CN104388669A - Method for improving drum strength of chromium-containing vanadium-titanium sinter - Google Patents
Method for improving drum strength of chromium-containing vanadium-titanium sinter Download PDFInfo
- Publication number
- CN104388669A CN104388669A CN201410612888.4A CN201410612888A CN104388669A CN 104388669 A CN104388669 A CN 104388669A CN 201410612888 A CN201410612888 A CN 201410612888A CN 104388669 A CN104388669 A CN 104388669A
- Authority
- CN
- China
- Prior art keywords
- sample
- cao
- iron ore
- strength
- ore
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention provides a method for improving the drum strength of a chromium-containing vanadium-titanium sinter. The method comprises the following steps: (1) preparing schreyerite fine powder, iron mine fine powder and CaO powder; (2) preparing a schreyerite sample, an iron mine sample and a CaO sample; (3) detecting the temperature of assimilability of a chromium-containing vanadium titano-magnetite and the iron mine with CaO; (4) detecting the fluidity of a liquid phase; (5) detecting the strength of a binding phase; (6) detecting the strength of crystal stock; (7) establishing a database; (8) carrying out dimensionless treatment on data; (9) carrying out complementary ore-blending according to the database. The method has the advantages of small workload and remarkable effect, and can be used for efficiently dealing with increasingly sophisticated raw material sources and unexpected material changes in production.
Description
Technical field
The invention belongs to technical field of mineral processing, particularly a kind of method improved containing chromium type vanadium titanium sintered ore rotary drum strength.
Background technology
Agglomerate is the main raw material of blast furnace ironmaking, barrate strength is the important indicator weighing sinter quality, this index is used for weighing the quality of agglomerate physical strength, agglomerate its epigranular good permeability when entering blast-furnace smelting that barrate strength is higher, and not easily dust is produced in transport process, can ensure that blast furnace obtains good smelting condition, improve the capacity factor of a blast furnace and reduce smelting cost.
There is abundant v-ti magnetite ore resources in China, is mainly distributed in Pan Xi and Chengde area, and wherein the explored prospective reserves of Panxi Diqu is more than 10,000,000,000 tons, and the explored reserves in Chengde area are more than 8,000,000,000 tons.Vanadium titano-magnetite is a kind of Pluralistic and semiotiC ore deposit, mainly based on iron, vanadium, titanium, is not only also attended by chromium containing iron, vanadium, titanium containing chromium type schreyerite, therefore has higher smelting and is worth.Simultaneously, the problems such as the production cost faced along with minimizing and the Iron and Steel Production of rich ore ratio, cheap the having great importance containing chromic vanadium-titanium ferroferrite of the use high added value of maximum ratio when meeting production requirement, but, for SINTERING PRODUCTION, owing to containing chromium type vanadium titanium agglomerate self, especially TiO
2existence, it produces in sintering process dystecticly frangible does not have close-burning uhligite, decreases containing the effective Binder Phase in chromium type vanadium titanium agglomerate simultaneously, thus causes containing chromium type vanadium titanium sinter strength lower, usually can not meet Production requirement.
Therefore in order to improve the barrate strength of agglomerate, often needing by feed change structure, optimizing sintering process and realizing, as Intensified support, improve bed depth, optimize cloth, improve the basicity of agglomerate, control moisture, optimize material temperature etc.But improve sinter strength by Optimization Technology and there is very large hysteresis quality, modern SINTERING PRODUCTION can not be met and become material fast, and be optimized the manpower of the equal at substantial of technique each time, material resources and financial resources, and traditional feed change structural measure is groped often through a large amount of sintering cup tests, the manpower that same needs consumption is a large amount of, material resources and financial resources, and the barrate strength that can not improve agglomerate in time efficiently.
Summary of the invention
For the problems referred to above that existing optimization exists containing the method for chromium type vanadium titanium sintered ore rotary drum strength, the invention provides a kind of method improved containing chromium type vanadium titanium sintered ore rotary drum strength, by will containing chromic vanadium-titanium ferroferrite and powdered iron ore levigate after make sample, measure the anabolic temperature of sample, measure Liquid phase flowability, bonding phase intensity and the crystal stock intensity of powdered iron ore (not containing vanadium-titanium-chromium) again, building database is used for selecting powdered iron ore and should joining ore deposit containing chromic vanadium-titanium ferroferrite, and acquisition the best that is quick, efficient, low cost joins ore deposit scheme.
Raising of the present invention is carried out according to the following steps containing the method for chromium type vanadium titanium sintered ore rotary drum strength:
1, granularity≤0.074mm will be finely ground to containing chromic vanadium-titanium ferroferrite powder, under 110 ± 2 DEG C of conditions, dry at least 2 hours, make schreyerite fine powder material; Powdered iron ore is finely ground to granularity≤0.074mm, under 110 ± 2 DEG C of conditions, dries at least 2 hours, make iron ore fine powder material; Prepare the CaO powder of granularity≤0.074mm;
2, schreyerite fine powder material is kept 2 ~ 3min under 15 ~ 16Mpa pressing pressure, make columned schreyerite sample; Iron ore fine powder material is kept 2 ~ 3min under 15 ~ 16Mpa pressing pressure, makes columned iron ore sample; CaO powder is kept 2 ~ 3min under 15 ~ 16Mpa pressing pressure, makes columned CaO sample;
3, schreyerite sample and iron ore sample are placed on above CaO sample respectively, then put into high temperature test stove, in air atmosphere, measure the anabolic temperature containing chromic vanadium-titanium ferroferrite and iron ore and CaO;
4, schreyerite fine powder material and iron ore fine powder material are mixed by the proportioning that total alkalinity is 2.0 ~ 6.0 with CaO powder respectively, then keep 2 ~ 3min under 15 ~ 16Mpa pressing pressure, make cylindric vanadium titanium-CaO sample and iron-CaO sample respectively; Vanadium titanium-CaO sample and iron-CaO sample are put into high temperature test stove respectively, and Isothermal sinter 4 ~ 5min under 1250 ± 10 DEG C and nitrogen atmosphere condition, then measures the Liquid phase flowability of two kinds of samples respectively respectively;
5, schreyerite fine powder material and iron ore fine powder material are mixed by the proportioning that total alkalinity is 1.7 ~ 2.7 with CaO powder respectively, then keep 2 ~ 3min under 15 ~ 16Mpa pressing pressure, make cylindric vanadium titanium-CaO sample to be sintered and iron-CaO sample to be sintered respectively; Vanadium titanium-CaO sample to be sintered and iron-CaO sample to be sintered are put into high temperature test stove respectively, Isothermal sinter 4 ~ 5min under 1280 ± 10 DEG C and nitrogen atmosphere condition respectively, be prepared into vanadium titanium-CaO respectively and sinter rear sample and the rear sample of iron-CaO sintering, adopt pressing machine to measure the ultimate compression strength of two kinds of rear samples of sintering after cooling respectively, be the binder strength of powdered iron ore and magnetite powder;
6, vanadium titanium sample and iron ore sample are put into high temperature test stove respectively, Isothermal sinter 4 ~ 5min under 1280 ± 10 DEG C and nitrogen atmosphere condition, to be prepared into after vanadium titanium sintering sample after sample and agglomeration for iron mine respectively, under pressing machine, measure the ultimate compression strength of two kinds of rear samples of sintering after cooling respectively, be the crystal stock intensity of powdered iron ore and magnetite powder;
7, anabolic, Liquid phase flowability, the binder strength containing chromium type sefstromite powder and powdered iron ore and crystal stock intensity data storehouse is set up;
8, nondimensionalization process is carried out to data;
9, by above-mentioned database, for the one or more poor characteristic containing chromium type vanadium titanium valve, select the good powdered iron ore of this characteristic to carry out complementation with it and join ore deposit, determine that the weight of each index is: liquid phase flow sex index 50%, binder strength 20%, anabolic temperature 20%, crystal stock intensity 10%; Join the weighted index >3 of sample behind ore deposit.
In aforesaid method, the identical pressing pressure that each step all adopts in a collection of experiment, keeps the identical time; And the equal diameters of schreyerite sample and iron ore sample, iron ore sample is 1:(2 ~ 3 with the diameter ratio of calcium oxide sample).
In above-mentioned step 7, when minimum assimilation temperature is less than 1200 DEG C, judge that powdered iron ore has high anabolic; When minimum assimilation temperature is within the scope of 1200 ~ 1250 DEG C, judge that powdered iron ore has higher anabolic; When minimum assimilation temperature is within the scope of 1250 ~ 1280 DEG C, judge that powdered iron ore has medium anabolic; When minimum assimilation temperature is greater than 1280 DEG C, judge that powdered iron ore has weak anabolic; Fluidity index is rationally between 0.7 ~ 1.6, and the poor fluidity of sample is described lower than 0.7; It is reasonable that binder strength and crystal stock intensity are greater than 2000N.
In above-mentioned step 8, nondimensionalization process refers to: to set anabolic temperature <1200 DEG C duration be 5,1200 ~ 1250 DEG C of durations be 4,1250 ~ 1280 DEG C of durations is 3,1280 ~ 1320 DEG C of durations are 2, >1320 DEG C of duration is 1; Setting fluidity index >1.6 duration is 5,1.0 ~ 1.6 durations be 4,0.6 ~ 1.0 duration be 3,0.1 ~ 0.6 duration be 2, <0.1 duration is 1; Setting binder strength >5000N duration is 5,3500 ~ 5000N durations be 4,2000 ~ 3500N durations be 3,1000 ~ 2000N durations be 2, <1000N duration is 1; Setting crystal stock intensity >5000N duration is 5,3500 ~ 5000N durations be 4,2000 ~ 3500N durations be 3,1000 ~ 2000N durations be 2, <1000N duration is 1.
