CN1461812A - Method and device for pretreating metal iron using torpedo hot metal mixer car diversified composite jetting method - Google Patents
Method and device for pretreating metal iron using torpedo hot metal mixer car diversified composite jetting method Download PDFInfo
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- CN1461812A CN1461812A CN 02115910 CN02115910A CN1461812A CN 1461812 A CN1461812 A CN 1461812A CN 02115910 CN02115910 CN 02115910 CN 02115910 A CN02115910 A CN 02115910A CN 1461812 A CN1461812 A CN 1461812A
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
A method and apparatus for pretreating the molten iron in mixer by multi-directional blowing is disclosed. Said apparatus is composed of molten iron mixer, top, blowing gun, and blowing elements for other directions. Its advantages are short pretreating time and desulfurizing time, and less consumption of desulfurizing agent.
Description
Technical field
The present invention relates to metallurgical technology field, pretreated method of specifically a kind of metal iron using torpedo hot metal mixer car diversified composite jetting and device.
Background technology
Take place frequently in order to improve continuously cast bloom external defect and implosion, there are quality problems such as sulfide segregation and dendritic segregation in the steel billet, sulphur content in the steel should be controlled at below 0.01～0.02%, thereby can make continuous casting billet quality be improved significantly, so countries in the world are all carried out secondary desulfurization for the molten iron major part of using for continuous casting and are handled.Because the whole process of converter steelmaking is an oxidizing atmosphere, sweetening power is limited.Thereby for a long time desulfurizing iron has been carried out big quantity research and has obtained developing rapidly.
Blast-melted secondary desulfurization technology is to begin the thirties in 20th century to use, the sixties, oxygen top blown converter steel making technology was developed rapidly after emerging, become ripe at present at home and abroad, in actual production, widely apply, the treatment process method is of a great variety, successively about six classes of technology of invention are 16 kinds, and industrial production is mainly based on sulfur methods such as paddling process, blowing processes.
China just begins to handle high-sulphur molten iron with soda spreading method during the initial post-liberation period.Because China transforms converter steelmaking than later from open hearth, so external desulfurization of hot metal just grew up gradually to the latter stage seventies.Up to now, Chinese large-sized iron and steel enterprise and most of local key iron and steel enterprise have all set up the desulfurizing iron station, also have many factories to carry out commerical test research.
It is main with lime, calcium carbide mainly that China adopts iron melt desulfurizing agent now, brings into use the magnesium fimily desulfurizing agent recently.What domestic and international big-and-middle-sized Steel Plant extensively adopted at present is that winding-up lime in iron ladle, the metal mixer car, calcium carbide system and magnesium are doctor treatment.Sulfur method mainly contains following several method:
1, throw-in play it sweetening effectiveness is preferably arranged.This method sweetening effectiveness instability produce the smoke pollution environment, but it does not need specific installation, and is simple to operate.
2, molten iron container rotation stirring desulphurization method molten iron stirs and can enlarge the desulphurization reaction interface, the transmission course of accelerated reaction material, thus improved speed of response.It is divided into rotary drum method and shaking ladle process.Though their sweetening effectivenesss are better, because container rotates heaviness, the power consumption height, lining life is low, fails widely to use.
3, adopt the DO method of mechanical agitation desulfuration method employing " bifurcation " type hollow stirrer of agitator, it comprises the RS method of employing inverted T-shaped agitator and the KR method of criss-cross impeller agitator.
The KR paddling process, because stirring capacity is strong and the desulfurization front and back fully remove bits, so have the sorbent utilization height, the advantage that desulfuration efficiency is high can be taken off molten iron sulphur to＜0.002%.Shortcoming is the equipment more complicated, and the molten iron temperature loss is bigger.
4, blowing process is that carrier jets desulfurization powder to the molten iron deep with gas with spray gun, to stir molten iron and the well-mixed sulfur method of sweetening agent.The metal mixer car blowing process is divided into the TDS doctor treatment of oblique cutting winding-up and top spray.
In a word, it is fast that the blowing desulfurization method has desulphurization reaction speed, the efficient height, and flexible and convenient operation, it is big to handle iron water amount, advantages such as the simple less investment of equipment.Thereby it has become the main method of desulfurizing iron.
But there is weakness in metal mixer car blowing desulfurization method, because its reaction vessel irregular, exists the dead band of winding-up, has influence on the degree of uniformity of molten iron in the metal mixer car, causes sorbent utilization low, and consumption is big.Therefore must find out a kind of method, promote the stirring of molten iron in the reaction vessel, thereby maximize favourable factors and minimize unfavourable ones, give full play to the advantage of metal mixer car blowing desulfurization method.
Summary of the invention
It is short to the objective of the invention is to design a kind of desulfurization time, saves the metal iron using torpedo hot metal mixer car diversified composite jetting pretreatment process and the device of sweetening agent.
The pretreated method of metal iron using torpedo hot metal mixer car diversified composite jetting of the present invention comprises: from top-blown spray gun gas and sweetening agent are blown in the molten iron of metal mixer car, also have from the winding-up element of the sidepiece that is contained in metal mixer car to spray gas in molten iron; Perhaps from the winding-up element of the bottom that is contained in hybrid vehicle, spray gas; Perhaps from the winding-up element of the sidepiece that is contained in metal mixer car or bottom, spray gas, because the effect of gas, make molten iron in the metal mixer car and sweetening agent uniform mixing apace.
The blowing gas angle of the winding-up element of metal mixer car sidepiece is 0～30 °.
The blowing gas angle of the winding-up element of metal mixer car bottom is 0～60 °.
