CN109880971A - A kind of method of LF furnace refining slag molten state cycling and reutilization - Google Patents
A kind of method of LF furnace refining slag molten state cycling and reutilization Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/134—Reduction of greenhouse gas [GHG] emissions by avoiding CO2, e.g. using hydrogen
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
A kind of method of LF furnace refining slag molten state cycling and reutilization, comprising the following steps: 1) charging of slagging tap: after LF furnace is normally smelted, by 2) ladle vacuumizes in continuous 2~3 furnace LF refining slag and a small amount of molten steel loading desulfurizer；3) extra electric field desulfurization: cathode is inserted into inside slag, applies a stable electric field outside；4)SO2It collects: high temperature SO2Gas enters SO by pipeline2In collection device, SO2Gas is dissolved in SO2In seawater inside collection device；5) LF furnace recycling is returned.Compared with prior art, the beneficial effects of the present invention are: method of the invention is simple and reliable, desulfuration efficiency is high, refining slag can melt be back to use refining process and do refining slag former, it to reduce the consumption of slag material, shortens the heat, reduces refining slagging process heat loss, steel slag discharge and pollution environment are reduced, the economic benefit of iron and steel enterprise is increased.Also utilizing to metallurgical industry waste residue efficient circulation has important reference and directive significance.
Description
Technical field
The present invention relates to environmental technology field more particularly to a kind of methods of LF furnace refining slag molten state cycling and reutilization.
Background technique
The most efficient utilization ways of LF refining slag are metallurgical reuse, while LF refining waste residue fusing point is low, burn-off rate is fast, alkali
The feature that degree is high, oxidisability is low, hot can be back to refining process.But since S content is higher in LF refining waste residue, in metallurgy
Molten steel " returning sulphur " phenomenon can occur when reuse, to limit the recycling and reusing of LF refining waste residue.Therefore, LF refining slag sulphur removal
Key technique as LF refining slag reuse.
Currently, domestic and foreign scholars are to the research method of sulphur in removal LF refining waste residue mainly from solid-state high-temperature oxidation, solid
State leaching by hydrothermal process method, molten state (hot) oxidizing process etc. are reported.Oxidation desulfurization is mainly at high temperature by slag
In element sulphur be oxidized to gaseous material to remove." The Iron and Steel Institute of Japan " magazine
The periodical of volume 48 the 21st has stepped on entitled " the Regeneration Process of of Japanese scholars Kobayashi J et al.
Desulphurization Slag Containing CaF2By Oxidation " paper, the paper will it is cooling after
Refining waste residue be crushed to 0.074mm hereinafter, being passed through 79%Ar+21%O at 1100 DEG C2Mixed gas, carry out oxidation roasting
Desulfurization is burnt, desulfurization degree refining slag after 50% or so, desulfurization can recycle." Metallurgy " magazine the 10th phase in 1987
Entitled " the Increasing the Efficiency of Ladle Desulfurization of of Bigeev et al. is published
Steel by Regenerated Slags " paper, paper molten state refining waste residue recycling utilization technique,
By flame gun in the case where not yet tapping in insertion refining slag, the element sulphur in slag is oxidized to gaseous material removing.One
It plants hot process (CN 104109737A) patent disclosure recycled of LF refining slag and is passed through air or oxygen into slag
Gas blows afloat position and is evenly arranged in the top of the slag, ventilation flow rate 50-300Nm3/ (ht) keeps blow air temperature 1300 in air blowing process
~1450 DEG C, gassing time 30min, sulphur is with SO in slag2Form discharge, available higher desulfurization degree.Solid-state leaching by hydrothermal process
The principle of method is that sulphur is with S in leaching by hydrothermal process treatment process2-Form enters in leachate, the H separated out with hydrolysis+In conjunction with first shape
At HS-, then it is further formed H2S is finally reached the purpose that sulphur in waste residue is leached to removal.
