CN109022648B - Method for controlling furnace top temperature - Google Patents
Method for controlling furnace top temperature Download PDFInfo
- Publication number
- CN109022648B CN109022648B CN201810920876.6A CN201810920876A CN109022648B CN 109022648 B CN109022648 B CN 109022648B CN 201810920876 A CN201810920876 A CN 201810920876A CN 109022648 B CN109022648 B CN 109022648B
- Authority
- CN
- China
- Prior art keywords
- furnace
- controlling
- stockline
- temperature
- furnace top
- 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.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/006—Automatically controlling the process
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Manufacture Of Iron (AREA)
Abstract
The invention belongs to the field of blast furnace smelting, and particularly relates to a method for controlling the temperature of a furnace top. Specifically, the method for controlling the temperature of the furnace top comprises the following steps: (1) lowering the stockline before damping down and reducing wind, controlling the stockline to be more than 3.5m, intensively driving the stockline to the level of a normal stockline after reducing wind, and controlling the stockline to be 1.2-1.5m when damping down; (2) after damping down, the furnace top is ignited after the purging gas is qualified; (3) charging into furnace burden; (4) and (4) filling the cover fabric, and adjusting the distribution of the cover fabric on the fabric surface. The invention meets the requirements of the furnace top equipment on gas concentration and furnace top temperature during maintenance of the furnace top equipment by adjusting the charging mode of the furnace charge in the damping down process and controlling the material pressing after damping down.
Description
Technical Field
The invention belongs to the field of blast furnace smelting, and particularly relates to a method for controlling the temperature of a furnace top.
Background
The blast furnace top ring plate is formed by welding a series of unhookings on the inner surface of a furnace shell at the top end of a blast furnace body and coating a layer of refractory material between the unhookings. Under normal production conditions, the temperature of blast furnace top gas is usually more than 150 ℃, the maximum working temperature born by the furnace top airtight box is lower than 150 ℃, and the high-temperature gas can be effectively isolated from the furnace top airtight box by the refractory material of the blast furnace top ring plate, so that the normal work of the furnace top airtight box is ensured.
Because the annular plate of the furnace top works in the high-temperature and high-flow-rate gas environment for a long time, the fire-resistant layer of the annular plate of the furnace top is eroded and washed by the high-temperature gas and gradually disappears, so that the temperature of a furnace shell at the top end of the furnace top is rapidly increased, the working temperature of an airtight box of the furnace top is gradually increased, and the normal work of the airtight box of the furnace top is influenced. Therefore, it is necessary to regularly spray the blast furnace top ring plate with a refractory coating.
When the blast furnace top ring plate is sprayed after damping down, an operation platform needs to be lapped from a top manhole to the inside of the blast furnace, an operator wears a thermal insulation suit to enter the operation platform for spraying, the operation time needs 12-16 hours, and the temperature of the furnace top is required to be controlled below 100 ℃ at the stage. Meanwhile, after damping down, the furnace top needs to be ignited, the coal gas in the furnace is consumed, and the concentration of the coal gas in the furnace is ensured to be within a safe range.
After the blast furnace is stopped, because the furnace burden still generates chemical action, the blast furnace gas can be formed, the concentration of the gas in the blast furnace is still large, and under the normal condition, the operation of furnace top ignition is needed. When the blast furnace gas rises from the lower part of the furnace, the heat also moves upwards, if the rising trend of the blast furnace gas is not controlled, the temperature of the space at the top of the furnace can reach more than 150 ℃ in a short time, and the spraying operators can not enter the furnace for operation under the gas concentration and the temperature in the furnace.
It is technically difficult to control the furnace top temperature to ensure the above-mentioned working time, and therefore, it is necessary to study a method for controlling the furnace top temperature.
Disclosure of Invention
In order to solve the technical problem, the invention provides a method for controlling the temperature of the furnace top.
Specifically, the invention provides a method for controlling the temperature of a furnace top, which comprises the following steps:
(1) lowering the stockline before damping down and reducing wind, controlling the stockline to be more than 3.5m, intensively driving the stockline to the level of a normal stockline after reducing wind, and controlling the stockline to be 1.2-1.5m when damping down;
(2) after damping down, the furnace top is ignited after the purging gas is qualified;
(3) charging into furnace burden;
(4) and (4) filling the cover fabric, and adjusting the distribution of the cover fabric on the fabric surface.
In the method for controlling the furnace top temperature, in the step (1), the stockline is lowered 1 hour before the damping down and the wind reducing.
In the above method for controlling the furnace top temperature, in the step (1), the time control node of the concentrated material-driving line is: the charging time of the first batch is controlled to be 10-12 min; the charging time of the second batch is controlled to be 15-20 min; the charging time of the third batch is controlled to be 20-25 min.
In the method for controlling the furnace top temperature, in the step (1), the furnace top temperature is controlled to be less than or equal to 150 ℃ before damping down and reducing, and the furnace top temperature is controlled to be 110 +/-10 ℃ during damping down and reducing.
In the method for controlling the furnace top temperature, in the step (3), 3 batches of furnace materials with the same weight as the damping-down material are charged.
In the method for controlling the furnace top temperature, in the step (3), the depth of the charging material front stockline is 3.5-4.5 m.
In the above method for controlling the temperature of the furnace top, in the step (3), the distance between the blanking point of the furnace burden at the inner edge of the furnace and the furnace wall is 350-450 mm.
In the method for controlling the furnace top temperature, the cover material is blast furnace granulated slag.
In the step (4), two batches of cover materials are loaded, wherein the first batch of cover materials are mainly distributed from the inner edge of the furnace to the middle ring belt area in the furnace, and the second batch of cover materials are intensively distributed from the middle ring belt in the furnace to the central area in the furnace.
In the method for controlling the furnace top temperature, the thickness of the cover material in the furnace is 300-350 mm.
The invention meets the requirements of the furnace top equipment on gas concentration and furnace top temperature during maintenance of the furnace top equipment by adjusting the charging mode of the furnace charge in the damping down process and controlling the material pressing step after damping down. Specifically, the technical scheme of the invention has the following beneficial effects:
1. the invention can effectively control the rising rate of the blast furnace top temperature and can meet the requirement of 12-16 hours for the spraying operation of the ring plate at the furnace top;
2. after the method is implemented, the blast furnace air supply recovery is not influenced, the air supply recovery time is 4-6 hours, and the method is not different from the normal maintenance operation air supply recovery;
3. the invention can also be applied to other blast furnace top maintenance operations with requirements on gas and temperature, and provides safety and time guarantee for the maintenance of the blast furnace;
4. the invention can solve the problem that the gas-tight box is damaged due to overhigh temperature of the furnace top after the furnace top is ignited in the daily maintenance operation process.
Detailed Description
The present invention will be described in detail with reference to the following embodiments in order to fully understand the objects, features and effects of the invention. The process of the present invention employs conventional methods or apparatus in the art, except as described below. The following noun terms have meanings commonly understood by those skilled in the art unless otherwise specified.
The method for controlling the temperature of the furnace top is suitable for the furnace volume of more than 4000m3The blast furnace of (1).
Specifically, the method for controlling the temperature of the furnace top provided by the invention comprises the following steps:
(1) and lowering the stockline before damping down and reducing the wind, controlling the stockline to be more than 3.5m, intensively driving the stockline to the level of a normal stockline after reducing the wind, and controlling the stockline to be 1.2-1.5m when damping down.
For a bell-less blast furnace, the stockline depth refers to the position 0 of the upper edge of the throat steel brick, and the vertical distance from the position to the charge level is the stockline depth, wherein the normal stockline level is 1.2-1.5 m.
Wherein, when the material line is controlled in the range of 1.2-1.5m, the temperature of the furnace top can reach 100-120 ℃, which is beneficial to the ignition of the furnace top.
The stockline is controlled to be more than 3.5m before damping down and reducing wind, and the stockline is intensively driven to the level of the normal stockline in the wind reducing stage, so that the contact time of the newly charged furnace burden and coal gas is reduced, the time for preheating the newly charged furnace burden is prolonged, and the rising speed of the temperature of the furnace top is favorably controlled.
In some preferred embodiments, the present invention performs the stockline descent 1 hour before the damping down.
Wherein, the time control node of the concentrated material driving line after wind reduction is as follows: the charging time of the first batch is controlled to be 10-12 min; the charging time of the second batch is controlled to be 15-20 min; the charging time of the third batch is controlled to be 20-25 min.
After the wind is reduced, the physical and chemical reactions in the furnace are correspondingly reduced, the descending speed of the furnace burden is reduced, and the time control node is obtained by corresponding wind after the wind is reducedAnd calculating the descending speed of the furnace charge according to the level of the quantity, and further determining the control charging time. For example: air volume 6000m3At the time of min, the descending speed of the furnace charge is 5.98m/h, and the air quantity is 4000m3At the time of/min, the descending speed of the charge is 3.48 m/h.
In some preferred embodiments, the top temperature of the blast furnace is controlled to be less than or equal to 150 ℃ before damping down and is controlled to be 110 +/-10 ℃ when damping down and damping down.
Wherein the furnace top temperature is less than or equal to 150 ℃ so as to protect the furnace top airtight box, and the working temperature of the furnace top airtight box is required to be lower than 150 ℃. The temperature of the furnace top is controlled to be 100-120 ℃ after the damping down, which is beneficial to the evaporation of the water content of the furnace charge and reduces the difficulty of firing on the material surface of the furnace top due to the large water content of the furnace charge when the furnace top is ignited.
(2) After damping down, the furnace top is ignited after the purging gas is qualified;
after damping down, the furnace top is ignited to effectively control the gas concentration within a safe range.
(3) Charging into furnace burden;
after the ignition of the furnace top is finished, the depth of the stockline is 3.5-4.5 m. Then, 3 batches of charge materials having the same weight as the damping-down charge were charged, thereby continuously suppressing the rise in the furnace top temperature. The distribution angle is adjusted according to the depth of the burden line, so that the distance between the blanking point of the burden at the inner edge of the furnace and the furnace wall is 350-450 mm.
In the distribution process, when the distance between the blanking point and the furnace wall is calculated to be 350-450mm, only part of the furnace burden slides to the inner edge of the furnace due to the rolling property of the furnace burden, the thickness of the furnace burden at the inner edge of the furnace is thinner, the air permeability is better, the control of edge airflow is facilitated, and the convenience is provided for the damping-down recovery of the blast furnace.
(4) And (4) filling the cover fabric, and adjusting the distribution of the cover fabric on the fabric surface.
Wherein the cover fabric is dry blast furnace granulated slag with heat insulation function.
Preferably, two batches of cover fabric are loaded, wherein the first batch of cover fabric is mainly distributed from the inner edge of the furnace to the middle ring belt area in the furnace, and the second batch of cover fabric is intensively distributed from the middle ring belt in the furnace to the central area in the furnace.
According to the invention, by adjusting the distribution of the cover material on the material surface, a ring of weak fire light is formed in the center of the material surface of the furnace top, and the trend of slow rising speed of the temperature of the furnace top is formed, so that the temperature of the furnace top does not exceed the upper limit value in the working time of an operator, and the condition that the material pressing operation has no adverse effect on the blast furnace air supply recovery process is ensured.
In some preferred embodiments, the thickness of the lid material within the furnace is 300 and 350 mm.
According to the characteristics of the selected cover fabric and the amount of the furnace top gas after damping down, the thickness of the cover fabric can be calculated to be 300-350mm, the heat brought by the furnace top gas can be absorbed by the cover fabric, meanwhile, the thickness of the 300-350mm cover fabric does not influence the air permeability of furnace charge, and the distribution of the gas flow in the furnace is not influenced after air supply.
In some preferred embodiments, the method of controlling the temperature of a furnace roof of the present invention comprises the steps of:
1) adjusting charging mode of furnace charge before damping down
Starting to lower the stockline to 3.5m 1 hour before damping down and reducing the wind, controlling the temperature of the furnace top within 150 ℃, concentrating the stockline after reducing the wind, controlling the stockline to 1.5m when damping down, and maintaining the top temperature at 110 +/-10 ℃.
Wherein, the time control node of the concentrated material driving line after wind reduction is as follows: the charging time of the first batch is controlled to be 10-12 min; the charging time of the second batch is controlled to be 15-20 min; the charging time of the third batch is controlled to be 20-25 min.
2) Top gas ignition
After damping down, after the gas purging is qualified, the furnace top tissue is ignited.
3) Pressing control step after damping down
After the ignition of the furnace top is finished, the depth of the stockline is 3.5-4.5 m. 3 batches of furnace burden are organized and loaded, the batch weight of the furnace burden is consistent with that of the damping down material, and the distribution angle is adjusted according to the depth of a burden line, so that the distance between a blanking point of the furnace burden at the edge in the furnace and a furnace wall is ensured to be within the range of 350-450 mm.
4) Filling cover fabric
a ingredients of the cover fabric
The ingredients of the cover fabric are as follows: and (3) blast furnace granulated slag.
Preparation of b-lid Fabric
One week before the rest, the blast furnace slag (60-80t) is transported to a drying platform, and the organization personnel turn over the slag to completely dry the slag. And (4) transporting the dried slag to a receiving groove below the groove for standby one day before the damping down.
c-lid pack loading mode
2 batches of covering materials are organized in total, each batch of covering materials is 30t, the first batch of granulated slag is mainly distributed from the edge of the furnace to the middle ring belt area in the furnace, and the second batch of granulated slag is intensively distributed from the middle ring belt in the furnace to the central area in the furnace. The thickness of the cover fabric in the furnace is kept to be 300-350 mm.
Hereinafter, a detailed description will be given of an embodiment of the present invention by taking a tai-steel No. 5 blast furnace as an example. The specific implementation steps are as follows:
1. 4: start lowering line 40, 5: 40 stock line down to 3.5 m. Wind reduction (5: 40) start catch-up line, 6: the stockline is 1.5m when the damping down is carried out at 40 ℃, and the top temperature is 115 ℃.
Wherein, concentrate behind the wind-reduction and catch up with the stockline process and do: the charging time of the first batch is controlled to be 10 min; the charging time of the second batch is controlled at 18 min; the third batch was controlled at 25 min.
2. And carrying out damping down operation.
3. After blowing-down blowing gas is qualified, 9: 30 stovetop fires, at which point the stockline height is approximately 3.5 m.
4. 3 batches of materials are pressed after the furnace top is ignited (10: 00). The specific pattern of the material pressing and distributing is shown in table 1.
TABLE 1 distribution mode of furnace roof ignited material pressing
| Batch 1 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | |
| Charging angle (degree) | 37 | 35 | 33 | 31 | 29 | 27 | 25 | 23 | 20 | |
| C (Ring) | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | |
| O (Ring) | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | ||
| Batch 2 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | |
| Charging angle (degree) | 38 | 36 | 34 | 32 | 30 | 28 | 26 | 23 | 20 | |
| C (Ring) | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | |
| O (Ring) | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | ||
| Batch 3 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| Charging angle (degree) | 39 | 37 | 35 | 33 | 31 | 29 | 27 | 25 | 23 | 20 |
| C (Ring) | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| O (Ring) | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
Wherein the symbol "C" represents coke and the symbol "O" represents ore.
In table 1, the cokes in the batch 1 were distributed with 2 laps of coke at the corresponding charging angles of 37 °, 35 °, 33 °, 31 °, 29 °, 27 °, 25 °, 23 °, respectively, and the middlings of the batch 1 were distributed with 2 laps of ore at the corresponding charging angles of 37 °, 35 °, 33 °, 31 °, 29 °, 27 °, 25 °, 23 °, 20 °, respectively. The batch 2 of medium coke was distributed with 2 cycles of coke at the charging angle in table 1, and the batch 2 of medium ore was distributed with 2 cycles of ore at the charging angle in table 1. The middle coke of batch 3 was laid down 2 coke turns at the charging angle in table 1, respectively, and the middle ore of batch 3 was laid down 2 ore turns at the charging angle in table 1, respectively.
After the materials are pressed according to the material pressing and distributing mode shown in the table 1, the distance between the blanking point of the furnace burden at the inner edge of the furnace and the furnace wall is 410 mm.
5. Furnace top gland fabric
A total of 2 batches of dried capstock material (11:20) were organised, 30t for each batch. The cloth pattern of each batch of cover fabric is shown in table 2.
TABLE 2 cloth mode of cover fabric
| Batch 1 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | |
| Charging angle (degree) | 37 | 35 | 33 | 31 | 29 | 27 | 25 | 23 | 20 | |
| Ring of a toy | 3 | 3 | 3 | 2 | 2 | 2 | 2 | |||
| Batch 2 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| Charging angle (degree) | 38 | 36 | 34 | 32 | 30 | 28 | 26 | 23 | 20 | 16 |
| Ring of a toy | 2 | 2 | 2 | 2 | 2 | 2 |
In table 2, the number of turns of the 1 st batch of cover fabric under the corresponding filling angles of 37 °, 35 °, 33 °, 31 °, 29 °, 27 °, and 25 ° is 3, 2, and 2, respectively. The number of turns of the second batch of cover fabric under the corresponding filling angles of 30 degrees, 28 degrees, 26 degrees, 23 degrees, 20 degrees and 16 degrees is respectively 2, 2 and 2.
The cloth was carried out according to the cover fabric cloth mode of table 2, the thickness of the cover fabric in the furnace was 320 mm. The first batch of cover fabric is mainly distributed from the inner edge of the furnace to the middle ring belt area in the furnace, and the second batch of cover fabric is intensively distributed from the middle ring belt in the furnace to the central area in the furnace.
After the cover material is pressed on the furnace top, the concentration of the gas in the furnace is lower than 80ppm, and maintenance personnel can enter the furnace to work by wearing the positive pressure respirator. The temperature in the furnace is 75 ℃ at the beginning, and after the maintaining time is 16 hours, the temperature in the furnace is slowly increased to 110 ℃, thereby providing powerful guarantee for the annular plate spraying operation.
Therefore, the method successfully meets the requirement of maintaining the furnace top temperature for 16 hours under the condition of meeting the working requirement, and provides sufficient working time for the blast furnace top ring plate spraying operation.
The present invention has been disclosed in the foregoing in terms of preferred embodiments, but it will be understood by those skilled in the art that these embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of the present invention. It should be noted that all changes and substitutions equivalent to those of the embodiments are intended to be included within the scope of the claims of the present invention. Therefore, the protection scope of the present invention should be subject to the scope defined in the claims.
Claims (8)
1. A method of controlling the temperature of a furnace roof, comprising the steps of:
(1) lowering the stockline before damping down and reducing wind, controlling the stockline to be more than 3.5m, intensively driving the stockline to the level of a normal stockline after reducing wind, and controlling the stockline to be 1.2-1.5m when damping down;
(2) after damping down, the furnace top is ignited after the purging gas is qualified;
(3) charging into furnace burden;
(4) loading the cover fabric, and adjusting the distribution of the cover fabric on the fabric surface;
in the step (4), two batches of cover fabrics are loaded, wherein the first batch of cover fabrics are mainly distributed from the inner edge of the furnace to the middle ring belt area in the furnace, and the second batch of cover fabrics are intensively distributed from the middle ring belt in the furnace to the central area in the furnace; the thickness of the cover fabric in the furnace is 300-350 mm.
2. The method of controlling the furnace roof temperature according to claim 1, wherein in the step (1), the stockline lowering is performed 1 hour before the damping-down.
3. The method of controlling the furnace roof temperature according to claim 1, wherein in step (1), the time control nodes of the concentrated material drive line are: the charging time of the first batch is controlled to be 10-12 min; the charging time of the second batch is controlled to be 15-20 min; the charging time of the third batch is controlled to be 20-25 min.
4. The method for controlling the furnace top temperature according to claim 1, wherein in the step (1), the furnace top temperature is controlled to be less than or equal to 150 ℃ before damping down and is controlled to be 110 +/-10 ℃ when damping down and damping down.
5. The method of controlling the roof temperature according to claim 1, wherein said step (3) is carried out by charging 3 batches of the charge materials having the same weight as the damping-down charge.
6. The method of controlling the roof temperature of claim 1, wherein in step (3), the depth of said charge material front line is 3.5-4.5 m.
7. The method for controlling the temperature of a furnace roof as recited in claim 5, wherein in the step (3), the distance from the furnace wall to the dropping point of the burden at the inner edge of the furnace is 350-450 mm.
8. The method of controlling the temperature of a furnace roof as recited in claim 1, wherein said cover material is blast furnace slag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810920876.6A CN109022648B (en) | 2018-08-14 | 2018-08-14 | Method for controlling furnace top temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810920876.6A CN109022648B (en) | 2018-08-14 | 2018-08-14 | Method for controlling furnace top temperature |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109022648A CN109022648A (en) | 2018-12-18 |
| CN109022648B true CN109022648B (en) | 2020-06-26 |
Family
ID=64633987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810920876.6A Active CN109022648B (en) | 2018-08-14 | 2018-08-14 | Method for controlling furnace top temperature |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109022648B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110643761B (en) * | 2019-04-11 | 2021-08-31 | 广东韶钢松山股份有限公司 | Blast furnace top ignition method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS599108A (en) * | 1982-07-07 | 1984-01-18 | Kawasaki Steel Corp | Method for controlling distribution of charge in blast furnace |
| CN101250599A (en) * | 2008-03-12 | 2008-08-27 | 重庆钢铁(集团)有限责任公司 | Blast furnace banking method |
| CN104630400A (en) * | 2015-02-01 | 2015-05-20 | 山西太钢不锈钢股份有限公司 | Method for controlling furnace top temperature of blast furnace through blowing out |
| CN104878141A (en) * | 2015-06-07 | 2015-09-02 | 山西太钢不锈钢股份有限公司 | Blast furnace low pressure exhaust air cut coal gas blowing down method |
| CN106048115A (en) * | 2016-07-27 | 2016-10-26 | 山西太钢不锈钢股份有限公司 | Method for furnace top ignition after damping-down of blast furnace |
-
2018
- 2018-08-14 CN CN201810920876.6A patent/CN109022648B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS599108A (en) * | 1982-07-07 | 1984-01-18 | Kawasaki Steel Corp | Method for controlling distribution of charge in blast furnace |
| CN101250599A (en) * | 2008-03-12 | 2008-08-27 | 重庆钢铁(集团)有限责任公司 | Blast furnace banking method |
| CN104630400A (en) * | 2015-02-01 | 2015-05-20 | 山西太钢不锈钢股份有限公司 | Method for controlling furnace top temperature of blast furnace through blowing out |
| CN104878141A (en) * | 2015-06-07 | 2015-09-02 | 山西太钢不锈钢股份有限公司 | Blast furnace low pressure exhaust air cut coal gas blowing down method |
| CN106048115A (en) * | 2016-07-27 | 2016-10-26 | 山西太钢不锈钢股份有限公司 | Method for furnace top ignition after damping-down of blast furnace |
Non-Patent Citations (1)
| Title |
|---|
| 高温及煤气环境下进入高炉炉内作业实践;赵庆凯;《包钢科技》;20180228;第44卷(第1期);第5.1节 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109022648A (en) | 2018-12-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11643602B2 (en) | Decarbonization of coke ovens, and associated systems and methods | |
| US10106863B2 (en) | Method for operation of blast furnace | |
| EP3222953B1 (en) | Sintering apparatus and sintering method | |
| CN109022648B (en) | Method for controlling furnace top temperature | |
| CN107099638A (en) | It is a kind of to prevent dry method dust converter from opening to be blown off quick-fried control method | |
| KR20170058181A (en) | Raw meterial treatment apparatus and method for raw metrial treatment using the same | |
| JP3845978B2 (en) | Operation method of rotary hearth furnace and rotary hearth furnace | |
| CN108315514A (en) | Blast furnace opening loading method | |
| JP2000226618A (en) | Method for recovering exhaust heat in cooler for sintered ore and cooler for sintered ore | |
| US3681049A (en) | Method of charging electric arc steelmaking furnace | |
| JPS589908A (en) | Preheating method for charge for blast furnace | |
| JP3991525B2 (en) | Reduced blast furnace operation method | |
| JP2019523385A (en) | Bird nest removal device for blast furnace | |
| CN104152678B (en) | A kind of device and technique thereof removing plumbous zinc element in iron ore | |
| KR101749253B1 (en) | Coke drying device for blast furnce bin | |
| CN115261532B (en) | Method for constructing initial airflow of large blast furnace | |
| KR20000014413A (en) | Method for ascending operating degree in mending operation of blast furnace wall | |
| JP4379083B2 (en) | Method for producing semi-reduced agglomerate | |
| KR910008003B1 (en) | Process for reducing the firing time of the furnace gas in the blast furnace | |
| KR101593917B1 (en) | Apparatus for drying wet coke and coke weighting hopper having the same | |
| US2070236A (en) | Method and apparatus for making sulphur dioxide | |
| SU1640173A1 (en) | Process for blast furnace operation | |
| CN105087909B (en) | A kind of tunnel kiln direct reduced anti-oxidation coverture of iron ore and preparation method thereof | |
| AU2021437529A1 (en) | Reduced iron production method and reduced iron production device | |
| CN115109886A (en) | Heat preservation method for long-time shutdown of converter |
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 | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 030003, Shanxi, Taiyuan, pointed lawn area, lawn street, No. 2 Applicant after: Shanxi Taigang Stainless Steel Co.,Ltd. Address before: 030003 Taiyuan science and technology center, Shanxi 2 Applicant before: Shanxi Taigang Stainless Steel Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |