CN110499430A - 7.5 tons of I type furnaces produce titanium sponge vacuum system - Google Patents
7.5 tons of I type furnaces produce titanium sponge vacuum system Download PDFInfo
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- CN110499430A CN110499430A CN201910783529.8A CN201910783529A CN110499430A CN 110499430 A CN110499430 A CN 110499430A CN 201910783529 A CN201910783529 A CN 201910783529A CN 110499430 A CN110499430 A CN 110499430A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B34/00—Obtaining refractory metals
- C22B34/10—Obtaining titanium, zirconium or hafnium
- C22B34/12—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08
- C22B34/1295—Refining, melting, remelting, working up of titanium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/02—Refining by liquating, filtering, centrifuging, distilling, or supersonic wave action including acoustic waves
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Abstract
The invention discloses a kind of 7.5 tons of I type furnaces to produce titanium sponge vacuum system, belongs to titanium sponge preparation field, and solving the problem of existing vacuum system, there are pump oils to pollute titanium sponge using slide valve pump as roughing vacuum pump.The technical solution adopted by the present invention is that: 7.5 tons of I type furnaces produce titanium sponge vacuum system, including basic, normal, high three vacuum suction accesses, low vacuum is evacuated access: the-the first trap of the-the first Pneumatic baffle valve of distiller-the-the first screw pump of the-the second hand-operated valve of first manual valve and third Pneumatic baffle valve；Middle vacuum suction access: the-the first trap of the-the first Pneumatic baffle valve of distiller-first manual valve-pneumatic gate valve-the-the second screw pump of third hand-operated valve and four Pneumatic baffle valves-lobe pump；Fine pumping access: the-the second trap of the-the second Pneumatic baffle valve of distiller-oil booster pump-the-the second screw pump of third hand-operated valve and four Pneumatic baffle valves-lobe pump.The present invention is suitable for vacuum distillation method and prepares titanium sponge.
Description
Technical field
The invention belongs to titanium sponge preparation fields, and in particular to a kind of 7.5 tons of I type furnaces production titanium sponge vacuum system.
Background technique
Titanium or titanium alloy has the characteristics that intensity is high, corrosion-resistant, high temperature resistant, in aerospace, deep-sea detecting, chemical industry, doctor
The fields such as treatment, which have, to be widely applied.The raw material that titanium sponge is prepared as titanium or titanium alloy, is industrially prepared by magnesium reduction process.Magnesium
Restore TiCl4Obtained titanium sponge remains 8~12% MgCl2, 25~30% Mg, it is industrial generally to be steamed using vacuum
The method of evaporating is separated.
Important component of the vacuum system as titanium sponge production device, final vacuum, the speed of exhaust, air-tightness
Etc. performances directly affect titanium sponge vacuum separation efficiency and titanium sponge quality.To enable titanium sponge and MgCl2, Mg thoroughly
Separation, under different vacuum degrees, vacuum system should have speed of exhaust height, air-tightness good, and vacuum pump evacuation medium does not pollute sea
Continuous titanium, vacuum pipeline and the vacuum degree for distilling container can monitor in real time, and each access that is evacuated can remotely be cut, to prevent vacuum pump
The features such as mechanical breakdown occurs and distillation process is caused surprisingly to be cut off.
It is disclosed document and titanium sponge production is described with vacuum system, the pumping of common concern vacuum pump set
Rate and final vacuum, but do not consider that distillation process vacuum degree is monitored, pump oil pollution titanium sponge, is respectively evacuated between access remotely certainly
The problems such as dynamic switching.For example, the patent that Authorization Notice No. is CN200996039Y disclosed it is a kind of for titanium sponge production
Vacuum system.The vacuum system uses slide valve pump as the aspiration pump of low vacuum system and the thick pumping of high vacuum system oil booster pump
Pump, since slide valve pump is oil sealing mechanical pump, pumped gas remains pumping fluid molecule, titanium sponge easy to pollute.In addition,
Vacuum system is not designed with vacuum meter, and use process occurs gas leakage and is difficult to be found at the first time.Authorization Notice No. is
The patent of CN201915135U discloses and system is evaporated in vacuo used in a kind of titanium sponge production.The vacuum distillation system is same
It the use of oil seal type slide valve pump is the roughing vacuum pump that low vacuum is evacuated main pump and high vacuum access.In addition, the vacuum distillation system is not set
In respect of components such as vacuum meter, vacuum valves, do not consider that the switching of pumping access when mechanical breakdown occurs for vacuum pump uses problem yet.