There are some defects for the above-mentioned research method for removing sulphur in LF refining waste residue, main to show: (1) refining slag cooling crush
Solid-state high-temperature oxydation afterwards, heat cannot be fully utilized, and subsequent cycle is slow using cold slag charge slag making slagging speed, be unfavorable for saving
It can consumption reduction.(2) higher production efficiency, the other elements such as carbon and silicon in oxidizable molten steel are needed, while requiring slag blanket necessary
With very big thickness, but if slag blanket is blocked up to be easy to cause in furnace that headroom is too small to keep slag blanket stirring uneven, cause at refining slag
It is undesirable to manage effect.(3) the hot oxidizing process of LF refining slag is limited by production space and is difficult to realize, and 1300~1450 DEG C of temperature
High-temperature gas it is difficult to ensure that.(4) solid water hot extraction wastes a large amount of cooling water and steel slag heat during processing, also
Cause secondary pollution.
Summary of the invention
The object of the present invention is to provide a kind of methods of LF furnace refining slag molten state cycling and reutilization, according to high temperature melt furnace
The electric conductivity and S of slag2-Distribution and existing forms, under the action of applying direct current electric field, cathode insertion melting slag blanket inside, sun
Molten steel layer, the outer O of furnace are inserted into pole22e, which is obtained, by cathode solid electrolyte becomes (O2-), (O2-)、(S2-) under the action of electric field,
Anode region displacement is simultaneously enriched with, (O2-) lose 2e and become (O) atom, (S2-) lose 2e and become (S) atom, in slag
(S) atom produces SO in conjunction with 2 superfluous (O) atoms2Gas, content can be recycled by being reduced to its sulfur content, then
It returns LF furnace again as pre-melted slag to be recycled, eventually arrives at the purpose that LF refining slag efficient circulation utilizes.
To achieve the above object, the present invention is implemented with the following technical solutions:
A kind of method of LF furnace refining slag molten state cycling and reutilization, comprising the following steps:
1) it slags tap charging: after LF furnace is normally smelted, continuous 2~3 furnace LF refining slag and a small amount of molten steel being packed into desulfurization
In device, slag gold mass ratio is 5~10, and slag temperature is 1300-1400 DEG C；
2) it vacuumizes: covering the steel ladle cover of desulfurizer, first pass through air pump and gas in ladle is discharged, make the pressure in ladle
Power reaches certain vacuum degree, reduces SO2Partial pressure is conducive to SO2Gas discharges out of the furnace；Vacuum degree control range are as follows: 100Pa
~1000Pa.
3) extra electric field desulfurization: cathode is inserted into inside slag, and cathode insertion depth is the 1/2-2/3 of slag total depth
Place applies a stable electric field outside, the outer O of furnace2Be transmitted in slag by cathode solid electrolyte, and with S in slag
It reacts and generates SO2Gas simultaneously excludes outside ladle；The output voltage U < U of external dc power supplyE, UEFor cathode solid electrolyte
Decomposition voltage, the output electric current I of external dc power supply is 1~10A；
4)SO2It collects: high temperature SO2Gas enters SO by pipeline2In collection device, SO2Gas is dissolved in SO2Collection device
In internal seawater, sulphite or sulfate are formed, SO is reduced2Environmental pollution in air is discharged；The salinity of seawater is big
In 4.5wt%, basicity is greater than 3.4mmolL-1；
5) it returns LF furnace recycling: stopping power supply after sulphur takes off a period of time in slag, cathode is risen, open steel ladle cover,
Slag is reloaded into LF furnace as pre-melted slag and carries out molten steel desulfurizing；Power supply desulfurization time be(S)0
For the initial S mass percentage of slag, (S)tFor the S mass percentage of slag t moment, K is desulfurization rate, unit 1/min,
K=0.012~0.021.
A kind of desulfurizer that the method for LF furnace refining slag molten state cycling and reutilization uses, including ladle, cathode, sun
Pole, SO2Collection device, electrode lifting device, air pump, the cathode is mounted on electrode lifting device protrudes into steel above ladle
In slag in packet, for the anode from the molten steel that ladle bottom protrudes into ladle bottom, cathode connects DC power supply, institute with anode
State SO2Collection device is connected to ladle top by pipeline, and air pump is installed on connecting pipe, and the ladle bottom is slope,
The lowermost end on slope is equipped with tapping hole.
Slag Electrochemistry Desulfurization principle and process are as follows:
According to the ionic theory of clinker, under high temperature fused state, oxonium ion, sulphion, each metalloid are contained in clinker
The substances such as cationic, different complicated ions groups.The DC electric field for applying certain orientation between slag gold, can control sulphion in body
Migratory direction in system, importing excessive oxonium ion by orientation makes sulphion reaction production SO2Gas is to reach removing slag
The purpose of middle sulphur.Desulfurization by slag process can be completed by following steps:
(1) sulphion in slag is under the action of electric field to slag-metal interface migration
(S2-)Slag→(S2-)Interface
(2) anode reaction occurs in slag-metal interface
(S2-)-2e→(S)
(O2-)-2e→(O)
(3) oxygen outside furnace is changed into oxonium ion by cathode solid electrolytic
2O2+4e→2O2-
(4) cathode surface oxonium ion is diffused into inside slag
2O2-→2(O2-)
(5) oxygen atom reacts generation SO with sulphur atom in slag2Gas
(S)+2 (O)=SO2
Compared with prior art, the beneficial effects of the present invention are:
Method of the invention is simple and reliable, and desulfuration efficiency is high, refining slag can melt be back to use refining process and do refining slag making
Agent is shortened the heat to reduce the consumption of slag material, reduces refining slagging process heat loss, reduces steel slag discharge and dirt
Environment is contaminated, the economic benefit of iron and steel enterprise is increased.Also utilizing to metallurgical industry waste residue efficient circulation has important reference and refers to
Lead meaning.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of inventive desulfurization device.
In figure: 1- molten steel；2- tapping hole；3- electrode support；4- ladle；5- slag；6- electrode clamping device；7- cathode；
8- electrode lifting device；9- air pump；10-SO2Collection device；11- DC power supply；12- anode.
Specific embodiment
It elaborates below to the present invention, but practical range of the invention is not limited only to embodiment disclosed below.
A kind of method of LF furnace refining slag molten state cycling and reutilization, comprising the following steps:
1) it slags tap charging: after LF furnace is normally smelted, continuous 2~3 furnace LF refining slag and a small amount of molten steel being packed into desulfurization
In device, slag gold mass ratio is 5~10, and slag temperature is 1300-1400 DEG C；
2) it vacuumizes: covering the steel ladle cover of desulfurizer, first pass through air pump and gas in ladle is discharged, make the pressure in ladle
Power reaches certain vacuum degree, reduces SO2Partial pressure is conducive to SO2Gas discharges out of the furnace；Vacuum degree control range are as follows: 100Pa
~1000Pa.
3) extra electric field desulfurization: cathode is inserted directly into inside slag by electrode lifting device, and cathode insertion depth is
At the 1/2-2/3 of slag total depth, apply a stable electric field outside, the outer O of furnace2It is transmitted to by cathode solid electrolyte
In slag, and reacts with S in slag and generate SO2Gas simultaneously excludes outside ladle；The output voltage U < U of external dc power supplyE,
UEFor the decomposition voltage of cathode solid electrolyte, the output electric current I of external dc power supply is 1~10A；
4)SO2It collects: high temperature SO2Gas enters SO by pipeline2In collection device, SO2Gas is dissolved in SO2Collection device
In internal seawater, sulphite or sulfate are formed, SO is reduced2Environmental pollution in air is discharged；The salinity of seawater is big
In 4.5wt%, basicity is greater than 3.4mmolL-1；
5) it returns LF furnace recycling: stopping power supply after sulphur takes off a period of time in slag, by electrode lifting device by cathode
It rises, opens steel ladle cover, slag is reloaded into LF furnace as pre-melted slag and carries out molten steel desulfurizing；Power-on time is(S)0For the initial S mass percentage of slag, (S)tFor the S mass percentage of slag t moment, K
For desulfurization rate, unit 1/min, K=0.012~0.021.
