CN103966423A - Method for re-concentrating vanadium-titanium magnetite concentrate through alkaline leaching, acid pickling and re-selection - Google Patents
Method for re-concentrating vanadium-titanium magnetite concentrate through alkaline leaching, acid pickling and re-selection Download PDFInfo
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Abstract
The invention discloses a method for re-concentrating vanadium-titanium magnetite concentrate through alkaline leaching, acid pickling and re-selection. The method comprises the following steps: placing the vanadium-titanium magnetite concentrate in an alkali solution of which the mass concentration is 5-52% to be subjected to alkaline leaching reaction at the temperature of 280-370 DEG C for 0.5-5 hours, and filtering to obtain a filtrate and an alkaline leached filter cake A; preparing the filter cake A into ore pulp by adding water according to the fact that the mass ratio of solid to liquid is 1:(1-10), placing the ore pulp into an H2SO4 solution of which the mass concentration is 1-10% to be subjected to acid pickling at the temperature of 50-90 DEG C for 5-60 minutes, and filtering to obtain a filtrate and an acid picked filter cake B; preparing the acid picked filter cake B into ore pulp of which the mass concentration is 35-40% by adding water to be subjected to re-selection, so as to obtain iron ore concentrate C of which the TFe content is 65-68%, titanium concentrate ET of which the TiO2 content is 55-80%, and final tailings of which the SiO2 content is 57-61%. The method has the advantages that the vanadium-titanium magnetite concentrate can be efficiently sorted, the alkali consumption is low, the content of impurities such as Al, Si, TiO2 and S entering a blast furnace is reduced, the utilization coefficient of the blast furnace is increased, the iron-making cost is reduced, and the comprehensive utilization ratio of a titanium resource is increased at the same time.
Description
Technical field
The present invention relates to a kind of ore-dressing technique of v-ti magnetite concentrate, the method for relating in particular to and a kind ofly utilize that alkali soaks, v-ti magnetite concentrate being selected in pickling and gravity treatment again.
Background technology
Vanadium titano-magnetite is a kind of complex ore of multiple metallic element, is that to take iron content, vanadium, titanium be the magnetite of main symbiosis.And v-ti magnetite concentrate is one of product of vanadium titano-magnetite process ore dressing acquisition, wherein vanadium is composed and is stored in titanomagnetite with isomorph, displacement high price iron ion.Titanomagnetite is oikocryst mineral (Fe
3o
4) and chadacryst ore deposit [ulvite 2FeOTiO
2, ilmenite FeOTiO
2, aluminum-spinel (Mg, Fe) (Al, Fe)
2o
4] complex body that forms.For example, Chinese Panzhihua Region Midi Concentrator v-ti magnetite green ore and select v-ti magnetite concentrate after iron chemistry multielement analysis to the results are shown in Table 1, v-ti magnetite green ore and vanadium titano-magnetite concentrate material phase analysis result are respectively 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 | Fe 2O 3 | TiO 2 | V 2O 5 |
| 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 | SiO 2 | Al 2O 3 | 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 98.3 hundred million tons.In v-ti magnetite ore, iron is mainly composed and is stored in titanomagnetite, the TiO in ore
2main tax is stored in granular ilmenite and titanomagnetite.Generally, approximately 57% titanium is composed and is stored in titanomagnetite (mFeTiO
3nFe
3o
4) in, approximately 40% titanium is composed and is stored in ilmenite (FeTiO
3) in, because vanadium titano-magnetite ore forms complexity, character is special, thereby the comprehensive utilization of this class ore is the international a great problem always thoroughly not solving.This occurrence characteristics of vanadium titano-magnetite mineral has determined to adopt physical concentration method cannot realize from the source of ore effective separation of titanium, iron, cause v-ti magnetite ore after physical concentration, iron concentrate grade low (TFe<55%), the titanium in iron ore concentrate enters blast furnace slag (TiO completely at iron manufacturing process
2content reaches more than 22%) formation vitreum, TiO
2lost actively and cannot economic recovery, meanwhile, titanium recovery rate is low only has 18%.Therefore by the beneficiation method of physics, sort the value that titanium iron ore greatly reduces titanium and the independent utilization of iron.
China is that first comprehensively extracts the country of iron, vanadium, titanium from complicated vanadium titano-magnetite with technical scale in the world, but characteristic is deposited in the tax that can not fundamentally change iron, the fine and close symbiosis of titanium due to general physical method, therefore, adopt the physical concentration methods such as common gravity separation method, magnetic method, flotation process to carry out titanium, iron separation, efficiency is low, is difficult to select ilmenite concentrate of high grade and that impurity is few or iron ore concentrate; Meanwhile, TiO
2organic efficiency is not high, v-ti magnetite green ore after Mineral separation, approximately 54% TiO
2enter iron ore concentrate, these TiO
2after blast-furnace smelting, almost all enter slag phase, form TiO
2the blast furnace slag of content 20～24%; In addition, because the foreign matter contents such as the S in iron ore concentrate, Si, Al are also too high, above-mentioned reason not only causes that steelmaking furnace utilization coefficient 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 ", be by v-ti magnetite green ore through ore grinding, alkali soak pre-treatment, filtration, magnetic separation obtains the method for ilmenite concentrate and iron ore concentrate after ore grinding again.The method is by iron content 32.16% with containing TiO
212.11% v-ti magnetite green ore by ore grinding, alkali soak pre-treatment, filtration, magnetic separation is processed after ore grinding again, has formed iron content 59.30% iron ore concentrate and containing TiO
220.15% ilmenite concentrate.Because the method is for ilmenite raw ore, raw ore SiO
2, Al
2o
3, the gangue mineral content such as CaO, MgO is high, the process that alkali soaks will preferentially occur in SiO
2, Al
2o
3with it mineral, alkali soaks and in process, has formed the alkali similar to titanium and soak rear compound, and the NaOH alkali number that alkali soaks the consumption of ferrotianium raw ore is 469Kg/t raw ore, and cost is high; And ferrotianium raw ore alkali soaks the titanium compound of rear formation, soak the compound of the silicon of rear formation with gangue mineral alkali such as quartz, to want to realize effective separation in follow-up magnetic separation be very difficult, and this has also restricted the raising that ferrotianium raw ore alkali soaks rear iron concentrate grade and ilmenite concentrate grade.Meanwhile, the method adopts twice grinding process to change mineral surface physicochemical property, has increased complexity and the process cost of the method.In a word, by this kind of procedure complexity, and in treating processes, 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 processing sefstromite concentrate is prepared the method for titanium liquid ", has proposed the method with salt pickling separating titanium iron.This invention is prepared the method for titanium liquid for wet processing v-ti magnetite concentrate, comprise that v-ti magnetite concentrate hydrochloric acid leaching, molten salt react ion, pickling again, sulfuric acid solution, filtration etc. obtain the processes such as titanium liquid, the method is mainly for extracting ilmenite concentrate, its complex technical process, in hydrochloric acid leaching process, need to react and dissolve in filtrate with iron and vanadium with hydrochloric acid, consume a large amount of hydrochloric acid, cost is high; Meanwhile, in fused salt process, use NaOH and titanium and pasc reaction to consume alkali.In addition, owing to having used hydrochloric acid in the method leaching process, in hydrochloric acid, chlorion is large to equipment corrosion, is difficult for suitability for industrialized production.The method is mainly applicable to the recycling of titanium in the low poor v-ti magnetite concentrate of high vanadium low iron content.
Summary of the invention
In order to overcome the deficiency of above-mentioned beneficiation method, technical problem to be solved by this invention is on the basis of the effective combination of physics and chemistry 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 pickling, gravity treatment again, realized titanium, iron in v-ti magnetite concentrate have been carried out to high efficiency separation, improved and entered stokehold iron grade, reduced and enter blast furnace TiO
2, the impurity such as S, Si, Al content, improve the capacity factor of a blast furnace, reduce the quantity discharged of blast furnace slag, reduced ironmaking cost, improve TiO simultaneously
2comprehensive 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 pickling and gravity treatment again, is characterized in that comprising the steps:
1) alkali soaks
By TF
econtent range is 50%～55%, TiO
2content range is 10%～15%, SiO
2content is 3%～6%, Al
2o
3content is 3%～6%, the v-ti magnetite concentrate of S content >0.5%, be placed in mass concentration and be 5%～52% alkaline solution, at the temperature of 280 ℃～370 ℃, alkali soaks reaction 0.5～5 hour, reactant is filtered, obtain filtrate and alkali leaching cake A, described filtrate feeds recovery and processing system;
2) pickling
By step 1) in alkali leaching cake A add water and make the ore pulp that solid-liquid mass ratio is 1:1～10, then to be placed in mass concentration be 1%～10% H
2sO
4in solution, under 50～90 ℃ of conditions, pickling is 5～60 minutes, and pickling reactant is filtered, and obtains filtrate and acidleach filter cake B, and described filtrate feeds recovery and processing system;
3) gravity treatment
By step 2) in acidleach filter cake B add water and make the ore pulp of mass concentration 35%～40% and carry out gravity treatment, obtaining respectively TFe content range is 65%～68% iron ore concentrate, TiO
2content range is 55%～80% ilmenite concentrate and SiO
2content is 57～61% true tailings D.
