CN112877490A - Method for optimizing cooling strength of oxygen tuyere of Ou metallurgical furnace - Google Patents
Method for optimizing cooling strength of oxygen tuyere of Ou metallurgical furnace Download PDFInfo
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- CN112877490A CN112877490A CN202110132683.6A CN202110132683A CN112877490A CN 112877490 A CN112877490 A CN 112877490A CN 202110132683 A CN202110132683 A CN 202110132683A CN 112877490 A CN112877490 A CN 112877490A
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- pump
- tuyere
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- flow rate
- oxygen
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
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- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Blast Furnaces (AREA)
Abstract
The invention discloses a method for optimizing the cooling strength of an oxygen tuyere of an Ou-smelting furnace, which comprises the following steps: 1. the cooling water quantity of the oxygen tuyere of the Europe smelting furnace is increased, the flow rate of the cooling water quantity is 7.6024m/s, the pipe diameter of the water inlet pipe of the tuyere small sleeve is phi 95 x 6mm, and the water speed is increased to 14.87m/s after the front cavity and the rear cavity of the oxygen tuyere small sleeve are intensively cooled by all key water; 2. the pump head is improved, the pump head lift is improved, 3 pump heads are installed at the position of an original pump through basic extension of the pump and on the basis of the original pump, each pump head with the flow rate of 550m3/h is opened for one in normal production, and the actual flow rate can reach 1000m 3/h. The invention can prolong the service life of the tuyere of the Ou-Meta furnace, stabilize the production continuity of the Ou-Meta furnace and improve the operation rate of the Ou-Meta furnace.
Description
Technical Field
The invention relates to a method for optimizing the cooling strength of an oxygen tuyere of an Ou-metallurgical furnace.
Background
The forebody of the Europe and metallurgy furnace is a COREX furnace, which is the most advanced COREX in the world, is transformed from Bao steel Lujing to eight steel through a series of process technologies, has the technical characteristics of the process, and is called the Europe and metallurgy furnace. The tuyere damage is a main production factor which restricts production and influences the operation rate in a Bao steel COREX-3000 and an eight-steel Ou-Mo furnace. Since COREX-3000 was put into production at Bao Fei Jing, namely 12 months 2007, the oxygen tuyere damage occurred soon after the putting into production, and 6 damaged tuyeres were generated. In 4 months, 8 months, 10 months, 11 months and 3 months in 2009, the air ports are largely damaged in a short time, and the maximum monthly damaged air ports reach 18-20. After coal injection operation in 2009 in 4 months, tuyere breakage was increased. The number of the 2-4 months of 2010 continuous three-month damages is respectively 20, 30 and 21, the average number of the three-month damages is about 10, the damping-down time caused by the tuyere damage accounts for more than 40% of the total damping-down time, the average service life of the tuyere is less than 3 months, and the shortest service time is only 3 days. After the Ou metallurgical furnace is started, the oxygen tuyere small sleeve is frequently damaged, and the number of the tuyere small sleeve is 24 after the furnace is started for 60 days. The large amount and frequent breakage of the tuyere not only seriously affect the production stability (operation rate), cause the increase of the unplanned downtime and the low smelting rate, but also greatly increase the fuel consumption, the nitrogen consumption, the overhaul cost and the production spare part consumption, and cause huge pressure to the production cost of the European and metallurgical furnaces.
Disclosure of Invention
The invention aims to provide a method for optimizing the cooling strength of an oxygen tuyere of an Ou-Meta furnace, which can prolong the service life of the tuyere of the Ou-Meta furnace, stabilize the production continuity of the Ou-Meta furnace and improve the operation rate of the Ou-Meta furnace.
The method for optimizing the cooling strength of the oxygen tuyere of the Ou-smelting furnace for achieving the aim comprises the following steps of: 1. the cooling water quantity of the oxygen tuyere of the Europe smelting furnace is increased, the flow rate of the cooling water quantity is 7.6024m/s, the pipe diameter of the water inlet pipe of the tuyere small sleeve is phi 95 x 6mm, and the water speed is increased to 14.87m/s after the front cavity and the rear cavity of the oxygen tuyere small sleeve are intensively cooled by all key water; 2. the pump head is improved, the pump head lift is improved, 3 pump heads are installed at the position of an original pump through basic extension of the pump and on the basis of the original pump, each pump head with the flow rate of 550m3/h is opened for one in normal production, and the actual flow rate can reach 1000m 3/h.
The method is used for tapping and shutting the Europe smelting furnace for prolonging the service life of the tuyere small sleeve, the furnace is opened for 100 days, only three tuyeres are burnt and damaged, and compared with the method before transformation, the loss of the tuyere small sleeve is directly reduced by 30, the direct cost is 42 ten thousand yuan, the coke ratio is saved by 10 kilograms (the coke ratio is increased by blowing down each time), and the nitrogen consumption is reduced by 6000m 3/h.
Detailed Description
A method for optimizing the cooling strength of an oxygen tuyere of an Ou-metallurgical furnace comprises the following steps: 1. the cooling water quantity of the oxygen tuyere of the Europe smelting furnace is increased, the flow rate of the cooling water quantity is 7.6024m/s, the pipe diameter of the water inlet pipe of the tuyere small sleeve is phi 95 x 6mm, and the water speed is increased to 14.87m/s after the front cavity and the rear cavity of the oxygen tuyere small sleeve are intensively cooled by all key water; 2. the pump head is improved, the pump head lift is improved, 3 pump heads are installed at the position of an original pump through basic extension of the pump and on the basis of the original pump, each pump head with the flow rate of 550m3/h is opened for one in normal production, and the actual flow rate can reach 1000m 3/h.
Claims (1)
1. A method for optimizing the cooling strength of an oxygen tuyere of an Ou-metallurgical furnace is characterized by comprising the following steps: 1. the cooling water quantity of the oxygen tuyere of the Europe smelting furnace is increased, the flow rate of the cooling water quantity is 7.6024m/s, the pipe diameter of the water inlet pipe of the tuyere small sleeve is phi 95 x 6mm, and the water speed is increased to 14.87m/s after the front cavity and the rear cavity of the oxygen tuyere small sleeve are intensively cooled by all key water; 2. the pump head is improved, the pump head lift is improved, 3 pump heads are installed at the position of an original pump through basic extension of the pump and on the basis of the original pump, each pump head with the flow rate of 550m3/h is opened for one in normal production, and the actual flow rate can reach 1000m 3/h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110132683.6A CN112877490A (en) | 2021-02-01 | 2021-02-01 | Method for optimizing cooling strength of oxygen tuyere of Ou metallurgical furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110132683.6A CN112877490A (en) | 2021-02-01 | 2021-02-01 | Method for optimizing cooling strength of oxygen tuyere of Ou metallurgical furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112877490A true CN112877490A (en) | 2021-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110132683.6A Pending CN112877490A (en) | 2021-02-01 | 2021-02-01 | Method for optimizing cooling strength of oxygen tuyere of Ou metallurgical furnace |
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| CN (1) | CN112877490A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116179779A (en) * | 2023-02-24 | 2023-05-30 | 新疆八一钢铁股份有限公司 | Method for prolonging service life of oxygen tuyere of European smelting furnace and adjustable tuyere assembly |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006124804A (en) * | 2004-10-29 | 2006-05-18 | Jfe Steel Kk | Method for supplying cooling gas into molten metal refining furnace |
| CN102242233A (en) * | 2010-05-13 | 2011-11-16 | 上海宝钢设备检修有限公司 | Oxygen blasting tuyere of COREX (coal reduction extreme) furnace |
| CN204550642U (en) * | 2015-04-23 | 2015-08-12 | 中冶京诚工程技术有限公司 | Tuyere small sleeve |
| CN209508303U (en) * | 2019-01-24 | 2019-10-18 | 新疆八一钢铁股份有限公司 | The safe circulatory system of the air port Ou Yelu cooling water channel open circuit |
| CN111850206A (en) * | 2020-08-11 | 2020-10-30 | 新疆八一钢铁股份有限公司 | Improved blast furnace blowing composite tuyere |
-
2021
- 2021-02-01 CN CN202110132683.6A patent/CN112877490A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006124804A (en) * | 2004-10-29 | 2006-05-18 | Jfe Steel Kk | Method for supplying cooling gas into molten metal refining furnace |
| CN102242233A (en) * | 2010-05-13 | 2011-11-16 | 上海宝钢设备检修有限公司 | Oxygen blasting tuyere of COREX (coal reduction extreme) furnace |
| CN204550642U (en) * | 2015-04-23 | 2015-08-12 | 中冶京诚工程技术有限公司 | Tuyere small sleeve |
| CN209508303U (en) * | 2019-01-24 | 2019-10-18 | 新疆八一钢铁股份有限公司 | The safe circulatory system of the air port Ou Yelu cooling water channel open circuit |
| CN111850206A (en) * | 2020-08-11 | 2020-10-30 | 新疆八一钢铁股份有限公司 | Improved blast furnace blowing composite tuyere |
Non-Patent Citations (2)
| Title |
|---|
| 刘新生: "天铁4号高炉长寿技术探讨", 《天津冶金》 * |
| 田果: "欧冶炉氧气风口喷吹煤气的结构变化", 《第十二届中国钢铁年会论文集—1.炼铁与原料》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116179779A (en) * | 2023-02-24 | 2023-05-30 | 新疆八一钢铁股份有限公司 | Method for prolonging service life of oxygen tuyere of European smelting furnace and adjustable tuyere assembly |
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Application publication date: 20210601 |