CN103977880A - Method for recleaning of vanadium-titanium magnetite concentrates by utilizing alkaline leaching, desliming and magnetic-gravity combined separation - Google Patents
Method for recleaning of vanadium-titanium magnetite concentrates by utilizing alkaline leaching, desliming and magnetic-gravity combined separation Download PDFInfo
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Abstract
The invention discloses a method for recleaning of vanadium-titanium magnetite concentrates by utilizing alkaline leaching, desliming and magnetic-gravity combined separation. The method comprises the following steps of placing the vanadium-titanium magnetite concentrates into aqueous alkali with the mass concentration of 5-52%, carrying out alkaline leaching reaction at 280-370 DEG C for 0.5-5 hours and filtering to obtain filtrate and an alkaline leaching filter cake A; adding water to the A to prepare pulp with the mass concentration of 21-25% to carry out desliming operation so as to obtain sunk sand B and overflow C; adding water to the B to prepare pulp with the mass concentration of 30-41% to carry out magnetic-gravity combined recleaning so as to obtain iron ore concentrates with the TFe content of 63-68% and titanium ore concentrates with the TiO2 content of 50-70% respectively. The method has the advantages that the vanadium-titanium magnetite concentrates are effectively sorted, the alkali consumption is low, the content of impurities, such as Al and Si, in a blast furnace, in particular the content of detrimental impurities TiO2 and S, is reduced, the utilization coefficient of the blast furnace is increased, the discharge of the blast furnace slag is reduced, the iron making cost is reduced, the problems of high content of S and serious pollution in a smelting process are solved, and meanwhile, the comprehensive utilization 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, relate in particular to and a kind ofly utilize that alkali soaks, desliming and magnetic reconnection close the method for selecting again v-ti magnetite concentrate.
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.
CN201310183580.8 discloses " a kind of wet-treating 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-treating 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, desliming and magnetic reconnection close the method for selecting again v-ti magnetite concentrate, 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, 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
Of the present inventionly a kind ofly utilize that alkali soaks, desliming and magnetic reconnection close the method for selecting again v-ti magnetite concentrate, it 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% aqueous slkali, 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) desliming
By step 1) in alkali leaching cake A add water to be mixed with mass concentration be that 21%～25% ore pulp carries out desliming operation, obtain sand setting B and overflow C.
3) magnetic reconnection closes ore dressing
By step 2) in sand setting B add water and make the ore pulp of mass concentration 30%～34% and carry out magnetic separation, respectively magnetic concentrate D and magnetic tailing E;
Again magnetic tailing E is added to water and makes the ore pulp of mass concentration 36%～41% and carry out gravity treatment, respectively gravity concentrate F and gravity tailings G, described magnetic concentrate D is that TFe content range is 63%～68% final iron ore concentrate, gravity concentrate F and overflow C merge into TiO
2content range is 50%～70% final ilmenite concentrate, and gravity tailings G is true tailings.
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 0.12T～0.15T 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 0.12T～0.15T and 0.03T～0.05T magnetic dewater cone to carry out two stages of magnetic separation.
Described gravity treatment adopts the spiral chute of 1.2 meters of ￠ 0.6～￠ to carry out gravity treatment.
Advantage of the present invention is:
The method that method synthesis of the present invention uses that alkali soaks, desliming, magnetic reconnection are closed is processed v-ti magnetite concentrate, 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.
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.
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 reconnection and close ore dressing, 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 50%～70% ilmenite concentrate.Adopt the method, realized 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 process chart that the present invention adopts two stages of magnetic separation.
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) alkali soaks
By TFe content, be 50.8%, TiO
2content is 14.9%, SiO
2content is 4.96%, Al
2o
3content is 4.87%, the v-ti magnetite concentrate of S content 0.82%, be placed in mass concentration and be 15% NaOH aqueous slkali, at the temperature of 370 ℃, alkali soaks reaction 3 hours, reactant is filtered, obtain filtrate and alkali leaching cake A, NaOH consumption 85kg/t is to ore deposit, and described filtrate feeds recovery and processing system, and its chemical equation is:
2) desliming
By step 1) in alkali leaching cake A 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 B and overflow C.
3) magnetic reconnection closes ore dressing
By step 2) in sand setting B add water and make the ore pulp of mass concentration 34% to feed field intensity be that 0.13T drum magnetic separator carries out magnetic separation, obtain magnetic concentrate D and magnetic tailing E;
Again magnetic tailing E is added to water and makes the ore pulp of mass concentration 41% and carry out gravity treatment, respectively gravity concentrate F and gravity tailings G, described magnetic concentrate D is that TFe content range is 67.9% final iron ore concentrate (SiO
2content is 0.33%, Al
2o
3content is 1.25%, S content is 0.01%), gravity concentrate F and overflow C merge into TiO
2content range is 65.0% final ilmenite concentrate, and gravity tailings G is true tailings.
