CN102925630A - Method for preventing water vapour in vacuum hopper and feeding elephant trunk of RH furnace - Google Patents
Method for preventing water vapour in vacuum hopper and feeding elephant trunk of RH furnace Download PDFInfo
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- CN102925630A CN102925630A CN2012104151251A CN201210415125A CN102925630A CN 102925630 A CN102925630 A CN 102925630A CN 2012104151251 A CN2012104151251 A CN 2012104151251A CN 201210415125 A CN201210415125 A CN 201210415125A CN 102925630 A CN102925630 A CN 102925630A
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- emission
- vacuum hopper
- baiting chute
- vacuum
- water vapour
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Abstract
The invention discloses a method for preventing water vapour in a vacuum hopper and a feeding elephant trunk of an RH furnace. The method is that a blowing pipe is arranged between a feeding opening of the vacuum hopper and the feeding elephant trunk, and during the non-working period of the RH furnace, nitrogen, compressed air or argon is blown into the feeding elephant trunk. The method is easy to realize, is simple and quick, nearly does not have noise and is low in cost, high-temperature exhaust gases can be effectively prevented from ascending to be accumulated and condensed into water vapour, and equipment is prevented from being damaged by splashing molten steel during the molten steel treatment due to damp added alloy which is caused by the condensed water vapour, so that the operation serviceability rate of the process equipment is improved, the economic production can be smoothly carried out, and the operability of the station equipment is increased.
Description
Technical field
The invention belongs to molten steel RH stove Refining Technology field, more particularly, relate to a kind of RH stove vacuum hopper and emission of baiting chute anti-steam method.
Background technology
RH refining full name is RH vacuum circulation degassing purifying method, the RH stove is a kind of steel secondary refining tooling for the production of the high-quality steel, whole molten steel metallurgical reaction is to carry out in block has the vacuum tank of refractory lining, the bottom of vacuum tank be two with the soaking tub of refractory lining, hot-bending pipe is equipped with on top, pumped gas by hot-bending pipe through gas cooler outside vacuum pump system is discharged to factory building.
The RH stove comprises the vacuum hopper system, and the vacuum hopper system is used for adding required alloying element material to purpose that molten steel is realized alloying under the vacuum during the vacuum-treat.Usually, the vacuum hopper system comprises iron alloy vacuum hopper, iron alloy oscillating feeder, AI/C vacuum hopper, AI/C oscillating feeder, emission of baiting chute, the first-class part of telescoping connection.Wherein, iron alloy vacuum hopper oscillating feeder links to each other with the feed bin bottom, be installed in the box-type container that (or the material machine that shakes is the tubing feeder form, it is installed on the vacuum hopper below and links with soft connecting mode with it), AL/C vacuum hopper oscillating feeder is installed in the box-type container below the AI/C vacuum hopper separately, is exclusively used in the iron alloy batch of material is rendered in the molten steel in the vacuum tank.
At present, both at home and abroad need to use top rifle gas injection, oxygen in the vacuum tank during the online RH stove inoperative that uses, coal gas, oxygen mix burning toast intensifications, change slag and remove knurl the anti-material of vacuum tank.The below of vacuum hopper system emission of baiting chute is provided with expansion joint and heat insulation joint, excessive with hot gas flow in realization and vacuum tank sharp separation and the isolation channel, prevent from simultaneously altering along emission of baiting chute and damaging vacuum hopper system sealing and relevant device in gas injection in vacuum tank, the oxygen mix burning high temperature hot gas that anti-material baking heats up to vacuum tank, the change slag produces when removing knurl.Its built-in drop in leaf of the heat insulation joint that the below of vacuum hopper system emission of baiting chute is provided with, there is the gap about about 20mm between turnover panel and heat insulation joint inwall, heats up, change slag in the vacuum tank baking of processing gap and will alter to vacuum hopper along emission of baiting chute by the gap between the turnover panel in the heat insulation joint and heat insulation joint inwall except the high temperature hot gas of knurl process generation.The used coal gas of RH furnace roof rifle is coke-oven gas, and its major ingredient is: hydrogen, methane and a small amount of carbon monoxide, C
2Above unsaturated hydrocarbons, carbonic acid gas, oxygen, nitrogen etc.Therefore, the waste gas main component that produces after oxygen, the coal gas mixed firing is H
2O, in autumn and winter season or the lower situation of temperature, steam is condensed into water along the high temperature hot gas of altering and being gathered on the vacuum hopper emission of baiting chute in the vacuum hopper because of the outer cold service that struggled against in hopper, and enter in the vacuum tank along emission of baiting chute trickling, so, when the RH stove is processed in the molten steel process molten steel in the vacuum tank and is added alloy material, alloy material is met the water of condensation in vacuum hopper and the emission of baiting chute and is made moist, enter in the vacuum tank when meeting high-temperature molten steel along emission of baiting chute, because of normal temperature steam be heated the vaporization volume sharply expand, to cause molten steel generation vigorous splash during in the vacuum tank this moment, the splash molten steel will stick to the anti-material of vacuum tank inwall or top surface, and the high-temperature molten steel of splash may splash to the vacuum tank top, will be for the high temperature camera damage of molten steel loop condition in the observation of vacuum groove or the top rifle rifle head scaling loss that vacuum tank inner top standby position is stopped, cause the top rifle normally not come into operation, the operation organization of production produces fluctuation before and after causing, and direct motion causes greater impact to economic production.RH furnace roof rifle is changed and is processed length consuming time as damage top rifle rifle head because of molten steel splash in the treating processes, and it is time-consuming many again to resume production, and fault handling is impacted larger to the production direct motion, at present temporarily without a kind of comparatively special cost-effective Technical Solving.
Summary of the invention
For the deficiencies in the prior art, one of purpose of the present invention is to solve the one or more problems that exist in the above-mentioned prior art.
The object of the present invention is to provide a kind of can so that RH stove vacuum hopper and emission of baiting chute without steam gather, condensation and eliminate the dysgenic method of condensing water vapor.
To achieve these goals, the invention provides a kind of RH stove vacuum hopper and emission of baiting chute anti-steam method, described method is by arranging a gas blow pipe between the feed opening of vacuum hopper and emission of baiting chute, during the inoperative of RH stove, in emission of baiting chute, purge nitrogen, pressurized air or argon gas.
According to an embodiment of RH stove vacuum hopper of the present invention and emission of baiting chute anti-steam method, the pressure of described nitrogen, pressurized air or argon gas is 0.3～0.5MPa.
An embodiment according to RH stove vacuum hopper of the present invention and emission of baiting chute anti-steam method preferably, purges nitrogen in emission of baiting chute.
An embodiment according to RH stove vacuum hopper of the present invention and emission of baiting chute anti-steam method is provided with control valve on the described gas blow pipe.
Easily realization of the present invention, simple and fast, basic noiselessness and expense are cheap, can effectively prevent from altering on the high-temp waste gas gathering, be condensed into steam, stopping so locate condensing water vapor causes and adds that alloy material makes moist and molten steel splash damage equipment when causing steel treatment, improve processing apparatus operation serviceability rate, promote the economic production direct motion, improved the post equipment operation rate.
Description of drawings
By the description of carrying out below in conjunction with the accompanying drawing that an example exemplarily is shown, above and other purpose of the present invention and characteristics will become apparent, wherein:
Fig. 1 is the processing structural representation of RH stove vacuum hopper of the present invention and emission of baiting chute anti-steam method.
Description of reference numerals:
10-vacuum hopper, 11-feed opening, 20-emission of baiting chute, 30-gas blow pipe, 31-control valve, 40 vacuum tanks.
Embodiment
Hereinafter, in connection with accompanying drawing RH stove vacuum hopper of the present invention and emission of baiting chute anti-steam method are described.
RH stove vacuum hopper and emission of baiting chute anti-steam method are by arranging a gas blow pipe 30 between the feed opening 11 of vacuum hopper 10 and emission of baiting chute 20 according to an exemplary embodiment of the present invention, during the inoperative of RH stove, to emission of baiting chute 20 interior purging nitrogen, pressurized air or argon gas.
According to the present invention, the pressure of the nitrogen of purging, pressurized air or argon gas is 0.3～0.5MPa.Generally speaking, sweeping gas in the industry can be selected as nitrogen, pressurized air, argon gas (never can select oxygen, because of easy under its high temperature and object or material generation oxidizing reaction, also never can select steam or coal gas), but mostly select pressurized air or nitrogen.The present invention preferably uses nitrogen to purge, and this is because it is rare gas element, and is difficult under the high temperature reacting with other object or material, and the while is water content not.If select pressurized air, easy water content in it, Yi Zaiwen is condensed into water when low; If select argon gas, though itself and nitrogen are all rare gas element, it is higher compared to the nitrogen cost.
According to the present invention, be provided with control valve 31 on the gas blow pipe 30, with pressure and the supply of control nitrogen, pressurized air or argon gas, described control valve 31 can comprise automatically controlled valve and/or manual valve, realizes the automatic control of nitrogen, pressurized air or argon gas and/or manually control.In addition, the latus rectum of gas blow pipe 30 can be DN20mm, but is not limited to this.
The present invention is increasing under the prerequisite of scalp very, and design uses nitrogen, pressurized air or argon gas to purge protection dexterously, effectively prevented from altering on the high temperature water content waste gas gather, condensation forms steam.Use a rifle bakingization slag during the RH stove inoperative, during intensification, the nitrogen that passes into, pressurized air or argon gas purge protection to emission of baiting chute under the mode of automatically control and/or manually control, prevent and eliminated on vacuum hopper and the emission of baiting chute position Yin Gaowen water-containing waste gas on the one hand and alter and gather at this section position, the alloy material that adds molten steel when being condensed into the steel treatment that steam causes makes moist and causes the existing larger potential safety hazard of molten steel splash damage equipment (during steel treatment, alloy material is met steam and is made moist, the adding high-temperature molten steel causes moment to produce a large amount of steam when interior and forming energy gathers, the slag splash phenomena occurs, easily cause the slag that splashes to burn out the accidents such as equipment); On the other hand, utilize nitrogen, pressurized air or argon gas to purge, the RH stove is processed station without any detrimentally affect, eliminated all detrimentally affects that exist before improving, reduce and eliminated potential safety hazard, realized safe and harmless, the economic purpose of using.
In sum, the present invention purges nitrogen, pressurized air or argon gas in emission of baiting chute during the inoperative of RH stove, alter on the high temperature water-containing waste gas that has produced when having stopped the rifle coal oxygen mixed firing of RH top and in vacuum hopper and emission of baiting chute inner accumulated, be condensed into steam, and then eliminated the alloy that adds in the molten steel and made moist and cause the molten steel splash because meeting steam, method is simple and the RH stove processed station without any detrimentally affect, the all detrimentally affects that exist before improving have been eliminated, reduce and eliminated potential safety hazard, realized safe and harmless, the economic purpose of using.
Although the above has described the present invention in conjunction with exemplary embodiment, those of ordinary skills should be clear, in the situation of the spirit and scope that do not break away from claim, can carry out various modifications to above-described embodiment.
Claims (4)
1. a RH stove vacuum hopper and emission of baiting chute anti-steam method, it is characterized in that, described method during the inoperative of RH stove, purges nitrogen, pressurized air or argon gas by between the feed opening of vacuum hopper and emission of baiting chute a gas blow pipe being set in emission of baiting chute.
2. RH stove vacuum hopper according to claim 1 and emission of baiting chute anti-steam method is characterized in that, the pressure of described nitrogen, pressurized air or argon gas is 0.3～0.5MPa.
3. RH stove vacuum hopper according to claim 1 and 2 and emission of baiting chute anti-steam method is characterized in that, preferably, purge nitrogen in emission of baiting chute.
4. RH stove vacuum hopper according to claim 1 and emission of baiting chute anti-steam method is characterized in that, are provided with control valve on the described gas blow pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210415125.1A CN102925630B (en) | 2012-10-26 | 2012-10-26 | Method for preventing water vapour in vacuum hopper and feeding elephant trunk of RH furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210415125.1A CN102925630B (en) | 2012-10-26 | 2012-10-26 | Method for preventing water vapour in vacuum hopper and feeding elephant trunk of RH furnace |
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| CN102925630A true CN102925630A (en) | 2013-02-13 |
| CN102925630B CN102925630B (en) | 2014-07-02 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105821179A (en) * | 2015-01-07 | 2016-08-03 | 宝山钢铁股份有限公司 | Sealed equipment of refining RH alloy for removing residual gas and application thereof |
| CN109095185A (en) * | 2018-08-31 | 2018-12-28 | 湖北天宜机械股份有限公司 | A kind of elevated-temperature seal device for discharging and method |
| CN111410062A (en) * | 2019-12-28 | 2020-07-14 | 攀钢集团西昌钢钒有限公司 | Vacuum circulation degassing furnace and feeding device thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003254675A (en) * | 2002-03-05 | 2003-09-10 | Nippon Steel Corp | Method for cleaning inside of pressure reduction facility and selector valve |
| CN101126732A (en) * | 2007-08-10 | 2008-02-20 | 南京埃森环境技术有限公司 | High temperature flue gas moisture instrument anti-abrasive anti-plugging method and device |
| CN201089782Y (en) * | 2007-09-07 | 2008-07-23 | 金川集团有限公司 | Chloridizing leaching kettle communicating tube with deroppilation device |
| CN201857415U (en) * | 2010-10-21 | 2011-06-08 | 攀钢集团钢铁钒钛股份有限公司 | Low-temperature chlorination system |
-
2012
- 2012-10-26 CN CN201210415125.1A patent/CN102925630B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003254675A (en) * | 2002-03-05 | 2003-09-10 | Nippon Steel Corp | Method for cleaning inside of pressure reduction facility and selector valve |
| CN101126732A (en) * | 2007-08-10 | 2008-02-20 | 南京埃森环境技术有限公司 | High temperature flue gas moisture instrument anti-abrasive anti-plugging method and device |
| CN201089782Y (en) * | 2007-09-07 | 2008-07-23 | 金川集团有限公司 | Chloridizing leaching kettle communicating tube with deroppilation device |
| CN201857415U (en) * | 2010-10-21 | 2011-06-08 | 攀钢集团钢铁钒钛股份有限公司 | Low-temperature chlorination system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105821179A (en) * | 2015-01-07 | 2016-08-03 | 宝山钢铁股份有限公司 | Sealed equipment of refining RH alloy for removing residual gas and application thereof |
| CN109095185A (en) * | 2018-08-31 | 2018-12-28 | 湖北天宜机械股份有限公司 | A kind of elevated-temperature seal device for discharging and method |
| CN109095185B (en) * | 2018-08-31 | 2023-05-09 | 湖北天宜机械股份有限公司 | High-temperature sealing unloading method |
| CN111410062A (en) * | 2019-12-28 | 2020-07-14 | 攀钢集团西昌钢钒有限公司 | Vacuum circulation degassing furnace and feeding device thereof |
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| Publication number | Publication date |
|---|---|
| CN102925630B (en) | 2014-07-02 |
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