CN103966436B - Utilize the method that alkali soaks, v-ti magnetite concentrate is selected in desliming again - Google Patents
Utilize the method that alkali soaks, v-ti magnetite concentrate is selected in desliming again Download PDFInfo
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Abstract
The present invention discloses and a kind ofly utilizes that alkali soaks, the method for v-ti magnetite concentrate is selected in desliming again, comprise the steps: v-ti magnetite concentrate to be placed in the alkaline solution that mass concentration is 5 ~ 52%, at 260 ~ 370 DEG C, alkali leaching reaction 0.5 ~ 5 hour, filters, obtains filtrate and alkali leaching cake A; A is added water be mixed with mass concentration be 21% ~ 25% ore pulp carry out desliming operation, obtain sand setting B and overflow C; Described sand setting B to be TFe content range be 60% ~ 68% final iron ore concentrate, described overflow C is TiO
2content range is the final ilmenite concentrate of 40% ~ 50%.Advantage of the present invention is: achieve and efficiently sort v-ti magnetite concentrate, and alkaline consumption is low, reduces and enters foreign matter content, especially the detrimental impurity TiO such as blast furnace Al and Si
2, S content, improve the capacity factor of a blast furnace, reduce the quantity discharged of blast furnace slag, reduce ironmaking cost, solve smelting process S content high, with serious pollution problem; Improve titanium resource comprehensive utilization ratio simultaneously.
Description
Technical field
The present invention relates to a kind of ore-dressing technique of v-ti magnetite concentrate, particularly relate to and a kind ofly utilize that alkali soaks, the method for v-ti magnetite concentrate is selected in desliming again.
Background technology
Vanadium titano-magnetite is a kind of complex ore of multiple metallic element, is based on the magnetite of the symbiosis of iron content, vanadium, titanium.And one of v-ti magnetite concentrate product that to be vanadium titano-magnetite obtain through ore dressing, wherein vanadium is composed with isomorph and is stored in titanomagnetite, displacement ferric 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 formed.Such as, Chinese Panzhihua Region Midi Concentrator v-ti magnetite green ore and the chemistry of the v-ti magnetite concentrate after selecting iron multielement analysis the results are shown in Table 1, and v-ti magnetite green ore and vanadium titano-magnetite concentrate material phase analysis result are respectively in table 2 and table 3.
Table 1 Chinese Panzhihua Region 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 |
Table 2 Chinese Panzhihua Region Midi Concentrator v-ti magnetite green ore titanium, iron chemical phase analysis result
Table 3 Chinese Panzhihua Region 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, the titanium of about 57% is composed and is stored in titanomagnetite (mFeTiO
3nFe
3o
4) in, the titanium of about 40% is composed and is stored in ilmenite (FeTiO
3) in, because vanadium titano-magnetite ore composition is complicated, character is special, and thus the comprehensive utilization of this kind of ore is the international a great problem always thoroughly do not solved.This occurrence characteristics of vanadium titano-magnetite mineral determines the effective separation adopting physical concentration method cannot realize titanium, iron from the source of ore, 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%) form vitreum, TiO
2lose activity and cannot economic recovery, meanwhile, titanium recovery rate is low only has 18%.Therefore sort titanium iron ore by the beneficiation method of physics and greatly reduce the value that titanium and iron utilizes separately.
China is first country comprehensively extracting iron, vanadium, titanium with technical scale from complicated vanadium titano-magnetite in the world, but due to general physical method fundamentally can not change iron, the tax of the fine and close symbiosis of titanium deposits characteristic, therefore, adopt the physical concentration methods such as common gravity separation method, magnetic method, flotation process to carry out titanium, iron is separated, efficiency is low, is difficult to select of high grade and the ilmenite concentrate that impurity is few or iron ore concentrate; Meanwhile, TiO
2organic efficiency is not high, v-ti magnetite green ore after Mineral separation, the TiO of about 54%
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 S, Si, the Al in iron ore concentrate 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 ", is the magnetic separation after ore grinding, alkaline pretreatment, filtration, again ore grinding of v-ti magnetite green ore is obtained the method for ilmenite concentrate and iron ore concentrate.The method is by iron content 32.16% with containing TiO
2the v-ti magnetite green ore of 12.11%, by magnetic separation process after ore grinding, alkaline pretreatment, filtration, again ore grinding, defines iron content 59.30% iron ore concentrate and contains TiO
2the ilmenite concentrate of 20.15%.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 of alkali leaching preferentially will occur in SiO
2, Al
2o
3with it mineral, define the alkali leaching rear compound similar to titanium in the dipped journey of alkali, the NaOH alkali number of alkali leaching ferrotianium raw ore consumption is 469Kg/t raw ore, and cost is high; And the titanium compound formed after the leaching of ferrotianium raw ore alkali, the compound of the silicon formed after soaking with the gangue mineral alkali such as quartz, it is very difficult for wanting to realize effectively being separated in follow-up magnetic separation, and this also constrains the raising of the rear iron concentrate grade of ferrotianium raw ore alkali leaching and ilmenite concentrate grade.Meanwhile, the method adopts twice grinding process to change mineral surface physicochemical property, adds 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, more high-grade iron ore concentrate and ilmenite concentrate cannot be obtained.
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 that physics and chemistry beneficiation method effectively combines, there is provided a kind of cost low, reclaim quality and efficiency is high, technique is simple, and good operability utilize that alkali soaks, the method for v-ti magnetite concentrate is selected in desliming again, achieve and high efficiency separation is carried out to titanium, iron in v-ti magnetite concentrate, improve into stokehold Iron grade, 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, reduce ironmaking cost, improve TiO simultaneously
2comprehensive resource utilization 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, the method for v-ti magnetite concentrate is selected in desliming again, it is characterized in that comprising the steps:
1) alkali leaching
Be 50% ~ 55%, TiO by TFe content range
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 the alkaline solution that mass concentration is 5% ~ 52%, alkali leaching reaction 0.5 ~ 5 hour at the temperature of 260 DEG C ~ 370 DEG C, 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 be mixed with mass concentration be 21% ~ 25% ore pulp carry out desliming operation, obtain sand setting B and overflow C; Described sand setting B to be TFe content range be 60% ~ 68% final iron ore concentrate, described overflow C is TiO
2content range is the final ilmenite concentrate of 40% ~ 50%.
Described alkaline solution 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 to carry out desliming operation.
Advantage of the present invention is:
Method synthesis of the present invention uses the method process v-ti magnetite concentrate of alkali leaching, desliming, achieves titanium in v-ti magnetite concentrate, iron high efficiency separation; In isolated iron ore concentrate, S content significantly reduces simultaneously, is down to is less than 0.10%, SiO by more than 0.50%
2content is down to less than 3%, Al by 3% ~ 6%
2o
3content is down to less than 3% by 3% ~ 6%, for subsequent smelting creates better condition.
The process of alkali leaching has carried out chemical reaction to elements such as Ti, S, Si, Al in v-ti magnetite concentrate, defines corresponding salt.With v-ti magnetite concentrate unlike, 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%), in alkali leaching ilmenite raw ore process, because the process of alkali leaching preferentially will occur in SiO
2, Al
2o
3deng on mineral, alkali is made to soak v-ti magnetite concentrate more less than alkali leaching ferrotianium raw ore alkali consumption, better effects if.Such as, when soaking with NaOH alkali, the alkali number that the present invention consumes is less than 100kg/t concentrate, reduces more than 4.6 times than the alkali number 469kg/t raw ore of alkali leaching raw ore consumption.
Desliming process presses granularity and the gravity grading of mineral, and the titanium compound generated after alkali leaching is than the fine size of magnet mineral, and proportion is little, and the difference of specific gravity of ferrotianium is comparatively large, achieves effective separation of ferrotianium.Iron concentrate grade brings up to 60% ~ 68% by 50% ~ 55%, is less than 0.1%, SiO in iron ore concentrate containing S amount simultaneously
2and Al
2o
3content is all less than 3%, TiO
2content is down to less than 6% by 12.91%.Meanwhile, TiO can also be obtained
2content is the ilmenite concentrate of 40% ~ 50%.Employing the method achieves and is effectively separated titanium, iron, reduces and enters 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, reduce ironmaking cost, improve titanium resource comprehensive utilization ratio simultaneously.
Accompanying drawing explanation
Fig. 1 is present invention process schema.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further:
As shown in Figure 1.
Embodiment 1:
1) alkali leaching
Be 53.1%, TiO by TFe content
2content is 11.2%, SiO
2content is 3.45%, Al
2o
3content is 4.13%, the v-ti magnetite concentrate of S content 0.65%, be placed in the NaOH alkaline solution that mass concentration is 20%, alkali leaching reaction 4 hours at the temperature of 280 DEG C, 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) desliming
By step 1) in alkali leaching cake A add water be mixed with mass concentration be 24% the ore pulp desliming bucket that feeds ∮ 3.0 meters carry out desliming operation, obtain sand setting B and overflow C; Described sand setting B to be TFe content be 61.7% final iron ore concentrate (SiO
2content is 1.50%, Al
2o
3content is 1.65%, S content is 0.02%), described overflow C is TiO
2content is the final ilmenite concentrate of 42%.
Embodiment 2:
1) alkali leaching
Be 52.6%, TiO by TFe content
2content is 12.4%, SiO
2content is 3.62%, Al
2o
3content is 5.55%, the v-ti magnetite concentrate of S content 0.78%, be placed in the NaOH alkaline solution that mass concentration is 10%, alkali leaching reaction 5 hours at the temperature of 370 DEG C, reactant is filtered, obtain filtrate and alkali leaching cake A, NaOH consumption 95kg/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 be mixed with mass concentration be 23% the ore pulp desliming bucket that feeds ∮ 5.0 meters carry out desliming operation, obtain sand setting B and overflow C; Described sand setting B to be TFe content be 67.7% final iron ore concentrate (SiO
2content is 0.53%, Al
2o
3content is 1.24%, S content is 0.02%), described overflow C is TiO
2content is the final ilmenite concentrate of 46.3%.
Embodiment 3:
1) alkali leaching
Be 53.2%, TiO by TFe content
2content is 12.7%, SiO
2content is 4.18%, Al
2o
3content is 5.52%, the v-ti magnetite concentrate of S content 0.72%, be placed in the NaOH alkaline solution that mass concentration is 35%, alkali leaching reaction 3 hours at the temperature of 280 DEG C, reactant is filtered, obtain filtrate and alkali leaching cake A, NaOH consumption 86kg/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 be mixed with mass concentration be 25% the ore pulp desliming bucket that feeds ∮ 5.0 meters carry out desliming operation, obtain sand setting B and overflow C; Described sand setting B to be TFe content be 62.5% final iron ore concentrate (SiO
2content is 0.66%, Al
2o
3content is 1.49%, S content is 0.02%), described overflow C is TiO
2content is the final ilmenite concentrate of 41.3%.
Embodiment 4:
1) alkali leaching
Be 52.5%, TiO by TFe content
2content is 13.8%, SiO
2content is 3.99%, Al
2o
3content is 4.60%, the v-ti magnetite concentrate of S content 0.59%, be placed in the NaOH alkaline solution that mass concentration is 40%, alkali leaching reaction 2 hours at the temperature of 340 DEG C, reactant is filtered, obtain filtrate and alkali leaching cake A, NaOH consumption 90kg/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 be mixed with mass concentration be 21% the ore pulp desliming bucket that feeds ∮ 3.0 meters carry out desliming operation, obtain sand setting B and overflow C; Described sand setting B to be TFe content be 66.9% final iron ore concentrate (SiO
2content is 0.46%, Al
2o
3content is 1.55%, S content is 0.01%), described overflow C is TiO
2content is the final ilmenite concentrate of 45.1%.
Embodiment 5:
1) alkali leaching
Be 55.1%, TiO by TFe content
2content is 10.1%, SiO
2content is 3.92%, Al
2o
3content is 4.75%, the v-ti magnetite concentrate of S content 0.62%, be placed in the KOH alkaline solution that mass concentration is 25%, alkali leaching reaction 0.5 hour at the temperature of 360 DEG C, reactant is filtered, obtain filtrate and alkali leaching cake A, KOH consumption 77kg/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 be mixed with mass concentration be 21% the ore pulp desliming bucket that feeds ∮ 3.0 meters carry out desliming operation, obtain sand setting B and overflow C; Described sand setting B to be TFe content be 65.4% final iron ore concentrate (SiO
2content is 0.55%, Al
2o
3content is 1.76%, S content is 0.01%), described overflow C is TiO
2content is the final ilmenite concentrate of 49.1%.
Embodiment 6:
1) alkali leaching
Be 53.2%, TiO by TFe content
2content is 12.3%, SiO
2content is 3.78%, Al
2o
3content is 4.66%, the v-ti magnetite concentrate of S content 0.61%, be placed in the KOH alkaline solution that mass concentration is 7%, alkali leaching reaction 2 hours at the temperature of 300 DEG C, reactant is filtered, obtain filtrate and alkali leaching cake A, KOH consumption 75kg/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 be mixed with mass concentration be 22% the ore pulp desliming bucket that feeds ∮ 5.0 meters carry out desliming operation, obtain sand setting B and overflow C; Described sand setting B to be TFe content be 64.6% final iron ore concentrate (SiO
2content is 0.48%, Al
2o
3content is 1.13%, S content is 0.01%), described overflow C is TiO
2content is the final ilmenite concentrate of 43.7%.
Embodiment 7:
1) alkali leaching
Be 53.2%, TiO by TFe content
2content is 12.3%, SiO
2content is 3.78%, Al
2o
3content is 4.66%, the v-ti magnetite concentrate of S content 0.61%, be placed in that NaOH mass concentration is 15%, KOH mass concentration is the alkaline solution of 5%, alkali leaching reaction 3 hours at the temperature of 295 DEG C, reactant is filtered, filtrate and alkali leaching cake A, NaOH consumption 30kg/t to ore deposit, KOH consumption 45kg/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 be mixed with mass concentration be 21% the ore pulp desliming bucket that feeds ∮ 5.0 meters carry out desliming operation, obtain sand setting B and overflow C; Described sand setting B to be TFe content be 64.9% final iron ore concentrate (SiO
2content is 0.42%, Al
2o
3content is 1.14%, S content is 0.01%), described overflow C is TiO
2content is the final ilmenite concentrate of 43.2%.
Claims (2)
1. utilize the method that alkali soaks, v-ti magnetite concentrate is selected in desliming again, it is characterized in that comprising the steps:
1) alkali leaching
Be 50% ~ 55%, TiO by TFe content range
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 be 5% ~ 52% NaOH alkaline solution, KOH alkaline solution or NaOH and KOH mixed ammonium/alkali solutions any one, alkali leaching reaction 0.5 ~ 5 hour at the temperature of 260 DEG C ~ 370 DEG C, 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 be mixed with mass concentration be 21% ~ 25% ore pulp carry out desliming operation, obtain sand setting B and overflow C; Described sand setting B to be TFe content range be 60% ~ 68% final iron ore concentrate, described overflow C is TiO
2content range is the final ilmenite concentrate of 40% ~ 50%.
2. the method utilizing alkali leaching desliming to select v-ti magnetite concentrate more according to claim 1, is characterized in that described desliming operation adopts the desliming bucket of ∮ 3 ~ 5 meters to carry out desliming operation.
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CN104962737A (en) * | 2015-06-12 | 2015-10-07 | 鞍钢集团矿业公司 | Method for recleaning vanadium-titanium magnetite concentrate through oxidative alkaline leaching and de-sliming |
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Address after: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Patentee after: Anshan Iron and Steel Group Mining Co., Ltd. Address before: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Patentee before: Anshan Iron & Steel Group Mining Co., Ltd. |