CN100584959C - High-titanium protection stove pellet ore and preparation thereof - Google Patents
High-titanium protection stove pellet ore and preparation thereof Download PDFInfo
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- CN100584959C CN100584959C CN200810304188A CN200810304188A CN100584959C CN 100584959 C CN100584959 C CN 100584959C CN 200810304188 A CN200810304188 A CN 200810304188A CN 200810304188 A CN200810304188 A CN 200810304188A CN 100584959 C CN100584959 C CN 100584959C
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- titanium
- protection stove
- pellet ore
- tio
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- 239000010936 titanium Substances 0.000 title claims abstract description 78
- 229910052719 titanium Inorganic materials 0.000 title claims abstract description 74
- 239000008188 pellet Substances 0.000 title claims abstract description 63
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000002994 raw material Substances 0.000 claims abstract description 26
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims abstract description 5
- 239000012141 concentrate Substances 0.000 claims description 27
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 15
- YDZQQRWRVYGNER-UHFFFAOYSA-N iron;titanium;trihydrate Chemical compound O.O.O.[Ti].[Fe] YDZQQRWRVYGNER-UHFFFAOYSA-N 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 239000003546 flue gas Substances 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract description 23
- 230000000694 effects Effects 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 21
- 239000004408 titanium dioxide Substances 0.000 description 10
- 238000005259 measurement Methods 0.000 description 9
- 229910052742 iron Inorganic materials 0.000 description 7
- 239000000292 calcium oxide Substances 0.000 description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 4
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000003223 protective agent Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229960001866 silicon dioxide Drugs 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000003746 solid phase reaction Methods 0.000 description 1
- 238000010671 solid-state reaction Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 150000003609 titanium compounds Chemical class 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to a high titanium furnace-protecting pellet and a preparation method thereof, belonging to the metallurgical field. The invention solves the technical problem of providing a high titanium furnace-protecting pellet with titanic oxide content of more than 15 percent and the preparation method thereof. The high purity titanium furnace-protecting pellet comprises 15 percent to 35 percent of TiO2 content and 35 percent to 50 percent of TFe content, and the preparation method comprises the steps of raw material mixing, pellet fabricating, roasting and cooling. When the high titanium furnace-protecting pellet is used for blast furnace ironmaking, the furnace protection effect is good, the service life of the blast furnace can be effectively prolonged, and the application prospect is extensive.
Description
Technical field
The present invention relates to high-titanium protection stove pellet ore and preparation method thereof, belong to field of metallurgy.
Background technology
Along with the development of China's Iron And Steel Industry, the blast furnace of each big steel enterprise to maximize, efficient, low consumption, long-lived target development.It is one of important measures that realize above-mentioned target that blast-furnace smelting adopts advanced titanium furnace retaining technology.
The furnace retaining mechanism of titanium furnace retaining technology is: the titaniferous furnace charge is gone into stove and is reduced to Ti; enter molten iron; make the supersaturation molten iron separate out Ti (CN); be etched the place for groove position, thereby it is mild that molten iron is flowed, will residual Ti (CN) crystal grain; that recess is mended is flat because of the reason of thermograde; make the refractory brick of semi-melting state cover one deck 1-2mmTi (CN), this titanium compound crystal grain fusing point height, thus make the cupola well furnace bottom obtain protection.
Titanium furnace retaining technique functions comes from the Japan of the seventies in 20th century, has experienced the natural ore deposit of interpolation titaniferous, titanium-containing blast furnace slag, has contained the Ti cold curing pellet ore deposit, the contrast course of several methods such as titaniferous roasting pellet.Because titaniferous roasting pellet solved the drawback that blast furnace is eaten raw material, make furnace protecting agent become normal pellet and go into stove, guarantee blast furnace steady running, become the blast furnace prolongs life, improve combustion intensity, fall Jiao, increase one of the most effective means of iron.
At present, the production method of common titanium protection stove pellet ore is: adopting single sefstromite concentrate is raw material, in 1050～1200 ℃ of following roasting 0.5～1h, is incubated 1～2h then, and oxygen content is about 4～7% in the baking flue gas.The main chemical compositions of sefstromite concentrate sees Table 1.
