CN104073630A - Iron base carbonaceous pellet using waste plastics as carbon source and preparation method of iron base carbonaceous pellet - Google Patents
Iron base carbonaceous pellet using waste plastics as carbon source and preparation method of iron base carbonaceous pellet Download PDFInfo
- Publication number
- CN104073630A CN104073630A CN201410348368.7A CN201410348368A CN104073630A CN 104073630 A CN104073630 A CN 104073630A CN 201410348368 A CN201410348368 A CN 201410348368A CN 104073630 A CN104073630 A CN 104073630A
- Authority
- CN
- China
- Prior art keywords
- iron
- pelletizing
- plastic waste
- containing substrates
- waste
- 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.)
- Granted
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 227
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 114
- 239000002699 waste material Substances 0.000 title claims abstract description 39
- 229920003023 plastic Polymers 0.000 title claims abstract description 33
- 239000004033 plastic Substances 0.000 title claims abstract description 33
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 23
- 239000008188 pellet Substances 0.000 title abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 59
- -1 polypropylene Polymers 0.000 claims abstract description 38
- 239000002994 raw material Substances 0.000 claims abstract description 30
- 239000004743 Polypropylene Substances 0.000 claims abstract description 19
- 229920001707 polybutylene terephthalate Polymers 0.000 claims abstract description 19
- 229920000139 polyethylene terephthalate Polymers 0.000 claims abstract description 19
- 229920001155 polypropylene Polymers 0.000 claims abstract description 19
- 239000005020 polyethylene terephthalate Substances 0.000 claims abstract description 16
- 239000004417 polycarbonate Substances 0.000 claims abstract description 11
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000004793 Polystyrene Substances 0.000 claims abstract description 10
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical group C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229920000515 polycarbonate Polymers 0.000 claims abstract description 10
- 238000005453 pelletization Methods 0.000 claims description 92
- 239000013502 plastic waste Substances 0.000 claims description 71
- 239000000758 substrate Substances 0.000 claims description 43
- 238000000034 method Methods 0.000 claims description 21
- 239000004698 Polyethylene Substances 0.000 claims description 18
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 claims description 18
- 229920000573 polyethylene Polymers 0.000 claims description 18
- 230000008569 process Effects 0.000 claims description 14
- 230000009467 reduction Effects 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 11
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 claims description 9
- 150000001408 amides Chemical class 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims description 7
- 150000001875 compounds Chemical class 0.000 claims description 6
- 239000003245 coal Substances 0.000 abstract description 9
- 238000001035 drying Methods 0.000 abstract description 3
- 238000002156 mixing Methods 0.000 abstract 2
- 239000004952 Polyamide Substances 0.000 abstract 1
- 238000001354 calcination Methods 0.000 abstract 1
- 239000012994 photoredox catalyst Substances 0.000 abstract 1
- 229920002647 polyamide Polymers 0.000 abstract 1
- 229920002223 polystyrene Polymers 0.000 abstract 1
- 229920002554 vinyl polymer Polymers 0.000 abstract 1
- 238000005303 weighing Methods 0.000 abstract 1
- 230000002829 reductive effect Effects 0.000 description 17
- 239000002893 slag Substances 0.000 description 17
- 238000003723 Smelting Methods 0.000 description 16
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 14
- 239000003795 chemical substances by application Substances 0.000 description 13
- 238000004519 manufacturing process Methods 0.000 description 10
- 239000011148 porous material Substances 0.000 description 8
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 7
- 229910052804 chromium Inorganic materials 0.000 description 7
- 239000011651 chromium Substances 0.000 description 7
- 229910052802 copper Inorganic materials 0.000 description 7
- 239000010949 copper Substances 0.000 description 7
- 229910052759 nickel Inorganic materials 0.000 description 7
- 239000011230 binding agent Substances 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 5
- 238000011946 reduction process Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 239000010802 sludge Substances 0.000 description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 3
- 239000002817 coal dust Substances 0.000 description 3
- 239000004567 concrete Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 241000264877 Hippospongia communis Species 0.000 description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 2
- 239000003575 carbonaceous material Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000003746 solid phase reaction Methods 0.000 description 2
- 238000010671 solid-state reaction Methods 0.000 description 2
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 150000004645 aluminates Chemical class 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000004021 humic acid Substances 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- 208000030208 low-grade fever Diseases 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses an iron base carbonaceous pellet using waste plastics as a carbon source and a preparation method of the iron base carbonaceous pellet, and belongs to the field of metallurgical industry. The carbonaceous pellet is formed by the following components in percentage by weight: 70-85% of ferriferous base material and 15-30% of waste plastics, wherein the waste plastics is composed of acrylonitrile-butadiene-phenethylene, polypropylene, polyvinyl, polystyrene, polyethylene terephthalate, poly (butylene terephthalate), polyamide, PC polycarbonate, and methyl methacrylate; the preparation method comprises the following steps: preparing raw materials, mixing raw materials, weighing each raw materials according to the ratio, fully mixing, preparing the pellet, drying the pellet under hot wind, reducing by calcining the pellet in a reducing furnace under the temperature of 1200-1250 DEG C for 15-30 min. According to the invention, the coal resource is saved, and the resource recycle of waste plastics in metallurgical industry is realized.