The pretreated device of metal iron using torpedo hot metal mixer car diversified composite jetting of the present invention comprises: metal mixer car, top-blown spray gun, be equipped with the winding-up element in the bottom of metal mixer car in addition; Or the winding-up element is housed at the metal mixer car sidepiece; Or the winding-up element is housed at bottom, the sidepiece of metal mixer car.
The winding-up element comprises: the permeable refractory brick of porous through-type or porous diffuse type or slit-type, and the refractory brick sidepiece is surrounded by steel plate, and the bottom has air chamber.
The advantage of pretreated method of metal iron using torpedo hot metal mixer car diversified composite jetting of the present invention and device is: because multi-faceted ground of metal mixer car blowing gas, make good circulation of the inner formation of molten iron, thereby shortened the treatment time of molten iron significantly, accelerated the carrying out of hot metal pretreatment reaction, make its sweetening agent treatment time on average descend 36.1%, total winding-up time reduces 43.3% at most, and sorbent consumption reduces 20%.
Description of drawings
Fig. 1 is the multi-faceted blowing gas structural representation of metal mixer car.
Fig. 2 is winding-up component structure synoptic diagram.
Fig. 3-Fig. 5 is winding-up element cross-section figure.
Embodiment
Embodiment one:
According to the bottom of metal mixer car shown in Figure 1 winding-up element 2 is housed, top-blown spray gun 3 is equipped with at the top of metal mixer car 1.
Embodiment two:
According to shown in Figure 1, the sidepiece of metal mixer car is equipped with winding-up element 2, and top-blown spray gun 3 is equipped with at the top of metal mixer car 1.
Embodiment three:
Shown in 1, the bottom of metal mixer car 1, sidepiece are equipped with winding-up element 2 with reference to the accompanying drawings, and top-blown spray gun 3 is equipped with at metal mixer car 1 top.
Embodiment four:
According to shown in Figure 1, top-blown spray gun 3 blows to gas and sweetening agent mixing in the molten iron of metal mixer car 1 on the metal mixer car 1, winding-up element 2 is blown into gas in the molten iron of metal mixer car, because the effect of gas makes molten iron in the metal mixer car 1 and sweetening agent fast, mix equably, accelerated desulfurization rate like this.Winding-up element 2 comprises permeable refractory brick 5, and the sidepiece of refractory brick 5 is surrounded by steel plate 4, and the bottom has air chamber.
Claims (5)
1, the pretreated method of a kind of metal iron using torpedo hot metal mixer car diversified composite jetting, comprise: from top-blown spray gun (3), gas and sweetening agent are blown in the molten iron of metal mixer car (1), it is characterized in that: also have from winding-up element (2) blowing gas to molten iron of the bottom that is contained in metal mixer car (1); Perhaps to molten iron, blow from the winding-up element (2) that is contained in metal mixer car (1) sidepiece; Perhaps to molten iron, blow, make molten iron in the metal mixer car (1) and sweetening agent uniform mixing promptly from the bottom that is contained in metal mixer car (1), the winding-up element (2) of sidepiece.
2, the pretreated method of metal iron using torpedo hot metal mixer car diversified composite jetting according to claim 1 is characterized in that: the angle of the blowing gas of sidepiece winding-up element is 0～30 °.
3, the pretreated method of metal iron using torpedo hot metal mixer car diversified composite jetting according to claim 1 is characterized in that: the angle of the blowing gas of bottom winding-up element is 0～60 °.
4, the pretreated device of a kind of metal iron using torpedo hot metal mixer car diversified composite jetting comprises: metal mixer car (1), top-blown spray gun (3) is characterized in that: also have in the sidepiece of metal mixer car (1) or bottom or sidepiece, bottom are equipped with winding-up element (2).
5, the pretreated device of metal iron using torpedo hot metal mixer car diversified composite jetting according to claim 1, it is characterized in that: winding-up element (2) comprising: porous through-type or porous diffuse type or slit-type permeable refractory brick (5), the side of refractory brick (5) is surrounded by steel plate (4), and the bottom has air chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02115910 CN1461812A (en) | 2002-05-31 | 2002-05-31 | Method and device for pretreating metal iron using torpedo hot metal mixer car diversified composite jetting method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02115910 CN1461812A (en) | 2002-05-31 | 2002-05-31 | Method and device for pretreating metal iron using torpedo hot metal mixer car diversified composite jetting method |
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| CN1461812A true CN1461812A (en) | 2003-12-17 |
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| CN 02115910 Pending CN1461812A (en) | 2002-05-31 | 2002-05-31 | Method and device for pretreating metal iron using torpedo hot metal mixer car diversified composite jetting method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102212638A (en) * | 2011-05-12 | 2011-10-12 | 刘东业 | Refining method of molten iron in ladle and devices required by same |
| CN103223473A (en) * | 2013-04-23 | 2013-07-31 | 山西太钢不锈钢股份有限公司 | Method for spraying covering agent into molten iron tank |
| CN103924025A (en) * | 2014-03-27 | 2014-07-16 | 东北大学 | Method for pre-desulfuration of combined-blowing molten iron at top and bottom in ladle |
-
2002
- 2002-05-31 CN CN 02115910 patent/CN1461812A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102212638A (en) * | 2011-05-12 | 2011-10-12 | 刘东业 | Refining method of molten iron in ladle and devices required by same |
| CN102212638B (en) * | 2011-05-12 | 2013-03-20 | 刘东业 | Refining method of molten iron in ladle and devices required by same |
| CN103223473A (en) * | 2013-04-23 | 2013-07-31 | 山西太钢不锈钢股份有限公司 | Method for spraying covering agent into molten iron tank |
| CN103924025A (en) * | 2014-03-27 | 2014-07-16 | 东北大学 | Method for pre-desulfuration of combined-blowing molten iron at top and bottom in ladle |
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