CN112453375B - Method for utilizing ladle waste heat - Google Patents
Method for utilizing ladle waste heat Download PDFInfo
- Publication number
- CN112453375B CN112453375B CN202011141506.6A CN202011141506A CN112453375B CN 112453375 B CN112453375 B CN 112453375B CN 202011141506 A CN202011141506 A CN 202011141506A CN 112453375 B CN112453375 B CN 112453375B
- Authority
- CN
- China
- Prior art keywords
- alloy
- ladle
- baking
- baked
- temperature
- 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
- 239000002918 waste heat Substances 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 18
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 84
- 239000000956 alloy Substances 0.000 claims abstract description 84
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 44
- 239000010959 steel Substances 0.000 claims abstract description 44
- 238000001816 cooling Methods 0.000 claims abstract description 14
- 238000011084 recovery Methods 0.000 abstract description 3
- 238000005272 metallurgy Methods 0.000 abstract description 2
- 229910000914 Mn alloy Inorganic materials 0.000 description 7
- PYLLWONICXJARP-UHFFFAOYSA-N manganese silicon Chemical compound [Si].[Mn] PYLLWONICXJARP-UHFFFAOYSA-N 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D13/00—Apparatus for preheating charges; Arrangements for preheating charges
Abstract
The invention belongs to the technical field of metallurgy, and particularly relates to a method for utilizing ladle waste heat, which utilizes the ladle waste heat to bake alloy and at least comprises the following steps: a. transferring the alloy to be baked into a steel ladle, covering the steel ladle cover, baking at the first stage, and pouring the alloy out of the steel ladle when the alloy temperature is more than or equal to 600 ℃; b. adding new alloy to be baked immediately, covering the ladle cover for second-stage baking, and finishing when the alloy temperature is consistent with the temperature in the furnace. According to the invention, the alloy is baked by using the waste heat of the steel ladle, and the effective recovery of the heat in the steel ladle is realized by a sectional baking mode, so that the resource utilization rate is improved, the cooling of the steel ladle is accelerated, and the building period of the steel ladle is shortened.
Description
Technical Field
The invention belongs to the technical field of metallurgy, and particularly relates to a method for utilizing waste heat of a steel ladle.
Background
The ladle is an important container part for storing and transferring molten steel in metallurgical industry, and the structure of the ladle is composed of a steel shell and a lining, wherein the lining of the ladle comprises a working layer, an insulating layer and a permanent layer. The ladle lining is periodically washed and eroded by high-temperature molten steel, and must be replaced in time when the ladle lining reaches the service life, otherwise, the molten steel can permeate, and serious ladle penetration and serious safety accidents can be caused.
Before the lining of the ladle reaching the service life is removed, the ladle needs to be kept stand for 24-36 hours due to overhigh internal temperature, and then is removed after being naturally cooled, the maintenance period of the ladle can be prolonged in the standing process, heat resources contained in the lining of the ladle cannot be effectively utilized, and the ladle is wasted.
Disclosure of Invention
The invention provides a method for utilizing ladle waste heat, which aims at solving the technical problems that in the prior art, the ladle reaching the service life is long in standing and cooling time before replacing a lining and wastes heat resources.
In order to achieve the purpose of the invention, the embodiment of the invention adopts the following technical scheme:
the method for utilizing the waste heat of the ladle for baking the alloy by utilizing the waste heat of the ladle at least comprises the following steps of:
a. transferring the alloy to be baked into a steel ladle, covering a steel ladle cover to perform first-stage baking, and pouring the alloy out of the steel ladle when the alloy temperature is more than or equal to 600 ℃;
b. adding new alloy to be baked immediately, covering the ladle cover for second-stage baking, and finishing when the alloy temperature is consistent with the temperature in the furnace.
Compared with the prior art, the steel ladle with the service life can be selected as the steel ladle, the alloy is baked in a segmented mode by using the waste heat of the steel ladle, the effective recovery of the heat in the steel ladle can be realized, the resource utilization rate is improved, the cooling of the steel ladle is accelerated, and the building period of the steel ladle is shortened.
The ladle is preferably transferred to the position near the feeding port of the alloy bin before baking, so that the alloy to be baked can be conveniently added into the ladle by using a crown block, the baking efficiency is improved, the transportation process and time for baking the alloy are reduced, the recovery rate of thermal resources is improved, and the labor and equipment cost are saved.
Preferably, the internal temperature of the ladle before baking in the step a is 1300-1500 ℃.
Preferably, in the step a, the mass of the alloy to be baked is less than or equal to 10% of the nominal capacity of the ladle, and the baking time is 6-8 hours.
The optimized initial temperature, the baking quality and the baking time can ensure that the alloy temperature reaches over 600 ℃ after the baking in the first stage is finished, so that free water and crystal water in the baked alloy are effectively removed, and the heat waste caused by excessive baking is avoided.
Preferably, in step a, after the first baking stage baking is finished, the alloy of the ladle is poured out and cooled in an alloy special hopper.
Preferably, the cooling in step a is performed in the following manner: and cooling for 3-4 hours in an environment with the relative humidity less than or equal to 40%, and transferring the alloy to an underground storage bin to cool to room temperature.
The optimized cooling environment and the cooling mode can ensure the stability of the alloy in the cooling process and can not damage material transfer equipment.
Preferably, in the step b, after the baked alloy in the first stage is poured out, the alloy to be baked in the second stage is poured, and the mass of the alloy baked in the second stage is less than or equal to 5% of the nominal capacity of the ladle.
The optimized quality of the second-stage baked alloy can ensure that the alloy temperature is more than or equal to 200 ℃ after the second baking stage is finished, effectively remove free water in the baked alloy, and accelerate the temperature reduction of the steel ladle while effectively recovering heat.
The alloy after the second stage of baking can be transferred into a baking furnace for continuous baking.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The embodiment provides a method for baking alloy by using ladle waste heat, which specifically comprises the following steps:
transferring the steel ladle with nominal capacity of 120 tons and reaching the service life to the position near a feeding port of an alloy bunker, and measuring the internal temperature of the steel ladle to 1300 ℃ before baking.
Step a, transferring 8 tons of alloy to be baked into a steel ladle, covering the steel ladle cover, baking for 6 hours, and pouring out the steel ladle;
and (3) pouring the baked alloy out of the ladle, transferring the alloy into an alloy special hopper, measuring the temperature, cooling for 4 hours in a normal-temperature environment with the relative humidity of 35%, and transferring the alloy into an underground storage bin to be cooled to the room temperature.
And b, pouring out the alloy baked in the step a, immediately adding new silicon-manganese alloy to be baked, covering and baking until the alloy temperature is consistent with the temperature in the furnace, and finishing. And transferring the alloy into a baking furnace to be continuously baked after baking is finished, and removing and replacing the lining after the ladle is further cooled.
Example 2
The embodiment provides a method for baking alloy by using ladle waste heat, which specifically comprises the following steps:
transferring the steel ladle with nominal capacity of 120 tons and reaching the service life to the position near a feeding port of an alloy bunker, and measuring the internal temperature of the steel ladle to 1450 ℃ before baking.
Step a, transferring 9 tons of silicon-manganese alloy to be baked into a steel ladle, covering the steel ladle cover, baking for 7 hours, and pouring out the steel ladle;
and (3) pouring the baked alloy out of the ladle, transferring the alloy to an alloy special hopper, measuring the temperature, cooling for 4 hours in a normal-temperature environment with the relative humidity of 35%, and transferring the alloy to an underground storage bin to be cooled to the room temperature.
And b, pouring out the alloy baked in the step a, immediately adding 4 tons of silicon-manganese alloy to be baked into the ladle, covering the ladle cover, and baking until the alloy temperature is consistent with the temperature in the furnace. And transferring the alloy into a baking furnace to be continuously baked after baking is finished, and removing and replacing the lining after the ladle is further cooled.
Example 3
The embodiment provides a method for baking alloy by using ladle waste heat, which specifically comprises the following steps:
transferring the steel ladle with nominal capacity of 120 tons and reaching the service life to the position near a feeding port of an alloy bunker, and measuring the internal temperature of the steel ladle to be 1500 ℃ before baking.
Step a, transferring 10 tons of silicon-manganese alloy to be baked into a steel ladle, covering the steel ladle cover, baking for 8 hours, and pouring out the steel ladle;
and (3) pouring the baked alloy from the ladle, transferring the alloy to an alloy special hopper, measuring the temperature, cooling for 3 hours in a normal-temperature environment with the relative humidity of 40%, and transferring the alloy to an underground storage bin to be cooled to the room temperature.
And b, pouring out the alloy baked in the step a, immediately adding 6 tons of silicon-manganese alloy to be baked into the ladle, covering the ladle cover, and baking until the alloy temperature is consistent with the temperature in the furnace. And transferring the alloy into a baking furnace to be continuously baked after baking is finished, and removing and replacing the lining after the ladle is further cooled.
Example 4
The embodiment provides a method for baking alloy by using ladle waste heat, which specifically comprises the following steps:
the steel ladle with the nominal capacity of 120 tons is transferred to the position near a feeding port of an alloy bin, and the internal temperature of the steel ladle is measured to be 1500 ℃ before baking.
Step a, transferring 9 tons of silicon-manganese alloy to be baked into a steel ladle, covering the steel ladle cover, baking for 8 hours, and pouring out the steel ladle;
and (3) pouring the baked alloy out of the ladle, transferring the alloy to an alloy special hopper, measuring the temperature, cooling for 3 hours in a normal-temperature environment with the relative humidity of 35%, and transferring the alloy to an underground storage bin to be cooled to the room temperature.
And b, pouring out the alloy baked in the step a, immediately adding 5 tons of silicon-manganese alloy to be baked into the ladle, covering the ladle cover, and baking until the alloy temperature is consistent with the temperature in the furnace. And transferring the alloy into a baking furnace to be continuously baked after baking is finished, and removing and replacing the lining after the ladle is further cooled.
Effects of the invention
The post bake temperatures achieved for each example are shown in table 1.
TABLE 1 Effect of implementation
As can be seen from the implementation effects in Table 1, the alloy obtained by the embodiment of the invention after the first-stage baking has a temperature higher than 600 ℃, free water and bound water in the alloy are effectively removed, the alloy baking standard is reached, the alloy temperature after the second-stage baking is higher than 200 ℃, the free water in the alloy is effectively removed, the waste heat of the ladle is effectively recovered, and the ladle is cooled to about 200 ℃ within 12 hours, so that the building cycle of the ladle is shortened.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (4)
1. The method for utilizing the ladle waste heat is characterized in that the ladle waste heat is utilized to bake alloy, and the method at least comprises the following steps:
a. transferring the alloy to be baked into a ladle, covering the ladle cover, baking in a first stage, pouring the alloy out of the ladle when the alloy temperature is more than or equal to 600 ℃, wherein the internal temperature of the ladle before baking is 1300-1500 ℃, and the mass of the alloy to be baked in the first stage is less than or equal to 10% of the nominal capacity of the ladle;
b. and immediately adding new alloy to be baked, covering a ladle cover, baking at the second stage, finishing the baking when the alloy temperature is consistent with the temperature in the furnace, wherein the mass of the alloy to be baked at the second stage is less than or equal to 5 percent of the nominal capacity of the ladle.
2. The method for utilizing the ladle waste heat according to claim 1, wherein the baking time of the first stage is 6-8 hours.
3. The method for utilizing the residual heat of the steel ladle as claimed in claim 1, wherein the alloy in the poured steel ladle is cooled in an alloy special hopper after the first-stage baking is finished.
4. The method for utilizing the ladle waste heat according to claim 3, wherein the cooling mode is as follows: and cooling for 3-4 hours in a normal temperature environment with the relative humidity less than or equal to 40%, and transferring the alloy to an underground storage bin to cool to room temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011141506.6A CN112453375B (en) | 2020-10-22 | 2020-10-22 | Method for utilizing ladle waste heat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011141506.6A CN112453375B (en) | 2020-10-22 | 2020-10-22 | Method for utilizing ladle waste heat |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112453375A CN112453375A (en) | 2021-03-09 |
| CN112453375B true CN112453375B (en) | 2022-06-14 |
Family
ID=74834103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011141506.6A Expired - Fee Related CN112453375B (en) | 2020-10-22 | 2020-10-22 | Method for utilizing ladle waste heat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112453375B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5865567A (en) * | 1981-10-13 | 1983-04-19 | Fujio Watanabe | Drying method for new ladle by utilizing sensible heat of slag |
| CN101381790A (en) * | 2008-10-23 | 2009-03-11 | 衡阳华菱连轧管有限公司 | Method for horizontal continuous casting 10Cr9Mo1VNbN ferrite heat-resistant steel to tube round blank through electric stove smelting |
| CN108642230A (en) * | 2018-06-01 | 2018-10-12 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of scrap steel preheating method, semi-steel making process and the method for improving steel scrap consumption using semisteel smelting |
| CN108715914A (en) * | 2018-06-01 | 2018-10-30 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of scrap steel preheating method, semi-steel making process and the method for improving molten steel yield using semisteel smelting |
| CN109405415A (en) * | 2018-12-03 | 2019-03-01 | 钢城集团凉山瑞海实业有限公司 | Steel ladle drainage agent apparatus for baking |
-
2020
- 2020-10-22 CN CN202011141506.6A patent/CN112453375B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5865567A (en) * | 1981-10-13 | 1983-04-19 | Fujio Watanabe | Drying method for new ladle by utilizing sensible heat of slag |
| CN101381790A (en) * | 2008-10-23 | 2009-03-11 | 衡阳华菱连轧管有限公司 | Method for horizontal continuous casting 10Cr9Mo1VNbN ferrite heat-resistant steel to tube round blank through electric stove smelting |
| CN108642230A (en) * | 2018-06-01 | 2018-10-12 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of scrap steel preheating method, semi-steel making process and the method for improving steel scrap consumption using semisteel smelting |
| CN108715914A (en) * | 2018-06-01 | 2018-10-30 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of scrap steel preheating method, semi-steel making process and the method for improving molten steel yield using semisteel smelting |
| CN109405415A (en) * | 2018-12-03 | 2019-03-01 | 钢城集团凉山瑞海实业有限公司 | Steel ladle drainage agent apparatus for baking |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112453375A (en) | 2021-03-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8096346B2 (en) | Method for casting high-power wind turbine base with ductile iron | |
| CN112453375B (en) | Method for utilizing ladle waste heat | |
| CN114317870A (en) | Method for directly returning hot-state casting residue to converter | |
| CN102161090B (en) | Method for improving self-feeding capacity of high and thick large-cross section casting blank | |
| CN112176138A (en) | Blast furnace hearth masonry structure for eliminating blast furnace air gap | |
| CN219567998U (en) | Alloy ingot cooling heat recycling equipment | |
| CN109719241B (en) | Short-process casting and forging integrated process for steel | |
| CN110129548B (en) | Design method suitable for steel ingot ultra-high temperature hot delivery and heating process | |
| CN201760587U (en) | Ladle covering technique suitable for various refining outside furnace | |
| CN104928589A (en) | High-manganese-steel lining plate for ball mill and manufacturing method thereof | |
| CN204630367U (en) | A kind of alloy holding furnace slag hole device of safety and stability | |
| CN104911285B (en) | The processing method of slag more than a kind of casting | |
| CN110039012B (en) | Cast steel riser covering agent and preparation and use methods thereof | |
| CN210165772U (en) | Cold quick-witted partition wall of ring that forced air cooling and water-cooling combined together | |
| CN202018192U (en) | Deep reduction and cooling device of direct reduced iron stabilizing bin of rotary kiln | |
| CN101254530A (en) | Copper alloy antivacuum adding Zircomium engineering technology equipment and technological process thereof | |
| CN102294418A (en) | Production method of ring forging | |
| CN103341594A (en) | Casting method of brake shell | |
| CN101634524B (en) | Casting method of electric furnace water cooling cast steel furnace cover | |
| CN204944169U (en) | Casting smelting intermediate frequency furnace increase part | |
| CN214290814U (en) | Novel torpedo jar of resistant erosion | |
| CN110029239A (en) | A kind of oxygen-free copper production technology | |
| CN115055652B (en) | Fine casting method for ferroalloy | |
| CN109186793B (en) | Method for measuring heat preservation performance of metallurgical melt heat preservation agent | |
| CN108485684A (en) | A kind of dry quenching coke pot lining plate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220614 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |