CN1187156A - Process for recovering iron from iron-rich material - Google Patents
Process for recovering iron from iron-rich material Download PDFInfo
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- CN1187156A CN1187156A CN96194524A CN96194524A CN1187156A CN 1187156 A CN1187156 A CN 1187156A CN 96194524 A CN96194524 A CN 96194524A CN 96194524 A CN96194524 A CN 96194524A CN 1187156 A CN1187156 A CN 1187156A
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 192
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 94
- 238000000034 method Methods 0.000 title claims description 58
- 239000000463 material Substances 0.000 title abstract description 28
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 14
- 229910052799 carbon Inorganic materials 0.000 claims description 45
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 44
- 239000000203 mixture Substances 0.000 claims description 44
- 239000000126 substance Substances 0.000 claims description 40
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 22
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 20
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 18
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 claims description 13
- 229920000642 polymer Polymers 0.000 claims description 13
- 239000000853 adhesive Substances 0.000 claims description 12
- 230000001070 adhesive effect Effects 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 10
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 9
- 239000002904 solvent Substances 0.000 claims description 9
- 229910000323 aluminium silicate Inorganic materials 0.000 claims description 8
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 8
- -1 polyethylene Polymers 0.000 claims description 8
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 7
- 235000013312 flour Nutrition 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 7
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims description 6
- 239000004698 Polyethylene Substances 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 229920000573 polyethylene Polymers 0.000 claims description 6
- 229920002689 polyvinyl acetate Polymers 0.000 claims description 6
- 239000011118 polyvinyl acetate Substances 0.000 claims description 6
- 230000008016 vaporization Effects 0.000 claims description 6
- 239000004902 Softening Agent Substances 0.000 claims description 5
- 239000000404 calcium aluminium silicate Substances 0.000 claims description 5
- 235000012215 calcium aluminium silicate Nutrition 0.000 claims description 5
- 229940078583 calcium aluminosilicate Drugs 0.000 claims description 5
- 239000000839 emulsion Substances 0.000 claims description 5
- 229920001519 homopolymer Polymers 0.000 claims description 5
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 5
- 239000011707 mineral Substances 0.000 claims description 5
- 229920005989 resin Polymers 0.000 claims description 5
- 239000011347 resin Substances 0.000 claims description 5
- 238000009834 vaporization Methods 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 239000004094 surface-active agent Substances 0.000 claims description 4
- 238000004090 dissolution Methods 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims description 2
- 230000003750 conditioning effect Effects 0.000 claims description 2
- 238000004945 emulsification Methods 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims 2
- 238000010438 heat treatment Methods 0.000 claims 1
- 230000000379 polymerizing effect Effects 0.000 claims 1
- 239000011369 resultant mixture Substances 0.000 claims 1
- 239000000428 dust Substances 0.000 abstract description 39
- 239000007787 solid Substances 0.000 abstract description 11
- 239000002699 waste material Substances 0.000 abstract description 8
- 238000010891 electric arc Methods 0.000 abstract description 7
- 239000011230 binding agent Substances 0.000 abstract 1
- 238000009628 steelmaking Methods 0.000 abstract 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 19
- 229910052751 metal Inorganic materials 0.000 description 16
- 239000002184 metal Substances 0.000 description 16
- 239000000047 product Substances 0.000 description 14
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 13
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 12
- 229910052725 zinc Inorganic materials 0.000 description 12
- 239000011701 zinc Substances 0.000 description 12
- 229910000831 Steel Inorganic materials 0.000 description 11
- 239000010959 steel Substances 0.000 description 11
- 238000006722 reduction reaction Methods 0.000 description 9
- 238000004458 analytical method Methods 0.000 description 8
- 229910052793 cadmium Inorganic materials 0.000 description 7
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 7
- 229910052710 silicon Inorganic materials 0.000 description 7
- 239000010703 silicon Substances 0.000 description 7
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 6
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 6
- 239000005864 Sulphur Substances 0.000 description 6
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 6
- 229910052804 chromium Inorganic materials 0.000 description 6
- 239000011651 chromium Substances 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 229910052748 manganese Inorganic materials 0.000 description 6
- 239000011572 manganese Substances 0.000 description 6
- 229910052750 molybdenum Inorganic materials 0.000 description 6
- 239000011733 molybdenum Substances 0.000 description 6
- 229910052759 nickel Inorganic materials 0.000 description 6
- 229910052698 phosphorus Inorganic materials 0.000 description 6
- 239000011574 phosphorus Substances 0.000 description 6
- 239000002893 slag Substances 0.000 description 6
- 239000010936 titanium Substances 0.000 description 6
- 229910052719 titanium Inorganic materials 0.000 description 6
- 239000000571 coke Substances 0.000 description 5
- 239000012535 impurity Substances 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 238000011946 reduction process Methods 0.000 description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 4
- 229910052785 arsenic Inorganic materials 0.000 description 4
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 4
- 229910052796 boron Inorganic materials 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 239000002912 waste gas Substances 0.000 description 4
- 241000196324 Embryophyta Species 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 238000009835 boiling Methods 0.000 description 3
- 239000004927 clay Substances 0.000 description 3
- 239000003245 coal Substances 0.000 description 3
- 239000002817 coal dust Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 239000010419 fine particle Substances 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 239000000376 reactant Substances 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 241000218645 Cedrus Species 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000010306 acid treatment Methods 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000012265 solid product Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- WURBVZBTWMNKQT-UHFFFAOYSA-N 1-(4-chlorophenoxy)-3,3-dimethyl-1-(1,2,4-triazol-1-yl)butan-2-one Chemical compound C1=NC=NN1C(C(=O)C(C)(C)C)OC1=CC=C(Cl)C=C1 WURBVZBTWMNKQT-UHFFFAOYSA-N 0.000 description 1
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 229910001308 Zinc ferrite Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 125000003158 alcohol group Chemical group 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 230000002968 anti-fracture Effects 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 239000006063 cullet Substances 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000010795 gaseous waste Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 150000002506 iron compounds Chemical class 0.000 description 1
- YOBAEOGBNPPUQV-UHFFFAOYSA-N iron;trihydrate Chemical compound O.O.O.[Fe].[Fe] YOBAEOGBNPPUQV-UHFFFAOYSA-N 0.000 description 1
- 229910052622 kaolinite Inorganic materials 0.000 description 1
- JQJCSZOEVBFDKO-UHFFFAOYSA-N lead zinc Chemical compound [Zn].[Pb] JQJCSZOEVBFDKO-UHFFFAOYSA-N 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000011236 particulate material Substances 0.000 description 1
- 239000002952 polymeric resin Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- WGEATSXPYVGFCC-UHFFFAOYSA-N zinc ferrite Chemical compound O=[Zn].O=[Fe]O[Fe]=O WGEATSXPYVGFCC-UHFFFAOYSA-N 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
- Manufacture And Refinement Of Metals (AREA)
Abstract
Iron-rich material waste products, such as electric arc furnace dust, are formed with an organic binder into discrete shapes, such as briquettes and/or other solid shapes. The shapes can then be used in iron and steel making processes and the iron and heavy metal values in the waste product recovered.
