CN115449575A - Water collecting and draining method after integral casting of blast furnace hearth - Google Patents
Water collecting and draining method after integral casting of blast furnace hearth Download PDFInfo
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- CN115449575A CN115449575A CN202211033559.5A CN202211033559A CN115449575A CN 115449575 A CN115449575 A CN 115449575A CN 202211033559 A CN202211033559 A CN 202211033559A CN 115449575 A CN115449575 A CN 115449575A
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- blast furnace
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/14—Discharging devices, e.g. for slag
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
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Abstract
The application discloses a water collecting and draining method after integral casting of a blast furnace hearth, which relates to the technical field of long service life of blast furnaces and comprises the following steps: 1) Determining the positions and the number of the drain holes according to the positions and the number of the cooling walls of the blast furnace; 2) Drilling a drain hole on the blast furnace; 3) Fixing a drainage tube on a drainage hole, arranging a drainage control valve at one end of the drainage tube far away from the blast furnace, connecting the drainage control valve with a water collecting hopper through a collecting pipe, and igniting the collecting pipe entering the inlet of the water collecting hopper by using coal gas fire; 4) A liquid level display is arranged in the water collecting hopper, the water collecting hopper is led to the drainage ditch through a measuring pipeline, a measuring control valve is arranged in the measuring pipeline, and a flowmeter is additionally arranged; 5) Opening a drainage control valve after the oven starts to work, selectively opening a measurement control valve according to the liquid level condition in the water collecting hopper to discharge water to a drainage ditch, and recording the water discharge amount through a flowmeter; the problems of three sets of overflow of the tuyere, iron notch splashing, direct water coming from the iron notch and the like caused by incomplete drying of water in the casting material after the blast furnace is started are avoided.
Description
Technical Field
The application relates to the technical field of long service life of blast furnaces, in particular to a water collecting and draining method after integral casting of a blast furnace hearth.
Background
The long service life problem of the blast furnace hearth is an urgent problem to be solved in the field of iron making. For a long time, the only means for solving the problem of long service life of the hearth is to build the carbon bricks of the hearth again, and a hearth integral casting technology is gradually developed in recent years and is gradually popularized and applied from a small blast furnace to a large blast furnace. Whether the hearth problem is treated by re-bricking the hearth carbon bricks or the integral casting technology of the hearth, strict furnace baking operation must be carried out to discharge the moisture in the blast furnace before the blast furnace is opened. Because the moisture content in the casting material is far greater than that in the carbon bricks, the problem of drainage of the blast furnace adopting the integral casting technology to repair the hearth is more important.
At present, the traditional furnace baking process is still adopted for the blast furnace adopting the furnace hearth integral casting technology to repair the furnace hearth, although measures such as increasing the furnace baking temperature, prolonging the furnace baking time, blowing-out the furnace hearth cooling water, raising the temperature of the steam heating cooling water and the like are adopted in recent years to try to discharge the water in the furnace hearth to the maximum extent, the effect is not ideal, and the following problems are mainly caused: 1. after air supply, water overflows from the joints of the three sets of the air ports, so that the coal gas in the area of the air ports is easy to leak; 2. after air supply, the furnace hearth is heated gradually, and a large amount of residual moisture overflows from the taphole to easily cause the taphole splashing and be not beneficial to the taphole pore passage maintenance; 3. the tap hole is directly supplied with water, the blast furnace is forced to reduce the production, improve the coke ratio adaptation, and have great influence on the blast furnace index.
Disclosure of Invention
The utility model aims to provide a water collecting and draining method after the integral casting of a blast furnace hearth, which aims to solve the technical problems existing in the prior art: the technical problems that the furnace drying efficiency is low and the moisture of the casting material is difficult to thoroughly remove in the prior art are solved.
In order to solve the technical problem, the following technical scheme is adopted in the application:
the first aspect of the embodiment of the application provides a water collecting and draining method after integral casting of a blast furnace hearth, which comprises the following steps:
1) Determining the positions and the number of the drain holes according to the positions and the number of the cooling walls of the blast furnace;
2) Drilling a drain hole on the blast furnace;
3) Fixing a drainage tube on a drainage hole, arranging a drainage control valve at one end of the drainage tube far away from the blast furnace, connecting the drainage control valve with a water collecting hopper through a collecting pipe, and igniting the collecting pipe entering the inlet of the water collecting hopper by using coal gas fire;
4) A liquid level display is arranged in the water collecting hopper, the water collecting hopper is led to the drainage ditch through a measuring pipeline, a measuring control valve is arranged in the measuring pipeline, and a flowmeter is additionally arranged;
5) Opening a drainage control valve after the oven starts to work, selectively opening a measurement control valve according to the liquid level condition in the water collecting hopper to discharge water to a drainage ditch, and recording the water discharge amount through a flowmeter; and after the work of the oven is finished, intermittently opening the drainage control valve, and closing the drainage control valve and sealing the drainage holes in a grouting manner when the total drainage quantity is close to the total water content of the castable or each drainage pipe almost does not drain any more.
In some embodiments, the method for determining the position and number of the drainage holes in step 1) is: the total number of the holes is determined according to the number of the cooling walls at the hearth part of the blast furnace and the principle that 7-8 cooling walls are provided with a drain hole, the circumferential position of the holes is selected between the two cooling walls, the horizontal position is selected to be 1200mm below the elevation of the residual iron eye of the blast furnace, and the drain holes are uniformly distributed.
In some embodiments, the method for drilling the drain hole in step 2) is: an outer hole with the diameter of 50mm is drilled in the outer layer of the blast furnace shell, a filling layer of the blast furnace shell is arranged in an inner hole communicated with the outer hole, and the depth of the inner hole is higher than the cold surface of the cooling wall of the blast furnace.
In some embodiments, the fixing method of the drainage tube in step 3) is: and inserting the drainage tube into the outer hole, wherein the front end of the drainage tube is flush with the inner side of the furnace shell, and welding the drainage tube on the furnace shell.
In some embodiments, the flow-diversion valve in step 3) is an electrically controlled valve connected to the control train of the blast furnace.
In some embodiments, the drainage valve in step 3) is connected to the drainage tube via a quick-connect.
In some embodiments, the liquid level display in the step 4) is connected with a control system of the blast furnace, and a worker can observe the liquid level condition in the water collecting hopper through a display device of a blast furnace workshop.
In some embodiments, the measurement control valve in step 4) is an electrically controlled valve.
In some embodiments, the measurement control valve and the flow meter in step 4) are connected to a control system of the blast furnace.
In some embodiments, the period of intermittently opening the drainage control valve after the end of the oven operation in step 5) is 2 to 4 hours. According to the technical scheme, the method has at least the following advantages and positive effects:
according to the water collecting and draining method after the blast furnace hearth is integrally cast, the drainage tube is arranged through the furnace shell of the blast furnace, water in the hearth casting material can be discharged to the maximum extent after water is collected, the furnace drying time is shortened, and the like, so that the problems of three sets of overflowed water in a tuyere, iron notch splashing, even direct water coming from an iron notch and the like caused by incomplete drying of the water in the casting material after the blast furnace is opened are avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a water collecting and draining method after integral casting of a blast furnace hearth according to an embodiment;
FIG. 2 is a schematic view showing the position of a drain hole in the height direction of a water collecting and draining method after the integral casting of a blast furnace hearth according to an embodiment;
FIG. 3 is a schematic circumferential position diagram of a drain hole of a water collecting and draining method after integral casting of a blast furnace hearth according to an embodiment;
fig. 4 is a schematic structural diagram of a drain hole of a water collecting and draining method after integral casting of a blast furnace hearth according to an embodiment.
The reference numerals are explained below: 1. a furnace shell; 2. a stave cooler; 3. a filling layer; 4. a drain hole; 5. a drainage tube; 6. a drainage control valve; 7. a quick coupling; 8. a header pipe; 9. a water collecting hopper; 10. a measurement control valve; 11. Measuring a pipeline; 12. a flow meter; 13. residual iron eyes; 14. an outer bore; 15. an inner bore.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. 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 application.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present application.
The terms "first", "second" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", "third" may explicitly or implicitly include one or more of the features. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "communicate", "mount", "connect", and the like are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.
Please refer to fig. 1.
Fig. 1 is a schematic structural diagram of a water collecting and draining method after integral casting of a blast furnace hearth according to an embodiment of the present application, and as shown in the figure, the method includes the following steps:
1) Determining the position and the number of the drain holes 4 according to the position and the number of the cooling walls 2 of the blast furnace;
referring to fig. 2 and fig. 3, in the implementation process of this embodiment, the method for determining the positions and the number of the drainage holes 4 in step 1) includes: the total number of the holes is determined according to the number of the cooling walls 2 at the hearth part of the blast furnace and the principle that one drain hole 4 is formed in 7-8 cooling walls 2, the circumferential position of the holes is selected between the two cooling walls 2, the horizontal position is selected to be 1200mm below the elevation of the residual iron eye 13 of the blast furnace, and the drain holes 4 are uniformly distributed.
2) Drilling a drain hole 4 on the blast furnace;
referring to fig. 4, in the embodiment of the present invention, the method for drilling the drain hole 4 in step 2) includes: an outer hole 14 with the diameter of 50mm is drilled in the outer layer of the blast furnace shell 1, a filling layer 3 of the blast furnace shell 1 is arranged in an inner hole 15 communicated with the outer hole 14, and the depth of the inner hole 15 is larger than the cold surface of the blast furnace cooling wall 2.
3) Fixing a drainage tube 5 on a drainage hole 4, arranging a drainage control valve 6 at one end of the drainage tube 5 far away from the blast furnace, connecting the drainage control valve 6 with a water collecting hopper 9 through a collecting pipe 8, and igniting the collecting pipe 8 entering the inlet of the water collecting hopper 9 by using coal gas fire;
4) A liquid level display is arranged in the water collecting hopper 9, the water collecting hopper 9 is led to a drainage ditch through a measuring pipeline 11, a measuring control valve 10 is arranged in the measuring pipeline 11, and a flowmeter 12 is additionally arranged;
5) After the oven starts to work, the drainage control valve 6 is opened, the measurement control valve 10 is selectively opened according to the liquid level condition in the water collecting hopper 9 to discharge water to a drainage ditch, and the water discharge is recorded through the flowmeter 12; and after the work of the oven is finished, intermittently opening the drainage control valve 6, and closing the drainage control valve 6 and sealing the drainage holes 4 in a grouting manner when the total drainage quantity is close to the total water content of the castable or each drainage pipe almost does not drain any more.
In this embodiment, the fixing method of the drainage tube 5 in the step 3) is: the draft tube 5 is inserted into the outer hole 14 such that the front end of the draft tube 5 is flush with the inner side of the furnace shell 1, and the draft tube 5 is welded to the furnace shell 1.
In the embodiment, the flow-guiding valve in the step 3) is an electric control valve, and the electric control valve is connected with a control series of the blast furnace.
In the embodiment, the drainage valve in the step 3) is connected with the drainage tube 5 through the quick connector 7.
In this embodiment, the liquid level display in step 4) is connected to the control system of the blast furnace, and the staff can observe the liquid level condition in the water collecting hopper 9 through the display device in the blast furnace workshop.
In the present embodiment, the measurement control valve 10 in step 4) is an electric control valve.
In this embodiment, the measurement control valve 10 and the flow meter 12 in step 4) are connected to the control system of the blast furnace.
In the embodiment, the period of intermittently opening the drainage control valve 6 after the oven is finished in the step 5) is 2 to 4 hours.
According to the technical scheme, the method has at least the following advantages and positive effects:
according to the water collecting and draining method after the blast furnace hearth is integrally cast, the draft tube is arranged through the furnace shell of the blast furnace, water in the hearth casting material can be drained to the maximum extent after water is collected, the furnace drying time is shortened, and the like, so that the problems that three sets of air ports overflow, iron notch splashing and even direct water coming from the iron notch due to incomplete drying of the water in the casting material after the blast furnace is started are solved.
In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A water collecting and draining method after integral casting of a blast furnace hearth is characterized by comprising the following steps:
1) Determining the positions and the number of the drain holes according to the positions and the number of the cooling walls of the blast furnace;
2) Drilling a drain hole on the blast furnace;
3) Fixing a drainage tube on a drainage hole, arranging a drainage control valve at one end of the drainage tube far away from the blast furnace, connecting the drainage control valve with a water collecting hopper through a collecting pipe, and igniting the collecting pipe entering the inlet of the water collecting hopper by using coal gas fire;
4) A liquid level display is arranged in the water collecting hopper, the water collecting hopper is led to the drainage ditch through a measuring pipeline, a measuring control valve is arranged in the measuring pipeline, and a flowmeter is additionally arranged;
5) Opening a drainage control valve after the oven starts to work, selectively opening a measurement control valve according to the liquid level condition in the water collecting hopper to discharge water to a drainage ditch, and recording the water discharge amount through a flowmeter; and after the work of the oven is finished, intermittently opening the drainage control valve, and closing the drainage control valve and sealing the drainage holes in a grouting manner when the total drainage quantity is close to the total water content of the castable or each drainage pipe almost does not drain any more.
2. The method for draining the collected water after the integral casting of the blast furnace hearth according to claim 1, wherein the method for determining the positions and the number of the drainage holes in the step 1) comprises the following steps: the total number of the holes is determined according to the number of the cooling walls at the hearth part of the blast furnace and the principle that 7-8 cooling walls are provided with a drain hole, the circumferential position of the holes is selected between the two cooling walls, the horizontal position is selected to be 1200mm below the level of the residual iron eye of the blast furnace, and the drain holes are uniformly distributed.
3. The method for draining the collected water after the integral casting of the blast furnace hearth according to claim 1, wherein the method for drilling the drain hole in the step 2) comprises the following steps: an outer hole with the diameter of 50mm is drilled in the outer layer of the blast furnace shell, a filling layer of the blast furnace shell is arranged in an inner hole communicated with the outer hole, and the depth of the inner hole is higher than the cold surface of the cooling wall of the blast furnace.
4. The water collecting and draining method after the integral casting of the blast furnace hearth according to claim 3, wherein the fixing method of the draft tube in the step 3) is as follows: and inserting the drainage tube into the outer hole, wherein the front end of the drainage tube is flush with the inner side of the furnace shell, and welding the drainage tube on the furnace shell.
5. The method for draining the collected water after the integral casting of the blast furnace hearth according to the claim 3, wherein the flow-guiding valve in the step 3) is an electric control valve which is connected with a control series of the blast furnace.
6. The method for collecting and draining the water after the integral casting of the blast furnace hearth according to claim 1, wherein the drainage valve in the step 3) is connected with the drainage pipe through a quick connector.
7. The method for draining the water collected after the integral casting of the hearth of the blast furnace as claimed in claim 1, wherein the liquid level display in step 4) is connected with a control system of the blast furnace, and a worker can observe the liquid level condition in the water collecting hopper through a display device in a workshop of the blast furnace.
8. The method for draining collected water after integral casting of the blast furnace hearth according to claim 1, wherein the measurement control valve in the step 4) is an electric control valve.
9. The method for draining collected water after integral casting of the blast furnace hearth according to claim 1, wherein the measurement control valve and the flow meter in the step 4) are connected with a control system of the blast furnace.
10. The method for draining the collected water after the integral casting of the blast furnace hearth according to claim 1, wherein the period of intermittently opening the drainage control valve after the furnace baking in the step 5) is finished is 2 to 4 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211033559.5A CN115449575A (en) | 2022-08-26 | 2022-08-26 | Water collecting and draining method after integral casting of blast furnace hearth |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211033559.5A CN115449575A (en) | 2022-08-26 | 2022-08-26 | Water collecting and draining method after integral casting of blast furnace hearth |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1276122A (en) * | 1969-08-01 | 1972-06-01 | Voest Ag | Improvements in or relating to a metallurgical converter having a water cooling arrangement |
| CN107805678A (en) * | 2017-11-23 | 2018-03-16 | 中冶赛迪工程技术股份有限公司 | A kind of drainage system for discharging State of Blast Furnace internal water accumulation |
| CN109735672A (en) * | 2019-03-15 | 2019-05-10 | 中冶赛迪工程技术股份有限公司 | A kind of blast furnace crucibe catchments water discharge method and device |
| CN209508302U (en) * | 2019-01-23 | 2019-10-18 | 新疆八一钢铁股份有限公司 | Iron-smelting furnace carbon brick protective device |
| CN111560487A (en) * | 2020-06-03 | 2020-08-21 | 北京首钢股份有限公司 | Treatment device and method for molten iron splashing of blast furnace taphole channel |
-
2022
- 2022-08-26 CN CN202211033559.5A patent/CN115449575A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1276122A (en) * | 1969-08-01 | 1972-06-01 | Voest Ag | Improvements in or relating to a metallurgical converter having a water cooling arrangement |
| CN107805678A (en) * | 2017-11-23 | 2018-03-16 | 中冶赛迪工程技术股份有限公司 | A kind of drainage system for discharging State of Blast Furnace internal water accumulation |
| CN209508302U (en) * | 2019-01-23 | 2019-10-18 | 新疆八一钢铁股份有限公司 | Iron-smelting furnace carbon brick protective device |
| CN109735672A (en) * | 2019-03-15 | 2019-05-10 | 中冶赛迪工程技术股份有限公司 | A kind of blast furnace crucibe catchments water discharge method and device |
| CN111560487A (en) * | 2020-06-03 | 2020-08-21 | 北京首钢股份有限公司 | Treatment device and method for molten iron splashing of blast furnace taphole channel |
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