CN108754133A - A kind of high titanium solvent borne pelletizing of high chromium and the preparation method and application thereof - Google Patents
A kind of high titanium solvent borne pelletizing of high chromium and the preparation method and application thereof Download PDFInfo
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- CN108754133A CN108754133A CN201810616226.2A CN201810616226A CN108754133A CN 108754133 A CN108754133 A CN 108754133A CN 201810616226 A CN201810616226 A CN 201810616226A CN 108754133 A CN108754133 A CN 108754133A
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- pelletizing
- chromium
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- ball
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
- C22B1/243—Binding; Briquetting ; Granulating with binders inorganic
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
Abstract
The present invention relates to ironmaking technology fields, provide a kind of preparation method of the high titanium solvent borne pelletizing of high chromium, include the following steps：Manufacture raw material is uniformly mixed and obtains mixed pelletizing material, the manufacture raw material is counted in parts by weight, includes 95~98.4 parts of the high ilmenite concentrate of high chromium, 1.6~3 parts of active lime and 1.5~2.3 parts of bentonite；The mixed pelletizing material is fabricated to the green-ball that agglomerate particle size is 8~16mm, moisture is 8~9%；The green-ball is dried to obtain the high titanium solvent borne pelletizing of high chromium.This method can improve the problem of high ilmenite concentrate of high chromium is directly used in blast furnace ironmaking low output.The present invention also provides a kind of high titanium solvent borne pelletizings of the high chromium of high temperature, are made using the preparation method of the above-mentioned high titanium solvent borne pelletizing of high chromium, and the pelletizing compression strength is high, high for blast furnace ironmaking yield.It is application of the raw material in ironmaking the present invention also provides the high titanium solvent borne pelletizing of the high chromium of above-mentioned high temperature.
Description
Technical field
The present invention relates to ironmaking technology fields, in particular to a kind of preparation method of the high high titanium solvent borne pelletizing of chromium
With application.
Background technology
Iron ore species are various, it has been found that iron mineral and iron-bearing mineral about more than 300 plant.And it is wanted in our production and living
The ironwork used is to smelt to obtain by iron ore processing, and the use of iron can be described as our production and living and its again
It wants.
China has the high ilmenite concentrate of high chromium compared with horn of plenty, but the iron ore is directly used in blast furnace ironmaking low output.
In consideration of it, special propose the application.
Invention content
The present invention provides a kind of preparation methods of the high high titanium solvent borne pelletizing of chromium, it is intended to it is direct to improve the high ilmenite concentrate of high chromium
The problem of for blast furnace ironmaking low output.
The present invention also provides a kind of high high titanium solvent borne pelletizings of chromium, and the pelletizing compression strength is high, is produced for blast furnace ironmaking
Amount is high.
The high titanium solvent borne pelletizing crop raw material of high chromium provided by the invention are for that when smelting iron, can improve furnace processor.
The invention is realized in this way：
A kind of preparation method of the high titanium solvent borne pelletizing of high chromium, includes the following steps：
Manufacture raw material is uniformly mixed and obtains mixed pelletizing material, manufacture raw material is counted in parts by weight, including 95~98.4 parts
The high ilmenite concentrate of high chromium, 1.6~3 parts of active lime and 1.5~2.3 parts of bentonite；Mixed pelletizing material is fabricated to group
Grain grain size be 8~16mm, the green-ball that moisture is 8~9%；Green-ball is dried to obtain the high titanium solvent borne pelletizing of high chromium.
A kind of high titanium solvent borne pelletizing of the high chromium of high temperature, using the preparation method system of the above-mentioned high titanium solvent borne pelletizing of high chromium
?.
Application of the high titanium solvent borne pelletizing of the high chromium of above-mentioned high temperature as raw material in ironmaking.
The beneficial effects of the invention are as follows：The preparation side that the present invention passes through the high titanium solvent borne pelletizing of high chromium that above-mentioned design obtains
Method, due to using the high ilmenite concentrate of high chromium as raw material, active lime being used to improve the acid to be made convenient for height of the high ilmenite concentrate of high chromium
The Alkalinous pelletizing of stove reaction improves the blast furnace feeding grade of ore, and then improves furnace processor, adds suitable bentonite and to make
The pelletizing conglobation property obtained is good, and compression strength height meets blast furnace and enters stove requirement, and since each step setting of the present invention is reasonable,
So that the height that main function composition is not lost, and production is made to obtain in the high high ilmenite concentrate of chromium in pelletizing after the present invention makes
The high titanium pelletizing of chromium can be used for refine product containing chromium, and by the high ilmenite concentrate of high chromium be made certain size pelletizing be used for smelt iron, energy
Furnace charge air permeability is improved, and then improves furnace processor.