Description
Technical background
The present invention relates to particularly from those discarded objects that iron and steel production process, form, reclaim metallics from smelting waste material.
Background technology
In the production process of iron and steel, formed the waste material that contains iron oxide and contain other oxidized metal usually.These discarded objects are present in the gaseous waste stream with the dust attitude usually.Because these dust have tiny particle size, these discarded object intractable reclaim iron if only it is introduced again in the reduction furnace, then cause these discarded objects to become the part of exhaust gas stream again usually.Therefore, the material of these fine particle size though they have higher tenor, is nugatory substantially.
There is certain methods near the steel manufacturing apparatus, to store and stable dust makes it in heaps.Cause utilizing the space day by day under the condition of limited but sharply appreciate at the environment regulations increasingly stringent with owing to the soil, these methods difficulty that becomes has more and more been accepted.Dust also can be recovered the line stabilization of going forward side by side it is added in pottery and the construction material, but not necessarily economical on cost.But these methods are not utilized the value of remainder fe and other metal in the refuse.
A kind of people see that time waste material of care is the dust from arc furnace, is commonly called the EAF dust.Electric arc furnaces is usually by using high voltage and current to melt old metal.Old metal can have many sources, comprises, discarded rail, and the section steel, discarded structural steel, and abandoned car do not separating nonferrous metal, and for example plumbous, under the situation of zinc and cadmium, discarded metal is added in the electric arc furnaces.In the operation of electric arc furnaces, described nonferrous metal is vaporized from waste material, and aggegation becomes dust from waste gas stream, then is deposited in the filter bag chamber.Except these metals, waste gas stream in the filter bag chamber sedimentation a large amount of callable iron.Like this, the iron and the heavy metal that are the state of oxidation usually are gathered into unbodied EAF dust, and its particle size is usually less than 20 microns.Owing to wherein contain lead and cadmium, this EAF dust is divided into harmful waste by EPA now.Like this, thereby satisfy the EPA regulation, just must keep treatment step completely in order to protect environment to avoid heavy metal pollution.If can find a kind of effective method to separate and reduction dust composition, all metals that are present in the EAF dust all are valuable and all are callable.In addition, if heavy metal can be removed from dust, the EPA dust can be counted as nontoxic.
Problem hereto, people have taked many methods, but it is different to produce effects.Although these methods can successfully be removed heavy metal, they are not enough to remove de-iron, and have stayed the valueless dust that contains trickle iron oxide usually.
Modal method is called is fuming.Thereby this method utilizes the different boiling of heavy metal to reach the purpose of separation.Dust is heated to temperature more than the metal boiling point to be separated, makes this metal vaporization.With the vaporization metal remove from gas as dust, and aggegation in collecting device so that be further processed.The boiling point of these trace meters is significantly less than iron, and the single component of iron in dust is maximum.With lead, zinc with after cadmium separates, remaining dust mainly contains the iron that exists with form of iron oxide.Owing to be in the dust state, this material can not successfully be processed into iron, but gives over to refuse.Another problem of being fuming is a large amount of energy consumption, and it also produces the discarded dust of himself in a large number.
Another method of handling the EAP dust is the electrometallurgy metallurgy method.The method combines leaching and sedimentation operation with electrolytic deposition.At first the EAP dust is dissolved in the electrolyte with soluble lead zinc and cadmium.Solution is filtered.Carry out sedimentation to capture lead and cadmium with zinc powder then.Then resulting zinc solution is passed through the electrochemistry recovery pond to reclaim zinc.This method can reclaim zinc well, but the leaching process can not dissolved oxygen iron and zinc ferrite, and they remain must dry obsolete material.Dry material exists with trickle dust state again, is worth very little or valueless at all.
People are also with EAF dust and silicate material, silica sand for example, and clay, or cullet mix, and in stove, be heated and form glassy ceramic product.This ceramic product can be used as grinding agent, and the EAP dust also is considered to harmless, but the metal values that is contained in the dust does not obtain reclaiming.These metals are handled by the refining techniques of costliness, only convert it into the material of relative low price so that they are harmless.