The patent of Publication No. CN101639728A discloses a kind of vacuum distillation system for producing titanium sponge by adopting magnesium reduction distillation furnace.The vacuum
Distallation systm devises four pumping accesses according to vacuum distillation feature, still uses slide valve pump as roughing vacuum pump；The vacuum distillation
System is not monitored in real time by vacuum degree equally, and there is also the problems that remote auto switching between each pumping access is difficult.
Summary of the invention
The present invention provides a kind of 7.5 tons of I type furnaces production titanium sponge vacuum system, solves existing vacuum system with slide valve pump
As roughing vacuum pump, there are problems that pump oil pollutes titanium sponge.
The technical solution adopted by the present invention to solve the technical problems is: 7.5 tons of I type furnaces produce titanium sponge vacuum system
System, including distiller, distiller are separately connected the first Pneumatic baffle valve and the second Pneumatic baffle valve, the first pneumatic gear by threeway
Plate valve is connect with the first trap, and the first trap is connect with first manual valve, and first manual valve connects the first screw pump, and
The second hand-operated valve and third Pneumatic baffle valve are also arranged in series on pipeline between first manual valve and the first screw pump；Second gas
Dynamic flapper valve is connect with the second trap, and the second trap is connect with oily booster pump, and oily booster pump is connect with lobe pump, lobe pump
The second screw pump is connected, and is also arranged in series third hand-operated valve and the 4th pneumatically on the pipeline between oily booster pump and lobe pump
Flapper valve；First tie point is set between first manual valve and the second hand-operated valve, is arranged between oily booster pump and third hand-operated valve
Second tie point is connected between two tie points by connecting tube, and pneumatic gate valve is arranged in connecting tube.
Specific: 7.5 tons of I type furnace production titanium sponge vacuum systems include basic, normal, high three vacuum suction accesses,
In: low vacuum be evacuated access are as follows: the-the first trap of the-the first Pneumatic baffle valve of distiller-the-the second hand-operated valve of first manual valve and
The-the first screw pump of third Pneumatic baffle valve；Middle vacuum suction access are as follows: the-the first trap of the-the first Pneumatic baffle valve of distiller-
First manual valve-pneumatic gate valve-the-the second screw pump of third hand-operated valve and four Pneumatic baffle valves-lobe pump；Fine pumping
Access: the-the second trap of the-the second Pneumatic baffle valve of distiller-oil booster pump-third hand-operated valve and four Pneumatic baffle valves-sieve
Thatch pumps the-the second screw pump.
More particularly: the operating pressure that low vacuum is evacuated access is 105Pa~1000Pa, the work of hollow pumping access
Pressure is 10Pa~1000Pa, and the operating pressure of fine pumping access is 0.001Pa~10Pa.
Further, vacuum meter is arranged between the distiller and threeway, between first manual valve and the first tie point
Vacuum meter is set, vacuum meter is set between third hand-operated valve and the 4th Pneumatic baffle valve.
Specific: the vacuum is calculated as resistance-type vacuum gauge.
It is specific: the model LGB150 of first screw pump and the second screw pump, the model JZJ600 of lobe pump,
The model Z320 of oily booster pump.
Specific: the filter medium of first trap is active carbon, and the filter medium of the second trap is that partial size is small
In 3mm titanium sponge.
It is specific: the connection type of the pipeline of 7.5 tons of I type furnace production titanium sponge vacuum systems are as follows: detachable flange
Formula connection.More specific: the material of the gasket seal of detachable flange form connection is fluorine-containing nitrile rubber.
