CN106521096A - High aluminum slag modifier pellet and preparation method thereof - Google Patents
High aluminum slag modifier pellet and preparation method thereof Download PDFInfo
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- CN106521096A CN106521096A CN201611011575.9A CN201611011575A CN106521096A CN 106521096 A CN106521096 A CN 106521096A CN 201611011575 A CN201611011575 A CN 201611011575A CN 106521096 A CN106521096 A CN 106521096A
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- adjusting agent
- high alumina
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- tailings
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/076—Use of slags or fluxes as treating agents
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0087—Treatment of slags covering the steel bath, e.g. for separating slag from the molten metal
-
- 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
- C22B1/244—Binding; Briquetting ; Granulating with binders organic
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Analytical Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention relates to the field of ferrous metallurgy and discloses a high aluminum slag modifier pellet and a preparation method thereof. The high aluminum slag modifier pellet is prepared from, by mass percentage, 20-30% of steel ladle cast residue tag and tailings fine powder, 15-20% of vanadium iron tailings, 25-29.5% of aluminum powder, 20-30% of lime, a pellet binding agent accounting for 1-3% of the total weight of the above-mentioned four raw materials and water smaller than the total mass of the pellet by 1.5%. The high aluminum slag modifier pellet is prepared by adopting the steel ladle cast residue tag and tailings fine powder, the vanadium iron tailings, the aluminum powder and the lime for mixed pelletizing and drying, the using amount of the aluminum powder is substantially reduced, waste vanadium iron tailings are effectively utilized, the production cost is greatly reduced, the steel-making cost is effectively controlled, and good economic benefits are achieved.
Description
Technical field
The present invention relates to field of steel metallurgy, especially a kind of high alumina slag adjusting agent pelletizing and preparation method thereof.
Background technology
After molten steel casting terminates, the residue in ladle, i.e. casting residue, with good mobility, and liquid steel refining
When the top of the slag carried out deoxidation, its oxidisability is relatively low.Most of ladle casting residue has affinability, while a certain amount of steel of residual
Water, also has higher sensible heat in addition, therefore, ladle casting residue has good comprehensive utilization value.
At present, domestic some steel mills have been realized in the online hot cycling and reutilization of part casting residue, but also have compared with
Most of ladle casting residue needs to recycle by cold conditions.Casting residue is mainly fetched water cold by the cold conditions recovery of ladle casting residue
After carry out that hammer is broken, the broken slag steel and the casting residue of fritter for obtaining bulk of hammer, fritter casting residue by broken, magnetic separation and are sieved again
To varigrained little slag steel and casting residue tailings fine powder, wherein the slag steel of bulk and varigrained small dreg piece steel iron-holder compared with
Height, can be further with, but ladle casting residue tailings iron-holder is low, and value is not high, and its granularity is thinner, in white
Toner ash shape, if cannot deal carefully with, easily causes environmental pollution.In this regard, patent document of the publication No. for CN105112651A
A kind of high alumina slag adjusting agent pelletizing and its preparation method are disclosed, which passes through ladle casting residue tailings, calcined bauxite in powder and aluminium powder mixing system
Glomeration, screened, drying sieve again after made by there is the slag adjusting agent of extensive use, this scheme can reclaim steel-making two very well
Secondary resource, it is to avoid ladle casting residue tailings stacks the environmental pollution for being not good at causing.
But need in this approach to consume a large amount of high-purity aluminium powders, high-purity aluminium powder on the market is expensive, per tondal
To tens of thousands of tens of thousands of to ten, and it is very high to produce the calcined bauxite in powder purity requirement of the slag adjusting agent, requires more than high grade bauxite powder, such height
The price of purity alumina powder also costly, thus results in the with high costs of slag adjusting agent, and then has influence on iron and steel production cost
Control.
The content of the invention
The technical problem to be solved is to provide a kind of high alumina residue adjustment that cost is greatly reduced, environmental pollution is reduced
Agent pelletizing and preparation method thereof.
High alumina slag adjusting agent pelletizing disclosed by the invention, high alumina slag adjusting agent pelletizing are made up of following components by mass percentage：
Ladle casting residue tailings fine powder 20～30%, vanadium iron tailings 15～20%, aluminium powder 25～29.5%, Calx 20～30%, account for institute
State the pellet binder and the moisture less than pelletizing gross mass 1.5% of front four kinds of raw material gross weights 1～3%.
Preferably, the ladle casting residue tailings fine powder chemical composition by mass percentage for CaO >=35%,
Al2O315～30%, SiO2≤15%, S≤0.25%, granularity are less than 5mm；The vanadium iron tailings chemical composition presses quality percentage
Than being calculated as Al2O3 >=60%, S≤0.02%, granularity is less than 5mm；The aluminium powder chemical composition by mass percentage for Al >=
99.7%, granularity is 3～8mm.
Preferably, the pellet binder is the cold moudling binding material that main component is hydroxypropyl cellulose.
The preparation method of high alumina slag adjusting agent pelletizing disclosed by the invention, for preparing described high alumina slag adjusting agent pelletizing, according to
Secondary execution following steps：
A, by ladle casting residue tailings fine powder, vanadium iron tailings, aluminium powder, Calx by proportioning add in batch mixing blender it is dry-mixed
It is even, then to add the pellet binder of quantitative ratio to carry out in the raw material after mixing dry-mixed, until mixing, is subsequently adding quantitative ratio
The water of example, stirs when adding water；
It is 30～50mm's that raw material after b, by stirring and evenly mixing and fully moistening is pressed into specification in sending into chilling press
It is spherical or oval；
Sieved with sieve for the first time after c, cold moudling, dry in the sun of then tiling naturally, waterproof anti-explosion are shone；
D, deliver to drying oven in carry out baking drying；
E, naturally stacking are cooled to room temperature, then carry out regrading with sieve, obtain finished product.
Preferably, ladle casting residue tailings fine powder in step a, vanadium iron tailings, aluminium powder, Calx these four raw materials it is dry-mixed
Time is 2～3min；The dry-mixed time after pellet binder is added to be 1～2min.
Preferably, the mode that adds water in step a is spray, and amount of water is the 5～6% of raw material gross weight, and add water speed
For 0.45～0.54kg/s, the mixing time after adding water is 2～3min.
Preferably, in step c, first screening is sieved using the sieve of 10mm sieve apertures.
Preferably, in step c, natural drying is dried by the way of tiling and carries out dry in the sun, pelletizing tiling thickness≤30cm,
The time of natural drying >=24h.
Preferably, it is 100～150 DEG C that temperature used by being dried is toasted in step d, and baking time is 8～12h.
Preferably, in step e, regrading is sieved using the sieve of 5mm sieve apertures.
The invention has the beneficial effects as follows：High alumina slag adjusting agent pelletizing disclosed by the invention using ladle casting residue tailings fine powder,
Vanadium iron tailings, aluminium powder and Calx mixed pelletizing are dried and make, and which significantly reduces aluminium powder consumption, and is effectively utilized discarded
Vanadium iron tailings, significantly reduce production cost, effective control steel-making cost, with good economic benefit.
Specific embodiment
The present invention is further described below.
High alumina slag adjusting agent pelletizing disclosed by the invention, is made up of following components by mass percentage：Ladle casting residue tailings
Fine powder 20～30%, vanadium iron tailings 15～20%, aluminium powder 25～29.5%, Calx 20～30%, to account for front four kinds of raw materials total
The pellet binder of weight 1～3% and the moisture less than pelletizing gross mass 1.5%.
Preferably, the ladle casting residue tailings fine powder chemical composition by mass percentage for CaO >=35%,
Al2O315～30%, SiO2≤15%, S≤0.25%, granularity are less than 5mm；The vanadium iron tailings chemical composition presses quality percentage
Than being calculated as Al2O3 >=60%, S≤0.02%, granularity is less than 5mm；The aluminium powder chemical composition by mass percentage for Al >=
99.7%, granularity is 3～8mm.
Preferably, the pellet binder is the cold moudling binding material that main component is hydroxypropyl cellulose.
