CN1013102B - Method for producing iron oxide red from iron borne soot of steel smelting - Google Patents
Method for producing iron oxide red from iron borne soot of steel smeltingInfo
- Publication number
- CN1013102B CN1013102B CN 87106376 CN87106376A CN1013102B CN 1013102 B CN1013102 B CN 1013102B CN 87106376 CN87106376 CN 87106376 CN 87106376 A CN87106376 A CN 87106376A CN 1013102 B CN1013102 B CN 1013102B
- Authority
- CN
- China
- Prior art keywords
- iron
- iron oxide
- acid
- hour
- red
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 24
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 title abstract description 19
- 238000004519 manufacturing process Methods 0.000 title abstract description 17
- 229910000831 Steel Inorganic materials 0.000 title description 8
- 239000010959 steel Substances 0.000 title description 8
- 238000003723 Smelting Methods 0.000 title description 7
- 239000004071 soot Substances 0.000 title description 2
- 238000000034 method Methods 0.000 claims abstract description 19
- 239000000047 product Substances 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000009835 boiling Methods 0.000 claims abstract description 12
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 238000005406 washing Methods 0.000 claims abstract description 9
- 238000000498 ball milling Methods 0.000 claims abstract description 4
- 239000002253 acid Substances 0.000 claims description 19
- 238000001354 calcination Methods 0.000 claims description 16
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 11
- 238000000227 grinding Methods 0.000 claims description 6
- 230000018044 dehydration Effects 0.000 claims description 5
- 238000006297 dehydration reaction Methods 0.000 claims description 5
- 239000003500 flue dust Substances 0.000 claims description 5
- 239000003595 mist Substances 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 4
- 238000012216 screening Methods 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 3
- 150000002500 ions Chemical class 0.000 claims description 3
- 239000006210 lotion Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 2
- 239000012065 filter cake Substances 0.000 claims description 2
- 229910021653 sulphate ion Inorganic materials 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims 2
- 239000002244 precipitate Substances 0.000 claims 1
- 235000014347 soups Nutrition 0.000 claims 1
- 229920002994 synthetic fiber Polymers 0.000 claims 1
- 239000002994 raw material Substances 0.000 abstract description 11
- 239000000428 dust Substances 0.000 abstract description 7
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 4
- 239000012535 impurity Substances 0.000 abstract description 4
- 239000002440 industrial waste Substances 0.000 abstract description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 3
- 239000001301 oxygen Substances 0.000 abstract description 3
- 229910052760 oxygen Inorganic materials 0.000 abstract description 3
- 239000000049 pigment Substances 0.000 abstract description 2
- 238000009628 steelmaking Methods 0.000 abstract description 2
- 239000000779 smoke Substances 0.000 abstract 2
- 238000010306 acid treatment Methods 0.000 abstract 1
- 238000007664 blowing Methods 0.000 abstract 1
- 239000003638 chemical reducing agent Substances 0.000 abstract 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 abstract 1
- 229910000358 iron sulfate Inorganic materials 0.000 abstract 1
- YOBAEOGBNPPUQV-UHFFFAOYSA-N iron;trihydrate Chemical compound O.O.O.[Fe].[Fe] YOBAEOGBNPPUQV-UHFFFAOYSA-N 0.000 abstract 1
- 239000003517 fume Substances 0.000 description 6
- 235000013980 iron oxide Nutrition 0.000 description 6
- 239000011790 ferrous sulphate Substances 0.000 description 5
- 235000003891 ferrous sulphate Nutrition 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 238000012856 packing Methods 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 4
- 239000001054 red pigment Substances 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 238000010792 warming Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 239000001117 sulphuric acid Substances 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000001238 wet grinding Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/02—Oxides; Hydroxides
- C01G49/06—Ferric oxide [Fe2O3]
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Iron (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to a method for producing iron oxide red, which is characterized in that smoke dust from a steel making oxygen blowing open hearth is used as a raw material which is prepared into an iron oxide red product with good quality by the processes of concentrated sulfuric acid treatment, boiling reaction, step-by-step roasting, ball milling and water washing impurity removal, etc. Compared with the prior art, the present invention has the advantages of short production period, simplicity, practicability, industrial waste resource comprehensive utilization, sufficient raw materials and low cost; the cost is reduced by 50% of that of a traditional technology, the secondary pollution is avoided, and the obvious social and economic benefits can be obtained. Meanwhile, the iron-containing smoke dust synthesized by concentrated sulfuric acid in the technology can also be suitable for producing pigments of iron red, iron oxide black, iron yellow, iron blue, etc. and various iron sulfate products by a wet method under the condition that iron is used as a reducing agent.