The beneficial effects of the present invention are: 7.5 tons of I type furnaces produce titanium sponge vacuum system, made using the screw pump of dry type
For the aspiration pump of low vacuum access, the aspiration pump of screw pump, the lobe pump vacuum stages in is used, compared with oil seal type mechanical pump
For (sliding valve vacuum pump), pollution of the pumping fluid to titanium sponge is avoided, help to obtain the high-quality sponge of low C content
Titanium.
The present invention includes basic, normal, high three vacuum suction accesses, and different pumping accesses is used under different vacuum degrees,
To reach the highest speed of exhaust, meet large size 7.5tI type furnace titanium sponge production.Within the distillation period, the pumping of vacuum system
Ability is 150~3500L/s, and final vacuum is up to 0.001Pa；Leak rate of the vacuum system in vacuum degree 10Pa is less than
0.27Pa/min.This vacuum system has high final vacuum, speed of exhaust height, leak rate low, and middle Roughing line can be automatic
The features such as switching, vacuum degree can monitor in real time, and titanium sponge is not polluted by evacuation medium is imitated to titanium sponge vacuum distillation is improved
Rate improves titanium sponge quality and is of great significance.
Each access design of vacuum system has vacuum meter, can monitor the pressure of vacuum tank and pipeline in real time, work as vacuum degree
Remote controlled Pneumatic baffle valve when abnormal, quickly carry out in, low vacuum unit switching, effectively prevent pump exhaust capacity decline,
Vacuum pipe gas leakage causes titanium sponge by air pollution, titanium sponge caused by preventing pump mechanical breakdown and pipeline air-tightness bad
N, the higher problem of O content.
Detailed description of the invention
Fig. 1 is the schematic diagram of 7.5 tons of I type furnace production titanium sponge vacuum systems of the present invention.
Components, position and number in figure: distiller 1, the first Pneumatic baffle valve 2, the second Pneumatic baffle valve 3, first catch
Storage 4, first manual valve 5, the second hand-operated valve 6, third Pneumatic baffle valve 7, the first screw pump 8, the second trap 9, oil pressurization
Pump 10, third hand-operated valve 11, the 4th Pneumatic baffle valve 12, lobe pump 13, the second screw pump 14, pneumatic gate valve 15, vacuum meter
16。
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
As shown in Figure 1,7.5 tons of I type furnaces of the present invention produce titanium sponge vacuum system, including basic, normal, high three vacuum are taken out
Gas access, building block include distiller 1, and distiller 1 is separately connected the first Pneumatic baffle valve 2 and the second pneumatic gear by threeway
Plate valve 3, the connection at this place are connected by vacuum pipe, similarly hereinafter.Vacuum meter 16 is also set up between distiller 1 and threeway.
First Pneumatic baffle valve 2 is connect with the first trap 4, and the first trap 4 is connect with first manual valve 5, first-hand
Dynamic valve 5 connects the second hand-operated valve 6, and the second hand-operated valve 6 connects third Pneumatic baffle valve 7, and third Pneumatic baffle valve 7 connects the first spiral shell
Bar pump.Wherein, vacuum meter 16 is also set up between first manual valve 5 and the second hand-operated valve 6.Low vacuum is evacuated access are as follows: distiller
1- vacuum meter 16- the first Pneumatic baffle valve 2- the first trap 4- first manual valve 5- vacuum meter 16- the second hand-operated valve 6- third
The first screw pump of Pneumatic baffle valve 7- 8.The operating pressure that low vacuum is evacuated access is 105Pa~1000Pa.
