CN102168156B - Iron and aluminum melting separation method for complicated and hard-dressing aluminum and iron intergrowth ore - Google Patents
Iron and aluminum melting separation method for complicated and hard-dressing aluminum and iron intergrowth ore Download PDFInfo
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 212
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 135
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 105
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 238000000926 separation method Methods 0.000 title claims abstract description 48
- 238000002844 melting Methods 0.000 title claims abstract description 28
- 230000008018 melting Effects 0.000 title claims abstract description 28
- 230000009467 reduction Effects 0.000 claims abstract description 80
- 239000002893 slag Substances 0.000 claims abstract description 63
- 239000003034 coal gas Substances 0.000 claims abstract description 53
- 238000000034 method Methods 0.000 claims abstract description 52
- 239000007789 gas Substances 0.000 claims abstract description 41
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 31
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000001257 hydrogen Substances 0.000 claims abstract description 28
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910002091 carbon monoxide Inorganic materials 0.000 claims abstract description 12
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 8
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 8
- 239000007791 liquid phase Substances 0.000 claims abstract description 6
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 74
- 239000011707 mineral Substances 0.000 claims description 74
- 239000004411 aluminium Substances 0.000 claims description 43
- 239000001301 oxygen Substances 0.000 claims description 25
- 229910052760 oxygen Inorganic materials 0.000 claims description 25
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 21
- 239000003245 coal Substances 0.000 claims description 19
- 239000007921 spray Substances 0.000 claims description 17
- 239000008188 pellet Substances 0.000 claims description 15
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 14
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 14
- 239000004744 fabric Substances 0.000 claims description 14
- 239000004571 lime Substances 0.000 claims description 14
- 239000012071 phase Substances 0.000 claims description 14
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 claims description 12
- 239000000428 dust Substances 0.000 claims description 12
- 238000001465 metallisation Methods 0.000 claims description 12
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 238000002485 combustion reaction Methods 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 8
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 239000000446 fuel Substances 0.000 claims description 7
- 230000031068 symbiosis, encompassing mutualism through parasitism Effects 0.000 claims description 7
- 235000011089 carbon dioxide Nutrition 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 239000002817 coal dust Substances 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- 238000011282 treatment Methods 0.000 claims description 5
- 235000019738 Limestone Nutrition 0.000 claims description 4
- 230000004907 flux Effects 0.000 claims description 4
- 239000006028 limestone Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 235000009508 confectionery Nutrition 0.000 claims description 3
- 230000004927 fusion Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000003345 natural gas Substances 0.000 claims description 3
- 230000001590 oxidative effect Effects 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 2
- 229960001866 silicon dioxide Drugs 0.000 claims description 2
- 235000012239 silicon dioxide Nutrition 0.000 claims description 2
- PMVSDNDAUGGCCE-TYYBGVCCSA-L Ferrous fumarate Chemical compound [Fe+2].[O-]C(=O)\C=C\C([O-])=O PMVSDNDAUGGCCE-TYYBGVCCSA-L 0.000 claims 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 20
- 238000003723 Smelting Methods 0.000 abstract description 14
- 230000008569 process Effects 0.000 abstract description 14
- 230000002829 reductive effect Effects 0.000 abstract description 9
- 239000004568 cement Substances 0.000 abstract description 8
- 238000011084 recovery Methods 0.000 abstract description 8
- 239000002699 waste material Substances 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 230000005484 gravity Effects 0.000 abstract description 2
- 238000010079 rubber tapping Methods 0.000 abstract 1
- 238000006722 reduction reaction Methods 0.000 description 73
- 235000010755 mineral Nutrition 0.000 description 60
- 238000005453 pelletization Methods 0.000 description 15
- 238000005516 engineering process Methods 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 11
- 238000000605 extraction Methods 0.000 description 9
- 238000002386 leaching Methods 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 229910001570 bauxite Inorganic materials 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 239000012141 concentrate Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 3
- 239000000571 coke Substances 0.000 description 3
- 238000004939 coking Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000006253 efflorescence Methods 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 238000005188 flotation Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000007885 magnetic separation Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 206010037844 rash Diseases 0.000 description 2
- 238000011946 reduction process Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 2
- 238000004131 Bayer process Methods 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- 229910001608 iron mineral Inorganic materials 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- YOBAEOGBNPPUQV-UHFFFAOYSA-N iron;trihydrate Chemical compound O.O.O.[Fe].[Fe] YOBAEOGBNPPUQV-UHFFFAOYSA-N 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000010310 metallurgical process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000009856 non-ferrous metallurgy Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
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- Y02W30/54—
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention provides an iron and aluminum melting separation method for hard-dressing aluminum and iron intergrowth ore which is embedded in a complex way. The method comprises the following steps of: adding aluminum and iron intergrowth ore into a prereduction furnace (1), aerating carbon monoxide and/or hydrogen into the prereduction furnace (1) to partially reduce the aluminum and iron intergrowth ore, putting the partially reduced aluminum and iron intergrowth ore into a final reduction smelting and separation furnace (2), further performing final reduction on the aluminum and iron intergrowth ore through carbothermic high temperature, and tapping and deslagging respectively by utilizing the formation of an upper liquid phase and a lower liquid phase due to different specific gravities of molten iron and alumina-containing molten slag at high temperature so as to finish melting separation. By the method, the complete separation of iron and aluminum in the hard-dressing and complicated aluminum and iron intergrowth ore can be realized, and the high recovery rate of iron and aluminum is ensured and the comprehensive utilization of the complicated and hard-dressing aluminum and iron intergrowth ore is realized at the same time. Moreover, by the process, products such as iron, alumina, high-quality coal gas, cement, carbon dioxide and the like can be obtained, and exhaust gas and waste residue are not discharged; and the method has the characteristics of low energy consumption and high recovery rate.