The high alumina slag adjusting agent pelletizing can be prepared using conventional slag adjusting agent preparation method, described high alumina slag adjusting agent pelletizing
Preferred preparation method, perform following steps successively：
A, by ladle casting residue tailings fine powder, vanadium iron tailings, aluminium powder, Calx by proportioning add in batch mixing blender it is dry-mixed
The pellet binder of quantitative ratio is added to carry out dry-mixed 1～2min in even 2～3min, then the raw material after mixing, until mix,
Then the water of quantitative ratio is added in spray mode, is stirred when adding water, amount of water is the 5～6% of raw material gross weight, adds water
Speed is 0.45～0.54kg/s, and the mixing time after adding water is 2～3min；
It is 30～50mm's that raw material after b, by stirring and evenly mixing and fully moistening is pressed into specification in sending into chilling press
It is spherical or oval；
Sieve after c, cold moudling using 10mm sieve apertures is sieved for the first time, dry in the sun of then tiling naturally, pelletizing tiling
Thickness≤30cm, the time >=24h waterproof anti-explosions of natural drying shine；
D, deliver to drying oven in carry out baking drying at 100～150 DEG C, baking time is 8～12h；
E, naturally stacking are cooled to room temperature, then carry out regrading using the sieve of 5mm sieve apertures, obtain finished product；
F, sampling detection physical and chemical standards warehousing after passing are standby.
It is below embodiments of the invention
The ladle casting residue tailings fine powder chemical composition adopted in embodiment 1～3 and comparative example 1 is by mass percentage
Containing CaO 38.56%, Al2O3 18.65%, SiO2 12.14%, S 0.15%, granularity is less than 5mm, vanadium iron tailings chemistry into
Divide, granularity is less than 5mm, and Calx chemical composition contains by mass percentage
CaO 95.66%, aluminium powder contain Al 99.7%.
Embodiment 1
Above-mentioned four kinds of raw materials are added into dry-mixed uniform 3min in batch mixing blender, wherein ladle casting residue tailings essence by proportioning
Powder accounts for the 21% of raw material gross weight, vanadium iron tailings 20%, aluminium powder 29%, adds 2% in Calx 30%, then the raw material after mixing
Pellet binder carry out dry-mixed 2min, until mix, the water of raw material gross weight 5% is then added in spray mode, while adding water
Side is stirred, and the speed that adds water is 0.45kg/s, and the mixing time after adding water is 3min；By the raw material after stirring and evenly mixing simultaneously abundant moistening
Specification is pressed in sending into chilling press for the spherical or oval of 40mm；Sieve after cold moudling using 10mm sieve apertures enters
Row is first to be sieved, and dry in the sun of then tiling naturally, the time 24h of pelletizing tiling natural drying, waterproof anti-explosion are shone；Deliver in drying oven
Baking drying is carried out at 100 DEG C, baking time is 12h；Naturally stack and be cooled to room temperature, then entered using the sieve of 5mm sieve apertures
Row regrading, obtains finished product.
Embodiment 2
Above-mentioned four kinds of raw materials are added into dry-mixed uniform 3min in batch mixing blender, wherein ladle casting residue tailings essence by proportioning
Powder accounts for the 30% of raw material gross weight, vanadium iron tailings 15%, aluminium powder 25%, adds 2% in Calx 30%, then the raw material after mixing
Pellet binder carry out dry-mixed 2min, until mix, the water of raw material gross weight 5% is then added in spray mode, while adding water
Side is stirred, and the speed that adds water is 0.54kg/s, and the mixing time after adding water is 3min；By the raw material after stirring and evenly mixing simultaneously abundant moistening
Specification is pressed in sending into chilling press for the spherical or oval of 40mm；Sieve after cold moudling using 10mm sieve apertures enters
Row is first to be sieved, and dry in the sun of then tiling naturally, the time 24h of pelletizing tiling natural drying, waterproof anti-explosion are shone；Deliver in drying oven
Baking drying is carried out at 100 DEG C, baking time is 12h；Naturally stack and be cooled to room temperature, then entered using the sieve of 5mm sieve apertures
Row regrading, obtains finished product.
Embodiment 3
Above-mentioned four kinds of raw materials are added into dry-mixed uniform 3min in batch mixing blender, wherein ladle casting residue tailings essence by proportioning
Powder accounts for the 27% of raw material gross weight, vanadium iron tailings 18%, aluminium powder 27%, adds 2% in Calx 28%, then the raw material after mixing
Pellet binder carry out dry-mixed 2min, until mix, the water of raw material gross weight 5% is then added in spray mode, while adding water
Side is stirred, and the speed that adds water is 0.5kg/s, and the mixing time after adding water is 3min；By the raw material after stirring and evenly mixing simultaneously abundant moistening
Specification is pressed in sending into chilling press for the spherical or oval of 40mm；Sieve after cold moudling using 10mm sieve apertures enters
Row is first to be sieved, and dry in the sun of then tiling naturally, the time 24h of pelletizing tiling natural drying, waterproof anti-explosion are shone；Deliver in drying oven
Baking drying is carried out at 100 DEG C, baking time is 12h；Naturally stack and be cooled to room temperature, then entered using the sieve of 5mm sieve apertures
Row regrading, obtains finished product.