Second Pneumatic baffle valve 3 is connect with the second trap 9, and the second trap 9 is connect with oily booster pump 10, oily booster pump
10 connect with third hand-operated valve 11, and third hand-operated valve 11 is connect with the 4th Pneumatic baffle valve 12, the 4th Pneumatic baffle valve 12 and sieve
13 connection of thatch pump, lobe pump 13 connect the second screw pump 14.Wherein, vacuum is set between the second trap 9 and oily booster pump 10
Vacuum meter 16 is arranged in meter 16 between third hand-operated valve 11 and the 4th Pneumatic baffle valve 12.Fine pumping access are as follows: distiller 1-
Vacuum meter 16- the second Pneumatic baffle valve 3- the second trap 9- vacuum meter 16- oil booster pump 10- third hand-operated valve 11- vacuum meter
The 4th the second screw pump of Pneumatic baffle valve 12- lobe pump 13- 14 of 16-.The operating pressure of fine pumping access be 0.001Pa~
10Pa。
First tie point is set between first manual valve 5 and the second hand-operated valve 6, oily booster pump 10 and third hand-operated valve 11 it
Between the second tie point is set, be connected between the first tie point and the second tie point by connecting tube, setting is pneumatic in connecting tube inserts
Plate valve 15.Middle vacuum suction access are as follows: distiller 1- vacuum meter 16- the first Pneumatic baffle valve 2- the first trap 4- first manual
The 4th Pneumatic baffle valve 12- lobe pump 13- of valve 5- vacuum meter 16- pneumatic gate valve 15- third hand-operated valve 11- vacuum meter 16-
Two screw pumps 14.The operating pressure of hollow pumping access is 10Pa~1000Pa.
The vacuum degree of 7.5 tons of I type furnace production titanium sponge vacuum systems distills vacuum pump set in the period up to 0.001Pa
150~3500L/s of pumping speed, leak rate of the Distallation systm in vacuum degree 10Pa are less than 0.27Pa/min.The present invention has the limit
Vacuum degree is high, the speed of exhaust is high, leak rate is low, and middle Roughing line can automatically switch, and vacuum degree can monitor in real time, and titanium sponge is not
The characteristics of being polluted by evacuation medium.
Specifically, vacuum meter 16 is resistance-type vacuum gauge, the model of the first screw pump 8 and the second screw pump 14
LGB150, the model JZJ600, the model Z320 of oily booster pump 10 of lobe pump 13.The filter medium of first trap 4 is
Active carbon, the filter medium of the second trap 9 are that partial size is less than 3mm titanium sponge.7.5 tons of I type furnaces produce titanium sponge vacuum system
The connection type of the pipeline of system is the connection of detachable flange form.The material of the gasket seal of detachable flange form connection is preferred
Fluorine-containing nitrile rubber.
Development trend of the enlargement as titanium sponge production technology, the exhaust capacity of vacuum system, including final vacuum,
The speed of exhaust, air-tightness, pay close attention to by industry.In vacuum distillation process, the pressure limit of distiller 1 is 0.01~105Pa, because
This need to use the different vacuum pump of operating pressure be evacuated during 1 pressure of distiller declines, the present invention be provided with it is high,
In, low three vacuum suction accesses.To prevent the evacuation medium (pumping fluid) of vacuum pump from polluting titanium sponge, the present invention selects spiral shell
Bar pumps the roughing vacuum pump as vacuum system, that is, selects above-mentioned first screw pump 8 and the second screw pump 14 as the thick of vacuum system
Take out pump.
Since screw pump is 102~105Pa, lobe pump 13 is 1~103Pa, oily booster pump have volume in 0.001~10Pa
The fixed speed of exhaust, therefore when 1 pressure of distiller is 103~105When Pa, using the first screw pump 8 be main pump pumping access into
Row pumping.When distiller pressure be 10~1000Pa when, using lobe pump 13, the second screw pump 14 be main pump pumping access into
Row pumping.It the use of oily booster pump 10, lobe pump 13, the second screw pump 14 is main pump when distiller pressure is 0.001~10Pa
Pumping access be evacuated.Since the air-tightness of vacuum system, the vacuum pump speed of exhaust directly affect titanium sponge quality (master
Want N, O, Cl), therefore vacuum system is still needed to vacuum degree real time monitoring, therefore vacuum meter 16 is set.
