CN106367554A - Method for extracting iron and valuable metal from secondary resources and producing slag wool - Google Patents
Method for extracting iron and valuable metal from secondary resources and producing slag wool Download PDFInfo
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- CN106367554A CN106367554A CN201610770443.8A CN201610770443A CN106367554A CN 106367554 A CN106367554 A CN 106367554A CN 201610770443 A CN201610770443 A CN 201610770443A CN 106367554 A CN106367554 A CN 106367554A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/14—Multi-stage processes processes carried out in different vessels or furnaces
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/04—Manufacture of glass fibres or filaments by using centrifugal force, e.g. spinning through radial orifices; Construction of the spinner cups therefor
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/10—Making spongy iron or liquid steel, by direct processes in hearth-type furnaces
- C21B13/105—Rotary hearth-type furnaces
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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
- Y02P10/20—Recycling
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a method for extracting iron and valuable metal from secondary resources and producing slag wool. The secondary resources containing iron are broken, screened, briquetted and dried and then are conveyed to a rotary hearth furnace to be subject to prereduction, the secondary resources are fed and charged into a one-time melt separation electric furnace in a hot manner to be subject to secondary reduction, a reduction product is subject to slag and iron separation, hot-state furnace slag is poured out of the one-time melt separation furnace to a secondary melt separation quenching and tempering furnace to be subject to re-melt separation and quenching and tempering, and qualified pig iron poured out of the one-time melt separation furnace is subject to direct cast iron or is provided for the steel melting working procedure; qualified slag formed by the secondary melt separation quenching and tempering furnace is fed to a centrifugal fiber forming slag wool machine in a hot manner to produce qualified slag wool; unqualified furnace slag containing iron is left and subject to multi-furnace operation, and the slag is poured to the one-time melt separation furnace in a hot-state manner to continue to being subject to melt-separation reduction. The rotary hearth furnace prereduction, two-step melt separation and quenching and tempering temperature control technology is utilized, hot-state furnace slag is directly used for producing slag wool while valuable metal is recycled, the metal recovery rate is high, the produced slag wool is good in quality, and in the technology process, a device can achieve seamless connection.
Description
Technical field
The present invention relates to iron content secondary resource field of comprehensive utilization, it is related specifically to a kind of iron-holder relatively low, containing other
In the secondary resource of useful metal while synchronous recovery ferrum, nickel, chromium, the method producing slag wool.
Background technology
At present, produce mineral wool both at home and abroad or the technique of slag wool mainly uses basalt, coke, adjusting material etc. in furnace cupola
Or heat melting in electric furnace, slag is centrifuged into fibre, then makes mineral wool system through operations such as machine-shaping, solidification and cuttings again
Product.Significantly shortcoming is using natural resourcess and coke in this way, and energy consumption is of a relatively high.Even if utilizing secondary resource
Test, furnace cupola technique do not lack coke yet, and high energy consumption issues also still exist.
Also utilize secondary resource both at home and abroad, such as Bayer process red mud melts point stove and melts through rotary hearth furnace prereduction and heat accumulating type and divides,
The technique that slag is made slag wool.Because Bayer process red mud is higher containing sodium oxide, potassium oxide, molten point of reduction is acid slag again, molten
To furnace bottom, lining wear phase under the plyability vigorous erosion slag high temperature such as the acid slag in point stove, high basic metal slag, high oxidation ferrous iron
When serious.Meanwhile, melting a point stove has weak oxide atmosphere (tail gas oxygen content 8%～16%), leads to tfe in slag > 3.5%
(universal, tfe > 5%), wherein contain the metallic iron more than 0.5%, slag wool quality had a strong impact on.
