CN103962222A - Method for recleaning of vanadium-titanium magnetite concentrates through calcination, alkaline leaching, desliming and magnetic separation - Google Patents
Method for recleaning of vanadium-titanium magnetite concentrates through calcination, alkaline leaching, desliming and magnetic separation Download PDFInfo
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Abstract
The invention discloses a method for recleaning of vanadium-titanium magnetite concentrates through calcination, alkaline leaching, desliming and magnetic separation. The method comprises the following steps that CaO is added to the vanadium-titanium magnetite concentrates, the mixture is calcined for 20 to 60 minutes at the temperature ranging from 800 DEG C to 1400 DEG C, and therefore a calcined product A is formed; the product A is placed in an alkaline solution, an alkaline leaching reaction is conducted for 0.5 to 5 hours at the temperature ranging from 300 DEG C to 370 DEG C, and filtrate and an alkaline leaching filter cake B are obtained through filtration; water is added to the alkaline leaching filter cake B, so that ore pulp is prepared and fed for desliming operation, and settling sand C and overflow D are obtained; water is added to the settling sand C, so that ore pulp is prepared for magnetic separation, and final iron ore concentrates with the TFe content ranging from 63% to 68% and final titanium concentrates with the TiO2 content ranging from 35% to 50% are screened. The method has the advantages that consumption of NaOH or KOH is reduced, the vanadium-titanium magnetite concentrates are efficiently screened, alkali consumption is low, the content of impurities such as Al and Si which enter a blast furnace is reduced, the blast furnace use coefficient is increased, the problems of the high S content and serious pollution in the smelting process are solved, and meanwhile the comprehensive use rate of titanium resources is improved.
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 calcining, alkali soak, v-ti magnetite concentrate being selected in desliming and magnetic separation again.
Background technology
Vanadium titano-magnetite is a kind of grandidierite of multiple metallic element, is that to take iron content, vanadium, titanium be the magnetic iron ore 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 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 upgrading method cannot realize from the source of ore effective separation of titanium, iron, cause v-ti magnetite ore after physical upgrading, iron concentrate grade low (TFe<55%), the titanium in iron ore concentrate enters blast furnace slag (TiO completely at ironmaking processes
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 commercial 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 upgrading methods such as common gravity separation method, magnetic method, floatation 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 process, almost all enter slag phase, form TiO
2the blast furnace slag of content 20～24%; In addition, because the impurity contents such as the S in iron ore concentrate, 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 ", be by v-ti magnetite green ore through ore grinding, alkali soak pretreatment, 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 pretreatment, 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 surfaces physicochemical properties, has increased complexity and the process cost of the method.In a word, by this kind of procedure complexity, and in processing procedure, quantity of alkali consumption is large, cost is high; Meanwhile, cannot obtain more high-grade iron ore concentrate and ilmenite 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 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 and utilization calcining, the alkali of good operability soak, v-ti magnetite concentrate is selected in desliming and magnetic separation again method, realized titanium, iron in v-ti magnetite concentrate have been carried out to efficient 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 discharge capacity of blast furnace slag, reduced ironmaking cost, improved TiO
2comprehensive utilization of resources rate has reduced NaOH or KOH consumption simultaneously, has reduced environmental pollution.
In order to realize object of the present invention, technical scheme of the present invention is achieved in that
A method of utilize that calcining, alkali soak, v-ti magnetite concentrate being selected in desliming and magnetic separation again, is characterized in that comprising the steps:
1) calcining
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% by weight the ratio of 1:0.1～0.2 add CaO, at the temperature of 800 ℃～1400 ℃, calcine 20～60 minutes, form calcination product A;
2) alkali soaks
By step 1) in calcination product A to be placed in mass concentration be 5%～52% aqueous slkali, at the temperature of 300 ℃～370 ℃, alkali soaks reaction 0.5～5 hour, reactant is filtered, obtain filtrate and alkali leaching cake B, described filtrate feeds recovery and processing system;
3) desliming
By step 2) in alkali leaching cake B add water to be mixed with mass concentration be that 21%～25% ore pulp carries out desliming operation, obtain sand setting C and overflow D;
4) magnetic separation
By step 3) in sand setting C add water and make the ore pulp of mass concentration 30%～36% and carry out magnetic separation; sort out magnetic concentrate E and magnetic tailing F; described magnetic concentrate E is that TFe content range is 63%～68% final iron ore concentrate, and magnetic tailing F and overflow D merge into TiO
2content range is 35%～50% final ilmenite concentrate.