Comparative example 1
Above-mentioned four kinds of raw materials are added into dry-mixed uniform 3min in batch mixing blender, wherein ladle casting residue tailings essence by proportioning
Powder accounts for the 25% of raw material gross weight, vanadium iron tailings 15%, aluminium powder 35%, adds 2% in Calx 25%, then the raw material after mixing
Pellet binder carry out dry-mixed 2min, until mix, 5.4 water is then added in spray mode, is stirred when adding water, plus
Water speed is 0.54kg/s, and the mixing time after adding water is 3min；Raw material after stirring and evenly mixing simultaneously abundant moistening is sent into and is colded pressing
Specification is pressed in forming machine for the spherical or oval of 40mm；Sieve after cold moudling using 10mm sieve apertures is sieved for the first time
Point, dry in the sun of then tiling naturally, the time 24h of pelletizing tiling natural drying, waterproof anti-explosion shine；Deliver in drying oven at 100 DEG C
Baking drying is carried out, baking time is 12h；Naturally stack and be cooled to room temperature, secondary sieve is carried out using the sieve of 5mm sieve apertures then
Point, obtain finished product.
It is below the utilization effect of above-described embodiment and the high alumina slag adjusting agent obtained by comparative example
A, ladle top slag modification
Complete after tapping terminates, to stay the quantity of slag to be separately added on 300～400 according to ladle bessemerizing in smelting process
Embodiment 1～3 and the high alumina slag adjusting agent obtained by comparative example 1 are stated, sampling detection adds ladle slag ingredient before and after various slag adjusting agents, enters
After the multigroup experiment of row, each composition correction data of gained is as follows：
1 embodiment 1～3 of table and comparative example 1 are used for each composition correction data after ladle top slag modification
Analysis upper table can be seen that using the high alumina slag adjusting agent in the embodiment of the present invention 1～3, can effectively residue adjustment, remove
Oxygen in slag, and in the slag adjusting agent of comparative example 1 that increased aluminium powder consumption, not only do not obtain more preferable residue adjustment deoxidation effect
Really, and ladle top slag modification effect decrease on the contrary.
B, RH front finishing slag adjustment leaving from station
After the completion of RH vacuum refinings are processed, 100～200 above-described embodiments 1～3 and right are separately added into the ladle top of the slag
High alumina slag adjusting agent obtained by ratio 1 is adjusted to finishing slag leaving from station, and adjustment result is as shown in the table
2 embodiment 1～3 of table and comparative example 1 are used for RH front finishing slag Adjustment effect contrasts leaving from station
Claims (10)
1. high alumina slag adjusting agent pelletizing, it is characterised in that be made up of following components by mass percentage：Ladle casting residue tailings fine powder
20～30%, vanadium iron tailings 15～20%, aluminium powder 25～29.5%, Calx 20～30%, account for front four kinds of raw material gross weights 1
～3% pellet binder and the moisture less than pelletizing gross mass 1.5%.
2. high alumina slag adjusting agent pelletizing as claimed in claim 1, it is characterised in that：Ladle casting residue tailings fine powder chemistry into
It is by mass percentage CaO >=35%, Al2O3 15～30%, SiO2≤15%, S≤0.25% to divide, and granularity is less than 5mm；
The vanadium iron tailings chemical composition is Al2O3 >=60%, S≤0.02% by mass percentage, and granularity is less than 5mm；The aluminum
Powder chemical composition is Al >=99.7% by mass percentage, and granularity is 3～8mm.
3. high alumina slag adjusting agent pelletizing as claimed in claim 1 or 2, it is characterised in that：The pellet binder is main component
For the cold moudling binding material of hydroxypropyl cellulose.
