CN106225941A - Vibration paddle type mill measures the device and method of Center Temperature of Coke Cake - Google Patents
Vibration paddle type mill measures the device and method of Center Temperature of Coke Cake Download PDFInfo
- Publication number
- CN106225941A CN106225941A CN201610651677.0A CN201610651677A CN106225941A CN 106225941 A CN106225941 A CN 106225941A CN 201610651677 A CN201610651677 A CN 201610651677A CN 106225941 A CN106225941 A CN 106225941A
- Authority
- CN
- China
- Prior art keywords
- pipe
- sleeve pipe
- vibration hammer
- coalingging
- coke
- 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.)
- Granted
Links
- 239000000571 coke Substances 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000005259 measurement Methods 0.000 claims abstract description 33
- 238000010000 carbonizing Methods 0.000 claims abstract description 21
- 239000002817 coal dust Substances 0.000 claims abstract description 14
- 239000002828 fuel tank Substances 0.000 claims abstract description 6
- 239000003245 coal Substances 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 2
- 238000004939 coking Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 241001631457 Cannula Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process 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
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000002627 tracheal intubation Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D41/00—Regeneration of the filtering material or filter elements outside the filter for liquid or gaseous fluids
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Coke Industry (AREA)
Abstract
The invention discloses a kind of paddle type mill that vibrates and measure the device of Center Temperature of Coke Cake, including support, sleeve pipe, the measurement pipe of band tip, vibration hammer；Propping up and be placed on above the hole of coalingging of furnace roof, sleeve pipe is placed in support；The one end measuring pipe is connected with vibration hammer, and the other end of measurement pipe inserts in carbonizing chamber coal dust after sequentially passing through sleeve pipe, hole of coalingging；It is respectively provided with temperature sensor measuring the front portion of pipe, middle part and rear portion；Vibration hammer includes taping block, oil cylinder, controller, and taping block is connected with measurement pipe, the piston of oil cylinder respectively；The rod chamber of oil cylinder and rodless cavity are connected with fuel tank by pipeline, reversal valve, oil pump, and controller controls reversal valve and operation of oil pump, thus controls pistons work, it is achieved measure the rise and fall of pipe.The present invention also provides for a kind of paddle type mill that vibrates and measures Center Temperature of Coke Cake.These apparatus and method can accurately measure Center Temperature of Coke Cake.
Description
Technical field
The present invention relates to field of temperature measurement, be specifically related to a kind of vibrate paddle type mill measure Center Temperature of Coke Cake device and
Method.
Background technology
Top dress coking by coke oven is the major way that China produces blast furnace ironmaking coke.Coke oven heating management makes coke oven equilibrium raw
Producing, and reach stable yields, high-quality, low consumption, longevity, high yield, the management of coke oven temperature produces all the time through coking, and it is for fall
There are decisive significance in low heat dissipation, raising coke quality, prolongation coke oven life-span.
Center Temperature of Coke Cake is the synthesis result of coke oven Transverse Heated and longitudinally heating, is to ensure that coke oven is laterally, the most all
Even heating, reduce heat consumption, improve that one of coke quality important and data intuitively；Center Temperature of Coke Cake is also that coke is ripe
Important indicator, coke oven standard temperature formulate foundation.When change types of gas heated, change coking time, change coal and
It is required for during proportioning measuring Center Temperature of Coke Cake, in order to adjust heating cycle in time.
Traditional method measuring Center Temperature of Coke Cake is intubation, i.e. vertically inserts by pusher side, coke side hole of coalingging at furnace roof
Entering and measure pipe, measurement pipe is one end open, the seamless steel pipe of the φ 50m that one end tip is closed, then thermocouple inserts measurement pipe
In, to measure 3, the upper, middle and lower temperature of charge of coke, represent Center Temperature of Coke Cake with the meansigma methods of 3 temperature.The biggest volume
Coke furnace carbonization chamber height is generally 6m ~ 7.63m, measures length of tube and is generally 6.5m ~ 8.5m, and the width of coke furnace carbonization chamber is general
For 0.45m ~ 0.55m, therefore when there is little deviation vertical measurement pipe upper end, bottom point for measuring temperature deviation is bigger, it will cause surveying
Temperature is inaccurate, it is also possible to scratch carbonizing chamber furnace wall.Along with the progress of the technology such as the moisture reduction of coking coal, granularity improvement, load
The bulk density of carbonizing chamber coking coal is greatly improved, and causes manually intubating and is difficult to be inserted to carbonizing chamber coal dust bottom, makes measurement apparatus only
The charge of coke temperature at top and middle part can be measured, have impact on the accuracy of measurement, coke oven thermal technology management and coke quality are controlled
Unfavorable.