In above-mentioned step 9, for improving content of vanadium in agglomerate, choose the proportioning that schreyerite content is maximum when meeting barrate strength requirement; Secondly based on sintering basic characteristic, when improving its intensity to vanadium titanium valve Optimization Ore Matching, first consider general powder Liquid phase flowability, being binder strength and anabolic, is finally crystal stock intensity; By studying the affecting laws of each index to tumbler index, obtain the weight standard of each index and sample.
After aforesaid method completes, to one or more groups preferably combination selected, carry out sintering cup test, to obtain after agglomerate, by ISO3271 standard test barrate strength, verifying whether its value reaches requirement.
The above-mentioned Iron grade TFe containing chromium type sefstromite powder, 50.0 ~ 68.0%, contains SiO according to weight percent
23.0 ~ 5.0%, TiO
21.0 ~ 5.0%, Cr
2o
30.1 ~ 1.0%; The Iron grade TFe of above-mentioned powdered iron ore, 54 ~ 65%, contains SiO by weight percentage
24.8 ~ 6.5%.
The principle of aforesaid method is: although vanadium titanium valve is anabolic, binder strength and crystal stock intensity better, but because vanadium titanium valve Liquid phase flowability is not enough, cause effective amount of liquid phase in vanadium titanium agglomerate not enough, it is the topmost reason causing vanadium titanium valve barrate strength poor, based on sintering basic characteristic general powder good for Liquid phase flowability and its be optimized and join ore deposit and can effectively improve the Liquid phase flowability mixing iron powder, improve Sinter phase amount, reduce agglomerate hole, improve vanadium titanium sinter strength.Under effective amount of liquid phase has comparatively suitable level, binder strength and crystal stock intensity have material impact to barrate strength.
Traditional sintered ore rotary drum strength join ore deposit preferred method, inherently, belong to exploratory and join ore deposit, therefore blindness are large, thus the manpower expended, financial resources are more; And owing to not knowing the complementary characteristic of iron ore, very difficult realization truly preferred; Carry out preferably according to present method, the autonomous Optimization Ore Matching of sintering is truly made to become possibility, by the assurance of the sintering basic characteristic to iron ore, the novel ore blending system simultaneously meeting agglomerate cost optimization and sintered ore rotary drum strength optimization can be set up, it can not only Accurate Prediction sintered ore rotary drum strength, and can produce according to the specification of quality of agglomerate the Iron Ore Matching in Sintering scheme optimized.
Feature of the present invention is not need to transform sintering process, without the need to a large amount of sintering cup tests, what only need by containing chromium type schreyerite powder and powdered iron ore (not containing vanadium-titanium-chromium) is anabolic, Liquid phase flowability, binder strength and crystal stock intensity detect, set up the database of powdered iron ore four kinds of characteristics, according to the quality containing chromium type vanadium titanium valve four kinds of characteristics, corresponding complementary powdered iron ore is selected to carry out joining ore deposit with it, just reach preferably containing the object of chromium type vanadium titanium sintered ore rotary drum strength by a small amount of sintering cup test, workload is little, Be very effective, increasingly sophisticated raw material sources and the change of the burst in producing material can be tackled efficiently.
Accompanying drawing explanation
Fig. 1 is the method flow schematic diagram of raising of the present invention containing chromium type vanadium titanium sintered ore rotary drum strength;
Fig. 2 is the anabolic testing method schematic diagram of step 3 in method of the present invention; In figure, top sample is iron ore sample, and below is CaO sample;
Fig. 3 is the anabolic test result figure of Fig. 2, in figure, the black part of two kinds of sample connections is divided into two samples to carry out the generation sample of anabolic reaction, in figure, A is not assimilation (both are reactionless), B is anabolic reaction (iron ore sample leaves a circle black marks on CaO sample), and C melts (iron ore sample is obviously out of shape); Temperature when carrying out anabolic reaction is assimilation temperature;
Fig. 4 is the Liquid phase flowability testing method schematic diagram of step 4 in method of the present invention; In figure, top sample is vanadium titanium-CaO sample or iron-CaO sample, and below is nickel sheet;
Fig. 5 is the fluidity testing result figure of Fig. 4, and in figure, upper figure is that before reaction, the area of sample is S
1; Figure below is for after reaction, and the area of sample is S
2; Fluidity index=(S
2-S
1)/S
1;
Fig. 6 is the binder strength testing method schematic diagram of step 5 in method of the present invention; In figure, top sample is vanadium titanium-CaO sample or iron-CaO sample, and below is nickel sheet;
Fig. 7 is the crystal stock strength test method schematic diagram of step 6 in method of the present invention; In figure, top sample is vanadium titanium-CaO sample or iron-CaO sample, and below is nickel sheet;
Fig. 8 is the electron micrograph that the agglomerate in the embodiment of the present invention 1 obtains under Leica DM1750M electron microscope;
Fig. 9 is the electron micrograph that the agglomerate of contrast experiment's acquisition in the embodiment of the present invention 4 obtains under Leica DM1750M electron microscope.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
The equipment observing microstructure adopt in the embodiment of the present invention is Leica DM1750M electron microscope;
The high-temperature experimental furnace adopted in the embodiment of the present invention is SJ-2013 infrared rays quick high-temp test furnace.
The agglomerating plant adopted in the embodiment of the present invention is NEU-2012 type sinter machine.
The sample Preparation equipment adopted in the embodiment of the present invention is ZY-700 type automatic demolding sample preparation device.
The intensity test equipment adopted in the embodiment of the present invention is ZQYC-10C type compression strength investigation instrument.
The schreyerite sample prepared in the embodiment of the present invention and the weight of iron ore sample are 0.8 ~ 1.0g, diameter 8 ~ 10mm; The weight of the CaO sample of preparation is 2.0 ~ 2.5g, diameter 16 ~ 25mm.
The weight of vanadium titanium-CaO sample to be sintered, iron-CaO sample to be sintered, vanadium titanium-CaO sample and the iron-CaO sample prepared in the embodiment of the present invention is 0.8 ~ 1.0g, diameter 8 ~ 10mm.
The height of the sample prepared in the embodiment of the present invention is 5mm.
In the embodiment of the present invention, the parameter of sintering cup test is: bed depth 700mm, sintered cup diameter 320mm, igniting negative pressure 5.0kPa, sintering negative pressure 10.0kPa, ignition temperature 1000 DEG C, ignition time 2min, grate-layer material height 20mm, Granulation time 8min.
Being provided by Chengde Jianlong Special Steel Co., Ltd containing chromium type sefstromite powder and powdered iron ore in the embodiment of the present invention, the model containing chromium type sefstromite powder is HC, DB, HW, YT, JL and FH, and the model of powdered iron ore is YD, NF or PT.
Embodiment 1
1, granularity≤0.074mm will be finely ground to containing chromic vanadium-titanium ferroferrite powder, under 110 ± 2 DEG C of conditions, dry at least 2 hours, make schreyerite fine powder material; Powdered iron ore is finely ground to granularity≤0.074mm, under 110 ± 2 DEG C of conditions, dries at least 2 hours, make iron ore fine powder material; Prepare the CaO powder of granularity≤0.074mm;
2, schreyerite fine powder material is kept 2 ~ 3min under 15 ~ 16Mpa pressing pressure, make columned schreyerite sample; Iron ore fine powder material is kept 2 ~ 3min under 15 ~ 16Mpa pressing pressure, makes columned iron ore sample; CaO powder is kept 2 ~ 3min under 15 ~ 16Mpa pressing pressure, makes columned CaO sample;
Require that above-mentioned each sample keeps same time in the preparation at the same pressure, and the equal diameters of schreyerite sample and iron ore sample, iron ore sample is 1:2.5 with the diameter ratio of calcium oxide sample;
3, schreyerite sample and iron ore sample are placed on above CaO sample respectively, then put into high temperature test stove, in air atmosphere, measure the anabolic temperature containing chromic vanadium-titanium ferroferrite and iron ore and CaO;
4, schreyerite fine powder material and iron ore fine powder material are mixed by the proportioning that total alkalinity is 2.0 ~ 6.0 with CaO powder respectively, then keep 2 ~ 3min under 15 ~ 16Mpa pressing pressure, make columned vanadium titanium-CaO sample and iron-CaO sample respectively; Vanadium titanium-CaO sample and iron-CaO sample are put into high temperature test stove respectively, and Isothermal sinter 4 ~ 5min under 1250 ± 10 DEG C and nitrogen atmosphere condition, then measures the Liquid phase flowability of two kinds of samples respectively respectively;
5, schreyerite fine powder material and iron ore fine powder material are mixed by the proportioning that total alkalinity is 1.7 ~ 2.7 with CaO powder respectively, then keep 2 ~ 3min under 15 ~ 16Mpa pressing pressure, make columned vanadium titanium-CaO sample to be sintered and iron-CaO sample to be sintered respectively; Vanadium titanium-CaO sample to be sintered and iron-CaO sample to be sintered are put into high temperature test stove respectively, Isothermal sinter 4 ~ 5min under 1280 ± 10 DEG C and nitrogen atmosphere condition respectively, be prepared into vanadium titanium-CaO respectively and sinter rear sample and the rear sample of iron-CaO sintering, adopt pressing machine to measure the ultimate compression strength of two kinds of rear samples of sintering after cooling respectively, be the binder strength of powdered iron ore and magnetite powder;
6, vanadium titanium sample and iron ore sample are put into high temperature test stove respectively, Isothermal sinter 4 ~ 5min under 1280 ± 10 DEG C and nitrogen atmosphere condition, to be prepared into after vanadium titanium examination sintering sample after sample and agglomeration for iron mine respectively, under pressing machine, measure the ultimate compression strength of two kinds of rear samples of sintering after cooling respectively, be the crystal stock intensity of powdered iron ore and magnetite powder;
7, anabolic, Liquid phase flowability, the binder strength containing Cr-V-Ti powdered iron ore and powdered iron ore and crystal stock intensity data storehouse is set up;
Database is as shown in table 1;
Table 1
When minimum assimilation temperature is less than 1200 DEG C, judge that powdered iron ore has high anabolic; When minimum assimilation temperature is within the scope of 1200 ~ 1250 DEG C, judge that powdered iron ore has higher anabolic; When minimum assimilation temperature is within the scope of 1250 ~ 1280 DEG C, judge that powdered iron ore has medium anabolic; When minimum assimilation temperature is greater than 1280 DEG C, judge that powdered iron ore has weak anabolic; Fluidity index is rationally between 0.7 ~ 1.6, and the poor fluidity of sample is described lower than 0.7; It is reasonable that binder strength and crystal stock intensity are greater than 2000N;
8, nondimensionalization process is carried out to data; To set anabolic temperature <1200 DEG C duration be 5,1200 ~ 1250 DEG C of durations be 4,1250 ~ 1280 DEG C of durations be 3,1280 ~ 1320 DEG C of durations be 2, >1320 DEG C of duration is 1; The sample fluidity index >1.6 duration of setting basicity 4.0 be 5,1.0 ~ 1.6 durations is 4,0.6 ~ 1.0 duration be 3,0.1 ~ 0.6 duration be 2, <0.1 duration is 1; Setting binder strength >5000N duration is 5,3500 ~ 5000N durations be 4,2000 ~ 3500N durations be 3,1000 ~ 2000N durations be 2, <1000N duration is 1; Setting crystal stock intensity >5000N duration is 5,3500 ~ 5000N durations be 4,2000 ~ 3500N durations be 3,1000 ~ 2000N durations be 2, <1000N duration is 1;
9, by above-mentioned database, for the one or more poor characteristic containing chromium type vanadium titanium valve, select the good powdered iron ore of this characteristic to carry out complementation with it and join ore deposit, the weight of each index is: liquid phase flow sex index 50%, binder strength 20%, anabolic temperature 20%, crystal stock intensity 10%; For improving content of vanadium in agglomerate, choose the proportioning that schreyerite content is maximum when meeting barrate strength requirement;
According to table 1, after carrying out nondimensionalization process, choose the proportioning that schreyerite proportioning is maximum, ratio gradient is set to 10%, chooses preferably combination according to database.When DB:PT is 90:10 proportioning, weighted index=(4*0.9+4*0.1) * 0.2+ (2*0.9+3*0.1) * 0.5+ (4*0.9+4*0.1) * 0.2+ (5*0.9+4*0.1) * 0.1=3.14, meets the demands.
According to the proportioning of DB:PT=90:10, carry out sintered cup experiment, basicity is set as 1.9, and outer mixed carbon comtent is set as 3.2%, verifies sintered ore rotary drum strength result.When test-results is 90%DB+10%PT combination, sintered ore rotary drum strength is 66.58%, meets the requirements.
Embodiment 2
According to embodiment 1 table 1, poor for Liquid phase flowability is prepared burden according to the ratio of mass ratio 50:50 containing chromium type vanadium titanium valve HW and the good powdered iron ore PT of Liquid phase flowability, weighted index=3.05, sinter by the parameter of embodiment 1, and what obtain barrate strength 65.61% contains chromium type vanadium titanium agglomerate.
Embodiment 3
According to embodiment 1 table 1, poor for Liquid phase flowability is prepared burden according to the ratio of mass ratio 50:50 containing chromium type vanadium titanium valve HC and the common powdered iron ore NF of liquid phase, weighted index=3.00, sinter by the parameter of embodiment 1, and what obtain barrate strength 65.09% contains chromium type vanadium titanium agglomerate.
Embodiment 4
According to embodiment 1 table 1, directly prepare burden 100% containing chromium type vanadium titanium valve HC, sinter by the parameter of embodiment 1, what obtain barrate strength 58.26% contains chromium type vanadium titanium agglomerate.
Claims (6)
1. improve the method containing chromium type vanadium titanium sintered ore rotary drum strength, it is characterized in that carrying out according to the following steps:
(1) granularity≤0.074mm will be finely ground to containing chromic vanadium-titanium ferroferrite powder, under 110 ± 2 DEG C of conditions, dry at least 2 hours, make schreyerite fine powder material; Powdered iron ore is finely ground to granularity≤0.074mm, under 110 ± 2 DEG C of conditions, dries at least 2 hours, make iron ore fine powder material; Prepare the CaO powder of granularity≤0.074mm;
(2) schreyerite fine powder material is kept 2 ~ 3min under 15 ~ 16Mpa pressing pressure, make columned schreyerite sample; Iron ore fine powder material is kept 2 ~ 3min under 15 ~ 16Mpa pressing pressure, makes columned iron ore sample; CaO powder is kept 2 ~ 3min under 15 ~ 16Mpa pressing pressure, makes columned CaO sample;
(3) schreyerite sample and iron ore sample are placed on above CaO sample respectively, then put into high temperature test stove, in air atmosphere, measure the anabolic temperature containing chromic vanadium-titanium ferroferrite and iron ore and CaO;
(4) schreyerite fine powder material and iron ore fine powder material are mixed by the proportioning that total alkalinity is 2.0 ~ 6.0 with CaO powder respectively, then keep 2 ~ 3min under 15 ~ 16Mpa pressing pressure, make cylindric vanadium titanium-CaO sample and iron-CaO sample respectively; Vanadium titanium-CaO sample and iron-CaO sample are put into high temperature test stove respectively, and Isothermal sinter 4 ~ 5min under 1250 ± 10 DEG C and nitrogen atmosphere condition, then measures the Liquid phase flowability of two kinds of samples respectively respectively;
(5) schreyerite fine powder material and iron ore fine powder material are mixed by the proportioning that total alkalinity is 1.7 ~ 2.7 with CaO powder respectively, then keep 2 ~ 3min under 15 ~ 16Mpa pressing pressure, make cylindric vanadium titanium-CaO sample to be sintered and iron-CaO sample to be sintered respectively; Vanadium titanium-CaO sample to be sintered and iron-CaO sample to be sintered are put into high temperature test stove respectively, Isothermal sinter 4 ~ 5min under 1280 ± 10 DEG C and nitrogen atmosphere condition respectively, be prepared into vanadium titanium-CaO respectively and sinter rear sample and the rear sample of iron-CaO sintering, adopt pressing machine to measure the ultimate compression strength of two kinds of rear samples of sintering after cooling respectively, be the binder strength of powdered iron ore and magnetite powder;
(6) vanadium titanium sample and iron ore sample are put into high temperature test stove respectively, Isothermal sinter 4 ~ 5min under 1280 ± 10 DEG C and nitrogen atmosphere condition, to be prepared into after vanadium titanium sintering sample after sample and agglomeration for iron mine respectively, under pressing machine, measure the ultimate compression strength of two kinds of rear samples of sintering after cooling respectively, be the crystal stock intensity of powdered iron ore and magnetite powder;
(7) anabolic, Liquid phase flowability, the binder strength containing chromium type sefstromite powder and powdered iron ore and crystal stock intensity data storehouse is set up;
(8) nondimensionalization process is carried out to data;
(9) by above-mentioned database, for the one or more poor characteristic containing chromium type vanadium titanium valve, select the good powdered iron ore of this characteristic to carry out complementation with it and join ore deposit, determine that the weight of each index is: liquid phase flow sex index 50%, binder strength 20%, anabolic temperature 20%, crystal stock intensity 10%; Join the weighted index >3 of sample behind ore deposit.
2. raising according to claim 1 is containing the method for chromium type vanadium titanium sintered ore rotary drum strength, it is characterized in that the identical pressing pressure that each step all adopts in a collection of experiment, keeps the identical time; And the equal diameters of schreyerite sample and iron ore sample, iron ore sample is 1:(2 ~ 3 with the diameter ratio of calcium oxide sample).
3. raising according to claim 1 is containing the method for chromium type vanadium titanium sintered ore rotary drum strength, it is characterized in that in described step (7), when minimum assimilation temperature is less than 1200 DEG C, judges that powdered iron ore has high anabolic; When minimum assimilation temperature is within the scope of 1200 ~ 1250 DEG C, judge that powdered iron ore has higher anabolic; When minimum assimilation temperature is within the scope of 1250 ~ 1280 DEG C, judge that powdered iron ore has medium anabolic; When minimum assimilation temperature is greater than 1280 DEG C, judge that powdered iron ore has weak anabolic; Fluidity index is rationally between 0.7 ~ 1.6, and the poor fluidity of sample is described lower than 0.7; It is reasonable that binder strength and crystal stock intensity are greater than 2000N.
4. raising according to claim 1 is containing the method for chromium type vanadium titanium sintered ore rotary drum strength, it is characterized in that in described step (8), nondimensionalization process refers to: setting anabolic temperature <1200 DEG C duration is 5,1200 ~ 1250 DEG C of durations are 4,1250 ~ 1280 DEG C of durations are 3,1280 ~ 1320 DEG C of durations are 2, >1320 DEG C of duration is 1; Setting fluidity index >1.6 duration is 5,1.0 ~ 1.6 durations be 4,0.6 ~ 1.0 duration be 3,0.1 ~ 0.6 duration be 2, <0.1 duration is 1; Setting binder strength >5000N duration is 5,3500 ~ 5000N durations be 4,2000 ~ 3500N durations be 3,1000 ~ 2000N durations be 2, <1000N duration is 1; Setting crystal stock intensity >5000N duration is 5,3500 ~ 5000N durations be 4,2000 ~ 3500N durations be 3,1000 ~ 2000N durations be 2, <1000N duration is 1.
5. raising according to claim 1 is containing the method for chromium type vanadium titanium sintered ore rotary drum strength, it is characterized in that in described step (9), for improving content of vanadium in agglomerate, chooses the proportioning that schreyerite content is maximum when meeting barrate strength requirement; Secondly based on sintering basic characteristic, when improving its intensity to vanadium titanium valve Optimization Ore Matching, first consider general powder Liquid phase flowability, being binder strength and anabolic, is finally crystal stock intensity; By studying the affecting laws of each index to tumbler index.
6. raising according to claim 1 is containing the method for chromium type vanadium titanium sintered ore rotary drum strength, it is characterized in that the described model containing chromium type sefstromite powder is HC, DB, HW, YT, JL and FH, Iron grade TFe, 50.0 ~ 68.0%, contains SiO according to weight percent
23.0 ~ 5.0%, TiO
21.0 ~ 5.0%, Cr
2o
30.1 ~ 1.0%; The model of described powdered iron ore is YD, NF or P, and Iron grade TFe, 54 ~ 65%, contains SiO by weight percentage
24.8 ~ 6.5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410612888.4A CN104388669B (en) | 2014-11-05 | 2014-11-05 | A kind of method improved containing chromium type vanadium titanium sintered ore rotary drum strength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410612888.4A CN104388669B (en) | 2014-11-05 | 2014-11-05 | A kind of method improved containing chromium type vanadium titanium sintered ore rotary drum strength |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104388669A true CN104388669A (en) | 2015-03-04 |
| CN104388669B CN104388669B (en) | 2016-08-17 |
Family
ID=52606625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410612888.4A Active CN104388669B (en) | 2014-11-05 | 2014-11-05 | A kind of method improved containing chromium type vanadium titanium sintered ore rotary drum strength |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104388669B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107326175A (en) * | 2017-07-04 | 2017-11-07 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of method for reducing high-chromic vanadium-titanium ferroferrite sinter mixture fusing point |
| CN107881331A (en) * | 2017-11-19 | 2018-04-06 | 东北大学 | A kind of method that low chromium type vanadium titano-magnetite prepares sintering deposit with addition of common iron ore |
| CN108866324A (en) * | 2018-07-20 | 2018-11-23 | 东北大学 | A method of high-titanium type vanadium-titanium magnetite ore matching is instructed using sintering basic characteristic |
| CN109055732A (en) * | 2018-09-30 | 2018-12-21 | 四川德胜集团钒钛有限公司 | A kind of preparation method of high vanadium titanium ratio sinter |
| CN109752261A (en) * | 2017-11-02 | 2019-05-14 | 上海梅山钢铁股份有限公司 | A method of detection iron ore powder in sintering process binder strength |
| CN112694322A (en) * | 2021-01-28 | 2021-04-23 | 中冶赛迪技术研究中心有限公司 | Sintered body, preparation method thereof and characterization method of high-temperature spreading behavior |
| CN114067926A (en) * | 2021-11-29 | 2022-02-18 | 武汉钢铁有限公司 | Drum strength prediction method for sintering ore of each material layer of sintering trolley |
| CN114438313A (en) * | 2022-02-23 | 2022-05-06 | 重庆钢铁股份有限公司 | Sintering material and batching method thereof |
| CN115261613A (en) * | 2022-05-26 | 2022-11-01 | 柳州钢铁股份有限公司 | Iron ore powder evaluation and comparison method and sinter raw material selection and sintering method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2492690A1 (en) * | 2011-02-22 | 2012-08-29 | BIOCRATES Life Sciences AG | Method and use of metabolites for the diagnosis of inflammatory brain injury in preterm born infants |
| CN103258130A (en) * | 2013-05-10 | 2013-08-21 | 宋强 | Method for predicting sinter tumbler strength |
| CN103725872A (en) * | 2013-12-20 | 2014-04-16 | 攀钢集团成都钢钒有限公司 | Method for improving drum index of vanadium-titanium magnetite sinter |
-
2014
- 2014-11-05 CN CN201410612888.4A patent/CN104388669B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2492690A1 (en) * | 2011-02-22 | 2012-08-29 | BIOCRATES Life Sciences AG | Method and use of metabolites for the diagnosis of inflammatory brain injury in preterm born infants |
| CN103258130A (en) * | 2013-05-10 | 2013-08-21 | 宋强 | Method for predicting sinter tumbler strength |
| CN103725872A (en) * | 2013-12-20 | 2014-04-16 | 攀钢集团成都钢钒有限公司 | Method for improving drum index of vanadium-titanium magnetite sinter |
Non-Patent Citations (1)
| Title |
|---|
| 张勇等: "进口高铬型钒钛磁铁的烧结基础特性", 《钢铁》, vol. 47, no. 12, 31 December 2012 (2012-12-31), pages 19 - 23 * |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107326175B (en) * | 2017-07-04 | 2019-05-28 | 攀钢集团攀枝花钢铁研究院有限公司 | A method of reducing high-chromic vanadium-titanium ferroferrite sinter mixture fusing point |
| CN107326175A (en) * | 2017-07-04 | 2017-11-07 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of method for reducing high-chromic vanadium-titanium ferroferrite sinter mixture fusing point |
| CN109752261B (en) * | 2017-11-02 | 2021-05-07 | 上海梅山钢铁股份有限公司 | Method for detecting strength of iron ore powder binding phase in sintering process |
| CN109752261A (en) * | 2017-11-02 | 2019-05-14 | 上海梅山钢铁股份有限公司 | A method of detection iron ore powder in sintering process binder strength |
| CN107881331A (en) * | 2017-11-19 | 2018-04-06 | 东北大学 | A kind of method that low chromium type vanadium titano-magnetite prepares sintering deposit with addition of common iron ore |
| CN108866324A (en) * | 2018-07-20 | 2018-11-23 | 东北大学 | A method of high-titanium type vanadium-titanium magnetite ore matching is instructed using sintering basic characteristic |
| CN109055732A (en) * | 2018-09-30 | 2018-12-21 | 四川德胜集团钒钛有限公司 | A kind of preparation method of high vanadium titanium ratio sinter |
| CN112694322A (en) * | 2021-01-28 | 2021-04-23 | 中冶赛迪技术研究中心有限公司 | Sintered body, preparation method thereof and characterization method of high-temperature spreading behavior |
| CN112694322B (en) * | 2021-01-28 | 2023-11-10 | 中冶赛迪技术研究中心有限公司 | Sintered body, preparation method thereof and characterization method of high-temperature spreading behavior |
| CN114067926A (en) * | 2021-11-29 | 2022-02-18 | 武汉钢铁有限公司 | Drum strength prediction method for sintering ore of each material layer of sintering trolley |
| CN114438313A (en) * | 2022-02-23 | 2022-05-06 | 重庆钢铁股份有限公司 | Sintering material and batching method thereof |
| CN114438313B (en) * | 2022-02-23 | 2023-06-27 | 重庆钢铁股份有限公司 | Sintering material and material mixing method thereof |
| CN115261613A (en) * | 2022-05-26 | 2022-11-01 | 柳州钢铁股份有限公司 | Iron ore powder evaluation and comparison method and sinter raw material selection and sintering method |
| CN115261613B (en) * | 2022-05-26 | 2023-11-28 | 柳州钢铁股份有限公司 | Iron ore powder evaluation and comparison method, sinter raw material selection and sintering method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104388669B (en) | 2016-08-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104388669A (en) | Method for improving drum strength of chromium-containing vanadium-titanium sinter | |
| CN102127636B (en) | Method for preparing low-SiO2 high-performance sinter ore | |
| CN104630449B (en) | Method for preparing sintered ore by using high-chromium-type vanadium-titanium mixture | |
| CN101701770B (en) | Blast furnace first slag experiment method and first slag experimental furnace | |
| CN101608261A (en) | The method of producing high carbon ferro-chrome by using chromite powder | |
| CN103667686B (en) | A kind of sinter mixture and application | |
| CN105925740A (en) | Optimization method of converter fly ash for blast furnace blowing | |
| CN107101898A (en) | A kind of method for determining Sinter strength characteristic number | |
| CN108133106B (en) | Method for estimating moisture content of sintering machine mixture according to water addition amount | |
| CN104894367A (en) | Sintering technology for acidic pellet ore and alkaline material mixed ultra-thick material layer | |
| CN101726510A (en) | Visual pellet ore reduction swellability measurement method and device | |
| CN109652643A (en) | High quality sinter and preparation method thereof for COREX ironmaking technique of fusion and reduction | |
| Zhu et al. | Co-benefits of CO2 emission reduction and sintering performance improvement of limonitic laterite via hot exhaust-gas recirculation sintering | |
| CN106119533A (en) | The preparation method of red mud carbonaceous pelletizing and preparation system | |
| CN201561645U (en) | First slag experimental furnace | |
| CN108866324A (en) | A method of high-titanium type vanadium-titanium magnetite ore matching is instructed using sintering basic characteristic | |
| CN102213659A (en) | Method for researching sintering performance of iron ore by utilizing mini-sintering test | |
| CN102373332A (en) | Ultra-micro magnesium carbonate pellet additive, preparation method thereof, and application thereof | |
| CN205352043U (en) | Be used for reductive rotary kiln in laterite -nickel ore ore deposit | |
| CN104328276B (en) | The control method of solid fuel, Apparatus and system in a kind of sintering process | |
| Zhou et al. | Optimizing Iron Ore Proportion Aimed for Low Cost by Linear Programming Method | |
| CN202973836U (en) | Rotary kiln for producing ferronickel from Indonesia Sulawesi nickel laterite ore through RKEF (rotary kiln-electric furnace) technical processing | |
| CN102230077A (en) | Mixture for producing sintering ores | |
| CN102912048A (en) | Method and device for improving reduction efficiency of furnace stack by using high-reactivity coke | |
| CN103045280B (en) | Pulverized Anthracite modifying agent and coal blending and coking method using same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180608 Address after: 067201 South horse circle village, North horse circle Town, yingyingyingzi mining area, Chengde, Hebei Patentee after: Chengde Yan Bei Metallurgical Material Co., Ltd. Address before: 110819 No. 3 lane, Heping Road, Heping District, Shenyang, Liaoning 11 Patentee before: Northeastern University |
|
| TR01 | Transfer of patent right |