CN101717852B - Sintering method of high-Ti type V-Ti magnetite concentrate - Google Patents
Sintering method of high-Ti type V-Ti magnetite concentrate Download PDFInfo
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Abstract
The invention provides a sintering method of a high-Ti type V-Ti magnetite concentrate, comprising the following steps of: carrying out granularity treatment on a coke powder, a rich ore powder and a return fine powder which are used for sintering; carrying out damp milling treatment on a medium-Ti type V-Ti magnetite concentrate to enable the proportion of granules to the granularity smaller than 0.074mm in the medium-Ti type V-Ti magnetite concentrate to achieve above 55 percent; and burdening the medium-Ti type V-Ti magnetite concentrate with the weight percent of 5-12.5 to replace the high-Ti type V-Ti magnetite concentrate, and mixing by adding water in a mixture after the medium-Ti type V-Ti magnetite concentrate, the high-Ti type V-Ti magnetite concentrate, the rich ore powder, quick limb, limestone, the coke powder and the return fine powder are proportioned and put into a blending silos; and carrying out ignition and air draft sintering by filling the mixture into a sintering cup, wherein a FeO content range of a sintering ore is controlled from 7.6wt percent to 8.1wt percent, the sintering temperature is controlled at 1270-1340 DEG C, the vertical sintering speed is controlled from 17.8mm/min to 18.6mm/min, and the thickness of a material layer is above 650mm.
Description
Technical field
The present invention relates to a kind of sintering method of high-Ti type V-Ti magnetite concentrate, more particularly, the present invention relates to a kind of in the part Ti type V-Ti magnetite concentrate replace the sintering method of the high-Ti type V-Ti magnetite concentrate of a part of high-Ti type V-Ti magnetite concentrate.
Background technology
Because the Flos Bombacis Malabarici v-ti magnetite concentrate has coarse size (≤0.074mm accounts for 52%), low silicon (SiO
2Account for about 3.3%), high titanium (TiO
2More than 12.7%), the singularity of balling-up property and water-absorbent difference; Therefore easy-sintering not; And in sintering process, generated the crisp uhligite of property; Sintered iron hydrochlorate low temperature bonding mutually less and its form different with ordinary sinter ore deposit calcium ferrite, cause that sinter strength is poor, yield rate is low, low temperature reduction degradation index (RDI
-3.15) height, seriously restricted the raising of smelting strength of blast furnace.Research shows, the utilization coefficient of sinter machine 1.0～1.1t/ (m only during the SINTERING PRODUCTION of full vanadium titanium agglomerate
2H) (agglomerate ton amount is produced in expression per hour every square metre of area), yield rate is less than 50.0%, and the comprehensive barrate strength of agglomerate (ISO) is merely about 65.0%.
Along with the specification of quality of high-Ti type V-Ti magnetite concentrate blast furnace strengthening smelting to agglomerate, the difficulty of the further raising of high-Ti type V-Ti magnetite concentrate sintering quality strengthens.For promoting the comprehensive utilization and the strategic control of resource; Guarantee the practicality of producing simultaneously; Physics, chemical index characteristics according to middle Ti type V-Ti magnetite concentrate; Smelting with high-Ti type V-Ti magnetite concentrate in conjunction with blast furnace is the reality of main iron-bearing material, has carried out the experimental study that Ti type V-Ti magnetite concentrate is produced the high-Ti type V-Ti agglomerate in the part.Data investigation shows, at present in the schreyerite sintering in the part test and the production means of Ti type V-Ti magnetite concentrate do not appear in the newspapers.
Summary of the invention
The object of the present invention is to provide a kind of sintering method that substitutes the high-Ti type V-Ti magnetite concentrate of part high-Ti type V-Ti magnetite concentrate with addition of middle Ti type V-Ti magnetite concentrate.In the method, through substituting the part high-Ti type V-Ti magnetite concentrate, stablized TiO in the agglomerate with addition of middle Ti type V-Ti magnetite concentrate
2Content, improved the batching structure of raw materials for sintering, effectively improve the mineral composition and the structure of agglomerate, thereby improve the quality and the output of agglomerate.Therefore, under identical intensified-sintered measure, can make the yield rate of high-Ti type V-Ti agglomerate reach present 74.5%, comprehensive barrate strength (ISO) reaches 72%, and productivity of sintering machine reaches 1.3t/ (m
2H) more than.
The one side of the embodiment of the invention provides a kind of sintering method of high-Ti type V-Ti magnetite concentrate.The step that said method comprises has: sintering coke powder, rich ore breeze, the breeze of returning mine are carried out granularity handle; The centering Ti type V-Ti magnetite concentrate moistens mill to be handled, and the ratio of the particle of granularity＜0.074mm reaches more than 55% in the feasible middle Ti type V-Ti magnetite concentrate; With addition of weight percent is that 5～12.5% middle Ti type V-Ti magnetite concentrate substitutes high-Ti type V-Ti magnetite concentrate, with middle Ti type V-Ti magnetite concentrate, high-Ti type V-Ti magnetite concentrate, rich ore breeze, unslaked lime, Wingdale, coke powder, returning mine to allocate into adds water behind the blending bunker and mix in mixer; With the compound down draft sintering of lighting a fire in the sintered cup of packing into; Wherein, the FeO content range of agglomerate is controlled at 7.6wt%～8.1wt%, sintering temperature is controlled at 1270 ℃～1340 ℃; Vertical sintering speed is controlled at 17.8mm/min～18.6mm/min, and bed thickness is more than 650mm.
In addition; The granularity processed steps can comprise: coke powder is sieved processing; Make the ratio of the particle of granularity＜3mm in the coke powder reach 81 ± 2%; Particle to granularity＞5mm carries out break process, and the ratio of the particle of granularity＞5mm is screened out basically, and the ratio of the particle of granularity＜5mm reaches 93 ± 2%.The granularity processed steps also can comprise: the particle to granularity＞8mm in the rich ore breeze carries out break process.In addition, the granularity processed steps also can comprise: the ratio of the particle of the middle granularity＞5mm that will return mine screens out basically, makes the ratio of the particle of granularity＜5mm reach 95 ± 2%.
In addition, after the centering Ti type V-Ti magnetite concentrate moistened the mill processing, making the ratio of the particle of granularity＞0.149mm in the middle Ti type V-Ti magnetite concentrate was 3～7%, and granularity is that the ratio of the particle of 0.149mm～0.074mm is 40 ± 3%.
In addition, with addition of the weight percent of unslaked lime be 5wt%～8wt%.
In sintering step, sintered cup grate-layer material granularity is 10mm～20mm, and grate-layer material thickness is 20mm, and be 2min ignition time, and the igniting negative pressure is 5880Pa, and the sintering negative pressure is 11760Pa.On the agglomerate surface that obtains behind the sintering, spray CaCl
2, CaCl
2The concentration of solution is 1.3wt～1.5wt%, and flow is 5.0～5.3kg/ts (representing that agglomerate PM per ton sprays 5.0～5.3kg solution).
Coke powder is 4.8wt%～4.95wt% with addition of ratio in the raw materials for sintering.The rich ore breeze of allocating in the raw material comprises middle grade rich ore breeze, higher-grade rich ore breeze and Australia ore deposit.Wherein, middle grade rich ore breeze does not contain TiO
2, TFe content is 43.7wt%-49.8wt%, SiO
2Content is 13.8wt%-20.6wt%, Al
2O
3Content＜wt3%, moisture＜wt8%, and the proportioning of middle grade rich ore breeze is 5 ± 1wt%; Wherein, higher-grade rich ore breeze does not contain TiO
2, TFe content is 57.8wt%-60.2wt%, SiO
2Content is 6.1wt%-7.9wt%, Al
2O
3Content＜2.3wt%, moisture＜7.8wt%, and the proportioning of higher-grade rich ore breeze is common fine ore proportioning 12 ± 2wt%.Returning mine with addition of ratio in the raw materials for sintering is 35wt%～41wt%.The unslaked lime proportioning is 5.0wt%～8.0wt%, and unslaked lime adds water to be digested in 2: 1 ratios and process.TFe content is 51.21wt% in the middle Ti type V-Ti magnetite concentrate, SiO
2Content is 9.99wt%, and FeO content is 25.73wt%, TiO
2Be content 7.2wt%, V
2O
5Content be 0.55wt%, water cut is 9.5wt%.
Embodiment
To describe sintering method below in detail with addition of the high-Ti type V-Ti magnetite concentrate of middle Ti type V-Ti magnetite concentrate according to the embodiment of the invention.
According to the sintering method of the high-Ti type V-Ti magnetite concentrate of the embodiment of the invention metallurgical performance, raw material for sintering has been carried out suitable proportioning according to rock character, sintering basic characteristic (fusing property, same voltinism), gangue kind and the quantity of iron-bearing material, ore structure, size-grade distribution, agglomerate.
Table 1 shows the proportioning situation of four batches raw materials for sintering.
The proportioning situation (counting by weight percentage) of table 1 raw materials for sintering
| Batch | High-Ti type V-Ti magnetite concentrate | Middle Ti type V-Ti magnetite concentrate | Rich ore | Unslaked lime | Wingdale | Coke powder | Return mine |
| 1 | 47 | 5 | 28 | 5 | 7.7 | 4.8 | 35 |
| 2 | 44.5 | 7.5 | 28 | 6 | 6.3 | 4.85 | 37 |
| 3 | 42 | 10 | 28 | 7 | 5 | 4.9 | 39 |
| 4 | 39.5 | 12.5 | 28 | 8 | 3.6 | 4.95 | 41 |
From table 1, can know; In above-mentioned four batches; The iron charge proportioning is: grade rich ore 5 ± 1% during v-ti magnetite concentrate 52% (comprising high-Ti type V-Ti magnetite concentrate and middle the Ti type V-Ti magnetite concentrate)+domestic higher-grade rich ore of Australia ore deposit 11 ± 2%+ 12 ± 2%+ is domestic; Wherein, Australia ore deposit, domestic higher-grade rich ore and domestic in the grade rich ore and be the rich ore in the table 1.The flux proportioning is: Wingdale 3.6-7.7%, unslaked lime 5-8%.Fuel ratio is: coke powder 4.8-4.95% (or hard coal proportioning 6.8%).
In the layoutprocedure of above-mentioned raw materials, return mine and take the outer method of joining.In actual production, only iron charge is fixed on 80% at weight percent, the ratio of rest materials is unfixing, can require to do suitable adjustment according to producing the agglomerate composition.
Above-mentioned raw materials used main physical and chemical indexes is (each components in proportions all is weight percentage):
High-Ti type V-Ti magnetite concentrate ω (TFe) 53.7-54.3%, ω (SiO
2) 3.1-3.5%, ω (FeO) 31.6%, ω (TiO
2) 12.65-13.2%, ω (V
2O
5) 0.56-0.59%, ω (moisture) 10～11.5%;
Middle Ti type V-Ti magnetite concentrate ω (TFe) 51.21%, ω (SiO
2) 9.99%, ω (FeO) 25.73%, ω (TiO
2) 7.2%, ω (V
2O
5) 0.55%, ω (moisture) 9.5%;
Australia ore deposit ω (TFe) 61.3-63.4%, ω (SiO
2) 3.6-4.3%;
Domestic higher-grade rich ore ω (TFe) 57.8-60.2%, ω (SiO
2) 6.1-7.9%, ω (Al
2O
3)＜2.3%, ω (moisture)＜7.8%;
Grade rich ore ω (TFe) 43.7-49.8% in domestic, ω (SiO
2) 13.8-20.6%, ω (Al
2O
3)＜3%, ω (moisture)＜8%;
Unslaked lime ω (CaO) 84.7-87.9%;
Wingdale ω (staple CaO) 50.3-53.7%, granularity＜3.0mm, grade 87-93.5%;
Coke powder ash content 13-16.5%, granularity＜3.0mm, grade 81 ± 2%;
ω (TFe) 48.5-49.2% that returns mine, ω (SiO
2) 5.25-5.65%, ω (CaO) 12.0-12.5%; The particle ratio of granularity＜5mm is 95 ± 2%.
After having confirmed various proportion of raw materials, before carrying out raw materials mix, also to handle the granularity of various raw materials.
Middle Ti type V-Ti magnetite concentrate coarse size,＜0.074mm (200 order) ratio only accounts for 5%, than low about 50 percentage points of high-Ti type V-Ti magnetite concentrate, will inevitably produce certain influence to mixture granulation like this.Middle Ti type V-Ti magnetite concentrate is coarse size not only, and particle is perfectly round, and the edge is smooth and fine and close, so its wetting ability is poor, is difficult to adhere on the nuclear particle.Can know according to prior art, the particle of granularity in 0.2～0.7mm scope in the iron ore, it is difficult in pelletization, to make the ball heart, and it is also difficult to do adhesion layer.
Therefore; With middle Ti type V-Ti magnetite concentrate with before high-Ti type V-Ti magnetite concentrate mixes; The centering Ti type V-Ti magnetite concentrate moistens mill to be handled, and the ratio of the particle of granularity＜0.074mm reaches more than 55%, wherein in the feasible middle Ti type V-Ti magnetite concentrate; The ratio of the particle of granularity＞0.149mm is 3～7%; Granularity be the ratio of particle of 0.149mm～0.074mm 40 ± 3%, therefore, the size composition of middle Ti type V-Ti magnetite concentrate reaches the granular level of high-Ti type V-Ti magnetite concentrate.The centering Ti type V-Ti magnetite concentrate moistens mill to be handled, and the granularity of Ti type V-Ti magnetite concentrate improves its wetting heat in can reducing, and improves sintering character.Wetting heat without the pretreated middle Ti type V-Ti magnetite concentrate of profit mill only has 0.163J/g, shows that its surface hydrophilicity is relatively poor.After taking the profit mill to handle, the wetting heat of middle Ti type V-Ti magnetite concentrate is brought up to 0.392J/g.Therefore, the profit mill is handled surface properties and the hydrophilicity that has improved middle Ti type V-Ti magnetite concentrate effectively, helps it and better adheres to the nuclear particle surface, improves granulating efficiency, and is intensified-sintered.After taking the profit mill to handle, profit is ground the chemical energy that mechanical energy is converted into the material surface, has promptly increased specific surface area and lattice imperfection, thereby has increased surface free energy, and itself and polar molecule effect are strengthened.
Therefore, do not taking under the profit mill disposition, middle Ti type V-Ti magnetite concentrate is unfavorable for the balling-up of granulating, thereby in sintering process, middle Ti type V-Ti magnetite concentrate has shown the characteristics that vertical sintering speed is slow, utilization coefficient is low.Taking after profit mill handles, vertical sintering speed, utilization coefficient during middle Ti type V-Ti magnetite concentrate single fire all obviously improve.
In addition, before raw materials mix, also need handle coke powder, rich ore and the granularity of returning mine.
Specifically; The sintering coke powder is sieved processing, make the ratio of the particle of granularity＜3mm in the coke powder reach 81 ± 2%, the particle of granularity＞5mm is carried out break process; The ratio of the particle of granularity＞5mm is screened out basically, and the ratio of the particle of granularity＜5mm reaches 93 ± 2%.
Particle to granularity＞8mm in the rich ore in the raw materials for sintering carries out break process.
The ratio of particle of middle granularity＞5mm of will returning mine screens out basically, makes the ratio of particle of granularity＜5mm reach 95 ± 2%.
Next; According to the ratio shown in the table 1, the middle Ti type V-Ti magnetite concentrate after handling with addition of part profit mill substitutes a part of high-Ti type V-Ti magnetite concentrate, rich ore, unslaked lime, Wingdale, coke powder, returning mine to allocate into adds water behind the blending bunker and mix in mixer.
With the compound down draft sintering of lighting a fire in the sintered cup of packing into, sintered cup grate-layer material granularity is 10～20mm, and grate-layer material thickness is 20mm, and be 2min ignition time, and the igniting negative pressure is 5880Pa, sintering negative pressure 11760Pa.
The condition that the high-titanium type vanadium titanium ore sinters merit into is to make compound calcium ferrite replace silicate to make the bonding phase.Therefore, remove high-alkali being outside one's consideration, low-temperature sintering and oxidizing atmosphere also are to guarantee the successful prerequisite of sintering.Because middle Ti type V-Ti magnetite concentrate self granularity is thicker, cause in the sintering process atmosphere unreasonable, in order to improve the sintering character behind the middle Ti type V-Ti magnetite concentrate, must set about FeO, sintering process temperature that control is suitable from improving sintering operation.In the sintering operation process according to the embodiment of the invention: the FeO scope is controlled at 7.6～8.1%, the sintering process temperature is controlled at 1270～1340 ℃, vertical sintering speed is controlled at 17.8～18.6mm/min, and bed thickness is more than 650mm.Guarantee sintering atmosphere hyperoxia position like this, suppressed the vanadium haplotypite generates hardness height, intensity difference in sintering process uhligite simultaneously.As stated; Sintering process operation according to the embodiment of the invention; Adopt deep-bed sintering can reduce vertical sintering speed, prolong the high temperature hold-time, guarantee the mineral sufficient crystallising; Have vital role to improving sinter strength and yield rate, it is not enough to have remedied the high-titanium type vanadium-titanium magnetite agglomerating.
In addition, vanadium titanium agglomerate low temperature reduction degradation index (DRI
+ 315) more much higher than common ore deposit, DRI
+ 3.15Index is less than 50%, and ordinary sinter ore deposit DRI
+ 315Index is generally all greater than 70%.For improving the defective that vanadium titanium agglomerate low-temperature reduction disintegration can differ from, the present invention is going on the agglomerate of stokehold to spray CaCl
2Solution, wherein, CaCl
2The concentration of solution is 1.3wt～1.5wt%, and flow is 5.0～5.3kg/ts.Spray halogenide and help principle that agglomerate reduces the low temperature Pulverization ratio and be that halogenide soaks into and the agglomerate surface that covers forms one deck salt film, thereby slow down agglomerate, stop reduction degradation (Fe in this temperature range 450 ℃～550 ℃ reduction
2O
3→ Fe
3O
4).Also take to reduce agglomerate TiO simultaneously
2The method of content reduces its low temperature reduction degradation index.
According to embodiments of the invention, the sintering of embodiment 1 to embodiment 4 for carrying out according to above-mentioned four batches proportioning raw materials respectively.Concrete situation is following:
Embodiment 1
Middle Ti type V-Ti magnetite concentrate is with addition of 5%, and the rich ore proportioning is 28%, and the proportioning of returning mine is 35%, and the unslaked lime proportioning is 5%, and the Wingdale proportioning is 7.7%, and dosage of coke is 4.8%, and sintering basicity is controlled to be 2.35 times of (CaO/SiO in the agglomerate
2Ratio), quicklime slaking water ratio is 2: 1, and sintered mixture moisture is 7.3 ± 0.1wt%, carries out light binder.
The result shows, compares with base period, and sintered compound material granularity＞3mm proportion reaches 57%; Calcium ferrite content increases by 1.5 percentage points in the agglomerate; Sintered ore rotary drum strength improves 0.5 percentage point, and yield rate improves 0.75 percentage point, and output improves 0.8%.
Embodiment 2
Middle Ti type V-Ti magnetite concentrate is with addition of 7.5%, and the rich ore proportioning is 28%, and the proportioning of returning mine is 37%; The unslaked lime proportioning is 6%, and the Wingdale proportioning is 6.3%, and dosage of coke is 4.85%; Sintering basicity is 2.35; Quicklime slaking water ratio is 2: 1, and sintered mixture moisture is 7.3%, carries out light binder.
The result shows, compares with base period, and sintered compound material granularity＞3mm proportion reaches 61%; Calcium ferrite content increases by 1.75 percentage points in the agglomerate; Sintered ore rotary drum strength improves 0.5 percentage point, and yield rate improves 1.8 percentage points, and output improves 2.0%.
Embodiment 3
Middle Ti type V-Ti magnetite concentrate is with addition of 10%, and the rich ore proportioning is 28%, and the proportioning of returning mine is 39%; The unslaked lime proportioning is 7%, and the Wingdale proportioning is 5%, and dosage of coke is 4.9%; Sintering basicity is 2.35; Quicklime slaking water ratio is 2: 1, and sintered mixture moisture is 7.3+0.1%, carries out light binder.
The result shows, compares with base period, and sintered compound material granularity＞3mm proportion reaches 67%, and calcium ferrite content increases by 2 percentage points in the agglomerate, and sintered ore rotary drum strength improves 0.8 percentage point, and yield rate improves 2.3 percentage points, and output improves 3.0%.
Embodiment 4
Middle Ti type V-Ti magnetite concentrate is with addition of 12.5%, and the rich ore proportioning is 28%, and the proportioning of returning mine is 41%; The unslaked lime proportioning is 8%, and the Wingdale proportioning is 3.6%, and dosage of coke is 4.95%; Sintering basicity is 2.35; Quicklime slaking water ratio 2: 1, sintered mixture moisture 7.4 ± 0.1% carries out light binder.
The result shows, compares with base period, and sintered compound material granularity＞3mm proportion reaches 75%; Calcium ferrite content increases by 1.8 percentage points in the agglomerate; Sintered ore rotary drum strength improves 0.67 percentage point, and yield rate improves 2.1 percentage points, and output improves 2.6%.
Therefore, can know the intensified-sintered effect of middle Ti type V-Ti magnetite concentrate from the foregoing description; The ratio of sintered compound material granularity＞3mm is brought up to more than 75% by 52%, improved sintered mixture ventilation, promote the generation of local compound calcium ferrite; Calcium ferrite content increases more than 1.5～2 percentage points in the agglomerate; The comprehensive barrate strength of agglomerate (ISO) improves 0.5～0.8 percentage point, and yield rate improves 0.75～2.3 percentage point, and output improves 0.8%～3.0%.
Think relatively that comprehensively in an embodiment according to the present invention, after middle Ti type V-Ti magnetite concentrate moistened mill and handle, proportioning was 10% to be preferred.
Although having specifically described with addition of the sintering of the high-Ti type V-Ti magnetite concentrate of middle Ti type V-Ti magnetite concentrate with reference to embodiments of the invention is method; But those skilled in the art will be appreciated that; Under the situation that does not break away from the spirit and scope of the present invention, can make various forms of changes to embodiment.
Claims (9)
1. the sintering method of a high-Ti type V-Ti magnetite concentrate, TFe content is 53.7-54.3wt% in the high-Ti type V-Ti magnetite concentrate, SiO
2Content be 3.1-3.5wt%, the content of FeO is 31.6wt%, TiO
2Content be 12.65-13.2wt%, V
2O
5Content be 0.56-0.59wt%, the content of moisture is 10～11.5wt%, the step that said method comprises has:
Sintering coke powder, rich ore breeze, the breeze of returning mine are carried out granularity to be handled;
The centering Ti type V-Ti magnetite concentrate moistens mill to be handled, and the ratio of the particle of granularity＜0.074mm reaches more than 55% in the feasible middle Ti type V-Ti magnetite concentrate, and wherein, TFe content is 51.21wt% in the middle Ti type V-Ti magnetite concentrate, SiO
2Content is 9.99wt%, and FeO content is 25.73wt%, TiO
2Be content 7.2wt%, V
2O
5Content be 0.55wt%, water cut is 9.5wt%;
Substitute high-Ti type V-Ti magnetite concentrate with addition of middle Ti type V-Ti magnetite concentrate; Middle Ti type V-Ti magnetite concentrate, high-Ti type V-Ti magnetite concentrate, rich ore breeze, unslaked lime, Wingdale, coke powder, the breeze of returning mine allocated in mixer, add water behind the blending bunker and mix; Wherein, The rich ore breeze is 28wt% with addition of ratio in the raw materials for sintering; Ti type V-Ti magnetite concentrate is 5-12.5wt% with addition of ratio in the raw materials for sintering, and coke powder is 4.8wt%～4.95wt% with addition of ratio in the raw materials for sintering; Unslaked lime is 5wt%～8wt% with addition of ratio in the raw materials for sintering; Wingdale is 3.6-7.7wt% with addition of ratio in the raw materials for sintering; Returning mine in the raw materials for sintering with addition of ratio is to join method outside 35wt%～41wt% and returning mine takes to add;
With the compound down draft sintering of lighting a fire in the sintered cup of packing into,
Wherein, the FeO content range of agglomerate is controlled at 7.6wt%～8.1wt%, sintering temperature is controlled at 1270 ℃～1340 ℃, and vertical sintering speed is controlled at 17.8mm/min～18.6mm/min, bed thickness more than 650mm,
Wherein, on the agglomerate surface that obtains behind the sintering, spray CaCl
2, CaCl
2The concentration of solution is 1.3wt%～1.5wt%, and flow is 5.0～5.3kg/ts.
2. method according to claim 1; Wherein, In the granularity processed steps, comprise: coke powder is sieved processing, make the ratio of the particle of granularity＜3mm in the coke powder reach 81 ± 2%, the particle of granularity＞5mm is carried out break process; The particle of granularity＞5mm is screened out basically, and the ratio of the particle of granularity＜5mm reaches 93 ± 2%.
3. method according to claim 1 wherein, comprises in the granularity processed steps: the particle to granularity＞8mm in the rich ore breeze carries out break process, and the particle of granularity＞8mm is screened out basically.
4. method according to claim 1 wherein, comprises in the granularity processed steps: the particle of the middle granularity＞5mm that will return mine screens out basically, makes the ratio of the particle of granularity＜5mm reach 95 ± 2%.
5. method according to claim 1 wherein, is moistened in the mill processed steps at the centering Ti type V-Ti magnetite concentrate, and the ratio that makes the particle of granularity＞0.149mm is 3～7%, and granularity is that the ratio of the particle of 0.149mm～0.074mm is 40 ± 3%.
6. method according to claim 1, wherein, in sintering step, sintered cup grate-layer material granularity is 10mm～20mm, and grate-layer material thickness is 20mm, and be 2min ignition time, and the igniting negative pressure is 5880Pa, the sintering negative pressure is 11760Pa.
7. method according to claim 1, wherein, the rich ore breeze of allocating in the raw material comprises middle grade rich ore breeze, higher-grade rich ore breeze and Australia ore deposit.
8. method according to claim 7,
Wherein, middle grade rich ore breeze does not contain TiO
2, TFe content is 43.7wt%-49.8wt%, SiO
2Content is 13.8wt%-20.6wt%, Al
2O
3Content＜3wt%, moisture＜8wt%, and the middle grade rich ore breeze in the raw materials for sintering is 5 ± 1wt% with addition of ratio;
Wherein, higher-grade rich ore breeze does not contain TiO
2, TFe content is 57.8wt%-60.2wt%, SiO
2Content is 6.1wt%-7.9wt%, Al
2O
3Content＜2.3wt%, moisture＜7.8wt%, and the higher-grade rich ore breeze in the raw materials for sintering is 12 ± 2wt% with addition of ratio.
9. method according to claim 1, wherein, unslaked lime adds water to be digested in 2: 1 ratios and processes.
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| CN102220485A (en) * | 2011-06-27 | 2011-10-19 | 攀钢集团有限公司 | Sintered vanadium-titanium magnetite concentrate quick full production method for large sintering machine |
| CN102251100B (en) * | 2011-06-27 | 2014-04-02 | 攀钢集团有限公司 | Method for sintering vanadium-titanium magnetite concentrate at high negative pressure and high air quantity |
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| CN103014325B (en) * | 2012-12-10 | 2015-09-02 | 攀钢集团研究院有限公司 | The sintering method of thin Baima V-ti-bearing Magnetite Concentrate |
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