Summary of the invention
It is an object of the invention to provide a kind of paddle type mill that vibrates and measure the device and method of Center Temperature of Coke Cake, this device
Center Temperature of Coke Cake can be accurately measured with method.
The technical solution adopted in the present invention is:
A kind of paddle type mill that vibrates measures the device of Center Temperature of Coke Cake, including support, sleeve pipe, the measurement pipe of band tip, vibration hammer,
Above described the hole of coalingging being placed on furnace roof, described sleeve pipe is placed in support, makes sleeve pipe remain with horizontal plane and hangs down
Directly；One end of described measurement pipe is connected with vibration hammer, and the other end measuring pipe sequentially passes through insertion carbonizing chamber behind sleeve pipe, hole of coalingging
In coal dust；It is respectively provided with temperature sensor measuring the front portion of pipe, middle part and rear portion；
Described vibration hammer includes taping block, oil cylinder, controller, and taping block is connected with measurement pipe, the piston of oil cylinder respectively；Oil cylinder
Rod chamber and rodless cavity are connected with fuel tank by pipeline, reversal valve, oil pump, and controller controls reversal valve and operation of oil pump, thus
Control pistons work, it is achieved measure the rise and fall of pipe.
By such scheme, described oil pump, reversal valve, controller are placed on charging car, and charging car is placed in by hole of coalingging；Described
Oil cylinder is fixing with charging car to be connected, to facilitate control and the movement of vibration hammer.
By such scheme, described support includes rack body and clamping device；Clamping device is placed in inside rack body, uses
In sleeve pipe is clamped, to guarantee the perpendicularity of sleeve pipe.
The present invention also provides for a kind of device using above-mentioned vibration paddle type mill to measure Center Temperature of Coke Cake and is measured charge of coke
The method of central temperature, comprises the steps:
Charging car is moved by the hole of coalingging of oven top of coke oven, and be connected fixing to the oil cylinder of vibration hammer and charging car；
In mounting bracket on hole of coalingging, in support, install sleeve pipe, by the clamping device of support, sleeve pipe is clamped, and make sleeve pipe
With horizontal plane；
Measurement pipe is made to be connected with the taping block of vibration hammer；Vibration hammer carries measurement pipe on first, make one end of measurement pipe racks tip be placed in
In sleeve pipe；Unclamp the connection measuring pipe with taping block, make measurement pipe free-falling insert carbonizing chamber coal behind sleeve pipe, hole of coalingging
Powder certain length, it is ensured that measure pipe and be inserted perpendicularly in carbonizing chamber coal dust；
Again vibration hammer is attached with measuring pipe, measures pipe under the effect of vibration hammer, insert the coal dust of carbonizing chamber bottom
In；
By being arranged on the temperature sensor measuring the front portion of pipe, middle part and rear portion, 3, the upper, middle and lower temperature of charge of coke is carried out
Measure, using the meansigma methods of 3 temperature as Center Temperature of Coke Cake.
The beneficial effect comprise that:
By arranging vibration hammer, make in measurement pipe energy coal dust accurate, insertion carbonizing chamber bottom easily, to solve carbonizing chamber
Coking coal bulk density increases the problem causing using traditional cannulas method measurement Center Temperature of Coke Cake difficulty big, improves and measures accurately
Property；
It is outside equipped with sleeve pipe, it is ensured that measure the pipe perpendicularity when intubating, it is ensured that the accuracy of measurement result measuring pipe, and
Can effectively prevent from measuring pipe to scratch, scratch carbonizing chamber furnace wall
These apparatus and method can accurately measure Center Temperature of Coke Cake.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the structural representation of the embodiment of the present invention；
Fig. 2 is the attachment structure schematic diagram measuring tube body with detachable type drill.
