CN107955880A - A kind of additive for improving RDI of Sinter and preparation method thereof - Google Patents
A kind of additive for improving RDI of Sinter and preparation method thereof Download PDFInfo
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- CN107955880A CN107955880A CN201610907959.2A CN201610907959A CN107955880A CN 107955880 A CN107955880 A CN 107955880A CN 201610907959 A CN201610907959 A CN 201610907959A CN 107955880 A CN107955880 A CN 107955880A
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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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- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to a kind of additive and preparation method thereof for improving RDI of Sinter, the technical problem of the low temperature reduction degradation index error of the sinter of low content of MgO in the prior art is mainly solved.A kind of additive for improving RDI of Sinter of the present invention, the percentage by weight of its constituent are：CaO 30~32%, SiO22~4%, MgO 15~25%, MnO2、V2O5、TiO2Component and for 0.7~1.0%, remaining is scaling loss and inevitable impurity, additive of the particle diameter less than 1.0mm accounts for more than the 95% of its total amount, and additive of the particle diameter less than 0.5mm accounts for more than the 75% of its total amount, and additive of the particle diameter less than 0.1mm accounts for more than the 20% of its total amount.Additive of the present invention, can not only adjust the content and basicity of MgO in sinter, but also can improve the low-temperature reduction disintegration energy of sinter.
Description
Technical field
It is more particularly to a kind of to improve sinter low temperature reduction degradation the present invention relates to a kind of Ferrous Metallurgy sintering additive
Additive of rate and preparation method thereof, belongs to Ferrous Metallurgy sintering technology field.
Background technology
The low temperature reduction degradation index of sinter is most important to upper blast furnace gas permeability.Influence sinter low-temperature reduction powder
The principal element for changing index has sinter basicity and content of MgO.In general, basicity is adjusted by lime stone and quick lime, content of MgO
Adjusted by flux such as dolomites.But excessive flux containing MgO is added in sintered material, sintering-blast fumance band can be given
Carry out the negative effect of some row, such as sinter strength drop low and high temperature reflow conductor roll is poor, the quantity of slag and energy consumption increase.Therefore, at present
Many iron and steel enterprises of China have carried out the commerical test for reducing sinter content of MgO one after another.But MgO is reduced so that sinter low temperature
Reduction degradation index is deteriorated, and hampers the implementation of low MgO sintering productions always.
The content of the invention
It is main the object of the present invention is to provide a kind of additive for improving RDI of Sinter and preparation method thereof
Solve the technical problem of the low temperature reduction degradation index error of the sinter of low content of MgO in the prior art；In addition, the present invention carries
The additive of confession is notable to the improvement effect same of the low temperature reduction degradation index of the sinter of conventional content of MgO.
The technical solution adopted by the present invention is：
A kind of additive for improving RDI of Sinter, the percentage by weight of its constituent are：CaO30~
32%, SiO22~4%, MgO 15~25%, MnO2、V2O5、TiO2Component and for 0.7~1.0%, remaining is for scaling loss and not
Evitable impurity, additive of the particle diameter less than 1.0mm account for more than the 95% of its total amount, and particle diameter is less than the additive of 0.5mm
More than the 75% of its total amount is accounted for, additive of the particle diameter less than 0.1mm accounts for more than the 20% of its total amount.
The preparation method of the additive of above-mentioned raising RDI of Sinter, this method include：
1) dispensing, dolomite, magnesite, blast furnace slag, manganese oxide, vanadium oxide, titanium dioxide are weighed by proportioning, after mixing
Expect to once mixing, obtained secondary mix is expected after adding water to stir evenly in once mixing material, the secondary weight for mixing material component
Measuring percentage is：Dolomite 89~99%, magnesite 1~7%, blast furnace slag 1~3%, manganese oxide, vanadium oxide and titanium dioxide group
Point and for 0.7~1.0%, water≤1.0%；
2) additive finished product, finished product additive will be obtained after the secondary mixing material fine grinding described in step 1) using ball mill
Additive of the middle particle diameter less than 1.0mm accounts for more than the 95% of its total amount, and additive of the particle diameter less than 0.5mm accounts for its total amount
More than 75%, additive of the particle diameter less than 0.1mm accounts for more than the 20% of its total amount.
Raw material of the present invention includes dolomite, magnesite, blast furnace slag, manganese oxide, vanadium oxide, titanium dioxide, water, raw material components
Percentage by weight require it is as follows：
Dolomite：CaO 30.0~35.0%, SiO22.0~3.0%, MgO 15.0~25.0%；
Magnesite：CaO 1.0~2.0%, SiO23.0~4.0%, MgO 43~45%；
Blast furnace slag：CaO 39~41%, SiO233~35%, MgO 7~8%；
Manganese oxide：MnO299%；
Vanadium oxide：V2O599%；
Titanium dioxide：TiO299%.
Additive of the present invention and other raw materials for sintering (iron ore, fuel, flux, solid waste etc.) are sintered production, obtained
To sinter, the low temperature reduction degradation index of sinter significantly improves.
The present invention has following good effect compared with prior art：
Compared with conventional sintering, using additive of the present invention, not only may insure sinter to basicity, content of MgO etc. into
The requirement divided, can also improve the low-temperature reduction disintegration energy of sinter, reduce the low temperature reduction degradation index of sinter, especially
It can solve the problems, such as that low MgO sinters low-temperature reduction disintegration can be poor, High-quality Sinters can be obtained.
Embodiment
The present invention is further described with reference to specific embodiment.
A kind of additive for improving RDI of Sinter, the percentage by weight of its constituent are：CaO 30
~32%, SiO22~4%, MgO 15~25%, MnO2、V2O5、TiO2Component and for 0.7~1.0%, remaining for scaling loss and
Inevitable impurity, additive of the particle diameter less than 1.0mm account for more than the 95% of its total amount, and particle diameter is less than the addition of 0.5mm
Agent accounts for more than the 75% of its total amount, and additive of the particle diameter less than 0.1mm accounts for more than the 20% of its total amount.
Table 1 is the component (by weight percentage) of additive of the embodiment of the present invention, and surplus is for scaling loss and inevitably
Impurity.
The component of 1 additive of the embodiment of the present invention of table, unit：Percentage by weight.
| Classification | CaO | SiO2 | MgO | MnO2+V2O5+TiO2 |
| The present invention | 30~32 | 2~4 | 19~21 | 0.7~1.0 |
| Embodiment 1 | 30 | 3 | 21 | 0.7 |
| Embodiment 2 | 31 | 2.5 | 20 | 0.85 |
| Embodiment 3 | 32 | 2 | 19 | 1.0 |
The preparation method of the additive of above-mentioned raising RDI of Sinter, this method include：
1) dispensing, dolomite, magnesite, blast furnace slag, manganese oxide, vanadium oxide, titanium dioxide are weighed by proportioning, after mixing
Expect to once mixing, obtained secondary mix is expected after adding water to stir evenly in once mixing material, the secondary weight for mixing material component
Measuring percentage is：Dolomite 89~99%, magnesite 1~7%, blast furnace slag 1~3%, manganese oxide, vanadium oxide and titanium dioxide group
Point and for 0.7~1.0%, water≤1.0%；
2) additive finished product, finished product additive will be obtained after the secondary mixing material fine grinding described in step 1) using ball mill
Additive of the middle particle diameter less than 1.0mm accounts for more than the 95% of its total amount, and additive of the particle diameter less than 0.5mm accounts for its total amount
More than 75%, additive of the particle diameter less than 0.1mm accounts for more than the 20% of its total amount.
Table 2 is the raw material proportioning (by weight percentage) of additive of the embodiment of the present invention.
The raw material proportioning of 2 embodiment of the present invention of table, unit：Percentage by weight.
| Classification | Dolomite | Magnesite | Blast furnace slag | Manganese oxide+oxidation alum+titanium dioxide | Water |
| The present invention | 90~99 | 1~7 | 1~3 | 0.7~1.0 | ≤1.0 |
| Embodiment 1 | 89.3 | 6.8 | 3 | 0.7 | 0.2 |
| Embodiment 2 | 94.15 | 2.5 | 2 | 0.85 | 0.5 |
| Embodiment 3 | 96.5 | 1 | 1 | 1 | 0.5 |
Obtained by being added without additive and being sintered production with other raw materials for sintering (iron ore, fuel, flux, solid waste etc.)
Sinter, adds additive of the present invention and other raw materials for sintering (iron ore, fuel, flux, solid waste etc.) are sintered and produce
To sinter, sinter carries out low temperature dusting experiment, RDI of Sinter according to Chinese Industrial Standards (CIS) GB/T13241-91
Test data is shown in Table 3.
Table 3 adds the RDI of Sinter % (RDI+3.15) before and after additive of the embodiment of the present invention
As shown in table 3, if MgO mass contents are constant in sinter, sinter can be improved using additive of the present invention
Low temperature reduction degradation index, so as to improve upper blast furnace gas permeability, is conducive to reinforcing blast furnace smelting.If MgO mass in sinter
Content reduces, and the low temperature reduction degradation index of high MgO mass contents sinter can be made it have using additive of the present invention.
Not only improved using additive of the present invention and improve sinter hot strength, reduce the quantity of slag and energy consumption, while ensured again
Sinter low temperature reduction degradation index is unaffected.
In addition to the implementation, the present invention can also have other embodiment.It is all to use equivalent substitution or equivalent transformation shape
Into technical solution, all fall within the protection domains of application claims.
Claims (4)
1. a kind of additive for improving RDI of Sinter, it is characterized in that, the weight hundred of the additive constituent
Point ratio is：CaO 30~32%, SiO22~4%, MgO 15~25%, MnO2、V2O5、TiO2Component and for 0.7~
1.0%, remaining is scaling loss and inevitable impurity, and additive of the particle diameter less than 1.0mm accounts for more than the 95% of its total amount, particle diameter
Additive less than 0.5mm accounts for more than the 75% of its total amount, additive of the particle diameter less than 0.1mm account for the 20% of its total amount with
On.
