CN104911338B - A kind of raw materials for sintering composition and acid vanadium titanium sintering deposit and its preparation method and application - Google Patents
A kind of raw materials for sintering composition and acid vanadium titanium sintering deposit and its preparation method and application Download PDFInfo
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Abstract
The present invention relates to the technical field of vanadic-titanomagnetite sintering, a kind of raw materials for sintering composition and acid vanadium titanium sintering deposit and its preparation method and application are disclosed.The raw materials for sintering composition contains sea sand v-ti magnetite concentrate powder, bentonite and fuel, on the basis of the gross weight of the raw materials for sintering composition, the content of the sea sand v-ti magnetite concentrate powder is 91.5 92.5 weight %, the bentonitic content is 1.5 2.5 weight %, and the content of the fuel is 5.5 6.5 weight %.The preparation method of the acid vanadium titanium sintering deposit includes：(1) by above-mentioned raw materials for sintering composition, return mine with water carry out mixing system material, obtain compound；Step (1) described compound is carried out into cloth and sintering successively.The property indices of the acid vanadium titanium sintering deposit that the present invention is provided are more excellent, and disclosure satisfy that blast furnace process furnace retaining sintering deposit enters stove performance requirement, and the long service life to blast furnace is significant.
Description
Technical field
The present invention relates to the technical field of vanadic-titanomagnetite sintering, in particular it relates to a kind of raw materials for sintering composition, acidity
The preparation method of vanadium titanium sintering deposit, the acid vanadium titanium sintering deposit prepared by the method and the acid vanadium titanium sintering deposit conduct
Application of the furnace retaining sintering deposit in blast furnace process.
Background technology
All the time, the long service life of blast furnace is all the target of ironmaking worker unremitting effort and pursuit, and schreyerite maintenance
Technology also has been widely recognized.At present, three kinds of methods that titanium ore furnace retaining technology is usually taken are：Blast-furnace tuyere region is online
Line feeding；Vanadium titanium lump ore or vanadium-titanium pellet are added in blast furnace feeding material；Match somebody with somebody according to certain when sintering mixes stockpile material
Contain perovskite powder than addition.
However, the subject matter that above-mentioned three kinds of titanium ore furnace retainings technology is present has：The first furnace retaining method disposably puts into
This is larger, and equipment is complicated, and this furnace retaining method effect is best in theory, but due to that well can not arrive titanium valve high fixed point dispensing
Hearth erosion region, therefore this furnace retaining method effect is least obvious in production practices.Second furnace retaining method uses titaniferous block
Ore deposit or titaniferous pelletizing carry out furnace retaining, but because titaniferous lump ore and titaniferous pelletizing price are universal higher, therefore use this shield
Stove method cost highest.The third furnace retaining method uses titaniferous fine ore, and price is relatively cheap, and cost is relatively low, and method is handle
Titaniferous fine ore and other ferrous materials are mixed together, are formed sintering and are mixed material, and in actual production, a pile mixes material number
Ten thousand tons, it is available for SINTERING PRODUCTION continuously to use 10 days or so, that is to say, that before heap mixing material is finished, if blast furnace requirement is faced
[Ti] content in Shi Bianhuan raw materials is relatively difficult, therefore the method, for blast fumance, flexibility is not good.
In view of the shortcomings of the prior art, it is badly in need of a kind of simple preparation method of exploitation, low production cost and disclosure satisfy that height
The vanadium titanium furnace retaining sintering deposit for entering stove performance requirement of stove smelting furnace retaining sintering deposit.
The content of the invention
It is an object of the invention to solve the above mentioned problem of prior art, and provide a kind of raw materials for sintering composition, acidity
The preparation method of vanadium titanium sintering deposit, the acid vanadium titanium sintering deposit prepared by the method and the acid vanadium titanium sintering deposit conduct
Application of the furnace retaining sintering deposit in blast furnace process.
To achieve these goals, the invention provides a kind of raw materials for sintering composition, wherein, the raw materials for sintering composition
Contain sea sand v-ti magnetite concentrate powder, bentonite and fuel, on the basis of the gross weight of the raw materials for sintering composition, the sea
The content of sand v-ti magnetite concentrate powder is 91.5-92.5 weight %, and the bentonitic content is 1.5-2.5 weight %, described
The content of fuel is 5.5-6.5 weight %.
Additionally, present invention also offers a kind of preparation method of acid vanadium titanium sintering deposit, the method includes：
(1) by above-mentioned raw materials for sintering composition, return mine with water carry out mixing system material, obtain compound；
(2) step (1) described compound is carried out into cloth and sintering successively.
Present invention also offers a kind of acid vanadium titanium sintering deposit prepared by the above method.
Additionally, present invention also offers above-mentioned acid vanadium titanium sintering deposit as furnace retaining sintering deposit in blast furnace process should
With.
By above-mentioned technical proposal, present invention obtains preparation method is simple, low production cost and blast furnace is disclosure satisfy that
The acid vanadium titanium furnace retaining sintering deposit for entering stove performance requirement of smelting furnace retaining sintering deposit.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Specific embodiment
Specific embodiment of the invention is described in detail below.It should be appreciated that described herein specific
Implementation method is merely to illustrate and explain the present invention, and is not intended to limit the invention.
The invention provides a kind of raw materials for sintering composition, wherein, the raw materials for sintering composition contains sea sand v-ti magnetite
Fine ore, bentonite and fuel, on the basis of the gross weight of the raw materials for sintering composition, the sea sand v-ti magnetite concentrate powder
Content be 91.5-92.5 weight %, the bentonitic content is 1.5-2.5 weight %, and the content of the fuel is 5.5-
6.5 weight %.
In the present invention, control sea sand v-ti magnetite concentrate powder proportioning is in the range of 91.5-92.5 weight % and controls
The bentonitic proportioning of system is conducive to controlling the basicity of acid vanadium titanium sintering deposit in 0.15- in the range of 1.5-2.5 weight %
Between 0.25, so as to ensure that the acid vanadium titanium sintering deposit produced disclosure satisfy that blast furnace process to furnace retaining sintering performance index
It is required that.
In the present invention, the sea sand v-ti magnetite concentrate powder can be derived from the sea sand ore deposit of Indonesia and its surrounding area.It is logical
The content of TFe can be able to be 29-31 weights for 57.5-58.5 weight %, FeO content in Chang Suoshu sea sand v-ti magnetite miberal powders
Amount %, TiO2Content can be 12-13 weight % and SiO2Content can be 0.5-1 weight %.
In the present invention, the bentonitic species can be the conventional selection of this area, for example, can be swollen selected from calcium base
At least one in profit soil, sodium bentonite, hydrogen-based bentonite and organobentonite, preferably calcium-base bentonite.Usually, institute
The bentonitic granularity no more than content of 0.074mm is stated in more than 90 weight %, the bentonitic smectite content can be
85-90 weight %.Additionally, it was found by the inventors of the present invention that bentonitic attribute has a significant impact to sintering deposit quality, in order to strong
Change the granulating efficiency of sintering process, increase the bonding phasor of sintering process, so as to be conducive to improving the yield rate and matter of sintering deposit
Amount, preferably described bentonitic colloid index >=300mL/15g, expansion capacity >=15ml/2g, Absorbance ratio-derivative method >=30g/100g, moisture≤
10%.
It was found by the inventors of the present invention that by fuel ratio control in the range of 5.5-6.5 weight %, it is ensured that sintering
Process generates further amounts of FeO, is that sintering deposit can preferably consolidate offer condition, so as to produce high-quality acid vanadium titanium
Sintering deposit.
In the present invention, the species to the fuel is not particularly limited, and what can be commonly used from sintering process is various
Selected in fuel, for example, can be coke powder and/or coal dust.Go out from the angle for further improving acid vanadium titanium sinter quality
Hair, preferably described fuel is coke powder.