Description
Technical field
The present invention relates to a kind of plastic waste is iron-based carbonaceous pelletizing of carbon source and preparation method thereof, belongs to metallurgical industry field.
Background technology
Carbonaceous pelletizing refers in ferrous material with addition of certain proportion carbonaceous material as reductive agent, the pellet of preparing with pelletizing or briquetting technique, as a kind of novel iron-smelting raw material that possesses good autoreduction performance, in order to metallize, production, direct reduction iron making novel process and the iron-contained waste material of raw material and the exploitation of complicated difficult ore dressing New Process for Treatment provide possibility.Production practice of blast furnace shows, when carbonaceous pelletizing add-on is 30%, BF Productivity improves approximately 6～7%, coke ratio significantly reduces more than 25%, fuel ratio (RAR) declines 3～4%, therefore,, from process optimization, energy-saving and cost-reducing angle, the advantage of carbonaceous pelletizing is familiar with more fully.
Produce carbonaceous pelletizing iron-bearing material used and comprise rhombohedral iron ore, magnetite, iron-contained waste material etc., carbonaceous material is taking coke powder, coal dust, charcoal etc. as main.The pelletizing that adopts above-mentioned raw materials to be prepared by disk pellet forming process, after it dries rear early strength and reducing roasting, intensity is lower.The scale production technology that is raw material from domestic and international employing carbonaceous pelletizing, because of carbonaceous pelletizing early strength low, only in rotary hearth furnace (RHF) the direct reduction iron making technique with the thin bed of material operation of 20～25mm, widely apply, and be limited application at the high reactor of the production efficiency such as shaft furnace and blast furnace.In order to realize the roasting of many bed of materials, to enhance productivity, carbonaceous pelletizing intensity becomes key issue.Chinese patent CN200510012722.X discloses a kind of carbon containing cold consolidated iron ball nodulizing with coal self cohesiveness, taking 16～20% cohesiveness bottle coals as reductive agent, taking humic acid or humate as binding agent, the carbon containing cold consolidated iron ball nodulizing processing with pair roller ball press, after 120 DEG C～250 DEG C oven dry, intensity reaches 400～500N/ ball.Chinese patent 200910104365.8 discloses and has adopted method and the application that twice balling-up mode is made metallurgical composite pellet, taking coal dust or coke powder as reductive agent, taking wilkinite, aluminate cement CA-50 as binding agent, prepare the double-deck pelletizing being formed by the pelletizing core at center and the pellet feed that covers outward.Chinese patent CN201010291411.2 discloses a kind of blast furnace high mechanical strength carbonaceous pelletizing and production method thereof, is 1500N/ by adding MgO, producing intensity of roasting, and the carbonaceous pelletizing that degree of metalization is 30%, can be used for blast furnace and produce.Chinese patent 201210426342.0 discloses a kind of blast furnace carbonaceous pelletizing, and taking multiple iron-contained waste material as raw material, taking wilkinite etc. as binding agent, after the carbonaceous pelletizing roasting of preparation, intensity is 1500N/.Though the method that above patent adopts has difference, but all taking coke powder, coal dust etc. as carbon source, be aided with binding agent and prepare carbonaceous pelletizing, there is the problems such as production process complexity, the pelletizing quantity of slag be large, in addition, the carbonaceous pelletizing of preparing with Various Complex iron-contained waste material, can bring the unmanageable potential risk of slag composition to subsequent smelting operation.
Waste plastic is solid waste common in economic production and daily life, its a large amount of C that contain, H element can be used as reductive agent and use, and mould the confocal plastic waste metallurgical raw material utilisation technology that turns to representative at home and abroad promote with Injecting Plastic Scrap into BF and coal.A kind of disclosed method of utilizing waste or used plastics direct-reduction limonite or rhombohedral iron ore to produce iron of Chinese patent 201310578312, has adopted a certain proportion of waste or used plastics as reductive agent, but has still added vast scale hard coal, and is aided with binding agent making pelletizing.There is following defect in above-mentioned patent: 1. the density variation of waste plastic of the same race is not larger, physical structure to pelletizing and reduction process and effect have considerable influence, and the plastic waste that causes lack of standardization of China's waste plastics recovery classification mostly is the complicated mixture in source, therefore this patent can not effectively solve above-mentioned realistic problem.Particularly point out, in the PVC plastics that relate to, contain nearly 50% chlorine in patent, such plastic waste is unprocessed can not be used as reductive agent, and this conclusion is confirmed by foregoing plastic waste metallurgical raw material utilisation technology.2. in the plastics size range providing in patent, pelletizing can not be realized the tightly packed of compound, has weakened the exposure level of plastic waste and ferrous material, and meanwhile, the reducing gas that plastics pyrolytic decomposition produces overflows fast, and the restoring function of plastic waste is lost substantially.
In the face of being becoming tight coking coal resource day, price is soaring present situation constantly, adopts alternative Jiao of waste plastic, coal to produce and have important practical significance and wide application prospect for carbonaceous pelletizing.And waste plastic source is complicated, composition fluctuation is large, therefore, by optimizing plastic waste proportioning, makes it both meet current conditions, meets again carbonaceous pelletizing manufacturing requirements and seems particularly important.
In prior art, use existing relevant report about plastic waste as reductive agent, but its crucial technical barrier existing is: (1) has only adopted a certain proportion of plastic waste as reductive agent, still add vast scale hard coal (as Chinese Patent Application No.: 201310578312); (2) physical difference of different sorts plastic waste is large, adds single plastic waste and cannot ensure the tightly packed of pelletizing material, thereby affect reduction and the strength after being reduced and cooled of carbonaceous pelletizing.The present invention prepares by a certain percentage by multiple plastic waste, has ensured to mix the stable of waste plastic density, and has all adopted the carbon source of plastic waste as carbonaceous pelletizing.Its reductive action mechanism is: under high temperature, plastic waste pyrocondensation generates a large amount of honeycombs pore that declines, and for moisture evaporation and the reduction and gaseous overflow channel that provides in reduction process, has kept stablizing of pelletizing physical structure, is beneficial to fully contacting of reductive agent and ferriferous oxide.Meanwhile, micro-pore has increased gas-solid state reaction interface, is beneficial to the raising of reducing gas rate of diffusion; In addition the H producing in cracking process,
2+ CO mixed gas and high reactivity carbon residue can be strengthened the reduction of carbonaceous pelletizing, cannot serve as thereby broken through independent employing plastic waste the technical bottleneck that reductive agent uses, when having realized independent employing plastic waste as reductive agent, can ensure the metallurgical performance of carbonaceous pelletizing.
In iron containing substrates material in the present embodiment, all iron content is 61.32%, it is 95% that described iron containing substrates material granularity is less than the ratio that 150 object quality account for iron containing substrates material total mass, wherein said iron containing substrates material is by rhombohedral iron ore, magnetite and iron-contained waste material composition, above-mentioned each components in mass portion is composed as follows: 37 parts of rhombohedral iron ore, 48 parts of magnetites, 10 parts of iron-contained waste materials, in described iron containing substrates material, iron-contained waste material comprises iron content copper smelting slag, iron content chromium smelting sludge, iron content nickel metallurgical slag, above-mentioned each components in mass portion is composed as follows: 4 parts of iron content copper smelting slags, 4 parts of iron content chromium smelting sludges, 15 parts of iron content nickel metallurgical slags.
The preparation method of the iron-based carbonaceous pelletizing that a kind of plastic waste of the present embodiment is carbon source, its step is specific as follows:
(1) raw material preparation, is prepared into granularity by iron containing substrates material and is less than 150 object raw materials, and to be wherein less than the ratio that 150 object quality account for iron containing substrates material total mass be 95% to granularity; By standby used plastics become granularity be less than 80 object raw materials, to be wherein less than the ratio that 80 order quality account for plastic waste total mass be 100% to granularity;
(2) raw material mixes, and takes after each material and fully mixes according to proportioning, and wherein the concrete proportioning of iron containing substrates material and plastic waste is described above;
(3) pelletizing preparation, progressively add balling disc to make the pelletizing that diameter is 10-18mm the compound in step (2), in pelletizing process amount of water be controlled at 8-15% all can, in the present embodiment, the mass percent control of amount of water and pelletizing is 11%;
(4) dry, the pelletizing that step (3) is made is placed under hot blast dries, and is specially: 87 DEG C, and 5 minutes time; 120 DEG C, the time is 7 minutes.The multiple plastic waste proposing for the present invention is prepared by a certain percentage, adopt separately plastic waste as reductive agent, must strictly control drying course, in the present invention, drying course is divided into two stages, the bake out temperature of first stage is 80 DEG C～95 DEG C, 5～6 minutes time, ensures ultra-fine plastic waste pyrocondensation in pelletizing, and original position forms micro-pore; The bake out temperature of second stage is 110～130 DEG C, time is 5～9 minutes, free water in pelletizing is discharged through micro-pore evaporation, plastic waste produces visco-plasticity iron-based material is closely connected, thereby guarantee the low temperature intensity of carbonaceous pelletizing, and making pelletizing in high temperature reduction process, keep physical structure stable, this is the outstanding technological innovation of the present invention;
(5) reducing roasting, the pelletizing that step (4) is made is in reducing atmosphere kiln roasting 18min, and reduction zone temperature is controlled at 1210 DEG C.
After tested, the dry rear average 56 times/0.5m of dropping strength of carbonaceous pelletizing prepared by the present embodiment, mean compressive strength reaches 235N/ ball, a mean compressive strength 2150N/ ball after reducing roasting.
Summary of the invention
1, the technical problem that invention will solve
The object of the present invention is to provide a kind of plastic waste is iron-based carbonaceous pelletizing of carbon source and preparation method thereof, can utilize traditional disk pellet forming process production high strength carbonaceous pelletizing, and realize waste plastic recycling.
2, invention technical solution
For achieving the above object, technical scheme provided by the invention is:
The weight percent of the iron-based carbonaceous pelletizing that a kind of plastic waste of the present invention is carbon source is: iron containing substrates material 70～85%, plastic waste 15～30%.In order to ensure carbonaceous pelletizing intensity and metallurgical performance, in described iron containing substrates material, all iron content is preferably 55～68%, and described plastic waste is thermoplastic waste plastic.
Further, described iron containing substrates material is made up of rhombohedral iron ore, magnetite and iron-contained waste material, and above-mentioned each components in mass portion is composed as follows:
35～45 parts of rhombohedral iron ore;
40～55 parts of magnetites;
2～15 parts of iron-contained waste materials,
In this iron containing substrates material, iron-contained waste material comprises iron content copper smelting slag, iron content chromium smelting sludge, iron content nickel metallurgical slag.
Described plastic waste is made up of acrylonitrile-butadiene-styrene (ABS) (ABS), polypropylene (PP), polyethylene (PE), polystyrene (PS), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polymeric amide (PA), polycarbonate (PC) and methyl methacrylate (PMMA), and above-mentioned each components in mass portion is composed as follows:
Further, the invention also discloses a kind of plastic waste is the preparation method of the iron-based carbonaceous pelletizing of carbon source, the steps include:
(1) raw material preparation, is prepared into granularity by iron containing substrates material and is less than 150 object raw materials, and wherein granularity is less than 150 object quality and accounts for ratio >=90% of iron containing substrates material total mass; By standby used plastics become granularity be less than 80 object raw materials, wherein granularity is less than 80 order quality and accounts for ratio >=90% of plastic waste total mass;
(2) raw material mixes, and takes after each material and fully mixes according to proportioning;
(3) pelletizing preparation, progressively adds balling disc to make the pelletizing that diameter is 10-18mm the compound in step (2), and in pelletizing process, amount of water is controlled at 8-15%;
(4) dry, the pelletizing that step (3) is made is placed under hot blast dries, and is specially: 80 DEG C～95 DEG C, and 5～6 minutes time, ultra-fine plastic waste pyrocondensation in pelletizing, original position forms micro-pore; 110～130 DEG C, the time is 5～9 minutes, and in pelletizing, free water is discharged through micro-pore evaporation, and plastic waste produces visco-plasticity iron-based material is closely connected;
(5) reducing roasting, the pelletizing that step (4) is made is in reducing atmosphere kiln roasting 15～30min, and reduction zone temperature is controlled at 1200 DEG C～1250 DEG C.
After tested, after the carbonaceous pelletizing prepared by the inventive method is dry dropping strength exceed 35 times/more than 0.5m, ultimate compression strength reaches 190N/ more than ball, after reducing roasting, ultimate compression strength reaches 1900N/ more than ball.Wherein, in the present invention, intensity test is undertaken by GB/T14201-93 " iron ore pellets compressive strength determination method ", and dropping strength is measured as apart from thickness 10mm steel plate 500mm.
3, the effect of invention
(1) the present invention uses multiple discarded mixed plastic, meets the not perfect social status quo of current China's waste plastics recovery system.Prepare by a certain percentage by multiple plastic waste, ensured to mix the stable of waste plastic density.Carbon source using it as carbonaceous pelletizing, reductive action mechanism is: under high temperature, plastic waste pyrocondensation generates a large amount of honeycombs pore that declines, and is moisture evaporation and the reduction and gaseous overflow channel that provides in reduction process, keep the stable of pelletizing physical structure, be beneficial to fully contacting of reductive agent and ferriferous oxide.Meanwhile, micro-pore has increased gas-solid state reaction interface, is beneficial to the raising of reducing gas rate of diffusion; In addition the H producing in cracking process,
2+ CO mixed gas and high reactivity carbon residue can be strengthened the reduction of carbonaceous pelletizing.
(2) the multiple discarded mixed plastic that the present invention uses has binding agent effect concurrently.Microscopic examination proves, the waste plastic particles of certain fineness has typical bulk fiber structure, and the good electrostatic attraction in addition self having between ultra-fine plastic grain, is beneficial to the balling-up of pelletizing process, without outer adding additives.After low-grade fever, in pelletizing, plastic waste can produce good plasticity, and iron-based material is closely connected, and can obtain excellent cold strength, for next step high temperature reduction provides important guarantee.
(3) the multiple discarded mixed plastic that the present invention uses, C, H element total content reach more than 95%, and ash content, lower than 3%, has reduced slag content ratio in pelletizing.
(4) the present invention utilizes existing disk pellet forming process and equipment can carry out suitability for industrialized production, in saving coal resources, has realized the resource reutilization of waste plastic in metallurgical industry.
Embodiment
In order further to explain content of the present invention, below in conjunction with embodiment, the invention will be further described.50274001) and " Changing Pattern of Reduction of Pellet Containing Coal Char process hot strength with form mechanism " (approval number: 51274003) under financial aid patent applicant is in National Nature fund project " fundamental research of Injecting Plastic Scrap into BF " (approval number:, to the softening pyrolysis characteristics of plastic waste and in carbonaceous pelletizing the behavior in reduction process conduct in-depth research, the application that result of study is this patent provides reliable Data support.
Embodiment 1
The iron-based carbonaceous pelletizing that a kind of plastic waste of the present embodiment is carbon source, is made up of the component of following weight percent: iron containing substrates material 83% and plastic waste 17%.Wherein: it is 100% that plastic waste granularity is less than the ratio that 80 object quality account for plastic waste total mass, plastic waste is by acrylonitrile-butadiene-styrene (ABS) (ABS), polypropylene (PP), polyethylene (PE), polystyrene (PS), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polymeric amide (PA), polycarbonate (PC) and methyl methacrylate (PMMA) composition, above-mentioned each components in mass portion is composed as follows: 11 parts of acrylonitrile-butadiene-styrene (ABS)s (ABS), 15 parts of polypropylene (PP), 18 parts of polyethylene (PE), 6 parts of polystyrene (PS), 13 parts of polyethylene terephthalates (PET), 6 parts of polybutylene terephthalates (PBT), 7 parts of polymeric amide (PA), 11 parts of polycarbonate (PC), 6 parts of methyl methacrylates (PMMA).
Embodiment 2
The iron-based carbonaceous pelletizing that a kind of plastic waste of the present embodiment is carbon source, is made up of the component of following weight percent: iron containing substrates material 70% and plastic waste 30%.Wherein: it is 98% that plastic waste granularity is less than the ratio that 80 object quality account for plastic waste total mass, plastic waste is by acrylonitrile-butadiene-styrene (ABS) (ABS), polypropylene (PP), polyethylene (PE), polystyrene (PS), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polymeric amide (PA), polycarbonate (PC) and methyl methacrylate (PMMA) composition, above-mentioned each components in mass portion is composed as follows: 10 parts of acrylonitrile-butadiene-styrene (ABS)s (ABS), 16 parts of polypropylene (PP), 20 parts of polyethylene (PE), 5 parts of polystyrene (PS), 12 parts of polyethylene terephthalates (PET), 5 parts of polybutylene terephthalates (PBT), 6 parts of polymeric amide (PA), 9 parts of polycarbonate (PC), 8 parts of methyl methacrylates (PMMA).
In iron containing substrates material in the present embodiment, all iron content is 64.56%, it is 98% that described iron containing substrates material granularity is less than the ratio that 150 object quality account for iron containing substrates material total mass, wherein said iron containing substrates material is by rhombohedral iron ore, magnetite and iron-contained waste material composition, above-mentioned each components in mass portion is composed as follows: 40 parts of rhombohedral iron ore, 55 parts of magnetites, 3 parts of iron-contained waste materials, in described iron containing substrates material, iron-contained waste material comprises iron content copper smelting slag, iron content chromium smelting sludge, iron content nickel metallurgical slag, above-mentioned each components in mass portion is composed as follows: 4 parts of iron content copper smelting slags, 4 parts of iron content chromium smelting sludges, 15 parts of iron content nickel metallurgical slags.
The preparation method of the iron-based carbonaceous pelletizing that a kind of plastic waste of the present embodiment is carbon source, its step is specific as follows:
(1) raw material preparation, is prepared into granularity by iron containing substrates material and is less than 150 object raw materials, and to be wherein less than the ratio that 150 object quality account for iron containing substrates material total mass be 98% to granularity; By standby used plastics become granularity be less than 80 object raw materials, to be wherein less than the ratio that 80 order quality account for plastic waste total mass be 98% to granularity;
(2) raw material mixes, and takes after each material and fully mixes according to proportioning, and wherein the concrete proportioning of iron containing substrates material and plastic waste is described above;
(3) pelletizing preparation, progressively adds balling disc to make the pelletizing that diameter is 10-18mm the compound in step (2), and in pelletizing process, the mass percent control of amount of water and pelletizing is 10%;
(4) dry, the pelletizing that step (3) is made is placed under hot blast dries, and is specially: 80 DEG C, and 6 minutes time; 130 DEG C, the time is 5 minutes;
(5) reducing roasting, the pelletizing that step (4) is made is in reducing atmosphere kiln roasting 25min, and reduction zone temperature is controlled at 1250 DEG C.
After tested, the dry rear average dropping strength of carbonaceous pelletizing prepared by the present embodiment is greater than 80 times/0.5m, and mean compressive strength reaches 364N/ ball, a mean compressive strength 2480N/ ball after reducing roasting.
Embodiment 3
The iron-based carbonaceous pelletizing that a kind of plastic waste of the present embodiment is carbon source, is made up of the component of following weight percent: iron containing substrates material 85% and plastic waste 15%.Wherein: it is 96% that plastic waste granularity is less than the ratio that 80 object quality account for plastic waste total mass, plastic waste is by acrylonitrile-butadiene-styrene (ABS) (ABS), polypropylene (PP), polyethylene (PE), polystyrene (PS), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polymeric amide (PA), polycarbonate (PC) and methyl methacrylate (PMMA) composition, above-mentioned each components in mass portion is composed as follows: 12 parts of acrylonitrile-butadiene-styrene (ABS)s (ABS), 15 parts of polypropylene (PP), 20 parts of polyethylene (PE), 8 parts of polystyrene (PS), 12 parts of polyethylene terephthalates (PET), 5 parts of polybutylene terephthalates (PBT), 6 parts of polymeric amide (PA), 8 parts of polycarbonate (PC), 8 parts of methyl methacrylates (PMMA).
In iron containing substrates material in the present embodiment, all iron content is 62.56%, it is 97% that described iron containing substrates material granularity is less than the ratio that 150 object quality account for iron containing substrates material total mass, wherein said iron containing substrates material is by rhombohedral iron ore, magnetite and iron-contained waste material composition, above-mentioned each components in mass portion is composed as follows: 45 parts of rhombohedral iron ore, 42 parts of magnetites, 10 parts of iron-contained waste materials, in described iron containing substrates material, iron-contained waste material comprises iron content copper smelting slag, iron content chromium smelting sludge, iron content nickel metallurgical slag, above-mentioned each components in mass portion is composed as follows: 4 parts of iron content copper smelting slags, 4 parts of iron content chromium smelting sludges, 15 parts of iron content nickel metallurgical slags.
The preparation method of the iron-based carbonaceous pelletizing that a kind of plastic waste of the present embodiment is carbon source, its step is specific as follows:
(1) raw material preparation, is prepared into granularity by iron containing substrates material and is less than 150 object raw materials, and to be wherein less than the ratio that 150 object quality account for iron containing substrates material total mass be 97% to granularity; By standby used plastics become granularity be less than 80 object raw materials, to be wherein less than the ratio that 80 order quality account for plastic waste total mass be 96% to granularity;
(2) raw material mixes, and takes after each material and fully mixes according to proportioning, and wherein the concrete proportioning of iron containing substrates material and plastic waste is described above;
(3) pelletizing preparation, progressively adds balling disc to make the pelletizing that diameter is 10-18mm the compound in step (2), and in pelletizing process, the mass percent control of amount of water and pelletizing is 13%;
(4) dry, the pelletizing that step (3) is made is placed under hot blast dries, and is specially: 95 DEG C, and 5.5 minutes time; 110 DEG C, the time is 9 minutes;
(5) reducing roasting, the pelletizing that step (4) is made is in reducing atmosphere kiln roasting 30min, and reduction zone temperature is controlled at 1200 DEG C.
After tested, the dry rear average 35 times/0.5m of dropping strength of carbonaceous pelletizing prepared by the present embodiment, mean compressive strength reaches 195N/ ball, a mean compressive strength 1910N/ ball after reducing roasting.
Claims (5)
1. the iron-based carbonaceous pelletizing that plastic waste is carbon source, it is characterized in that being formed by the component of following weight percent: iron containing substrates material 70～85% and plastic waste 15～30%, wherein: plastic waste is by acrylonitrile-butadiene-styrene (ABS) (ABS), polypropylene (PP), polyethylene (PE), polystyrene (PS), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polymeric amide (PA), polycarbonate (PC) and methyl methacrylate (PMMA) composition, above-mentioned each components in mass portion is composed as follows:
2. the iron-based carbonaceous pelletizing that a kind of plastic waste according to claim 1 is carbon source, it is characterized in that: in described iron containing substrates material, all iron content is 55～68%, wherein said iron containing substrates material is made up of rhombohedral iron ore, magnetite and iron-contained waste material, and above-mentioned each components in mass portion is composed as follows:
35～45 parts of rhombohedral iron ore;
40～55 parts of magnetites;
2～15 parts of iron-contained waste materials.
3. the iron-based carbonaceous pelletizing that a kind of plastic waste according to claim 2 is carbon source, it is characterized in that: described iron containing substrates material granularity is less than 150 object quality and accounts for ratio >=90% of iron containing substrates material total mass, plastic waste granularity is less than 80 object quality and accounts for ratio >=90% of plastic waste total mass.
4. a preparation method for the iron-based carbonaceous pelletizing that plastic waste is carbon source, is characterized in that, comprises the steps:
(1) raw material preparation, is prepared into granularity by iron containing substrates material and is less than 150 object raw materials, and wherein granularity is less than 150 object quality and accounts for ratio >=90% of iron containing substrates material total mass; By standby used plastics become granularity be less than 80 object raw materials, wherein granularity is less than 80 order quality and accounts for ratio >=90% of plastic waste total mass;
(2) raw material mixes, and takes after each material and fully mixes according to proportioning;
(3) pelletizing preparation, progressively adds balling disc to make the pelletizing that diameter is 10-18mm the compound in step (2), and in pelletizing process, amount of water is controlled at 8-15%;
(4) dry, the pelletizing that step (3) is made is placed under hot blast dries, and is specially: 80 DEG C～95 DEG C, and 5～6 minutes time; 110～130 DEG C, the time is 5～9 minutes;
(5) reducing roasting, the pelletizing that step (4) is made is in reducing atmosphere kiln roasting 15～30min, and reduction zone temperature is controlled at 1200 DEG C～1250 DEG C.
5. the preparation method of the iron-based carbonaceous pelletizing that a kind of plastic waste according to claim 4 is carbon source, it is characterized in that: in step (2), each material is made up of the component of following weight percent: iron containing substrates material 70～85% and plastic waste 15～30%, wherein: plastic waste is by acrylonitrile-butadiene-styrene (ABS) (ABS), polypropylene (PP), polyethylene (PE), polystyrene (PS), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polymeric amide (PA), polycarbonate (PC) and methyl methacrylate (PMMA) composition, above-mentioned each components in mass portion is composed as follows:
In described iron containing substrates material, all iron content is 55～68%, and wherein said iron containing substrates material is made up of rhombohedral iron ore, magnetite and iron-contained waste material, and above-mentioned each components in mass portion is composed as follows:
35～45 parts of rhombohedral iron ore;
40～55 parts of magnetites;
2～15 parts of iron-contained waste materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410348368.7A CN104073630B (en) | 2014-07-21 | 2014-07-21 | A kind of waste plastics is iron-based carbonaceous pelletizing of carbon source and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410348368.7A CN104073630B (en) | 2014-07-21 | 2014-07-21 | A kind of waste plastics is iron-based carbonaceous pelletizing of carbon source and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104073630A true CN104073630A (en) | 2014-10-01 |
| CN104073630B CN104073630B (en) | 2016-05-25 |
Family
ID=51595231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410348368.7A Expired - Fee Related CN104073630B (en) | 2014-07-21 | 2014-07-21 | A kind of waste plastics is iron-based carbonaceous pelletizing of carbon source and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104073630B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106222350A (en) * | 2016-08-19 | 2016-12-14 | 安徽工业大学 | A kind of coating material suppressing iron ore pellets melting and reducing excessively to cohere and preparation method thereof |
| CN108384947A (en) * | 2018-05-28 | 2018-08-10 | 东北大学 | It is a kind of economical to prepare carbonaceous pelletizing method, its carbonaceous pelletizing and its smelting process |
| CN108546794A (en) * | 2018-04-17 | 2018-09-18 | 北京科技大学 | Waste plastics is to promote the method for iron ore reduction in a kind of solid waste of recycling city |
| CN114892000A (en) * | 2022-05-20 | 2022-08-12 | 北京高创智信冶金科技有限公司 | Co-resource utilization method using waste polyvinyl chloride as zinc-lead containing metallurgical dust reduction volatile agent |
| CN117926038A (en) * | 2023-11-29 | 2024-04-26 | 广东粤桥新材料科技有限公司 | Reducing agent for titanium concentrate redox separation and titanium concentrate redox separation process |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0829544A1 (en) * | 1996-09-13 | 1998-03-18 | Nkk Corporation | Method for blowing synthetic resin into furnace and apparatus therefor |
| CN1786202A (en) * | 2005-12-16 | 2006-06-14 | 青岛森田金属有限公司 | Composite carbon containing pellet |
| CN1896286A (en) * | 2006-06-13 | 2007-01-17 | 苏亚杰 | Direct iron-reduction by iron-ore briquet self-production reproduced gas |
| CN101443465A (en) * | 2006-03-13 | 2009-05-27 | 密歇根理工大学 | Production of iron using environmentally-benign renewable or recycled reducing agent |
| CN102149526A (en) * | 2008-09-12 | 2011-08-10 | 杰富意钢铁株式会社 | Method for producing pulverized waste plastic and solid fuel or mineral reduction material |
| CN103602772A (en) * | 2013-11-18 | 2014-02-26 | 内蒙古科技大学 | Method for producing iron by directly reducing brown iron ore or hematite by means of waste plastic |
-
2014
- 2014-07-21 CN CN201410348368.7A patent/CN104073630B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0829544A1 (en) * | 1996-09-13 | 1998-03-18 | Nkk Corporation | Method for blowing synthetic resin into furnace and apparatus therefor |
| CN1786202A (en) * | 2005-12-16 | 2006-06-14 | 青岛森田金属有限公司 | Composite carbon containing pellet |
| CN101443465A (en) * | 2006-03-13 | 2009-05-27 | 密歇根理工大学 | Production of iron using environmentally-benign renewable or recycled reducing agent |
| CN1896286A (en) * | 2006-06-13 | 2007-01-17 | 苏亚杰 | Direct iron-reduction by iron-ore briquet self-production reproduced gas |
| CN102149526A (en) * | 2008-09-12 | 2011-08-10 | 杰富意钢铁株式会社 | Method for producing pulverized waste plastic and solid fuel or mineral reduction material |
| CN103602772A (en) * | 2013-11-18 | 2014-02-26 | 内蒙古科技大学 | Method for producing iron by directly reducing brown iron ore or hematite by means of waste plastic |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106222350A (en) * | 2016-08-19 | 2016-12-14 | 安徽工业大学 | A kind of coating material suppressing iron ore pellets melting and reducing excessively to cohere and preparation method thereof |
| CN106222350B (en) * | 2016-08-19 | 2018-08-21 | 安徽工业大学 | A kind of coating material and preparation method thereof for inhibiting iron ore pellets melting and reducing excessively to cohere |
| CN108546794A (en) * | 2018-04-17 | 2018-09-18 | 北京科技大学 | Waste plastics is to promote the method for iron ore reduction in a kind of solid waste of recycling city |
| CN108384947A (en) * | 2018-05-28 | 2018-08-10 | 东北大学 | It is a kind of economical to prepare carbonaceous pelletizing method, its carbonaceous pelletizing and its smelting process |
| CN114892000A (en) * | 2022-05-20 | 2022-08-12 | 北京高创智信冶金科技有限公司 | Co-resource utilization method using waste polyvinyl chloride as zinc-lead containing metallurgical dust reduction volatile agent |
| CN117926038A (en) * | 2023-11-29 | 2024-04-26 | 广东粤桥新材料科技有限公司 | Reducing agent for titanium concentrate redox separation and titanium concentrate redox separation process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104073630B (en) | 2016-05-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103114201B (en) | Agglomeration method for iron containing dust slime of iron and steel plants | |
| CN101805827B (en) | Sludge oxidized pellet and its preparation method | |
| CN109652643B (en) | High-quality sinter for COREX smelting reduction iron-making process and preparation method thereof | |
| CN101270410A (en) | Cold bonded pellet and method of producing the same | |
| CN102925675B (en) | Method for recovering sludge from smelting ironmaking | |
| CN101879599B (en) | Method for preparing reductive iron powder and high-purity refined iron powder by using iron ores | |
| CN104073630A (en) | Iron base carbonaceous pellet using waste plastics as carbon source and preparation method of iron base carbonaceous pellet | |
| CN104046773A (en) | Technique for producing cold-bonded pellets from steel converter dust removal ash | |
| CN111621611B (en) | Two-step method for efficiently separating iron and phosphorus from high-phosphorus iron-containing resource based on gas-based energy | |
| CN111647753B (en) | Method for recovering zinc by direct reduction of melting gasification furnace | |
| CN102296177A (en) | Method for reinforcing sintering of iron ores difficult to pelletize by biomass fuel | |
| CN1861265B (en) | Ore-dressing process by using carbon-contg. block to reduce lean iron ore for prodn. of magnetite | |
| CN103451346A (en) | Copper smelting slag reduction method | |
| CN103710536A (en) | Preparation method of pellet binder with high performance | |
| CN103993166A (en) | Method for improving grade of low-grade iron ore | |
| CN103451421B (en) | Preparation method of blast furnace gas mud pre-reduced pellets | |
| CN100529121C (en) | Method for preparing hot pressed balls of iron ore concentrate and powdered coal | |
| CN102344981A (en) | Separation and direct reduction process of iron and boron in boron-containing iron ore concentrate | |
| CN103882224A (en) | Coupling type sintering method of low-grade laterite-nickel ores | |
| CN102268502B (en) | Spongy iron preparation method by smelting refractory iron ore (slag) with reduction rotary kiln | |
| CN1074714A (en) | Cold concretion high carbon content iron mineral ball group for iron-smelting | |
| CN105219954A (en) | A kind of recoverying and utilizing method of dedusting ash of stainless steel | |
| CN103937971A (en) | Preparation method of iron-ore hot-pressed carbon-containing pellet and iron-making raw material | |
| CN103789477A (en) | Method for producing direct reduced iron by high phosphorus oolitic hematite and blast furnace ash | |
| CN103602773B (en) | Method for comprehensive utilization of paigeite through direct reduction-electric furnace melting separation of rotary hearth furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160525 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |