CN103962225B - The method of utilize that alkali soaks, v-ti magnetite concentrate being selected in classification and gravity treatment again - Google Patents
The method of utilize that alkali soaks, v-ti magnetite concentrate being selected in classification and gravity treatment again Download PDFInfo
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Abstract
The method that the present invention discloses and a kind ofly utilizes that alkali soaks, v-ti magnetite concentrate is selected in classification and gravity treatment again, comprise the steps: that it is 5%～52% aqueous slkali that v-ti magnetite concentrate is placed in to mass concentration, at 260 DEG C～370 DEG C, alkali soaks reaction 0.5～5 hour, filters, and obtains filtrate and alkali leaching cake A; A is added water, feed cyclone and carry out classification, classification goes out sand setting B and overflow C, then the B ore pulp of making mass concentration 35～40% that adds water is carried out to gravity treatment, and obtaining respectively TFe content is 63～68% iron ore concentrates and TiO2Content is 50～60% ilmenite concentrates. Advantage of the present invention is: realized v-ti magnetite concentrate is efficiently sorted, alkaline consumption is low, reduces and enters impurity content, especially the objectionable impurities TiO such as blast furnace Al and Si2, S content, improve the capacity factor of a blast furnace, reduce the discharge capacity of blast furnace slag, reduced ironmaking cost, solved smelting process S content high, with serious pollution problem; Improve titanium resource comprehensive utilization ratio simultaneously.
Description
Technical field
The present invention relates to a kind of ore-dressing technique of v-ti magnetite concentrate, relate in particular to that one utilizes that alkali soaks, classification and heavyThe method of v-ti magnetite concentrate is selected in choosing again.
Background technology
Vanadium titano-magnetite is a kind of grandidierite of multiple metallic element, is the magnetic taking iron content, vanadium, titanium as main symbiosisIron ore. And v-ti magnetite concentrate is one of product of vanadium titano-magnetite process ore dressing acquisition, wherein vanadium is same with class matterResemble tax and be stored in titanomagnetite, displacement high price iron ion. Titanomagnetite is oikocryst mineral (Fe3O4) and chadacryst ore deposit [titaniumIron spar 2FeOTiO2, ilmenite FeOTiO2, aluminum-spinel (Mg, Fe) (Al, Fe)2O4] formComplex. For example, Chinese Panzhihua Region Midi Concentrator v-ti magnetite green ore and select the v-ti magnetite after ironConcentrate chemistry multielement analysis the results are shown in Table 1, v-ti magnetite green ore and vanadium titano-magnetite concentrate material phase analysis resultRespectively in table 2 and table 3.
The Chinese Panzhihua Region of table 1 Midi Concentrator raw ore and v-ti magnetite concentrate chemistry multielement analysis result
| Element | TFe | FeO | mFe | S | Fe2O3 | TiO2 | V2O5 |
| Raw ore | 29.53 | 21.36 | 20.20 | 0.631 | 17.70 | 10.54 | 0.278 |
| Concentrate | 54.01 | 32.42 | 51.16 | 0.574 | 40.97 | 12.67 | 0.61 |
| Element | SiO2 | Al2O3 | CaO | MgO | Co | P | As |
| Raw ore | 22.80 | 7.65 | 6.36 | 7.23 | 0.02 | 0.015 | <0.01 |
| Concentrate | 3.21 | 3.30 | 0.98 | 2.90 | 0.02 | 0.008 | <0.010 |
The Chinese Panzhihua Region of table 2 Midi Concentrator v-ti magnetite green ore titanium, iron chemical phase analysis result
The Chinese Panzhihua Region of table 3 Midi Concentrator vanadium titano-magnetite concentrate titanium, iron chemical phase analysis result
Vanadium titano-magnetite aboundresources in the world, whole world reserves reach more than 40,000,000,000 tons, and reserves in China reaches 98.3Hundred million tons. In v-ti magnetite ore, iron is mainly composed and is stored in titanomagnetite, the TiO in ore2Main tax is stored in granularIn ilmenite and titanomagnetite. Generally, approximately 57% titanium is composed and is stored in titanomagnetite (mFeTiO3·nFe3O4) in, approximately 40% titanium is composed and is stored in ilmenite (FeTiO3) in, because vanadium titano-magnetite ore composition is complicated,Character is special, thereby the comprehensive utilization of this class ore is the international a great problem always thoroughly not solving. Vanadium titanium magneticThis occurrence characteristics of iron ore mineral has determined to adopt physical upgrading method to realize titanium, iron from the source of oreEffective separation, cause v-ti magnetite ore after physical upgrading, iron concentrate grade low (TFe < 55%), iron essenceTitanium in ore deposit enters blast furnace slag (TiO completely at ironmaking processes2Content reaches more than 22%) formation vitreum, TiO2Lost actively and cannot economic recovery, meanwhile, titanium recovery rate is low only has 18%. Therefore, use the ore dressing of physicsMethod sorts titanium iron ore and greatly reduces titanium and the iron value of utilization separately.
