CN108998660A - A kind of vanadium ilmenite concentrate powder deep-bed sintering technique - Google Patents
A kind of vanadium ilmenite concentrate powder deep-bed sintering technique Download PDFInfo
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- CN108998660A CN108998660A CN201811157759.5A CN201811157759A CN108998660A CN 108998660 A CN108998660 A CN 108998660A CN 201811157759 A CN201811157759 A CN 201811157759A CN 108998660 A CN108998660 A CN 108998660A
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- sintering
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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
- C22B1/16—Sintering; Agglomerating
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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
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Abstract
The present invention discloses a kind of vanadium ilmenite concentrate powder deep-bed sintering technique, includes the following steps: for raw materials for sintering to be uniformly mixed, and the raw materials for sintering includes 50-60 parts of vanadium ilmenite concentrate powder by weight, and 5-8 parts of fine iron breeze, 10-20 parts of flux, 3-5 parts of fuel；Raw materials for sintering is crushed；Pelletizing is prepared into after powder water infiltration；By on pelletizing cloth to agglomerating plant, fabric thickness 720-740mm；It is pellet by pellet sintering；The cooling pellet.By changing the composition proportion of raw materials for sintering, addition flux increases air-flow mobility, to realize thicker sintering feed thickness, realizes the improvement to sinter quality.
Description
Technical field
The present invention relates to field of metallurgy, and in particular to a kind of vanadium ilmenite concentrate powder deep-bed sintering technique.
Background technique
Deep-bed sintering is as the sintering technology for starting the 1980s to grow up.Deep-bed sintering is being burnt by it
Have during tying and increases the effect of bed of material auto accumulation heat, raising heat exchange conditions, the advantages such as saving solid fuel consumption, nearly 30 years
To be used widely and fast-developing.
Deep-bed sintering has longer high temperature hold time, so as to improve the mineralising condition of sinter, improves and burns
Tie mine intensity.As domestic iron ore resource is in short supply, some large scale sintering factories begin to use outer miberal powder, outer miberal powder with addition of ratio
Increase year by year, provides objective power to increase the research of deep bed sintering thickness.
The sintering material layer thickness of current most of producers has been increased to 650-700mm.Problem is, with thickness of feed layer
It further increases, material is from the pressure increase reformed, so that the compaction rate of the bed of material is promoted；Meanwhile the thickness of bed of material excessive moistening layer
Degree increases, so that air resistance becomes larger.Above-mentioned factor causes the permeability of the bed of material to be deteriorated, vertical sintering speed decline, thus
Constrain further increasing for sintering material layer thickness.
Summary of the invention
In view of this, the application provides a kind of vanadium ilmenite concentrate powder deep-bed sintering technique.By change raw materials for sintering at
Distribution ratio, addition flux increases air-flow mobility, to realize thicker sintering feed thickness, realizes to sinter quality
Improve.
In order to solve the above technical problems, technical solution provided by the invention is a kind of V-Ti deep-bed sintering technique,
Include the following steps:
Raw materials for sintering is uniformly mixed, the raw materials for sintering includes 50-60 parts of vanadium ilmenite concentrate powder by weight, iron ore concentrate
5-8 parts of powder, 10-20 parts of flux, 3-5 parts of fuel；
Raw materials for sintering is crushed；
Pelletizing is prepared into after powder water infiltration；
By on pelletizing cloth to agglomerating plant, fabric thickness 720-740mm；
It is pellet by pellet sintering；
The cooling pellet.
Preferably, the flux includes at least one of dolomite, lime stone, quick lime.
Preferably, the flux includes 4-6 parts of dolomite by weight, and 6-16 parts of lime stone.
Preferably, it is prepared into pelletizing step after powder water infiltration, specifically, the biodiversity contained in pelletizing accounts for
The 8-10% of gross mass.
Preferably, described by raw materials for sintering pulverising step, specifically, crushing raw materials for sintering, make raw materials for sintering granularity in 3-
The part of 7mm accounts for 70% of total mass fraction or more.
Preferably, described by pellet sintering is pellet step, specifically, igniting carries out down draft sintering, firing temperature is
950-1100 DEG C, suction pressure 9-11KPa.
Preferably, further comprising the steps of before the cooling pellet step:
It is crushed the pellet, makes partial size≤140mm of the pellet；
The part of partial size < 5mm in broken pellet is screened out.
The application compared with prior art, it has the advantage that:
Raw materials for sintering composition proportion is adjusted, addition flux increases air-flow mobility, to realize thicker sintering feed
Thickness realizes the improvement to sinter quality.
With the raising of fabric thickness, accounting decline of the surface layer mine in the bed of material improves the yield rate of sinter.
Sintering is more abundant, realizes the reduction of mixed carbon comtent, and oxidizing atmosphere enhances in the bed of material, improves the reduction of sinter
Degree, so that FeO content is minimized.