Embodiment 2:
As shown in Figure 1.
1) alkali soaks
By TFe content, be 51.3%, TiO
2content is 14.2%, SiO
2content is 4.71%, Al
2o
3content is 4.99%, the v-ti magnetite concentrate of S content 0.83%, be placed in mass concentration and be 8% NaOH aqueous slkali, at the temperature of 280 ℃, alkali soaks reaction 4 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) desliming
By step 1) in alkali leaching cake A add water to be mixed with mass concentration be that the desliming bucket that 22% ore pulp feeds 5.0 meters of ∮ carries out desliming operation, obtain sand setting B and overflow C.
3) magnetic reconnection closes ore dressing
By step 2) in sand setting B add water and make the ore pulp of mass concentration 33% to feed field intensity be that 0.05T magnetic dewater cone carries out magnetic separation, obtain magnetic concentrate D and magnetic tailing E;
Again magnetic tailing E is added to water and makes the ore pulp of mass concentration 38% and carry out gravity treatment, respectively gravity concentrate F and gravity tailings G, described magnetic concentrate D is that TFe content range is 63.3% final iron ore concentrate (SiO
2content is 0.50%, Al
2o
3content is 1.58%, S content is 0.02%), gravity concentrate F and overflow C merge into TiO
2content range is 52.6% final ilmenite concentrate, and gravity tailings G is true tailings.
Embodiment 3:
As shown in Figure 1.
1) alkali soaks
By TFe content, be 52.7%, TiO
2content is 13.1%, SiO
2content is 4.71%, Al
2o
3content is 4.81%, the v-ti magnetite concentrate of S content 0.82%, is placed in mass concentration and is 30% N
ain OH aqueous slkali, at the temperature of 290 ℃, alkali soaks reaction 5 hours, and reactant is filtered, and obtains filtrate and alkali leaching cake A, and NaOH consumption 85kg/t is to ore deposit, and described filtrate feeds recovery and processing system, and its chemical equation is with embodiment 1.
2) desliming
By step 1) in alkali leaching cake A 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 B and overflow C;
3) magnetic reconnection closes ore dressing
By step 2) in sand setting B add water and make the ore pulp of mass concentration 32% to feed field intensity be that 0.03T magnetic dewater cone carries out magnetic separation, obtain magnetic concentrate D and magnetic tailing E;
Again magnetic tailing E is added to water and makes the ore pulp of mass concentration 37% and carry out gravity treatment, respectively gravity concentrate F and gravity tailings G, described magnetic concentrate D is that TFe content range is 64.6% final iron ore concentrate (SiO
2content is 0.48%, Al
2o
3content is 1.56%, S content is 0.02%), gravity concentrate F and overflow C merge into TiO
2content range is 57.3% final ilmenite concentrate, and gravity tailings G is true tailings.
Embodiment 4:
As shown in Figure 2.
1) alkali soaks
By TFe content, be 53.2%, TiO
2content is 12.8%, SiO
2content is 4.75%, Al
2o
3content is 4.81%, the v-ti magnetite concentrate of S content 0.86%, be placed in mass concentration and be 40% NaOH aqueous slkali, at the temperature of 360 ℃, alkali soaks reaction 1 hour, 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) desliming
By step 1) in alkali leaching cake A 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 B and overflow C.
3) magnetic reconnection closes ore dressing
By step 2) in sand setting B add water and make the ore pulp of mass concentration 30% to feed field intensity be that the magnetic dewater cone of 0.03T carries out a stages of magnetic separation, obtain respectively magnetic essence D1 and a magnetic tail E1; Ore pulp to a magnetic essence D1 mass concentration 32% adopts the drum magnetic separator that field intensity is 0.13T to carry out two stages of magnetic separation, obtains respectively two magnetic essence D2 bis-magnetic tail E2.
The spiral chute that the ore pulp of two magnetic tail E2 mass concentrations 40% is fed to 0.6 meter of ￠ again carries out gravity treatment, obtains respectively gravity concentrate F and gravity tailings G, and described two magnetic essence D2 and gravity concentrate F are that TFe content is 66.5% final iron ore concentrate (SiO
2content is 0.43%, Al
2o
3content is 1.35%, S content is 0.01%), a magnetic tail E1 and overflow C merge into TiO
2content is 68.9% ilmenite concentrate, and described gravity tailings G is true tailings.
Embodiment 5:
As shown in Figure 1.
1) alkali soaks
By TFe content, be 53.9%, TiO
2content is 11.3%, SiO
2content is 3.28%, Al
2o
3content is 4.75%, the v-ti magnetite concentrate of S content 0.68%, be placed in mass concentration and be 10% KOH aqueous slkali, at the temperature of 310 ℃, alkali soaks reaction 4.0 hours, reactant is filtered, obtain filtrate and alkali leaching cake A, KOH consumption 85kg/t is to ore deposit, and described filtrate feeds recovery and processing system, and its chemical equation is:
2) desliming
By step 1) in alkali leaching cake A 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 B and overflow C.
3) magnetic reconnection closes ore dressing
By step 2) in sand setting B add water and make the ore pulp of mass concentration 31% to feed field intensity be that 0.05T magnetic dewater cone carries out magnetic separation, obtain magnetic concentrate D and magnetic tailing E;
Again magnetic tailing E is added to water and makes the ore pulp of mass concentration 39% and carry out gravity treatment, respectively gravity concentrate F and gravity tailings G, described magnetic concentrate D is that TFe content range is 65.1% final iron ore concentrate (SiO
2content is 0.60%, Al
2o
3content is 1.76%, S content is 0.01%), gravity concentrate F and overflow C merge into TiO
2content range is 60.8% final ilmenite concentrate, and gravity tailings G is true tailings.
Embodiment 6:
As shown in Figure 2.
1) alkali soaks
By TFe content, be 54.6%, TiO
2content is 10.5%, SiO
2content is 3.87%, Al
2o
3content is 4.72%, the v-ti magnetite concentrate of S content 0.66%, be placed in mass concentration and be 25% KOH aqueous slkali, at the temperature of 310 ℃, alkali soaks reaction 4.5 hours, reactant is filtered, obtain filtrate and alkali leaching cake A, KOH consumption 8kg/t is to ore deposit, and described filtrate feeds recovery and processing system, and its chemical equation is with embodiment 5.
2) desliming
By step 1) in alkali leaching cake A 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 B and overflow C.
3) magnetic reconnection closes ore dressing
By step 2) in sand setting B add water and make the ore pulp of mass concentration 31% to feed field intensity be that the magnetic dewater cone of 0.03T carries out a stages of magnetic separation, obtain respectively magnetic essence D1 and a magnetic tail E1; Ore pulp to a magnetic essence D1 mass concentration 34% adopts the drum magnetic separator that field intensity is 0.13T to carry out two stages of magnetic separation, obtains respectively two magnetic essence D2 bis-magnetic tail E2.
The spiral chute that the ore pulp of two magnetic tail E2 mass concentrations 39% is fed to 0.9 meter of ￠ again carries out gravity treatment, obtains respectively gravity concentrate F and gravity tailings G, and described two magnetic essence D2 and gravity concentrate F are that TFe content is 66.9% final iron ore concentrate (SiO
2content is 0.38%, Al
2o
3content is 1.35%, S content is 0.01%), a magnetic tail E1 and overflow C merge into TiO
2content is 55.7% ilmenite concentrate, and described gravity tailings G is true tailings.
Embodiment 7:
As shown in Figure 2.
1) alkali soaks
By TFe content, be 54.2%, TiO
2content is 10.9%, SiO
2content is 3.80%, Al
2o
3content is 4.68%, the v-ti magnetite concentrate of S content 0.63%, the aqueous slkali that be placed in NaOH mass concentration and be 25%, KOH mass concentration is 5%, at the temperature of 290 ℃, alkali soaks reaction 5.0 hours, reactant is filtered, obtain filtrate and alkali leaching cake A, NaOH consumption 30kg/t is to ore deposit, and KOH consumption 50kg/t is to ore deposit, described filtrate feeds recovery and processing system, and its chemical equation is with embodiment 1 and embodiment 5.
2) desliming
By step 1) in alkali leaching cake A 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 B and overflow C.
3) magnetic reconnection closes ore dressing
By step 2) in sand setting B add water and make the ore pulp of mass concentration 31% to feed field intensity be that the magnetic dewater cone of 0.03T carries out a stages of magnetic separation, obtain respectively magnetic essence D1 and a magnetic tail E1; Ore pulp to a magnetic essence D1 mass concentration 34% adopts the drum magnetic separator that field intensity is 0.13T to carry out two stages of magnetic separation, obtains respectively two magnetic essence D2 bis-magnetic tail E2.
