CN101476001B - Method for smelting medium titanium slag by blast furnace - Google Patents
Method for smelting medium titanium slag by blast furnace Download PDFInfo
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- CN101476001B CN101476001B CN2008103063524A CN200810306352A CN101476001B CN 101476001 B CN101476001 B CN 101476001B CN 2008103063524 A CN2008103063524 A CN 2008103063524A CN 200810306352 A CN200810306352 A CN 200810306352A CN 101476001 B CN101476001 B CN 101476001B
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Abstract
The invention belongs to the field of middle titanium slag melting technology, specifically to a middle titanium slag blast furnace smelting method. The technical problems the invention object to resolve is to provide a middle titanium slag melting method in a medium-sized blast furnace, the method can have a better use of schreyerite resources to perform middle titanium slag melting, specifically adopting 25 - 30 parts of all-vanadium-titanium pellet ore, 65 - 70 parts of low-vanadium-titanium magnetite ore and 5 - 10 parts of lump ore as raw materials for smelting in blast furnace. Obtained cast iron satisfies the quality requirements for further steelmaking, the furnace cinder dyadic alkalinity is 1.15 - 1.30, and can be used raw material of the composite powder. The method of the invention uses an appropriate charging stock structure in the blast furnace to reduce the sintering powder and to improve the air permeability, and makes full use of high cost-effective of schreyerite to effectively reduce production costs.
Description
Technical field
Titanium slag technical field of smelting, the particularly method of titanium slag in the blast-furnace smelting in the invention belongs to.
Background technology
Raw materials quality and stability that the titanium slag smelting needs are very high, and is therefore huge to the quantity required of schreyerite resource, and the difficulty of probability that the smelting process difficulty is big, accidents happened and processing accident is also bigger.Because the schreyerite maldistribution of the resources, and high-quality ore output is few, and domestic have only minority enterprise can carry out the titanium slag smelting for a long time.For most of ore resources poornesss, comprehensively go into the lower iron and steel enterprise of stove grade, suitably use part schreyerite resource to carry out " middle titanium slag smelting ", have than common and practical.
The ore that titanium slag is smelted in carrying out exists usually and contains TiO
2Lower, contain higher, the comprehensive ore grade of vanadium and have only characteristics such as about 50%.Each enterprise's smelting process differs greatly at present, and the quantity of slag is big, big, the high difficulty of iron loss of slag treatment difficulty but mostly have.Therefore being badly in need of researching and developing the smelting process that makes new advances makes the schreyerite resource obtain better industry utilization.
Summary of the invention
Technical problem to be solved by this invention provides the method for titanium slag in a kind of blast-furnace smelting, and this method can utilize the schreyerite resource to carry out middle titanium slag smelting preferably, reduces production costs.
Technical scheme of the present invention is that 25～30 parts full vanadium titanium globe ore deposit, 65～70 parts low vanadium titanium agglomerate and 5～10 parts lump ore (virgin iron ore) are raw material, adds fuel and smelts in blast furnace.
The chemical ingredients of each feed composition sees Table 1:
Table 1 unit: weight percent, %
| Title | TFe | FeO | SiO 2 | CaO | TiO 2 |
| Full vanadium titanium globe ore deposit | 52～54 | 0.4～0.5 | 5～6 | 1.5～2.0 | 11.5～12.5 |
| Contain vanadium titanium agglomerate | 47～52 | 7～9.5 | 5～7 | 13～16 | 1.0～3.5 |
| Lump ore | 50～60 | 0～10 | 3.5～15.5 | 0～8 | 0 |
Described fuel is coke and coal dust, and coke raw material add-on per ton is 450～480Kg, and coal dust raw material add-on per ton is 120～140Kg, coke ash should be less than 13.5%, secondary coke ratio should be greater than 60%, and going into oven coke ash content standard deviation should be less than 0.5%, and coal powder fraction should be less than 15%.