Specific embodiment
It is right combined with specific embodiments below in order to make those skilled in the art more fully understand technical solution of the present invention
The present invention is described in further detail.
The embodiment of the present invention provides a kind of vanadium ilmenite concentrate powder deep-bed sintering technique, includes the following steps:
Raw materials for sintering is uniformly mixed, the raw materials for sintering includes 50-60 parts of vanadium ilmenite concentrate powder by weight, iron ore concentrate
5-8 parts of powder, 3-5 parts of fuel, 10-20 parts of flux；The flux includes 4-6 parts of dolomite, and 6-16 parts of lime stone, further include raw stone
Ash or calcium hydroxide；Using carbon granule as fuel in the present embodiment.
Raw materials for sintering is crushed, raw materials for sintering granularity is made to account for 70% or more of total mass fraction in the part of 3-7mm；
Pelletizing is prepared into after powder water infiltration, the biodiversity contained in pelletizing accounts for the 8-10% of gross mass；
By on pelletizing cloth to agglomerating plant, fabric thickness 720-740mm；
Igniting carries out down draft sintering to pelletizing, and firing temperature is 950-1100 DEG C, suction pressure 9-11KPa.
It is crushed the pellet, makes partial size≤140mm of the pellet；
The part of partial size < 5mm in broken pellet is screened out.
The cooling pellet.
Vanadium-titanium magnitite sinter is prepared using the vanadium ilmenite concentrate powder deep-bed sintering technique that the technical program provides, is burnt by changing
The composition proportion of raw material is tied, addition flux increases air-flow mobility, to realize the fabric thickness of 720-740mm.Quick lime
Calcium hydroxide is generated after adding water, can also directly add calcium hydroxide, hydrated lime particle is taken a walk in colloid in pelletizing, had larger
Specific surface area, the gas permeability of pelletizing can be promoted.Thicker fabric thickness can be improved the accumulation of heat effect of the bed of material, improve heat exchange
Condition saves solid fuel consumption.The high temperature hold time of deep bed sintering is long, facilitates the mineralising of sinter, improves sinter
Mechanical strength.The quality of surface layer mine be it is relatively-stationary, by thickening the thickness of the bed of material, mass percent shared by the mine of surface layer
Declined, improves the overall quality of sinter.Oxidizing atmosphere enhances in the bed of material, and mixed carbon comtent is reduced, the burning prepared
Tying FeO content in mine reduces, and improves the reducing property of sinter.
Embodiment 1
Raw materials for sintering is uniformly mixed, the raw materials for sintering includes 50 parts of vanadium ilmenite concentrate powder by weight, fine iron breeze 5
Part, 3 parts of fuel, 4 parts of dolomite, 6 parts of lime stone；
Raw materials for sintering is crushed, raw materials for sintering granularity is made to account for 70% or more of total mass fraction in the part of 3-7mm；
Pelletizing is prepared into after powder water infiltration, the biodiversity contained in pelletizing accounts for the 10% of gross mass；
By on pelletizing cloth to agglomerating plant, fabric thickness 720mm；
Igniting carries out down draft sintering to pelletizing, and firing temperature is 950 DEG C, suction pressure 9KPa.
It is crushed the pellet, makes partial size≤140mm of the pellet；
The part of partial size < 5mm in broken pellet is screened out.
The cooling pellet.
Embodiment 2
Raw materials for sintering is uniformly mixed, the raw materials for sintering includes 55 parts of vanadium ilmenite concentrate powder by weight, fine iron breeze 6
Part, 4 parts of fuel, 5 parts of dolomite, 8 parts of lime stone, 3 parts of quick limes；
Raw materials for sintering is crushed, raw materials for sintering granularity is made to account for 70% or more of total mass fraction in the part of 3-7mm；
Pelletizing is prepared into after powder water infiltration, the biodiversity contained in pelletizing accounts for the 9% of gross mass；
By on pelletizing cloth to agglomerating plant, fabric thickness 730mm；
Igniting carries out down draft sintering to pelletizing, and firing temperature is 1000 DEG C, suction pressure 10KPa.
It is crushed the pellet, makes partial size≤140mm of the pellet；
The part of partial size < 5mm in broken pellet is screened out.
The cooling pellet.
Embodiment 3
Raw materials for sintering is uniformly mixed, the raw materials for sintering includes 60 parts of vanadium ilmenite concentrate powder by weight, fine iron breeze 8
Part, 5 parts of fuel, 6 parts of dolomite, 8 parts of lime stone, 6 parts of calcium hydroxide；
Raw materials for sintering is crushed, raw materials for sintering granularity is made to account for 70% or more of total mass fraction in the part of 3-7mm；
Pelletizing is prepared into after powder water infiltration, the biodiversity contained in pelletizing accounts for the 8% of gross mass；
By on pelletizing cloth to agglomerating plant, fabric thickness 720mm；
Igniting carries out down draft sintering to pelletizing, and firing temperature is 1100 DEG C, suction pressure 11KPa.
