CN1022579C - Preparation method of reduced ilmenite powder - Google Patents
Preparation method of reduced ilmenite powder Download PDFInfo
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- CN1022579C CN1022579C CN 88103956 CN88103956A CN1022579C CN 1022579 C CN1022579 C CN 1022579C CN 88103956 CN88103956 CN 88103956 CN 88103956 A CN88103956 A CN 88103956A CN 1022579 C CN1022579 C CN 1022579C
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- Prior art keywords
- reduction
- titanium
- ilmenite
- titanium concentrate
- iron
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- YDZQQRWRVYGNER-UHFFFAOYSA-N iron;titanium;trihydrate Chemical compound O.O.O.[Ti].[Fe] YDZQQRWRVYGNER-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 230000002829 reductive effect Effects 0.000 title claims abstract description 38
- 239000000843 powder Substances 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title claims abstract 4
- 239000012141 concentrate Substances 0.000 claims abstract description 18
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000010936 titanium Substances 0.000 claims abstract description 17
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 17
- 238000003466 welding Methods 0.000 claims abstract description 15
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000007787 solid Substances 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 5
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 12
- 230000003647 oxidation Effects 0.000 claims description 5
- 238000007254 oxidation reaction Methods 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 4
- 238000004321 preservation Methods 0.000 claims 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 46
- 239000000047 product Substances 0.000 abstract description 25
- 238000000034 method Methods 0.000 abstract description 19
- 239000011248 coating agent Substances 0.000 abstract description 18
- 238000000576 coating method Methods 0.000 abstract description 18
- 229910052742 iron Inorganic materials 0.000 abstract description 17
- 230000001590 oxidative effect Effects 0.000 abstract description 7
- 239000012535 impurity Substances 0.000 abstract description 6
- 239000007795 chemical reaction product Substances 0.000 abstract description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- 231100000989 no adverse effect Toxicity 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 description 21
- 238000006722 reduction reaction Methods 0.000 description 20
- 239000000126 substance Substances 0.000 description 20
- 239000004615 ingredient Substances 0.000 description 12
- 238000009826 distribution Methods 0.000 description 9
- 229910052500 inorganic mineral Inorganic materials 0.000 description 9
- 239000011707 mineral Substances 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 8
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 8
- 230000009970 fire resistant effect Effects 0.000 description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- 239000000571 coke Substances 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000012856 packing Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000013467 fragmentation Methods 0.000 description 3
- 238000006062 fragmentation reaction Methods 0.000 description 3
- 238000002791 soaking Methods 0.000 description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical group [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- 229910001200 Ferrotitanium Inorganic materials 0.000 description 2
- 241000628997 Flos Species 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 238000007885 magnetic separation Methods 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 238000011946 reduction process Methods 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 235000010215 titanium dioxide Nutrition 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 206010067482 No adverse event Diseases 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 239000002802 bituminous coal Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000004453 electron probe microanalysis Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000010433 feldspar Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000010438 granite Substances 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 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
- 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 1
- 238000002386 leaching Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 238000007363 ring formation reaction Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 235000012222 talc Nutrition 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 229910052861 titanite Inorganic materials 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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Abstract
The invention discloses a preparation method and application of reduced ilmenite powder, and belongs to the technical field of metal preparation by dry reduction of titanium concentrate by using a solid carbon reducing agent. The method comprises two steps of oxidizing and roasting a titanium concentrate raw material and then carrying out two-stage reduction by using a solid carbon reducing agent. The raw materials have high content of Ca, Mg, Al and other impurity elements, the oxides of the impurity elements have no adverse effect on the end products, and the products of iron and titanium resources and reduction products can be comprehensively utilized to prepare the coating of the welding electrode coating.
Description
The invention belongs to ilmenite concentrate and produce the alloying technology field with the reduction of solid carbonaceous reducing agent dry method.
The multiple ilmenite concentrate treatment process that is adopted in the world at present is the back to be handled in the ilmenite concentrate reduction adopt forms such as magnetic separation separation, leaching, and iron, titanium are separated, and obtains products such as rich titanium material, iron powder, ferro-titanium, TiO 2 pigment.
United States Patent (USP) No. 3875286, No. 4019898 and No. 1431480 proposes ilmenite reduction is handled, and makes the iron in the mineral become metallic iron or iron protoxide, taps a blast furnace with rare mineral acid dipping dissolving, titanium, iron is separated, to obtain high-grade rich titanium material.
No. 3765868, United States Patent (USP) proposes to handle ilmenite with electric furnace smelting process, to obtain iron and titanium slag.
No. 4288417, United States Patent (USP) proposes to allow ilmenite powder and diluted acid react, and makes the oxyhydroxide of titanium after the hydrolysis, obtains TiO 2 pigment after roasting.
No. 3966455, United States Patent (USP), proposition directly utilizes the particulate state ilmenite powder and does not remove oxide compound in advance, produces the high-grade ferro-titanium.
English Patent No. 754453, No. 791366, proposition use the reduction magnetic method to handle ilmenite, with ilmenite levigate magnetic separation separation behind the direct solid state reduction in electric furnace, rotary kiln, obtain TiO
2Higher rich titanium material and iron content 93%, TiO
25% metal iron powder is used Electric furnace steel making behind the sintering.
No. 3850615, United States Patent (USP) proposes use the fluid bed reduction titaniferous ore, and the ferriferous oxide that reduces in the mineral with thicker relatively solid carbon reductive agent is a metallic state, and thin relatively reductive agent is suspended in the fluidized-bed and provides heat energy for reaction.In this technological process, titaniferous ore will mix with reductive agent in reactor 950 ℃ of following preheatings, again by reformed gas (as CO+H
2) deliver to and carry out reduction reaction in the fluidized-bed reactor, and then deliver to and isolate the reduction mineral in the cyclone separator.Therefore, this complex technical process, operation is various.In addition, this technology also requires:
(1) titaniferous ore is had granularity requirements, the main particle size range of used titaniferous ore 20～60% is greatly about 80～100 orders, and above-mentioned ore will be preheating to 900～1100 ℃, and institute's iron content occurs with ferrous form;
(2) solid carbon reductive agent size-grade distribution is had requirement, basic size composition is 20～150 orders, and 40～80% of reductive agent weight percentage must be through preheating.Above-mentioned reductive agent grain graininess is that 20～40 purposes account for 25% at least, and about 80～150 purpose fine particles are no less than 25%.
Above-mentioned various technology generally can not be utilized the iron resources in the mineral.Although the reduction magnetic method can fully utilize titanium, iron resources, for containing the high mineral of Mg, reduce easy ring formation, sticking kiln with rotary kiln, make process be difficult to carry out.And above-mentioned polytechnic end product such as titanium alloy, iron powder, titanium white etc., all do not allow more impurity element and exist.Therefore, contain S with above-mentioned the whole bag of tricks processing, Ca, Mg, Al is high and also contains some other impurity elements, and compact structure, FeO/Fe
2O
3The granular ilmenite that ratio is big, for example the Flos Bombacis Malabarici ilmenite concentrate is very inappropriate.
The objective of the invention is, according to containing S, Ca, Mg, the characteristics of the ilmenite concentrate that Al is high, Ca in the raw material, Mg, the oxide compound of impurity elements such as Al has no adverse effects to its end product, with fairly simple method, make the reduced ilmenite powder that chemical coating of welding electrode coating is used, the comprehensive utilization natural resources, iron, titanium are also used.
The present invention is for No. 3850615 a documents with United States Patent (USP), and the method that this patent proposes is, the ferriferous oxide that reduces in the titaniferous ore with the solid carbon reductive agent in fluidized-bed is a metallic state.The weak point of this technology is, not only complex process, and reductive agent is mixed with breeze, and the reaction back is separated by swirler, still contains carbon in the reduction mineral, and the Fe granularity after the reduction is very thin, can not be used to make chemical coating of welding electrode coating.
Method of the present invention is to adopt to contain TiO
247～50%, compact structure, FeO/Fe
2O
3The ilmenite concentrate of the granular ilmenite type of ratio 〉=5 carries out oxidizing roasting on electric furnace or sinter machine, maturing temperature is 790～890 ℃, and roasting time is with S content height and FeO/Fe in the raw material
2O
3Ratio size and decide Fe in the product of roasting
2O
3Content and take off S and lead with the time and be directly proportional is generally with S content in the product＜0.03% degree of being.Ilmenite after the oxidizing roasting adds the lid layer reductive agent above with in the fire proofed wood batch can of packing between powdered form and reductant layer.Reductive agent can be used high-carbon fuel such as charcoal, coke breeze, low-sulfur hard coal, bituminous coal, graphite, refinery coke, and its granularity is generally 0～15mm, is good with 1～5mm, and granularity is little, and specific surface is big, and active good, reducing power is good.The 120%(weight of the theoretical mixed carbon comtent of the ilmenite concentrate of the add-on of reductive agent after) greater than oxidizing roasting.Fire-resistant can after installing is sent into and is carried out two-stage reduction in tunnel furnace or the electric furnace, and the first stage of reduction temperature is 1140 ± 25 ℃, soaking time 〉=4 hour.After reduction ratio reaches more than 90%, be warmed up to 1240 ± 25 ℃, insulation again, soaking time 〉=30 minute are continued reduction and also being allowed the metal abrasive grit assemble to grow up, and soaking time is according to the requirement of product granularity is decided.Cooling is come out of the stove when temperature drops to 750 ℃ then, adopts protection to be quickly cooled to room temperature, to avoid the oxidation again of as-reduced iron.Subsequently thing in the fire-resistant can is poured on the screen cloth in 15mm aperture and sieved, make the reduzate and remaining reductive agent, ash separation of caking.The reduzate Universal ball grinding machine of packing into after the surface-conditioning dedust carries out fragmentation, crosses 49 mesh sieves, just obtains reduced ilmenite powder product.The chemical ingredients of product is compared as shown in table 1 with GB GB5688-85 welding electrode with reduced ilmenite powder FTH9.20.(seeing Table 1)
The size-grade distribution of product is compared as shown in table 2 with GB GB5688-85 welding electrode with ilmenite powder FTH9.20.(seeing Table 2)
Product of the present invention meets the requirement that the GB GB5688-85 welding electrode of making chemical coating of welding electrode coating is used reduced ilmenite powder FTH9.20 fully.
Advantage of the present invention is:
(1) can fully utilize titanium, iron resources in the ilmenite concentrate, technical process is short, simple, the easily control of equipment.
(2) employing oxidizing roasting both can have been removed the S in the mineral, had changed the raw ore structure again, made ferriferous oxide become Fe with the ilmenite that titanium dioxide is solid-solubilized in
2O
3TiO
2Form, help the carrying out of reduction process.
(3) reductive agent and ilmenite concentrate interlayer are packed into and are reduced in the fire-resistant can, and its residual reductive agent and product separate easily are clean, and the reduzate carbon content is low.In addition, the interlayer tinning is a reductive agent around the ore, does not directly contact with jar, so can not glue jar.
(4) the two-stage reduction both can obtain bigger reduction rate, can obtain the iron particle thicker than the abrasive grit in the general reducing process again.Iron and TiO
2Be monomer separation, mechanically mixing, abrasive grit is spherical in shape, is suitable for doing very much chemical coating of welding electrode coating.
(5) impurities element such as Ca in the ilmenite, Mg, the oxide compound of Al etc. need not removed, and these oxide compounds there is no harm to doing chemical coating of welding electrode coating, because usually add some mineral in the chemical coating of welding electrode formulation for coating material, (mainly contain TiO as rutile
2); Granite, feldspar (all mainly contain SiO
2And Al
2O
3, white clay, mica, talcum, kaolin (all mainly contain Al
2O
3And SiO
2), asbestos (mainly contain SiO
2, MgO, Al
2O
3And CaO) etc.So, the product that reduzate of the present invention can directly be used as chemical coating of welding electrode coating.
Technical process of the present invention such as accompanying drawing.
Embodiments of the invention adopt two kinds of technologies to carry out as a comparison respectively.It is raw material that two embodiment all adopt the milltailings ilmenite concentrate (belonging to granular ilmenite powder) of Flos Bombacis Malabarici vanadium titano-magnetite, and its ore compact structure contains TiO
247～50%, FeO/Fe
2O
3Ratio 〉=5.The chemical ingredients of ilmenite concentrate raw material is as shown in table 3.Make reductive agent with coke breeze, its chemical ingredients and granularity are as shown in table 4.(seeing Table 3,4)
Embodiment 1:
Ilmenite powder claims 100 unit weights, reductive agent claims 25 unit weights, make fire-resistant can with alumina crucible, charging (is tank skin and central part packing reductive agent between the employing annular layer, adorn ilmenite powder between the two-layer reductive agent), simulation tunnel kiln reduction process is carried out the two-stage reduction: be incubated 4 hours down at 1140 ± 5 ℃, be warmed up to 1240 ℃ of insulations 30 minutes then, outage subsequently, furnace cooling to 750 ℃ is come out of the stove, and the sealing air cooling is to room temperature, tank switching, surface blowing cleaning is with crossing 40 eye mesh screens after the fragmentation of Universal ball grinding machine.The chemical ingredients of the reduced ilmenite powder product that is obtained is as shown in table 5, and its size-grade distribution is as shown in table 6.(seeing Table 5,6)
Embodiment 2:
Ilmenite powder claims 100 unit weights, and reductive agent claims 25 unit weights.With ilmenite powder in cabinet-type electric furnace with 860 ± 5 ℃ of oxidizing roastings 90 minutes under still air, packing into the charging method identical with embodiment 1 then, fire-resistant can carries out two-stage reduction, tank switching, surface-conditioning, fragmentation, (technology and various parameter and embodiment 1 are just the same) sieves.The chemical ingredients that adopts embodiment 2 initial oxidation roastings to carry out the reduced ilmenite powder that two-stage reductive technology obtained again sees Table 7, and its size-grade distribution sees Table 8.(seeing Table 7,8)
Abrasive grit electron probe microanalysis in the product, iron level are 97.333%.The contrast of chemical ingredients and size-grade distribution by two embodiment obtained products, can obviously find out, carry out two-stage reductive technology again after adopting embodiment 2 initial oxidation roastings, every index of its reduced ilmenite powder product all meets the GB GB5688-85 welding electrode reduced ilmenite powder FTH9.20 standard-required of chemical coating of welding electrode coating.And embodiment 1 with embodiment 2 identical reducing process conditions under, because do not carry out this process of oxidizing roasting, its sweetening effectiveness is very poor, the ferrous content height, the metallic iron reduction ratio is low, and the chemical ingredients of product and granularity all do not meet GB5688-85 welding electrode reduced ilmenite powder FTH9.20 standard.
The chemical ingredients of table 1 product (wt%) compares with GB
Composition TiO
2C FeO S P
Kind
Product of the present invention＞52＜0.2＜9.0＜0.03＜0.01
GB＞52＜0.2＜9.0＜0.035＜0.040
The size-grade distribution of table 2 product and GB are relatively
The kind size-grade distribution, %
+ 40 orders-40 order+150 orders-150 order+200 orders-200 order
（＞425μm） （425～106μm） （106～75μm） （＜75μm）
Product of the present invention＜1 surplus＜20＜10
GB＜1 surplus≤25≤15
The chemical ingredients of table 3 ilmenite concentrate (wt%)
TiO MgO Al
2O
3CaO FeO Fe
2O
3S P
47.68 6.00 1.40 1.20 34.22 5.72 0.12 0.01
The chemical ingredients (wt%) of table 4 reductive agent coke breeze and granularity (mm)
Fixed carbon volatile matter ash content moisture granularity
72.61 23.43 3.96 0.83 0～5
The chemical ingredients (wt%) of table 5 embodiment 1 product
TiO
2FeO C S P
49.09 34.99 0.057 0.085 0.0069
The size-grade distribution of table 6 embodiment 1 product, %
+ 40 orders-40 order+150 orders-150 order+200 orders-200 order
（＞425μm） （425～106μm） （106～75μm） （＜75μm）
- 55.59 37.75 6.65
The chemical ingredients (wt%) of table 7 embodiment 2 products
TiO
2FeO M.Fe C S P
52.40 8.62 26.3 0.17 0.026 ＜0.01
The size-grade distribution of table 8 embodiment 2 products, %
+ 40 orders-40 order+150 orders-150 order+200 orders-200 order
（425μm） （425～106μm） （106～75μm） （＜75μm）
- 80.64 10.52 8.84
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88103956 CN1022579C (en) | 1988-06-24 | 1988-06-24 | Preparation method of reduced ilmenite powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88103956 CN1022579C (en) | 1988-06-24 | 1988-06-24 | Preparation method of reduced ilmenite powder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1036228A CN1036228A (en) | 1989-10-11 |
| CN1022579C true CN1022579C (en) | 1993-10-27 |
Family
ID=4832827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88103956 Expired - Fee Related CN1022579C (en) | 1988-06-24 | 1988-06-24 | Preparation method of reduced ilmenite powder |
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| Country | Link |
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| CN (1) | CN1022579C (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1085737C (en) * | 1999-08-10 | 2002-05-29 | 中南工业大学 | Process for preparing Ti-enriched material from ilmenite concentrate |
| DE102008064648A1 (en) * | 2008-01-23 | 2010-05-20 | Tradium Gmbh | Reaction vessel for the production of metal powders |
| DE102009060821A1 (en) * | 2009-12-28 | 2011-06-30 | crenox GmbH, 47829 | Process for the utilization of titanium-containing by-products |
| CN103937960B (en) * | 2014-04-08 | 2016-04-20 | 东北大学 | A kind of stage of reduction method of boron-containing iron concentrate |
| EP3106531A1 (en) * | 2015-06-15 | 2016-12-21 | Improbed AB | Use of pre-oxidized ilmenite in fluidized bed boilers |
| CN106399666A (en) * | 2016-11-22 | 2017-02-15 | 江苏省冶金设计院有限公司 | System and method for treating titanium concentrate by combining rotary hearth furnace and electric furnace |
| CN106367586A (en) * | 2016-11-22 | 2017-02-01 | 江苏省冶金设计院有限公司 | System and method for treating titanium concentrate |
| CN106801181B (en) * | 2016-12-10 | 2019-01-29 | 包钢集团矿山研究院（有限责任公司） | A kind of method that ferro-titanium is smelted in carbon thermal reduction |
| CN107760870A (en) * | 2017-10-18 | 2018-03-06 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of preparation method of welding reduced ilmenite |
| CN112410539B (en) * | 2020-10-30 | 2022-07-08 | 河南佰利联新材料有限公司 | Method for sorting titanium middlings containing weak magnetic gangue minerals |
-
1988
- 1988-06-24 CN CN 88103956 patent/CN1022579C/en not_active Expired - Fee Related
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|---|---|
| CN1036228A (en) | 1989-10-11 |
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