1, furnace roof brick, 2, rack body, 3, clamping device, 4, sleeve pipe, 5, measure pipe, 5-1, measures tube body, 5-2, can
Dismountable drill bit, 6, taping block, 7, rod chamber, 8, piston, 9, rodless cavity, 10, oil cylinder, 11, pipeline, 12, reversal valve, 13, dress
Coal car, 14, fuel tank, 15, oil pump, 17, hole of coalingging, 18, seam, the 19, first mounting box, the 20, second mounting box, the 21, the 3rd peace
Mounted box.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, right
The present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, not
For limiting the present invention.
See Fig. 1, a kind of paddle type mill that vibrates measures the device of Center Temperature of Coke Cake, including support, sleeve pipe 4, band tip
Measure pipe 5, vibration hammer；
Support includes rack body 2 and clamping device 3, is placed in above the hole 17 of coalingging of furnace roof；Clamping device 3 is placed in rack body
Inside 2, sleeve pipe 4 is placed in rack body 2, and sleeve pipe 4 is clamped by clamping device 3, to guarantee the perpendicularity of sleeve pipe 4；Measure pipe 5
One end is connected with vibration hammer, and the other end of measurement pipe 5 inserts in carbonizing chamber coal dust after sequentially passing through sleeve pipe 4, hole 17 of coalingging；Surveying
The front portion of buret 5, middle part and rear portion are respectively provided with temperature sensor；
Vibration hammer includes taping block 6, oil cylinder 10, controller, charging car 13, taping block 6 respectively with measure pipe 5, the work of oil cylinder 10
Plug 8 connection；Oil, 10 fixing with charging car 13 are connected, the rod chamber 7 of oil cylinder 10 and rodless cavity 9 pass through pipeline 11, reversal valve 12,
Oil pump 15 is connected with fuel tank 14, and oil pump 15, reversal valve 12, controller are placed on charging car 13, and charging car 13 is placed in hole 17 of coalingging
Other；Controller controls reversal valve 12 and oil pump 15 works, thus controls piston 8 action, it is achieved measure the rise and fall of pipe 5.
Such as Fig. 2, measure pipe 5 and include measuring tube body 5-1 and being positioned at the detachable type drill 5-measuring tube body 5-1 front end
2, detachable type drill 5-2 are threaded connection with measuring tube body 5-1；Detachable type drill 5-2 installs the first installation
Box 19, installs the second mounting box 20 at the middle part measuring tube body 5-1, installs the 3rd installation on the top measuring tube body 5-1
Box 21, installs temperature sensor in each mounting box respectively, accurately to measure 3, the upper, middle and lower temperature of charge of coke.So that it is right
3, the upper, middle and lower of charge of coke temperature accurately measures, it is to avoid measures the skew of some position, causes temperature survey inaccurate.When
Be positioned at measure the detachable type drill of tube body front end worn or damaged time, only need to change detachable type drill, and without
Changing whole pipe of measuring, reduction is measured the consumption of pipe, thus is decreased measurement cost.Use detachable type drill, to facilitate more
Changing the pointed portion measuring pipe front end, operation is very easy.
In the present invention, measuring pipe is hollow seamless steel pipe.Rack body is splicing structure.The diameter of sleeve pipe is slightly less than coalings
The bell diameter in hole, the i.e. diameter of sleeve pipe are about 80mm；A length of 6.5m ~ the 8.5m of sleeve pipe；Internal surface of sleeve pipe is smooth, and material is not
Rust steel pipe.Temperature sensor is K-type thermocouple, and mounting box is used for fixing thermocouple termination, prevents thermocouple from softening and causes measuring
The generation that point moves down.