The present invention is open
Therefore, thus the processing that the purpose of this invention is to provide a kind of method reads that the dust of iron and heavy metal reclaims iron and heavy metal makes it become useful product.
Other purpose of the present invention will be seen that by following description.
In brief, the present invention's the problems of the prior art of having overcome or having avoided substantially narrating above.The method that forms solid product is provided, and this solid product is with bulk, the ball shape, and/or other solid-state formation exists.Resulting product also comprises rich iron substance, i.e. EAF dust, and carbon source, i.e. and breeze, coal dust, and/or reconstituted substance, these materials lump together the formation solid profiles, and are for example block, thereby can prevent basically that it is degraded into dust and becomes less piece.These blocks provide the iron in steel and the iron process and the carbon of reduced iron.And the heavy metal in the rich iron substance also is added in the block, by vaporizing or being fuming they is separated in the iron reduction process, thereby makes them to be recovered.The uniqueness of this method of being fuming is to utilize the product of granulated carbon and organic bond by using into the piece technology or squeezing out a certain conventional shape or other similar techniques, makes the adding material at first form stable solid.The dust material that the conglutination reaction product is keeping being shaped is until zinc, and plumbous and cadmium is vaporized, and iron oxide has been reduced to elemental iron.This method makes and is recovered in the same process of all substances that is comprised in the EAF dust.According to the economy of its cost, the fuel of this process can be useless breeze, waste coal powder, electricity orphan, perhaps natural gas.
Therefore, the inventive method is to be used for from rich iron substance Hui Tie of opaque and heavy metal.Can not reclaim iron from these powders in the past, nowadays these powders can be processed into section bar and be used for iron and the manufacturing of steel.Not only reclaimed iron, and those heavy metals have also obtained recovery.In the past those are disposed carbonaceous material, for example solid-state, breeze, coal dust as bulk, and/or the effort of reconstituted substance is unsuccessful basically, this be because product can not be fully in conjunction with and unstable, easily decompose in storage before use or the course of conveying or return back to tiny graininess originally.But, the invention enables the material of carbon containing and iron to form solid profiles, this solid profiles is enough firm and durable in transportation and storage process, and also is enough to keep its shape in the iron reduction process, thereby has avoided the early stage decomposition of shape and be brought in the waste gas with dust-like.
Embodiment of the present invention are to be made the method for section bar by trickle rich iron substance, and this method comprises:
(a) mix rich iron substance and carbon source, form rich iron/carbon mix, this flour is substantially free of oil and moisture content;
(b) with styrene or acrylonitrile polymerization resin dissolves in the hygroscopicity solvent to form the resin or the conditioning agent of dissolving.
(c) resin of mixed dissolution, Fu Tie/carbon mix, calcium carbonate, and aluminosilicate adhesive;
(d) to Natene emulsification in water, and emulsion is added in the mixture of step (c), and resulting material is stirred evenly; And
(e) (d) obtained mixture compression moulding.
" trickle rich iron substance " refers to and contains iron, the powdery of iron oxide and/or other iron compound or fine particle or particulate material.Flour also can contain other metal that exists with the metal oxide state, comprises heavy metal, and other mineral matter, and particularly those are found in ore, the discarded object during mineral extract, or the like.
Suitable rich iron substance is the EAF dust (EAF dust) that always settles down from the waste gas stream that is used for the electric arc furnaces that iron and steel make.Other suitable rich iron substance comprises that also steel makes other byproduct in the process, for example mill tap, and the iron oxide of deposition, and dust (being called slag) generally are collected in the filter bag chamber of oxidation furnace.
Rich iron substance is substantially free of moisture content usually, and the humidity level who promptly has is equal to or less than weight ratio 2%, and is substantially free of non-mineral matter, for example oil.This can be finished by suitable cleaning and drying means, preferably, uses the method for describing in detail among the embodiment.
At first flour is mixed with carbon source.In this, rich iron substance and carbon source material can be randomly and mineral acid, and for example hydrochloric acid reacts.Carbon source can be any suitable source, for example metallurgical grade coke.Carbon source must be enough carefully and the formation of the visible solid-state section bar of its shape, will can be further discussed this below.In addition, it should not contain the formation of influential section bar or the impurity of process of influence use section bar reduced iron subsequently.Carbon source generally is tiny flour.
In a typical case of the present invention used, flour and carbon source were mixed the mixture that forms, and carbon source content is weight ratio 15 to 35%, is preferably weight ratio 25%.Then reactant and hydrochloric acid are reacted.Mixture preferably reacts with hydrochloric acid, and the amount of hydrogen hydracid is preferably the acid of weight ratio 2% between 1% and 4%.
With hydrochloric acid reaction after, rich iron/carbon mix and adhesive are carried out compoundly becoming a kind of mixture to form one or more section bars, with reactant mixture and calcium carbonate, aluminosilicate adhesive, organic bond, and polyvinyl alcohol mixes.This can finish by reactant mixture is mixed with calcium carbonate and aluminosilicate material.Calcium carbonate is as curing agent and also mobilely remove impurity to remove to be reduced in the iron phase process as a kind of.Aluminosilicate also is used as the curing agent of section bar, and also as the phase that flows.The alumino-silicate that is used to form section bar can be following these materials, kaolin clay material for example, and kaolinite, the mixture of aluminium oxide and silicon, dolomite lime type clay, or the like.
The organic bond adding is contained in the mixture of calcium carbonate and aluminosilicate.Adhesive is described in Application No. 08/184,099, and the applying date is on January 21st, 1994, and disclosing of this patent application is hereby incorporated by reference.By with styrene or acrylonitrile polymerization resin dissolves in the solvent of hygroscopic, methyl ethyl ketone for example is to prepare this adhesive.
To add by the emulsion of emulsifiable polyethylene polymer in water and contain in the mixture of styrene polymer adhesive.Then with resulting material homogenizing basically.Polyethylene polymer can be polyvinyl alcohol or polyvinyl acetate.
By suitable method, for example push then, molding, and/or compacting, the homogenizing mixture that will contain polyvinyl acetate or polyvinyl alcohol forms solid profiles.In general, the pressure of extruding or molding is very high, between 15,000 and 45,000 pounds/square inch, is preferably 30,000 pounds/square inch, so just can produce closely, the product of anti-fracture and friction.
The accompanying drawing summary
Fig. 1 is a flow chart of describing embodiment of the present invention.
Finish best mode embodiment 1 of the present invention
Present embodiment has been described the rich iron substance of processing powdery (IRM) and has been fed to final production and goes out high-grade metallic iron.With reference to seeing Fig. 1, at first generate a kind of softening agent that contains the impurity of finding among oil and other IRM with a kind of surfactant washing IRM.IRM is carried out drying be lower than 2% of weight to evaporate softening agent and to reduce total water content, to be preferably in revolving burner, though weight ratio 6% also can be used at the most, this will depend on processed composition.
Weigh the then IRM that cleaned and it is smelted a level coke with weight ratio about 25% add in the blender, and react with the hydrochloric acid of weight ratio about 2%.With IRM, coke and hydrochloric acid are mixed together about 5 minutes then.
After the mixing, with the calcium carbonate of weight ratio about 5% and the Kayolite (Al of weight ratio 2.5%
2O
3+ SiO
2) join in the IRM of acid treatment and the coke and mixed about 5 minutes.Calcium carbonate and Kayolite in the IRM mixture as curing agent and when this material is reduced to metal, also serve as mutually mobile.
After the mixing, join the organic bond material of weight ratio about 3% in the batch mixer and made it to mix about 5 minutes.Adhesive is to be dissolved in the hygroscopicity solvent, methyl ethyl ketone for example, styrenic polymer resins (weight ratio 10%).Because this adhesive contains the hygroscopicity solvent, the moisture content that is produced in any reaction in front all can be taken out of by solvent.
After the mixing, add the polyvinyl alcohol homopolymers of weight ratio about 4% in the mixture and made it to mix about 10 minutes.Under high injection pressure, will form easy-to-handle, hard section bar in this material adding cuber or common its similar machine then.
Then the block that is shaped as or other section bar being heated to 250 °F to 400 °F is cured.Solidification process drops to the water content in the block and is lower than weight ratio 2%.In case after solidifying, the block adding is carried out in the electric arc furnaces of oxide reduction.Because block has been kept attitude to be positioned at below the slag blanket by adhesive, until coke and iron oxide generation reduction, iron oxide has minimum energy loss when carrying out reduction.Other material that adds block or other solid profiles then serves as to flow impurity is taken in the slag blanket above the liquid metals district.
Except styrene polymer, also can use acrylonitrile polymer.Suitable homopolymers material is a 32-024 homopolymers PVA emulsion, can buy from National Starch andAdhesive company.Acrylonitrile polymer preferably remains on liquid state for a long time by first and second acetone.Acrylonitrile polymer can be buied from Polymerland company.The MEK of the technical grade of buying from Dice ChemcalCo.and Thatcher Chemical Co. company is gratifying.The acrylonitrile polymer of weight ratio 90% and weight ratio 10% suits, though these content can change.Example II is to V
These embodiment have described the reinforced also final production of the rich iron substance of processing powdery (IRM) and have gone out high-grade metallic iron.For its general step of each embodiment is the lubricant that at first contains other impurity of finding among oil and the IRM with the generation of surfactant washing IRM.IRM is carried out drying in revolving burner make the softening agent vaporization and reduce total water content.
The IRM that will clean weighs and adds in the blender with the graininess carbon source then, and reacts with about 2% hydrochloric acid of weight ratio.Then IRM graininess carbon source and hydrochloric acid are mixed together about 5 minutes.
After the mixing, with the calcium carbonate and the alumina silicate of weight ratio 5%, the Kayolite (Al of weight ratio 2.5%
2O
3+ SiO
2) add among the IRM and granulated carbon of acid treatment, and mixed about 5 minutes.
After the mixing, add the organic bond material of weight ratio about 3% in the batch mixer and made it to mix about 5 minutes.Described adhesive is acrylonitrile polymer and remains on liquid state for a long time by above-described MEK.
After the mixing, will join in the mixture as the polyvinyl alcohol homopolymers of the used weight ratio 4% of embodiment 1 and made it to mix 10 minutes.Under high injection pressure, this material is added in cuber or other machine to form easy-to-handle hard solid profiles then.
Then formed block or other solid profiles are heated to 250 °F to being cured.Solidification process is brought down below weight ratio 2% with the water content of block.In case be cured, the sample of block or other solid profiles is added in the electric arc furnaces that the oxide reduction reaction carries out.To initial substance, and iron and residue product that reduction obtains are analyzed.The result of this this test sums up below.Example II
For present embodiment, graininess carbon is breeze (10400BTU), and IRM is from steel plant (Nucor, Plymoth, mill tap Utah) and from oxidation furnace (Gulf States, Gadston, Alabama) mixture of iron oxide precipitum.For initial substance, the block of producing, and the analysis of reduzate (with percentage by weight) is shown in the following Table A.Join in the block material of reduction process, about 88% has become product iron, and 21% become residue (because the inaccurate and rounding error that calculates, these count sum is not 100% just.
