CN103060511A - Oxygen supply method for preventing dedusting explosion venting of semisteel steel converter and semisteel smelting method - Google Patents
Oxygen supply method for preventing dedusting explosion venting of semisteel steel converter and semisteel smelting method Download PDFInfo
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- CN103060511A CN103060511A CN2013100119374A CN201310011937A CN103060511A CN 103060511 A CN103060511 A CN 103060511A CN 2013100119374 A CN2013100119374 A CN 2013100119374A CN 201310011937 A CN201310011937 A CN 201310011937A CN 103060511 A CN103060511 A CN 103060511A
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- oxygen supply
- oxygen
- semisteel
- steel
- converter
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Abstract
The invention discloses an oxygen supply method for preventing dedusting explosion venting of a semisteel steel converter and a semisteel smelting method. The oxygen supply method comprises three stages: first stage: during blowing for 90seconds by the converter, controlling the oxygen supply strength to 1.5-2.0 m<3>/(min.t steel); second stage: during blowing for 90-150s by the converter, controlling the oxygen supply strength to 2.5-3.0 m<3>/(min.t steel); and third stage: during blowing for 150 seconds by the converter, controlling the oxygen supply strength to 3.5-4.0 m<3>/(min.t steel). The semisteel smelting method adopts the oxygen supply method as an oxygen supply system in a semisteel smelting process. According to the invention, the dry method dedusting explosion venting time of the semisteel converter can be effectively controlled, and the oxygen supply strength is not repeatedly adjusted manually in the smelting operation, so that the semisteel smelting method has the advantages of simpleness in operation, easiness in implementation and the like.
Description
Technical field
The present invention relates to semi-steel making converter dry dedusting technology field, more particularly, relate to a kind of method for supplying oxygen that can prevent the dry-dedusting system venting of dust explosion of semi-steel making converter, and a kind of semisteel smelting method that adopts this method for supplying oxygen.
Background technology
In the prior art, mainly adopt dry-dedusting system that the flue gas that the half steel steel-making converter produces is purified and reclaims.The converter dry dust-removal system mainly comprises: gasification cooling flue, evaporative cooler (EC), electrostatic precipitator (EP), coal gas switching station, gas cooler (GC), diffusion system, ash-transmission system etc.CO, H in the fly-ash separator electric field
2, O
2Just may cause blast when reaching certain value Deng gas content; therefore; electrostatic precipitator all is equipped with explosion venting device; play the effect of safeguard protection; in case blast in the fly-ash separator; explosion venting device can automatically be opened gas with burning expansion and in time discharge and can automatically reset; reduced the destructiveness to electrostatic precipitator; thereby guaranteed the electrostatic precipitator long-time running; but each venting of dust explosion also can be to the equipment injury; therefore, how to prevent that venting of dust explosion from becoming the important factor that prolongs the dry-dedusting system life-span.
In existing patent documentation, publication number is that the Chinese patent application of CN102010928A has openly disclosed a kind of converter oxygen gun blowing control method based on dry dedusting technology, the method realizes adjusting to the smelting process oxygen flow by the aperture of adjusting oxygen rifle oxygen regulating valve door, to reach oxygen and CO content in the control flue gas and then to prevent the purpose of venting of dust explosion.The method needs continuous control valve opening, complex operation, and not mentioned oxygen supply intensity.
Publication number is the method that the Chinese patent application of CN101619375A has openly disclosed a kind of preventing electric precipitation detonation discharge of top and bottom blown converter, the method is taken first the flue gas that shove charge produces away, normally blow again, and by CO and O in silicone content, oxygen gun blowing flow and the flue gas analyzing apparatus in the control molten iron
2Ratio reach the purpose that prevents venting of dust explosion.Yet, this patent documentation is for molten iron-steelmaking, common molten iron-steelmaking is owing to contain the heating elements such as silicon, manganese, the blowing initial stage mainly is the reaction of silicon, manganese and oxygen, the CO gas volume that produces is less, and in the semi-steel making process, because carbonaceous amount percentage composition is (3.4%～4.0%) in the half steel that obtains after the desulfurization vanadium extraction, silicon in the half steel, manganese heating element content are extremely low, therefore the converter smelting initial stage is mainly carbon and oxygen reaction, namely can produce a large amount of CO gas at the smelting initial stage, so the easier dry method dust venting of dust explosion that causes of semi-steel making; In addition, silicone content is difficult to control in the molten iron, and there is the hysteresis phenomenon of certain hour in oxygen analyser, very difficult accurately judgement CO and O
2Ratio, therefore, the method realizes that difficulty is larger.
Summary of the invention
For at least one in the prior art above shortcomings, one of purpose of the present invention is to provide a kind of method for supplying oxygen that can prevent semi-steel making converter dust-removing venting of dust explosion, this method for supplying oxygen is by adjusting the oxygen supply intensity of steel-making converter, the probability of converter dry dedusting venting of dust explosion during with the reduction semi-steel making.Another object of the present invention is to provide a kind of semisteel smelting method that adopts this method for supplying oxygen.
An aspect of of the present present invention provides a kind of method for supplying oxygen that prevents semi-steel making converter dust-removing venting of dust explosion, and described method for supplying oxygen comprises following three phases: the fs: bessemerize when beginning to 90s, the control oxygen supply intensity is 1.5～2.0m
3/ (mint
Steel); Subordinate phase: when bessemerizing 90～150s, the control oxygen supply intensity is 2.5～3.0m
3/ (mint
Steel); Phase III: bessemerize after the 150s, the control oxygen supply intensity is 3.5～4.0m
3/ (mint
Steel).
According to an embodiment who prevents the method for supplying oxygen of semi-steel making converter dust-removing venting of dust explosion of the present invention, when after carrying the oxygen rifle in the process of bessemerizing, again descending the oxygen rifle, repeat three oxygen supply stages as claimed in claim 1.
According to an embodiment who prevents the method for supplying oxygen of semi-steel making converter dust-removing venting of dust explosion of the present invention, the three phases of described method for supplying oxygen is set to automatic control mode.
Another aspect of the present invention provides a kind of semisteel smelting method, and described semisteel smelting method adopts aforesaid method for supplying oxygen as the oxygen supply system in the semisteel smelting process.
Compared with prior art, beneficial effect of the present invention comprises: can effectively control the number of times of semi-steel making converter dry dust-removal system venting of dust explosion, and need not manually regulate back and forth oxygen supply intensity during smelting operation, have simple to operately, be easy to the advantages such as realization.
Embodiment
Hereinafter, describe method for supplying oxygen and the semisteel smelting method that prevents semi-steel making converter dust-removing venting of dust explosion according to of the present invention in detail in connection with exemplary embodiment.
In one exemplary embodiment of the present invention, the method for supplying oxygen that prevents semi-steel making converter dust-removing venting of dust explosion adopts " three steps " oxygen supply mode, be about to the whole oxygen supply process of converter and be divided into three phases, described three phases can be set to three kinds of automatic control modes in converter smelting oxygen supply pattern: open the blowing mould formula, open and blow the 90s pattern and normally smelt pattern.Specifically:
The blowing mould formula is opened in the fs employing, that is, bessemerize when beginning to 90s, and the control oxygen supply intensity is 1.5～2.0m
3/ (mint
Steel).This be because, oxygen opens when blowing in the stove that reaction between carbon and oxygen is inviolent, the amount of oxygen of consumption is less, adopts this moment low oxygen supply intensity can reduce that unreacted oxygen level makes it not reach the venting of dust explosion scope in the stove.
Subordinate phase adopts to open blows the 90s pattern, and when namely bessemerizing 90～150s, the control oxygen supply intensity is 2.5～3.0m
3/ (mint
Steel).This be because, oxygen opens that to blow between 90～150s reaction between carbon and oxygen comparatively violent, the oxygen depletion amount increases, and at this moment, will improve oxygen supply intensity to 2.5～3.0m
3/ (mint
Steel) mainly contain following two purposes: the one, for comparatively sufficient oxygen level is provided, burn the metal loss that iron heats up and causes to reduce; The 2nd, in order to reduce the increase gradient of oxygen supply intensity, as skip this stage and directly enter the phase III, namely oxygen supply intensity is directly from 1.5～2.0m
3/ (mint
Steel) bring up to 3.5～4.0m
3/ (mint
Steel), span is excessive, causes easily oxygen content sharply to rise, and causes venting of dust explosion, in addition, also very easily makes slag getting dry, and the jet that increases suddenly also may cause the petticoat pipe slagging scorification.
Phase III is normal smelting pattern, namely bessemerizes after the 150s, and the control oxygen supply intensity is 3.5～4.0m
3/ (mint
Steel).Open blow 150s after the semi-steel making reaction between carbon and oxygen quite violent, this moment, the oxygen depletion amount was huge, adopted 3.5～4.0m
3/ (mint
Steel) high oxygen supply intensity mainly be for sufficient oxygen is provided to the molten bath, to guarantee the metallurgical effect of converter smelting.
When after needing to carry the oxygen rifle in the process of bessemerizing, again descending the oxygen rifle (for example, descend again rifle because of deslagging after need to carrying rifle midway), blow processing according to opening for the second time, namely repeat above-mentioned three phases (open the blowing mould formula, open and blow the 90s pattern and normally smelt pattern), until smelting endpoint.
In another exemplary embodiment of the present invention, the semisteel smelting method adopts aforesaid method for supplying oxygen as the oxygen supply system in the semisteel smelting process.
In order to understand better above-mentioned exemplary embodiment of the present invention, below in conjunction with concrete example it is further specified.
Example 1
Certain company's semi-steel making adopts dry-dedusting system, affects converter production for preventing the dedusting venting of dust explosion, and converter smelting oxygen supply pattern is divided into three phases, the fs: bessemerize when beginning to 90s, the control oxygen supply intensity is 1.5m
3/ (mint
Steel); Subordinate phase: when bessemerizing 90～150s, the control oxygen supply intensity is 2.5m
3/ (mint
Steel); Phase III: bessemerize after the 150s, the control oxygen supply intensity is 3.5m
3/ (mint
Steel), until blow end point.After adopting the method for supplying oxygen of this example, need not manually regulate back and forth oxygen supply intensity during smelting operation, dry method dust venting of dust explosion number of times is 3 times/years.
Example 2
Certain company's semi-steel making adopts dry-dedusting system, affects converter production for preventing the dedusting venting of dust explosion, and converter smelting oxygen supply pattern is divided into three phases, the fs: bessemerize when beginning to 90s, the control oxygen supply intensity is 2.0m
3/ (mint
Steel); Subordinate phase: when bessemerizing 90～150s, the control oxygen supply intensity is 3.0m
3/ (mint
Steel); Phase III: bessemerize after the 150s, the control oxygen supply intensity is 4.0m
3/ (mint
Steel), until blow end point.After adopting the method for supplying oxygen of this example, need not manually regulate back and forth oxygen supply intensity during smelting operation, dry method dust venting of dust explosion number of times is 3 times/years.
In sum, method of the present invention can be controlled to be 3 times/years with semi-steel making converter dry dust-removal system venting of dust explosion number of times effectively, and need not manually regulate back and forth oxygen supply intensity during smelting operation, has simple to operately, is easy to the advantages such as realization.
Although the above by having described the present invention in conjunction with exemplary embodiment, it will be apparent to those skilled in the art that in the situation that does not break away from the spirit and scope that claim limits, can carry out various modifications and change to exemplary embodiment of the present invention.
Claims (4)
1. a method for supplying oxygen that prevents semi-steel making converter dust-removing venting of dust explosion is characterized in that, described method for supplying oxygen comprises following three phases:
Fs: bessemerize when beginning to 90s, the control oxygen supply intensity is 1.5～2.0m
3/ (mint
Steel);
Subordinate phase: when bessemerizing 90～150s, the control oxygen supply intensity is 2.5～3.0m
3/ (mint
Steel);
Phase III: bessemerize after the 150s, the control oxygen supply intensity is 3.5～4.0m
3/ (mint
Steel).
2. the method for supplying oxygen that prevents semi-steel making converter dust-removing venting of dust explosion according to claim 1 is characterized in that, when again descending the oxygen rifle after carrying the oxygen rifle in the process of bessemerizing, repeats three oxygen supply stages as claimed in claim 1.
3. the method for supplying oxygen that prevents semi-steel making converter dust-removing venting of dust explosion according to claim 1 is characterized in that, the three phases of described method for supplying oxygen is set to automatic control mode.
4. a semisteel smelting method is characterized in that, said semisteel smelting method adopts such as the described method for supplying oxygen of any one in the claims 1 to 3 as the oxygen supply system in the semisteel smelting process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310011937.4A CN103060511B (en) | 2013-01-14 | 2013-01-14 | Oxygen supply method for preventing dedusting explosion venting of semisteel steel converter and semisteel smelting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310011937.4A CN103060511B (en) | 2013-01-14 | 2013-01-14 | Oxygen supply method for preventing dedusting explosion venting of semisteel steel converter and semisteel smelting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103060511A true CN103060511A (en) | 2013-04-24 |
| CN103060511B CN103060511B (en) | 2014-07-09 |
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|---|---|---|---|
| CN201310011937.4A Expired - Fee Related CN103060511B (en) | 2013-01-14 | 2013-01-14 | Oxygen supply method for preventing dedusting explosion venting of semisteel steel converter and semisteel smelting method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103320566A (en) * | 2013-06-26 | 2013-09-25 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for smelting semi-steel through double-slag process |
| CN103498017A (en) * | 2013-09-23 | 2014-01-08 | 攀钢集团西昌钢钒有限公司 | Semi-steel converter steelmaking method |
| CN104032064A (en) * | 2014-06-25 | 2014-09-10 | 攀钢集团西昌钢钒有限公司 | Steel-making method |
| CN104831015A (en) * | 2015-04-21 | 2015-08-12 | 河北钢铁股份有限公司承德分公司 | Method for avoiding explosion venting of electrostatic dust collector in iron mixing process of converter |
| CN106544465A (en) * | 2015-09-17 | 2017-03-29 | 鞍钢股份有限公司 | A kind of control method for preventing converter dry dedusting early stage venting of dust explosion |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103320566A (en) * | 2013-06-26 | 2013-09-25 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for smelting semi-steel through double-slag process |
| CN103320566B (en) * | 2013-06-26 | 2015-09-09 | 攀钢集团攀枝花钢铁研究院有限公司 | Double slag process smelts the method for half steel |
| CN103498017A (en) * | 2013-09-23 | 2014-01-08 | 攀钢集团西昌钢钒有限公司 | Semi-steel converter steelmaking method |
| CN103498017B (en) * | 2013-09-23 | 2015-11-18 | 攀钢集团西昌钢钒有限公司 | Semisteel converter steelmaking method |
| CN104032064A (en) * | 2014-06-25 | 2014-09-10 | 攀钢集团西昌钢钒有限公司 | Steel-making method |
| CN104032064B (en) * | 2014-06-25 | 2016-02-03 | 攀钢集团西昌钢钒有限公司 | A kind of method for making steel |
| CN104831015A (en) * | 2015-04-21 | 2015-08-12 | 河北钢铁股份有限公司承德分公司 | Method for avoiding explosion venting of electrostatic dust collector in iron mixing process of converter |
| CN104831015B (en) * | 2015-04-21 | 2016-09-07 | 河北钢铁股份有限公司承德分公司 | A kind of method avoiding electrostatic precipitator venting of dust explosion during converter iron making |
| CN106544465A (en) * | 2015-09-17 | 2017-03-29 | 鞍钢股份有限公司 | A kind of control method for preventing converter dry dedusting early stage venting of dust explosion |
| CN106544465B (en) * | 2015-09-17 | 2018-08-03 | 鞍钢股份有限公司 | A kind of control method preventing converter dry dedusting venting of dust explosion early period |
Also Published As
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| CN103060511B (en) | 2014-07-09 |
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| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: PANGANG GROUP XICHANG STEEL + VANADIUM CO., LTD. Effective date: 20140130 |
|
| TA01 | Transfer of patent application right |
Effective date of registration: 20140130 Address after: 617000 Taoyuan street, Panzhihua, Sichuan, No. 90 Applicant after: Pangang Group Panzhihua Iron & Steel Research Institute Co., Ltd. Applicant after: Pangang Group Xichang Steel & Vanadium Co., Ltd. Address before: 617000 Taoyuan street, Panzhihua, Sichuan, No. 90 Applicant before: Pangang Group Panzhihua Iron & Steel Research Institute Co., Ltd. |
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