The present invention is by the high titanium solvent borne pelletizing of high chromium that above-mentioned design obtains, due to high using high chromium provided by the invention
The preparation method of titanium solvent borne pelletizing is made, therefore the high high titanium solvent borne pelletizing compression strength height of chromium meets blast furnace enters stove and want
It asks, and pelletizing is in alkaline feed grade height, so that furnace processor is high, and due to Sizes, energy when as iron-smelting raw material
Furnace charge air permeability is improved, and then improves furnace processor.
The high titanium solvent borne pelletizing crop raw material of high chromium provided by the invention are for that when smelting iron, can improve furnace processor.
Specific implementation mode
It in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described.The person that is not specified actual conditions in embodiment, builds according to normal condition or manufacturer
The condition of view carries out.Reagents or instruments used without specified manufacturer is the conventional production that can be obtained by commercially available purchase
Product.
A kind of preparation method of the high titanium solvent borne pelletizing of high chromium is provided to the embodiment of the present invention below to illustrate.
A kind of preparation method of the high titanium solvent borne pelletizing of high chromium, includes the following steps：
S1, it manufacture raw material is uniformly mixed obtaining mixed pelletizing material, manufacture raw material is counted in parts by weight, including 95~
98.4.4 the high ilmenite concentrate of high chromium, 1.6~3 parts of active lime and 1.5~2.3 parts of bentonites of part.
Specifically, it is manufacture raw material with the high ilmenite concentrate of high chromium and active lime.The high titanium of high chromium that will be transported back first from mining area
Concentrate is placed in baking oven and dries, and drying temperature is 200~300 DEG C, dries 1.5~2.3h so that the high high ilmenite concentrate moisture of chromium contains
Amount is below 2%.By the main purpose of high chromium high ilmenite concentrate drying be the active lime for avoiding subsequently drying and wet concentrate
Uneven components caused by directly digesting when mixing are carried out with bonding phenomenon to occur.
Then the high ilmenite concentrate of high chromium of drying is subjected to mill choosing so that the high high ilmenite concentrate of chromium is in powdery, the high titanium of high chromium of powdery
The grain size of concentrate is in 0.55mm or less.It will be bought from market or the active lime of our factory's production carry out mill choosing so that activity
Lime powdering, and the grain size of the active lime of powdery is in 0.109mm or less.After overground choosing and grain size within the above range
Manufacture raw material can be mutually mixed evenly, and conglobation property is good, and pelletizing compression strength obtained is high.Preferably, to make
The pelletizing material performance obtained is more preferable, and grain size is the Gao Ge that 0.075mm particles below account for powdery in the high ilmenite concentrate of high chromium of powdery
The 75%~100% of high ilmenite concentrate total weight, grain size is the activity that 0.075 particle below accounts for powdery in the active lime of powdery
The 92.5~100% of lime total weight.
It should be noted that in the present invention, after the mill choosing of the high ilmenite concentrate of high chromium and active lime can be mixed with the two
Carry out, reach effect with separate grind select remix it is identical.In the present invention, the mill choosing of the high ilmenite concentrate of high chromium can dried
Before can also be as after above-mentioned drying.
It counts in parts by weight, the high ilmenite concentrate of 95~98.4 parts high chromium, 1.6~3 parts of active limes and 1.5 after mill is selected
~2.3 parts of bentonites are placed in intensive mixer and are thoroughly mixed, and 4~6min of mixing makes the two be mixed
Close pelletizing material.Active lime can neutralize the acidity of the high ilmenite concentrate of high chromium, and make pelletizing obtained in alkalinity, by ball obtained
When group is for smelting iron, it is conducive to the also original production in large blast furnace of smart iron ore, improves ironmaking efficiency and reduce ironmaking cost.Bentonite
As adhesive, balling process can be made to stablize, and the intensity of green-ball can be improved.When it includes bentonite to manufacture raw material, in pelletizing
In manufacturing process, bentonite is mixed together with the high ilmenite concentrate of high chromium and active lime.
S2, mixed pelletizing material is fabricated to the green-ball that agglomerate particle size is 8~16mm, moisture is 8~9%；
By mixed pelletizing material be added disc balling machine in, disc balling machine rotating speed be 22~25r/min, 46 ° of inclination angle~
It is 8%~9% that water content is made under conditions of 51 °, and pelletizing rolls into a ball the green-ball that diameter is 8~16mm.Preferably, the disc balling machine
For 1000 × 350mm of Φ (side is high).
S3, green-ball is dried to obtain the high titanium solvent borne pelletizing of high chromium.
Specifically, green-ball obtained is placed in drying box dry, drying temperature is 150~350 DEG C, and drying time is
1.8~2.2h, pelletizing after must drying.
Pelletizing after drying is placed in Muffle furnace and is preheated, preheating temperature be 750~850 DEG C, preheating time be 15~
25min.Preheating is avoided that directly to be warming up to and bakes temperature, make pelletizing dropped because shock heating made from ripe ball compression strength.Preheating
It is 1200~1300 DEG C that muffle furnace, which is increased, afterwards, bakes 35~50min and obtains the high ripe ball of titanium solvent borne pelletizing of the high chromium of high temperature.