The main chemical compositions of table 1 sefstromite concentrate (%)
Because adopt single raw material to produce, product content of titanium dioxide not high (usually below 14%) can not be adjusted by different user demands.In addition, because the China's titanium uneven geographical distribution of resources, Panxi Diqu titanium dioxide reserves account for 90% of national total amount, promote the use of titanium protection stove pellet ore away from Panxi Diqu, if content of titanium dioxide is not high will to cause the transportation cost height, limited this furnace retaining The Application of Technology.If produce high-titanium protection stove pellet ore, need overcome following technical barrier:
1, along with the raising of content of titanium dioxide in the high-titanium protection stove pellet ore, iron level must descend in the pellet, causes Fe in the green-ball
3O
4Content descends, and forms newborn rhombohedral iron ore (Fe in the oxidizing roasting process
2O
3) total amount also descends, thereby influence Fe
2O
3Recrystallize connects, and has reduced pellet strength.
2, the basic oxide that also contain some amount in the gangue of the vanadium titano-magnetite of Panzhihua Region storage except that titanium dioxide, silicon-dioxide, aluminium sesquioxide acidic oxidation beyond the region of objective existence, as: calcium oxide and magnesium oxide etc.The low-melting 2FeOSiO that in the pellet roasting process, produces
2Easy and these basic oxide react, and form the lower material of fusing point, cause production process " sticking stove " accident.
Up to the present, do not see high-titanium protection stove pellet ore is arranged (content of titanium dioxide is more than 15%) relevant report of producing, more do not see the report that has high-titanium protection stove pellet ore to be used for blast-furnace smelting.
Summary of the invention
It is high-titanium protection stove pellet ore more than 15% that first technical problem to be solved by this invention provides a kind of content of titanium dioxide.
High-titanium protection stove pellet ore of the present invention, its TiO
2Content is 15～35%, and TFe content (being total Fe constituent content) is 35～50%.
Further, TiO in the above-mentioned high-titanium protection stove pellet ore
2Content is 16～35%.
Further, TiO in the above-mentioned high-titanium protection stove pellet ore
2Content is 20～30%.
Wherein, above-mentioned high-titanium protection stove pellet ore can be that feedstock production forms by multiple titaniferous ore, the total TiO of titaniferous ore
2Content is satisfied the demand and is got final product.For the ease of feed proportioning, and make full use of the China's titanium resource, above-mentioned high-titanium protection stove pellet ore is preferably formed by the feedstock production of following weight parts: 30～88 parts of sefstromite concentrates, 6～70 parts of ilmenite concentrates; Wherein, TFe content is 53～56% in the described sefstromite concentrate, TiO
2Content is 10～13.5%; TFe content is 30～35% in the described ilmenite concentrate, TiO
2Content is 42～49%.
Further, above-mentioned high-titanium protection stove pellet ore can also add in its raw material≤the titanium chats of 20 weight parts, and TFe content is 19～28% in the described titanium chats, TiO
2Content is 18～25%.
Second technical problem to be solved by this invention provides a kind of preparation method of above-mentioned high-titanium protection stove pellet ore, and this method comprises the steps:
A, feed proportioning: by the TiO in the required high-titanium protection stove pellet ore
2Content carries out the titanium ore batching, and controls CaO total content≤2.5% in each raw material;
B, make ball: with the raw material blending of a step and make ball;
C, roasting: in 1100～1300 ℃ of following roasting 30～60min, keep then protecting 1100～1250 ℃ of temperature 75～170min, oxygen content is 8～10% in the baking flue gas;
D, cooling promptly get high-titanium protection stove pellet ore.
Solid state reaction can take place in titanium dioxide and calcium oxide in roasting process, generate the uhligite of fusing point height (about 1900 ℃), and a step is by controlling the calcium oxide content that each raw material is brought into, and may command low melting point growing amount is in order to avoid pellet strength reduces.Can come the content of controlled oxidation calcium by ordinary methods such as Optimization Ore Matching, washed ores.