6) tap: when molten steel interface reaches more than bottom ramp highest point A20%-50% height, molten steel is from tapping hole
It is discharged in other ladles, makes at the near A point of liquid steel level.
See Fig. 1, a kind of desulfurizer that the method for LF furnace refining slag molten state cycling and reutilization uses, including ladle 4, yin
Pole 7, anode 12, SO2Collection device 10, electrode lifting device 8, air pump 9, the cathode 7 be mounted on electrode lifting device 8 from
It is protruded into above ladle 4 in the slag 5 in ladle 4, the anode 12 is from the molten steel 1 that 4 bottom of ladle is protruded into 4 bottom of ladle, yin
Pole 7 and anode 12 connect DC power supply 11, the SO2Collection device 10 is connected to 4 top of ladle by pipeline, on connecting pipe
Air pump 9 is installed, 4 bottom of ladle is slope, and the lowermost end on slope is equipped with tapping hole 2.
Cathode 7 can be several, presents and is uniformly distributed on slag interface, cathode be by conducting ceramic material preparation and
At.Electrode support 3, electrode lifting device 8, electrode clamping device 6 are non-conductive material.
Embodiment 1
After LF furnace is normally smelted, by 10 tons of LF refining slags of continuous 3 furnace, 1 ton of molten steel is packed into desulfurizer, and slag is golden
For amount than being 10, the range of slag temperature is 1400 DEG C；Steel ladle cover is covered, air pump is first passed through and gas in ladle is discharged, make ladle
Interior pressure reaches 10-2Pa；Cathode is inserted directly into inside slag by rise fall of electrodes dress, and slag total depth is 4.5m, and cathode is inserted
The depth for entering liquid level is 3m, applies a stable electric field, the output voltage U of external dc power supply, numerical value U=outside
1.5V, output electric current I are 10A；The outer O of furnace2It is transmitted in slag by cathode solid electrolyte, and occurred instead with S in slag
SO should be produced2Gas and exclude outside furnace；High temperature SO2Gas enters SO by pipeline2In collection device, SO2Gas dissolves in the inner
In the seawater in portion, the salinity of seawater is 4.6wt%, and it is 3.5mmolL that basicity, which is greater than,-1；Sulphite or sulfate are formed, is supplied
The electric time is 40min, and K numerical value is 0.0124 (1/min), after slag stops powering, by electrode lifting device by cathode liter
It rises, opens steel ladle cover, slag is reloaded into LF furnace as pre-melted slag and carries out molten steel desulfurizing.If when molten steel interface reaches more than
When A point 20-50% height, molten steel is discharged in other ladles from the tapping mouth of a river, is made at the near A point of liquid steel level.
Embodiment 2
After LF furnace is normally smelted, by 8 tons of LF refining slags of continuous 2 furnace, 1.6 tons of molten steel are packed into desulfurizer, slag gold
Mass ratio is 5, and the range of slag temperature is 1300 DEG C；Steel ladle cover is covered, air pump is first passed through and gas in ladle is discharged, make ladle
Interior pressure reaches 10-2Pa；Cathode is inserted directly into inside slag by rise fall of electrodes dress, and slag total depth is 4.5m, and cathode is inserted
The depth for entering liquid level is 2.25m, applies a stable electric field, the output voltage U of external dc power supply, numerical value U outside
=1.0V, output electric current I are 10A；The outer O of furnace2It is transmitted in slag by cathode solid electrolyte, and occurred with S in slag
Reaction production SO2Gas and exclude outside furnace；High temperature SO2Gas is entered by pipeline into SO2In collection device, SO2Gas dissolution
In the inner in the seawater in portion, the salinity of seawater is 4.6wt%, and it is 3.8mmolL that basicity, which is greater than,-1；Form sulphite or sulfuric acid
Salt, power-on time 24min, K are that numerical value is 0.012 (min-1), it, will be negative by electrode lifting device after slag stops powering
Pole is risen, and steel ladle cover is opened, and slag is reloaded LF furnace as pre-melted slag and carries out molten steel desulfurizing.If when molten steel interface reaches
When more than A point 20-50% height, molten steel is discharged in other ladles from the tapping mouth of a river, is made at the near A point of liquid steel level.