A kind of device using above-mentioned vibration paddle type mill to measure Center Temperature of Coke Cake is measured the side of Center Temperature of Coke Cake
Method, comprises the steps:
Charging car is moved by the hole of coalingging of oven top of coke oven, and be connected fixing to the oil cylinder of vibration hammer and charging car, vibration hammer
Also can promote measurement pipe by vertical depression measurement pipe, vibration hammer uses hydraulic braking；Oil in fuel tank is passed through oil pipe by i.e. oil pump
Enter oil cylinder, and change oil circuit by reversal valve, and then make the piston of oil cylinder move up and down, produce mechanical force and pass through taping block
Transmission acts on measurement pipe；
In mounting bracket on hole of coalingging, in support, install sleeve pipe, by the clamping device of support, sleeve pipe is clamped, and make sleeve pipe
With horizontal plane (leaving the sleeve in vertical state)；
Measurement pipe is made to be connected with the taping block of vibration hammer；Survey crew station is on charging car, and vibration hammer carries measurement pipe on first, make survey
One end of buret band tip is placed in sleeve pipe；Unclamp the connection measuring pipe with taping block, make measurement pipe free-falling (freely falling body
Mode) behind sleeve pipe, hole of coalingging, insert carbonizing chamber coal dust certain length, it is ensured that measure pipe and be inserted perpendicularly in carbonizing chamber coal dust；
Generally, now, measure pipe and can be inserted into coal dust about 2m, be 6.5m ~ 8.5m owing to measuring length of tube, every line in carbonizing chamber
Being 0.5m ~ 0.8m with the outage at carbonizing chamber top, furnace roof brick thickness is about 1.2m, the most now stretches out the measurement above hole of coalingging
Length of tube is about 2.8m ~ 4.5m；
Mobile coal car, makes vibration hammer in place, is again attached with measuring pipe by vibration hammer, Vibration on Start-up hammering device, measures
Pipe inserts in the coal dust of carbonizing chamber bottom under the effect of vibration hammer；When measuring pipe and declining 2m ~ 2.5m, measuring pipe can be vertical
Erect；Now, unclamp vibration hammer with measure pipe connection, above carry taping block, remove support, sleeve pipe, be again coupled to vibration hammer with
Measuring pipe, vibration hammer continues to vibrate hammering and measures pipe, until measuring pipe to arrive appointment position, stops vibration hammering；Unclamp vibration
Hammer and the connection measuring pipe, above carry taping block；
By being arranged on the temperature sensor measuring the front portion of pipe, middle part and rear portion, 3, the upper, middle and lower temperature of charge of coke is carried out
Measure, using the meansigma methods of 3 temperature as Center Temperature of Coke Cake；
Before coke pushing, 1h ~ 2h extracts measurement pipe, measures complete.
The present invention can make blast furnace coke ratio reduce by 0.1%, and by Wuhan Iron and Steel Plant production capacity 16,000,000 tons, coke ratio 290kg/t calculates, then reduces
Coke consumption 1600 × 0.1% × 0.29=4640 ton, by the calculating of 700 yuan/ton of coke, then cost declining 4640 × 700=324.8 ten thousand
Unit.Deduction equipment cost 1,000,000 yuan, then year benefit is 324.8-100=224.8 ten thousand yuan.
It should be appreciated that for those of ordinary skills, can be improved according to the above description or be converted,
And all these modifications and variations all should belong to the protection domain of claims of the present invention.
Claims (4)
1. one kind is vibrated paddle type mill and measures the device of Center Temperature of Coke Cake, it is characterised in that: include support, sleeve pipe, band tip
Measure pipe, vibration hammer；
Above described the hole of coalingging being placed on furnace roof, described sleeve pipe is placed in support, makes sleeve pipe remain with horizontal plane and hangs down
Directly；One end of described measurement pipe is connected with vibration hammer, and the other end measuring pipe sequentially passes through insertion carbonizing chamber behind sleeve pipe, hole of coalingging
In coal dust；It is respectively provided with temperature sensor measuring the front portion of pipe, middle part and rear portion；
Described vibration hammer includes taping block, oil cylinder, controller, and taping block is connected with measurement pipe, the piston of oil cylinder respectively；Oil cylinder
Rod chamber and rodless cavity are connected with fuel tank by pipeline, reversal valve, oil pump, and controller controls reversal valve and operation of oil pump, thus
Control pistons work, it is achieved measure the rise and fall of pipe.
Device the most according to claim 1, it is characterised in that: described oil pump, reversal valve, controller are placed on charging car,
Charging car is placed in by hole of coalingging；Described oil cylinder is fixing with charging car to be connected.