Described aqueous slkali is any one in NaOH or the KOH aqueous solution, NaOH and KOH mixed aqueous solution.
Described desliming operation adopts the desliming bucket of 3～5 meters of ∮ to carry out desliming operation.
Described magnetic separation adopts the drum magnetic separator of 0.13T～0.16T to carry out magnetic separation.
Described magnetic separation adopts the magnetic dewater cone of 0.03T～0.05T to carry out magnetic separation.
Described magnetic separation adopts respectively the drum magnetic separator of 0.13T～0.16T and 0.03T～0.05T magnetic dewater cone to carry out two stages of magnetic separation.
Advantage of the present invention is:
The method that method synthesis of the present invention uses that calcining, alkali soak, v-ti magnetite concentrate is selected in desliming and magnetic separation again, has realized titanium in v-ti magnetite concentrate, iron efficiently separated; 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.
Calcination process utilizes CaO partly to replace alkali to soak alkali lye consumption in process, has reduced the consumption 20%～30% that follow-up alkali soaks NaOH in operation or KOH; Because CaO price is 1/5～1/6 of NaOH price, be 1/20 of KOH price, therefore can greatly reduce production costs.
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, after calcining, while soaking with NaOH alkali, the alkali number that the present invention consumes is less than 60kg/t concentrate, and the alkali number 469kg/t raw ore that soaks raw ore consumption than alkali has reduced more than 7 times.
Desliming process is pressed granularity and the gravity grading of mineral, and alkali soaks the titanium compound of rear generation than the fine size of magnet mineral, and proportion is little, and the difference of specific gravity of ferrotianium is larger, has realized effective separation of ferrotianium.
Add magnetic separation, magnetic separation utilizes different minerals magnetic contrast to carry out sorting.Alkali soaks titanium is dissociateed from magnetic iron ore lattice, titanium has generated non-magnetic titanium compound, therefore according to magnetic iron ore and titanium compound magnetic contrast, can adopt simple magnetic method that ferrotianium is separated, make iron concentrate grade bring up to 63%～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%; Meanwhile, can also obtain TiO
2content is 35%～50% 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 discharge capacity of blast furnace slag, reduced ironmaking cost, improve titanium resource comprehensive utilization ratio simultaneously.
Accompanying drawing explanation
Fig. 1 is process chart of the present invention.
Fig. 2 is the two stages of magnetic separation process chart that magnetic separation of the present invention adopts drum magnetic separator and magnetic dewater cone.
Fig. 3 is the process chart that magnetic separation of the present invention adopts another embodiment of two stages of magnetic separation of magnetic dewater cone and drum magnetic separator.
The specific 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) calcining
By TFe content, be 50.9%, TiO
2content is 14.3%, SiO
2content is 4.88%, Al
2o
3content is 4.69%, the v-ti magnetite concentrate of S content 0.83%, and the ratio of 1:0.15 adds CaO by weight, calcines 40 minutes at the temperature of 1100 ℃, forms calcination product A, and its chemical equation is:
2) alkali soaks
By step 1) in calcination product A to be placed in mass concentration be 30% NaOH aqueous slkali, at the temperature of 350 ℃, alkali soaks reaction 3.0 hours, reactant is filtered, obtain filtrate and alkali leaching cake B, NaOH consumption 49.0kg/t is to ore deposit, described filtrate feeds recovery and processing system, and its chemical equation is:
m≥1
3) desliming
By step 2) in alkali leaching cake B add water to be mixed with mass concentration be that the desliming bucket that 21% ore pulp feeds 3.0 meters of ∮ carries out desliming operation, obtain sand setting C and overflow D.
4) magnetic separation
By step 3) in sand setting C add water and make the ore pulp of mass concentration 34% to feed field intensity be that the drum magnetic separator of 0.13T carries out magnetic separation, respectively magnetic concentrate E, magnetic tailing F, described magnetic concentrate E is that TFe content is 67.3% final iron ore concentrate (SiO
2content is 0.33%, Al
2o
3content is 1.25%, S content is 0.01%), described magnetic tailing F and overflow D merge into TiO
2content is 41.0% final ilmenite concentrate.
Embodiment 2:
As shown in Figure 1.
1) calcining
By TFe content, be 52.4%, TiO
2content is 14.0%, SiO
2content is 4.36%, Al
2o
3content is 4.52%, the v-ti magnetite concentrate of S content 0.93%, and the ratio of 1:0.13 adds CaO by weight, calcines 35 minutes at the temperature of 1200 ℃, forms calcination product A, and its chemical equation is with embodiment 1.