Description
Technical field
The invention belongs to metallurgical technology field, relate to a kind of smelting technology method that completes the separation of high-temperature molten slag iron based on coal oxygen fused reduction method smelting ferro-aluminum mineral intergrowth.
Background technology
China's iron ore deposit is abundant, and total reserves is at the forefront in the world, but also shows following characteristics: (1) ore grade is on the low side, and in iron ore deposit, the overwhelming majority is the fewer lean ore of iron-holder simultaneously; (2) many metals mineral intergrowth occupies certain proportion, take iron in main ore often association the Coexisting Elements of recovery value is arranged, as vanadium titano-magnetite, rare earth mineral intergrowth, ferro-aluminum symbiotic iron ore etc.; (3) in ore, each valuable element is difficult to sorting, and especially many metals mineral intergrowth, be difficult to find effective means to realize effective separation the extraction of each element.Wherein, in China Guangxi, Guangdong, Anhui and the countries in Southeast Asia such as the India adjoined, Indonesia contain the complicated unmanageable ferro-aluminum symbiotic ore of a large amount of embedding cloth, be a kind of important iron ore and bauxite resource.This is because along with minimizing day by day of high grade, thin-graded iron ore resource, resource is tending towards dilution gradually, iron ore and bauxite price continue surging year after year, in the urgent need to relying on technical progress to develop to greatest extent the ferro-aluminum mineral intergrowth resource of the difficult choosing of these low-grade complexes, alleviate the pressure of domestic and international iron, bauxite resource shortage and iron ore, bauxite spurt in prices with this, for respective contribution is made in the comprehensive utilization of Natural Resources in China, so the present invention has important practical significance.
Aluminium in the ferro-aluminum symbiotic ore mainly is present in iron mineral with fine grain teeth cloth or with the isomorph form, the characteristics of this alferric mineral embedding cloth densification just, cause effectively realizing by the mode of ore dressing the monomer dissociation of aluminium and iron, make the compound mineral intergrowth of ferro-aluminum is typical difficult ore always, fails well to be developed.How utilizing a large amount of ferro-aluminum mineral intergrowth resources of storing up both at home and abroad, develop efficient ferro-aluminum isolation technique, realize the comprehensive utilization of ferro-aluminum mineral intergrowth resource, is ferrous metal smelting, is also that important technology and the technique that the non-ferrous metal extraction faces one of is challenged.In the ferro-aluminum mineral intergrowth, the grade of iron is relatively low, generally containing Fe
2o
3in 35～48% scopes, from the ferrous metallurgy angle, do not there is the economic value of extracting; Simultaneously the ferro-aluminum mineral intergrowth is rich in again the elements such as the aluminium that has in a large number higher economic worth, titanium, vanadium, gallium, wherein, and generally containing Al
2o
3in 20～40% scopes, from the nonferrous metallurgy angle, when the high efficiency extraction aluminum metal, the operations such as separating of grog roasting and ferro-aluminum have been needed again, so how the extraction of the extraction of iron and aluminium is combined, building technically and economically feasible technique, will be the key issue of comprehensive utilization ferro-aluminum mineral intergrowth.
Current Domestic is studied the ferro-aluminum separation method of ferro-aluminum mineral intergrowth outward, mainly is divided into three kinds of approach:
(1) first sort, rear smelting, the method by ore dressing becomes high-grade aluminium concentrate and iron ore concentrate by ore separation, then, by adopting corresponding technique separately, extracts aluminium and iron from concentrate separately.This approach comprises the classification of application hydrocyclone, disperse-flocculation, shaking table, the beneficiating method of the gravitational segregation of jigging, the application magnetic separation, magnetic separation-joint flotation technology, applied chemistry roasting-extract technology etc., this method is applicable to process alferric ore simple in structure, concern complexity for ferro-aluminum embedding cloth, the ore effect of poor-performing of dissociating is not obvious, its problem is no matter adopt gravity treatment, magnetic separation, flotation is in interior physical concentration flow process, or adopt the chemical mineral processing flow process of adding the chemical reagent leaching to be carried iron to it and fall aluminium, all because the granularity of the interior aluminium of this class ore and iron is all very thin, the inner ferro-aluminum hosting relation of ore complexity, cause on the one hand the rate of recovery of this method iron to be difficult to guarantee, Al in iron ore concentrate on the other hand
2o
3content still higher, be difficult to meet the Iron industry production requirement,
(2) iron after first aluminium, be that Bayer Process digestion aluminium/red mud reclaims iron process, this technique is for the more existing achievements in research of iron that reclaim in red mud, these achievements have the reference directive significance for the iron aluminium separation of ferro-aluminum symbiotic ore, for the method for carrying iron from iron red mud, according to relevant report both domestic and external, mainly can comprise reduction sintering process, direct-reduction process, magnetizing roasting method and smelting process, but in this processing requirement ore, with active silica, than high, the current technology of the iron of red mud recovery simultaneously all is difficult to guarantee the efficient oxidation aluminium on technology and economic benefit;
(3) aluminium after first iron, be that aluminium technique is put forward in blast furnace or electrosmelting iron/slag leaching, this technique can effectively realize that iron aluminium separates, and general the employing directly of this technique is used for blast furnace ironmaking by the ferro-aluminum mineral intergrowth, or is joined ore deposit through blast-furnace smelting with the low gangue content iron ore of higher-grade; If but subject matter is to adopt Al
2o
3the ferro-aluminum mineral intergrowth that content is higher is directly used in blast-furnace smelting, because of Al in its pelletizing or agglomerate
2o
3the more common pelletizing of content or agglomerate significantly improve, can cause slag viscosity and fusing point all to raise, thereby the slag fluidity variation affects smooth operation of furnace, sweetening power sharply descends, coke ratio significantly raises, blast furnace operating difficulty, the working of a furnace significantly worsen, although many investigators have carried out some useful explorations both at home and abroad, by improving feed stock for blast furnace quality, strengthening smelting operating duty and making for suppressing Al with the collocation of higher-grade iron ore
2o
3the negative impact that too high levels is brought sintering, ironmaking, but effect is unsatisfactory, and production cost increases substantially, and has very large limitation on industrial application, can not fundamentally solve the ferro-aluminum mineral intergrowth and enter the problem that blast-furnace smelting is difficult to walk.