4. the preparation method of high alumina slag adjusting agent pelletizing, it is characterised in that：Prepare the high alumina described in any one of claims 1 to 3 to adjust
Slag agent pelletizing, performs following steps successively：
A, ladle casting residue tailings fine powder, vanadium iron tailings, aluminium powder, Calx are added by proportioning it is dry-mixed uniform in batch mixing blender,
In the raw material after mixing add the pellet binder of quantitative ratio to carry out again dry-mixed, until mixing, be subsequently adding quantitative ratio
Water, stir when adding water；
It is the spherical of 30～50mm that raw material after b, by stirring and evenly mixing and fully moistening is pressed into specification in sending into chilling press
Or it is oval；
Sieved with sieve for the first time after c, cold moudling, then natural drying, waterproof anti-explosion shines；
D, deliver to drying oven in carry out baking drying；
E, naturally stacking are cooled to room temperature, then carry out regrading with sieve, obtain finished product.
5. the preparation method of high alumina slag adjusting agent pelletizing as claimed in claim 4, it is characterised in that：Ladle casting residue in step a
Tailings fine powder, vanadium iron tailings, aluminium powder, the dry-mixed time of Calx these four raw materials are 2～3min；After adding pellet binder
The dry-mixed time is 1～2min.
6. the preparation method of the high alumina slag adjusting agent pelletizing as described in claim 4 or 5, it is characterised in that：The side of adding water in step a
Formula is spray, amount of water for raw material gross weight 5～6%, when the speed that adds water is 0.45～0.54kg/s, stirring after adding water
Between be 2～3min.
7. the preparation method of high alumina slag adjusting agent pelletizing as claimed in claim 4, it is characterised in that：First screening in step c is adopted
Sieved with the sieve of 10mm sieve apertures.
8. the preparation method of the high alumina slag adjusting agent pelletizing as described in claim 4 or 7, it is characterised in that：Natural drying in step c
Being dried by the way of tiling carries out dry in the sun, pelletizing tiling thickness≤30cm, the time >=24h of natural drying.
9. the preparation method of high alumina slag adjusting agent pelletizing as claimed in claim 4, it is characterised in that：Baking in step d is dried institute
It it is 100～150 DEG C with temperature, baking time is 8～12h.
10. the preparation method of high alumina slag adjusting agent pelletizing as claimed in claim 4, it is characterised in that：In step e, regrading is adopted
Sieved with the sieve of 5mm sieve apertures.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611011575.9A CN106521096A (en) | 2016-11-17 | 2016-11-17 | High aluminum slag modifier pellet and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611011575.9A CN106521096A (en) | 2016-11-17 | 2016-11-17 | High aluminum slag modifier pellet and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107119173A (en) * | 2017-05-02 | 2017-09-01 | 攀钢集团西昌钢钒有限公司 | A kind of slag adjusting agent and preparation method thereof |
| CN109825666A (en) * | 2018-08-09 | 2019-05-31 | 黄龙 | A kind of formula and preparation method thereof of free-floride slagging agent |
| CN109825671A (en) * | 2018-06-28 | 2019-05-31 | 蒋维柒 | A kind of preparation method and its usage of industrial silica fume pelletizing |
| CN111334644A (en) * | 2020-03-11 | 2020-06-26 | 攀钢集团攀枝花钢铁研究院有限公司 | Fluorine-free refining fluxing slag melting agent and preparation and use method thereof |
| CN112680567A (en) * | 2020-12-09 | 2021-04-20 | 钢城集团凉山瑞海实业有限公司 | High-aluminum slag modifier for LF (ladle furnace) and preparation method thereof |
-
2016
- 2016-11-17 CN CN201611011575.9A patent/CN106521096A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107119173A (en) * | 2017-05-02 | 2017-09-01 | 攀钢集团西昌钢钒有限公司 | A kind of slag adjusting agent and preparation method thereof |
| CN109825671A (en) * | 2018-06-28 | 2019-05-31 | 蒋维柒 | A kind of preparation method and its usage of industrial silica fume pelletizing |
| CN109825666A (en) * | 2018-08-09 | 2019-05-31 | 黄龙 | A kind of formula and preparation method thereof of free-floride slagging agent |
| CN111334644A (en) * | 2020-03-11 | 2020-06-26 | 攀钢集团攀枝花钢铁研究院有限公司 | Fluorine-free refining fluxing slag melting agent and preparation and use method thereof |
| CN112680567A (en) * | 2020-12-09 | 2021-04-20 | 钢城集团凉山瑞海实业有限公司 | High-aluminum slag modifier for LF (ladle furnace) and preparation method thereof |
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