Described alkaline solution is any one in NaOH or the KOH aqueous solution, NaOH and KOH mixed aqueous solution.
Described gravity treatment adopts
the spiral chute of rice carries out gravity treatment.
Advantage of the present invention is:
Method synthesis of the present invention uses that alkali soaks, the method for pickling, gravity treatment is processed v-ti magnetite concentrate, has realized titanium in v-ti magnetite concentrate, iron high efficiency separation; In isolated iron ore concentrate, S content significantly reduces simultaneously, by more than 0.50% being down to and being less than 0.10%, SiO
2content is down to below 3% by 3%～6%, Al
2o
3content is down to below 3% by 3%～6%, 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 formed corresponding salt.Different from v-ti magnetite concentrate, SiO in ilmenite raw ore
2content (>20%) and Al
2o
3content (>7%) is far away higher than SiO in v-ti magnetite concentrate
2content (<6%) and Al
2o
3content (<6%), soaks in ilmenite raw ore process at alkali, and the process of soaking due to alkali will preferentially occur in SiO
2, Al
2o
3on mineral, make alkali soak v-ti magnetite concentrate and than alkali, soak ferrotianium raw ore alkali consumption still less, better effects if.For example, while soaking with NaOH alkali, the alkali number that the present invention consumes is less than 100kg/t concentrate, and the alkali number 469kg/t raw ore that soaks raw ore consumption than alkali has reduced more than 4.6 times.
Acid cleaning process has dissolved oxysalt and the sulfide such as Ti, Si after alkali soaks, Al effectively, makes it to dissociate with iron ore concentrate.Because the present invention adopts sulfuric acid, carry out pickling in addition, reaction conditions is gentle, and little to equipment corrosion, cost is low, is more conducive to suitability for industrialized production.
Add gravity treatment, make iron concentrate grade bring up to 65%～68% by 50%～55%, in iron ore concentrate, containing S amount, be less than 0.1%, SiO simultaneously
2and Al
2o
3content is all less than 3%, TiO
2content is down to below 6% by 12.91%; Meanwhile, can also obtain TiO
2content is 55%～80% ilmenite concentrate.Adopt the method to realize titanium, iron are carried out to effective separation, reduce and enter blast furnace TiO
2, the impurity such as S, Si, Al content, improve the capacity factor of a blast furnace, reduce the quantity discharged of blast furnace slag, reduced ironmaking cost, improve titanium resource comprehensive utilization ratio simultaneously.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
Fig. 2 is that the present invention adopts two sections of gravity separation technology schemas.
Embodiment
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
By TFe content, be 50.5%, TiO
2content is 14.8%, SiO
2content is 3.65%, Al
2o
3content is 4.41%, the v-ti magnetite concentrate of S content 0.56%, be placed in mass concentration and be 30% NaOH alkaline solution, at the temperature of 300 ℃, alkali soaks reaction 4.5 hours, reactant is filtered, obtain filtrate and alkali leaching cake A, NaOH consumption 81kg/t is to ore deposit, and described filtrate feeds recovery and processing system, and its chemical equation is:
2) pickling
By step 1) in alkali leaching cake A add water and make the ore pulp that quality solid-to-liquid ratio is 1:9, then to be placed in mass concentration be 5% H
2sO
4in, 70 ℃ of pickling 58 minutes, filter pickling reactant, obtain filtrate and acidleach filter cake B, and described filtrate feeds recovery and processing system, and its chemical equation is:
3) gravity treatment
By step 2) in acidleach filter cake B add water and make the ore pulp of mass concentration 41% and feed
the spiral chute of rice carries out gravity treatment, obtains respectively gravity concentrate C, gravity tailings D and gravity treatment chats E, and gravity concentrate C is that TFe content is 65.7% final iron ore concentrate (SiO
2content is 0.56%, Al
2o
3content is 1.45%, S content is 0.02%), described gravity tailings D is SiO
2content is 60.2% true tailings, and gravity treatment chats E is TiO
2content is 60.8% final ilmenite concentrate.
Embodiment 2:
1) alkali soaks
By TFe content, be 54.5%, TiO
2content is 10.3%, SiO
2content is 3.55%, Al
2o
3content is 5.43%, the v-ti magnetite concentrate of S content 0.66%, be placed in mass concentration and be 20% NaOH alkaline solution, at the temperature of 350 ℃, alkali soaks reaction 2 hours, reactant is filtered, obtain 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 with embodiment 1.
2) pickling
By step 1) in alkali leaching cake A add water and make the ore pulp that quality solid-to-liquid ratio is 1:7, then to be placed in mass concentration be 7% H
2sO
4in, 50 ℃ of pickling 20 minutes, filter pickling reactant, obtain filtrate and acidleach filter cake B, and described filtrate feeds recovery and processing system, and its chemical equation is with embodiment 1.
3) gravity treatment
By step 2) in acidleach filter cake B add water and make the ore pulp of mass concentration 36% and feed
the spiral chute of rice carries out gravity treatment, obtains respectively gravity concentrate C, gravity tailings D and gravity treatment chats E, and gravity concentrate C is that TFe content is 66.5% final iron ore concentrate (SiO
2content is 0.40%, Al
2o
3content is 1.85%, S content is 0.01%), described gravity tailings D is SiO
2content is 58.5% true tailings, and gravity treatment chats E is TiO
2content is 76.0% final ilmenite concentrate.
Embodiment 3:
1) alkali soaks
By TFe content, be 53.0%, TiO
2content is 12.5%, SiO
2content is 3.75%, Al
2o
3content is 5.50%, the v-ti magnetite concentrate of S content 0.86%, be placed in mass concentration and be 15% NaOH alkaline solution, at the temperature of 310 ℃, alkali soaks reaction 2.5 hours, reactant is filtered, obtain filtrate and alkali leaching cake A, NaOH consumption 75kg/t is to ore deposit, and described filtrate feeds recovery and processing system, and its chemical equation is with embodiment 1.
2) pickling
By step 1) in alkali leaching cake A add water and make the ore pulp that quality solid-to-liquid ratio is 1:5, then to be placed in mass concentration be 6% H
2sO
4in, 60 ℃ of pickling 8 minutes, filter pickling reactant, obtain filtrate and acidleach filter cake B, and described filtrate feeds recovery and processing system, and its chemical equation is with embodiment 1.
3) gravity treatment
By step 2) in acidleach filter cake B add water and make the ore pulp of mass concentration 40% and feed
the spiral chute of rice carries out gravity treatment, obtains respectively gravity concentrate C, gravity tailings D and gravity treatment chats E, and gravity concentrate C is that TFe content is 65.9% final iron ore concentrate (SiO
2content is 0.45%, Al
2o
3content is 1.99%, S content is 0.02%), described gravity tailings D is SiO
2content is 59.0% true tailings, and gravity treatment chats E is TiO
2content is 72.3% final ilmenite concentrate.
Embodiment 4:
1) alkali soaks
By TFe content, be 52.0%, TiO
2content is 13.5%, SiO
2content is 3.90%, Al
2o
3content is 5.60%, the v-ti magnetite concentrate of S content 0.59%, be placed in mass concentration and be 9% NaOH alkaline solution, at the temperature of 370 ℃, alkali soaks reaction 35 minutes, reactant is filtered, obtain filtrate and alkali leaching cake A, NaOH consumption 80kg/t is to ore deposit, and described filtrate feeds recovery and processing system, and its chemical equation is with embodiment 1.
2) pickling
By step 1) in alkali leaching cake A add water and make the ore pulp that quality solid-to-liquid ratio is 1:1.5, then to be placed in mass concentration be 3% H
2sO
4in, 65 ℃ of pickling 35 minutes, filter pickling reactant, obtain filtrate and acidleach filter cake B, and described filtrate feeds recovery and processing system, and its chemical equation is with embodiment 1.