Also there is the prereduction in rotary kiln using red mud both at home and abroad, hot-bulb is rolled into a ball and adds electric furnace melting slag ferrum, slag is made
The patented technology of slag wool.Red mud iron content is low, sio2、tio2、al2o3Higher Deng impurity, it is difficult to reduce.Especially Bayer process red mud
Alkali metal containing is high, is more easy to ring formation in rotary kiln, and reducing degree is subject to temperature limiting, because solid carbon direct-reduction is restricted
Link is temperature, so substantial amounts of ferrous oxide needs to reduce further in electric furnace, increases furnace operation burden and difficulty, leads
Send a telegraph slag and contain feo up to 3%～15%, have a strong impact on slag wool quality.
Content of the invention
Present invention aims to deficiency of the prior art, provide and in a kind of secondary resource, extract ferrum and useful gold
The method belonging to and producing slag wool, to solve the above problems.
Technical problem solved by the invention can employ the following technical solutions to realize:
Extract ferrum and useful metal and the method producing slag wool in a kind of secondary resource, comprise the following steps:
Step one: after broken for the secondary resource of iron content, screening, preliminary drying dry-cure, classified storage is in feed bin, and adds
Dispensing is mixed；
Step 2: mixed secondary resource is formed pelletizing or briquetting by agglomeration process；
Step 3: ball block is sent into drying oven, and is dried using reuse rotary hearth furnace waste gas；
Step 4: the qualified ball that form step 3 or block are sent in rotary hearth furnace, preheated, reduction generate qualified pre- also
Original product；
Step 5: prereduction product hot charging is carried out molten point of reduction in once molten point of stove, and slag is carried out to reduzate
Ferrum separates, first from once melt a point stove pour out thermal slag to a secondary molten point hardening and tempering furnace melted again point with quenched；Again from once
Qualified pig iron direct cast iron that molten point of stove pours out or be supplied to steel making working procedure；
Step 6: the molten point of qualified slag heat that hardening and tempering furnace is formed secondary in step 5 is delivered to and is centrifuged into fine slag wool machine production conjunction
Lattice slag wool；Underproof stay in secondary molten point of hardening and tempering furnace containing iron blast furnace slag some furnace rear of slag hot topple over back once melt a point stove continuation
Molten point of reduction.
Further, described secondary resource includes red mud, containing in the mine tailing of siderochrome, Stainless steelmaking dust, lateritic nickel ore
Plant or several；Dispensing includes one or more of binding agent, flux, reducing agent.
Further, the described point stove that once melts has the function of supplementary reducing agent；In step 5, prereduction product is from turning bottom
Stove hot charging is to temperature >=700 DEG C once melted when dividing stove.
Further, a described secondary molten point hardening and tempering furnace has interpolation adjusting material, the function of homoiothermic, control composition and temperature；
From once melting the slag temperature that point stove is poured into the thermal slag of secondary molten point of hardening and tempering furnace in step 5 > 1250 DEG C, by once
The ferrum at least 90% that molten point of stove is reduced by cast iron after separation or is supplied to steel making working procedure.
Further, underproof in described step 6 slag 3～5 furnace rear is stayed to incline containing iron blast furnace slag in secondary molten point of hardening and tempering furnace
Subcontract hot being transmitted back in pouring into and once melt a point stove.
Further, in described step 6, qualified slag heat is delivered to high speed centrifugation and becomes cotton machine to produce mineral wool fiber, and qualified slag enters
Enter the high-temperature fusant temperature that high speed centrifugation becomes cotton machine>1400 DEG C, enter the high-temperature fusant temperature fluctuation<50 that high speed centrifugation becomes cotton machine
DEG C, enter high speed centrifugation and become the high-temperature fusant quality fluctuation of cotton machine < 10kg/min enters high speed centrifugation and becomes the high-temperature fusant of cotton machine
Composition fluctuation < 1%, wherein iron oxide content < 1.5%.
Compared with prior art, beneficial effects of the present invention are as follows:
Effectively utilizes ore deposit containing Fe compound type secondary resource of the present invention, sends into rotary hearth furnace after broken, screening, briquetting, drying
Carry out prereduction, then hot delivery and hot charging carries out secondary reduction, recovery useful metal to once melting a point electric furnace, tentatively completes slag, gold
After separating, heat delivers to a secondary molten point of hardening and tempering furnace, further reduction, homoiothermic, quenched, and qualified slag melt entrance high speed centrifugation becomes cotton
Mineral wool fiber made by machine, obtains superior in quality slag wool product, residual metallic recycling.Whole process runs through hot and connects and useless
Pick up the heat technique, reduces production process energy consumption, realizes process energy consumption minimumization.Meanwhile, divide and homogenize using secondary melting
Technology, makes the abundant Reduced separating of the useful element composition such as ferrum, improves slag wool quality.Solve the comprehensive utilization of part Bayer process red mud
Problem, reclaim Stainless steelmaking dust or slag and utilization be containing chromium, thin mine tailing of ferrum etc., energy-conservation and environmental protection.The present invention is using turning bottom
Stove technology, electric furnace two step melts divides and quenched, temperature control technique, it is to avoid compound resource prereduction technology bottleneck, synchronous recovery ferrum,
While nickel, chromium, thermal slag is directly produced the technology field of slag wool it is achieved that the secondary resource such as iron content, chromium, nickel is efficiently sharp
With metal recovery rate is high, and the slag wool quality producing is good.Meanwhile, process process equipment coupling is reasonable, thus it is seamless to realize production capacity
Linking.
Brief description
Fig. 1 is the technological process extracted ferrum and useful metal in secondary resource of the present invention and produce the method for slag wool
Figure.
Specific embodiment
Technological means, creation characteristic, reached purpose and effect for making the present invention realize are easy to understand, with reference to
Specific embodiment, is expanded on further the present invention.
Referring to Fig. 1, in a kind of secondary resource of the present invention, extract ferrum and useful metal and the method producing slag wool, bag
Include following steps:
Step one: by the secondary resource of the iron content of the useful metal such as tfe15%～45% and other ferrum, chromium, nickel, such as red
Mud, the mine tailing containing siderochrome, Stainless steelmaking dust, lateritic nickel ore etc., cannot economically apply in other conventional processes, through crushing,
The operations such as prebake (make reach screening require), screening process after classified storage in feed bin, add dispensing and by being pre-selected
Technique carry out dispensing, mixing.Dispensing includes one or more of binding agent, flux, reducing agent.
Step 2: mixed secondary resource is formed pelletizing or briquetting by agglomeration process, optional according to raw material physical property
Select the technique such as pressure ball or disk pelletizing.
Step 3: the ball block having made block is sent into drying oven, and is dried using reuse rotary hearth furnace waste gas.
Step 4: the qualified green-ball that form step 3 or block are wired in rotary hearth furnace through distributing device, preheated, reduction generates
Qualified prereduction product.General reduction degree reaches more than 80%, is determined according to its economical operation condition.In rotary hearth furnace work
Its process used heat is reclaimed during work.
Step 5: prereduction product hot charging is carried out molten point of reduction in once molten point of stove, to also original after reducing fully
Thing carries out slag sluicing system.First from once melt a point stove pour out thermal slag to a secondary molten point hardening and tempering furnace melted again point with quenched；
Again from once melting the qualified pig iron direct cast iron that point stove pours out or be supplied to the next procedures such as steel-making.
Step 6: will be qualified in setting value to secondary in step 5 molten point of slag composition that hardening and tempering furnace is formed, temperature stabilization
Slag directly deliver to and be centrifuged into fine slag wool machine and produce qualified slag wool by heat.Qualified slag wool is to enter the slag temperature being centrifuged in fine slag wool machine
Degree fluctuation < 50 DEG C, mass flow fluctuation < 10kg/min, composition fluctuation < 1%.A small amount of gold of secondary molten point of hardening and tempering furnace bottom sedimentation
Belong to and slag, can be retained in secondary molten point of hardening and tempering furnace, when retaining 3～5 furnace rear, in being poured into, subcontract hot being transmitted back to one
Secondary molten point of reduction of molten point of stove continuation, makes a small amount of residual ferrum, is divided by melting again, reach and be sufficiently separated.Can according to reduction situation can
Adjustment stove number.