2) alkali soaks
By step 1) in calcination product A to be placed in mass concentration be 18% NaOH aqueous slkali, at the temperature of 330 ℃, alkali soaks reaction 2.0 hours, reactant is filtered, obtain filtrate and alkali leaching cake B, NaOH consumption 47.2kg/t is to ore deposit, described filtrate feeds recovery and processing system, and its chemical equation is with embodiment 1.
3) desliming
By step 2) in alkali leaching cake B add water to be mixed with mass concentration be that the desliming bucket that 22% ore pulp feeds 3.0 meters of ∮ carries out desliming operation, obtain sand setting C and overflow D.
4) magnetic separation
By step 3) in sand setting C add water and make the ore pulp of mass concentration 31% to feed field intensity be that the drum magnetic separator of 0.15T carries out magnetic separation, respectively magnetic concentrate E, magnetic tailing F, described magnetic concentrate E is that TFe content is 65.6% final iron ore concentrate (SiO
2content is 0.43%, Al
2o
3content is 1.32%, S content is 0.01%), described magnetic tailing F and overflow D merge into TiO
2content is 39.2% final ilmenite concentrate.
Embodiment 3:
As shown in Figure 1.
1) calcining
By TFe content, be 51.3%, TiO
2content is 14.0%, SiO
2content is 4.44%, Al
2o
3content is 4.27%, the v-ti magnetite concentrate of S content 0.79%, and the ratio of 1:0.11 adds CaO by weight, calcines 30 minutes at the temperature of 1300 ℃, forms calcination product A, and its chemical equation is with embodiment 1.
2) alkali soaks
By step 1) in calcination product A to be placed in mass concentration be 42% NaOH aqueous slkali, at the temperature of 350 ℃, alkali soaks reaction 2.0 hours, reactant is filtered, obtain filtrate and alkali leaching cake B, NaOH consumption 52.8kg/t is to ore deposit, described filtrate feeds recovery and processing system, and its chemical equation is with embodiment 1.
3) desliming
By step 2) in alkali leaching cake B add water to be mixed with mass concentration be that the desliming bucket that 23% ore pulp feeds 3.0 meters of ∮ carries out desliming operation, obtain sand setting C and overflow D.
4) magnetic separation
By step 3) in sand setting C add water and make the ore pulp of mass concentration 31% to feed field intensity be that the magnetic dewater cone of 0.05T carries out magnetic separation, respectively magnetic concentrate E, magnetic tailing F, described magnetic concentrate E is that TFe content is 64.0% final iron ore concentrate (SiO
2content is 1.52%, Al
2o
3content is 1.06%, S content is 0.03%), described magnetic tailing F and overflow D merge into TiO
2content is 47.1% final ilmenite concentrate.
Embodiment 4:
As shown in Figure 1.
1) calcining
By TFe content, be 53.9%, TiO
2content is 11.5%, SiO
2content is 4.65%, Al
2o
3content is 4.82%, the v-ti magnetite concentrate of S content 0.88%, and the ratio of 1:0.17 adds CaO by weight, calcines 20 minutes at the temperature of 1400 ℃, forms calcination product A, and its chemical equation is with embodiment 1.
2) alkali soaks
By step 1) in calcination product A to be placed in mass concentration be 46% NaOH aqueous slkali, at the temperature of 370 ℃, alkali soaks reaction 1.0 hours, reactant is filtered, obtain filtrate and alkali leaching cake B, NaOH consumption 46.8kg/t is to ore deposit, described filtrate feeds recovery and processing system, and its chemical equation is with embodiment 1.
3) desliming
By step 2) in alkali leaching cake B add water to be mixed with mass concentration be that the desliming bucket that 24% ore pulp feeds 3.0 meters of ∮ carries out desliming operation, obtain sand setting C and overflow D.
4) magnetic separation
By step 3) in sand setting C add water and make the ore pulp of mass concentration 33% to feed field intensity be that the magnetic dewater cone of 0.05T carries out magnetic separation, respectively magnetic concentrate E, magnetic tailing F, described magnetic concentrate E is that TFe content is 66.5% final iron ore concentrate (SiO
2content is 1.48%, Al
2o
3content is 1.21%, S content is 0.02%), described magnetic tailing F and overflow D merge into TiO
2content is 44.2% final ilmenite concentrate.
Embodiment 5:
As shown in Figure 2.
1) calcining
By TFe content, be 52.5%, TiO
2content is 12.9%, SiO
2content is 3.63%, Al
2o
3content is 4.38%, the v-ti magnetite concentrate of S content 0.72%, and the ratio of 1:0.19 adds CaO by weight, calcines 45 minutes at the temperature of 1000 ℃, forms calcination product A, and its chemical equation is with embodiment 1.
