CN102816924A - Ore blending method for improving heat-state intensity index of sintering ore - Google Patents
Ore blending method for improving heat-state intensity index of sintering ore Download PDFInfo
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- CN102816924A CN102816924A CN2012103576856A CN201210357685A CN102816924A CN 102816924 A CN102816924 A CN 102816924A CN 2012103576856 A CN2012103576856 A CN 2012103576856A CN 201210357685 A CN201210357685 A CN 201210357685A CN 102816924 A CN102816924 A CN 102816924A
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- ground hematite
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Abstract
The invention provides an ore blending method for improving a heat-state intensity index of a sintering ore. The ore is prepared from the following raw materials in percentage by weight: 66-88 percent of hematite powder, 5-15 percent of magnet ore powder, 3-12 percent of ludwigite concentrate fines, and 4-7 percent of mixed material; the ludwigite concentrate fines comprise the main components in percentage by weight: 52-54 percent of TFe, 20-24 percent of FeO, 4-6 percent of SiO, 0.5-1.0 percent of CaO, 10-13 percent of MgO, 0.2-0.4 percent of Al2O3, 3-5 percent of B2O3, 0.3-0.5 percent of S, 3-5 percent of burning loss Ig and 1.0-1.5 percent of crystal water. According to the ore blending method, the heat-state intensity index of the sintering ore can be obviously improved, and low-temperature reduction degradation ratio of the sintering ore is reduced on the premise that the requirements of a blast furnace on the grade of the sintering ore and the alkalinity can be completely met. The low-temperature reduction degradation index RDI+3.15mm of the sintering ore reaches an average of 62.92 percent, and the low-temperature reduction degradation index RDI-0.5mm reaches 7.11 percent, so that the smooth operation of the production of the blast furnace can be guaranteed, the yield of the blast furnace is improved, and the coke ratio is reduced.
Description
Technical field
The invention belongs to the SINTERING PRODUCTION technology field, relate in particular to a kind of import ground hematite that uses and produce the ore-proportioning method that agglomerate improves the hot strength index.
Background technology
Along with the increase day by day of sintering production capacity, domestic self-produced iron-bearing material has satisfied not the demand of SINTERING PRODUCTION far away, thereby SINTERING PRODUCTION has to use in a large number the import rich ore powder.At present, the import rich ore powder mainly is to derive from countries such as Brazil, Australia, South Africa and India.Because the import rich ore powder mainly is by Fe
2O
3The rhombohedral iron ore that becomes to be grouped into, and Al
2O
3Content is higher, causes agglomerate hot strength index to descend, and blast-furnace smelting condition variation directly influences the output and the coke ratio of blast furnace.
Under normal SINTERING PRODUCTION situation,, the finished product agglomerate is implemented to spray calcium chloride technology improve the hot index of agglomerate through improving sintering mine FeO content.But the control of sintering mine FeO content is too high, except that fuel consumption raises, also can cause the RI of agglomerate to descend, and influences furnace processor and coke ratio.Simultaneously the finished product agglomerate is implemented to spray calcium chloride technology, not only influence the blast furnace screening system, and seriously shortened the work-ing life of blast furnace dedusting device.
Summary of the invention
The object of the invention aims to provide a kind of simple, can significantly improve agglomerate hot strength index satisfying under the prerequisite of blast furnace to grade of sinter and basicity requirement, reduces the ore-proportioning method of agglomerate low temperature reduction degradation index.
For this reason, the technical solution that the present invention taked is:
A kind of ore-proportioning method that improves agglomerate hot strength index; It is characterized in that; Through in the agglomerate raw material, replacing homemade iron ore concentrate or import rich ore powder with addition of boron magnesium fine iron breeze, improve agglomerate hot strength index, its concrete raw material is joined the ore deposit weight percent and is:
Ground hematite 66-88%, magnetite powder 5-15%, boron magnesium fine iron breeze 3-12%, compound 4-7%;
Said boron magnesium fine iron breeze staple weight percentage is:
TFe 52-54%, FeO 20-24%, SiO
24-6%, CaO 0.5-1.0%, MgO 10-13%, Al
2O
30.2-0.4%, B
2O
33-5%, S 0.3-0.5%, scaling loss Ig 3-5%, crystal water 1.0-1.5%.
Said ground hematite comprises SiO
2>=5% high silicon ground hematite and Si O
2In＜5% the low silicon ground hematite one or more.
Said sinter basicity R=2.1, MgO=2.0wt%.
The additional proportion that said Brazil produces high silicon ground hematite and low silicon ground hematite is 1:1.
Beneficial effect of the present invention is:
The present invention can significantly improve agglomerate hot strength index satisfying fully under the prerequisite of blast furnace to grade of sinter and basicity requirement, reduces the agglomerate low temperature reduction degradation index.Through actual detected, adopt the present invention after agglomerate low temperature reduction degradation index RDI+3.15mm on average reach 62.92%, improved 5.73% than 57.19% before the embodiment of the present invention not; Low temperature reduction degradation index RDI-0.5mm reaches 7.11%, has reduced by 1.41% than 8.52% before the embodiment of the present invention not, has greatly guaranteed the direct motion that blast furnace is produced, and very helps improving furnace processor and reduces coke ratio.
Embodiment
Embodiment 1:
Ground hematite selects for use Brazil to produce Si O
2>=5% high silicon ground hematite and Si O
2＜5% low silicon ground hematite.Sinter basicity R=2.1, MgO=2.0wt%.Boron magnesium fine iron breeze staple weight percentage is: TFe 52.1%, and FeO 23.4%, SiO
24.5%, CaO 0.5%, and MgO 12.2%, Al
2O
30.4%, B
2O
33.4%, S 0.4%, and scaling loss Ig 3.3%, crystal water 1.4%.
Its raw material is joined the ore deposit weight percent:
Brazil produces high silicon ground hematite 35%, low silicon ground hematite 35%, magnetite powder 15%, boron magnesium fine iron breeze 8%, compound 7%.
Embodiment 2:
The ground hematite that ground hematite selects for use Australian Ha Mosili ore deposit, Mike ore deposit, Newman ore deposit to produce.Sinter basicity R=2.1, MgO=2.0wt%.Boron magnesium fine iron breeze staple weight percentage is: TFe 54%, and FeO 21.6%, SiO
25.5%, CaO 0.7%, and MgO 10.3%, Al
2O
30.2%, B
2O
34.8%, S 0.3%, and scaling loss Ig 4.4%, crystal water 1.0%.
Its raw material is joined the ore deposit weight percent:
Ha Mosili breeze 30%, Mike's breeze 27%, Newman breeze 28%, magnetite powder 5%, boron magnesium fine iron breeze 5%, compound 5%.
Embodiment 3:
Ground hematite selects for use Brazil to produce Si O
2>=5% high silicon ground hematite and Si O
2The ground hematite that＜5% low silicon ground hematite, Australian Ha Mosili ore deposit, Mike ore deposit, Newman ore deposit produce.Sinter basicity R=2.1, MgO=2.0wt%.Boron magnesium fine iron breeze staple weight percentage is: TFe 52.6%, and FeO 22.2%, SiO
24.9%, CaO 0.66%, and MgO 11.4%, Al
2O
30.26%, B
2O
33.5%, S 0.44%, scaling loss Ig3.85%, crystal water 1.2%.
Its raw material is joined the ore deposit weight percent:
The high silicon ground hematite 12.5% of Brazil, low silicon ground hematite 12.5%, Ha Mosili breeze 35%, Mike's breeze 10%, Newman breeze 10%, magnetite powder 5%, boron magnesium fine iron breeze 10%, compound 5%.
Claims (4)
1. ore-proportioning method that improves agglomerate hot strength index; It is characterized in that; Through in the agglomerate raw material, replacing homemade iron ore concentrate or import rich ore powder with addition of boron magnesium fine iron breeze, improve agglomerate hot strength index, its concrete raw material is joined the ore deposit weight percent and is:
Ground hematite 66-88%, magnetite powder 5-15%, boron magnesium fine iron breeze 3-12%, compound 4-7%;
Said boron magnesium fine iron breeze staple weight percentage is:
TFe 52-54%, FeO 20-24%, SiO
24-6%, CaO 0.5-1.0%, MgO 10-13%, Al
2O
30.2-0.4%, B
2O
33-5%, S 0.3-0.5%, Ig 3-5%, crystal water 1.0-1.5%.
2. the ore-proportioning method that improves agglomerate hot strength index according to claim 1 is characterized in that said ground hematite comprises Si O
2>=5% high silicon ground hematite and Si O
2In＜5% the low silicon ground hematite one or more.
3. the ore-proportioning method that improves agglomerate hot strength index according to claim 1 is characterized in that, said sinter basicity R=2.1, MgO=2.0wt%.
4. the ore-proportioning method that improves agglomerate hot strength index according to claim 2 is characterized in that, the additional proportion of said high silicon ground hematite and low silicon ground hematite is 1:1.
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| CN2012103576856A CN102816924A (en) | 2012-09-25 | 2012-09-25 | Ore blending method for improving heat-state intensity index of sintering ore |
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| CN2012103576856A CN102816924A (en) | 2012-09-25 | 2012-09-25 | Ore blending method for improving heat-state intensity index of sintering ore |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104451130A (en) * | 2014-12-02 | 2015-03-25 | 阜新蒙古族自治县晟宇铸造有限公司 | Ironmaking additive and use method thereof |
| CN106544500A (en) * | 2015-09-17 | 2017-03-29 | 攀钢冶金材料有限责任公司 | A kind of composite assistant and its preparation method and application |
| CN107365907A (en) * | 2017-06-27 | 2017-11-21 | 西安建筑科技大学 | A kind of method for improving iron ore sintering mine low temperature reduction degradation |
| CN109161680A (en) * | 2018-10-03 | 2019-01-08 | 张家港宏昌钢板有限公司 | The segregation ore matching sintering method of iron ore |
| CN113088685A (en) * | 2021-02-21 | 2021-07-09 | 阳春新钢铁有限责任公司 | Sintering ore blending method for improving low-temperature reduction powdering performance of sintered ore |
| CN113215391A (en) * | 2021-04-13 | 2021-08-06 | 陕西龙门钢铁有限责任公司 | Ore blending method based on sinter metallurgy performance |
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| CN85100645A (en) * | 1985-04-01 | 1986-01-10 | 鞍山钢铁公司 | Double-sphere sintering technology |
| CN1096329A (en) * | 1993-12-17 | 1994-12-14 | 南京第二钢铁厂 | The method of low-temperature sintering rhombohedral iron ore and brown ocher |
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| CN101045955A (en) * | 2007-04-28 | 2007-10-03 | 中南大学 | Process of preparing iron smelting pellet with hematite concentrate |
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| CN102181630A (en) * | 2011-04-12 | 2011-09-14 | 首钢总公司 | Method for using paigeite powder in sintering |
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2012
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| CN85100645A (en) * | 1985-04-01 | 1986-01-10 | 鞍山钢铁公司 | Double-sphere sintering technology |
| CN1096329A (en) * | 1993-12-17 | 1994-12-14 | 南京第二钢铁厂 | The method of low-temperature sintering rhombohedral iron ore and brown ocher |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104451130A (en) * | 2014-12-02 | 2015-03-25 | 阜新蒙古族自治县晟宇铸造有限公司 | Ironmaking additive and use method thereof |
| CN106544500A (en) * | 2015-09-17 | 2017-03-29 | 攀钢冶金材料有限责任公司 | A kind of composite assistant and its preparation method and application |
| CN106544500B (en) * | 2015-09-17 | 2018-07-24 | 攀钢冶金材料有限责任公司 | A kind of composite assistant and its preparation method and application |
| CN107365907A (en) * | 2017-06-27 | 2017-11-21 | 西安建筑科技大学 | A kind of method for improving iron ore sintering mine low temperature reduction degradation |
| CN107365907B (en) * | 2017-06-27 | 2019-01-11 | 西安建筑科技大学 | A method of improving iron ore sintering mine low temperature reduction degradation |
| CN109161680A (en) * | 2018-10-03 | 2019-01-08 | 张家港宏昌钢板有限公司 | The segregation ore matching sintering method of iron ore |
| CN109161680B (en) * | 2018-10-03 | 2020-05-22 | 张家港宏昌钢板有限公司 | Segregation ore blending sintering method for iron ore |
| CN113088685A (en) * | 2021-02-21 | 2021-07-09 | 阳春新钢铁有限责任公司 | Sintering ore blending method for improving low-temperature reduction powdering performance of sintered ore |
| CN113215391A (en) * | 2021-04-13 | 2021-08-06 | 陕西龙门钢铁有限责任公司 | Ore blending method based on sinter metallurgy performance |
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Application publication date: 20121212 |