Wherein, the raw material described in a step is prepared burden by following weight proportion: 30～88 parts of sefstromite concentrates, 6～70 parts of ilmenite concentrates; Wherein, TFe content is 53～56% in the described sefstromite concentrate, TiO
2Content is 10～13.5%; TFe content is 30～35% in the described ilmenite concentrate, TiO
2Content is 42～49%.
Wherein, also add the titanium chats of≤20 weight parts in the described raw material of above-mentioned a step, TFe content is 19～28% in the described titanium chats, TiO
2Content is 18～25%.
Wherein, above-mentioned b step make ball according to a conventional method mixing, make ball and get final product.
Oxygen content is higher in the baking flue gas in the c step, thereby can be oxidized to Fe to the low price ferriferous oxide in the ore to greatest extent
2O
3, reduced low-melting 2FeOSiO
2Form, and help developing Fe
2O
3Recrystallize connects.Maturing temperature in the c step is higher, and soaking time is longer, can make Fe
2O
3Recrystallize connects fully development, to guarantee high-titanium protection stove pellet ore intensity.According to the content of titanium dioxide difference, the maturing temperature difference of high-titanium protection stove pellet ore, content of titanium dioxide is high more, and maturing temperature is high more.
After the above-mentioned d step cooling, can obtain the high-titanium protection stove pellet ore that granularity is 8mm～25mm.
The beneficial effect of high-titanium protection stove pellet ore of the present invention is: the transportation cost that has reduced titanium protection stove pellet ore; Help making full use of of China's titanium resource; Its epigranular, intensity height, powder is few, Well-recovered, furnace retaining is effective, sticking stove, can more effectively improve blast furnace campaign, has broad application prospects.
Embodiment
Below in conjunction with embodiment the specific embodiment of the present invention is further described.
With sefstromite concentrate, ilmenite concentrate, titanium chats is raw material, prepares high-titanium protection stove pellet ore of the present invention, and each raw material main chemical compositions is as described in Table 2:
Table 2 raw material main chemical compositions
The preparation of embodiment 1 high-titanium protection stove pellet ore of the present invention
With sefstromite concentrate in the table 2 and ilmenite concentrate is that raw material is prepared burden, and presses the inventive method roasting then, and the high-titanium protection stove pellet ore of preparation is carried out performance measurement.The high-titanium protection stove pellet ore performance measurement when of specifically preparing burden the results are shown in Table 3.
Table 3 high-titanium protection stove pellet ore proportioning raw materials and performance measurement
The preparation of embodiment 2 high-titanium protection stove pellet ores of the present invention
With the sefstromite concentrate in the table 2, ilmenite concentrate and titanium chats is that raw material is prepared burden, and presses the inventive method roasting then, and the high-titanium protection stove pellet ore of preparation is carried out performance measurement.The high-titanium protection stove pellet ore performance measurement when of specifically preparing burden the results are shown in Table 4.
Table 4 high-titanium protection stove pellet ore proportioning raw materials and performance measurement (TiO
2Content is about 20%)
The preparation of embodiment 3 high-titanium protection stove pellet ores of the present invention
With the sefstromite concentrate in the table 2, ilmenite concentrate and titanium chats is that raw material is prepared burden, and presses the inventive method roasting then, and the high-titanium protection stove pellet ore of preparation is carried out performance measurement.The high-titanium protection stove pellet ore performance measurement when of specifically preparing burden the results are shown in Table 5.
Table 5 high-titanium protection stove pellet ore proportioning raw materials and performance measurement (TiO
2Content is about 16.5%)
From table 3,4,5 as can be seen, the tumbler index of high-titanium protection stove pellet ore of the present invention (GB8209) can reach more than 85%, ultimate compression strength 〉=1800N/ ball, not sticking stove in the production.
Claims (6)
1, high-titanium protection stove pellet ore is characterized in that: TiO in the pellet
2Content is 20～30%, and TFe content is 35～50%;
Wherein, described high-titanium protection stove pellet ore adopts following method preparation and gets:
A, feed proportioning: by the TiO in the required high-titanium protection stove pellet ore
2Content carries out the titanium ore batching, and controls CaO total content≤2.5% in each raw material;
B, make ball: with the raw material blending of a step and make ball;
C, roasting: in 1100～1300 ℃ of following roasting 30～60min, keep then protecting 1100～1250 ℃ of temperature 75～170min, oxygen content is 8～10% in the baking flue gas;
D, cooling promptly get high-titanium protection stove pellet ore.
2, high-titanium protection stove pellet ore according to claim 1 is characterized in that: be that feedstock production by following weight parts forms: 30～88 parts of sefstromite concentrates, 6～70 parts of ilmenite concentrates; Wherein, TFe content is 53～56% in the described sefstromite concentrate, TiO
2Content is 10～13.5%; TFe content is 30～35% in the described ilmenite concentrate, TiO
2Content is 42～49%.
3, high-titanium protection stove pellet ore according to claim 2 is characterized in that: also add the titanium chats of≤20 weight parts in the described raw material, TFe content is 19～28% in the described titanium chats, TiO
2Content is 18～25%.
4, the preparation method of each described high-titanium protection stove pellet ore of claim 1～3 is characterized in that: comprise the steps:
A, feed proportioning: by the TiO in the required high-titanium protection stove pellet ore
2Content carries out the titanium ore batching, and controls CaO total content≤2.5% in each raw material;
B, make ball: with the raw material blending of a step and make ball;
C, roasting: in 1100～1300 ℃ of following roasting 30～60min, keep then protecting 1100～1250 ℃ of temperature 75～170min, oxygen content is 8～10% in the baking flue gas;
D, cooling promptly get high-titanium protection stove pellet ore.
5, the preparation method of high-titanium protection stove pellet ore according to claim 4 is characterized in that: the raw material described in a step is prepared burden by following weight proportion: 30～88 parts of sefstromite concentrates, 6～70 parts of ilmenite concentrates; Wherein, TFe content is 53～56% in the described sefstromite concentrate, TiO
2Content is 10～13.5%; TFe content is 30～35% in the described ilmenite concentrate, TiO
2Content is 42～49%.
6, the preparation method of high-titanium protection stove pellet ore according to claim 5 is characterized in that: also add the titanium chats of≤20 weight parts in the described raw material described in a step, TFe content is 19～28% in the described titanium chats, TiO
2Content is 18～25%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810304188A CN100584959C (en) | 2008-08-26 | 2008-08-26 | High-titanium protection stove pellet ore and preparation thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810304188A CN100584959C (en) | 2008-08-26 | 2008-08-26 | High-titanium protection stove pellet ore and preparation thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101343674A CN101343674A (en) | 2009-01-14 |
| CN100584959C true CN100584959C (en) | 2010-01-27 |
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|---|---|---|---|
| CN200810304188A Expired - Fee Related CN100584959C (en) | 2008-08-26 | 2008-08-26 | High-titanium protection stove pellet ore and preparation thereof |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101805194B (en) * | 2010-03-13 | 2013-05-08 | 闫晓峰 | Furnace protecting agent for titanium concentrate sintering and preparation method thereof |
| CN102399998B (en) * | 2011-11-18 | 2014-03-26 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for reducing and smelting titania slag by utilizing vanadium-titanium-iron ore concentrates in molten state |
| CN102417944B (en) * | 2011-11-18 | 2013-11-27 | 攀钢集团研究院有限公司 | Method for utilizing vanadium-titanium-secondary iron concentrate to smelt acid-soluble titanium slag by way of smelting reduction |
| CN105483368A (en) * | 2015-12-09 | 2016-04-13 | 攀枝花钢企米易白马球团有限公司 | Processing method for production raw material of high-titaniferous oxidized pellets |
| CN105714109B (en) * | 2016-04-12 | 2018-02-02 | 中南大学 | A kind of preparation method of the high titanium pelletizing of high intensity |
| CN108220513A (en) * | 2017-12-26 | 2018-06-29 | 柳州钢铁股份有限公司 | Energy Conservation of Blast Furnace furnace retaining method |
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