Refining slag chemical component, technological parameter and desulfurization results are shown in Table 1, table 2, table 3.
Ingredient (wt%) before 1 LF refining slag desulfurization of table
| Serial number | CaO | SiO2 | Al2O3 | MgO | MnO | FeO | S | F- | R |
| Embodiment 1 | 51.61 | 4.85 | 29.82 | 8.1 | 0.17 | 0.9 | 0.62 | 6.91 | 10.44 |
| Embodiment 2 | 52.49 | 4.52 | 28.5 | 6.8 | 0.37 | 0.9 | 0.41 | 13.64 | 11.61 |
Ingredient (wt%) after 2 LF refining slag desulfurization of table
| Serial number | CaO | SiO2 | Al2O3 | MgO | MnO | FeO | S | F- | R |
| Embodiment 1 | 51.34 | 4.56 | 29.12 | 7.93 | 0.14 | 0.45 | 0.124 | 6.66 | 11.25 |
| Embodiment 2 | 52.12 | 4.23 | 28.23 | 6.56 | 0.27 | 0.34 | 0.127 | 13.44 | 12.32 |
3 technological parameter of table and desulfurization results
Claims (2)
1. a kind of method of LF furnace refining slag molten state cycling and reutilization, which comprises the following steps:
1) it slags tap charging: after LF furnace is normally smelted, continuous 2~3 furnace LF refining slag and a small amount of molten steel being packed into desulfurizer
Interior, slag gold mass ratio is 5~10, and slag temperature is 1300-1400 DEG C；
2) it vacuumizes: covering the steel ladle cover of desulfurizer, first pass through air pump and gas in ladle is discharged, reach the pressure in ladle
To certain vacuum degree, SO is reduced2Partial pressure is conducive to SO2Gas discharges out of the furnace；Vacuum degree control range are as follows: 100Pa~
1000Pa。
3) extra electric field desulfurization: by cathode be inserted into slag inside, cathode insertion depth be slag total depth 1/2-2/3 at,
One stable electric field of outer application, the outer O of furnace2It is transmitted in slag by cathode solid electrolyte, and occurred instead with S in slag
SO should be generated2Gas simultaneously excludes outside ladle；The output voltage U < U of external dc power supplyE, UEFor the decomposition of cathode solid electrolyte
Voltage, the output electric current I of external dc power supply are 1~10A；
4)SO2It collects: high temperature SO2Gas enters SO by pipeline2In collection device, SO2Gas is dissolved in SO2Inside collection device
Seawater in, form sulphite or sulfate, reduce SO2Environmental pollution in air is discharged；The salinity of seawater is greater than
4.5wt%, basicity are greater than 3.4mmolL-1；
5) it returns LF furnace recycling: stopping power supply after sulphur of powering in slag takes off a period of time, cathode is risen, open steel ladle cover,
Slag is reloaded into LF furnace as pre-melted slag and carries out molten steel desulfurizing；Power supply desulfurization time be(S)0
For the initial S mass percentage of slag, (S)tFor the S mass percentage of slag t moment, K is desulfurization rate, unit 1/min,
K=0.012~0.021.