Then the high titanium solvent borne pelletizing natural cooling of the high chromium of high temperature about 5 hours to room temperature is obtained into the high titanium solvent borne ball of high chromium
Group.
Below in conjunction with specific embodiment to a kind of preparation method progress of the high high titanium solvent borne pelletizing of chromium provided by the invention
It illustrates.
The high ilmenite concentrate ingredient of high chromium employed in following present invention embodiment is：ω (TFe) 52.0~55.0%,
ω(SiO2)>3.0%, ω (FeO)>25%, ω (TiO2)>12.0%, ω (Cr2O3)>0.90%；TFe- special irons, refer to and contain
The ferroalloy of other alloying elements.
Ingredient is in active lime：ω(CaO)>85.0%.
Embodiment 1
Present embodiments provide a kind of preparation method of the high titanium solvent borne pelletizing of high chromium and by Gao Ge made from this method
High titanium solvent borne pelletizing.
A kind of high titanium solvent borne pelletizing of high chromium is preparation method, and preparation process includes：
The high ilmenite concentrate of high chromium transported back from mining area is placed in baking oven, dries 1.5h under conditions of 200 DEG C of temperature so that is high
The high ilmenite concentrate water content of chromium is below 2%.Then the high ilmenite concentrate 9840kg of the high chromium after active lime 160kg, drying is weighed
And bentonite 150kg is spare.
In 0.109mm or less and grain size it is that 0.075mm particles below account for powder by high chromium high ilmenite concentrate mill choosing to grain size
The 75% of the high ilmenite concentrate total weight of high chromium of shape；By active lime mill choosing to grain size in 0.109mm hereinafter, and grain size be
0.075 particle below accounts for the 92.5% of the active lime total weight of powdery.The high ilmenite concentrate of the high chromium of powdery after mill selects and work
Property lime be placed in mixing machine and mix 5min both above-mentioned be uniformly mixed is made to obtain mixed pelletizing material.
Mixed pelletizing material is placed in the disc balling machine of 1000 × 350mm of Φ (side is high), disc balling machine rotating speed is set
For 46 ° of 22r/min, inclination angle, the green-ball that obtained moisture is 8%~9% and pelletizing group diameter is 8mm.
The green-ball is placed in drying box, under conditions of temperature is 200 DEG C, pelletizing after 2h must be dried when dry will be done
Pelletizing is placed in Muffle furnace after dry, is started Muffle furnace and is preheated, and preheating temperature is 750 DEG C, preheats 25min, after preheating,
Continue to increase muffle furnace and be baked to 1200 DEG C, the high ripe ball of titanium solvent borne pelletizing of the high chromium of high temperature is obtained after baking 35min,
The ripe ball of high temperature is naturally cooled into room temperature and obtains the high titanium solvent borne pelletizing of high chromium provided in this embodiment.
Embodiment 2
Present embodiments provide a kind of preparation method of the high titanium solvent borne pelletizing of high chromium and by Gao Ge made from this method
High titanium solvent borne pelletizing.
A kind of high titanium solvent borne pelletizing of high chromium is preparation method, and preparation process includes：
The high ilmenite concentrate of high chromium transported back from mining area is placed in baking oven, dries 2.5h under conditions of 300 DEG C of temperature so that is high
The high ilmenite concentrate water content of chromium is below 2%.Then the high ilmenite concentrate 9770kg of the high chromium after active lime 180kg, drying is weighed
And bentonite 150kg is spare.
In 0.109mm or less and grain size it is that 0.075mm particles below account for powder by high chromium high ilmenite concentrate mill choosing to grain size
The 85% of the high ilmenite concentrate total weight of high chromium of shape；By active lime mill choosing to grain size in 0.109mm hereinafter, and grain size be
0.075 particle below accounts for the 95% of the active lime total weight of powdery.The high ilmenite concentrate of the high chromium of powdery after mill selects and activity
Lime is placed in mixing 4min in mixing machine and both above-mentioned be uniformly mixed is made to obtain mixed pelletizing material.
Mixed pelletizing material is placed in the disc balling machine of 1000 × 350mm of Φ (side is high), disc balling machine rotating speed is set
For 51 ° of 25r/min, inclination angle, the green-ball that obtained moisture is 8%~9% and pelletizing group diameter is 16mm.
The green-ball is placed in drying box, under conditions of temperature is 350 DEG C, pelletizing after 1.8h must be dried when dry will
Pelletizing is placed in Muffle furnace after drying, is started Muffle furnace and is preheated, and preheating temperature is 850 DEG C, preheats 15min, and preheating terminates
Afterwards, continue to increase muffle furnace and be baked to 1300 DEG C, bake that obtain the high titanium solvent borne pelletizing of the high chromium of high temperature after 50min ripe
The ripe ball of high temperature is naturally cooled to room temperature and obtains the high titanium solvent borne pelletizing of high chromium provided in this embodiment by ball.