The preparation method of the acid vanadium titanium sintering deposit that the present invention is provided is comprised the following steps：
(1) by above-mentioned raw materials for sintering composition, return mine with water carry out mixing system material, obtain compound；
(2) step (1) described compound is carried out into cloth and sintering successively.
There is no particular limitation for the process of present invention mixing system material described to step (1), it is preferable that the mixing system material
Process can include：One dark uniform two is blended grain.Described one dark even method can include raw materials for sintering composition, return
Ore deposit and water mixing 4-5min, wherein, the consumption of the water causes that the water content of the compound of a mixed blending process acquisition is 7-7.5
Weight %, the consumption returned mine is 20-30 weight portions；Described two methods for being blended grain can include mixing a dark even gained
Material and water mixing 3-4min are closed, wherein, the consumption of the water causes that the water content of the compound of two mixed pelletizations acquisitions is
7.5-8 weight %.
It was found by the inventors of the present invention that the condition by rationally controlling the mixing system material, such as control one is drifted along or through uniform
Two conditions for being blended grain, by the moisture control of compound within the above range, can more advantageously control grain in compound
Compound of the degree not less than 3mm is accounted for more than 80 weight %, in this way, the granularmetric composition of compound can be effectively improved, is significantly improved
The gas permeability of sinter mixture, so as to effectively improve the quality of sintering deposit, produces property indices and disclosure satisfy that blast furnace smelting
The acid vanadium titanium furnace retaining sintering deposit for entering stove performance requirement of refining furnace retaining sintering deposit.Additionally, will be returned during mixing system material
The consumption control of ore deposit within the above range, can further improve the quality of sintering deposit.It is described to return mine as finished product acidity vanadium titanium burns
The acid vanadium titanium sintering deposit of the granularity no more than 5mm that knot ore deposit is obtained after screening.
According to the present invention, the process to step (2) described cloth is not particularly limited, and can use this area routine
Cloth process implemented, it is preferable that the cloth cause the bed of material height be 550-600mm.The height control of the bed of material
System can effectively control sintering velocity within the above range, it is possible to reduce mixed carbon comtent using the effect of bed of material auto accumulation heat.
Preferably, the preparation method of acid vanadium titanium sintering deposit of the present invention is additionally included in during the cloth described
Grate-layer material is arranged in compound bottom.In the present invention, the grate-layer material can be the shop fixtures commonly used when this area prepares sintering deposit
Material, under preferable case, the grate-layer material is that the granularity that finished product acidity vanadium titanium sintering deposit is obtained after screening is the acidity of 10-16mm
Vanadium titanium sintering deposit.Additionally, the present invention does not have specific restriction to the height of grate-layer material, it is preferable that the height of the grate-layer material
It is 20-30mm.
Preferably, the preparation method of acid vanadium titanium sintering deposit of the present invention is additionally included in during the cloth to the bed of material
Binder is carried out, so that the heap density of raw materials for sintering rises, raw materials for sintering is in close contact, sintering speed can be effectively reduced
Degree, extends high temperature hold time, makes crystallizable mineral more abundant, improves sintering deposit mineral composition and structure, further improves sintering
The quality of ore deposit.It is preferred that the binder causes that the bed of material depresses 20-40mm.
There is no particular limitation for condition of the present invention to step (2) described sintering, can enter according to conventional sintering condition
Row is implemented.Preferably, the firing temperature of the sintering is 1000-1150 DEG C, and the time of sintering is 40-50min, the negative pressure of sintering
It is 15-18kPa, sintering machine speed is 1.8-2m/min.
Present invention also offers the acid vanadium titanium sintering deposit prepared by the above method.
The drum strength for using the acid vanadium titanium sintering deposit of above method preparation of the present invention is 71-73%, and dual alkalinity is
0.55-0.65, the content of TFe is that 54.5-55.5 weight %, FeO content is 10-12 weight % in the acid vanadium titanium sintering deposit
And TiO2Content be 12-12.5 weight %.
Additionally, present invention also offers above-mentioned acid vanadium titanium sintering deposit as furnace retaining sintering deposit in blast furnace process should
With.
The present invention is further described with reference to embodiments, but the present invention is not limited in following embodiments.
In following examples and comparative example：
Sea sand v-ti magnetite concentrate powder is purchased from Indonesia and its surrounding area, and primary chemical composition is：The content of TFe
For 58.22 weight %, FeO contents are 30.07 weight %, TiO2Content be 12.64 weight % and SiO2Content be 0.73 weight
Amount %；
Bentonite is calcium base boron-moisten soil, and granularity is 91 weight % in the content of below 0.074mm, and smectite content is 87 weights
Amount %, Absorbance ratio-derivative method is 30g/100g, and colloid index is 300mL/15g, and expansion capacity is 18mL/2g, and moisture is 10%；
The carbon content of coke powder is 83.75 weight %, and volatilization is divided into 1.14 weight %, ash content for 12.4 weight %；
The assay method of the intensity of sintering deposit is：Refer to take 7.5 kilograms according to the ISO drum strengths that GB13242 is defined
After 10-40mm sintering deposits rotate 200 turns in ISO drum units, ＞ 6.3mm grade sintering deposits account for the percentage of whole sintering deposit weight
Than, and drum strength is the important indicator for weighing sinter strength, and it is higher, represent that the intensity of sintering deposit is better.In the present invention
It is measured using SQZG-4 type ISO drum units (Hebi City metallurgical machinery equipment Co., Ltd)；
The computational methods of sintering deposit yield rate are：Poured out after sintering deposit is burned, carry out natural cooling, 2 are fallen from 2m eminences
It is secondary, sieved, take the percentage meter yield rate of ＞ 6.3mm grain size contents；
The dual alkalinity computational methods of sintering deposit are：3-4 parts of detection sample is randomly selected from finished product sintering deposit, then will inspection
Test sample is mixed, CaO and SiO in test mixing detection sample2Content, the CaO and SiO for obtaining2The ratio of content is sintering
The dual alkalinity of ore deposit.
Embodiment 1
The present embodiment is used to illustrate acid vanadium titanium sintering deposit of the invention and preparation method thereof.
Sea sand v-ti magnetite concentrate powder, bentonite and coke powder are carried out into dispensing according to the proportioning of table 1, then with return mine and water
Mixing system material (including one dark uniform two be blended grain) is carried out, wherein, return mine with the consumption of water as shown in table 1, compound is obtained,
The water content of compound is 7.5 weight %, and compound of the granularity not less than 3mm is accounted for more than 65 weight % in compound.
Arrangement height first is the grate-layer material of 25mm, and above-mentioned compound then is carried out into cloth using magnetic roller distributing device, and
Binder (control bed of material pressure 30mm) is carried out, so that bed depth is 570mm, compound is then added to drying grate length
To be sintered on the chassis of 80m, (sintering machine area is 360m2), the firing temperature for setting sintering is 1050 DEG C, sintering it is negative
It is 17kPa to press, and sintering machine speed is 1.9m/min.
Obtain acid vanadium titanium sintering deposit X1, its dual alkalinity, drum strength, yield rate, productivity of sintering machine and acid
TFe, FeO, TiO in property vanadium titanium sintering deposit X12The test result of content is as shown in table 1.
Embodiment 2
The present embodiment is used to illustrate acid vanadium titanium sintering deposit of the invention and preparation method thereof.
Sea sand v-ti magnetite concentrate powder, bentonite and coke powder are carried out into dispensing according to the proportioning of table 1, then with return mine and water
Mixing system material (including one dark uniform two be blended grain) is carried out, wherein, return mine with the consumption of water as shown in table 1, compound is obtained,
The water content of compound is 8 weight %, and compound of the granularity not less than 3mm is accounted for more than 70 weight % in compound.
Arrangement height first is the grate-layer material of 30mm, and above-mentioned compound then is carried out into cloth using magnetic roller distributing device, and
Binder (control bed of material pressure 40mm) is carried out, so that bed depth is 600mm, compound is then added to drying grate length
To be sintered on the chassis of 80m, (sintering machine area is 360m2), the firing temperature for setting sintering is 1000 DEG C, sintering it is negative
It is 18kPa to press, and sintering machine speed is 1.8m/min.
Obtain acid vanadium titanium sintering deposit X2, its dual alkalinity, drum strength, yield rate, productivity of sintering machine and acid
TFe, FeO, TiO in property vanadium titanium sintering deposit X22The test result of content is as shown in table 1.
Embodiment 3
The present embodiment is used to illustrate acid vanadium titanium sintering deposit of the invention and preparation method thereof.
Sea sand v-ti magnetite concentrate powder, bentonite and coke powder are carried out into dispensing according to the proportioning of table 1, then with return mine and water
Mixing system material (including one dark uniform two be blended grain) is carried out, wherein, return mine with the consumption of water as shown in table 1, compound is obtained,
The water content of compound is 7.8 weight %, and compound of the granularity not less than 3mm is accounted for more than 68 weight % in compound.
Arrangement height first is the grate-layer material of 20mm, and above-mentioned compound then is carried out into cloth using magnetic roller distributing device, and
Binder (control bed of material pressure 20mm) is carried out, so that bed depth is 550mm, compound is then added to drying grate length
To be sintered on the chassis of 80m, (area of sintering machine is 360m2), 1150 DEG C of the firing temperature of sintering is set, sintering it is negative
It is 15kPa to press, and sintering machine speed is 2.0m/min.
Obtain acid vanadium titanium sintering deposit X3, its dual alkalinity, drum strength, yield rate, productivity of sintering machine and acid
TFe, FeO, TiO in property vanadium titanium sintering deposit X32The test result of content is as shown in table 1.
Embodiment 4
The present embodiment is used to illustrate acid vanadium titanium sintering deposit of the invention and preparation method thereof.
Acid vanadium titanium sintering deposit is prepared according to the method for embodiment 1, except that, the consumption of the water causes the mixing
The water content of material is 9 weight %, obtains acid vanadium titanium sintering deposit X4, its dual alkalinity, drum strength, yield rate, sintering machine profit
With TFe, FeO, TiO in coefficient and acid vanadium titanium sintering deposit X42The test result of content is as shown in table 1.
Embodiment 5
The present embodiment is used to illustrate acid vanadium titanium sintering deposit of the invention and preparation method thereof.
Acid vanadium titanium sintering deposit is prepared according to the method for embodiment 1, except that, relative to the burning of 100 weight portions
Knot feedstock composition, the consumption returned mine is 10 weight portions, obtains acid vanadium titanium sintering deposit X5, and its dual alkalinity, rotary drum are strong
Degree, yield rate, productivity of sintering machine and TFe, FeO, TiO in acid vanadium titanium sintering deposit X52The test result of content such as table 1
It is shown.
Embodiment 6
The present embodiment is used to illustrate acid vanadium titanium sintering deposit of the invention and preparation method thereof.
Acid vanadium titanium sintering deposit is prepared according to the method for embodiment 1, except that, the vacuum cavitations of sintering are 10kPa, are obtained
To acid vanadium titanium sintering deposit X6, its dual alkalinity, drum strength, yield rate, productivity of sintering machine and acid vanadium titanium sintering
TFe, FeO, TiO in ore deposit X62The test result of content is as shown in table 1.
Embodiment 7
The present embodiment is used to illustrate acid vanadium titanium sintering deposit of the invention and preparation method thereof.
Acid vanadium titanium sintering deposit is prepared according to the method for embodiment 1, except that, sintering machine machine speed is controlled to 2.5m/
Min, obtains acid vanadium titanium sintering deposit X7, its dual alkalinity, drum strength, yield rate, productivity of sintering machine and acid vanadium
TFe, FeO, TiO in titanium sintering deposit X72The test result of content is as shown in table 1.
Comparative example 1
The comparative example is used to illustrate acid vanadium titanium sintering deposit of reference and preparation method thereof.
Acid vanadium titanium sintering deposit is prepared according to the method for embodiment 1, except that, the sea sand v-ti magnetite concentrate powder,
Bentonite and coke powder carry out dispensing according to the proportioning of table 1, obtain acid vanadium titanium sintering deposit D1, its dual alkalinity, drum strength, into
Product rate, productivity of sintering machine and TFe, FeO, TiO in acid vanadium titanium sintering deposit D12The test result of content is as shown in table 1.
Table 1
The property indices that the acid vanadium titanium sintering deposit of present invention offer is can be seen that from the data result of table 1 are more excellent,
Disclosure satisfy that blast furnace process furnace retaining sintering deposit enters stove performance requirement, alternative blast furnace process furnace retaining titaniferous pellet, contains
Titanium lump ore and with Ti-containing slag etc., the long service life to blast furnace is significant.
The preferred embodiment of the present invention described in detail above, but, the present invention is not limited in above-mentioned implementation method
Detail, in range of the technology design of the invention, various simple variants can be carried out to technical scheme, this
A little simple variants belong to protection scope of the present invention.
Claims (8)
1. a kind of preparation method of acid vanadium titanium sintering deposit, it is characterised in that the method includes：
(1) by raw materials for sintering composition, return mine with water carry out mixing system material, obtain compound；
(2) step (1) described compound is carried out into cloth and sintering successively；
Wherein, the raw materials for sintering composition contains sea sand v-ti magnetite concentrate powder, bentonite and fuel, with the raw materials for sintering
On the basis of the gross weight of composition, the content of the sea sand v-ti magnetite concentrate powder is 91.5-92.5 weight %, the bentonite
Content be 1.5-2.5 weight %, the content of the fuel is 5.5-6.5 weight %, wherein, the sea sand v-ti magnetite concentrate
The content of TFe is that 57.5-58.5 weight %, FeO content are 29-31 weight %, TiO in powder2Content for 12-13 weight % and
SiO2Content be 0.5-1 weight %；
In step (1), the consumption of the water causes that the water content of the compound is 7.5-8 weight %；
In step (1), relative to the raw materials for sintering composition of 100 weight portions, the consumption returned mine is 20-30 weight
Part.
2. method according to claim 1, wherein, the bentonitic colloid index >=300mL/15g, expansion capacity >=
15ml/2g, Absorbance ratio-derivative method >=30g/100g, moisture≤10%.
3. method according to claim 1 and 2, wherein, the mixing system material causes granularity in compound not less than 3mm
Compound is accounted for more than 60 weight %.
4. method according to claim 1 and 2, wherein, in step (2), the cloth causes that bed depth is 550-
600mm。
5. method according to claim 1 and 2, wherein, in step (2), the firing temperature of the sintering is 1000-
1150 DEG C, the negative pressure of sintering is 15-18kPa, and sintering machine speed is 1.8-2m/min.
6. the acid vanadium titanium sintering deposit that the method as described in any one in claim 1-5 is prepared.
7. acid vanadium titanium sintering deposit according to claim 6, wherein, the drum strength of the acid vanadium titanium sintering deposit is
71-73%, dual alkalinity is 0.55-0.65, in the acid vanadium titanium sintering deposit content of TFe be 54.5-55.5 weight %,
FeO contents are 10-12 weight % and TiO2Content be 12-12.5 weight %.
8. application of the acid vanadium titanium sintering deposit described in claim 6 or 7 as furnace retaining sintering deposit in blast furnace process.
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