The spiral chute that the ore pulp of two magnetic tail E2 mass concentrations 39% is fed to 0.9 meter of ￠ again carries out gravity treatment, obtains respectively gravity concentrate F and gravity tailings G, and described two magnetic essence D2 and gravity concentrate F are that TFe content is 66.5% final iron ore concentrate (SiO
2content is 0.33%, Al
2o
3content is 1.30%, S content is 0.01%), a magnetic tail E1 and overflow C merge into TiO
2content is 56.2% ilmenite concentrate, and described gravity tailings G is true tailings.
Claims (7)
1. utilize that alkali soaks, desliming and magnetic reconnection close a method of selecting again v-ti magnetite concentrate, it 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% aqueous slkali, 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) desliming
By step 1) in alkali leaching cake A add water to be mixed with mass concentration be that 21%～25% ore pulp carries out desliming operation, obtain sand setting B and overflow C;
3) magnetic reconnection closes ore dressing
By step 2) in sand setting B add water and make the ore pulp of mass concentration 30%～34% and carry out magnetic separation, respectively magnetic concentrate D and magnetic tailing E;
Again magnetic tailing E is added to water and makes the ore pulp of mass concentration 36%～41% and carry out gravity treatment, respectively gravity concentrate F and gravity tailings G, described magnetic concentrate D is that TFe content range is 63%～68% final iron ore concentrate, gravity concentrate F and overflow C merge into TiO
2content range is 50%～70% final ilmenite concentrate, and gravity tailings G is true tailings.
2. according to claim 1ly utilize that alkali soaks, desliming and magnetic reconnection close the method for selecting again v-ti magnetite concentrate, it is characterized in that described aqueous slkali is any one in NaOH or the KOH aqueous solution, NaOH and KOH mixed aqueous solution.
3. according to claim 1ly utilize that alkali soaks, desliming and magnetic reconnection close the method for selecting again v-ti magnetite concentrate, it is characterized in that described desliming operation adopts the desliming bucket of 3～5 meters of ∮ to carry out desliming operation.
4. according to claim 1ly utilize that alkali soaks, desliming and magnetic reconnection close the method for selecting again v-ti magnetite concentrate, it is characterized in that described magnetic separation adopts the drum magnetic separator of 0.12T～0.15T to carry out magnetic separation.
5. according to claim 1ly utilize that alkali soaks, desliming and magnetic reconnection close the method for selecting again v-ti magnetite concentrate, it is characterized in that described magnetic separation adopts the magnetic dewater cone of 0.03T～0.05T to carry out magnetic separation.
6. according to claim 1ly utilize that alkali soaks, desliming and magnetic reconnection close the method for selecting again v-ti magnetite concentrate, it is characterized in that described magnetic separation adopts respectively the drum magnetic separator of 0.12T～0.15T and 0.03T～0.05T magnetic dewater cone to carry out two stages of magnetic separation.
7. according to claim 1ly utilize that alkali soaks, desliming and magnetic reconnection close the method for selecting again v-ti magnetite concentrate, it is characterized in that described gravity treatment adopts the spiral chute of 1.2 meters of ￠ 0.6～￠ to carry out gravity treatment.
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|---|---|---|---|
| CN201410165798.5A CN103977880B (en) | 2014-04-23 | 2014-04-23 | Method for recleaning of vanadium-titanium magnetite concentrates by utilizing alkaline leaching, desliming and magnetic-gravity combined separation |
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| CN201410165798.5A CN103977880B (en) | 2014-04-23 | 2014-04-23 | Method for recleaning of vanadium-titanium magnetite concentrates by utilizing alkaline leaching, desliming and magnetic-gravity combined separation |
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| CN103977880B CN103977880B (en) | 2017-01-11 |
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| CN201410165798.5A Active CN103977880B (en) | 2014-04-23 | 2014-04-23 | Method for recleaning of vanadium-titanium magnetite concentrates by utilizing alkaline leaching, desliming and magnetic-gravity combined separation |
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| CN104962736A (en) * | 2015-06-12 | 2015-10-07 | 鞍钢集团矿业公司 | Method for recleaning vanadium-titanium magnetite concentrate through forging, oxidative alkaline leaching and de-sliming |
| CN105296752A (en) * | 2015-06-12 | 2016-02-03 | 鞍钢集团矿业公司 | Method for recleaning vanadium-titanium magnetite concentrates by using oxidation and alkaline leaching, desliming and combined magneto-gravity separation |
| CN107511256A (en) * | 2017-08-09 | 2017-12-26 | 攀枝花学院 | The method that iron oxide is extracted from mine tailing |
| CN114438309A (en) * | 2022-01-18 | 2022-05-06 | 河南佰利联新材料有限公司 | Method for reducing impurities and upgrading titanium-rich material of low-quality titanium concentrate |
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