Blast furnace ironmaking process adopts medium-sized stove to smelt, and its operating parameters is controlled to be: air quantity 65000～75000m
3/ h, 1100～1150 ℃ of wind-warm syndrome, blast energy should remain on 48～52KJ/s.Add oxygen in the blast furnace blast air, oxygen enrichment percentage is in 2.5～3% (volume ratios), pressure reduction is 115～125KPa, coal powder injection is than 120～140Kg/t, [Si] content is 0.2～0.3% in the molten iron, and [Si]+[Ti] content is 0.4%～0.6%, and [S] content is 0.050～0.065%, 50～60 minutes slag time on the every stove of blast furnace, integrated smelting intensity is at 1.65t/m
3More than the d, molten iron temperature is 1420～1460 ℃, and the pig iron that makes satisfies further steelmaking quality requirement.If adopt the blast furnace of other models to smelt, those skilled in the art can select suitable operating parameters to get final product according to the blast furnace of different model.
TiO in the slag
2Content 15～18%, Al
2O
3Content 12～14%, MgO content 8～10%, slag dual alkalinity 1.15～1.30, this slag all are the flush slag mode of production, grain slag can be used as the raw material of cement, composite micro-powder.
The invention has the beneficial effects as follows:
(1), in blast furnace, adopts suitable burden structure, the sefstromite concentrate powder is with addition of in shaft furnace pellet and agglomerate, wherein in pellet, all use vanadium ilmenite concentrate powder, in agglomerate with addition of the vanadium ilmenite concentrate powder of 20-30%, thereby reduce the agglomerate low temperature reduction degradation index, improve sinter strength, reduce sintered powder, improve blast furnace permeability; Simultaneously, shaft furnace and sinter machine also can keep higher production level.
(2), by to the adjustment of blast furnace operating parameter, it is smooth to make schreyerite smelt, thus output improves, consumes and reduce, and reduces production costs effectively.
(3), slag treatment is by traditional flush slag mode, the iron resources in can partially recycled slag, and make slag be applicable to that cement adds, makes building material mades such as micro mist, makes that blast furnace slag is all effectively utilized.
Embodiment
Following is the preparation method of full vanadium titanium globe ore deposit and low vanadium titanium agglomerate:
One, the preparation of low vanadium titanium agglomerate:
Compound batching: sefstromite concentrate powder 20～30%, domestic general breeze 15～25%, common fine ore 15～25%, roll scale 3～5%, import breeze 20～40% and other iron-contained industrial waste.30 square meter sinter machine air quantity are 2400～2500 cubic metres/minute, and 105 square meter sinter machine air quantity are 9000～10000 cubic metres/minute; Adding moisture is about 6% of compound weight; Fixed carbon is controlled at about 2.8% in the compound.Low vanadium titanium agglomerate finished product contains SiO
25%～7%, sinter basicity 2.20～2.70.
The main chemical compositions of raw material sees Table 2:
Table 2 material chemical component list position: weight percent, %
| Title | TFe | FeO | SiO 2 | CaO | TiO 2 |
| The sefstromite concentrate powder | 52～57 | 28～33 | 3.5～4 | 1～2 | 11～13 |
| Domestic general breeze | 45～55 | 0～10 | 3.5～16.5 | 0.5～8.5 | 0 |
| Common fine ore | 58～68 | 20～28 | 3.5～7 | 1.1～2.3 | 0～1 |
| Roll scale | 60～70 | 20～35 | 0 | 0 | 0 |
| The import breeze | 60～62 | 0～10 | 3～4.5 | 0 | 0 |
Two, the preparation in full vanadium titanium globe ore deposit:
With all-sefstromite concentrate with addition of the wilkinite of its weight 1.2～1.5% as raw material blending, dehydration, the compound after the dehydration is sent into profit mill in the damp mill, enters balling disc again and makes ball.The green-ball cloth that sieves out diameter 8～16mm is to the shaft furnace drying bed, 500～550 ℃ of dry 5min, green-ball after the oven dry is put into shaft furnace preheating and baking section preheating (850～950 ℃ of temperature), the high-temperature roasting temperature is controlled at 1030 ℃, reaction times 30～60min promptly gets all-sefstromite concentrate pellet ore after the cooling for the second time through being put into behind the stove internal cooling on the belt-cooling machine.This all-sefstromite concentrate pellet ore pelletizing ultimate compression strength 2200N/.