The basic iron tests of Table A
EXAMPLE III
| The project description | Form the initial substance of block | Block | Original product also | |||
| Breeze | Mill tap | Precipitum | Iron | Residue | ||
| Test piece number (Test pc No.) | ???1/8-15-1 | ???2/8-15-1 | ??????3/8-15-1 | ????????4/8-15-1 | ??????5/8-15-1 | ??????6/8-15-1 |
| Carbon | ???????63.3 | ???????0.41 | ??????????6.59 | ????????????18.2 | ??????????3.27 | ??????????0.82 |
| Sulphur | ???????0.54 | ???????0.03 | ??????????0.12 | ????????????0.22 | ??????????0.12 | ??????????0.46 |
| Iron | ???????73.4 | ??????????51.1 | ????????????45.5 | ??????????83.6 | ??????????6.88 | |
| Manganese | ???????0.54 | ??????????0.26 | ???????????0.316 | ?????????0.131 | ?????????0.843 | |
| Phosphorus | ???????0.01 | ??????????0.01 | ????????????0.01 | ????????0.005 | ?????????0.018 | |
| Silicon | ???????0.32 | ??????????0.84 | ????????????1.15 | ?????????0.35 | ????????????12 | |
| Copper | ??????0.206 | ?????????0.061 | ???????????0.088 | ?????????0.194 | ?????????0.028 | |
| Nickel | ??????0.063 | ?????????0.029 | ???????????0.032 | ?????????0.101 | ??????????0.01 | |
| Chromium | ??????0.063 | ??????????0.03 | ???????????0.046 | ?????????0.094 | ?????????0.039 | |
| Molybdenum | ??????0.005 | ?????????0.015 | ???????????0.005 | ?????????0.004 | ?????????0.003 | |
| Tin | ??????0.026 | ??????????0.07 | ???????????0.017 | ??????????0.03 | ?????????0.001 | |
| Zinc | ??????0.008 | ????????0.?426 | ???????????0.143 | ?????????0.008 | ?????????0.001 | |
| Boron | ???????0.01 | ??????????0.01 | ????????????0.01 | ??????????0.03 | ??????????0.01 | |
| Titanium | ??????0.002 | ?????????0.022 | ???????????0.025 | ?????????0.002 | ?????????0.167 | |
| Arsenic | ??????0.001 | ?????????0.001 | ???????????0.001 | ?????????0.001 | ?????????0.001 | |
For present embodiment, graininess carbon is breeze (10400BTU), and IRM is from the rolling squama of steel plant with from the mixture of the sludge (both is at the Geneva of Utah) of basic oxidation furnace (Q-BOP).To initial substance, the analysis of prepared block, and to the analysis of the reduzate of 5 reduction tests of block (weight %), all show and show among following the table B-1 and B-2.For test 1 to 3 consequently for the residue of all three result of the tests.Adding reduction process causes the percentage composition of each material in the block that the residue of iron product generates to be shown among the table C.(because the inaccurate and rounding error that calculates these count sum just in time be not 100%).
Table B-1
Basic iron tests
| The project description | Form the initial substance of block | Block | Reduzate | ||||
| Mill tap | Slag | Test 1 iron | Test 2 iron | Test 3 iron | Test 1-3 residue | ||
| Sample/test # | ???11/8-16-2 | ???12/8-16-2 | ????13/8-16- ????2 | ????14/8-16- ????2 | ????15/8-16- ????3 | ????16/8-17- ????4 | ???17/8-17-4 |
| Carbon | ????????2.28 | ????????19.4 | ????????7.35 | ????????1.85 | ????????2.21 | ????????1.61 | ????????0.15 |
| Sulphur | ????????0.07 | ????????0.28 | ????????0.09 | ????????0.08 | ????????0.06 | ????????0.07 | ????????0.28 |
| Iron | ????????69.3 | ????????41.5 | ????????57.5 | ????????93.2 | ??????????96 | ??????????97 | ????????1.22 |
| Manganese | ???????0.596 | ???????0.083 | ???????0.475 | ?????????0.3 | ???????0.024 | ???????0.081 | ????????0.94 |
| Phosphorus | ????????0.01 | ???????0.084 | ???????0.007 | ???????0.007 | ???????0.008 | ???????0.005 | ???????0.011 |
| Silicon | ????????0.01 | ???????0.014 | ???????????8 | ????????0.06 | ????????0.01 | ????????0.21 | ????????0.01 |
| Copper | ???????0.087 | ????????0.01 | ???????0.007 | ???????0.063 | ???????0.009 | ???????0.031 | ???????0.003 |
| Nickel | ???????0.032 | ???????0.001 | ???????0.008 | ???????0.069 | ???????0.011 | ???????0.022 | ???????0.003 |
| Chromium | ???????0.042 | ????????0.01 | ????????0.01 | ????????0.89 | ???????0.021 | ??????0.0119 | ???????0.002 |
| Molybdenum | ???????0.003 | ????????0.01 | ????????0.01 | ???????0.014 | ???????0.012 | ???????0.157 | ????????0.01 |
| Tin | ???????0.003 | ???????0.034 | ???????0.007 | ???????0.004 | ???????0.001 | ???????0.001 | ????????0.29 |
| Zinc | ???????0.015 | ????????0.35 | ???????0.036 | ???????0.013 | ???????0.005 | ???????0.007 | ???????0.005 |
| Boron | ????????0.01 | ????????0.25 | ????????0.26 | ????????0.01 | ????????0.01 | ????????0.01 | ????????1.45 |
| Titanium | ???????0.003 | ???????0.034 | ???????0.007 | ???????0.004 | ???????0.001 | ???????0.001 | ????????0.29 |
| Arsenic | ???????0.003 | ???????0.003 | ???????0.003 | ????????0.03 | ???????0.003 | ???????0.003 | ???????0.003 |
| Aluminium | ????????18.4 | ||||||
| Magnesium | ????????6.64 | ||||||
| Plumbous | ????????3.77 | ||||||
| Cadmium | ????????0.01 | ||||||
The basic iron tests of table B-2
| The project description | Form the initial substance of block | Block | Reduzate | ||||
| Mill tap | Slag | Test 4 iron | Test 4 residues | Test 5 iron | Test 5 residues | ||
| Sample/test # | ???11/8-16-2 | ???12/8-16-2 | ???13/8-16-2 | ???18/8-17-5 | ???19/8-17-5 | ?????20/8-21-6 | ???21/8-21-6 |
| Carbon | ????????2.28 | ????????19.4 | ????????7.35 | ????????2.34 | ????????0.16 | ??????????2.39 | ????????0.26 |
| Sulphur | ????????0.07 | ????????0.28 | ????????0.09 | ????????0.06 | ????????0.37 | ??????????0.07 | ????????0.33 |
| Iron | ????????69.3 | ????????41.5 | ????????57.5 | ????????86.1 | ?????????1.5 | ??????????89.6 | ????????0.75 |
| Manganese | ???????0.596 | ???????0.083 | ???????0.475 | ???????0.446 | ?????????1.2 | ?????????0.175 | ???????0.678 |
| Phosphorus | ????????0.01 | ???????0.084 | ???????0.007 | ????????0.09 | ???????0.017 | ??????????0.01 | ???????0.003 |
| Silicon | ????????0.01 | ???????0.014 | ???????????8 | ????????0.05 | ????????0.01 | ?????????0.193 | ????????23.5 |
| Copper | ???????0.087 | ????????0.01 | ???????0.007 | ????????0.04 | ???????0.002 | ?????????0.036 | ???????0.014 |
| Nickel | ???????0.032 | ???????0.001 | ???????0.008 | ???????0.043 | ???????0.003 | ?????????0.027 | ???????0.001 |
| Chromium | ???????0.042 | ????????0.01 | ????????0.01 | ???????0.064 | ????????0.01 | ?????????0.029 | ???????0.001 |
| Molybdenum | ???????0.003 | ????????0.01 | ????????0.01 | ???????0.003 | ???????0.003 | ??????????0.01 | ????????0.01 |
| Tin | ???????0.003 | ???????0.034 | ???????0.007 | ???????0.058 | ???????0.251 | ??????????0.03 | ????????0.01 |
| Zinc | ???????0.015 | ????????0.35 | ???????0.036 | ???????0.014 | ???????0.002 | ?????????0.006 | ???????0.005 |
| Boron | ????????0.01 | ????????0.25 | ????????0.26 | ????????0.01 | ????????1.56 | ??????????0.01 | ????????1.53 |
| Titanium | ???????0.003 | ???????0.034 | ???????0.007 | ???????0.058 | ???????0.251 | ?????????0.046 | ???????0.357 |
| Arsenic | ???????0.003 | ???????0.003 | ???????0.003 | ???????0.003 | ???????0.003 | ?????????0.005 | ??????0.0058 |
Table C
Reduzate
EXAMPLE IV
| Reduction test | Iron | Residue |
| ??????1 | ???96.594 | ?????????4.667 |
| ??????2 | ???98.385 | |
| ??????3 | ??99.2199 | |
| ??????4 | ???89.379 | ?????????5.342 |
| ??????5 | ???92.637 | ???????27.4548 |
For present embodiment, graininess carbon is breeze (10400BTU), and IRM is near the iron ore in the Geneva ore deposit the Utah State Cedar city with from the mixture of the filter residue of basic oxidation furnace (Q-BOP) (Utah, Geneva, Geneva steel plant).To initial substance, the analysis of the block that makes (weight %), and to five tests of block and the analysis of reduzate, all be shown among the following table D.Add the material in the block of reduction process for test 1, wherein about 88.9% has become iron product and 22.1 has become residue thing (because the inaccurate and rounding error that calculates these count sum be not 100% just).Test 2 does not obtain these data.
The basic iron tests of table D
EXAMPLE V
| The project description | Form the initial substance of block | Block | Reduzate | ||||
| RED SEA slag | The CEDAR ore | Test 1 iron | Test 1 residue | Test 2 iron | Test 2 residues | ||
| Sample # | ???24/8-21-8 | ?????25/8-21-8 | ???26/8-21-8 | ???22/8-21-7 | ???23/8-21-7 | ???27/8-21-8 | ???28/8-21-8 |
| Carbon | ????????0.82 | ??????????0.24 | ????????21.6 | ????????2.29 | ????????0.86 | ????????2.69 | ????????10.7 |
| Sulphur | ?????????0.1 | ??????????0.06 | ????????0.19 | ????????0.05 | ????????0.47 | ????????0.01 | ?????????1.5 |
| Iron | ????????46.1 | ??????????46.4 | ????????33.9 | ??????????86 | ????????2.25 | ????????40.5 | ????????2.93 |
| Manganese | ???????0.319 | ?????????0.058 | ???????0.113 | ?????????0.2 | ???????0.897 | ???????0.084 | ???????0.013 |
| Phosphorus | ???????0.012 | ??????????0.06 | ???????0.033 | ???????0.008 | ???????0.013 | ????????0.03 | ????????0.01 |
| Silicon | ????????1.96 | ??????????3.11 | ?????????6.5 | ???????0.229 | ????????15.7 | ???????0.515 | ?????????3.6 |
| Copper | ???????0.052 | ?????????0.001 | ???????0.015 | ???????0.024 | ???????0.002 | ???????0.017 | ???????0.006 |
| Nickel | ???????0.011 | ?????????0.028 | ???????0.014 | ???????0.025 | ???????0.001 | ???????0.025 | ???????0.004 |
| Chromium | ????????0.03 | ?????????0.006 | ???????0.001 | ???????0.033 | ????????0.01 | ????????0.03 | ???????0.005 |
| Molybdenum | ????????0.01 | ??????????0.01 | ????????0.01 | ????????0.01 | ????????0.01 | ????????0.01 | ????????0.01 |
| Tin | ????????0.02 | ??????????0.02 | ????????0.01 | ????????0.03 | ????????0.01 | ????????0.01 | ????????0.01 |
| Zinc | ???????0.386 | ?????????0.012 | ???????0.142 | ???????0.006 | ???????0.005 | ???????0.005 | ???????0.005 |
| Boron | ????????0.01 | ??????????0.01 | ????????0.01 | ????????0.01 | ????????1.67 | ????????0.05 | ????????0.06 |
| Titanium | ????????0.02 | ?????????0.005 | ???????0.018 | ???????0.033 | ???????0.228 | ???????0.046 | ???????0.021 |
| Arsenic | ???????0.005 | ?????????0.005 | ???????0.005 | ???????0.005 | ???????0.005 | ???????0.005 | ???????0.005 |
For present embodiment, graininess carbon is breeze (10400BTU), and IRM is the iron oxide dust of resulting byproduct in producing as photographic negative.For the analysis of difference initial substance in batches, and, all be shown among the following table E the cumulative analysis of iron reduzate.
The basic iron tests of table E
Example VI
| The project description | Form the initial iron substance of block | Iron product KMFE203 | |||
| The KMFE203 dust | The KMFE203 dust | The KMFE203 dust | The KMFE203 dust | ||
| Test # | ???????29.00 | ???????30.00 | ???????29.00 | ???????30.00 | ???????31.00 |
| Carbon | ???????0.030 | ???????0.030 | ???????0.030 | ???????0.030 | ???????3.020 |
| Sulphur | ???????0.020 | ???????0.025 | ???????0.020 | ???????0.025 | ???????0.022 |
| Iron | ??????60.500 | ??????63.600 | ??????60.500 | ??????63.600 | ??????88.200 |
| Manganese | ???????2.270 | ???????2.280 | ???????2.270 | ???????2.280 | ???????0.200 |
| Phosphorus | ???????0.003 | ???????0.003 | ???????0.003 | ???????0.003 | ???????0.032 |
| Silicon | ???????0.570 | ???????0.610 | ???????0.570 | ???????0.610 | ???????0.330 |
| Copper | ???????0.001 | ???????0.001 | ???????0.001 | ???????0.001 | ???????0.514 |
| Nickel | ???????0.007 | ???????0.006 | ???????0.007 | ???????0.006 | ???????0.114 |
| Chromium | ???????0.048 | ???????0.047 | ???????0.048 | ???????0.047 | ???????0.275 |
| Molybdenum | ???????0.010 | ???????0.010 | ???????0.010 | ???????0.010 | ???????0.090 |
| Tin | ???????0.010 | ???????0.020 | ???????0.010 | ???????0.020 | ???????0.030 |
| Zinc | ???????0.067 | ???????0.068 | ???????0.067 | ???????0.068 | ???????0.013 |
| Titanium | ???????0.027 | ???????0.030 | ???????0.027 | ???????0.030 | ???????0.015 |
For present embodiment, graininess carbon is coal dust, and identical in IRM and the EXAMPLE III.Analysis to iron and residue reduzate (percentage by weight) is shown among the following table F.
The basic iron tests of table F
Theoretical
| The project description | Residue thing from coal | Iron product from coal |
| Sample/test # | 33/9-21-37 | 34/9-21-37 |
| Carbon | ????????3.29 | ??????????2.74 |
| Sulphur | ????????0.02 | ??????????1.05 |
| Iron | ???????14.03 | ?????????89.10 |
| Manganese | ????????0.22 | ??????????0.55 |
| Phosphorus | ????????0.02 | ??????????0.01 |
| Silicon | ????????7.38 | ??????????1.65 |
| Copper | ????????0.00 | ??????????0.45 |
| Nickel | ????????0.01 | ??????????0.06 |
| Chromium | ????????0.03 | ??????????0.12 |
| Molybdenum | ????????0.01 | ??????????0.01 |
| Tin | ????????0.01 | ??????????0.04 |
| Zinc | ????????0.01 | ??????????0.01 |
| Titanium | ????????0.07 | ??????????0.05 |
It is believed that the present invention has aggregated into a kind of new long-chain polymer with the carbon granule that is contained in the carbon source, though also unrecognized, it structurally provides good adhesion for section bar.The oxide of known carbon can hydrolysis in water.This reaction has stayed the free carboxyl group ion that is present in the compound.
Adding the MEK that is mixed with additive is considered to for styrene polymer is connected with the free carbon ion, by the water with the absorption in the polymer exchange solvent.
In next step, introduced polyvinyl acetate.The existence of MEK is once more as the catalyst of removing and make acrylonitrile or styrene and polyvinyl acetate react.
The section bar of resulting compacting, block for example, ball shape thing, and/or the solid tablet that is squeezed into structurally be stable and store and processing procedure in can not revert back to fine particle.
Although the present invention describes with reference to several specific embodiments and embodiment, those skilled in the art will recognize that the multiple modification that does not depart from the scope of the invention and spirit is possible, and described in claim, the present invention's meaning will comprise change and the modification that all do not depart from spirit of the present invention.
Claims (18)
1. produce the method for section bar from trickle rich iron substance, this method comprises:
(a) mix rich iron substance and carbon source to form rich iron/carbon mix, flour is substantially free of oil and moisture content;
(b) styrene or acrylonitrile polymer are dissolved in the hygroscopicity solvent;
(c) styrene of mixed dissolution or acrylonitrile polymer, Fu Tie/carbon mix, calcium carbonate, and aluminosilicate aluminium adhesive;
(d) polyethylene polymer is carried out emulsification in water, emulsion is added in the mixing of step (c), and with product homogenizing basically; And
(e) will be pressed into section bar from the mixture of (d).
2. the polyethylene polymer that the process of claim 1 wherein is a polyvinyl alcohol.
3. the polyethylene polymer that the process of claim 1 wherein is a polyvinyl acetate.
4. the hydrochloric acid that the process of claim 1 wherein is to add in the mixed process of rich iron mixture and carbon source in step (a).
5. the process of claim 1 wherein that the mixture in (e) is pressed into section bar in cuber.
6. the process of claim 1 wherein that mixture in (e) is by being squeezed into section bar.
7. the method for claim 1 further comprises the heating section bar to remove the step of moisture content in the section bar.
8. the method for claim 1 further comprises section bar is introduced in the reaction environment with the iron in the reduction section bar.
9. the rich iron substance that the process of claim 1 wherein comprises heavy metal, and section bar is added in the stove so that heavy metal vaporization and reduced iron.
10. the method for claim 1, wherein to handle rich iron substance before in step (a), be about to rich irony and mix with non-mineral matter in the separated powder with surfactant and form surfactant and the softening agent of non-iron substance, and the dry powdery thing is so that softening agent vaporization and reduce water content.
11. according to the process of claim 1 wherein that section bar suppresses under about 30,000 pounds/square inch pressure.
12. contain methyl ethyl ketone according to the hygroscopic solvent that the process of claim 1 wherein.
13. from the method for trickle rich iron substance formation section bar, the step that this method comprises has polymerizing styrene or acrylonitrile under the situation that the composition that contains carbon source and rich iron substance exists, and makes composition form section bar under high pressing pressure.
14. form the method for section bar from trickle rich iron substance, the step that this method comprises has polyvinyl acetate added and contains in the composition of rich iron substance, described composition is connected with the product of carbon source by styrene or acrylonitrile polymer, and under high pressing pressure composition is formed section bar.
15. from the method for trickle rich iron substance formation section bar, the step that this method comprises has:
Mix tiny rich iron substance, carbon source, conditioning agent, and homopolymers;
Resultant mixture is pressed into section bar.
16. from the method for trickle rich iron substance manufacturing section bar, this method comprises;
(a) mix rich iron substance and carbon source forming rich iron/carbon mix, flour is not oil-containing and moisture content substantially;
(b) acrylonitrile polymer is dissolved in the hygroscopic solvent;
(c) acrylonitrile resin of mixed dissolution, Fu Tie/carbon mix, calcium carbonate, and aluminosilicate adhesive;
(d) emulsifiable polyethylene polymer in water adds the composition of step (c) and the basic homogenizing that will obtain with emulsion; And
(e) mixture with (d) is pressed into section bar.
17. section bar comprises rich iron substance and is connected in the carbon source that molecular carbon connects the site together by long-chain polymer.
18. the section bar of claim 17, long-chain polymer wherein comprises the compound that contains styrene or acrylonitrile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96194524A CN1187156A (en) | 1995-06-06 | 1996-02-08 | Process for recovering iron from iron-rich material |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/546,975 | 1995-10-23 | ||
| US08/468,104 | 1995-10-23 | ||
| CN96194524A CN1187156A (en) | 1995-06-06 | 1996-02-08 | Process for recovering iron from iron-rich material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1187156A true CN1187156A (en) | 1998-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96194524A Pending CN1187156A (en) | 1995-06-06 | 1996-02-08 | Process for recovering iron from iron-rich material |
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| Country | Link |
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| CN (1) | CN1187156A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102177263A (en) * | 2008-11-21 | 2011-09-07 | S.P.C.M.股份公司 | Method for agglomerating industrial dust, in particular using a briquetting technique |
| CN104138887A (en) * | 2014-07-24 | 2014-11-12 | 北方民族大学 | Method for curing chrome in fouling acid slag |
| CN109385318A (en) * | 2012-04-10 | 2019-02-26 | 首要金属科技奥地利有限责任公司 | Method and apparatus for carrying out briquet manufacture |
| US11819960B2 (en) | 2016-03-07 | 2023-11-21 | Illinois Tool Works Inc. | Methods and apparatus to switch a weld power output |
-
1996
- 1996-02-08 CN CN96194524A patent/CN1187156A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102177263A (en) * | 2008-11-21 | 2011-09-07 | S.P.C.M.股份公司 | Method for agglomerating industrial dust, in particular using a briquetting technique |
| CN102177263B (en) * | 2008-11-21 | 2014-07-02 | S.P.C.M.股份公司 | Method for agglomerating industrial dust, in particular using a briquetting technique |
| CN109385318A (en) * | 2012-04-10 | 2019-02-26 | 首要金属科技奥地利有限责任公司 | Method and apparatus for carrying out briquet manufacture |
| CN104138887A (en) * | 2014-07-24 | 2014-11-12 | 北方民族大学 | Method for curing chrome in fouling acid slag |
| US11819960B2 (en) | 2016-03-07 | 2023-11-21 | Illinois Tool Works Inc. | Methods and apparatus to switch a weld power output |
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