CN105671311A - Processing method of iron ore - Google Patents
Processing method of iron ore Download PDFInfo
- Publication number
- CN105671311A CN105671311A CN201610039469.5A CN201610039469A CN105671311A CN 105671311 A CN105671311 A CN 105671311A CN 201610039469 A CN201610039469 A CN 201610039469A CN 105671311 A CN105671311 A CN 105671311A
- Authority
- CN
- China
- Prior art keywords
- iron ore
- magnetic separation
- iron
- intensity magnetic
- quartz sand
- Prior art date
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 91
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 45
- 238000003672 processing method Methods 0.000 title claims abstract description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 31
- 238000007885 magnetic separation Methods 0.000 claims abstract description 28
- 239000006004 Quartz sand Substances 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 17
- 230000009467 reduction Effects 0.000 claims abstract description 17
- 238000001914 filtration Methods 0.000 claims abstract description 16
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000012141 concentrate Substances 0.000 claims abstract description 15
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 12
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000003830 anthracite Substances 0.000 claims abstract description 12
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 12
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 claims abstract description 11
- 235000012538 ammonium bicarbonate Nutrition 0.000 claims abstract description 11
- 239000001099 ammonium carbonate Substances 0.000 claims abstract description 11
- 238000000926 separation method Methods 0.000 claims abstract description 6
- 239000007787 solid Substances 0.000 claims abstract description 6
- 238000005406 washing Methods 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims description 20
- 238000001035 drying Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 239000002253 acid Substances 0.000 abstract 2
- 235000013980 iron oxide Nutrition 0.000 abstract 2
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 abstract 2
- 238000002386 leaching Methods 0.000 abstract 2
- 239000002245 particle Substances 0.000 abstract 2
- 238000010791 quenching Methods 0.000 abstract 1
- 230000000171 quenching effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 17
- 230000008569 process Effects 0.000 description 8
- 235000012239 silicon dioxide Nutrition 0.000 description 7
- 239000000377 silicon dioxide Substances 0.000 description 7
- 150000002505 iron Chemical class 0.000 description 4
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- 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
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
- C22B3/06—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions, e.g. with acids generated in situ; in inorganic salt solutions other than ammonium salt solutions
- C22B3/08—Sulfuric acid, other sulfurated acids or salts thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
-
- 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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
-
- 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
Abstract
The invention relates to a processing method of iron ore, and belongs to the technical field of beneficiation. First, the iron ore and an anthracite reductant are crushed to the particle size of less than 2mm, then the iron ore and the anthracite reductant are mixed for reduction roasting, and reduction materials are obtained after reduction products are subjected to water quenching; second, the reduction materials are crushed to enable the reduction materials with the particle size of -0.074mm to account for 80%, then the reduction materials are subjected to low-intensity magnetic separation to obtain primary iron ore concentrate and low-intensity magnetic separation tailings, and afterwards, the low-intensity magnetic separation tailings are subjected to high-intensity magnetic separation to obtain secondary iron ore concentrate and quartz sand; third, the quartz sand is subjected to acid leaching in a sulfuric acid solution, and leachate is obtained by liquid-solid separation after acid leaching is completed; and fourth, ammonium bicarbonate is added into the obtained leachate which is then stirred, then filter residues are obtained after filtration washing, and iron oxides are obtained after the filter residues are dried and calcined at the temperature of 500 DEG C-700 DEG C for 20-50 min. The iron ore concentrates and the quartz sand are obtained by means of reduction roasting and magnetic separation of the iron ore, and the iron oxides of the medium grade are obtained after the quartz sand is processed.
Description
Technical field
The present invention relates to the processing method of a kind of iron mine, belong to technical field of beneficiation.
Background technology
In recent years, China's steel and iron industry demand to iron ore that grows continuously and fast is increasing, along with constantly riseing of International Iron Ore stone price, the utilization of domestic low-grade high silicon iron Ore increasingly comes into one's own, in addition China's iron ore reserves are characterized as being that lean ore is many, rich ore is few, low-grade high silicon iron ore reserve is big, has significantly high value of exploiting and utilizing. For the low silicon high grade iron concentrate that this low-grade high silicon iron Ore is produced by reduction roasting and magnetic separation process, if this high silicon iron Ore can be developed will there be very big realistic meaning. Prospect is also considerable, and the grade of ore is generally 33% ~ 39%, and silicone content is 38% ~ 345%.
Due to high containing silicon dioxide in iron ore, directly iron ore is added blast furnace to be equal to refuse to be sent into blast furnace, not only to take the space of blast furnace, and in order to remove silicon dioxide, also to put into the sludging flux of greater proportion, the reaction of slag making reaction or heat dissipation and heat absorption.
Therefore owing to the harm of silicon dioxide is big, if before steel-making and ironmaking, silicon dioxide is not removed, being greatly increased steel-making and the cost of ironmaking, at present, the method for domestic and international high-silicon iron ore desiliconization has: beneficiation method, chemical method, smelting process etc. Beneficiation method cost is high, and the response rate is low, and desiliconization rate is low; There is the problem of wastewater treatment in chemical method, and cost is high; Smelting process is mainly at blast furnace slag making, and cost is high.
The method that in prior art, also useful reduction roasting processes high-silicon iron ore, the present invention adopts the method for reduction roasting-water extraction-magnetic separation to process for high-silicon iron ore, and not only the temperature of reduction roasting decreases, and the response rate of ferrum and desiliconization rate all increase.
Summary of the invention
For above-mentioned prior art Problems existing and deficiency, the present invention provides the processing method of a kind of iron mine. This iron mine prepares iron ore concentrate and quartz sand through reduction roasting, magnetic separation, and quartz sand obtains medium grade iron oxide red through process, and the present invention is achieved through the following technical solutions.
The processing method of a kind of iron mine, it specifically comprises the following steps that
(1) first iron mine and anthracite reducing agent being crushed to granularity is below 2mm, then both mix homogeneously are obtained mixture, anthracite reducing agent accounts for the 6% ~ 12% of mixture quality, being reduction roasting 30 ~ 50min under 550 ~ 750 DEG C of conditions in temperature after being dried by mixture, reduzate obtains reducing material after shrend;
(2) reducing material that step (1) obtains is milled to-0.074mm and accounts for 80%, being then passed through magnetic field intensity is that 1500 ~ 2000Gs carries out low intensity magnetic separation, obtaining iron ore concentrate and low intensity magnetic separation mine tailing, low intensity magnetic separation mine tailing is that 10000 ~ 12000Gs carries out high intensity magnetic separation through magnetic field intensity, it is thus achieved that secondary iron ore concentrate and quartz sand;
(3) quartz sand step (2) obtained is that 1:0.2 ~ 0.5ml/g is placed in acidleach 2 ~ 4h in the sulfuric acid solution that concentration is 20 ~ 40wt% according to liquid-solid ratio, and after acidleach completes, solid-liquor separation obtains leachate;
(4) leachate that step (3) obtained adds ammonium hydrogen carbonate stirring 3 ~ 8min, and then filtration washing obtains filtering residue, and filtering residue is calcine 20 ~ 50min under 500 ~ 700 DEG C of conditions to obtain iron oxide red in temperature after drying.
In described step (4), the addition of ammonium hydrogen carbonate is that every liter of leachate adds 0.3 ~ 0.8mol.
The invention has the beneficial effects as follows:
(1) method of the present invention, roasting time is shorter, energy consumption is low, environmental protection, and desiliconization rate reaches about 80wt%, and iron recovery reaches about 80wt%, carry ferrum compared with beneficiation method less costly, and the iron oxide red of medium grade and the grade quartz sand at about 90%wt can be obtained.
Accompanying drawing explanation
Fig. 1 is present invention process flow chart A;
Fig. 2 is present invention process flow chart B.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Embodiment 1
As illustrated in fig. 1 and 2, the processing method of this iron mine, it specifically comprises the following steps that
(1) first iron mine (Ore material phase analysis: ferrum 38.56wt%, sulfur 0.051wt%, phosphorus 0.011wt%, silicon dioxide 45.36wt%) and anthracite reducing agent being crushed to granularity is below 2mm, then both mix homogeneously are obtained mixture, anthracite reducing agent accounts for the 12% of mixture quality, being reduction roasting 50min under 550 DEG C of conditions in temperature after being dried by mixture, reduzate obtains reducing material after shrend;
(2) reducing material that step (1) obtains is milled to-0.074mm and accounts for 80%, being then passed through magnetic field intensity is that 1500Gs carries out low intensity magnetic separation, obtaining iron ore concentrate and low intensity magnetic separation mine tailing, low intensity magnetic separation mine tailing is that 10000Gs carries out high intensity magnetic separation through magnetic field intensity, it is thus achieved that secondary iron ore concentrate and quartz sand;
(3) quartz sand step (2) obtained is that 1:0.2ml/g is placed in acidleach 2h in the sulfuric acid solution that concentration is 40wt% according to liquid-solid ratio, and after acidleach completes, solid-liquor separation obtains leachate;
(4) leachate step (3) obtained adds ammonium hydrogen carbonate stirring 8min, then filtration washing obtains filtering residue, filtering residue is calcine 20min under 700 DEG C of conditions to obtain iron oxide red in temperature after drying, and wherein the addition of ammonium hydrogen carbonate is that every liter of leachate adds 0.8mol.
The result that the present embodiment prepares is as shown in table 1.
Table 1(unit %)
。
Embodiment 2
As illustrated in fig. 1 and 2, the processing method of this iron mine, it specifically comprises the following steps that
(1) first iron mine (Ore material phase analysis: ferrum 38.56wt%, sulfur 0.051wt%, phosphorus 0.011wt%, silicon dioxide 45.36wt%) and anthracite reducing agent being crushed to granularity is below 2mm, then both mix homogeneously are obtained mixture, anthracite reducing agent accounts for the 6% of mixture quality, being reduction roasting 30min under 750 DEG C of conditions in temperature after being dried by mixture, reduzate obtains reducing material after shrend;
(2) reducing material that step (1) obtains is milled to-0.074mm and accounts for 80%, being then passed through magnetic field intensity is that 2000Gs carries out low intensity magnetic separation, obtaining iron ore concentrate and low intensity magnetic separation mine tailing, low intensity magnetic separation mine tailing is that 12000Gs carries out high intensity magnetic separation through magnetic field intensity, it is thus achieved that secondary iron ore concentrate and quartz sand;
(3) quartz sand step (2) obtained is that 1:0.5ml/g is placed in acidleach 4h in the sulfuric acid solution that concentration is 20wt% according to liquid-solid ratio, and after acidleach completes, solid-liquor separation obtains leachate;
(4) leachate step (3) obtained adds ammonium hydrogen carbonate stirring 3min, then filtration washing obtains filtering residue, filtering residue is calcine 50min under 500 DEG C of conditions to obtain iron oxide red in temperature after drying, and wherein the addition of ammonium hydrogen carbonate is that every liter of leachate adds 0.3mol.
The result that the present embodiment prepares is as shown in table 2.
Table 2(unit %)
。
Embodiment 3
As illustrated in fig. 1 and 2, the processing method of this iron mine, it specifically comprises the following steps that
(1) first iron mine (Ore material phase analysis: ferrum 38.56wt%, sulfur 0.051wt%, phosphorus 0.011wt%, silicon dioxide 45.36wt%) and anthracite reducing agent being crushed to granularity is below 2mm, then both mix homogeneously are obtained mixture, anthracite reducing agent accounts for the 10% of mixture quality, being reduction roasting 40min under 600 DEG C of conditions in temperature after being dried by mixture, reduzate obtains reducing material after shrend;
(2) reducing material that step (1) obtains is milled to-0.074mm and accounts for 80%, being then passed through magnetic field intensity is that 1800Gs carries out low intensity magnetic separation, obtaining iron ore concentrate and low intensity magnetic separation mine tailing, low intensity magnetic separation mine tailing is that 11000Gs carries out high intensity magnetic separation through magnetic field intensity, it is thus achieved that secondary iron ore concentrate and quartz sand;
(3) quartz sand step (2) obtained is that 1:0.3ml/g is placed in acidleach 3h in the sulfuric acid solution that concentration is 30wt% according to liquid-solid ratio, and after acidleach completes, solid-liquor separation obtains leachate;
(4) leachate step (3) obtained adds ammonium hydrogen carbonate stirring 6min, then filtration washing obtains filtering residue, filtering residue is calcine 30min under 600 DEG C of conditions to obtain iron oxide red in temperature after drying, and wherein the addition of ammonium hydrogen carbonate is that every liter of leachate adds 0.5mol.
The result that the present embodiment prepares is as shown in table 3.
Table 3(unit %)
Above in association with accompanying drawing, the specific embodiment of the present invention is explained in detail, but the present invention is not limited to above-mentioned embodiment, in the ken that those of ordinary skill in the art possess, it is also possible to make various change under the premise without departing from present inventive concept.
Claims (2)
1. the processing method of an iron mine, it is characterised in that specifically comprise the following steps that
(1) first iron mine and anthracite reducing agent being crushed to granularity is below 2mm, then both mix homogeneously are obtained mixture, anthracite reducing agent accounts for the 6% ~ 12% of mixture quality, being reduction roasting 30 ~ 50min under 550 ~ 750 DEG C of conditions in temperature after being dried by mixture, reduzate obtains reducing material after shrend;
(2) reducing material that step (1) obtains is milled to-0.074mm and accounts for 80%, being then passed through magnetic field intensity is that 1500 ~ 2000Gs carries out low intensity magnetic separation, obtaining iron ore concentrate and low intensity magnetic separation mine tailing, low intensity magnetic separation mine tailing is that 10000 ~ 12000Gs carries out high intensity magnetic separation through magnetic field intensity, it is thus achieved that secondary iron ore concentrate and quartz sand;
(3) quartz sand step (2) obtained is that 1:0.2 ~ 0.5ml/g is placed in acidleach 2 ~ 4h in the sulfuric acid solution that concentration is 20 ~ 40wt% according to liquid-solid ratio, and after acidleach completes, solid-liquor separation obtains leachate;
(4) leachate that step (3) obtained adds ammonium hydrogen carbonate stirring 3 ~ 8min, and then filtration washing obtains filtering residue, and filtering residue is calcine 20 ~ 50min under 500 ~ 700 DEG C of conditions to obtain iron oxide red in temperature after drying.
2. the processing method of iron mine according to claim 1, it is characterised in that: in described step (4), the addition of ammonium hydrogen carbonate is that every liter of leachate adds 0.3 ~ 0.8mol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610039469.5A CN105671311B (en) | 2016-01-21 | 2016-01-21 | A kind of processing method of iron ore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610039469.5A CN105671311B (en) | 2016-01-21 | 2016-01-21 | A kind of processing method of iron ore |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105671311A true CN105671311A (en) | 2016-06-15 |
| CN105671311B CN105671311B (en) | 2018-06-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610039469.5A Active CN105671311B (en) | 2016-01-21 | 2016-01-21 | A kind of processing method of iron ore |
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| Country | Link |
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| CN (1) | CN105671311B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106077034A (en) * | 2016-06-29 | 2016-11-09 | 杜建国 | A kind of processing method of Hainan stone basket check dam barren rock comprehensive utilization |
| CN109534476A (en) * | 2018-11-01 | 2019-03-29 | 昆明理工大学 | A kind of method that copper ashes handles arsenic in nonferrous smelting waste acid |
| CN110436528A (en) * | 2019-09-23 | 2019-11-12 | 中钢集团安徽天源科技股份有限公司 | A kind of preparation method of 9 based ferrite high-purity iron oxide red |
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| CN1995411A (en) * | 2006-12-26 | 2007-07-11 | 周云富 | Process for producing iron finished ore powder utilizing low grade siderite |
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| CN106077034A (en) * | 2016-06-29 | 2016-11-09 | 杜建国 | A kind of processing method of Hainan stone basket check dam barren rock comprehensive utilization |
| CN109534476A (en) * | 2018-11-01 | 2019-03-29 | 昆明理工大学 | A kind of method that copper ashes handles arsenic in nonferrous smelting waste acid |
| CN110436528A (en) * | 2019-09-23 | 2019-11-12 | 中钢集团安徽天源科技股份有限公司 | A kind of preparation method of 9 based ferrite high-purity iron oxide red |
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| Publication number | Publication date |
|---|---|
| CN105671311B (en) | 2018-06-05 |
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