Device the most according to claim 1, it is characterised in that: described support includes rack body and clamping device；Clamping
Device is placed in inside rack body, for being clamped by sleeve pipe.
4. one kind uses the device that in claim 1-3, arbitrary described vibration paddle type mill measures Center Temperature of Coke Cake to be measured
The method of Center Temperature of Coke Cake, it is characterised in that comprise the steps:
Charging car is moved by the hole of coalingging of oven top of coke oven, and be connected fixing to the oil cylinder of vibration hammer and charging car；
In mounting bracket on hole of coalingging, in support, install sleeve pipe, by the clamping device of support, sleeve pipe is clamped, and make sleeve pipe
With horizontal plane；
Measurement pipe is made to be connected with the taping block of vibration hammer；Vibration hammer carries measurement pipe on first, make one end of measurement pipe racks tip be placed in
In sleeve pipe；Unclamp the connection measuring pipe with taping block, make measurement pipe free-falling insert carbonizing chamber coal behind sleeve pipe, hole of coalingging
Powder certain length, it is ensured that measure pipe and be inserted perpendicularly in carbonizing chamber coal dust；
Again vibration hammer is attached with measuring pipe, measures pipe under the effect of vibration hammer, insert the coal dust of carbonizing chamber bottom
In；
By being arranged on the temperature sensor measuring the front portion of pipe, middle part and rear portion, 3, the upper, middle and lower temperature of charge of coke is carried out
Measure, using the meansigma methods of 3 temperature as Center Temperature of Coke Cake.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610651677.0A CN106225941B (en) | 2016-08-10 | 2016-08-10 | Vibrate the device and method that paddle type mill measures Center Temperature of Coke Cake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610651677.0A CN106225941B (en) | 2016-08-10 | 2016-08-10 | Vibrate the device and method that paddle type mill measures Center Temperature of Coke Cake |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106225941A true CN106225941A (en) | 2016-12-14 |
| CN106225941B CN106225941B (en) | 2018-09-11 |
Family
ID=57548538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610651677.0A Active CN106225941B (en) | 2016-08-10 | 2016-08-10 | Vibrate the device and method that paddle type mill measures Center Temperature of Coke Cake |
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| Country | Link |
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| CN (1) | CN106225941B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109443578A (en) * | 2018-11-26 | 2019-03-08 | 中冶焦耐(大连)工程技术有限公司 | A kind of universal Center Temperature of Coke Cake measuring device and its application method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0737618B2 (en) * | 1989-03-10 | 1995-04-26 | 川崎製鉄株式会社 | A method for determining the horizontal shrinkage coefficient of coke oven charges. |
| JP3314835B2 (en) * | 1993-10-05 | 2002-08-19 | 住友金属工業株式会社 | Method for producing medium-temperature carbonized coke |
| CN2417465Y (en) * | 2000-04-07 | 2001-01-31 | 欧阳诗富 | Arrangement for measuring funal temp. of coke cake |
| CN202226817U (en) * | 2011-06-21 | 2012-05-23 | 中冶焦耐(大连)工程技术有限公司 | Tool for measuring temperature at center of coke cake of large-scale coke oven |
| CN104280148A (en) * | 2014-08-19 | 2015-01-14 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for measuring core temperature of coke cake in coke oven |
| CN204924461U (en) * | 2015-05-27 | 2015-12-30 | 鞍钢股份有限公司 | Device for measuring central temperature of coke cake of large coke oven |
-
2016
- 2016-08-10 CN CN201610651677.0A patent/CN106225941B/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109443578A (en) * | 2018-11-26 | 2019-03-08 | 中冶焦耐(大连)工程技术有限公司 | A kind of universal Center Temperature of Coke Cake measuring device and its application method |
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| CN106225941B (en) | 2018-09-11 |
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| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20170703 Address after: 430083 Gate No. 2, Qingshan District, Hubei, Wuhan Applicant after: Wuhan iron and Steel Company Limited Address before: 430083 Wuhan factory in Hubei Province before the door No. 2 Applicant before: WUHAN IRON AND STEEL CORPORATION |
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