3) gravity treatment
By step 2) in acidleach filter cake B add water and make the ore pulp of mass concentration 40% and feed
the spiral chute of rice carries out gravity treatment, obtains respectively gravity concentrate C, gravity tailings D and gravity treatment chats E, and gravity concentrate C is that TFe content is 67.9% final iron ore concentrate (SiO
2content is 0.31%, Al
2o
3content is 1.10%, S content is 0.01%), described gravity tailings D is SiO
2content is 58.5% true tailings, and gravity treatment chats E is TiO
2content is 79.6% final ilmenite concentrate.
Embodiment 5:
As shown in Figure 2.
1) alkali soaks
By TF
econtent is 52.5%, TiO
2content is 12.8%, SiO
2content is 3.85%, Al
2o
3content is 4.60%, the v-ti magnetite concentrate of S content 0.50%, be placed in mass concentration and be 38% KOH alkaline solution, at the temperature of 280 ℃, alkali soaks reaction 4.0 hours, reactant is filtered, obtain filtrate and alkali leaching cake A, KOH consumption 95kg/t is to ore deposit, and described filtrate feeds recovery and processing system, and its chemical equation is:
2) pickling
By step 1) in alkali leaching cake A add water and make the ore pulp that quality solid-to-liquid ratio is 1:3.5, then to be placed in mass concentration be 9% H
2sO
4in, 60 ℃ of pickling 20 minutes, filter pickling reactant, obtain filtrate and acidleach filter cake B, and described filtrate feeds recovery and processing system, and its chemical equation is:
3) gravity treatment
By step 2) in acidleach filter cake B add water and make the ore pulp of mass concentration 36% and feed
one section of spiral chute of rice is roughly selected, and must roughly select respectively concentrate C1, rougher tailings D1 and roughly select chats E, by roughly selecting concentrate C1, adds water and makes the ore pulp of mass concentration 41% and feed
rice two sections of spiral chutes carry out selected, respectively selected concentrate C2 and cleaner tailings D2, cleaner tailings D2 returns to one section of spiral chute, selected concentrate C2 is that TFe content is 65.9% final iron ore concentrate (SiO
2content is 0.43%, Al
2o
3content is 1.65%, S content is 0.02%), described rougher tailings D1 is SiO
2content is 59.5% true tailings, and roughly selecting chats E is TiO
2content is 71.0% final ilmenite concentrate.
Embodiment 6:
1) alkali soaks
By TFe content, be 53.5%, TiO
2content is 11.8%, SiO
2content is 3.90%, Al
2o
3content is 4.70%, the v-ti magnetite concentrate of S content 0.55%, be placed in mass concentration and be 49% KOH alkaline solution, at the temperature of 290 ℃, alkali soaks reaction 3.5 hours, reactant is filtered, obtain 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 with embodiment 5.
2) pickling
By step 1) in alkali leaching cake A add water and make the ore pulp that quality solid-to-liquid ratio is 1:2, then to be placed in mass concentration be 1% H
2sO
4in, 90 ℃ of pickling 50 minutes, filter pickling reactant, obtain filtrate and acidleach filter cake B, and described filtrate feeds recovery and processing system, and its chemical equation is with embodiment 5.
3) gravity treatment
By step 2) in acidleach filter cake B add water and make the ore pulp of mass concentration 37% and feed
one section of spiral chute of rice is roughly selected, and must roughly select respectively concentrate C1, rougher tailings D1 and roughly select chats E, by roughly selecting concentrate C1, adds water and makes the ore pulp of mass concentration 40% and feed
rice two sections of spiral chutes carry out selected, respectively selected concentrate C2 and cleaner tailings D2, cleaner tailings D2 returns to one section of spiral chute, selected concentrate C2 is that TFe content is 66.5% final iron ore concentrate (SiO
2content is 0.53%, Al
2o
3content is 1.86%, S content is 0.01%), described rougher tailings D1 is SiO
2content is 57.5% true tailings, and roughly selecting chats E is TiO
2content is 73.2% final ilmenite concentrate.
Embodiment 7:
1) alkali soaks
By TFe content, be 52.8%, TiO
2content is 11.5%, SiO
2content is 3.96%, Al
2o
3content is 4.74%, the v-ti magnetite concentrate of S content 0.57%, the alkaline solution that be placed in NaOH mass concentration and be 20%, KOH mass concentration is 5%, at the temperature of 300 ℃, alkali soaks reaction 1.5 hours, reactant is filtered, obtain filtrate and alkali leaching cake A, NaOH consumption 60kg/t is to ore deposit, and KOH consumption 20kg/t is to ore deposit, described filtrate feeds recovery and processing system, and its chemical equation is with embodiment 1 and embodiment 5.
2) pickling
By step 1) in alkali leaching cake A add water and make the ore pulp that quality solid-to-liquid ratio is 1:2, then to be placed in mass concentration be 2% H
2sO
4in, 80 ℃ of pickling 40 minutes, filter pickling reactant, obtain filtrate and acidleach filter cake B, and described filtrate feeds recovery and processing system, and its chemical equation is with embodiment 1 and embodiment 5.
3) gravity treatment
By step 2) in acidleach filter cake B add water and make the ore pulp of mass concentration 37% and feed
one section of spiral chute of rice is roughly selected, and must roughly select respectively concentrate C1, rougher tailings D1 and roughly select chats E, by roughly selecting concentrate C1, adds water and makes the ore pulp of mass concentration 40% and feed
rice two sections of spiral chutes carry out selected, respectively selected concentrate C2 and cleaner tailings D2, cleaner tailings D2 returns to one section of spiral chute, selected concentrate C2 is that TFe content is 67.8% final iron ore concentrate (SiO
2content is 0.30%, Al
2o
3content is 1.26%, S content is 0.01%), described rougher tailings D1 is SiO
2content is 57.5% true tailings, and roughly selecting chats E is TiO
2content is 73.2% final ilmenite concentrate.
Claims (3)
1. a method of utilize that alkali soaks, v-ti magnetite concentrate being selected in pickling and gravity treatment again, is characterized in that comprising the steps:
1) alkali soaks
By TFe content range, be 50%～55%, TiO
2content range is 10%～15%, SiO
2content is 3%～6%, Al
2o
3content is 3%～6%, the v-ti magnetite concentrate of S content >0.5%, be placed in mass concentration and be 5%～52% alkaline solution, at the temperature of 280 ℃～370 ℃, alkali soaks reaction 0.5～5 hour, reactant is filtered, obtain filtrate and alkali leaching cake A, described filtrate feeds recovery and processing system;
2) pickling
By step 1) in alkali leaching cake A add water to make solid-liquid mass ratio be 1: 1～10 ore pulp, then to be placed in mass concentration be 1%～10% H
2sO
4in solution, under 50 ℃～90 ℃ conditions, pickling is 5～60 minutes, and pickling reactant is filtered, and obtains filtrate and acidleach filter cake B, and described filtrate feeds recovery and processing system;
3) gravity treatment
By step 2) in acidleach filter cake B add water and make the ore pulp of mass concentration 35%～40% and carry out gravity treatment, obtaining respectively TFe content range is 65%～68% iron ore concentrate C, TiO
2content range is 55%～80% ilmenite concentrate E and SiO
2content is 57～61% true tailings D.
2. the method for according to claim 1ly utilize that alkali soaks, v-ti magnetite concentrate being selected in pickling and gravity treatment again, is characterized in that described alkaline solution is any one in NaOH or the KOH aqueous solution, NaOH and KOH mixed aqueous solution.
3. the method for according to claim 1ly utilize that alkali soaks, v-ti magnetite concentrate being selected in pickling and gravity treatment again, is characterized in that described gravity treatment adopts
the spiral chute of rice carries out gravity treatment.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104878221A (en) * | 2015-06-12 | 2015-09-02 | 鞍钢集团矿业公司 | Method for utilizing oxidation alkaline leaching and desliming to re-concentrate vanadium-titanium magnetite concentrates |
| CN104894371A (en) * | 2015-06-12 | 2015-09-09 | 鞍钢集团矿业公司 | Method for recleaning of vanadium-titanium magnetite concentrate through oxidation alkaline leaching, acid pickling and reselection |
| CN112680593A (en) * | 2020-11-30 | 2021-04-20 | 河南省睿博环境工程技术有限公司 | Method for dissolving out valuable elements in vanadium-containing stone coal mine |
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| CN104894371A (en) * | 2015-06-12 | 2015-09-09 | 鞍钢集团矿业公司 | Method for recleaning of vanadium-titanium magnetite concentrate through oxidation alkaline leaching, acid pickling and reselection |
| CN112680593A (en) * | 2020-11-30 | 2021-04-20 | 河南省睿博环境工程技术有限公司 | Method for dissolving out valuable elements in vanadium-containing stone coal mine |
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| CN103966423B (en) | 2016-02-03 |
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