2) alkali soaks
By step 1) in calcination product A to be placed in mass concentration be 36% KOH aqueous slkali, at the temperature of 360 ℃, alkali soaks reaction 1.5 hours, reactant is filtered, obtain filtrate and alkali leaching cake B, KOH consumption 47.2kg/t is to ore deposit, described filtrate feeds recovery and processing system, and its chemical equation is:
m≥1
3) desliming
By step 2) in alkali leaching cake B add water to be mixed with mass concentration be that the desliming bucket that 25% ore pulp feeds 3.0 meters of ∮ carries out desliming operation, obtain sand setting C and overflow D.
4) two stages of magnetic separation
By step 3) in sand setting C add water and make the ore pulp of mass concentration 33% to feed field intensity be that the drum magnetic separator of 0.13T carries out a stages of magnetic separation, obtain a stages of magnetic separation concentrate E1 and a stages of magnetic separation mine tailing F1, it is that the magnetic dewater cone of 0.03T carries out two stages of magnetic separation that a stages of magnetic separation concentrate E1 who is 31% by mass concentration feeds field intensity, obtain two stages of magnetic separation concentrate E2 and two stages of magnetic separation mine tailing F2, two described stages of magnetic separation concentrate E2 are that TFe content is 67.7% final iron ore concentrate (SiO
2content is 0.32%, Al
2o
3content is 1.21%, S content is 0.01%), described two stages of magnetic separation mine tailing F1, F2 and overflow D merge into TiO
2content is 36.0% final ilmenite concentrate.
Embodiment 6:
As shown in Figure 3.
1) calcining
By TFe content, be 54.6%, TiO
2content is 10.8%, SiO
2content is 3.38%, Al
2o
3content is 4.29%, the v-ti magnetite concentrate of S content 0.93%, and the ratio of 1:0.2 adds CaO by weight, calcines 50 minutes at the temperature of 900 ℃, forms calcination product A, and its chemical equation is with embodiment 1.
2) alkali soaks
By step 1) in calcination product A to be placed in mass concentration be 51% KOH aqueous slkali, at the temperature of 370 ℃, alkali soaks reaction 1.0 hours, reactant is filtered, obtain filtrate and alkali leaching cake B, KOH consumption 48.1kg/t is to ore deposit, described filtrate feeds recovery and processing system, and its chemical equation is with embodiment 5.
3) desliming
By step 2) in alkali leaching cake B add water to be mixed with mass concentration be that the desliming bucket that 24% ore pulp feeds 5.0 meters of ∮ carries out desliming operation, obtain sand setting C and overflow D.
4) two stages of magnetic separation
By step 3) in sand setting C add water and make the ore pulp of mass concentration 31% to feed field intensity be that the magnetic dewater cone of 0.05T carries out a stages of magnetic separation, obtain a stages of magnetic separation concentrate E1 and a stages of magnetic separation mine tailing F1, it is that the drum magnetic separator of 0.12T carries out two stages of magnetic separation that a stages of magnetic separation concentrate E1 who is 32% by mass concentration feeds field intensity, obtain two stages of magnetic separation concentrate E2 and two stages of magnetic separation mine tailing F2, two described stages of magnetic separation concentrate E2 are that TFe content is 67.3% final iron ore concentrate (SiO
2content is 0.30%, Al
2o
3content is 1.25%, S content is 0.01%), described two stages of magnetic separation mine tailing F1, F2 and overflow D merge into TiO
2content is 49.2% final ilmenite concentrate.
Embodiment 7:
As shown in Figure 3.
1) calcining
By TFe content, be 54.0%, TiO
2content is 11.8%, SiO
2content is 3.55%, Al
2o
3content is 4.42%, the v-ti magnetite concentrate of S content 0.71%, and the ratio of 1:0.1 adds CaO by weight, calcines 60 minutes at the temperature of 800 ℃, forms calcination product A, and its chemical equation is with embodiment 1.
2) alkali soaks
By step 1) in calcination product A be placed in the aqueous slkali that NaOH mass concentration is 32%, KOH mass concentration is 14%, at the temperature of 310 ℃, alkali soaks reaction 2.0 hours, reactant is filtered, obtain filtrate and alkali leaching cake B, NaOH consumption 35kg/t is to ore deposit, KOH consumption 45.5kg/t is to ore deposit, and described filtrate feeds recovery and processing system, and its chemical equation is with embodiment 1 and embodiment 5.