Description
The present invention relates to a kind of is the novel method of raw material production red iron oxide with fume containing iron from steel smelting, belongs to the production of mineral dye.
The production method of red iron oxide substantially all adopts traditional iron and sulfuric acid synthesis method at present, comprises wet method and dry method.Promptly use iron and dilute sulphuric acid effect, generate FeSO
4Carry out liquid-phase oxidation (wet method) and calcined oxide (dry method).
As everyone knows, above-mentioned two kinds of production methods, technical process is long, and investment is many, and consumes a large amount of iron sheet raw materials, production cost height.
Along with the develop rapidly of Iron And Steel Industry, the fume containing iron from steel smelting pollution becoming serious.If these iron dust containings are captured, as the raw material of production red iron oxide, recycle industrial waste, can not only alleviate or eliminate environmental pollution, can also save the iron sheet raw material simultaneously, reduce the production cost of red iron oxide.Thereby for a new way has been opened up in the development of the comprehensive utilization of fume containing iron from steel smelting and pigment industry.
The external reported in literature of also producing red iron oxide relevant for the comprehensive utilization industrial waste.U.S. chemical abstract the 99th volume (publication in October nineteen eighty-three) is that CA 99 141573 has published about being raw material with the top-blown oxygen converter dust, adopts acidleach to remove major impurity CaO, prepares the concise and to the point report of iron oxide red pigment by atmospheric oxidation gained ferrous sulfate.In addition, it is raw material with the ferrous sulfate waste liquid that U.S. Pat 4261966 discloses a kind of, prepares red iron oxide by dehydration, calcining.This technical process is: to FeSO
4.7H
2O carries out partial dehydration, makes particulate state vitriol, divides the calcining of two steps, and 550-800 ℃ of the first step calcining temperature makes vitriol be converted into oxide compound, then washing.750-1000 ℃ of the second step calcining temperature pulverized calcined material at last and made the red iron oxide product.
The processing method of above-mentioned two production red iron oxides is that fume from steel making and ferrous sulfate waste liquid are raw material with industrial waste all, comprehensively reclaims, and turns waste into wealth.But weak point is arranged all on technology and equipment.U.S. chemical abstract 99 141573 is a raw material with the top-blown oxygen converter dust, adopt the acidleach removal of impurities, make the oxide compound of iron all be converted into ferrous sulfate, prepare iron oxide red pigment by the wet method atmospheric oxidation again, this technology not only acid consumption is big, and atmospheric oxidation speed is quite slow, and the production cycle is long, the production cost height.U.S. Pat 4261966 is to reclaim ferric oxide from the ferrous sulfate waste liquid, this technology calcining temperature is higher, and energy consumption is big, and a large amount of sulfurous gass that produce in the calcination process increase retrieving arrangement of still needing, otherwise sulfurous gas enters atmosphere, will cause the secondary pollution problem.
The objective of the invention is to seek a kind of processing method that fume containing iron from steel smelting prepares red iron oxide that fully utilizes, reduce production costs, eliminate or alleviate environmental pollution, produce high-quality iron oxide red pigment product.
Characteristics of the present invention are that to adopt the open hearth flue dust be raw material, and the single vitriol oil is handled, the recycling of acid mist and sulfurous gas, and step calcination at a lower temperature, ball milling, washing, screening, dehydration, oven dry, pulverizing promptly get the red iron oxide product.