7.5 tons of I type furnace production titanium sponge vacuum systems have the characteristics that following three: (1) can make under different vacuum degrees
Meet large size 7.5tI type furnace titanium sponge production with different pumping accesses to reach the highest speed of exhaust.(2) screw rod is used
Pump+lobe pump structure compared with using slide valve pump as the existing scheme of roughing vacuum pump there is pumping not pollute the spy of titanium sponge
Point help to obtain the high-quality titanium sponge of low C content.(3) using vacuum meter real time monitoring distiller 1 and vacuum pipe
Pressure can switch vacuum passage by Pneumatic baffle valve remote auto, and when pressure anomaly can be switched fast pumping access, prevent from pumping
The higher problem of titanium sponge N, O content caused by mechanical breakdown and pipeline air-tightness are bad.
Claims (9)
1.7.5 ton I type furnace produces titanium sponge vacuum system, it is characterised in that: including distiller (1), distiller (1) passes through three
It is logical to be separately connected the first Pneumatic baffle valve (2) and the second Pneumatic baffle valve (3), the first Pneumatic baffle valve (2) and the first trap
(4) it connecting, the first trap (4) is connect with first manual valve (5), and first manual valve (5) connects the first screw pump (8), and
The second hand-operated valve (6) and third pneumatic baffle are also arranged in series on pipeline between first manual valve (5) and the first screw pump (8)
Valve (7)；Second Pneumatic baffle valve (3) is connect with the second trap (9), and the second trap (9) is connect with oily booster pump (10), oil
Booster pump (10) is connect with lobe pump (13), and lobe pump (13) connects the second screw pump (14), and oily booster pump (10) and sieve
Third hand-operated valve (11) and the 4th Pneumatic baffle valve (12) are also arranged in series on pipeline between thatch pump (13)；First manual valve
(5) the first tie point is set between the second hand-operated valve (6), is arranged second between oily booster pump (10) and third hand-operated valve (11)
Tie point is connected between two tie points by connecting tube, and pneumatic gate valve (15) are arranged in connecting tube.
2. 7.5 tons of I type furnace as described in claim 1 produces titanium sponge vacuum system, it is characterised in that: 7.5 tons of I type furnaces are raw
Producing titanium sponge vacuum system includes basic, normal, high three vacuum suction accesses, in which: low vacuum is evacuated access are as follows: distiller
(2)-the first trap (4) of (1)-the first Pneumatic baffle valve-(5)-the second hand-operated valve (6) of first manual valve and third pneumatic baffle
(7)-the first screw pump (8) of valve；Middle vacuum suction access are as follows: (2)-the first trap of (1)-the first Pneumatic baffle valve of distiller
(4)-first manual valve (5)-pneumatic gate valve (15)-third hand-operated valve (11) and the 4th Pneumatic baffle valve (12)-lobe pump
(13)-the second screw pumps (14)；Fine pumping access: (3)-the second trap (9) of (1)-the second Pneumatic baffle valve of distiller-
(13)-the second screw pump (14) of oily booster pump (10)-third hand-operated valve (11) and the 4th Pneumatic baffle valve (12)-lobe pump.
3. 7.5 tons of I type furnace as claimed in claim 2 produces titanium sponge vacuum system, it is characterised in that: low vacuum pumping is logical
The operating pressure on road is 105The operating pressure of Pa~1000Pa, hollow pumping access are 10Pa~1000Pa, and fine pumping is logical
The operating pressure on road is 0.001Pa~10Pa.
4. 7.5 tons of I type furnace as claimed in claim 1,2 or 3 produces titanium sponge vacuum system, it is characterised in that: the steaming
Setting vacuum meter (16) between device (1) and threeway is evaporated, vacuum meter (16) are set between first manual valve (5) and the first tie point,
Vacuum meter (16) are set between third hand-operated valve (11) and the 4th Pneumatic baffle valve (12).
5. 7.5 tons of I type furnace as claimed in claim 4 produces titanium sponge vacuum system, it is characterised in that: the vacuum meter
It (16) is resistance-type vacuum gauge.
6. 7.5 tons of I type furnace as claimed in claim 1,2 or 3 produces titanium sponge vacuum system, it is characterised in that: described the
The model LGB150 of one screw pump (8) and the second screw pump (14), the model JZJ600 of lobe pump (13), oily booster pump
(10) model Z320.
