CN103962229B - Utilize calcining, alkali soaks, classification and magnetic reconnection close and select v-ti magnetite concentrate method again - Google Patents
Utilize calcining, alkali soaks, classification and magnetic reconnection close and select v-ti magnetite concentrate method again Download PDFInfo
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Abstract
The present invention discloses and a kind ofly utilizes that calcining, alkali soak, classification and magnetic reconnection close the method for selecting again v-ti magnetite concentrate, comprises the steps:, by adding CaO the temperature lower calcination of 800 DEG C～1400 DEG C 20～60 minutes in v-ti magnetite concentrate, to form calcination product A; It is that 5%～52% aqueous slkali alkali soaks reaction 0.5～5 hour that product A is placed in to mass concentration, filter, obtain filtrate and alkali leaching cake B, B is added water and is made into ore pulp and feeds cyclone and carry out classification, classification goes out sand setting C and overflow Y, then the sand setting C ore pulp of making mass concentration 30%～41% that adds water is carried out to magnetic separation and gravity treatment. Advantage of the present invention is: reduced NaOH or KOH consumption, realize v-ti magnetite concentrate has efficiently been sorted, alkaline consumption is low, reduce and enter the impurity contents such as blast furnace Al and Si, improve the capacity factor of a blast furnace, reduce the discharge capacity of blast furnace slag, reduced 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, relate in particular to a kind of utilize calcining, alkali soak,Classification and magnetic reconnection close and select v-ti magnetite concentrate method again.
Background technology
Vanadium titano-magnetite is a kind of grandidierite of multiple metallic element, is taking iron content, vanadium, titanium as main symbiosisMagnetic iron ore. And v-ti magnetite concentrate is one of product of vanadium titano-magnetite process ore dressing acquisition, wherein vanadium is with classMatter is stored in titanomagnetite with resembling to compose, displacement high price iron ion. Titanomagnetite is oikocryst mineral (Fe3Ｏ4) and chadacrystOre deposit [ulvite 2FeOTiO2, ilmenite FeOTiO2, aluminum-spinel (Mg, Fe) (Al, Fe)2Ｏ4】The complex forming. For example, Chinese Panzhihua Region Midi Concentrator v-ti magnetite green ore and selecting after ironV-ti magnetite concentrate chemistry multielement analysis the results are shown in Table 1, v-ti magnetite green ore and vanadium titano-magnetite concentrateMaterial phase analysis result is 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 | Fe2O3 | TiO2 | V2O5 |
| Raw ore | 29.53 | 21.36 | 20.20 | 0.631 | 17.70 | 10.54 | 0.278 |
| Concentrate | 54.01 | 32.42 | 51.16 | 0.574 | 40.97 | 12.67 | 0.61 |
| Element | SiO2 | Al2O3 | CaO | MgO | Co | P | As |
| Raw ore | 22.80 | 7.65 | 6.36 | 7.23 | 0.02 | 0.015 | <0.01 |
| Concentrate | 3.21 | 3.30 | 0.98 | 2.90 | 0.02 | 0.008 | <0.010 |
The Chinese Panzhihua Region of table 2 Midi Concentrator v-ti magnetite green ore titanium, iron chemical phase analysis result
The Chinese Panzhihua Region of table 3 Midi Concentrator vanadium titano-magnetite concentrate titanium, iron chemical phase analysis result
Vanadium titano-magnetite aboundresources in the world, whole world reserves reach more than 40,000,000,000 tons, and reserves in China reaches 98.3Hundred million tons. In v-ti magnetite ore, iron is mainly composed and is stored in titanomagnetite, the TiO in ore2Main tax is stored in grainIn shape ilmenite and titanomagnetite. Generally, approximately 57% titanium is composed and is stored in titanomagnetite (mFeTiO3·nFe3Ｏ4) in, approximately 40% titanium is composed and is stored in ilmenite (FeTiO3) in, due to vanadium titano-magnetite ore groupBecome complicated, character is special, thereby the comprehensive utilization of this class ore is the international disaster always thoroughly not solvingTopic. This occurrence characteristics of vanadium titano-magnetite mineral has determined that employing physical upgrading method cannot be from the source of oreHead is realized effective separation of titanium, iron, causes v-ti magnetite ore after physical upgrading, and iron concentrate grade is low(TFe < 55%), the titanium in iron ore concentrate enters blast furnace slag (TiO completely at ironmaking processes2Content reach 22% withOn) formation vitreum, TiO2Lost actively 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 titanium and the iron value of utilization separately.
China is that first comprehensively extracts iron, vanadium, titanium from complicated vanadium titano-magnetite with commercial scale in the worldCountry, but characteristic is deposited in the tax that can not fundamentally change the fine and close symbiosis of iron, titanium due to general physical method,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, TiO2Organic efficiency is notHeight, v-ti magnetite green ore after Mineral separation, approximately 54% TiO2Enter iron ore concentrate, these TiO2After blast furnace process, almost all enter slag phase, form TiO2The blast furnace slag of content 20～24%; In addition, byThe impurity content such as S, Si, Al in iron ore concentrate is also too high, and above-mentioned reason not only causes steelmaking furnace utilizationCoefficient is low, energy consumption is large, titanium resource waste, and amount of slag is large, environmental pollution is serious.
CN2011100879566 discloses " a kind of beneficiation method of ilmenite ", is by v-ti magnetite green oreThrough ore grinding, alkali soak pretreatment, filtration, magnetic separation obtains the method for ilmenite concentrate and iron ore concentrate after ore grinding again. The partyMethod is by iron content 32.16% with containing TiO212.11% v-ti magnetite green ore soaks pretreatment, mistake by ore grinding, alkaliFilter, magnetic separation processing after ore grinding again, formed iron content 59.30% iron ore concentrate and containing TiO220.15% ilmenite concentrate.Because the method is for ilmenite raw ore, raw ore SiO2、Al2O3, the gangue ore deposit such as CaO, MgOThing content is high, and the process that alkali soaks will preferentially occur in SiO2、Al2O3With it mineral, alkali soaks shape in processBecome the alkali similar to titanium to soak rear compound, the NaOH alkali number that alkali soaks the consumption of ferrotianium raw ore is that 469Kg/t is formerOre deposit, cost is high; And ferrotianium raw ore alkali soaks the titanium compound of rear formation, after soaking with gangue mineral alkali such as quartzThe compound of the silicon forming, it is very difficult wanting in follow-up magnetic separation, to realize effectively separation, this also makesApproximately ferrotianium raw ore alkali soak the raising of rear iron concentrate grade and ilmenite concentrate grade. Meanwhile, the method adopts twiceGrinding process changes 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, nothingMethod obtains 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 in physics and changeLearn on the basis of beneficiation method effective combination, provide a kind of cost low, reclaim quality and efficiency is high and operabilityGood utilization calcining, alkali soaks, classification and magnetic reconnection close and select v-ti magnetite concentrate method again, has realized vanadium titaniumIn magnetite concentrate, titanium, iron efficiently separate, and have improved and have entered stokehold iron grade, reduce and enter blast furnace TiO2、The content of the impurity such as S, Si, Al, improves the capacity factor of a blast furnace, reduces the discharge capacity of blast furnace slag, has reducedIronmaking cost, has improved TiO2Comprehensive utilization of resources rate has reduced NaOH or KOH consumption simultaneously, subtractsLack 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 of utilize that calcining, alkali soak, classification and magnetic reconnection close and select v-ti magnetite concentrate method again,It is characterized in that comprising the steps:
1) calcining
Be 50%～55%, TiO by TFe content range2Content range is 10%～15%, SiO2ContentBe 3%～6%, Al2O3Content is 3%～6%, S content > 0.5% v-ti magnetite concentrate 1:0.1 by weight～0.2 ratio adds CaO, at the temperature of 800 DEG C～1400 DEG C, calcines 20～60 minutes, formsCalcination 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 DEG C～370 DEG C, alkali soaks reaction 0.5～5 hour, and reactant is filtered, and obtains filtrate and alkaliLeaching cake B, described filtrate feeds recovery and processing system;
3) classification
By step 2) in alkali leaching cake B add water, form the ore pulp of mass concentration 20%～25% and feed cycloneCarry out classification, classification goes out sand setting C and overflow Y.
4) magnetic reconnection closes ore dressing
By step 3) in the sand setting C ore pulp of making mass concentration 30%～34% that adds water carry out magnetic separation, pointMust magnetic concentrate D and magnetic tailing E;
The ore pulp of making mass concentration 36%～41% that again magnetic tailing E added water carries out gravity treatment, must weigh respectivelyConcentrate selection F and gravity tailings G, described magnetic concentrate D is that TFe content range is 63%～68%Whole iron ore concentrate, gravity concentrate F and overflow Y merge into TiO2Content range is 50%～70% final titanium essenceOre deposit, gravity tailings G is SiO2Content range is 54%～60% true tailings.
Described aqueous slkali is appointing in NaOH or the KOH aqueous solution, NaOH and KOH mixed aqueous solutionMeaning is a kind of.
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 drum magnetic separator and the dehydration of 0.03T～0.05T magnetic force of 0.12T～0.15TGroove carries 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:
Method synthesis of the present invention uses that calcining, alkali soak, classification and magnetic reconnection close and select v-ti magnetite concentrate againMethod, has realized titanium in v-ti magnetite concentrate, iron efficiently separates; S content in isolated iron ore concentrate simultaneouslySignificantly reduce, by more than 0.50% being down to and being less than 0.10%, SiO2Content is down to below 3% by 3%～6%,Al2O3Content is down to below 3% by 3%～6%,, for subsequent smelting has been created better condition.
Calcination process utilizes CaO part to replace alkali to soak alkali lye consumption in process, has reduced follow-up alkali and has soaked in operationThe consumption 20%～30% of NaOH 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, shape to elements such as Ti, S, Si, Al in v-ti magnetite concentrateBecome corresponding salt. Different from v-ti magnetite concentrate, SiO in ilmenite raw ore2Content (> 20%)And Al2O3Content (> 7%) is far away higher than SiO in v-ti magnetite concentrate2Content (< 6%) and Al2O3ContainAmount (< 6%), soaks in ilmenite raw ore process at alkali, and the process of soaking due to alkali will preferentially occur in SiO2、Al2O3On mineral, make alkali soak v-ti magnetite concentrate and soak ferrotianium raw ore alkali consumption still less than alkali, better effects if.For example, after calcining, while soaking with NaOH alkali, the alkali number that the present invention consumes is less than 60kg/t concentrate, soaks than alkaliThe alkali number 469kg/t raw ore of raw ore consumption has reduced more than 7 times.
Cyclone is pressed granularity and the gravity grading of mineral, and alkali soaks the titanium compound of rear generation than the granularity of iron mineralCarefully, proportion is little, the difference of specific gravity of titanium, iron is larger, has realized effective separation of titanium, iron.
Add magnetic reconnection and close ore dressing, make iron concentrate grade bring up to 63%～68% by 50%～55%, withTime be less than 0.1%, SiO containing S amount in iron ore concentrate2And Al2O3Content is all less than 3%, TiO2Content is by 12%Be down to below 6%; Meanwhile, can also obtain TiO2Content is 50%～70% ilmenite concentrate. Adopt the partyMethod, has realized titanium, iron has effectively been separated, and reduces and enters blast furnace TiO2, the impurity such as S, Si, AlContent, improves the capacity factor of a blast furnace, reduces the discharge capacity of blast furnace slag, has reduced ironmaking cost, improves simultaneouslyTitanium resource comprehensive utilization ratio.
Brief description of the drawings
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.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further:
As shown in Figure 1.
Embodiment 1:
1) calcining
Be 53.2%, TiO by TFe content2Content is 12.9%, SiO2Content is 4.49%, Al2O3ContainAmount is 4.56%, the v-ti magnetite concentrate of S content 0.84%, and the ratio of 1:0.12 adds CaO by weight,At the temperature of 1350 DEG C, calcine 20 minutes, form calcination product A, its chemical equation is:
2) alkali soaks
By step 1) in calcination product A to be placed in mass concentration be 10% NaOH aqueous slkali, at 310 DEG CTemperature under alkali soak reaction 4.5 hours, reactant is filtered, obtain filtrate and alkali leaching cake B, NaOHConsumption 47kg/t is to ore deposit, and described filtrate feeds recovery and processing system, and its chemical equation is:
3) classification
By step 2) in alkali leaching cake B add water, form the ore pulp of mass concentration 20% and feed cyclone and carries outClassification, classification goes out sand setting C and overflow Y.
4) magnetic reconnection closes ore dressing
By step 3) in sand setting C add water that to feed field intensity be 0.13T cartridge type for the ore pulp of making mass concentration 30%Magnetic separator carries out magnetic separation, obtains magnetic concentrate D and magnetic tailing E;
The ore pulp of making mass concentration 36% that again magnetic tailing E added water carries out gravity treatment, respectively gravity concentrateF and gravity tailings G, described magnetic concentrate D is that TFe content is 64.9% final iron ore concentrate (SiO2ContainAmount is 0.56%, Al2O3Content is 1.38%, S content is 0.02%), gravity concentrate F and overflow Y closeAnd be TiO2Content is 52.0% final ilmenite concentrate, and gravity tailings G is SiO2Content be 54.9% finalMine tailing.
Embodiment 2:
1) calcining
Be 51.9%, TiO by TFe content2Content is 12.1%, SiO2Content is 4.55%, Al2O3ContainAmount is 4.67%, the v-ti magnetite concentrate of S content 0.75%, and the ratio of 1:0.13 adds CaO by weight,At the temperature of 1300 DEG C, calcine 25 minutes, form calcination product A, the same embodiment of its chemical equation1。
2) alkali soaks
By step 1) in calcination product A to be placed in mass concentration be 15% NaOH aqueous slkali, at 320 DEG CTemperature under alkali soak reaction 3.5 hours, reactant is filtered, obtain filtrate and alkali leaching cake B, NaOHConsumption 46.5kg/t is to ore deposit, and described filtrate feeds recovery and processing system, the same embodiment of its chemical equation1。
3) classification
By step 2) in alkali leaching cake B add water, form the ore pulp of mass concentration 21% and feed cyclone and carries outClassification, classification goes out sand setting C and overflow Y.
4) magnetic reconnection closes ore dressing
By step 3) in sand setting C add water that to feed field intensity be 0.13T cartridge type for the ore pulp of making mass concentration 31%Magnetic separator carries out magnetic separation, obtains magnetic concentrate D and magnetic tailing E;
The ore pulp of making mass concentration 37% that again magnetic tailing E added water carries out gravity treatment, respectively gravity concentrateF and gravity tailings G, described magnetic concentrate D is that TFe content is 65.6% final iron ore concentrate (SiO2ContainAmount is 0.42%, Al2O3Content is 1.46%, S content is 0.01%), gravity concentrate F and overflow Y closeAnd be TiO2Content is 53.5% final ilmenite concentrate, and gravity tailings G is SiO2Content be 55.3% finalMine tailing.
Embodiment 3:
1) calcining
Be 51.6%, TiO by TFe content2Content is 14.0%, SiO2Content is 4.25%, Al2O3ContainAmount is 4.27%, the v-ti magnetite concentrate of S content 0.64%, and the ratio of 1:0.13 adds CaO by weight,At the temperature of 1200 DEG C, calcine 35 minutes, form calcination product A, the same embodiment of its chemical equation1。
2) alkali soaks
By step 1) in calcination product A to be placed in mass concentration be 21% NaOH aqueous slkali, at 330 DEG CTemperature under alkali soak reaction 3.0 hours, reactant is filtered, obtain filtrate and alkali leaching cake B, NaOHConsumption 47.2kg/t is to ore deposit, and described filtrate feeds recovery and processing system, the same embodiment of its chemical equation1。
3) classification
By step 2) in alkali leaching cake B add water, form the ore pulp of mass concentration 22% and feed cyclone and carries outClassification, classification goes out sand setting C and overflow Y.
4) magnetic reconnection closes ore dressing
By step 3) in sand setting C add water that to feed field intensity be 0.03T magnetic force for the ore pulp of making mass concentration 31%Drench pit carries out magnetic separation, obtains magnetic concentrate D and magnetic tailing E;
The ore pulp of making mass concentration 38% that again magnetic tailing E added water carries out gravity treatment, respectively gravity concentrateF and gravity tailings G, described magnetic concentrate D is that TFe content is 66.2% final iron ore concentrate (SiO2ContainAmount is 0.33%, Al2O3Content is 1.38%, S content is 0.01%), gravity concentrate F and overflow Y closeAnd be TiO2Content is 62.3% final ilmenite concentrate, and gravity tailings G is SiO2Content be 56.1% finalMine tailing.
Embodiment 4:
1) calcining
Be 53.6%, TiO by TFe content2Content is 12.4%, SiO2Content is 5.08%, Al2O3ContainAmount is 4.55%, the v-ti magnetite concentrate of S content 0.67%, and the ratio of 1:0.14 adds CaO by weight,At the temperature of 1100 DEG C, calcine 40 minutes, form calcination product A, the same embodiment of its chemical equation1。
2) alkali soaks
By step 1) in calcination product A to be placed in mass concentration be 30% NaOH aqueous slkali, at 350 DEG CTemperature under alkali soak reaction 2.0 hours, reactant is filtered, obtain filtrate and alkali leaching cake B, NaOHConsumption 45.5kg/t is to ore deposit, and described filtrate feeds recovery and processing system, and its chemical equation is with embodiment 1.
3) classification
By step 2) in alkali leaching cake B add water, form the ore pulp of mass concentration 23% and feed cyclone and carries outClassification, classification goes out sand setting C and overflow Y.
4) magnetic reconnection closes ore dressing
By step 3) in sand setting C add water that to feed field intensity be 0.05T magnetic force for the ore pulp of making mass concentration 32%Drench pit carries out magnetic separation, obtains magnetic concentrate D and magnetic tailing E;
The ore pulp of making mass concentration 39% that again magnetic tailing E added water carries out gravity treatment, respectively gravity concentrateF and gravity tailings G, described magnetic concentrate D is that TFe content is 67.2% final iron ore concentrate (SiO2ContainAmount is 0.38%, Al2O3Content is 1.21%, S content is 0.01%), gravity concentrate F and overflow Y closeAnd be TiO2Content is 63.9% final ilmenite concentrate, and gravity tailings G is SiO2Content be 56.2% finalMine tailing.
Embodiment 5:
1) calcining
Be 53.2%, TiO by TFe content2Content is 11.5%, SiO2Content is 4.21%, Al2O3ContentBe 5.02%, the v-ti magnetite concentrate of S content 0.91%, the ratio of 1:0.15 adds CaO by weight,At the temperature of 1000 DEG C, calcine 45 minutes, form calcination product A, its chemical equation is with embodiment 1.
2) alkali soaks
By step 1) in calcination product A to be placed in mass concentration be 40% KOH aqueous slkali, at 320 DEG CTemperature under alkali soak reaction 2.0 hours, reactant is filtered, obtain filtrate and alkali leaching cake B, KOHConsumption 44kg/t is to ore deposit, and described filtrate feeds recovery and processing system, and its chemical equation is:
3) classification
By step 2) in alkali leaching cake B add water, form the ore pulp of mass concentration 24% and feed cyclone and carries outClassification, classification goes out sand setting C and overflow Y.
4) magnetic reconnection closes ore dressing
By step 3) in sand setting C add water that to feed field intensity be 0.05T magnetic force for the ore pulp of making mass concentration 33%Drench pit carries out magnetic separation, obtains magnetic concentrate D and magnetic tailing E;
The ore pulp of making mass concentration 39% that again magnetic tailing E added water carries out gravity treatment, respectively gravity concentrateF and gravity tailings G, described magnetic concentrate D is that TFe content is 67.6% final iron ore concentrate (SiO2ContainAmount is 0.35%, Al2O3Content is 1.30%, S content is 0.01%), gravity concentrate F and overflow Y closeAnd be TiO2Content is 65.8% final ilmenite concentrate, and gravity tailings G is SiO2Content be 57.0% finalMine tailing.
Embodiment 6:
As shown in Figure 2.
1) calcining
Be 53.9%, TiO by TFe content2Content is 12.1%, SiO2Content is 3.66%, Al2O3ContentBe 4.20%, the v-ti magnetite concentrate of S content 0.69%, the ratio of 1:0.17 adds CaO by weight,At the temperature of 900 DEG C, calcine 50 minutes, form calcination product A, its chemical equation is with embodiment 1.
2) alkali soaks
By step 1) in calcination product A to be placed in mass concentration be 50% KOH aqueous slkali, at 310 DEG CTemperature under alkali soak reaction 2.5 hours, reactant is filtered, obtain filtrate and alkali leaching cake B, KOHConsumption 52kg/t is to ore deposit, and described filtrate feeds recovery and processing system, and its chemical equation is:
3) classification
By step 2) in alkali leaching cake B add water, form the ore pulp of mass concentration 25% and feed cyclone and carries outClassification, classification goes out sand setting C and overflow Y.
4) magnetic reconnection closes ore dressing
By step 3) in sand setting C add water that to feed field intensity be 0.05T magnetic force for the ore pulp of making mass concentration 32%Drench pit carries out magnetic separation, obtains a stages of magnetic separation concentrate D1 and a stages of magnetic separation mine tailing E1; By a stages of magnetic separation concentrateIt is that 0.13T drum magnetic separator carries out two stages of magnetic separation that D1 feeds field intensity, obtains two stages of magnetic separation concentrate D2 and two sectionsMagnetic tailing E2; Two stages of magnetic separation mine tailing E1 and E2 are merged to the ore pulp of making mass concentration 40% that adds water to carry outGravity treatment, obtains respectively gravity concentrate F and gravity tailings G, and two described stages of magnetic separation concentrate D2 are TFe contentBe 67.5% final iron ore concentrate (SiO2Content is 0.32%, Al2O3Content is 1.41%, S content is0.01%), gravity concentrate F and overflow Y merge into TiO2Content is 68.4% final ilmenite concentrate, gravity treatment tailOre deposit G is SiO2Content is 58.6% true tailings.
Embodiment 7:
As shown in Figure 2.
1) calcining
Be 54.9%, TiO by TFe content2Content is 11.3%, SiO2Content is 3.54%, Al2O3ContentBe 4.52%, the v-ti magnetite concentrate of S content 0.62%, the ratio of 1:0.2 adds CaO by weight, 850DEG C temperature under calcine 60 minutes, form calcination product A, its chemical equation is with embodiment 1.
2) alkali soaks
By step 1) in calcination product A be placed in that NaOH mass concentration is 25%, KOH mass concentration isIn 10% aqueous slkali, at the temperature of 320 DEG C, alkali soaks reaction 2.0 hours, reactant is filtered,Filtrate and alkali leaching cake B, NaOH consumption 36kg/t is to ore deposit, and KOH consumption 46kg/t is to ore deposit, described inFiltrate feed recovery and processing system, its chemical equation is with embodiment 1 and embodiment 5.
3) classification
By step 2) in alkali leaching cake B add water, form the ore pulp of mass concentration 25% and feed cyclone and carries outClassification, classification goes out sand setting C and overflow Y.
4) magnetic reconnection closes ore dressing
By step 3) in sand setting C add water that to feed field intensity be 0.05T magnetic force for the ore pulp of making mass concentration 31%Drench pit carries out magnetic separation, obtains a stages of magnetic separation concentrate D1 and a stages of magnetic separation mine tailing E1; By a stages of magnetic separation concentrateIt is that 0.13T drum magnetic separator carries out two stages of magnetic separation that D1 feeds field intensity, obtains two stages of magnetic separation concentrate D2 and two sectionsMagnetic tailing E2; Two stages of magnetic separation mine tailing E1 and E2 are merged to the ore pulp of making mass concentration 41% that adds water to carry outGravity treatment, obtains respectively gravity concentrate F and gravity tailings G, and two described stages of magnetic separation concentrate D2 are TFe contentBe 67.2% final iron ore concentrate (SiO2Content is 0.35%, Al2O3Content is 1.30%, S content is0.01%), gravity concentrate F and overflow Y merge into TiO2Content is 67.9% final ilmenite concentrate, gravity treatment tailOre deposit G is SiO2Content is 58.2% true tailings.
Claims (5)
1. utilize calcining, alkali soaks, classification and magnetic reconnection close and select a v-ti magnetite concentrate method again, it is characterized in that comprising the steps:
1) calcining
Be 50%～55%, TiO by TFe content range2Content range is 10%～15%, SiO2Content is 3%～6%, Al2O3Content is 3%～6%, S content > 0.5% v-ti magnetite concentrate by weight the ratio of 1:0.1～0.2 add CaO, at the temperature of 800 DEG C～1400 DEG C, 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 DEG C～370 DEG C, alkali soaks reaction 0.5～5 hour, described aqueous slkali is any one in NaOH or the KOH aqueous solution, NaOH and KOH mixed aqueous solution, reactant is filtered, obtain filtrate and alkali leaching cake B, described filtrate feeds recovery and processing system;
3) classification
By step 2) in alkali leaching cake B add water, form the ore pulp of mass concentration 20%～25% and feed cyclone and carry out classification, classification goes out sand setting C and overflow Y;
4) magnetic reconnection closes ore dressing
By step 3) in the sand setting C ore pulp of making mass concentration 30%～34% that adds water carry out magnetic separation, respectively magnetic concentrate D and magnetic tailing E;
The ore pulp of making mass concentration 36%～41% that again magnetic tailing E added water carries 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 Y merge into TiO2Content range is 50%～70% final ilmenite concentrate, and gravity tailings G is SiO2Content range is 54%～60% true tailings.
2. utilization calcining according to claim 1, alkali soak, classification and magnetic reconnection close and select v-ti magnetite concentrate method again, it is characterized in that described magnetic separation adopts the drum magnetic separator of 0.12T～0.15T to carry out magnetic separation.
3. utilization calcining according to claim 1, alkali soak, classification and magnetic reconnection close and select v-ti magnetite concentrate method again, it is characterized in that described magnetic separation adopts the magnetic dewater cone of 0.03T～0.05T to carry out magnetic separation.
4. utilization calcining according to claim 1, alkali soak, classification and magnetic reconnection close and select v-ti magnetite concentrate method again, 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.
5. utilization calcining according to claim 1, alkali soak, classification and magnetic reconnection close and select v-ti magnetite concentrate method again, 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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| CN104888938A (en) * | 2015-06-12 | 2015-09-09 | 鞍钢集团矿业公司 | Vanadium-titanium magnetite concentrate method by using calcinations, oxidation by alkaline leaching, grading and magnetic gravitational reselection |
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