It is crushed the pellet, makes partial size≤140mm of the pellet；
The part of partial size < 5mm in broken pellet is screened out.
The cooling pellet.
The above is only the preferred embodiment of the present invention, it is noted that above-mentioned preferred embodiment is not construed as pair
Limitation of the invention, protection scope of the present invention should be defined by the scope defined by the claims..For the art
For those of ordinary skill, without departing from the spirit and scope of the present invention, several improvements and modifications can also be made, these change
It also should be regarded as protection scope of the present invention into retouching.
Claims (7)
1. a kind of vanadium ilmenite concentrate powder deep-bed sintering technique, which comprises the steps of:
Raw materials for sintering is uniformly mixed, the raw materials for sintering includes 50-60 parts of vanadium ilmenite concentrate powder by weight, fine iron breeze 5-
8 parts, 10-20 parts of flux, 3-5 parts of fuel；
Raw materials for sintering is crushed；
Pelletizing is prepared into after powder water infiltration；
By on pelletizing cloth to agglomerating plant, fabric thickness 720-740mm；
It is pellet by pellet sintering；
The cooling pellet.
2. vanadium ilmenite concentrate powder deep-bed sintering technique as described in claim 1, which is characterized in that the flux includes white clouds
At least one of stone, lime stone, quick lime.
3. vanadium ilmenite concentrate powder deep-bed sintering technique as claimed in claim 2, which is characterized in that the flux includes with weight
4-6 parts of the dolomite of meter, 6-16 parts of lime stone.
4. vanadium ilmenite concentrate powder deep-bed sintering technique as claimed in claim 3, which is characterized in that after the powder water infiltration
It is prepared into pelletizing step, specifically, the biodiversity contained in pelletizing accounts for the 8-10% of gross mass.
5. vanadium ilmenite concentrate powder deep-bed sintering technique as described in claim 1, which is characterized in that described to crush raw materials for sintering
Step makes raw materials for sintering granularity account for 70% or more of total mass fraction in the part of 3-7mm specifically, crushing raw materials for sintering.
6. vanadium ilmenite concentrate powder deep-bed sintering technique as described in claim 1, which is characterized in that it is described by pellet sintering be ball
Nodulizing step, specifically, igniting carries out down draft sintering, firing temperature is 950-1100 DEG C, suction pressure 9-11KPa.
7. vanadium ilmenite concentrate powder deep-bed sintering technique as described in claim 1, which is characterized in that in the cooling pellet step
It is further comprising the steps of before rapid:
It is crushed the pellet, makes partial size≤140mm of the pellet；
The part of partial size < 5mm in broken pellet is screened out.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811157759.5A CN108998660A (en) | 2018-09-30 | 2018-09-30 | A kind of vanadium ilmenite concentrate powder deep-bed sintering technique |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811157759.5A CN108998660A (en) | 2018-09-30 | 2018-09-30 | A kind of vanadium ilmenite concentrate powder deep-bed sintering technique |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112575178A (en) * | 2020-12-11 | 2021-03-30 | 四川德胜集团钒钛有限公司 | Preparation process of vanadium-titanium sinter |
| CN112593076A (en) * | 2020-12-11 | 2021-04-02 | 四川德胜集团钒钛有限公司 | Sintering method of high-grade vanadium-titanium-iron ore concentrate |
| CN115323169A (en) * | 2022-08-02 | 2022-11-11 | 首钢京唐钢铁联合有限责任公司 | Pellet and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103627894A (en) * | 2013-11-29 | 2014-03-12 | 攀钢集团攀枝花钢钒有限公司 | Method for sintering vanadium/titanium magnetite concentrate and siderite |
-
2018
- 2018-09-30 CN CN201811157759.5A patent/CN108998660A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103627894A (en) * | 2013-11-29 | 2014-03-12 | 攀钢集团攀枝花钢钒有限公司 | Method for sintering vanadium/titanium magnetite concentrate and siderite |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112575178A (en) * | 2020-12-11 | 2021-03-30 | 四川德胜集团钒钛有限公司 | Preparation process of vanadium-titanium sinter |
| CN112593076A (en) * | 2020-12-11 | 2021-04-02 | 四川德胜集团钒钛有限公司 | Sintering method of high-grade vanadium-titanium-iron ore concentrate |
| CN115323169A (en) * | 2022-08-02 | 2022-11-11 | 首钢京唐钢铁联合有限责任公司 | Pellet and preparation method thereof |
| CN115323169B (en) * | 2022-08-02 | 2023-11-14 | 首钢京唐钢铁联合有限责任公司 | Pellet ore and preparation method thereof |
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Application publication date: 20181214 |
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