Embodiment 3
Present embodiments provide a kind of preparation method of the high titanium solvent borne pelletizing of high chromium and by Gao Ge made from this method
High titanium solvent borne pelletizing.
A kind of high titanium solvent borne pelletizing of high chromium is preparation method, and preparation process includes：
The high ilmenite concentrate of high chromium transported back from mining area is placed in baking oven, dries 2h under conditions of 250 DEG C of temperature so that Gao Ge
High ilmenite concentrate water content is below 2%.Then weigh the high ilmenite concentrate 9710kg of the high chromium after active lime 190kg, drying with
And bentonite 150kg is spare.
In 0.109mm or less and grain size it is that 0.075mm particles below account for powder by high chromium high ilmenite concentrate mill choosing to grain size
The 95% of the high ilmenite concentrate total weight of high chromium of shape；By active lime mill choosing to grain size in 0.109mm hereinafter, and grain size be
0.075 particle below accounts for the 97% of the active lime total weight of powdery.The high ilmenite concentrate of the high chromium of powdery after mill selects and activity
Lime is placed in mixing 6min in mixing machine and both above-mentioned be uniformly mixed is made to obtain mixed pelletizing material.
Mixed pelletizing material is placed in the disc balling machine of 1000 × 350mm of Φ (side is high), disc balling machine rotating speed is set
For 48 ° of 23r/min, inclination angle, the green-ball that obtained moisture is 8%~9% and pelletizing group diameter is 10mm.
The green-ball is placed in drying box, under conditions of temperature is 150 DEG C, pelletizing after 2.2h must be dried when dry will
Pelletizing is placed in Muffle furnace after drying, is started Muffle furnace and is preheated, and preheating temperature is 800 DEG C, preheats 20min, and preheating terminates
Afterwards, continue to increase muffle furnace and be baked to 1250 DEG C, bake that obtain the high titanium solvent borne pelletizing of the high chromium of high temperature after 40min ripe
The ripe ball of high temperature is naturally cooled to room temperature and obtains the high titanium solvent borne pelletizing of high chromium provided in this embodiment by ball.
Embodiment 4
Present embodiments provide a kind of preparation method of the high titanium solvent borne pelletizing of high chromium and by Gao Ge made from this method
High titanium solvent borne pelletizing.
A kind of high titanium solvent borne pelletizing of high chromium is preparation method, and preparation process includes：
The high ilmenite concentrate of high chromium transported back from mining area is placed in baking oven, dries 1.8h under conditions of 230 DEG C of temperature so that is high
The high ilmenite concentrate water content of chromium is below 2%.Then the high ilmenite concentrate 9840kg of the high chromium after active lime 160kg, drying is weighed
And bentonite 150kg is spare.
In 0.109mm or less and grain size it is that 0.075mm particles below account for powder by high chromium high ilmenite concentrate mill choosing to grain size
The 100% of the high ilmenite concentrate total weight of high chromium of shape；By active lime mill choosing to grain size in 0.109mm hereinafter, and grain size be
0.075 particle below accounts for the 99% of the active lime total weight of powdery.The high ilmenite concentrate of the high chromium of powdery after mill selects and activity
Lime is placed in mixing 4min in mixing machine and both above-mentioned be uniformly mixed is made to obtain mixed pelletizing material.
Mixed pelletizing material is placed in the disc balling machine of 1000 × 350mm of Φ (side is high), disc balling machine rotating speed is set
For 49 ° of 24r/min, inclination angle, the green-ball that obtained moisture is 8%~9% and pelletizing group diameter is 12mm.
The green-ball is placed in drying box, under conditions of temperature is 300 DEG C, pelletizing after 2.1h must be dried when dry will
Pelletizing is placed in Muffle furnace after drying, is started Muffle furnace and is preheated, and preheating temperature is 780 DEG C, preheats 22min, and preheating terminates
Afterwards, continue to increase muffle furnace and be baked to 1280 DEG C, bake that obtain the high titanium solvent borne pelletizing of the high chromium of high temperature after 42min ripe
The ripe ball of high temperature is naturally cooled to room temperature and obtains the high titanium solvent borne pelletizing of high chromium provided in this embodiment by ball.
Embodiment 5
Present embodiments provide a kind of preparation method of the high titanium solvent borne pelletizing of high chromium and by Gao Ge made from this method
High titanium solvent borne pelletizing.
A kind of high titanium solvent borne pelletizing of high chromium is preparation method, and preparation process includes：
The high ilmenite concentrate of high chromium transported back from mining area is placed in baking oven, dries 1.5h under conditions of 200 DEG C of temperature so that is high
The high ilmenite concentrate water content of chromium is below 2%.Then the high ilmenite concentrate 9580kg of the high chromium after active lime 220kg, drying is weighed
And bentonite 200kg is spare.