2. a kind of additive for improving RDI of Sinter as claimed in claim 1, it is characterized in that, described adds
Agent is added to be matched somebody with somebody by dolomite, magnesite, blast furnace slag, manganese oxide, vanadium oxide, titanium dioxide, water these raw materials by claim 1 component
System.
3. a kind of compound additive for improving sinter low-temperature reduction disintegration energy as claimed in claim 2, it is characterized in that, institute
The percentage by weight for raw material its constituent stated is：Dolomite：CaO 30.0~35.0%, SiO22.0~3.0%, MgO
15.0~25.0%；Magnesite：CaO 1.0~2.0%, SiO23.0~4.0%, MgO 43~45%；Blast furnace slag：CaO 39
~41%, SiO233~35%, MgO 7~8%；Manganese oxide：MnO299%；Vanadium oxide：V2O599%；Titanium dioxide：TiO2
99%.
4. a kind of method of the additive of the raising RDI of Sinter prepared described in claim 1, this method bag
Include：
1) dispensing, weighs dolomite, magnesite, blast furnace slag, manganese oxide, vanadium oxide, titanium dioxide by proportioning, one is obtained after mixing
Secondary mix expects that obtained secondary mix is expected after adding water to stir evenly in once mixing material, the secondary weight hundred for mixing material component
Point ratio is：Dolomite 89~99%, magnesite 1~7%, blast furnace slag 1~3%, manganese oxide, vanadium oxide and titanium dioxide component
With for 0.7~1.0%, water≤1.0%；
2) additive finished product will be obtained using ball mill after the secondary mixing material fine grinding described in step 1), grain in finished product additive
Additive of the footpath less than 1.0mm accounts for more than the 95% of its total amount, additive of the particle diameter less than 0.5mm account for the 75% of its total amount with
On, additive of the particle diameter less than 0.1mm accounts for more than the 20% of its total amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610907959.2A CN107955880A (en) | 2016-10-18 | 2016-10-18 | A kind of additive for improving RDI of Sinter and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610907959.2A CN107955880A (en) | 2016-10-18 | 2016-10-18 | A kind of additive for improving RDI of Sinter and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN107955880A true CN107955880A (en) | 2018-04-24 |
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|---|---|---|---|
| CN201610907959.2A Pending CN107955880A (en) | 2016-10-18 | 2016-10-18 | A kind of additive for improving RDI of Sinter and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114605131A (en) * | 2022-02-16 | 2022-06-10 | 南阳师范学院 | Magnesium oxide acetate adhesive for cold consolidation forming of solid powder |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1664116A (en) * | 2005-02-02 | 2005-09-07 | 东北大学 | Iron making process in blast furnace and additives therefor |
| CN101172786A (en) * | 2007-10-30 | 2008-05-07 | 海城市华林矿业集团有限公司 | Rich magnesium dust strengthen sintering additive agent |
| CN101289697A (en) * | 2008-06-02 | 2008-10-22 | 攀钢集团攀枝花钢铁研究院有限公司 | Blast furnace ironmaking raw material and method for preparing same |
| CN101509066A (en) * | 2008-07-31 | 2009-08-19 | 龙文革 | High-efficiency energy-conservation sintering additive |
| CN102417974A (en) * | 2011-12-09 | 2012-04-18 | 内蒙古包钢钢联股份有限公司 | Preparation method of fluorine-containing low-silicon sintering ore |
-
2016
- 2016-10-18 CN CN201610907959.2A patent/CN107955880A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1664116A (en) * | 2005-02-02 | 2005-09-07 | 东北大学 | Iron making process in blast furnace and additives therefor |
| CN101172786A (en) * | 2007-10-30 | 2008-05-07 | 海城市华林矿业集团有限公司 | Rich magnesium dust strengthen sintering additive agent |
| CN101289697A (en) * | 2008-06-02 | 2008-10-22 | 攀钢集团攀枝花钢铁研究院有限公司 | Blast furnace ironmaking raw material and method for preparing same |
| CN101509066A (en) * | 2008-07-31 | 2009-08-19 | 龙文革 | High-efficiency energy-conservation sintering additive |
| CN102417974A (en) * | 2011-12-09 | 2012-04-18 | 内蒙古包钢钢联股份有限公司 | Preparation method of fluorine-containing low-silicon sintering ore |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114605131A (en) * | 2022-02-16 | 2022-06-10 | 南阳师范学院 | Magnesium oxide acetate adhesive for cold consolidation forming of solid powder |
| CN114605131B (en) * | 2022-02-16 | 2023-11-14 | 南阳师范学院 | Magnesium oxide acetate adhesive for cold consolidation molding of solid powder |
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