3) desliming
By step 2) in alkali leaching cake B add water to be mixed with mass concentration be that the desliming bucket that 25% ore pulp feeds 5.0 meters of ∮ carries out desliming operation, obtain sand setting C and overflow D.
4) two stages of magnetic separation
By step 3) in sand setting C add water and make the ore pulp of mass concentration 32% to feed field intensity be that the magnetic dewater cone of 0.05T carries out a stages of magnetic separation, obtain a stages of magnetic separation concentrate E1 and a stages of magnetic separation mine tailing F1, it is that the drum magnetic separator of 0.12T carries out two stages of magnetic separation that a stages of magnetic separation concentrate E1 who is 32% by mass concentration feeds field intensity, obtain two stages of magnetic separation concentrate E2 and two stages of magnetic separation mine tailing F2, two described stages of magnetic separation concentrate E2 are that TFe content is 67.1% final iron ore concentrate (SiO
2content is 0.33%, Al
2o
3content is 1.32%, S content is 0.01%), described two stages of magnetic separation mine tailing F1, F2 and overflow D merge into TiO
2content is 48.5% final ilmenite concentrate.
Claims (6)
1. a method of utilize that calcining, alkali soak, v-ti magnetite concentrate being selected in desliming and magnetic separation again, is characterized in that comprising the steps:
1) calcining
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% by weight the ratio of 1:0.1～0.2 add CaO, at the temperature of 800 ℃～1400 ℃, calcine 20～60 minutes, form calcination product A;
2) alkali soaks
By step 1) in calcination product A to be placed in mass concentration be 5%～52% aqueous slkali, at the temperature of 300 ℃～370 ℃, alkali soaks reaction 0.5～5 hour, reactant is filtered, obtain filtrate and alkali leaching cake B, described filtrate feeds recovery and processing system;
3) desliming
By step 2) in alkali leaching cake B add water to be mixed with mass concentration be that 21%～25% ore pulp carries out desliming operation, obtain sand setting C and overflow D;
4) magnetic separation
By step 3) in sand setting C add water and make the ore pulp of mass concentration 30%～36% and carry out magnetic separation; sort out magnetic concentrate E and magnetic tailing F; described magnetic concentrate E is that TFe content range is 63%～68% final iron ore concentrate, and magnetic tailing F and overflow D merge into TiO
2content range is 35%～50% final ilmenite concentrate.
2. the method that utilization calcining according to claim 1, alkali soak, v-ti magnetite concentrate is selected in desliming and magnetic separation again, is characterized in that described aqueous slkali is any one in NaOH or the KOH aqueous solution, NaOH and KOH mixed aqueous solution.
3. the method that utilization calcining according to claim 1, alkali soak, v-ti magnetite concentrate is selected in desliming and magnetic separation again, is characterized in that described desliming operation adopts the desliming bucket of 3～5 meters of ∮ to carry out desliming operation.
4. the method that utilization calcining according to claim 1, alkali soak, v-ti magnetite concentrate is selected in desliming and magnetic separation again, is characterized in that described magnetic separation adopts the drum magnetic separator of 0.13T～0.16T to carry out magnetic separation.
5. the method that utilization calcining according to claim 1, alkali soak, v-ti magnetite concentrate is selected in desliming and magnetic separation again, is characterized in that described magnetic separation adopts the magnetic dewater cone of 0.03T～0.05T to carry out magnetic separation.
6. the method that utilization calcining according to claim 1, alkali soak, v-ti magnetite concentrate is selected in desliming and magnetic separation again, is characterized in that described magnetic separation adopts respectively the drum magnetic separator of 0.13T～0.16T and 0.03T～0.05T magnetic dewater cone to carry out two stages of magnetic separation.
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|---|---|---|---|
| CN201410164282.9A CN103962222B (en) | 2014-04-23 | 2014-04-23 | Utilize the method that v-ti magnetite concentrate is selected in calcining, alkali leaching, desliming and magnetic separation again |
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|---|---|---|---|
| CN201410164282.9A CN103962222B (en) | 2014-04-23 | 2014-04-23 | Utilize the method that v-ti magnetite concentrate is selected in calcining, alkali leaching, desliming and magnetic separation again |
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| CN103962222A true CN103962222A (en) | 2014-08-06 |
| CN103962222B CN103962222B (en) | 2016-07-06 |
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| CN201410164282.9A Active CN103962222B (en) | 2014-04-23 | 2014-04-23 | Utilize the method that v-ti magnetite concentrate is selected in calcining, alkali leaching, desliming and magnetic separation again |
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