2. the desulfurizer that a kind of method of LF furnace refining slag molten state cycling and reutilization as described in claim 1 uses,
It is characterized in that, including ladle, cathode, anode, SO2Collection device, electrode lifting device, air pump, the cathode are mounted on electrode
From being protruded into the slag in ladle above ladle on lifting device, the anode protrudes into the molten steel of ladle bottom from ladle bottom
In, cathode connects DC power supply, the SO with anode2Collection device is connected to ladle top by pipeline, pacifies on connecting pipe
Air pump is filled, the ladle bottom is slope, and the lowermost end on slope is equipped with tapping hole.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110819418A (en) * | 2019-11-28 | 2020-02-21 | 东北石油大学 | Method for efficiently desulfurizing and producing hydrogen based on solar STEP thermal-electrochemical coupling |
| CN114593664A (en) * | 2022-02-23 | 2022-06-07 | 本钢板材股份有限公司 | Refining LF furnace clearance measurement method based on graphite electrode |
| CN115852090A (en) * | 2022-11-15 | 2023-03-28 | 安徽工业大学 | Method for modifying and recycling metallurgical refining waste residues |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU342925A1 (en) * | В. П. Немченко, К. М. Петров, Н. Н. Власов , С. И. Попель Уральский научно исследовательский институт черных металлов | METHOD OF DESIGN OF SLAG | ||
| CN102041329A (en) * | 2009-10-12 | 2011-05-04 | 河南凤宝钢铁有限公司 | LF (Ladle Furnace) hot steel slag recycling process |
| CN102399937A (en) * | 2010-09-07 | 2012-04-04 | 鞍钢股份有限公司 | Molten steel electrochemical desulphurization method and apparatus |
| CN104109735A (en) * | 2014-07-25 | 2014-10-22 | 北京科技大学 | Process method for LF refining slag desulfurization and metallurgical internal cyclic utilization |
-
2019
- 2019-04-03 CN CN201910266006.6A patent/CN109880971B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU342925A1 (en) * | В. П. Немченко, К. М. Петров, Н. Н. Власов , С. И. Попель Уральский научно исследовательский институт черных металлов | METHOD OF DESIGN OF SLAG | ||
| CN102041329A (en) * | 2009-10-12 | 2011-05-04 | 河南凤宝钢铁有限公司 | LF (Ladle Furnace) hot steel slag recycling process |
| CN102399937A (en) * | 2010-09-07 | 2012-04-04 | 鞍钢股份有限公司 | Molten steel electrochemical desulphurization method and apparatus |
| CN104109735A (en) * | 2014-07-25 | 2014-10-22 | 北京科技大学 | Process method for LF refining slag desulfurization and metallurgical internal cyclic utilization |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110819418A (en) * | 2019-11-28 | 2020-02-21 | 东北石油大学 | Method for efficiently desulfurizing and producing hydrogen based on solar STEP thermal-electrochemical coupling |
| CN114593664A (en) * | 2022-02-23 | 2022-06-07 | 本钢板材股份有限公司 | Refining LF furnace clearance measurement method based on graphite electrode |
| CN114593664B (en) * | 2022-02-23 | 2023-05-26 | 本钢板材股份有限公司 | Refining LF furnace clearance measurement method based on graphite electrode |
| CN115852090A (en) * | 2022-11-15 | 2023-03-28 | 安徽工业大学 | Method for modifying and recycling metallurgical refining waste residues |
| CN115852090B (en) * | 2022-11-15 | 2023-09-29 | 安徽工业大学 | Method for modifying and recycling metallurgical refining waste residues |
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Effective date of registration: 20230629 Address after: 114000 185 Qianshan Middle Road, high tech Zone, Anshan City, Liaoning Province Patentee after: Liaoning kedazhonghao Magnesium Technology Co.,Ltd. Address before: 114044, No. 185, Qianshan Road, hi tech Zone, Liaoning, Anshan Patentee before: University of Science and Technology Liaoning |