CN102242251B - Alkaline V-Ti pellet and preparation method thereof - Google Patents
Alkaline V-Ti pellet and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a method for preparing an alkaline V-Ti pellet by using high-Ti-type V-Ti magnetite concentrate. The method comprises the steps of batching, mixing, drying, damp milling, pelletizing, drying, preheating, roasting, cooling, sieving and the like. According to the preparation method, a pelletizing raw material is mainly based on V-Ti magnetite concentrate, partial common concentrate is added, and a slaked lime alkaline flux is added, so that the finished pellet is prepared by roasting. By using the preparation method, the V-Ti magnetite concentrate with the common concentrate and the alkaline flux is used in any proportion so as to produce alkaline pellet with an alkalinity of 0.4-1.0, thereby achieving the purpose of transferring alkaline agglomerate to the pellet; and then pelletizing and roasting are carried out, so as to obtain the V-Ti pellet, wherein the compression strength per V-Ti pellet is larger than 2500N, thus the adaptability and smelting property of the raw materials are improved.
Description
Technical field
The invention belongs to metallurgical technology field, relate in particular to a kind of alkaline V-Ti pellet and adopt high-Ti type V-Ti magnetite concentrate with addition of not containing TiO
2Common iron ore concentrate, and add the method that the slaked lime basic flux prepares alkaline V-Ti pellet.
Background technology
Pellet has good physical strength and metallurgical performance, has become a kind of important high-quality furnace refractory.Using more general burden structure at present is " high basicity sinter+acidic oxidation pellet ".Commerical test shows, along with the increase of pellet ratio, and the corresponding 2.4-2.5 that brings up to of the basicity of agglomerate.SINTERING PRODUCTION shows, when sintering basicity surpasses 2.4, and the refinement of agglomerate finished product grade, the intensity variation is larger on the blast-furnace smelting impact.Therefore, the basicity of pellet is required and should strictly limit, can not increase substantially sinter basicity and come balance blast furnace slag basicity.Influential to quality in view of ultra-high basicity vanadium titanium agglomerate, be necessary agglomerate part basicity is shifted to pellet, produce Basic Pellets.
Japan is the country that early start is produced the fluxed pellets ore deposit, but it is to add the fine of CaO or MgO in iron ore concentrate before pelletizing, and basicity is controlled between 0.4-1.2, and pelletizing reductibility and reduction swellability performance are improved.
Patent documentation CN200510032097.5 discloses a kind of method that v-ti magnetite concentrate prepares acidic pellet ore, and the method adopts vanadium ilmenite concentrate+common concentrate, then adds the binding agent wilkinite and prepare acid pellet.But the limitation of the method is also obvious, and the wilkinite that namely increases can only be produced acid pellet.Must produce Alkalinous pelletizing for the part basicity of agglomerate is transferred to pellet, therefore, application the method prepares Alkalinous pelletizing or just there is obvious limitation in vanadium-titanium ore pellets.
Summary of the invention
The objective of the invention is in order to overcome existing above-mentioned technical problem in existing vanadium-titanium pellet and preparation, and provide a kind of v-ti magnetite concentrate with addition of common iron ore concentrate, and adding the formulated alkaline V-Ti pellet of slaked lime basic flux, the present invention adopts following two kinds of technical schemes to complete its task.
Alkaline V-Ti pellet of the present invention is comprised of following in % by weight: select v-ti magnetite concentrate 1-99%, common concentrate 1-99% adds slaked lime 0.8-3.2%, and pellet basicity is 0.4-1.0; Wherein common concentrate is not for containing TiO
2Iron ore concentrate.
Alkaline V-Ti pellet preparation method's of the present invention characteristics are, adopt v-ti magnetite concentrate, the 1-99% of 1-99% common concentrate, add the slaked lime of 0.8-3.2%, and adopt following steps to prepare alkaline V-Ti pellet: A, batching, mixing, drying; B, profit mill; C, pelletizing; D, drying, preheating, roasting; E, cooling, screening; Wherein common concentrate is not for containing TiO
2Iron ore concentrate.Its preparation process is as follows:
A, batching, mixing, drying: adopt v-ti magnetite concentrate, the 1-99% of 1-99% common concentrate, add the slaked lime of 0.8-3.2%, mix and dry, wherein, be dried to mixture moisture and be down to 6-8%, pellet basicity is 0.4-1.0;
B, profit mill: the compound profit of A step is milled to＜200 order grain size contents reach 70-90%;
C, pelletizing: the pelletizing process adds suitable quantity of water, and the green-ball moisture controlled is at 8-10.5%, pelletizing time 10-30min, green-ball granularity 10-25mm;
D, drying, preheating, roasting: drying temperature 200-300 ℃; Preheating temperature 800-1000 ℃, preheating 10-25min; Maturing temperature is 1100-1300 ℃, roasting time 25-40min;
E, cooling, screening: agglomerates is carried out cooling, screening obtain the finished ball nodulizing that granularity is 9-18mm.
The component content of v-ti magnetite concentrate of the present invention is counted with % by weight: Fe
2O
3: 40-50%, FeO 29-33%, SiO
22.5-4.5%, CaO 1.5-2.2%, MgO 2.0-3.2%, Al
2O
33.0-4.5%, V
2O
50.5-0.65%, TiO
210-15%, S :≤0.6%, P≤0.003%; Wherein TFe52-56% is Fe in ore
2O
3Total amount with the ferro element of FeO.
The TiO of the present invention's alkalescence vanadium titanium finished ball nodulizing
2Content is 6.5-9.0%, the preferred 0.4-0.6 of pellet basicity, and the ultimate compression strength of pellet is greater than 2500N/.
Use the alkaline V-Ti pellet of the present invention's preparation, the wide accommodation of raw material, particularly solve v-ti magnetite concentrate and made the large problem of pellet difficulty, alkaline V-Ti pellet of the present invention can be satisfied with fully for blast-furnace smelting, guarantees that the technico-economical comparisones such as its utilization coefficient, coke ratio all are improved.
Embodiment
Below with reference to design philosophy of the present invention, specific embodiment and comparative example, the good result that elaborates preparation method of the present invention and produce.
Alkaline V-Ti pellet preparation method of the present invention comprises the following steps: batching, mixing, drying, profit mill, pelletizing, drying, preheating, roasting, cooling, screening; Can carry out blast-furnace smelting after screening.
Pellet raw material of the present invention is take v-ti magnetite concentrate that Flos Bombacis Malabarici is produced as main, adopt the common concentrate of v-ti magnetite concentrate, the 1-99% of 1-99%, again with addition of the slaked lime basic flux of 0.8-3.2% etc. carry out pelletizing, roasting prepares the finished product pellet.The component content of v-ti magnetite concentrate is counted with % by weight: Fe
2O
3: 40-50%, FeO 29-33%, SiO
22.5-4.5%, CaO 1.5-2.2%, MgO 2.0-3.2%, Al
2O
33.0-4.5%, V
2O
50.5-0.65%, TiO
210-15%, S :≤0.6%, P≤0.003%; Wherein TFe52-56% is Fe in ore
2O
3Total amount with the ferro element of FeO.
Due to Flos Bombacis Malabarici v-ti magnetite concentrate TiO
2With Al
2O
3Content is high, and its fusing point is up to more than 1350 ℃, and the amount of liquid phase of generation is few, lacks 10-20% than common ore deposit sintering amount of liquid phase, and this kind granularity of concentrate is thick, and＜200 purpose grain size contents only have 50% left and right, and balling property is poor, cause mixture ventilation poor, vertical sintering speed is slow, and Sintering Operation Index is low.(act as a fuel to improve sintering temperature because add coke powder or hard coal in sintering under reducing atmosphere, supervene reducing atmosphere when improving sintering temperature) sintering temperature is during lower than 1300 ℃, can produce the sintered material infusibility, amount of liquid phase is few, the consequence of sinter strength and yield rate degradation.Therefore, in order to overcome the defective of v-ti magnetite concentrate on sintering, making pellet with v-ti magnetite concentrate will be the another kind of important approach that utilizes, and can produce the quality pellets ore deposit of satisfying blast-furnace smelting, and its metallurgical performance is better than agglomerate.
[1] basicity.Pellet basicity is natural alkalinity (not with addition of any basic flux) substantially in the world at present, and the slaked lime that the present invention adds 0.8-3.2% is as basic flux production mixing ore deposit pelletizing, with pellet basicity (CaO/SiO
2) be controlled within 0.4-1.0 and all can produce qualified vanadium-titanium pellet.
[2] the present invention can prepare burden and pelletizing with addition of the common iron ore concentrate of arbitrary proportion with the v-ti magnetite concentrate of arbitrary proportion, and then roasting, obtains alkaline V-Ti pellet.
[3] the v-ti magnetite concentrate batching adopts the disk proportioning machine, and slaked lime adopts screw feeder+star-shaped feeding machine batching, but is not limited only to this two kinds of equipment.
[4] the preparation pelletizing need to adopt binding agent.Binding agent of the present invention is to use slaked lime, and slaked lime is that basic flux can improve basicity, is again binding agent, improves the adhesive property of concentrate.In preparation process, add the slaked lime basic flux of 0.8-3.2%: preferably use proportioning to be 0.8-2.5%, with the adhesiveproperties that improves v-ti magnetite concentrate and the alkalescence of regulating vanadium-titanium pellet.
[5] the said ratio raw material is mixed-drying.The moisture of compound fluctuates in the 9-13.5% scope, enters mixing machine after preparing burden and mixes-drying, and dry required thermal source is the heat that blast furnace gas+the coke-oven gas burning produces, and mixture moisture is down to 6-8%.
[6] above-mentioned compound is implemented the profit grinding process.V-ti magnetite concentrate＜200 order grain size contents generally only have 40-60%, and the granularity of making pellet generally needs 80-90%, therefore compound is through after dry mixed, enter damp mill, carry out ore grinding, increase fine fraction content, after ore grinding＜200 order grain size contents can reach 70-90%, can satisfy the pelletizing needs.Grinding procedure adopts damp mill.The Flos Bombacis Malabarici v-ti magnetite concentrate is produced part higher-grade v-ti magnetite concentrate, its granularity is thinner, for example the v-ti magnetite concentrate of 56% iron grade＜200 order grades can reach more than 80%, just do not need the profit mill with this concentrate pelletizing, also can cancel profit grinder order on flow process.
[7] pelletizing system.Balling equipment adopts balling disc.After compound moistens mill by mixing, pelletizing in balling disc, the pelletizing process adds water in right amount, before pelletizing, profit grinder order mixture moisture 6-8% is advisable, and the green-ball moisture controlled is at 8-10.5%, and preferably adequate moisture 9.0%, the pelletizing time is 10-30min, green-ball granularity 10-25mm.
[8] drying-preheating-roasting system.Through the green-ball after mixed pelletizing, through super-dry-preheating-roasting series reaction and processing, green-ball is fixed through high temperature oxidation, obtains finished ball.200-300 ℃ of its drying temperature, preheating temperature are 800-1000 ℃, and be 10-25min warm up time, and maturing temperature is 1100-1300 ℃, and roasting time is 25-40min.
This process can adopt grate kiln, also can adopt shaft furnace, must not make sweeping generalizations.
[9] the roasting ball is carried out cooling, screening and the finished ball that obtains having certain ultimate compression strength and metallurgical performance and granularity, finished ball granularity 9-18mm is more than mean compressive strength 2500N/ is individual.
Embodiment 1
At first prepared alkaline vanadium titanium globe in the laboratory, for comparative analysis, having prepared simultaneously the interpolation wilkinite is the acid pellet of binding agent.
Table 1 material chemical component/%
| Material name | TFe | Fe 2O 3 | FeO | SiO 2 | CaO | MgO | Al 2O 3 | S | P | Scaling loss |
| Common concentrate | 63.25 | 61.38 | 26.12 | 5.47 | 1.23 | 0.90 | 1.00 | 0.324 | 0.035 | -0.90 |
| V-ti magnetite concentrate | 55.56 | 46.39 | 29.72 | 3.35 | 1.92 | 2.56 | 3.31 | 0.341 | 0.007 | -1.5 |
| Unslaked lime | 88.00 | 1.00 | 0.5 | 0.4 | 0.008 | 0.011 | 10 |
V in v-ti magnetite concentrate
2O
50.65%, TiO
211.16%.
Table 2 wilkinite physicochemical property and chemical composition
Table 3 raw material granularity forms
Test raw material is mainly v-ti magnetite concentrate, common iron ore concentrate, unslaked lime and wilkinite.The test desired raw material is taken from different production scenes: v-ti magnetite concentrate, common iron ore concentrate and wilkinite are all taken from and are climbed pelletizing plant of steel enterprise-like corporation, and unslaked lime is from climbing steel iron work sintering mill (plant).Various material chemical components see Table 1, and the wilkinite physical and chemical index sees Table 2, and vanadium ilmenite concentrate and common granularity of concentrate composition see Table 3.Join the ore deposit scheme and see Table 4.
Table 4 proportion scheme (%)
| Join the ore deposit structure | Batch | Basicity | The vanadium ilmenite concentrate | Common concentrate | Slaked lime | Wilkinite |
| Vanadium ilmenite concentrate+common concentrate | JH | 0.15 | 70 | 30 | 1.80 | |
| Vanadium ilmenite concentrate+common concentrate | Hx4 | 0.4 | 70 | 30 | 0.80 | |
| Vanadium ilmenite concentrate+common concentrate | Hx6 | 0.6 | 70 | 30 | 1.60 | |
| Vanadium ilmenite concentrate+common concentrate | Hx8 | 0.8 | 70 | 30 | 2.50 |
The amount of allocating into of slaked lime is by unslaked lime, and Hx4 in numbering, Hx6, Hx8 represent that basicity is 0.4,0.6,0.8.
Table 5 roasting system
Get iron-bearing material 5kg according to the experiment mix proportion scheme, adopt the outer flux (unslaked lime adds after adding water digestion fully) of joining, after artificial mixing, be that 23r/min, inclination angle are to carry out pelletizing in 46 balling disc at Φ 800 * 165mm (limit is high), rotating speed, adopt in the pelletizing process manually to add water, the pelletizing time is 30min.Pelletizing gained green-ball carries out roasting by roasting system (table 5) after drying under the environment of 110 ℃ of left and right, and the pelletizing after roasting is carried out the mensuration of ultimate compression strength and reduction swellability coefficient etc.
Test item: (1) pelletizing crushing strength.(2) Swelling of Pellets During Reduction coefficient:＜900 ℃ of logical N
2Protection, the 900 o'clock logical protection of continuation N
2Half hour, close subsequently N
2, pass into reducing gas, reduced 1 hour, reducing gas flow: 15L/min.(3) metallurgical performance: the reducing gas that low-temperature reduction disintegration can be measured consists of CO30%+N
270%, get less than the weight percentage of 3.15mm grade and make cryogenic reducting powder index (RDI
-315); Middle temperature reducing property is measured and is undertaken by GB13244-91, and reducing gas consists of CO30%+N
270%, the reduction degree when getting 180min is reductibility index (RI).(4) the main phase of pellet and content thereof: detect pelletizing mineral composition and form pattern, mineral structure etc.(5) composite burner material property energy: sample and coke size are 10-12.5mm, the reducing gas flow: reducing gas composition: 30%CO+70%N
2Heat-up rate: during room temperature to 900 ℃, be 10 ℃/min; In the time of 900-1000 ℃, be 3 ℃/min; When temperature＞1000 ℃, be 6 ℃/min; Sample is logical N before 900 ℃
2Protection heats up, and passes into the reducing gas reduction after 900 ℃; Loading: 35kg.
The laboratory test performance
1, under different roasting system conditions, the ultimate compression strength/N/ of different basicity pelletizings is individual
The most important technical indicator of finished ball nodulizing is ultimate compression strength, and it is qualified to be considered as according to actual ultimate compression strength 2500N/ of production.Maturing temperature is controlled at more than 1230 ℃, and the finished ball nodulizing of basicity 0.6 is more with practical value.Table 6 is the feasible parameters combination of different basicity pelletizing ultimate compression strength.As can be seen from Table 6, the experiment that the present invention carries out in different basicity scopes under different roasting system conditions, its ultimate compression strength has all surpassed 3000N/, the experiment effect highly significant.
The feasible parameters combination of the different basicity pelletizing of table 6 ultimate compression strength
2, pelletizing metallurgical performance
The experiment pelletizing is carried out metallurgical performance detect, after adding certain alkaline material, the pelletizing coefficient of expansion, low temperature reduction degradation index and middle temperature reduction degree compare with benchmark that all great changes have taken place.See Table 7,8,9.
(1) low temperature reduction degradation index
Table 7 pellet low temperature reduction degradation index (%)
Along with the raising of basicity, the pelletizing low temperature reduction degradation index rises.But which kind of pelletizing no matter, its low temperature reduction degradation index all far below the low temperature reduction degradation index (20-30%) of vanadium titanium agglomerate, that is to say, pelletizing reduction and pulverization ratio performance can not have influence on the normal smelting of blast furnace.
(2) warm reduction degree in
Warm reduction degree (%) in table 8 pellet
Along with the raising of basicity, in pellet, warm reduction degree rises, and after adding alkaline material, in pelletizing, warm reduction degree all is better than the benchmark pelletizing.
(3) reduction swellability coefficient
After the interpolation alkaline material, reduction swellability coefficient and the basicity relation of pelletizing see Table 9.Wherein the reduction swellability coefficient of JH is 8.25%.
Table 9 pellet ore reduction swellability index/%
Mixing ore deposit Swelling of Pellets During Reduction coefficient descends with the basicity raising.Rise with basicity, the silicate phase increase is conducive to alleviate reduction swellability.This shows, mix the optimum alkalinity of pellet at 0.4-0.6.
Embodiment 2
The present embodiment is the alkaline V-Ti pellet of actual industrial production.The v-ti magnetite concentrate that uses and common iron ore concentrate composition see Table 10.
Table 10 material composition (%)
| Material name | TFe | Fe 2O 3 | FeO | SiO 2 | CaO | MgO | Al 2O 3 | V 2O 5 | TiO 2 | S | P |
| The vanadium ilmenite concentrate | 56.79 | 48.9 | 29.0 | 3.01 | 2.05 | 2.32 | 3.21 | 0.65 | 10.5 | 0.42 | 0.002 |
| Common concentrate | 63.25 | 61.38 | 26.12 | 5.47 | 1.23 | 0.90 | 1.00 | 0.324 | 0.035 |
Main equipment is grate kiln, produces qualified pellet through operations such as batching, mixing, pelletizing, preheating-roastings.
A, with the component content raw material of above-mentioned table 10, with 0.85% add that slaked lime mixes and dry, dry pack moisture to 7.0%, detecting its natural alkalinity is 0.42;
Compound to＜200 order grain size contents of B, profit mill A step reach 85%;
C, add the suitable quantity of water pelletizing, 9%, the pelletizing time is 20min with the green-ball moisture controlled, makes the green-ball granularity be controlled at 10-25mm;
D, green-ball is carried out drying, drying temperature adopts 300 ℃, adopts 900 ℃ of preheating temperature 20min before roasting, then green-ball is carried out roasting, 1250 ℃ of maturing temperatures, roasting time 30min;
E, carry out cooling to agglomerates at last and the screening, obtaining granularity is the alkaline V-Ti-magnetite finished pellet of 9-18mm, after testing, the tumbler index of this pelletizing is 90.03%, ultimate compression strength is 2760N/, and wear-resistant index 5.91%, blast furnace use the pelletizing smelting of the present embodiment normally to carry out.
Embodiment 3
The present embodiment sees Table 11 at v-ti magnetite concentrate and the common iron ore concentrate composition of producing the full vanadium-titanium pellet use of alkalescence.
Table 11 material composition (%)
| Material name | TFe | Fe 2O 3 | FeO | SiO 2 | CaO | MgO | Al 2O 3 | V 2O 5 | TiO 2 | S | P |
| The vanadium ilmenite concentrate | 56.79 | 48.9 | 29.0 | 3.01 | 2.05 | 2.32 | 3.21 | 0.65 | 10.5 | 0.42 | 0.002 |
| Common concentrate | 63.25 | 61.38 | 26.12 | 5.47 | 1.23 | 0.90 | 1.00 | 0.39 | 0.035 |
Main equipment is grate kiln, produces qualified pellet through operations such as batching, mixing, pelletizing, preheating-roastings.
A, with the component content raw material of above-mentioned table 13, with 1.7% add that slaked lime mixes and dry, dry pack moisture to 7.0%, detecting its natural alkalinity is 0.65;
Compound to＜200 order grain size contents of B, profit mill A step reach 85%;
C, add the suitable quantity of water pelletizing, 9%, the pelletizing time is 20min with the green-ball moisture controlled, makes the green-ball granularity be controlled at 10-25mm;
D, green-ball is carried out drying, drying temperature adopts 300 ℃, adopts 900 ℃ of preheating temperature 20min before roasting, then green-ball is carried out roasting, 1250 ℃ of maturing temperatures, roasting time 30min;
E, carry out cooling to agglomerates at last and the screening, obtaining granularity is the alkaline schreyerite finished pellet of 9-18mm, after testing, the tumbler index of this pelletizing is 91.23%, ultimate compression strength is 2880N/, and wear-resistant index 5.62%, blast furnace use the pelletizing smelting of the present embodiment normally to carry out.
Embodiment 4
The v-ti magnetite concentrate that the present embodiment uses and common iron ore concentrate composition see Table 12.
Table 12 material composition (%)
| Material name | TFe | Fe 2O 3 | FeO | SiO 2 | CaO | MgO | Al 2O 3 | V 2O 5 | TiO 2 | S | P |
| The vanadium ilmenite concentrate | 56.79 | 48.9 | 29.0 | 3.01 | 2.05 | 2.32 | 3.21 | 0.65 | 10.5 | 0.42 | 0.002 |
| Common concentrate | 63.25 | 61.38 | 26.12 | 5.47 | 1.23 | 0.90 | 1.00 | 0.39 | 0.035 |
Main equipment is grate kiln, produces qualified pellet through operations such as batching, mixing, pelletizing, preheating-roastings.
A, with the component content raw material of above-mentioned table 12, with 2.5% add that slaked lime mixes and dry, dry pack moisture to 7.0%, detecting its natural alkalinity is 0.81;
Compound to＜200 order grain size contents of B, profit mill A step reach 85%;
C, add the suitable quantity of water pelletizing, 9.0%, the pelletizing time is 20min with the green-ball moisture controlled, makes the green-ball granularity be controlled at 10-25mm;
D, green-ball is carried out drying, drying temperature adopts 300 ℃, adopts 900 ℃ of preheating temperature 20min before roasting, then green-ball is carried out roasting, 1250 ℃ of maturing temperatures, roasting time 30min;
E, carry out cooling to agglomerates at last and the screening, obtaining granularity is the alkaline schreyerite finished pellet of 9-18mm, after testing, the tumbler index of this pelletizing is 89.91%, ultimate compression strength is 2715N/, and it is normal that wear-resistant index 5.96%, blast furnace use the pelletizing of the present embodiment to smelt.
Claims (2)
1. the preparation method of an alkaline V-Ti pellet, it is characterized in that, pellet by v-ti magnetite concentrate with addition of common concentrate, add the slaked lime basic flux formulated, count with % by weight: v-ti magnetite concentrate 1-99%, common concentrate 1-99% adds slaked lime 0.8-3.2%, wherein, common concentrate is not for containing TiO
2Iron ore concentrate; The basicity of described vanadium-titanium pellet is 0.4-1.0, TiO
2Content is 6.5-9.0%, and ultimate compression strength is greater than 2500N/, and the preparation of employing following steps:
A, batching, mixing, drying: with v-ti magnetite concentrate, common concentrate, add slaked lime and prepare burden, mix and dry, wherein, be dried to mixture moisture and be down to 6-8%; Wherein, the v-ti magnetite concentrate batching adopts the disk proportioning machine, and slaked lime adopts screw feeder+star-shaped feeding machine batching, enters mixing machine after batching and mixes with dry, and drying source is the heat that blast furnace gas+the coke-oven gas burning produces; Slaked lime is binding agent and the basicity of regulating vanadium-titanium pellet;
B, profit mill: adopt damp mill the compound profit of A step is milled to＜200 order grain size contents reach 70-90%;
C, pelletizing: adopt balling disc to add suitable quantity of water in the pelletizing process, make the green-ball moisture controlled at 8-10.5%, pelletizing time 10-30min, green-ball granularity 10-25mm;
D, drying, preheating, roasting: drying temperature 200-300 ℃; Preheating temperature 800-1000 ℃, warm up time 10-25min; Maturing temperature is 1100-1300 ℃, roasting time 25-40min;
E, cooling, screening: agglomerates is carried out cooling, screening obtain the finished ball nodulizing that granularity is 9-18mm.
2. preparation method according to claim 1, is characterized in that, described pellet basicity is preferably 0.4-0.6.
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| CN115820966B (en) * | 2022-11-15 | 2024-02-09 | 攀钢集团攀枝花钢铁研究院有限公司 | Reduction and non-blast furnace smelting method for alkaline vanadium-titanium pellet heating and pressing carbon-containing vanadium-titanium pellet |
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| CN101003851A (en) * | 2006-09-22 | 2007-07-25 | 攀钢集团钢城企业总公司球团厂 | Method for producing high titanium type acid pellet vanadium titanium by chain grate - rotary kiln |
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