The main raw material chemical ingredients is as follows:
Table 3 material chemical component list position: weight percent, %
| Title | TFe | FeO | SiO 2 | CaO | TiO 2 |
| Sefstromite concentrate | 52～57 | 28～33 | 3.5～4 | 1～2 | 11～13 |
The invention will be further elaborated below in conjunction with embodiment.Embodiment only is used to illustrate the present invention, rather than limits the present invention by any way.
The preparation of embodiment 1 low vanadium titanium agglomerate
The smart powder 25% of vanadium titanium, all the other raw materials are domestic general powder 30%, common smart powder 15%, roll scale 5%, import powder 22%, other iron-contained industrial waste 3%.
Schreyerite sintering characteristics: 30 square meter sinter machine air quantity are 2450 cubic metres/minute, and 105 sinter machine air quantity are 9500 cubic metres/minute; Moisture 6%; Compound fixed carbon 2.8%.
Low vanadium titanium agglomerate finished product contains SiO
26%, sinter basicity 2.40, agglomerate TiO
22.6%.
The preparation in embodiment 2 full vanadium titanium globe ore deposits
With all-sefstromite concentrate, efficient wilkinite by 98.6: 1.4 proportioning by behind the belted electronic balance automatic blending, enter through belt transportation and to carry out mixing, dehydration in the drum dry mixing machine, mixture moisture after mixing, the dehydration is about 5%, send into profit mill in the damp mill then, enter balling disc (the balling disc size is Φ 6000 * 700mm (limit height), rotating speed 8r/min, 46.5 ° at inclination angle) again and make ball, adding the water mode is that the balling disk (-sc) upper and lower adds simultaneously, obtains green-ball.Green-ball is after the sieve apparatus screening, the green-ball of diameter 8～16mm by the uniform cloth of material distributing machine to the shaft furnace drying bed, shaft furnace drying bed temperature is controlled at 500～550 ℃, behind the time of drying 5min, green-ball after the oven dry directly is discharged into hard stove preheating and baking section, preheating temperature is controlled at 900 ℃, maturing temperature is controlled at 1030 ℃, the high-temperature roasting reaction times is controlled at 30～60min, behind the pellet roasting, through the stove internal cooling, be discharged on the belt-cooling machine by the electricity discharge machine that shakes, carry out promptly getting all-sefstromite concentrate pellet ore after the cooling second time.
This all-sefstromite concentrate pellet ore contains TiO
212.05%, TFe 53.81%, ultimate compression strength 2200N/.
Green-ball physicochemical property, full vanadium titanium globe ore deposit baking operation parameter and final product quality see Table 4:
Table 4
Embodiment 3 300m
3Titanium slag in the level blast-furnace smelting
(1) material composition:
30 parts of full vanadium titanium globe ore deposits, 65 parts low vanadium titanium agglomerate and 5 parts of lump ores be the charging system blast furnace of packing in accordance with regulations, and the concrete composition of each raw material sees Table 5.
The blast furnace ferrous material composition list of table 5 position: weight percent, %
| Material name | TFe | FeO | SiO 2 | CaO | TiO 2 |
| Full vanadium titanium globe ore deposit | 52.33 | 0.49 | 4.33 | 1.18 | 12 |
| Low vanadium titanium agglomerate | 49.42 | 7.85 | 6.41 | 15.39 | 2.6 |
| Lump ore | 51 | 5 | 10.5 | 5.5 | 0 |
Fuel is coke and coal dust, coke ash 13.2%, and secondary coke ratio is 62%, goes into oven coke ash content standard deviation 0.4%, coal powder fraction 14.2%.
(2), charging system:
Blast furnace is the clock-type furnace roof, and the ore batch weight is 10.4 tons, and 2.2 tons every batch in coke, 0.64 ton every batch of coal dust, loading sequence are 4OOCC+1CCOO (on behalf of ore, C, O represent fuel), and the formal dress rate is 80%.
(3), operating parameters
Air quantity 65000m
3/ h, 1150 ℃ of wind-warm syndrome, blast energy 52KJ/s, oxygen enrichment percentage 2.8%, pressure reduction 121KPa, 126Kg/t is compared in coal powder injection.
Hot metal composition: [Si] content is 0.20%, and [Si]+[Ti] content is 0.43%, 1425 ℃ of molten iron temperatures, and [Si] content standard deviation 0.04%, [S] content is 0.051%.