In sum, although Chinese scholars has been carried out broad research to the ferro-aluminum separation of ferro-aluminum mineral intergrowth, concern the ferro-aluminum mineral intergrowth of complexity for embedding cloth, still lack at present cost-effective separation method.In fact, address this problem and must rethink on the whole from metallurgical technology, reasonably scheme is the extraction of efficiently dissociating that had both guaranteed technically iron aluminium, economically feasible on benefit again.Therefore, for fully utilizing the abundant ferro-aluminum mineral intergrowth resource of these class reserves, iron aluminium separation technology and the technique of exploitation efficient economy, the utilization ratio of raising ferro-aluminum mineral intergrowth, special proposition the present invention.
Summary of the invention
For above problem, the present invention proposes a kind of employing gas base prereduction-high temperature molten calcium aluminate slag-aluminium oxide extraction process that divide-prepares of reduction eventually, thereby fundamentally solved embedding cloth and concerned that the interior iron of ferro-aluminum symbiotic ore, the aluminium of complexity are difficult to a difficult problem of effectively separating, and realize the choosings of a large amount of difficulty, dull ferro-aluminum mineral intergrowth institute iron content, the thorough separation of aluminium valuable element.
The invention provides that a kind of embedding cloth is complicated, difficulty is selected ferro-aluminum mineral intergrowth iron aluminium melting separation method, said method comprising the steps of: the ferro-aluminum mineral intergrowth is packed in pre-reducing furnace, then to passing into carbon monoxide and/or hydrogen in pre-reducing furnace with partial reduction ferro-aluminum mineral intergrowth, then will by the ferro-aluminum mineral intergrowth of partial reduction, be put into the molten minute stove of reduction eventually, further it is carried out to whole reduction by the hot high temperature of carbon, utilize upper and lower two liquid phases of molten iron liquid formation different from salic slag proportion under high temperature to tap a blast furnace respectively and deslagging, separate to complete melting.
According to iron aluminium melting separation method of the present invention, wherein, the step of described partial reduction ferro-aluminum mineral intergrowth can comprise: the ferro-aluminum mineral intergrowth is directly added from the top of pre-reducing furnace, pass into reducing gas in the pre-reducing furnace bottom simultaneously, the reducing gas temperature range is 750 ℃～950 ℃, the reduction potential scope is 0.6～1.0, to make the metallization ferro-aluminum symbiosis pellet of degree of metalization in the 40%-90% scope.
According to iron aluminium melting separation method of the present invention, wherein, described whole reduction step can comprise: the ferro-aluminum symbiosis pellet that will metallize is sent in the molten minute stove of reduction eventually through the tremie pipe of pre-reducing furnace, 20%～40% the ratio in total fuel-weight ratio adds lump coal simultaneously, and add lime stone flux according to the content appropriateness of aluminum oxide in ore and silicon-dioxide, to keep in slag basicity at CaO/SiO
2=1.2 ± 0.3, CaO/Al
2o
3in=1.2 ± 0.2 scope; And spray into oxygen and coal dust that purity be greater than 90% molten dividing in stove by the coal-oxygen injection system to reducing eventually, coal sprays into than 60%～80% ratio in total fuel ratio, fuel ratio is 750 ± 200kg/tHM, spray into oxygen on reactor top simultaneously, the post-combustion rate that sprays into the ratio of upper and lower two portions oxygen in the molten minute stove of eventually reduction and coal gas by adjustment is controlled the oxidisability of gas temperature and coal gas in stove, post-combustion rate is controlled in 5%～45% scope, and corresponding in-furnace slag temperature is at 1650 ± 150 ℃.
According to iron aluminium melting separation method of the present invention, wherein, the full iron grade of described ferro-aluminum mineral intergrowth by weight can be more than 25%.
According to iron aluminium melting separation method of the present invention, wherein, described pre-reducing furnace can comprise fluidized-bed, shaft furnace, rotary hearth furnace or rotary kiln, and the molten minute stove of described reduction eventually can be oxygen coal fusion reducing furnace.
According to iron aluminium melting separation method of the present invention, wherein, described method also can comprise in the slag of discharging and adds lime to generate the step of calcium aluminate slag ore deposit phase.Preferably, the step that adds lime take in the described slag to discharging to generate calcium aluminate slag ore deposit phase can be drained in the phase setting device of slag ore deposit by the salic slag of high temperature in the molten minute stove of reduction eventually, and add wherein lime, the amount of allocating lime into must guarantee in slag that basicity is at CaO/SiO
2=2.0 ± 0.1, CaO/Al
2o
3in=1.4 ± 0.2 scope, so that resultant ore deposit phase is calcium aluminate slag by weight more than 90%.
According to iron aluminium melting separation method of the present invention, wherein, described method also can comprise that the coal gas of high temperature that described whole reduction step is produced carries out the step of rich hydrogen upgrading.Preferably, described rich hydrogen upgrading step can comprise: by coal gas of high temperature at first through hot tornado dust collector dedusting, dust sprays into the molten minute stove of reduction eventually again by the oxygen coal injection system, coal gas of high temperature after hot tornado dust collector purify enters the rich hydrogen upgrading of coal gas of high temperature stove, and be blended into close composition cooled coal gas or be blended into Sweet natural gas to the rich hydrogen upgrading of coal gas of high temperature stove, to realize upgrading or to utilize the coal gas of high temperature physical thermal and red-hot carbon bed carries out chemical reaction, by oxidizing gas CO
2and H
2o changes reducing gas CO and H into
2, improve the reduction potential chemical energy of coal gas and make its rich hydrogen.
According to iron aluminium melting separation method of the present invention, wherein, described method also can comprise the vent gas treatment recycling step that carbonic acid gas is separated and utilize by the carbon dioxide separation catching apparatus.
Compared with prior art, advantage of the present invention and/or characteristics mainly comprise following aspect:
(1) in the ferro-aluminum symbiotic ore that the present invention can make embedding cloth complicated difficult select, topmost two kinds of elemental irons are thoroughly separated with aluminium, realize that complicated difficult selects the comprehensive utilization of ferro-aluminum mineral intergrowth; But technological process direct production high quality molten iron, the rate of recovery of iron is more than 95%, follow-uply can adopt traditional iron and steel metallurgical process to obtain steel products; Technological process in ironmaking simultaneously, completes the mineral condition that builds extracting aluminum oxide in addition, for further extracting aluminum oxide, provides basis mutually, ore deposit;
(2) adopt smelting reduction process to substitute blast furnace ironmaking, coking, sintering and three operations of blast-furnace smelting are shortened to the melting and reducing operation, simplify Production Flow Chart, enhance productivity; And the dependence of whole technique STRENGTH ON COKE will be disengaged, briquet replacing coke direct production molten iron, effective use of energy sources, can alleviate the dependence of Iron And Steel Industry to coking coal resource, will significantly reduce the smelting cost of ironmaking production;
(3) due to this process using pure oxygen technology, nonnitrogenous gas and NO in tail gas
x, more be conducive to CO
2separation, catch and store up, this technique can realize significantly reducing harmful NO
xwith greenhouse gases CO
2discharge, and leach Al
2o
3after the waste major ingredient be 2CaOSiO
2and CaCO
3, can be used for producing cement, realize discharging without waste, be conducive to environment protection.
The present invention can make China store that the abundant characteristic iron ores such as ferro-aluminum mineral intergrowth become can the low-cost strategic resource of smelting, and can effectively alleviate the dependence on external supply in China's steel industry iron ore source.And along with being becoming tight the day of coking coal supply and, to the increasingly stringent of environmental requirement, the advantage of this research becomes more outstanding.Therefore; the present invention has realized the thorough separation of ferro-aluminum mineral intergrowth and has extracted respectively; adopt the melting and reducing slag iron isolation technique of new generation that is conducive to environment protection, realized being utilized as center with resource and high efficiency of energy, realized iron production and aluminium production idea and technical innovation.
The accompanying drawing explanation
Fig. 1 shows the example flow diagram based on prereduction-molten minute ferro-aluminum mineral intergrowth of reduction at end according to an exemplary embodiment of the present invention.In accompanying drawing: 1 is pre-reducing furnace, and 2 is the molten minute stove of reduction eventually, and 3 is the rich hydrogen upgrading of coal gas of high temperature stove, 4 is hot cyclone separator, and 5 is the carbon dioxide separation catching apparatus, and 6 is the oxygen coal injection system, 7 is slag ore deposit phase setting device, and 8 is alumina leaching and calciner, and 9 is cement manufacture plant.
Embodiment
Below in conjunction with each relevant device shown in the drawings, for the present invention, be elaborated.
The reduction apparatus that technique of the present invention is used mainly contains two, and one is metallurgical reduction pre-reducing furnace 1 commonly used, can select fluidized-bed, shaft furnace, rotary hearth furnace or rotary kiln; Another core metallurgical equipment is the molten minute stove 2 of reduction eventually, and it can be oxygen coal fusion reducing furnace, when being smelted iron in the molten minute stove 2 of whole reduction, completes the separation that embedding cloth complicated difficult selects the ferro-aluminum mineral intergrowth.Technical process of the present invention is to install among pre-reducing furnace washing ferro-aluminum mineral intergrowth fine ore after mud or pelletizing, then pass into the part ferriferous oxide in carbon monoxide and hydrogen reducing fine ore or pellet in pre-reducing furnace, then will by the fine ore of gas phase partial reduction or pelletizing, be put into the molten minute stove of reduction eventually, further it is carried out to whole reduction by the hot high temperature of carbon, utilize upper and lower two liquid phases of molten iron liquid formation different from salic slag proportion under high temperature, tap a blast furnace respectively and deslagging, realize that metallic iron and the thorough of slag separate; Add lime in the slag of discharging, and control the add-on of lime, make it to occur chemical reaction, generate and be beneficial to the calcium aluminate slag ore deposit phase of extracting aluminum oxide, for follow-up final extraction aluminum oxide is established the mineral basic condition.
Embodiment 1
Fig. 1 shows the example flow diagram based on prereduction-molten minute ferro-aluminum mineral intergrowth of reduction at end according to an exemplary embodiment of the present invention.As shown in Figure 1, this exemplary embodiment provides a kind of embedding cloth complexity, difficulty to select ferro-aluminum mineral intergrowth iron aluminium melting separation method, described method comprises: the pellet of ferro-aluminum mineral intergrowth is packed in pre-reducing furnace 1, then to passing into carbon monoxide and/or the hydrogen pellet with partial reduction ferro-aluminum mineral intergrowth in pre-reducing furnace 1, thereby the pellet that the forming section ferric oxide is reduced, i.e. partially metallised ferro-aluminum mineral intergrowth.Then by being packed into by the pellet of partial reduction, reduction eventually is molten to divide in stove 2, further it is carried out to whole reduction by the hot high temperature of carbon, utilize molten iron liquid under high temperature different with salic slag proportion and form the phenomenon of upper and lower two liquid phases, tap a blast furnace respectively and deslagging,, difficulty complicated to embedding cloth to complete selects ferrous metal in the ferro-aluminum mineral intergrowth and the melting of aluminum metal separate and recycle.
Embodiment 2
According to one exemplary embodiment of the present invention, embedding cloth is complicated, difficulty selects ferro-aluminum mineral intergrowth iron aluminium melting separation method to comprise the following steps.
1. iron-bearing mineral prereduction.Ferro-aluminum mineral intergrowth fine ore or the pellet washed after mud are directly added from the top of pre-reducing furnace 1, pass into reducing gas in pre-reducing furnace 1 bottom, the reducing gas temperature range is 750 ℃, and the reduction potential scope is 0.6 simultaneously.In oxides-containing iron in the interior alferric symbiosis of pre-reducing furnace 1 pellet and reducing gas, carbon monoxide or hydrogen carry out reduction reaction, and a part of iron-bearing mineral wherein is reduced, and obtain degree of metalization and reach 40% direct-reduction metallization ferro-aluminum symbiosis pelletizing.Here, preferably, consider the abundant saving of the energy, reinstall in prereduction 1 stove after can utilizing the tail gas of pre-reducing furnace 1 that alferric symbiosis pellet is preheating to 200～250 ℃.
2. iron-bearing mineral reduces eventually and melts separation.Direct-reduction is metallized to the ferro-aluminum pelletizing in the tremie pipe of pre-reducing furnace 1 is sent to the molten minute stove 2 of reduction eventually, 20% the ratio in total fuel-weight ratio adds lump coal simultaneously, and add lime stone flux according to how many appropriateness of aluminum oxide in ore and dioxide-containing silica, take this, to keep basicity in slag be CaO/SiO
2=0.9, CaO/Al
2o
3=1.0, and be greater than 95% oxygen and the coal dust of ordinary blast winding-up use by coal-oxygen injection system 6 to spraying into purity in the whole molten minute stove 2 of reduction, ratio by coal dust by total fuel-weight ratio 80% sprays into, fuel ratio is about 550kg/tHM, spray into oxygen on reactor top simultaneously, the post-combustion rate that sprays into the ratio of the whole molten minute interior upper and lower two portions oxygen of stove 2 of reduction and coal gas by adjustment is controlled the oxidisability of gas temperature and coal gas in stove, post-combustion rate is controlled as approximately 5%, corresponding in-furnace slag temperature is about 1500 ℃, make the metallic iron be reduced all be fused into molten iron, and slag all presents molten state, then tap a blast furnace respectively and deslagging, the reduction at end that completes direct-reduction metallization ferro-aluminum pelletizing separates with the thorough of slag iron, now the product of the molten minute stove 2 of reduction comprises molten iron, coal gas and salic slag eventually.
3. slag reclaims aluminum oxide.The salic slags of high temperature that reduction is melted in minute stove 2 eventually are drained in slag ore deposit phase setting device 7, and add wherein lime, the amount of allocating lime into must guarantee that the basicity of slag is CaO/SiO
2=1.9, CaO/Al
2o
3=1.2, make it resultant ore deposit phase by weight 90% for calcium aluminate slag, through conventional aluminium oxide, leach and calciner 8, the roasting of carrying out 3 hours obtains alumina product, its corresponding castaway slag main component is 2CaOSiO
2and CaCO
3material, can produce cement products through cement manufacture plant 9.
4. the rich hydrogen upgrading of coal gas of high temperature.The molten minute stove 2 of reduction eventually of the present invention is when obtaining molten iron and salic slag, also can produce a large amount of coal gas of high temperature, gas temperature is 1450 ℃, at first coal gas of high temperature enters the rich hydrogen upgrading of coal gas of high temperature stove 3, the mode of the rich hydrogen upgrading of coal gas of high temperature stove 3 upgrading coal gas is: utilize coal gas of high temperature physical thermal and red-hot carbon bed to carry out chemical reaction, by oxidizing gas CO
2and H
2o changes reducing gas CO and H into
2carry out Fu Qing when improving gas reduction gesture chemical energy, coal gas its temperature after upgrading is down to 950 ℃, coal gas after cooling is through hot tornado dust collector 4 dedustings, dust can spray into the molten minute stove 2 of reduction eventually again by oxygen coal injection system 6, the part of the coal gas after hot tornado dust collector 4 purify can enter pre-reducing furnace 1, for pre-reducing furnace provides reductive agent and heat.
5. vent gas treatment.The tail gas that the interior material of pre-reducing furnace 1 carries out producing after the prereduction reaction only comprises carbon monoxide, carbonic acid gas, hydrogen and water vapor, can carry out carbon dioxide separation by carbon dioxide separation catching apparatus 5, high quality coal gas after separation and another part surplus gas produced from the rich hydrogen upgrading of coal gas of high temperature stove 3 are drawn by pipeline, can the outer user of plenum system use, also can partly supply with follow-up alumina leaching and calciner 8 uses, the carbonic acid gas part of trapping can offer other chemical industry user, a part can be stored up, subsequent handling alumina leaching and calciner 8 that another part also can be supplied with this technique are used.
Embodiment 3
The present embodiment is substantially the same manner as Example 2, and difference is, the reducing gas temperature range that pre-reducing furnace 1 bottom passes into is 950 ℃, and the reduction potential scope is 1.0; The degree of metalization of the pellet reduced through preheating reduction furnace 1 is 90%; In whole reduction step, the fuel ratio of the fuel be comprised of the coal dust of 40% lump coal by weight and 60% is about 950kg/tHM, and the basicity of slag is CaO/SiO
2=1.5, CaO/Al
2o
3=1.4, post-combustion rate is controlled and is about 45%, and corresponding in-furnace slag temperature is about 1800 ℃; At slag, reclaim in the step of aluminum oxide, the basicity of slag is CaO/SiO
2=2.1, CaO/Al
2o
3=1.6, to give birth in resultant and contain 98% calcium aluminate slag by weight, roasting time is 2 hours; In the rich hydrogen upgrading of coal gas of high temperature step, gas temperature is 1850 ℃, the mode of gas reforming is: adopt to be blended into close composition cooled coal gas or to be blended into Sweet natural gas in the upgrading stove and realize upgrading, when completing cooling, make reduction potential and the Fu Qing degree of coal gas significantly improve, coal gas its temperature after upgrading is down to 750 ℃.
Embodiment 4
In another exemplary embodiment according to the present invention, embedding cloth is complicated, difficulty selects ferro-aluminum mineral intergrowth iron aluminium melting separation method to comprise the following steps.
1. ore grinding granulation.Will be containing Fe by disintegrating apparatus
2o
3be 41.2%, containing Al
2o
3be 27.5%, in ore, alumina silica ratio A/S is about 3 the ferro-aluminum mineral intergrowth raw material crushing fine ore to 8mm, then make the mineral pulvis of its efflorescence to granularity to 0.06mm through ore grinding, then the mineral pulvis being washed to mud processes, the efflorescence mineral pulvis that to wash again after mud is allocated common mining pelletizing binding agent and water into, insert in agglomeration equipment and carry out pelletizing, its pelletizing group diameter is 15-35mm, forms granularity alferric pellet comparatively uniformly.
2. iron-bearing mineral prereduction.The reduction shaft furnace 1 of packing into after utilizing reduction shaft furnace tail gas to be preheating to approximately 230 ℃ the alferric pelletizing, pass into reducing gas in reduction shaft furnace 1 bottom, and the reducing gas temperature is 800 ℃, and reduction potential is 0.95 simultaneously.Oxides-containing iron in the interior alferric pellet of reduction shaft furnace 1 and the carbon monoxide in reducing gas or hydrogen carry out reduction reaction, and a part of iron-bearing mineral wherein is reduced, and obtain degree of metalization and reach 80% direct-reduction metallization ferro-aluminum pelletizing.
3. iron-bearing mineral reduction and fusing separation eventually.To enter the molten minute stove 2 of reduction eventually through the tremie pipe of reduction shaft furnace 1 through the metallization ferro-aluminum pelletizing of direct-reduction, add the lump coal of 200kg/tHM and the lime stone flux of 132.5kg/tHM, slag basicity CaO/SiO simultaneously
2=1.4, CaO/Al
2o
3=1.3, and by coal-oxygen injection system 6 to spraying into oxygen that purity is 93% and the coal dust of ordinary blast winding-up use in the whole molten minute stove 2 of reduction, coal is than being 530kg/tHM, spray into oxygen on reactor top simultaneously, the post-combustion rate that sprays into the ratio of the whole molten minute interior upper and lower two portions oxygen of stove 2 of reduction and coal gas by adjustment is controlled the oxidisability of gas temperature and coal gas in stove, post-combustion rate is controlled at 25%, corresponding in-furnace slag temperature is at 1650 ℃, make the metallic iron be reduced all be fused into molten iron, and slag all presents molten state, then tap a blast furnace respectively and deslagging, the reduction at end that completes direct-reduction metallization ferro-aluminum pelletizing separates with the thorough of slag iron, now the product of the molten minute stove 2 of reduction comprises molten iron, coal gas and salic slag eventually.
4. slag reclaims aluminum oxide.The salic slags of high temperature that reduction is melted in minute stove 2 eventually are drained in slag ore deposit phase setting device 7, and add wherein lime, allocate lime into and make CaO/SiO in slag
2=2.0, CaO/Al
2o
3=1.4, resultant 100% is all calcium aluminate slag, through conventional aluminium oxide, leaches and calciner 8, and the roasting of carrying out 2.5 hours obtains alumina product, and its corresponding castaway slag main component is 2CaOSiO
2and CaCO
3material, can produce cement products through cement manufacture plant 9.
5. the rich hydrogen upgrading of coal gas of high temperature.At first the coal gas of high temperature that the molten minute stove 2 of reduction produces eventually enters the rich hydrogen upgrading of coal gas of high temperature stove 3, coal gas its temperature after upgrading is down to 800 ℃, coal gas after cooling enters hot tornado dust collector 4 dedustings, dust sprays into the molten minute stove 2 of reduction eventually again by oxygen coal injection system 6, coal gas after hot tornado dust collector 4 purify enters reduction shaft furnace 1, for reduction shaft furnace 1 provides reductive agent and heat.
6. vent gas treatment.The tail gas that the interior material of reduction shaft furnace 1 carries out producing after the prereduction reaction only comprises carbon monoxide, carbonic acid gas, hydrogen and water vapor, carry out carbon dioxide separation by carbon dioxide separation catching apparatus 5, high quality coal gas after separation and another part surplus gas produced from the rich hydrogen upgrading of coal gas of high temperature stove 3 are drawn by pipeline, plenum system outer user used, the carbonic acid gas of trapping has 30% to offer other chemical industry user, and another 70% subsequent handling alumina leaching and the calciner 8 of supplying with this technique used.
In sum, the principal character of this technical process is to prepare calcium aluminate slag one leaching roasting aluminium oxide extraction process to carrying out the whole reduction one of gas base prereduction-high temperature after ferro-aluminum mineral intergrowth pelletizing.Technique of the present invention is compared from other technique or invention remarkable differently is that reduction eventually realizes thoroughly separating of the difficult iron that selects complicated ferro-aluminum mineral intergrowth, aluminium in molten minute, guarantee the high-recovery of iron, aluminium simultaneously, and realize that complicated difficult selects the comprehensive utilization of ferro-aluminum mineral intergrowth, technique of the present invention was both also discharged without waste residue without waste gas, the product that can obtain comprises iron, aluminum oxide, high quality coal gas, cement and carbonic acid gas, and technique of the present invention is the process for cleanly preparing of a less energy-consumption, high-recovery.
Claims (8)
1. an embedding cloth complexity, difficulty are selected ferro-aluminum mineral intergrowth iron aluminium melting separation method, it is characterized in that comprising the following steps:
The ferro-aluminum mineral intergrowth is packed in pre-reducing furnace (1), then to passing into carbon monoxide and/or hydrogen in pre-reducing furnace (1) with partial reduction ferro-aluminum mineral intergrowth, then will by the ferro-aluminum mineral intergrowth of partial reduction, be put into the molten minute stove (2) of reduction eventually, further it is carried out to whole reduction by the hot high temperature of carbon, utilize upper and lower two liquid phases of molten iron liquid formation different from salic slag proportion under high temperature to tap a blast furnace respectively and deslagging, to complete melting, separate, wherein
The step of described partial reduction ferro-aluminum mineral intergrowth comprises: the ferro-aluminum mineral intergrowth is directly added from the top of pre-reducing furnace (1), pass into reducing gas in pre-reducing furnace (1) bottom simultaneously, the reducing gas temperature range is 750 ℃～950 ℃, the reduction potential scope is 0.6～1.0, to make the metallization ferro-aluminum symbiosis pellet of degree of metalization in the 40%-90% scope;
Described whole reduction step comprises: the ferro-aluminum symbiosis pellet that will metallize is sent in the molten minute stove (2) of reduction eventually through the tremie pipe of pre-reducing furnace (1), 20%～40% the ratio in total fuel-weight ratio adds lump coal simultaneously, and add lime stone flux according to the content appropriateness of aluminum oxide in ore and silicon-dioxide, to keep in slag basicity at CaO/SiO
2=1.2 ± 0.3, CaO/Al
2o
3in=1.2 ± 0.2 scope; And spray into oxygen and coal dust that purity be greater than 90% molten dividing in stove (2) by coal-oxygen injection system (3) to reducing eventually, coal sprays into than 60%～80% ratio in total fuel ratio, fuel ratio is 750 ± 200kg/tHM, spray into oxygen on reactor top simultaneously, spray into to reduce eventually by adjustment and melt ratio and the interior gas temperature of post-combustion rate control stove of coal gas and the oxidisability of coal gas of dividing upper and lower two portions oxygen in stove (2), post-combustion rate is controlled in 5%～45% scope, and corresponding in-furnace slag temperature is at 1650 ± 150 ℃.
2. ferro-aluminum mineral intergrowth iron aluminium melting separation method according to claim 1, is characterized in that, the full iron grade of described ferro-aluminum mineral intergrowth is by weight more than 25%.
3. ferro-aluminum mineral intergrowth iron aluminium melting separation method according to claim 1, is characterized in that, described pre-reducing furnace (1) comprises fluidized-bed, shaft furnace, rotary hearth furnace or rotary kiln, and the molten minute stove (2) of described reduction eventually is oxygen coal fusion reducing furnace.
4. according to the described ferro-aluminum mineral intergrowth of any one in claims 1 to 3 iron aluminium melting separation method, it is characterized in that, described method also comprises in the slag of discharging and adds lime to generate the step of calcium aluminate slag ore deposit phase.
5. ferro-aluminum mineral intergrowth iron aluminium melting separation method according to claim 4, it is characterized in that, the step that adds lime take in the described slag to discharging to generate calcium aluminate slag ore deposit phase is drained in slag ore deposit phase setting device (7) as the salic slag of high temperature by the molten minute stove (2) of reduction eventually, and add wherein lime, the amount of allocating lime into must guarantee in slag that basicity is at CaO/SiO
2=2.0 ± 0.1, CaO/Al
2o
3in=1.4 ± 0.2 scope, so that resultant ore deposit phase is calcium aluminate slag by weight more than 90%.
6. according to the described ferro-aluminum mineral intergrowth of any one in claims 1 to 3 iron aluminium melting separation method, it is characterized in that, described method also comprises that the coal gas of high temperature that described whole reduction step is produced carries out the step of rich hydrogen upgrading.
7. ferro-aluminum mineral intergrowth iron aluminium melting separation method according to claim 6, it is characterized in that, described rich hydrogen upgrading step comprises: by coal gas of high temperature at first through hot tornado dust collector (4) dedusting, dust sprays into the molten minute stove (2) of reduction eventually again by oxygen coal injection system (6), coal gas of high temperature after hot tornado dust collector (4) purify enters the rich hydrogen upgrading stove (3) of coal gas of high temperature, and be blended into close composition cooled coal gas or be blended into Sweet natural gas to the rich hydrogen upgrading stove of coal gas of high temperature (3), to realize upgrading or to utilize the coal gas of high temperature physical thermal and red-hot carbon bed carries out chemical reaction, by oxidizing gas CO
2and H
2o changes reducing gas CO and H into
2, improve the reduction potential chemical energy of coal gas and make its rich hydrogen.
8. according to the described ferro-aluminum mineral intergrowth of any one iron aluminium melting separation method in claims 1 to 3 or 5 or 7, it is characterized in that, described method also comprises the vent gas treatment recycling step that carbonic acid gas is separated and utilize by carbon dioxide separation catching apparatus (5).
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| CN102311812A (en) * | 2011-09-05 | 2012-01-11 | 东北大学 | Apparatus and method for cooling and modification of converter gas |
| CN102816880B (en) * | 2012-08-17 | 2014-04-02 | 东北大学 | Ironmaking and aluminum extraction comprehensive utilization method of high-iron red mud |
| CN102851425B (en) * | 2012-08-17 | 2014-10-08 | 东北大学 | Method for high-efficiency separation and comprehensive utilization of iron, aluminum and sodium in high-iron red mud |
| CN102925710B (en) * | 2012-11-23 | 2015-03-04 | 攀枝花钢城集团有限公司 | Preparation method for non-metallurgical aluminum oxide |
| CN103014214A (en) * | 2013-01-11 | 2013-04-03 | 钢铁研究总院 | Method for realizing combined extraction of iron and aluminum oxide in iron-aluminum complex ore |
| CN103667576A (en) * | 2013-10-15 | 2014-03-26 | 北京神雾环境能源科技集团股份有限公司 | Metal smelting method |
| CN103667701A (en) * | 2013-10-15 | 2014-03-26 | 北京神雾环境能源科技集团股份有限公司 | Metal smelting method |
| CN103866078B (en) * | 2014-02-11 | 2016-01-20 | 东北大学 | A point method for comprehensive utilization is melted in the prereduction of a kind of high-iron bauxite shaft furnace |
| CN104374669B (en) * | 2014-11-19 | 2017-02-22 | 东北大学 | Direct reduction and smelting reduction linked testing device and use method thereof |
| CN106929665A (en) * | 2017-03-14 | 2017-07-07 | 江苏省冶金设计院有限公司 | A kind of system and method for processing high-iron bauxite |
| TWI699504B (en) * | 2019-09-20 | 2020-07-21 | 中國鋼鐵股份有限公司 | Apparatus for producing direct reduced iron via carbothermic reduction reaction |
| CN113667788A (en) * | 2021-06-29 | 2021-11-19 | 首钢京唐钢铁联合有限责任公司 | Non-blast furnace ironmaking equipment and comprehensive metallurgical dust utilization method |
| CN113999947A (en) * | 2021-11-02 | 2022-02-01 | 武汉科技大学 | Additive for separating slag iron of high-aluminum iron ore smelting and separation method |
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