The present invention realizes as follows.
The iron-containing dust that will capture by open hearth, directly with the vitriol oil of 75-90%, by dirt acid than being 1: 1.5-2.0 synthesizes in the groove in the acid that has agitator.Stirring reaction makes the ferric oxide dissolution transitions in its flue dust become Sulfates about 1 hour.A large amount of SO with synthetic a large amount of acid mists that produce of acid and calcining generation
3Gas adds an amount of steam and mixes, and imports in the boiling reactor with blower fan, and the speed that keeps the boiling reactor inlet air flow is at 0.3-3.5m/s, make iron-containing dust under boiling state with acid mist and SO
3React, partial oxidation iron becomes Sulfates.With sour building-up reactions thing and boiling reaction thing by 1: 0.5-1 is mixed into that to grind mix grinding in the grinding and mixing machine thin, at this moment, sour synthetic spent acid will continue with the boiling reaction thing in excessive open hearth flue dust react and be transformed into Sulfates.Material after grind the mixing charging tray of packing into places and carries out step calcination in muffle furnace, rotary kiln or the tunnel furnace, and the first step controlled temperature kept 2-4 hour under 400-500 ℃, mainly was the crystal water of sloughing in the vitriol; Second step continued to be warming up under 600-690 ℃, kept 8-10 hour, made the oxysalt of iron be decomposed into oxide compound, and made γ-Fe
2O
3Type changes α-Fe into
2O
3Type.For guaranteeing the granularity and the purity of red iron oxide product, product after at first will calcining adds suitable quantity of water and carries out ball milling in ball mill, levigate to reaching more than 98% less than 320 orders, then levigate material is carried out hot wash 3-5 time under 70-90 ℃, pH value 5-7 or check not sulphate-containing ion routinely to the washing lotion.The Ca of undecomposed solubility when mainly being the flush away calcining
+ 2, Mg
+ 2, AL
+ 3Deng Sulfates impurity.The slurries of throw out furnishing 16-20% after will washing again, through swirler or 320 meshes screen thin material, again through dehydration or filter cake.Place in stoving oven, dryer or the baking room under 110-300 ℃, dry to moisture content less than 1%.The cooling crushing packing promptly gets the iron oxide red product.
Accompanying drawing: fume containing iron from steel smelting technological process of production figure.
Implement example of the present invention below in conjunction with description of drawings.
At first put into less water in the synthetic groove [3] of acid, with slowly impouring of the vitriol oil [1], being diluted to acidity is 80%, under agitation condition, presses dirt acid than 1: 1.7(kg/kg) drop into iron content open hearth flue dust [2], stirring reaction 1 hour then.With sour building-up reactions acid mist that produces and the SO that calcines generation
3Gas adds an amount of vapor mixing, is that 1m/s imports boiling reactor [4] with the flow velocity with blower fan, keeps 8-10 hour under boiling state with the iron-containing dust that drops into simultaneously in the reactor [4].Sour building-up reactions thing [5] and boiling reaction thing [6] were mixed by 1: 0.8, enter in the grinding and mixing machine [7] and grind mixed.Grind to mix back material [8] charging tray of packing into and insert in the muffle furnace [9], begin to be warming up to 500 ℃, kept 4 hours, continue to be warming up to 690 ℃, kept 10 hours.Calcining material [10] is treated to send in the ball mill [11] after cold slightly, adds water and carries out wet ball mill to 320 order and account for more than 98%.Wet-milling material [12] is sent in the washing bath [13], add entry at 1: 2 by solid-to-liquid ratio, feed steam 80 ℃ of following repetitive scrubbings 3-5 time, to water lotion sulfate radical-free ion, discard waste liquid [14], water washing and precipitating is added the slurries [15] that water transfers to 16-20% again, carry out screening and separating with slush pump importing swirler or screen cloth [16], discard larger particles cull [17], particle diameter is entered water extracter [19] less than 320 purpose slurries [18] through precipitation to dewater and obtains thin material [20], the charging tray of packing into places in the stoving oven [21], under 250 ℃, dry to moisture content less than 1%.Oven dry material [22] is to be cooled, pulverizes through pulverizer [23], and packing promptly gets red iron oxide product [24].Its product analysis the results are shown in Table.