In 0.109mm or less and grain size it is that 0.075mm particles below account for powder by high chromium high ilmenite concentrate mill choosing to grain size
The 78% of the high ilmenite concentrate total weight of high chromium of shape；By active lime mill choosing to grain size in 0.109mm hereinafter, and grain size be
0.075 particle below accounts for the 100% of the active lime total weight of powdery.The high ilmenite concentrate of the high chromium of powdery after mill selects and activity
Lime is placed in mixing 5min in mixing machine and both above-mentioned be uniformly mixed is made to obtain mixed pelletizing material.
Mixed pelletizing material is placed in the disc balling machine of 1000 × 350mm of Φ (side is high), disc balling machine rotating speed is set
For 50 ° of 22r/min, inclination angle, the green-ball that obtained moisture is 8%~9% and pelletizing group diameter is 14mm.
The green-ball is placed in drying box, under conditions of temperature is 320 DEG C, pelletizing after 1.9h must be dried when dry will
Pelletizing is placed in Muffle furnace after drying, is started Muffle furnace and is preheated, and preheating temperature is 840 DEG C, preheats 22min, and preheating terminates
Afterwards, continue to increase muffle furnace and be baked to 1290 DEG C, bake that obtain the high titanium solvent borne pelletizing of the high chromium of high temperature after 42min ripe
The ripe ball of high temperature is naturally cooled to room temperature and obtains the high titanium solvent borne pelletizing of high chromium provided in this embodiment by ball.
Embodiment 6
Present embodiments provide a kind of preparation method of the high titanium solvent borne pelletizing of high chromium and by Gao Ge made from this method
High titanium solvent borne pelletizing.
A kind of high titanium solvent borne pelletizing of high chromium is preparation method, and preparation process includes：
The high ilmenite concentrate of high chromium transported back from mining area is placed in baking oven, dries 1.5h under conditions of 200 DEG C of temperature so that is high
The high ilmenite concentrate water content of chromium is below 2%.Then the high ilmenite concentrate 9500kg of the high chromium after active lime 300kg, drying is weighed
And bentonite 200kg is spare.
In 0.109mm or less and grain size it is that 0.075mm particles below account for powder by high chromium high ilmenite concentrate mill choosing to grain size
The 80% of the high ilmenite concentrate total weight of high chromium of shape；By active lime mill choosing to grain size in 0.109mm hereinafter, and grain size be
0.075 particle below accounts for the 94% of the active lime total weight of powdery.The high ilmenite concentrate of the high chromium of powdery after mill selects and activity
Lime is placed in mixing 4min in mixing machine and both above-mentioned be uniformly mixed is made to obtain mixed pelletizing material.
Mixed pelletizing material is placed in the disc balling machine of 1000 × 350mm of Φ (side is high), disc balling machine rotating speed is set
For 48 ° of 24r/min, inclination angle, the green-ball that obtained moisture is 8%~9% and pelletizing group diameter is 15mm.
The green-ball is placed in drying box, under conditions of temperature is 210 DEG C, pelletizing after 1.9h must be dried when dry will
Pelletizing is placed in Muffle furnace after drying, is started Muffle furnace and is preheated, and preheating temperature is 780 DEG C, preheats 17min, and preheating terminates
Afterwards, continue to increase muffle furnace and be baked to 1260 DEG C, bake that obtain the high titanium solvent borne pelletizing of the high chromium of high temperature after 38min ripe
The ripe ball of high temperature is naturally cooled to room temperature and obtains the high titanium solvent borne pelletizing of high chromium provided in this embodiment by ball.
Embodiment 7
Present embodiments provide a kind of preparation method of the high titanium solvent borne pelletizing of high chromium and by Gao Ge made from this method
High titanium solvent borne pelletizing.
A kind of high titanium solvent borne pelletizing of high chromium is preparation method, and preparation process includes：
The high ilmenite concentrate of high chromium transported back from mining area is placed in baking oven, dries 1.5h under conditions of 200 DEG C of temperature so that is high
The high ilmenite concentrate water content of chromium is below 2%.Then the high ilmenite concentrate 9600kg of the high chromium after active lime 210kg, drying is weighed
And bentonite 220kg is spare.
In 0.109mm or less and grain size it is that 0.075mm particles below account for powder by high chromium high ilmenite concentrate mill choosing to grain size
The 85% of the high ilmenite concentrate total weight of high chromium of shape；By active lime mill choosing to grain size in 0.109mm hereinafter, and grain size be
0.075 particle below accounts for the 93% of the active lime total weight of powdery.The high ilmenite concentrate of the high chromium of powdery after mill selects and activity
Lime is placed in mixing 4min in mixing machine and both above-mentioned be uniformly mixed is made to obtain mixed pelletizing material.