The iron degree of flushing and casting and slag: every stove is put 55 minutes slag time, last slag qualification rate 92%, and iron mouth qualification rate 85%, iron amount difference qualification rate 77%, the iron mouth is put the rate of blowing 95%.
The pig iron that makes satisfies further steelmaking quality requirement.
Adopt the mode of flush slag receive grain slag, contain by weight percentage: (TiO
2) 15.9%, (Al
2O
3) 12.11%, (MgO) 9.38%, basicity of slag 1.26.This grain slag can partly add manufacture of cement to, also can be used as the raw material of composite micro-powder
Embodiment 4 300m
3Titanium slag in the level blast-furnace smelting
(1) material composition:
28 parts of full vanadium titanium globe ore deposits, 66 parts low vanadium titanium agglomerate and 6 parts of lump ores mix, and the concrete composition of each raw material sees Table 6.
The blast furnace ferrous material composition list of table 6 position: weight percent, %
| Material name | TFe | FeO | SiO 2 | CaO | TiO 2 |
| Full vanadium titanium globe ore deposit | 52.33 | 0.49 | 4.33 | 1.18 | 12 |
| Low vanadium titanium agglomerate | 49.42 | 7.85 | 6.41 | 15.39 | 2.6 |
| Lump ore | 51 | 5 | 10.5 | 5.5 | 0 |
Fuel is coke and coal dust, coke ash 13.4%, and secondary coke ratio is 60%, goes into oven coke ash content standard deviation 0.5%, coal powder fraction 14.7%.
(2), charging system:
Blast furnace is no bell furnace roof, and the ore batch weight is 14.5 tons, and 4.1 tons every batch in coke, 0.82 ton every batch of coal dust, loading sequence are OOO ↓ CC ↓ (on behalf of ore, C, O represent fuel, and ↓ representative is opened down close), ore inclination angle 32.5 degree, coke inclination angle 31.5 degree.
(3), operating parameters
Air quantity 75000m
3/ h, 1100 ℃ of wind-warm syndrome, blast energy 49KJ/s, oxygen enrichment percentage 2.7%, pressure reduction 115KPa, 120Kg/t is compared in coal powder injection.
Hot metal composition: [Si] content is 0.2%, and [Si]+[Ti] content is 0.42%, and molten iron temperature is controlled at 1440 ℃, [Si] content standard deviation 0.04%, and [S] content is 0.055%.
The iron degree of flushing and casting and slag: every stove is put 50 minutes slag time, last slag qualification rate 92%, and iron mouth qualification rate 86%, iron amount difference qualification rate 78%, it is 95% that the iron mouth is put the rate of blowing.
The pig iron that makes satisfies further steelmaking quality requirement.
Adopt the mode of flush slag receive grain slag, contain by weight percentage: (TiO
2) 15%, (Al
2O
3) 12.67%, (MgO) 9.52%, basicity of slag 1.27.This grain slag can partly add manufacture of cement to, also can be used as the raw material of composite micro-powder.
Claims (3)
1. the method for titanium slag in the blast-furnace smelting, it is characterized in that: with 25～30 parts full vanadium titanium globe ore deposits, 65～70 parts low vanadium titanium agglomerate and 5～10 parts lump ore is that raw material is smelted in blast furnace; Adopt medium-sized stove to smelt its air quantity 65000～75000m in the smelting process
3/ h, 1100～1150 ℃ of wind-warm syndrome, blast energy is 48～52KJ/s; Pulverized coal injection is than 120～140Kg/t, and pressure reduction is 115～125KPa; Molten iron temperature is 1420～1460 ℃; Smelting fuel is coke and coal dust, the coke add-on is counted 450～480Kg by raw material per ton, the coal dust add-on is counted 120～140Kg by raw material per ton, coke ash should be less than 13.5%, secondary coke ratio should be greater than 60%, going into oven coke ash content standard deviation should be less than 0.5%, and coal powder fraction should be less than 15%;
Described full vanadium titanium globe ore deposit contains TFe 52～54%, TiO by weight percentage
211.5～12.5%, FeO 0.4～0.5%, SiO
25～6%, CaO 1.5～2.0%; Its preparation method is an all-sefstromite concentrate with addition of the wilkinite of its weight 1.2～1.5% as raw material blending, dehydration, compound after the dehydration is sent into profit mill in the damp mill, enter balling disc again and make ball, the green-ball cloth that sieves out diameter 8～16mm is to the shaft furnace drying bed, 500～550 ℃ of dry 5min, green-ball after the oven dry is put into 850～950 ℃ of preheatings of shaft furnace preheating and baking section, the high-temperature roasting temperature is controlled at 1030 ℃, reaction times 30～60min, after being put on the belt-cooling machine cooling for the second time behind the stove internal cooling promptly; Described all-sefstromite concentrate chemical ingredients contains TFe 52～57%, FeO 28～33%, SiO by weight percentage
23.5～4%, CaO 1～2%, TiO
211～13%;
Described low vanadium titanium agglomerate contains TFe 47～52% by weight percentage, and CaO 13～16%, TiO
21.0～3.5%, FeO 7～9.5%, SiO
25～7%; Sinter basicity 2.20～2.70; Its preparation method is that sefstromite concentrate powder 20～30%, domestic general breeze 15～25%, common fine ore 15～25%, roll scale 3～5%, import breeze 20～40% and other iron-contained industrial waste are made mixing raw material; 30 square meter sinter machine air quantity are 2400～2500 cubic metres/minute, and 105 square meter sinter machine air quantity are 9000～10000 cubic metres/minute; Adding moisture is 6% of mixing raw material weight; Fixed carbon is controlled at 2.8% in the mixing raw material; The main chemical compositions of raw material is: sefstromite concentrate powder TFe 52～57%, FeO 28～33%, SiO
23.5～4%, CaO1～2%, TiO
211～13%, domestic general breeze TFe 45～55%, FeO 0～10%, SiO
23.5～16.5%, CaO 0.5～8.5%, common fine ore TFe 58～68%, FeO 20～28%, SiO
23.5～7%, CaO 1.1～2.3%, TiO
20～1%, roll scale TFe 60～70%, FeO 20～35%, import breeze TFe 60～62%, FeO 0～10%, SiO
23～4.5%;
Described lump ore contains TFe50～60% by weight percentage, and FeO 0～10%, SiO
23.5～15.5%, CaO 0～8%.
2. the method for titanium slag in the blast-furnace smelting according to claim 1 is characterized in that: add oxygen in the blast furnace blast air, oxygen enrichment percentage is 2～3%.
3. the method for titanium slag in the blast-furnace smelting according to claim 1 and 2 is characterized in that: treatment of slag is the flush slag mode.
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| CN101476001B true CN101476001B (en) | 2011-05-11 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102978312B (en) * | 2012-12-13 | 2015-04-01 | 四川省川威集团有限公司 | Blast furnace smelting process used for high-vanadium-titanium low-MgO furnace slag |
| CN103484662A (en) * | 2013-10-22 | 2014-01-01 | 成都天禄源商贸有限公司 | High-titanium slag smelting technique |
| CN103695582B (en) * | 2013-12-25 | 2015-09-09 | 四川德胜集团钒钛有限公司 | Dehumidification v-bearing titanomagnetite smelting state modulator technology |
| CN104152614B (en) * | 2014-08-26 | 2016-06-01 | 攀钢集团西昌钢钒有限公司 | The distributing process of blast furnace burden |
| CN104762429A (en) * | 2015-04-16 | 2015-07-08 | 攀钢集团攀枝花钢铁研究院有限公司 | Blast furnace smelting method |
| CN104894313B (en) * | 2015-06-09 | 2017-12-15 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of method of vanadium titano-magnetite blast furnace process |
| CN106244750B (en) * | 2016-08-08 | 2018-09-07 | 四川德胜集团钒钛有限公司 | The method of blast furnace process schreyerite under high-coal ratio |
| CN109082489A (en) * | 2018-10-30 | 2018-12-25 | 攀钢集团西昌钢钒有限公司 | A method of smelting schreyerite |
| CN114058751B (en) * | 2020-06-12 | 2022-11-01 | 武钢集团昆明钢铁股份有限公司 | Intensified smelting method for titanium slag in blast furnace |
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