The present invention compared with prior art has following advantage: the SO that produces in acid mist that sour building-up reactions produces and spent acid and the calcination process is fully recycled in this technical process
3Gas, acid consumption is little, and has avoided secondary pollution.Calcining temperature is low, and energy consumption is few, so production cost is lower, quality product is still excellent, can obtain significant environment, society and economic benefit.
Red iron oxide product analysis result
The index technical indicator
Product
Project first grade seconds
Coloured light approximate one is a little little
Oil number % 13-20 13-20 13-15
320 mesh screen residues are not more than 0.2 0.5 0.15-0.40
Water extract pH value 5-7 5-7 6.0-6.7
The water solubles is not more than % 12 0.08-0.40
Purity Fe
2O
3% is not less than 75 65 96.0-98.2
Covering is made every effort to overcome/rice
2Be not more than 10 10 7-5
Water content is not more than % 1 1.5 0.16-0.41
Claims (5)
1, a kind ofly handle the open hearth flue dust and prepare the method for red iron oxide, it is characterized in that with concentrated acid, adopt the 75-90% vitriol oil by dirt acid than being 1: 1.5-2.0, stirring reaction 1 hour is with the SO of synthetic acid mist that produces of acid and calcining generation
3Gas and an amount of steam import boiling reactor with the 0.3-3.5m/s flow velocity, iron content dirt was reacted 8-10 hour under boiling, with the synthetic material of acid and boiling reaction thing by 1: 0.5-1.0 in grinding and mixing machine, grind be mixed even, step calcination then, the first step controlled temperature is 400-500 ℃, 2-4 hour, the second step controlled temperature is 600-690 ℃, 8-10 hour, last fine grinding, washing, screening, dehydration, oven dry and make product.
2, method according to claim 1 is characterized in that fine grinding wherein adopts wet ball-milling, levigate to 320 orders greater than 98%.
3, method according to claim 1, it is characterized in that wherein washing be with levigate material 70-90 ℃ of following hot wash 3-5 time, checking in the water lotion not sulphate-containing ion or PH routinely is 5-7.
4, method according to claim 1 is characterized in that wherein screening is to adopt soup compound after swirler or screen cloth will be washed to carry out rotational flow sorting or sieve, with the isolate particle diameter less than the thin material of 320 orders precipitate dewater filter cake.
5, according to the described method of claim 1, it is characterized in that oven dry wherein can adopt drying plants such as dryer, baking room or drying kiln, under 110-300 ℃, dry to moisture content less than 1%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87106376 CN1013102B (en) | 1987-09-14 | 1987-09-14 | Method for producing iron oxide red from iron borne soot of steel smelting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87106376 CN1013102B (en) | 1987-09-14 | 1987-09-14 | Method for producing iron oxide red from iron borne soot of steel smelting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1031985A CN1031985A (en) | 1989-03-29 |
| CN1013102B true CN1013102B (en) | 1991-07-10 |
Family
ID=4815673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87106376 Expired CN1013102B (en) | 1987-09-14 | 1987-09-14 | Method for producing iron oxide red from iron borne soot of steel smelting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1013102B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1322067C (en) * | 2005-06-08 | 2007-06-20 | 刘世琦 | Method for producing iron oxide black |
| CN101804350A (en) * | 2009-02-13 | 2010-08-18 | 北京三聚环保新材料股份有限公司 | Preparation method for ferric oxide used for carrier |
| CN105152224B (en) * | 2015-08-04 | 2017-01-18 | 江苏省冶金设计院有限公司 | Method and system for processing red mud |
-
1987
- 1987-09-14 CN CN 87106376 patent/CN1013102B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1031985A (en) | 1989-03-29 |
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