7. 7.5 tons of I type furnace as claimed in claim 1,2 or 3 produces titanium sponge vacuum system, it is characterised in that: described the
The filter medium of one trap (4) is active carbon, and the filter medium of the second trap (9) is that partial size is less than 3mm titanium sponge.
8. 7.5 tons of I type furnace as claimed in claim 1,2 or 3 produces titanium sponge vacuum system, it is characterised in that: 7.5 tons of I
Type furnace produces the connection type of the pipeline of titanium sponge vacuum system are as follows: detachable flange form connection.
9. 7.5 tons of I type furnace as claimed in claim 7 produces titanium sponge vacuum system, it is characterised in that: detachable flange
The material of the gasket seal of formula connection is fluorine-containing nitrile rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910783529.8A CN110499430B (en) | 2019-08-23 | 2019-08-23 | Vacuum system for producing titanium sponge by 7.5 ton I-type furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910783529.8A CN110499430B (en) | 2019-08-23 | 2019-08-23 | Vacuum system for producing titanium sponge by 7.5 ton I-type furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110499430A true CN110499430A (en) | 2019-11-26 |
| CN110499430B CN110499430B (en) | 2022-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910783529.8A Active CN110499430B (en) | 2019-08-23 | 2019-08-23 | Vacuum system for producing titanium sponge by 7.5 ton I-type furnace |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5677381A (en) * | 1979-11-30 | 1981-06-25 | Anelva Corp | Exhaust system of dry etching unit |
| CN200996039Y (en) * | 2006-12-04 | 2007-12-26 | 遵义钛业股份有限公司 | Vacuum system for producing sponge titanium |
| CN201908799U (en) * | 2010-11-18 | 2011-07-27 | 金川集团有限公司 | Vacuumizing device |
| CN201915135U (en) * | 2010-12-13 | 2011-08-03 | 贵阳铝镁设计研究院有限公司 | Vacuum distillation system for titanium sponge production |
| CN206959566U (en) * | 2017-07-20 | 2018-02-02 | 河源正信硬质合金有限公司 | A kind of vacuum sintering furnace |
| CN110094967A (en) * | 2019-05-07 | 2019-08-06 | 株洲瑞德尔冶金设备制造有限公司 | A kind of vacuum drying oven using dry type screw pump |
-
2019
- 2019-08-23 CN CN201910783529.8A patent/CN110499430B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5677381A (en) * | 1979-11-30 | 1981-06-25 | Anelva Corp | Exhaust system of dry etching unit |
| CN200996039Y (en) * | 2006-12-04 | 2007-12-26 | 遵义钛业股份有限公司 | Vacuum system for producing sponge titanium |
| CN201908799U (en) * | 2010-11-18 | 2011-07-27 | 金川集团有限公司 | Vacuumizing device |
| CN201915135U (en) * | 2010-12-13 | 2011-08-03 | 贵阳铝镁设计研究院有限公司 | Vacuum distillation system for titanium sponge production |
| CN206959566U (en) * | 2017-07-20 | 2018-02-02 | 河源正信硬质合金有限公司 | A kind of vacuum sintering furnace |
| CN110094967A (en) * | 2019-05-07 | 2019-08-06 | 株洲瑞德尔冶金设备制造有限公司 | A kind of vacuum drying oven using dry type screw pump |
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| CN110499430B (en) | 2022-03-22 |
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Effective date of registration: 20230919 Address after: 617000 Taoyuan street, East District, Panzhihua, Sichuan Province, No. 90 Patentee after: PANGANG GROUP PANZHIHUA IRON & STEEL RESEARCH INSTITUTE Co.,Ltd. Patentee after: Chengdu advanced metal material industry technology Research Institute Co.,Ltd. Address before: 617000 Taoyuan street, East District, Panzhihua, Sichuan Province, No. 90 Patentee before: PANGANG GROUP PANZHIHUA IRON & STEEL RESEARCH INSTITUTE Co.,Ltd. |