China be in the world first with commercial scale comprehensive iron, vanadium, titanium of extracting from complicated vanadium titano-magnetiteCountry, but characteristic is deposited in the tax that can not fundamentally change the fine and close symbiosis of iron, titanium due to general physical method, because ofThis, adopt the physical upgrading methods such as common gravity separation method, magnetic method, floatation to carry out titanium, iron separation, efficiencyLow, be difficult to select ilmenite concentrate of high grade and that impurity is few or iron ore concentrate; Meanwhile, TiO2Organic efficiency is not high, vanadiumTitanomagnetite raw ore after Mineral separation, approximately 54% TiO2Enter iron ore concentrate, these TiO2Through blast furnace processAfter almost all enter slag phase, form TiO2The blast furnace slag of content 20～24%; In addition, due in iron ore concentrateThe impurity contents such as S, Si, Al are also too high, above-mentioned reason not only causes that steelmaking furnace usage factor is low, energy consumption is large,Titanium resource waste, and amount of slag is large, environmental pollution is serious.
CN2011100879566 discloses " a kind of beneficiation method of ilmenite ", is by v-ti magnetite green ore warpOre grinding, alkali soak pretreatment, filtration, magnetic separation obtains the method for ilmenite concentrate and iron ore concentrate after ore grinding again. The method willIron content 32.16% and containing TiO212.11% v-ti magnetite green ore soaks pretreatment, filtration, again by ore grinding, alkaliMagnetic separation processing after ore grinding, has formed iron content 59.30% iron ore concentrate and has contained TiO220.15% ilmenite concentrate. Due to the partyMethod is for ilmenite raw ore, raw ore SiO2、Al2O3, the gangue mineral content such as CaO, MgO is high, alkaliThe process of soaking will preferentially occur in SiO2、Al2O3With it mineral, alkali soaks and in process, has formed the alkali similar to titaniumSoak rear compound, the NaOH alkali number that alkali soaks the consumption of ferrotianium raw ore is 469Kg/t raw ore, and cost is high; And ferrotianiumRaw ore alkali soaks the titanium compound of rear formation, soaks the compound of the silicon of rear formation with gangue mineral alkali such as quartz, wantsIt is very difficult in follow-up magnetic separation, realizing effectively separation, and this has also restricted ferrotianium raw ore alkali and has soaked rear iron ore concentrateThe raising of grade and ilmenite concentrate grade. Meanwhile, the method adopts twice grinding process to change mineral surfaces physicsLearn character, increased complexity and the process cost of the method. In a word, by this kind of procedure complexity, andAnd in processing procedure, quantity of alkali consumption is large, cost is high; Meanwhile, cannot obtain more high-grade iron ore concentrate and ilmenite concentrate.
CN201310183580.8 discloses " a kind of wet-treating sefstromite concentrate is prepared the method for titanium liquid ", proposesBy the method for salt pickling separating titanium iron. This invention is the method that wet-treating v-ti magnetite concentrate is prepared titanium liquid,Comprise that v-ti magnetite concentrate hydrochloric acid leaching, molten salt react ion, pickling again, sulfuric acid solution, filtration etc. obtain titanium liquid etc.Process, the method is mainly that its complex technical process, needs to use salt in hydrochloric acid leaching process for extracting ilmenite concentrateAcid is reacted and is dissolved in filtrate with iron and vanadium, consumes a large amount of hydrochloric acid, and cost is high; Meanwhile, in fused salt process, use NaOHConsume alkali with titanium and pasc reaction. In addition, owing to having used hydrochloric acid in the method leaching process, chlorion in hydrochloric acidLarge to equipment corrosion, be difficult for suitability for industrialized production. The method is mainly applicable to the low poor vanadium titanium magnetic of high vanadium low iron contentThe recycling of titanium in iron ore concentrate.
Summary of the invention
In order to overcome the deficiency of above-mentioned beneficiation method, technical problem to be solved by this invention is at physics and chemistryOn the basis of the effective combination of beneficiation method, provide a kind of cost low, reclaim quality and efficiency is high, technique is simple,And good operability utilize that alkali soaks, method that v-ti magnetite concentrate is selected in classification, gravity treatment again, realized vanadium titanium magneticIn iron ore concentrate, titanium, iron efficiently separate, and have improved and have entered stokehold iron grade, reduce and enter blast furnace TiO2、S、Si、The content of the impurity such as Al, improves the capacity factor of a blast furnace, reduces the discharge capacity of blast furnace slag, has reduced ironmaking cost,Improve TiO simultaneously2Comprehensive utilization of resources rate, reduces environmental pollution.
In order to realize object of the present invention, technical scheme of the present invention is achieved in that
The method of of the present inventionly a kind ofly utilize that alkali soaks, v-ti magnetite concentrate being selected in classification and gravity treatment again, is characterized in thatComprise the steps:
1) alkali soaks
Be 50%～55%, TiO by TFe content range2Content range is 10%～15%, SiO2Content is3％～6％、Al2O3Content is 3%～6%, S content > 0.5% v-ti magnetite concentrate, be placed in mass concentration and beIn 5%～52% aqueous slkali, at the temperature of 260 DEG C～370 DEG C, alkali soaks reaction 0.5～5 hour, by reactantFilter, obtain filtrate and alkali leaching cake A, described filtrate feeds recovery and processing system;
2) classification
By step 1) in alkali leaching cake A add water, form the ore pulp of mass concentration 20%～25% and feed cyclone and enterRow classification, classification goes out sand setting B and overflow C;
3) gravity treatment
By step 2) in the sand setting B ore pulp of making mass concentration 35%～40% that adds water carry out gravity treatment, respectivelyTo gravity concentrate D and gravity tailings E, described gravity concentrate D is that TFe content range is 63%～68%Final iron ore concentrate, described gravity tailings E and the overflow C of cyclone merge into TiO2Content is 50%～60%Final ilmenite concentrate.
Described aqueous slkali be in NaOH or the KOH aqueous solution, NaOH and KOH mixed aqueous solution arbitrarilyA kind of.
Described gravity treatment adopts the spiral chute of 1.2 meters of φ 0.6～φ to carry out gravity treatment.
Advantage of the present invention is:
Method synthesis of the present invention uses that alkali soaks, the method for classification and gravity treatment is processed v-ti magnetite concentrate, has realizedIn v-ti magnetite concentrate, titanium, iron efficiently separate; In isolated iron ore concentrate, S content significantly reduces simultaneously, by 0.50%More than be down to and be less than 0.10%, SiO2Content is down to below 3% by 3%～6%, Al2O3Content is by 3%～6%Be down to below 3%, for subsequent smelting has been created better condition.
The process that alkali soaks has been carried out chemical reaction to elements such as Ti, S, Si, Al in v-ti magnetite concentrate, has formedCorresponding salt. Different from v-ti magnetite concentrate, SiO in ilmenite raw ore2Content (> 20%) and Al2O3Content (> 7%) far away higher than SiO in v-ti magnetite concentrate2Content (< 6%) and Al2O3Content (< 6%),Soak in ilmenite raw ore process at alkali, the process of soaking due to alkali will preferentially occur in SiO2、Al2O3On mineral,Make alkali soak v-ti magnetite concentrate and soak ferrotianium raw ore alkali consumption still less than alkali, better effects if. For example, use NaOHWhen alkali soaks, the alkali number that the present invention consumes is less than 100kg/t concentrate, and the alkali number 469kg/t that soaks raw ore consumption than alkali is formerOre deposit has reduced more than 4.6 times.
Cyclone is pressed granularity and the gravity grading of mineral, and alkali soaks the titanium compound of rear generation than the fine size of iron mineral,Proportion is little, the difference of specific gravity of titanium, iron is larger, has realized effective separation of titanium, iron.
Add gravity treatment, make iron concentrate grade bring up to 63%～68% by 50%～55%, in iron ore concentrate, contain simultaneouslyS amount is less than 0.1%, SiO2And Al2O3Content is all less than 3%, TiO2Content is down to below 6% by 12.91%;Meanwhile, can also obtain TiO2Content is 50%～60% ilmenite concentrate. Adopt the method, realized to titanium,Iron effectively separates, and reduces and enters blast furnace TiO2, the impurity such as S, Si, Al content, improve blast furnace utilization systemNumber, the discharge capacity of minimizing blast furnace slag, has reduced ironmaking cost, improves titanium resource comprehensive utilization ratio simultaneously.
Brief description of the drawings
Fig. 1 is process chart of the present invention.
Fig. 2 is the process chart of an alternative embodiment of the invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further:
Embodiment 1:
As shown in Figure 1.
1) alkali soaks
Be 50.9%, TiO by TFe content2Content is 15.0%, SiO2Content is 3.60%, Al2O3ContentBe 4.22%, the v-ti magnetite concentrate of S content 0.61%, be placed in mass concentration and be 30% NaOH aqueous slkali,At the temperature of 260 DEG C, alkali soaks reaction 2 hours, and reactant is filtered, and obtains filtrate and alkali leaching cake A,NaOH consumption 78kg/t is to ore deposit, and described filtrate feeds recovery and processing system, and its chemical equation is:
2) classification
By step 1) in alkali leaching cake A add water, form the ore pulp of mass concentration 20% and feed cyclone and carry out classification,Classification goes out sand setting B and overflow C.
3) gravity treatment
By step 2) in the add water ore pulp of making mass concentration 40% of sand setting B feed the spiral chute of 1.2 meters of φCarry out gravity treatment, respectively gravity concentrate D, gravity tailings E, gravity concentrate D is that TFe content is 63.7%Final iron ore concentrate (SiO2Content is 0.86%, Al2O3Content is 1.65%, S content is 0.02%), describedThe overflow C of gravity tailings E and cyclone merges into TiO2Content is 51.5% final ilmenite concentrate.
Embodiment 2:
As shown in Figure 1.
1) alkali soaks
Be 51.2%, TiO by TFe content2Content is 14.3%, SiO2Content is 3.15%, Al2O3ContentBe 4.21%, the v-ti magnetite concentrate of S content 0.61%, be placed in mass concentration and be 10% NaOH aqueous slkali,At the temperature of 330 DEG C, alkali soaks reaction 3 hours, and reactant is filtered, and obtains filtrate and alkali leaching cake A,NaOH consumption 80kg/t is to ore deposit, and described filtrate feeds recovery and processing system, the same embodiment of its chemical equation1。
2) classification
By step 1) in alkali leaching cake A add water, form the ore pulp of mass concentration 24% and feed cyclone and carry out classification,Classification goes out sand setting B and overflow C.
3) gravity treatment
By step 2) in the add water ore pulp of making mass concentration 39% of sand setting B feed the spiral chute of 0.9 meter of φCarry out gravity treatment, respectively gravity concentrate D, gravity tailings E, gravity concentrate D is that TFe content is 65.1%Final iron ore concentrate (SiO2Content is 0.70%, Al2O3Content is 1.34%, S content is 0.01%), describedThe overflow C of gravity tailings E and cyclone merges into TiO2Content is 53.6% final ilmenite concentrate.
Embodiment 3:
As shown in Figure 2.
1) alkali soaks
Be 53.7%, TiO by TFe content2Content is 11.2%, SiO2Content is 3.85%, Al2O3ContentBe 4.49%, the v-ti magnetite concentrate of S content 0.60%, be placed in mass concentration and be 40% NaOH aqueous slkali,At the temperature of 370 DEG C, alkali soaks reaction 1 hour, and reactant is filtered, and obtains filtrate and alkali leaching cake A,NaOH consumption 83kg/t is to ore deposit, and described filtrate feeds recovery and processing system, and its chemical equation is with implementingExample 1.
2) classification
By step 1) in alkali leaching cake A add water, form the ore pulp of mass concentration 23% and feed cyclone and carry out classification,Classification goes out sand setting B and overflow C.
3) gravity treatment
By step 2) in the add water ore pulp of making mass concentration 38% of sand setting B feed the spiral chute of 0.9 meter of φCarry out gravity treatment, obtain respectively gravity concentrate D, gravity tailings E and gravity treatment chats F, gravity concentrate D is that TFe containsAmount is 67.8% final iron ore concentrate (SiO2Content is 0.40%, Al2O3Content is 1.25%, S content is0.01%), described gravity tailings E is true tailings, and gravity treatment chats F and overflow C merge into TiO2ContentIt is 59.2% final ilmenite concentrate.
Embodiment 4:
As shown in Figure 2.
1) alkali soaks
Be 52.5%, TiO by TFe content2Content is 12.7%, SiO2Content is 3.95%, Al2O3ContentBe 4.62%, the v-ti magnetite concentrate of S content 0.69%, be placed in mass concentration and be 20% NaOH aqueous slkali,At the temperature of 280 DEG C, alkali soaks reaction 4 hours, and reactant is filtered, and obtains filtrate and alkali leaching cake A,NaOH consumption 80kg/t is to ore deposit, and described filtrate feeds recovery and processing system, the same embodiment of its chemical equation1。
2) classification
By step 1) in alkali leaching cake A add water, form the ore pulp of mass concentration 22% and feed cyclone and carry out classification,Classification goes out sand setting B and overflow C.
3) gravity treatment
By step 2) in the add water ore pulp of making mass concentration 37% of sand setting B feed the spiral chute of 0.6 meter of φCarry out gravity treatment, obtain respectively gravity concentrate D, gravity tailings E and gravity treatment chats F, gravity concentrate D is that TFe containsAmount is 66.3% final iron ore concentrate (SiO2Content is 0.49%, Al2O3Content is 1.31%, S content is0.01%), described gravity tailings E is true tailings, and gravity treatment chats F and overflow C merge into TiO2ContentIt is 56.1% final ilmenite concentrate.
Embodiment 5:
As shown in Figure 1.
1) alkali soaks
Be 54.2%, TiO by TFe content2Content is 10.5%, SiO2Content is 3.95%, Al2O3ContentBe 4.78%, the v-ti magnetite concentrate of S content 0.79%, be placed in mass concentration and be 50% KOH aqueous slkali,At the temperature of 350 DEG C, alkali soaks reaction 5 hours, and reactant is filtered, and obtains filtrate and alkali leaching cake A,KOH consumption 98kg/t is to ore deposit, and described filtrate feeds recovery and processing system, and its chemical equation is:
2) classification
By step 1) in alkali leaching cake A add water, form the ore pulp of mass concentration 21% and feed cyclone and divideLevel, classification goes out sand setting B and overflow C.
3) gravity treatment
By step 2) in the add water ore pulp of making mass concentration 36% of sand setting B feed the spiral chute of 0.9 meter of φCarry out gravity treatment, respectively gravity concentrate D, gravity tailings E, gravity concentrate D is that TFe content is 67.2%Final iron ore concentrate (SiO2Content is 0.67%, Al2O3Content is 1.20%, S content is 0.01%), describedThe overflow C of gravity tailings E and cyclone merges into TiO2Content is 55.2% final ilmenite concentrate.
Embodiment 6:
As shown in Figure 1.
1) alkali soaks
Be 51.9%, TiO by TFe content2Content is 13.9%, SiO2Content is 3.95%, Al2O3ContentBe 4.76%, the v-ti magnetite concentrate of S content 0.75%, be placed in mass concentration and be 49% KOH aqueous slkali,At the temperature of 290 DEG C, alkali soaks reaction 3.5 hours, and reactant is filtered, and obtains filtrate and alkali leaching cake A,KOH consumption 86kg/t is to ore deposit, and described filtrate feeds recovery and processing system, the same embodiment of its chemical equation5。
2) classification
By step 1) in alkali leaching cake A add water, form the ore pulp of mass concentration 20% and feed cyclone and carry out classification,Classification goes out sand setting B and overflow C.
3) gravity treatment
By step 2) in the add water ore pulp of making mass concentration 35% of sand setting B feed the spiral chute of 1.2 meters of φCarry out gravity treatment, respectively gravity concentrate D, gravity tailings E, gravity concentrate D is that TFe content is 64.7%Final iron ore concentrate (SiO2Content is 0.87%, Al2O3Content is 1.72%, S content is 0.02%), describedThe overflow C of gravity tailings E and cyclone merges into TiO2Content is 57.2% final ilmenite concentrate.
Embodiment 7:
As shown in Figure 1.
1) alkali soaks
Be 51.5%, TiO by TFe content2Content is 13.8%, SiO2Content is 3.95%, Al2O3ContentBe 4.80%, the v-ti magnetite concentrate of S content 0.79%, be placed in NaOH mass concentration and be 30%, KOH matterIn the aqueous slkali that amount concentration is 6%, at the temperature of 290 DEG C, alkali soaks reaction 4.0 hours, and reactant was carried outFilter, obtains filtrate and alkali leaching cake A, and NaOH consumption 30kg/t is to ore deposit, and KOH consumption 52kg/t is to ore deposit,KOH consumption 86kg/t is to ore deposit, and described filtrate feeds recovery and processing system, the same embodiment of its chemical equation1 and embodiment 5.
2) classification
By step 1) in alkali leaching cake A add water, form the ore pulp of mass concentration 20% and feed cyclone and carry out classification,Classification goes out sand setting B and overflow C.
3) gravity treatment
By step 2) in the add water ore pulp of making mass concentration 35% of sand setting B feed the spiral chute of 1.2 meters of φCarry out gravity treatment, respectively gravity concentrate D, gravity tailings E, gravity concentrate D is that TFe content is 64.2%Final iron ore concentrate (SiO2Content is 0.77%, Al2O3Content is 1.52%, S content is 0.01%), describedThe overflow C of gravity tailings E and cyclone merges into TiO2Content is 57.5% final ilmenite concentrate.
Claims (2)
1. a method of utilize that alkali soaks, v-ti magnetite concentrate being selected in classification and gravity treatment again, is characterized in that comprisingFollowing steps:
1) alkali soaks
Be 50%～55%, TiO by TFe content range2Content range is 10%～15%, SiO2Content is3％～6％、Al2O3Content is 3%～6%, S content > 0.5% v-ti magnetite concentrate, be placed in mass concentrationBe that in 5%～52% aqueous slkali, described aqueous slkali is NaOH or the KOH aqueous solution, NaOH and KOHAny one in mixed aqueous solution, at the temperature of 260 DEG C～370 DEG C, alkali soaks reaction 0.5～5 hour, willReactant filters, and obtains filtrate and alkali leaching cake A, and described filtrate feeds recovery and processing system;
2) classification
By step 1) in alkali leaching cake A add water, form the ore pulp of mass concentration 20%～25% and feed cycloneCarry out classification, classification goes out sand setting B and overflow C;
3) gravity treatment
By step 2) in the sand setting B ore pulp of making mass concentration 35%～40% that adds water carry out gravity treatment, respectivelyObtain gravity concentrate D and gravity tailings E, described gravity concentrate D is that TFe content range is 63%～68%Final iron ore concentrate, described gravity tailings E and the overflow C of cyclone merge into TiO2Content is 50%～60% final ilmenite concentrate.
2. the method for according to claim 1ly utilize that alkali soaks, v-ti magnetite concentrate being selected in classification and gravity treatment again,It is characterized in that described gravity treatment adopts the spiral chute of 1.2 meters of φ 0.6～φ to carry out gravity treatment.
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| CN102181626A (en) * | 2011-04-08 | 2011-09-14 | 北京矿冶研究总院 | Beneficiation method of ilmenite |
| CN103276211A (en) * | 2013-05-17 | 2013-09-04 | 中国科学院过程工程研究所 | Method for extracting iron and vanadium from vanadium-titanium magnetite concentrates |
| CN103276227A (en) * | 2013-05-17 | 2013-09-04 | 中国科学院过程工程研究所 | Method for extracting vanadium from vanadium-titanium magnetite concentrates |
| CN103276204A (en) * | 2013-05-17 | 2013-09-04 | 中国科学院过程工程研究所 | Method for preparing titanium slag by wet-processing on vanadium-titanium magnetite concentrates |
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| CN102181626A (en) * | 2011-04-08 | 2011-09-14 | 北京矿冶研究总院 | Beneficiation method of ilmenite |
| CN103276211A (en) * | 2013-05-17 | 2013-09-04 | 中国科学院过程工程研究所 | Method for extracting iron and vanadium from vanadium-titanium magnetite concentrates |
| CN103276227A (en) * | 2013-05-17 | 2013-09-04 | 中国科学院过程工程研究所 | Method for extracting vanadium from vanadium-titanium magnetite concentrates |
| CN103276204A (en) * | 2013-05-17 | 2013-09-04 | 中国科学院过程工程研究所 | Method for preparing titanium slag by wet-processing on vanadium-titanium magnetite concentrates |
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