN95116587 A CN 95116587A CN 95116587 A CN95116587 A CN 95116587A CN 1042239 C CN1042239 C CN 1042239C
- Authority
- CN
- China
- Prior art keywords
- molten iron
- inner lining
- mixer car
- iron
- metal mixer
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The present invention relates to a method for pretreating molten iron in a molten iron mixing trolley. The thickness of an annular inner lining an in the position below the molten iron liquid level of a molten iron scouring region below an intermediate molten iron receiving hole in a straight barrel region of the molten iron mixing trolley is thinned to an allowable limiting value of the residual thickness of the inner lining. In this way, when the same molten iron is added, the liquid level height of the molten iron can be lowered so as to provide a good reaction space for pretreatment operation and make a desulfurization reaction, a dephosphorization reaction and a desiliconization reaction fully carried out. Simultaneously, the requirements for the un-shortening of the service life of the molten iron mixing trolley and the capability of matching steel making devices can be satisfied.
Description
The present invention relates to a kind of method of improving the hot metal pretreatment effect, particularly by increasing the method that the metal mixer car volume improves the hot metal pretreatment effect.
Development along with steel-smelting technology, requirement to hot metal pretreatment is more and more higher, usually the hot metal pretreatment technology that adopts is to take off S, P, Si operation in metal mixer car at present, for example the clear 51-119317 of Japanese patent application discloses a kind of " desulfurizing iron method ", be in torpedo shape metal mixer car, iron melt desulfurizing agent to be jetted in molten iron, to carry out desulfurization, the winding-up position of sweetening agent is the below from following 0.3D, (D is the diameter of metal mixer car middle portion).Like this, because intensive stirs and the winding-up operation, liquid level to molten iron has strict restriction, and too high as liquid level, then splash is serious, need to reduce the add-on of pre-treatment pulvis, influence pretreating effect,, need to reduce the molten iron liquid level for guaranteeing that the capacity pretreating agent that adds has enough boilings, the space of splashing, the Intake Quantity of molten iron will be reduced like this, but the capacity requirement of supporting converter can not be satisfied.
The objective of the invention is to obtain a kind ofly increases metal mixer car volumetrical method for improving the hot metal pretreatment effect, can be when not reducing the molten iron Intake Quantity, liquid level decreases, and makes to carry out adding enough pre-treatment pulvis in the preprocessing process, improves pretreating effect.
For achieving the above object, the present invention is achieved in that
A kind ofly increasing metal mixer car volumetrical method for improving the hot metal pretreatment effect, is that the circular thickness of inner lining that is subjected to the molten iron of Tie Kou lower end to wash away the following position of molten iron liquid level in district in the middle of will the straight tube of metal mixer car district removing is thinned to through using generation stove labour rear inner lining residual thick in the tolerance limit value.
Described liner thinning area is a stepped appearance low between the senior middle school of two ends along the profile of metal mixer car longitudinal profile.
Below in conjunction with accompanying drawing the present invention is described in detail.
Fig. 1 is the principle schematic of the inventive method.
Fig. 2 is the comparison diagram of attenuate front and back liner profile and melting loss curve.
In order to prevent that torpedo hot metal mixer car from because of the liner attenuate major accident taking place, the present invention at first will basis The situation that molten iron washes away is determined the liner thinning area. Among Fig. 1, the vertical tube part in the torpedo hot metal mixer car can divide Be two parts: the mitigation that the centre is subjected to the molten iron of Tie Kou lower end to wash away district 1 and molten iron washes away the both sides, district District 2. When carrying out the molten iron preliminary treatment, molten iron rushes at the top fortune that molten iron washes away 1 backward both sides, district Moving, rather than directly wash away to the surface in both sides mitigation district, so the melting loss of inner lining surface is at iron It is more serious that water washes away district 1, and the district alleviates in mitigation, and at the molten iron recirculating zone of cone portion 3 molten iron Directly wash away inner lining surface, the cone portion dry slag is serious simultaneously, the melting loss aggravation, and cone portion is former simultaneously The liner that has is thinner, so the thinning area of liner should be at the ring-type position of relaxing the district, owing to reduce The molten iron level height only works below molten iron level, and therefore an attenuate molten iron level is with the bottom The liner a that divides gets final product, and is conducive to reduce the center of gravity of torpedo hot metal mixer car, the stability when improving operation.
Key of the present invention is, under certain service condition, the thickness of determining each position of liner according to melting loss curve and the melting loss speed of liner, each position liner reaches the residual thick limit synchronously after making attenuate, both guaranteed that liquid level can reduce owing to the liner attenuate in same capacity molten iron situation, can guarantee that again the attenuate rear inner lining guarantees safety in generation stove labour, determine that the thickness of attenuate rear inner lining can be differentiated by following formula:
S
V=S-CV=≥S
T, then can attenuate,
In the formula: SV-reach the thickness of inner lining (mm) of overhaul
The former thickness of inner lining of S-(mm)
C-metal mixer car overhaul furnace life (inferior)
V-liner melting loss speed (mm/ time)
S
T-residual thick the limit of liner (mm) that obtains according to the melting loss curve
So, the maximum ga(u)ge=S that can cut
V-S
T
Referring to Fig. 2,4 is the melting loss curve of the anti-material of liner, 5 is the profile of former liner tile, 6 (oblique line parts) are the profile of attenuate rear inner lining brick, as can be seen from Figure 2, liner tile profile behind the attenuate is along low stepped appearance between the senior middle school of metal mixer car longitudinal profile two ends, this be because thinning process consider with both sides not the transition of thinning area is connected, prevent that not the thinning area is fixing owing to losing, support influences its compactness.
Introduce embodiments of the invention below in conjunction with effect.
Present embodiment is for to carry out the liner reduction processing to 320 tons of metal mixer cars, and the structural parameter such as the table 1 of this metal mixer car show that the thickness that relaxes the district is 300mm, according to formula S
V=S-CV 〉=S
T, substitution numerical value, S
V=300-1100 * 0.14=146mm, S
T=90mm, S
V＞S
T, showing can attenuate, S
V-S
T=146-90=56mm, illustrate relax district's thickness of inner lining maximum can attenuate 56mm, and according to this maximum value, consider that thinning area is connected with the transition of thinning area not, obtains both sides height, the low thinning area appearance profile in centre.This metal mixer car behind the liner attenuate before molten iron Intake Quantity and the attenuate to showing such as table 2.As known from Table 2, the molten iron loading capacity is increased to 330 tons by 320 tons during new stove, and the molten iron Intake Quantity increases to 295 tons by 285 tons during actual the use, and the 285 tons of molten iron of packing into equally, its liquid level 120mm that can descend.
Compared with prior art, the present invention proposes unique locating in advance for improving the interior molten iron of torpedo hot metal mixer car Managing effect and increase the torpedo hot metal mixer car volume method, is by enlarging the reaction of preliminary treatment pulvis and molten iron The space makes the reaction of taking off S, P, Si can carry out getting technical scheme more fully, so namely protects Card is under the prerequisite that does not change torpedo hot metal mixer car tiling arrangement (not oil (gas) filling device investment), and is reliably most economical Realize the liner attenuate, to enlarge the charge weight of pretreated reaction compartment or raising molten iron, simultaneously Satisfy that torpedo hot metal mixer car does not reduce service life and the requirement of supporting steelmaking equipment capacity.
Table 1
| The torpedo hot metal mixer car specification | Use material | Overhaul furnace life (inferior) | Molten iron pretreatment desulfurizing is than (%) | Cone portion | Vertical tube part | |
| Molten iron washes away the district | Relax the district | |||||
| 320 tons | Al 2O 3- SiC-C | 1100 | 90～95 | V=0.18 S T=60 | V=0.5 S T=80 | V=0.14 S T=90 |
Table 2
| Molten iron useful load (ton) during new stove | Liner overhaul furnace life (inferior) | The actual molten iron charge weight (ton) that uses | Volumetric efficiency (K) | |
| Before the attenuate | 320 | 1100 | 285±10 | 0.89 |
| Behind the attenuate | 330 liquid levels are constant | 1100 | 295±10 | 0.92 |
Annotate: liner tile Al
2O
3-SiC-C matter, desulfurization is than 95%.
Claims (2)
1. one kind increases metal mixer car volumetrical method for improving the hot metal pretreatment effect, it is characterized in that: the circular thickness of inner lining that is subjected to the molten iron of Tie Kou lower end to wash away the following position of molten iron liquid level in district in the middle of the straight tube of metal mixer car district is removed is thinned to through using generation stove labour rear inner lining residual thick in the tolerance limit value.
2. method according to claim 1 is characterized in that: described liner thinning area is a stepped appearance low between the senior middle school of two ends along the profile of metal mixer car longitudinal profile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95116587A CN1042239C (en) | 1995-10-20 | 1995-10-20 | Method for improving pretreating effect of melten iron in iron mixing trolley |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95116587A CN1042239C (en) | 1995-10-20 | 1995-10-20 | Method for improving pretreating effect of melten iron in iron mixing trolley |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1127303A CN1127303A (en) | 1996-07-24 |
| CN1042239C true CN1042239C (en) | 1999-02-24 |
Family
ID=5080962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95116587A Expired - Fee Related CN1042239C (en) | 1995-10-20 | 1995-10-20 | Method for improving pretreating effect of melten iron in iron mixing trolley |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1042239C (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3661374A (en) * | 1968-10-07 | 1972-05-09 | Koninklijke Hoogovens En Staal | Car with a vessel for the conveying of hot substances, particularly molten pig iron |
-
1995
- 1995-10-20 CN CN95116587A patent/CN1042239C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3661374A (en) * | 1968-10-07 | 1972-05-09 | Koninklijke Hoogovens En Staal | Car with a vessel for the conveying of hot substances, particularly molten pig iron |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1127303A (en) | 1996-07-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101751151B1 (en) | Preliminary processing method for molten iron | |
| CN100510112C (en) | Short-flow super low carbon steel ultra-low sulphur smelting control method | |
| CN107190122B (en) | Dephosphorization device and dephosphorization method for refining rotary blowing | |
| JPH10152714A (en) | Method for refining molten iron | |
| CN101338349A (en) | Converter steelmaking process by top, bottom and side blowing | |
| CN1042239C (en) | Method for improving pretreating effect of melten iron in iron mixing trolley | |
| JPS59150009A (en) | Refining method of steel | |
| CN104711395A (en) | High-performance spray gun for molten iron injection pretreatment | |
| JP2015017323A (en) | Preliminary treatment method for molten iron | |
| CN104762434B (en) | A kind of production method of anti-hydrogen induced cracking steel | |
| JP3333339B2 (en) | Converter steelmaking method for recycling decarburized slag | |
| JPS63140021A (en) | Pretreatment of molten iron | |
| JP2808197B2 (en) | Vacuum refining of molten steel using large diameter immersion tube | |
| JP6416634B2 (en) | Desiliconization and desulfurization methods in hot metal ladle | |
| JP4172304B2 (en) | Method for refining molten metal | |
| CN206457515U (en) | Melt desulfurization Scroll-type agitator | |
| JPH09256020A (en) | Method for dehosphorize-refining of molten iron in converter type refining vessel. | |
| JP3242300B2 (en) | Slag forming suppression method in hot metal processing | |
| SU624932A1 (en) | Structural steel production method | |
| JPH1150121A (en) | Restraining of slag foaming | |
| JP2768209B2 (en) | Converter steelmaking plant | |
| JPH04131316A (en) | Method and device for vacuum degassing of extra-low-carbon steel | |
| JPH0488113A (en) | Method for refining molten steel | |
| JP3290794B2 (en) | Molten steel refining method under reduced pressure | |
| JPS6396210A (en) | Pre-deoxidizing method in converter interior |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |