CN112126739A - Method for pressing smoke in ladle - Google Patents
Method for pressing smoke in ladle Download PDFInfo
- Publication number
- CN112126739A CN112126739A CN202010945326.7A CN202010945326A CN112126739A CN 112126739 A CN112126739 A CN 112126739A CN 202010945326 A CN202010945326 A CN 202010945326A CN 112126739 A CN112126739 A CN 112126739A
- Authority
- CN
- China
- Prior art keywords
- ladle
- smoke
- foundry
- agent
- pressing
- 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.)
- Pending
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/38—Removal of waste gases or dust
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D45/00—Equipment for casting, not otherwise provided for
- B22D45/005—Evacuation of fumes, dust or waste gases during manipulations in the foundry
Abstract
The invention discloses a method for pressing smoke by a ladle, which comprises the following steps: 1) after the ladle is filled with iron, the ladle is lifted to a pressure smoke agent position; 2) the adding amount is controlled at 50 kg/ladle; 3) lowering the ladle to a throwing smoke suppression agent position, throwing and adding after the ladle is stopped stably, wherein the adding amount is controlled to be 10kg each time, and adding is finished by 5 times; 4) the tobacco pressing agent should be thrown dispersedly when being thrown; 5) after the casting is finished, the ladle is hung to the position of the iron conveying line and is hung down to the iron conveying vehicle, and the hanging down should be stable; according to the method for pressing the smoke of the foundry ladle, disclosed by the invention, when the foundry ladle leaves the secondary dust removal smoke hood of the converter after the converter is added with molten iron, the secondary dust removal smoke hood cannot collect smoke emitted by the foundry ladle, or the foundry ladle is remained to cause serious smoke emission due to process requirements, the smoke pressing agent is added into the foundry ladle to inhibit the smoke emission of the foundry ladle; further, the method is beneficial to reducing smoke emission of the steel plant, reducing pollution to the atmosphere, improving the environmental protection capability of the steel plant and achieving the aim of clean steel making.
Description
Technical Field
The invention relates to the technical field of steelmaking, in particular to a method for pressing smoke in a ladle.
Background
At present, the domestic steel plant only attaches importance to primary dust removal and secondary dust removal, but generally neglects the control of smoke emission of the ladle after molten iron is completely mixed. The smoke is serious after the ladle leaves the secondary dust removal smoke hood of the converter after the iron is added, and particularly the smoke of the ladle is abnormal and serious after the iron is left in process requirements or special conditions. The main reason why the foundry ladle smokes is that the high-temperature molten iron in the foundry ladle directly contacts with air, so that carbon in the molten iron reacts with oxygen in the air to release heat, the molten iron is evaporated, and iron atoms enter the air and then react with the oxygen to generate yellow brown iron oxide. Thus causing dust pollution to the atmosphere and deteriorating the working environment of workers in the steel plant. The urgent need to be solved under the increasingly strict requirements of the current national environmental protection law. Therefore, in order to meet the requirements of environmental protection and clean steel making, a method for pressing smoke of the ladle is urgently needed to be designed, so that the problem that smoke is generated seriously after the existing ladle leaves a secondary dust removal smoke hood of a converter after iron is added is solved.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a method for pressing smoke by a ladle.
The technical scheme adopted by the invention for solving the technical problems is as follows: a method for pressing smoke in a ladle comprises the following steps:
1) after the ladle is filled with iron, the ladle is lifted to a pressure smoke agent position;
2) the adding amount is controlled at 50 kg/ladle;
3) lowering the ladle to a throwing smoke suppression agent position, throwing and adding after the ladle is stopped stably, wherein the adding amount is controlled to be 10kg each time, and adding is finished by 5 times;
4) the tobacco pressing agent should be thrown dispersedly when being thrown;
5) after the ladle is thrown, the ladle is hung to the position of the iron conveying line and is hung down to the iron conveying vehicle, and the hanging down should be stable.
Specifically, the smoke suppression agent position in the step 1 refers to a position where the ladle passes through a crossover line, namely a waiting position for converter charging.
Specifically, the adding amount in the step 2 is controlled at 50 kg/ladle, and the adding total amount is controlled at 50 kg/ladle, so that the production rhythm is ensured.
Specifically, the smoke suppression agent in the step 3 refers to 36% of CaO content and SiO content236% of MgO, 6% of Al2O3Content 7% Fe2O3Content 1%, H2The content of O is 0.1 percent and other impurities.
Specifically, the step 4 of scattering and throwing the smoke suppression agent refers to a plurality of throwing points each time the smoke suppression agent is thrown into the ladle, and the points are used for fully covering the exposed molten iron surface at different positions when the smoke suppression agent is thrown.
Specifically, the step 5 of hoisting the ladle to the iron conveying line position and hoisting the ladle to the iron conveying vehicle after the throwing is completed means that the hoisting personnel should be stable when commanding the crane operators to hoist the ladle, and the ladle is used for pressing the exposed molten iron without floating up and down.
The invention has the following beneficial effects:
according to the method for pressing the smoke of the foundry ladle, disclosed by the invention, when the foundry ladle leaves the secondary dust removal smoke hood of the converter after the converter is added with molten iron, the secondary dust removal smoke hood cannot collect smoke emitted by the foundry ladle, or the foundry ladle is remained to cause serious smoke emission due to process requirements, the smoke pressing agent is added into the foundry ladle to inhibit the smoke emission of the foundry ladle; further, the method is beneficial to reducing smoke emission of the steel plant, reducing pollution to the atmosphere, improving the environmental protection capability of the steel plant and achieving the aim of clean steel making.
Detailed Description
The technical scheme in the embodiment of the invention is clearly and completely further detailed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A method for pressing smoke in a ladle comprises the following steps:
1) after the ladle is filled with iron, the ladle is lifted to a pressure smoke agent position;
2) the adding amount is controlled at 50 kg/ladle;
3) lowering the ladle to a throwing smoke suppression agent position, throwing and adding after the ladle is stopped stably, wherein the adding amount is controlled to be 10kg each time, and adding is finished by 5 times;
4) the tobacco pressing agent should be thrown dispersedly when being thrown;
5) after the ladle is thrown, the ladle is hung to the iron conveying line and hung down to the iron conveying vehicle, and the ladle should be stable when hung down, so that the phenomenon that the molten iron is rocked to influence the smoke suppression effect of the smoke suppression agent is prevented.
The smoke suppression agent position is a waiting position for charging iron in the converter after the iron ladle passes through the crossover line. The adding amount is controlled at 50 kg/ladle, and the total adding amount is controlled at 50 kg/ladle to ensure the production rhythm. The scattered throwing of the smoke pressing agent refers to that a plurality of throwing points are formed when the smoke pressing agent is thrown into the ladle every time, so that the situation that the smoke pressing agent is thrown at one position, the accumulation of the smoke pressing agent cannot fully cover the exposed liquid level of the iron, and the smoke pressing effect is influenced is avoided. After the ladle is thrown, the ladle is hung to the position of the iron conveying line and hung on the iron conveying vehicle, and the hanging is stable when the operator commands the vehicle to hang, so that the phenomenon that the molten iron is shaken to influence the vertical floating of the smoke suppression agent and the naked molten iron to influence the smoke suppression effect when the ladle is placed in a ladle is prevented.
The components of the smoke suppression agent react with the molten iron to achieve the effect of smoke dust elimination
And (3) pressing a cigarette to be processed:
1)Fe2O3+X＝X2O3+2Fe X2O3is a non-smoking solid
CaO+2SiO2+Al2O3＝CaO·Al2O3·2SiO2
2) The smoke pressing agent is a low-melting-point slag system with a melting point of 900 ℃, molten iron is melted into a molten state when the molten iron is wrapped in the molten iron,covering molten iron to prevent residual molten iron from contacting with oxygen and sticky slag to form Fe2O3Yellow smoke.
The proportioning content of the smoke pressing agent
Example 1 the smoke suppressant used was CaO 32%, SiO230% of MgO, 4% of Al2O3Content 4% Fe2O32 percent of the content, 2 percent of H2O and other impurities X are added into the molten iron of the foundry ladle, and strong yellow smoke is emitted after 1 minute.
Example 2 the smoke suppressant used was 38% CaO, SiO240% of MgO, 9% of Al2O39% of Fe2O3Content 2%, H2The O content is 1 percent and other impurities X are added into the molten iron of the foundry ladle, and the smoke is generated after 2.5 minutes.
Example 3 the smoke suppressant used was CaO 36%, SiO235% of MgO, 6% of Al2O3Content 6% Fe2O3Content 1%, H2The O content is 1 percent and other impurities X are added into the molten iron of the foundry ladle, and a little smoke is emitted after 10 minutes.
Example 4 the smoke suppressant used was CaO 36%, SiO236% of MgO, 6% of Al2O3Content 7% Fe2O3Content 1%, H2The O content is 0.1 percent and other impurities X are added into the molten iron of the foundry ladle, and no smoke is generated within 30 minutes.
The present invention is not limited to the above embodiments, and any structural changes made under the teaching of the present invention shall fall within the scope of the present invention, which is similar or similar to the technical solutions of the present invention.
The techniques, shapes, and configurations not described in detail in the present invention are all known techniques.
Claims (6)
1. The method for pressing the smoke in the ladle is characterized by comprising the following steps of:
1) after the ladle is filled with iron, the ladle is lifted to a pressure smoke agent position;
2) the adding amount is controlled at 50 kg/ladle;
3) lowering the ladle to a throwing smoke suppression agent position, throwing and adding after the ladle is stopped stably, wherein the adding amount is controlled to be 10kg each time, and adding is finished by 5 times;
4) the tobacco pressing agent should be thrown dispersedly when being thrown;
5) after the ladle is thrown, the ladle is hung to the position of the iron conveying line and is hung down to the iron conveying vehicle, and the hanging down should be stable.
2. The method for suppressing the smoke of the foundry ladle according to claim 1, wherein the smoke suppression agent level in the step 1 is a level at which the foundry ladle passes through a crossover line, i.e., a waiting level for converter charging.
3. The method for pressing the smoke of the foundry ladle according to claim 1, wherein the adding amount in the step 2 is controlled to be 50 kg/foundry ladle, and the adding amount is controlled to be 50 kg/foundry ladle, so as to ensure the production rhythm.
4. The method for pressing the smoke in the foundry ladle according to claim 1, wherein the smoke pressing agent in the step 3 is CaO content of 36 percent and SiO content236% of MgO, 6% of Al2O3Content 7% Fe2O3Content 1%, H2The content of O is 0.1 percent and other impurities.
5. The method for suppressing the smoke of a ladle according to claim 1, wherein the scattered throwing of the smoke suppressing agent in the step 4 is a plurality of throwing points each time the smoke suppressing agent is thrown into the ladle, for the smoke suppressing agent to be thrown to sufficiently cover the exposed liquid iron surface at different positions.
6. The method for suppressing the smoke of the foundry ladle according to claim 1, wherein the hoisting of the foundry ladle to the position of the iron conveying line and the hoisting of the foundry ladle to the iron conveying vehicle after the throwing in the step 5 are performed, which means that the hoisting personnel should be stable when commanding the crane operators to hoist and the hoisting personnel should be used for suppressing the smoke agent from floating up and down to expose the molten iron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010945326.7A CN112126739A (en) | 2020-09-10 | 2020-09-10 | Method for pressing smoke in ladle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010945326.7A CN112126739A (en) | 2020-09-10 | 2020-09-10 | Method for pressing smoke in ladle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112126739A true CN112126739A (en) | 2020-12-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010945326.7A Pending CN112126739A (en) | 2020-09-10 | 2020-09-10 | Method for pressing smoke in ladle |
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| Country | Link |
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| CN (1) | CN112126739A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115141000A (en) * | 2022-07-13 | 2022-10-04 | 山东国茂冶金材料有限公司 | Smoke suppressant for hot-metal bottle and preparation method and application thereof |
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| JP2009293109A (en) * | 2008-06-09 | 2009-12-17 | Jfe Steel Corp | Method for preventing occurrence of dust in returning operation for remained molten metal |
| CN101653819A (en) * | 2009-05-25 | 2010-02-24 | 莱芜钢铁股份有限公司 | Continuous casting tundish hollow particle carbon-free covering agent and preparation method thereof |
| 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 |
| CN105063271A (en) * | 2015-09-08 | 2015-11-18 | 攀钢集团西昌钢钒有限公司 | Pig-iron ladle environment-friendly dust removal method |
| CN106311998A (en) * | 2015-06-26 | 2017-01-11 | 鞍钢股份有限公司 | Preparation and application method of molten steel covering flux |
| CN109504818A (en) * | 2018-12-20 | 2019-03-22 | 首钢京唐钢铁联合有限责任公司 | A method of it controlling half steel in complete three de- techniques and smolders |
-
2020
- 2020-09-10 CN CN202010945326.7A patent/CN112126739A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009293109A (en) * | 2008-06-09 | 2009-12-17 | Jfe Steel Corp | Method for preventing occurrence of dust in returning operation for remained molten metal |
| CN101653819A (en) * | 2009-05-25 | 2010-02-24 | 莱芜钢铁股份有限公司 | Continuous casting tundish hollow particle carbon-free covering agent and preparation method thereof |
| 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 |
| CN106311998A (en) * | 2015-06-26 | 2017-01-11 | 鞍钢股份有限公司 | Preparation and application method of molten steel covering flux |
| CN105063271A (en) * | 2015-09-08 | 2015-11-18 | 攀钢集团西昌钢钒有限公司 | Pig-iron ladle environment-friendly dust removal method |
| CN109504818A (en) * | 2018-12-20 | 2019-03-22 | 首钢京唐钢铁联合有限责任公司 | A method of it controlling half steel in complete three de- techniques and smolders |
Non-Patent Citations (1)
| Title |
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| 朱苗勇: "《现代冶金工艺学—钢铁冶金卷》", 31 December 2016 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115141000A (en) * | 2022-07-13 | 2022-10-04 | 山东国茂冶金材料有限公司 | Smoke suppressant for hot-metal bottle and preparation method and application thereof |
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Application publication date: 20201225 |