Mixed pelletizing material is placed in the disc balling machine of 1000 × 350mm of Φ (side is high), disc balling machine rotating speed is set
For 48 ° of 24r/min, inclination angle, the green-ball that obtained moisture is 8%~9% and pelletizing group diameter is 15mm.
The green-ball is placed in drying box, under conditions of temperature is 200 DEG C, pelletizing after 2h must be dried when dry will be done
Pelletizing is placed in Muffle furnace after dry, is started Muffle furnace and is preheated, and preheating temperature is 830 DEG C, preheats 25min, after preheating,
Continue to increase muffle furnace and be baked to 1250 DEG C, the high ripe ball of titanium solvent borne pelletizing of the high chromium of high temperature is obtained after baking 35min,
The ripe ball of high temperature is naturally cooled into room temperature and obtains the high titanium solvent borne pelletizing of high chromium provided in this embodiment.
Embodiment 8
Present embodiments provide a kind of preparation method of the high titanium solvent borne pelletizing of high chromium and by Gao Ge made from this method
High titanium solvent borne pelletizing.
A kind of high titanium solvent borne pelletizing of high chromium is preparation method, and preparation process includes：
The high ilmenite concentrate of high chromium transported back from mining area is placed in baking oven, dries 1.5h under conditions of 200 DEG C of temperature so that is high
The high ilmenite concentrate water content of chromium is below 2%.Then the high ilmenite concentrate 9700kg of the high chromium after active lime 240kg, drying is weighed
And bentonite 190kg is spare.
In 0.109mm or less and grain size it is that 0.075mm particles below account for powder by high chromium high ilmenite concentrate mill choosing to grain size
The 85% of the high ilmenite concentrate total weight of high chromium of shape；By active lime mill choosing to grain size in 0.109mm hereinafter, and grain size be
0.075 particle below accounts for the 93% of the active lime total weight of powdery.The high ilmenite concentrate of the high chromium of powdery after mill selects and activity
Lime is placed in mixing 4min in mixing machine and both above-mentioned be uniformly mixed is made to obtain mixed pelletizing material.
Mixed pelletizing material is placed in the disc balling machine of 1000 × 350mm of Φ (side is high), disc balling machine rotating speed is set
For 48 ° of 24r/min, inclination angle, the green-ball that obtained moisture is 8%~9% and pelletizing group diameter is 15mm.
The green-ball is placed in drying box, under conditions of temperature is 200 DEG C, pelletizing after 2h must be dried when dry will be done
Pelletizing is placed in Muffle furnace after dry, is started Muffle furnace and is preheated, and preheating temperature is 830 DEG C, preheats 25min, after preheating,
Continue to increase muffle furnace and be baked to 1250 DEG C, the high ripe ball of titanium solvent borne pelletizing of the high chromium of high temperature is obtained after baking 35min,
The ripe ball of high temperature is naturally cooled into room temperature and obtains the high titanium solvent borne pelletizing of high chromium provided in this embodiment.
Embodiment 9
Present embodiments provide a kind of preparation method of the high titanium solvent borne pelletizing of high chromium and by Gao Ge made from this method
High titanium solvent borne pelletizing.
A kind of high titanium solvent borne pelletizing of high chromium is preparation method, and preparation process includes：
The high ilmenite concentrate of high chromium transported back from mining area is placed in baking oven, dries 1.5h under conditions of 200 DEG C of temperature so that is high
The high ilmenite concentrate water content of chromium is below 2%.Then the high ilmenite concentrate 9750kg of the high chromium after active lime 270kg, drying is weighed
And bentonite 230kg is spare.
In 0.109mm or less and grain size it is that 0.075mm particles below account for powder by high chromium high ilmenite concentrate mill choosing to grain size
The 85% of the high ilmenite concentrate total weight of high chromium of shape；By active lime mill choosing to grain size in 0.109mm hereinafter, and grain size be
0.075 particle below accounts for the 93% of the active lime total weight of powdery.The high ilmenite concentrate of the high chromium of powdery after mill selects and activity
Lime is placed in mixing 4min in mixing machine and both above-mentioned be uniformly mixed is made to obtain mixed pelletizing material.
Mixed pelletizing material is placed in the disc balling machine of 1000 × 350mm of Φ (side is high), disc balling machine rotating speed is set
For 48 ° of 24r/min, inclination angle, the green-ball that obtained moisture is 8%~9% and pelletizing group diameter is 15mm.
The green-ball is placed in drying box, under conditions of temperature is 200 DEG C, pelletizing after 2h must be dried when dry will be done
Pelletizing is placed in Muffle furnace after dry, is started Muffle furnace and is preheated, and preheating temperature is 830 DEG C, preheats 25min, after preheating,
Continue to increase muffle furnace and be baked to 1250 DEG C, the high ripe ball of titanium solvent borne pelletizing of the high chromium of high temperature is obtained after baking 35min,
The ripe ball of high temperature is naturally cooled into room temperature and obtains the high titanium solvent borne pelletizing of high chromium provided in this embodiment.
Comparative example 1
This comparative example is substantially the same manner as Example 1, the difference is that bentonite is not added.
Comparative example 2
This comparative example is substantially the same manner as Example 2, the difference is that bentonitic addition is 50kg.
Comparative example 3
This comparative example is substantially the same manner as Example 3, the difference is that bentonitic addition is 100kg.
Experimental example
By the green-ball generated in embodiment 1-9 and comparative example 1-3 preparation process and the final high high titanium solvent of chromium obtained
Property pelletizing carry out intensity test.It is 1-12 groups that embodiment 1-9 and comparative example 1-3 is numbered respectively.
The intensity test of green-ball is carried out by two ways：1. green-ball is promoted to by 100 green-balls of every group of selection
0.5m is freely fallen on iron plate, which average time of record green-ball falls damaged to table 1.2. green-ball is directly placed in resistance to compression inspection
Compression strength is detected in measurement equipment.
The intensity test of the high high titanium solvent borne pelletizing of chromium is：The 100 high high titanium solvent borne pelletizing of chromium of every group of selection is set
Compression strength is detected in resistance to compression detection device, result record average value is entered into table 2.
Calculate each group green-ball rate：Green-ball rate is the green-ball weight generated in manufacturing process and the mixing that disc balling machine is added
Expect weight ratio.Green-ball rate is recorded to table 3.
Detection 1-6 groups, the chemical composition of the high titanium solvent borne pelletizing of the high chromium of 10-12 groups are recorded into table 4, and non-record component is oxygen
Change ferrous and other impurities.
1 each group green-ball resistance to compression degree of table record (drop number, compression strength N/)
4.0 times or more the just breakages, it can be seen that 1-9 groups green-ball averagely falls from table 1, and compression strength is in 7N or so；10-
12 groups of green-balls whereabouts are damaged less than 4.0 times, and compression strength is less than 7N.And compare each comparative example and corresponding embodiment
As can be seen that bentonitic addition can improve the compression strength of green-ball.
The compression strength (N/) of the high titanium solvent borne pelletizing of the high chromium of 2 each group of table
From table 2, it can be seen that the high titanium solvent borne pelletizing compression strength average value of the high chromium of 1-9 groups is in 2100N or more.And
10-12 group pelletizing resistance to compression average values are difficult to meet blast furnace feeding requirement less than 1800N.It can be seen that when making raw material middle rank work
When in bentonite content range provided by the invention, the intensity of pelletizing obtained is high.
3 each group green-ball rate (%) of table
| Group | 1 | 2 | 3 | 4 | 5 | 6 |
| Green-ball rate | 85.8 | 85.1 | 86.0 | 86.1 | 87.2 | 87.1 |
| Group | 7 | 8 | 9 | 10 | 11 | 12 |
| Green-ball rate | 87.3 | 86.8 | 87.8 | 82.0 | 83.7 | 86.4 |
By table 3, it can be seen that each pelletizing production rate of 1-9 groups is 85% or more, and 10-11 group pelletizing production rates are less than
85%, it can be seen that, the bentonite being added in making material helps to improve the production rate of pelletizing.
The high high each component content of titanium solvent borne pelletizing (%) of chromium made from 4 each group of table
By table 4, it can be seen that generate each group pelletizing in primary chemical component：TFe,TiO2And Cr2O3Content phase
Compared with before reaction without significant change, therefore method provided by the invention during making pelletizing for the master in the high ilmenite concentrate of high chromium
Useful component content is wanted not have an impact.
In conclusion the preparation method of the high titanium solvent borne pelletizing of high chromium provided by the invention, due to by the high ilmenite concentrate of high chromium
As raw material, uses active lime to improve the acid the Alkalinous pelletizing convenient for blast furnace reaction is made of the high ilmenite concentrate of high chromium, improve
The blast furnace feeding grade of ore, and then furnace processor is improved, it adds suitable bentonite and makes pelletizing conglobation property obtained good, resistance to compression
Intensity height meets blast furnace and enters stove requirement, and since each step setting of the present invention is reasonable so that after the present invention makes
Main function composition is not lost in the high high ilmenite concentrate of chromium in pelletizing, and the high titanium pelletizing of high chromium that production is obtained is used to refine
Product containing chromium, and the pelletizing that certain size is made in the high ilmenite concentrate of high chromium can improve furnace charge air permeability, Jin Erti for smelting iron
High furnace processor.
The high titanium solvent borne pelletizing of high chromium provided by the invention, due to using the high high titanium solvent borne pelletizing of chromium provided by the invention
Preparation method be made, therefore the high high titanium solvent borne pelletizing compression strength height of chromium meets blast furnace and enters stove requirement, and pelletizing is in
Alkaline feed grade is high, so that furnace processor is high, and can improve furnace charge due to Sizes, when as iron-smelting raw material and breathe freely
Property, and then improve furnace processor.
The high titanium solvent borne pelletizing crop raw material of high chromium provided by the invention are for that when smelting iron, can improve furnace processor.
The foregoing is merely the preferred embodiment of the present invention, are not intended to restrict the invention, for this field
For technical staff, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by
Modification, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of preparation method of the high titanium solvent borne pelletizing of high chromium, which is characterized in that include the following steps：
Manufacture raw material is uniformly mixed and obtains mixed pelletizing material, the manufacture raw material is counted in parts by weight, including 95~98.4 parts
The high ilmenite concentrate of high chromium, 1.6~3 parts of active lime and 1.5~2.3 parts of bentonite；
The mixed pelletizing material is fabricated to the green-ball that agglomerate particle size is 8~16mm, moisture is 8~9%；
The green-ball is dried to obtain the high titanium solvent borne pelletizing of high chromium.
2. the preparation method of the high titanium solvent borne pelletizing of high chromium according to claim 1, which is characterized in that raw material will manufactured
Further include that it is in powdery, powdery that the high high ilmenite concentrate of chromium and the active lime, which are carried out mill choosing, before being mixed or after mixing
The high high ilmenite concentrate of chromium grain size in 0.55mm hereinafter, the grain size of the active lime of powdery 0.109mm with
Under.
3. the preparation method of the high titanium solvent borne pelletizing of high chromium according to claim 2, which is characterized in that the height of powdery
In the high ilmenite concentrate of chromium grain size be 0.075mm particles below account for powdery the high high ilmenite concentrate total weight of chromium 75%~
100%, grain size is the active lime total weight that 0.075 particle below accounts for powdery in the active lime of powdery
92.5~100%.
4. the preparation method of the high titanium solvent borne pelletizing of high chromium according to claim 1, which is characterized in that raw material will manufactured
Further include that the high high ilmenite concentrate of chromium is dried to moisture below 2% before being mixed.
5. the preparation method of the high titanium solvent borne pelletizing of high chromium according to claim 4, which is characterized in that the high chromium is high
Ilmenite concentrate is dried under conditions of temperature is 200~300 DEG C.
6. the preparation method of the high titanium solvent borne pelletizing of high chromium according to claim 1, which is characterized in that make the mixing
Ball material is placed in disc balling machine, is 22~25r/min, 46 °~51 ° of inclination angle under conditions of system in the disc balling machine rotating speed
Produce the green-ball.
7. the preparation method of the high titanium solvent borne pelletizing of high chromium according to claim 1, which is characterized in that dry green-ball
It is dry to include the following steps：
The green-ball is placed in dry 1.8~2.2h under conditions of temperature is 150~350 DEG C, pelletizing after must drying；
Pelletizing after the drying is placed under conditions of temperature is 1200~1300 DEG C and bakes 35~50min and obtains the high titanium of the high chromium of high temperature
Solvent borne pelletizing；
The high titanium solvent borne pelletizing of the high chromium of the high temperature is cooled down to obtain the high titanium solvent borne pelletizing of the high chromium.
8. the preparation method of the high titanium solvent borne pelletizing of high chromium according to claim 7, which is characterized in that by the green-ball
Further include that the green-ball is placed under conditions of temperature is 750~850 DEG C to preheat 15~25min before being baked.
9. a kind of high titanium solvent borne pelletizing of the high chromium of high temperature, which is characterized in that using such as claim 1-8 any one of them Gao Ge
The preparation method of high titanium solvent borne pelletizing is made.
10. application of the high titanium solvent borne pelletizing of the high chromium of high temperature according to claim 9 as raw material in ironmaking.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114592123A (en) * | 2021-12-27 | 2022-06-07 | 福建通海镍业科技有限公司 | Chromium ore powder ball and preparation method thereof |
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| CN107475514A (en) * | 2017-07-26 | 2017-12-15 | 东北大学 | A kind of preparation method of high-chromic vanadium-titanium ferroferrite pelletizing |
| CN107881338A (en) * | 2017-11-21 | 2018-04-06 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of preparation method of self-fluxing nature vanadium titanium globe |
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| CN1091778A (en) * | 1993-04-05 | 1994-09-07 | 王明奎 | High Ti cold curing pellet |
| CN105734271A (en) * | 2016-04-15 | 2016-07-06 | 攀钢集团攀枝花钢铁研究院有限公司 | Pellet containing chromium, vanadium and titanium and production method of pellet |
| CN107475514A (en) * | 2017-07-26 | 2017-12-15 | 东北大学 | A kind of preparation method of high-chromic vanadium-titanium ferroferrite pelletizing |
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| CN114592123A (en) * | 2021-12-27 | 2022-06-07 | 福建通海镍业科技有限公司 | Chromium ore powder ball and preparation method thereof |
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