Once melting point stove has the function of supplementary reducing agent；In step 5 prereduction product from rotary hearth furnace hot charging to once melting
Divide temperature >=700 DEG C during stove, partial reduction agent can be supplemented as needed.
A secondary molten point hardening and tempering furnace has the functions such as interpolation adjusting material, homoiothermic, control composition and temperature.From once in step 5
Molten point of stove is directly entered the slag temperature of the thermal slag of secondary molten point of hardening and tempering furnace > 1250 DEG C.Once melt the reduzate of point stove
Topple over by the rule going out metal afterwards of first slagging tap and separate, the metal being wherein reduced at least 90% by ingot casting after separation or direct provides
To other operation such as steel-making.
In step 6, qualified slag heat is delivered to high speed centrifugation and becomes cotton machine to produce mineral wool fiber, and qualified slag enters high speed centrifugation and becomes cotton
The high-temperature fusant temperature of machine>1400 DEG C, enter the high-temperature fusant temperature fluctuation<50 DEG C that high speed centrifugation becomes cotton machine, enter at a high speed from
The heart become cotton machine high-temperature fusant quality fluctuation < 10kg/min, enter high speed centrifugation become the high-temperature fusant composition of cotton machine fluctuate < 1%,
Wherein iron oxide content < 1.5%.
Specific embodiment one
Bayer process red mud (iron content 25%～32%), binding agent (bentonite, with addition of amount about 3%), flux (quick lime), also
Former dose (coal dust) etc., after processing through operations such as prebake, broken, screenings classified storage in feed bin, by the technique being pre-selected
Carry out dispensing, mixing.Subsequently into ball press technique, it is dried using reuse rotary hearth furnace waste gas after pressing ball, qualified green-ball warp
Distributing device is wired in rotary hearth furnace, and preheated, multistage reduction generates qualified prereduction product, and reduction degree reaches more than 85%.Will
Its hot charging (temperature >=750 DEG C) is in once molten point of stove, and supplements a small amount of reducing agent.Slag sluicing system after reduction fully, first topples over
Slag tap and melted again point and quenched to a secondary molten point of hardening and tempering furnace, a small amount of residual Tie Tong crosses to melt again and divides, and reaches and is sufficiently separated.Qualified
Slag (slag composition, temperature stabilization are in setting value, wherein feo% < 1.5%) directly heat deliver to be centrifuged into fine slag wool machine produce qualified
Slag wool (entrance is centrifuged into the slag temperature fluctuation < 50 DEG C in fine slag wool machine, mass flow fluctuation < 10kg/min, composition fluctuation <
1%), a small amount of slag 3～5 furnace rear can be stayed to topple over back once containing iron blast furnace slag to melt point stove continue molten point.Once melt a point stove to pour out
Qualified pig iron direct cast iron or the next procedure such as supply steel-making, the response rate of ferrum can reach more than 95%.
Specific embodiment two
Cr will be contained2o338%～50%, the mine tailing containing tfe 9%～20% (is not suitable for being directly used in traditional electric furnace
Ferrochrome smelting technique), binding agent (bentonite, with addition of amount about 4%), reducing agent (coke powder, about 7%) etc., through works such as broken, screenings
After sequence process, classified storage, in feed bin, carries out dispensing, mixing by the technique being pre-selected.Subsequently into ball press technique, press
It is dried using reuse rotary hearth furnace waste gas after ball.Qualified green-ball is wired in rotary hearth furnace through distributing device, and preheated, multistage is also primary
Become qualified prereduction product (chromium reduction degree reaches 50%, and ferrum reduction degree reaches 80%).Its hot charging (temperature >=750 DEG C) is arrived
Once melt in point stove, a small amount of reducing agent can be supplemented.Slag sluicing system after reduction fully, first toppling over slags tap enters to a secondary molten point hardening and tempering furnace
Row melts and divides and quenched, and a small amount of residual Tie Tong crosses molten point again, reaches and is sufficiently separated.(slag composition, temperature stabilization exist qualified slag
Setting value, wherein cr2o3 < 0.5%, feo be 0.5%～1.5%) directly heat deliver to and be centrifuged into fine slag wool machine and produce qualified slag wool
(the slag temperature fluctuation < 50 DEG C in entrance centrifugation fiberizer, mass flow fluctuation < 10kg/min, and composition fluctuation < 1%), on a small quantity
Slag 3～5 furnace rear can be stayed to topple over back once containing iron blast furnace slag to melt point stove and continue molten point.Once melt the qualified pig iron that point stove pours out
The next procedure such as direct cast iron or supply steel-making.
Ultimate principle and principal character and the advantages of the present invention of the present invention have been shown and described above.The technology of the industry
, it should be appreciated that the present invention is not restricted to the described embodiments, the simply explanation described in above-described embodiment and description is originally for personnel
The principle of invention, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, these changes
Change and improvement both falls within scope of the claimed invention.Claimed scope by appending claims and its
Equivalent thereof.
Claims (6)
1. in a kind of secondary resource, extract ferrum and useful metal and the method producing slag wool it is characterised in that: comprise the following steps:
Step one: after broken for the secondary resource of iron content, screening, preliminary drying dry-cure, classified storage is in feed bin, and adds dispensing
Mixed；
Step 2: mixed secondary resource is formed pelletizing or briquetting by agglomeration process；
Step 3: ball block is sent into drying oven, and is dried using reuse rotary hearth furnace waste gas；
Step 4: the qualified ball that form step 3 or block are sent in rotary hearth furnace, and preheated, reduction generates qualified prereduction and produces
Product；
Step 5: prereduction product hot charging is carried out molten point of reduction in once molten point of stove, and carries out slag iron to reduzate dividing
From, first from once melt a point stove pour out thermal slag to a secondary molten point hardening and tempering furnace melted again point with quenched；Again from once molten point
Qualified pig iron direct cast iron that stove pours out or be supplied to steel making working procedure；
Step 6: the molten point of qualified slag heat that hardening and tempering furnace is formed secondary in step 5 is delivered to and is centrifuged into the fine slag wool machine qualified slag of production
Cotton；Underproof stay in secondary molten point of hardening and tempering furnace containing iron blast furnace slag some furnace rear of slag hot topple over back once melt point stove and continue molten dividing
Reduction.
2. extract ferrum and useful metal and the method producing slag wool in secondary resource according to claim 1, its feature exists
In: described secondary resource includes one or more of red mud, the mine tailing containing siderochrome, Stainless steelmaking dust, lateritic nickel ore；Dispensing bag
Include one or more of binding agent, flux, reducing agent.
3. extract ferrum and useful metal and the method producing slag wool in secondary resource according to claim 1, its feature exists
In: the described point stove that once melts has the function of supplementary reducing agent；In step 5 prereduction product from rotary hearth furnace hot charging to once melting
Divide temperature >=700 DEG C during stove.
4. extract ferrum and useful metal and the method producing slag wool in secondary resource according to claim 1, its feature exists
In: described secondary molten point of hardening and tempering furnace has the function of adding adjusting material, homoiothermic, control composition and temperature；From once in step 5
Molten point of stove is poured into the slag temperature of the thermal slag of secondary molten point of hardening and tempering furnace > 1250 DEG C, by once melting what point stove was reduced
Ferrum at least 90% by cast iron after separation or is supplied to steel making working procedure.
5. extract ferrum and useful metal and the method producing slag wool in secondary resource according to claim 1, its feature exists
In: it is underproof in described step 6 that to stay slag 3～5 furnace rear to subcontract in being poured into containing iron blast furnace slag in secondary molten point of hardening and tempering furnace hot
It is transmitted back to and once melt a point stove.
6. extract ferrum and useful metal and the method producing slag wool in secondary resource according to claim 1, its feature exists
In: in described step 6, qualified slag heat is delivered to high speed centrifugation and becomes cotton machine to produce mineral wool fiber, and qualified slag enters high speed centrifugation and becomes cotton
The high-temperature fusant temperature of machine>1400 DEG C, enter the high-temperature fusant temperature fluctuation<50 DEG C that high speed centrifugation becomes cotton machine, enter at a high speed from
The heart become cotton machine high-temperature fusant quality fluctuation < 10kg/min, enter high speed centrifugation become the high-temperature fusant composition of cotton machine fluctuate < 1%,
Wherein iron oxide content < 1.5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610770443.8A CN106367554B (en) | 2016-08-30 | 2016-08-30 | Iron and useful metal and the method for producing slag wool are extracted in a kind of secondary resource |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610770443.8A CN106367554B (en) | 2016-08-30 | 2016-08-30 | Iron and useful metal and the method for producing slag wool are extracted in a kind of secondary resource |
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| CN106367554A true CN106367554A (en) | 2017-02-01 |
| CN106367554B CN106367554B (en) | 2018-05-29 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107354583A (en) * | 2017-07-10 | 2017-11-17 | 洛阳光正金属技术服务有限公司 | The high-valued comprehensive utilization process of dead catalyst slag |
| CN110172539A (en) * | 2019-06-19 | 2019-08-27 | 上海科麟沃环境科技有限公司 | Iron content red mud recovery method, rock wool preparation method and corresponding rock wool |
| CN111893308A (en) * | 2020-09-01 | 2020-11-06 | 中南大学 | Method for comprehensively utilizing red mud without tailings |
| CN114411042A (en) * | 2021-12-21 | 2022-04-29 | 东北大学 | Method for preparing high-nickel high-chromium iron alloy |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1052837A (en) * | 1989-12-25 | 1991-07-10 | 夏抒 | Directly be cut and produce the technology of mineral cotton with the molten state ore deposit |
| CN103627835A (en) * | 2013-11-12 | 2014-03-12 | 金川集团股份有限公司 | Method for treating nickel smelting furnace slag |
| CN104694758A (en) * | 2015-03-13 | 2015-06-10 | 宝钢发展有限公司 | Technique for comprehensively utilizing iron-containing dust mud |
-
2016
- 2016-08-30 CN CN201610770443.8A patent/CN106367554B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1052837A (en) * | 1989-12-25 | 1991-07-10 | 夏抒 | Directly be cut and produce the technology of mineral cotton with the molten state ore deposit |
| CN103627835A (en) * | 2013-11-12 | 2014-03-12 | 金川集团股份有限公司 | Method for treating nickel smelting furnace slag |
| CN104694758A (en) * | 2015-03-13 | 2015-06-10 | 宝钢发展有限公司 | Technique for comprehensively utilizing iron-containing dust mud |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107354583A (en) * | 2017-07-10 | 2017-11-17 | 洛阳光正金属技术服务有限公司 | The high-valued comprehensive utilization process of dead catalyst slag |
| CN110172539A (en) * | 2019-06-19 | 2019-08-27 | 上海科麟沃环境科技有限公司 | Iron content red mud recovery method, rock wool preparation method and corresponding rock wool |
| CN111893308A (en) * | 2020-09-01 | 2020-11-06 | 中南大学 | Method for comprehensively utilizing red mud without tailings |
| CN114411042A (en) * | 2021-12-21 | 2022-04-29 | 东北大学 | Method for preparing high-nickel high-chromium iron alloy |
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| Publication number | Publication date |
|---|---|
| CN106367554B (en) | 2018-05-29 |
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