CN103100702A - Hot metal ladle baking method - Google Patents
Hot metal ladle baking method Download PDFInfo
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- CN103100702A CN103100702A CN2012105867502A CN201210586750A CN103100702A CN 103100702 A CN103100702 A CN 103100702A CN 2012105867502 A CN2012105867502 A CN 2012105867502A CN 201210586750 A CN201210586750 A CN 201210586750A CN 103100702 A CN103100702 A CN 103100702A
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- metal ladle
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Abstract
The invention relates to a hot metal ladle baking method which includes the following steps. Firstly, a vertically-structured baking device is used and an melted iron tank cover can be vertically rotated and tilted for closing and opening. Secondly, low-heating-value materials are led to a rotation connection mechanism upwards along a side of a rack, conveyed by a large arm to a combustor of a tank cover center and get combusted. A high-pressure fan provides auxiliary air. The auxiliary air enters from the other side of the rack and into the rotation connection mechanism, preheated by heaters on the circumference of the tank cover to be possessed with temperature which is more than 500 DEG C. Then the auxiliary air is conveyed into the combustor arranged at the tank cover center and mixed and burnt with the low-heating-value materials. With the hot metal ladle baking method, heat-storage type high temperature air combustion technology is applied to baking of a hot metal ladle, and at the same time, the low-heating-value materials are used to reduce heat loss in pouring melted iron, prolong the service life of a hot metal ladle, recover waste heat in smoke, achieve that combustion air can be combusted in high temperature but low oxygen conditions and reduce emission of pollutant gas. In addition, energy is saved, environment is protected and economic and social benefits are obvious.
Description
Technical field
The invention belongs to the metallurgical technology technical field, particularly a kind of baking method of ladle.
Background technology
The iron bag is the container of containing the storage molten iron, is again the part of smelting equipment.Molten iron after the iron bag of packing into transmission and casting cycle in to lose a large amount of heats, its thermal loss roughly is divided into three parts: first is the radiation heat loss of molten iron upper surface (iron bag mouth); Second portion is the comprehensive radiation loss on iron incrustation surface; Third part is the accumulation of heat loss of iron ladle-lining.Wherein lose as main take the accumulation of heat of iron ladle-lining.The method of taking to improve tapping temperature makes up that the temperature loss of molten iron is uneconomic during iron Bao Shengtie, exceedingly improve the ironmaking temperature and not only extended the ironmaking time, reduce iron output, raw material and power source consumption have been increased, shorten the time between overhauls(TBO) of smelting furnace, and easily cause the fluctuation of continuous casting production and the mass defect of strand.The purpose of iron bag baking is to improve equably the temperature levels of iron ladle-lining, with the heat loss that reduces molten steel pouring course and the service life that extends the iron ladle-lining.
Summary of the invention
The present invention provides a kind of baking method of ladle for solving the technical problem that exists in known technology, not only solve the iron bag and be difficult to the efficient evenly difficult problem of baking, and really realized saving energy and reduce the cost, reduced the heat loss of molten steel pouring course and the service life of prolongation iron ladle-lining.
The technical scheme that the present invention takes for the technical problem that exists in the solution known technology is:
A kind of baking method of ladle comprises the steps: 1) adopt the apparatus for baking of vertical structure, make the molten iron cover can vertically rotate the keying of fascinating; 2) low calorie fuels upwards causes connecting mechanism for rotating from the frame side, is delivered to through large arm the burner that is arranged on the cover center and burns; Combustion air is provided by high pressure positive blower, enter connecting mechanism for rotating from the opposite side of frame, and carry out preheating by the heat exchanger around cover, and combustion air temperature is preheated to more than 500 ℃, then be delivered in the burner that is arranged on the cover center and low calorie fuels mixing after-combustion.
Described molten iron cover can vertically rotate the keying of fascinating, to provide driving power by surface-based electrical hoist, by the traction of fixed pulley, running block fascinate crank, connecting mechanism for rotating, drive large arm and the cover that is connected on large arm fascinates, inclination maximum can reach 85 °.
Described low calorie fuels is coal gas of converter, blast furnace gas or the mixed gas of steel plant's recovery and other low heat value industrial combustion gas of recovery.
Advantage and good effect that the present invention has are: the present invention is applied to iron bag bake process with heat accumulating type high temperature air combustion technology, adopts simultaneously low calorie fuels, is conducive to iron bag homogeneous heating, reduces heat loss, has extended simultaneously the life-span of iron bag.The present invention has not only solved the iron bag and has been difficult to the efficient evenly difficult problem of baking, and really realized energy-saving and cost-reducing, reduce the heat loss of molten steel pouring course and the service life of prolongation iron ladle-lining, waste heat in recovered flue gas to greatest extent, realized the gas high-temperature low oxygen combustion, reduced the discharging of dusty gas, had energy-conservation and double action environmental protection, economic and social benefit is remarkable.
The specific embodiment
For further understanding summary of the invention of the present invention, Characteristic, hereby exemplify following examples, and be described in detail as follows:
A kind of baking method of ladle comprises the steps:
1) adopt the apparatus for baking of vertical structure, make the molten iron cover can vertically rotate the keying of fascinating;
2) low calorie fuels (combustion medium) upwards causes connecting mechanism for rotating from the frame side, is delivered to through large arm the burner that is arranged on the cover center and burns; Combustion air is provided by high pressure positive blower, enter connecting mechanism for rotating from the opposite side of frame, and carry out preheating by the heat exchanger around cover, combustion air temperature is preheated to more than 500 ℃, then be delivered in the burner that is arranged on the cover center and low calorie fuels mixing after-combustion, thereby realize that high-temp combustion improves the thermal efficiency, energy savings.
Above-mentioned steps 1) the driving power in is to be provided by surface-based electrical hoist, by the traction of fixed pulley, running block fascinate crank, connecting mechanism for rotating, drives large arm and the cover that is connected on large arm fascinates, and inclination maximum can reach 85 °.
Above-mentioned steps 2) combustion air in adopts HTAC, adopts heat-storage type fume residual heat recovering device, alternately switches air and flue gas by heat exchanger, makes it the heat storage of flowing through, and can reclaim to the full extent the sensible heat of high-temperature flue gas; Combustion air is preheated to temperature levels more than 800～1000 ℃, forms the novel flame far different with traditional flame, create the interior good uniform temperature of coming out of the stove and distribute; By the burning under the oxygen deprivation state, not only avoided generally high temperature heating power nitrogen oxide NO
XA large amount of generations, and further reduced on this basis NO
XDischarging.
Coal gas of converter, blast furnace gas that the source of medium and low heat value fuel of the present invention can utilize steel plant to reclaim can also mixed gases and other low heat value industrial combustion gas of recovery.
After using method of the present invention, 30～100 tons of ladle are toasted, its gaseous-pressure is 5-20KPa, and fuel gas with low heat value is 3～15MJ/Nm
3, in the iron bag, maximum temperature difference is no more than 50 ℃, and ladle baking time shorten 10～50% improves roasting bag ability 10～40%.
Embodiment 1
50 tons of ladle baking process, gaseous-pressure are 8KPa, and fuel gas with low heat value is 8MJ/Nm
3, in the iron bag, maximum temperature difference is no more than 30 ℃, and ladle baking time shorten 40% improves roasting bag ability 30%.
Embodiment 2
100 tons of ladle baking process, gaseous-pressure are 15KPa, and fuel gas with low heat value is 15MJ/Nm
3, in the iron bag, maximum temperature difference is no more than 50 ℃, and ladle baking time shorten 30% improves roasting bag ability 20%.
The invention has the advantages that the ignition temperature raising is beneficial to the technological requirement that realizes iron bag baking temperature, can guarantee smooth combustion; Combustion air temperature approaches temperature in bag, has greatly improved whole audience Temperature Distribution, makes it to be tending towards evenly, and the adaptation of available fuel value scope enlarges, and low calorie fuels can obtain effectively handy.Waste heat in recovered flue gas, realize the gas high-temperature low oxygen combustion to greatest extent, reduces the discharging of dusty gas, has energy-conservation and double action environmental protection, and economic and social benefit is remarkable.
Claims (3)
1. the baking method of a ladle, is characterized in that, comprises the steps:
1) adopt the apparatus for baking of vertical structure, make the molten iron cover can vertically rotate the keying of fascinating;
2) low calorie fuels upwards causes connecting mechanism for rotating from the frame side, is delivered to through large arm the burner that is arranged on the cover center and burns; Combustion air is provided by high pressure positive blower, enter connecting mechanism for rotating from the opposite side of frame, and carry out preheating by the heat exchanger around cover, and combustion air temperature is preheated to more than 500 ℃, then be delivered in the burner that is arranged on the cover center and low calorie fuels mixing after-combustion.
2. the baking method of a kind of ladle according to claim 1, it is characterized in that, described molten iron cover can vertically rotate the keying of fascinating, to provide driving power by surface-based electrical hoist, draw by fixed pulley, running block fascinate crank, connecting mechanism for rotating, the cover that drives large arm and be connected on large arm fascinates, and inclination maximum can reach 85 °.
3. the baking method of a kind of ladle according to claim 1, is characterized in that, described low calorie fuels is coal gas of converter, blast furnace gas or the mixed gas of steel plant's recovery and other low heat value industrial combustion gas of recovery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105867502A CN103100702A (en) | 2012-12-28 | 2012-12-28 | Hot metal ladle baking method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105867502A CN103100702A (en) | 2012-12-28 | 2012-12-28 | Hot metal ladle baking method |
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| Publication Number | Publication Date |
|---|---|
| CN103100702A true CN103100702A (en) | 2013-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105867502A Pending CN103100702A (en) | 2012-12-28 | 2012-12-28 | Hot metal ladle baking method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103433474A (en) * | 2013-08-16 | 2013-12-11 | 北京首钢国际工程技术有限公司 | Two-way conveying system for blast furnace molten iron conveying process of conveying ladle to bottom without stopping |
| CN114985716A (en) * | 2022-06-28 | 2022-09-02 | 东北大学 | Pure oxygen combustion type ladle baking device and method for recycling flue gas waste heat |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000020147A1 (en) * | 1998-10-08 | 2000-04-13 | Huta Buczek S.A. | The method for drying and heating of the casting ladle lining and the device to accomplish these processes |
| CN2920484Y (en) * | 2006-07-13 | 2007-07-11 | 武汉市致新材料有限公司 | Steel melting pouring basket high efficiency energy saving roaster |
| CN201493475U (en) * | 2009-09-11 | 2010-06-02 | 扬州宏诚冶金设备有限公司 | Ladle roasting device |
| CN202037333U (en) * | 2011-04-09 | 2011-11-16 | 江苏金石铸锻有限公司 | Roaster for steel teeming ladle |
| CN102806344A (en) * | 2012-09-06 | 2012-12-05 | 北京志能祥赢节能环保科技有限公司 | Oxygen-enriched ladle baking device by using low calorific value blast furnace coal gas |
-
2012
- 2012-12-28 CN CN2012105867502A patent/CN103100702A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000020147A1 (en) * | 1998-10-08 | 2000-04-13 | Huta Buczek S.A. | The method for drying and heating of the casting ladle lining and the device to accomplish these processes |
| CN2920484Y (en) * | 2006-07-13 | 2007-07-11 | 武汉市致新材料有限公司 | Steel melting pouring basket high efficiency energy saving roaster |
| CN201493475U (en) * | 2009-09-11 | 2010-06-02 | 扬州宏诚冶金设备有限公司 | Ladle roasting device |
| CN202037333U (en) * | 2011-04-09 | 2011-11-16 | 江苏金石铸锻有限公司 | Roaster for steel teeming ladle |
| CN102806344A (en) * | 2012-09-06 | 2012-12-05 | 北京志能祥赢节能环保科技有限公司 | Oxygen-enriched ladle baking device by using low calorific value blast furnace coal gas |
Non-Patent Citations (1)
| Title |
|---|
| 邬培爱等: "新型钢包烘烤器", 《工业加热》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103433474A (en) * | 2013-08-16 | 2013-12-11 | 北京首钢国际工程技术有限公司 | Two-way conveying system for blast furnace molten iron conveying process of conveying ladle to bottom without stopping |
| CN114985716A (en) * | 2022-06-28 | 2022-09-02 | 东北大学 | Pure oxygen combustion type ladle baking device and method for recycling flue gas waste heat |
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Application publication date: 20130515 |