CN1789432A - Process for smelting schreyerite by blast furnace with cooling block - Google Patents
Process for smelting schreyerite by blast furnace with cooling block Download PDFInfo
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- CN1789432A CN1789432A CN 200510132605 CN200510132605A CN1789432A CN 1789432 A CN1789432 A CN 1789432A CN 200510132605 CN200510132605 CN 200510132605 CN 200510132605 A CN200510132605 A CN 200510132605A CN 1789432 A CN1789432 A CN 1789432A
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Abstract
The invention relates the technology of smelting schreyerite by high furnace, specially high pH value schreyerite sintered ore and acid schreyerite pellet ore. The method comprises the following steps: mixing the sintered ore containing vanadium and pellet ore containing vanadium, smelting them by modular high furnace to get iron melt containing vanadium, and carrying out steel production. The key points of the method are following: 1 improving standard speed; 2 reducing the foundry iron containing vanadium; 3 lowering the basic capacity of clinker. The invention makes the special type ore smelting technology requirement common. The main econo-technical indicators are good. The availability ratio is 2.23-2.84t/m3d, wind temperature is 705-988Deg.C and comprehensive coke ratio is 582-634kg/t.
Description
Affiliated technical field:
The present invention relates to a kind of technology of blast-furnace smelting schreyerite, particularly high basicity vanadium titanium agglomerate with addition of acid vanadium titanium globe ore deposit, the Technology that adopts the module blast furnace to smelt.
Background technology:
At present, people smelt the blast-furnace smelting of the general employing standard type of furnace to schreyerite, adopt known common standard blast furnace technology operation.The module blast furnace is to replace blast furnace cooling stave with large-scale refrigerating module, to reach blast furnace cooling purpose.Module blast furnace relative standard type of furnace blast furnace has less investment, builds fast advantage, but having relatively high expectations to raw material; Because the furnace wall attenuation, cooling intensity is big, requires the edge to develop relatively, guarantees the stable, even of edge coal gas stream; The air blast wind speed requires with till reaching the center of blowing through; Furnace temperature requires upper range relatively; Basicity control is on the low side.How carrying out schreyerite with the module blast furnace and smelt, remedy the deficiency of module blast furnace itself, is that those skilled in the art wish the technical barrier that solves for a long time.
Summary of the invention:
The object of the invention provides a kind of process for smelting schreyerite by blast furnace with cooling block, realizes can improving the quality of products with module blast-furnace smelting schreyerite, reduces blast furnace coke ratio, remedies the deficiency of module blast furnace self, solves the problems referred to above that background technology exists.
Technical scheme of the present invention is: will contain the vanadium agglomerate and contain the vanadium pellet and mix, and smelt vanadium-bearing hot metal by the module blast furnace, and send into steel making working procedure.
Technical process is:
The main points that the module blast-furnace smelting goes out vanadium-bearing hot metal technology are: 1. improve standard wind speed; 2. reduce the pig iron and contain vanadium; 3. reduce the slag dual alkalinity.
The control criterion wind speed is greater than smelting more than the common molten iron 10m/s, and preferable scope is at 100-139m/s; The pig iron contains vanadium greater than 0.30%, and preferable scope is at 0.37-0.55% (weight percent); Dual alkalinity 1.08--1.15, preferred values are 1.1.
The control coke size is at 25--60mm, and rotary drum is greater than 91%, and the agglomerate rotary drum is greater than 75% (6.3mm), and the pellet rotary drum is greater than 90%.The sintering ignition temperature is 1150--1250 ℃, and the igniting negative pressure is 5.0--9.0kpa, and the shaft furnace gas pressure is greater than 10kpa.
Adopt the present invention, in technological adjustment, take into account schreyerite smelting, smooth operation of furnace condition, and the two is organically combined, extraordinary mining and metallurgy sweetening process is required generalization, make every effort on common mining and metallurgy sweetening process requirement basis, change a little, satisfy the requirement of extraordinary mining and metallurgy sweetening process, remedy the deficiency of module blast furnace self.Binding modules blast-furnace smelting characteristic the blast furnace smelting process technology modulesization of high basicity vanadium titanium agglomerate with addition of acid vanadium titanium globe ore deposit, shows by experiment, and main economic and technical norms obtain better effects, and utilization coefficient reaches 2.23-2.84t/m
3D, wind-warm syndrome 705--988 ℃, comprehensive coke ratio drops to 582--634kg/t.
Embodiment:
By the following examples, the invention will be further described.
Technical process is:
The main points that the module blast-furnace smelting goes out the vanadium-bearing hot metal operation are: 1. improve standard wind speed; 2. reduce the pig iron and contain vanadium; 3. reduce the slag dual alkalinity.
1. control criterion wind speed: module blast furnace opposite edges comparatively develop, smelt schreyerite with smelting common ore deposit relatively, stock column strengthens the penetrativity resistance of air blast, one's will dies within one stock column in being easy to generate, the air port area dwindles, and increases standard wind speed, improves blast energy, improve the air blast penetrativity, coal gas stream is distributed for three times be tending towards stdn.
Each parameter sees the following form:
| Project | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| Tuyere diameter mm | 10*100 | 10*95 | 10*90 |
| Air port area m 2 | 0.0785 | 0.071 | 0.064 |
| Standard wind speed m/s | 100 | 110 | 123 |
2. reduce the pig iron and contain vanadium: contain relatively large titanium in the schreyerite, influence very big for slag viscosity, permeability of stock column.In the sintered material structure with addition of the general smart powder of certain proportion, with addition of scope be: 0-30%.Progressively control aluminiferous amount in the feed stock for blast furnace, the titanium amount in the blast furnace is brought in control into, reduces titanium for slag viscosity, permeability of stock column influence, makes vanadium-bearing hot metal more near common molten iron, improves blast-furnace slag viscosity, permeability of stock column.Each parameter sees the following form:
| Project | Embodiment 1 | Embodiment 2 | Embodiment 3 | |
| General powder proportioning % | 0 | 15 | 30 | |
| The sintering composition | R 2 | 1.98 | 2.03 | 2.15 |
| V％ | 0.77 | 0.48 | 0.43 | |
| Ti％ | 5.75 | 4.65 | 3.67 | |
| Grade % | 53.5 | 53.63 | 53.5 | |
| The molten iron composition | Si％ | 0.3 | 0.23 | 0.23 |
| V％ | 0.55 | 0.43 | 0.37 | |
| Ti％ | 0.3 | 0.26 | 0.21 | |
| R 2 | 1.1 | 1.1 | 1.1 | |
3. reduce the slag dual alkalinity: it is poor for the more common ore deposit of coal gas utilization that schreyerite is smelted, and the molten iron sulfur-bearing is higher relatively, and dual alkalinity is controlled more than 1.15.At module blast furnace design characteristics, it is siliceous to propose to improve the pig iron relatively, reduces the slag dual alkalinity, helps furnace condition anterograde, reduces pig iron sulfur-bearing.(data were the extraction phase with 10 days respectively in the table) each parameter sees the following form:
| Project | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| The siliceous % of the pig iron | 0.3 | 0.23 | 0.18 |
| Ti％ | 0.30 | 0.26 | 0.20 |
| R 2 | 1.10 | 1.10 | 1.10 |
| Sit the material number of times | 15 | 5 | 13 |
| Pig iron sulfur-bearing % | 0.065 | 0.055 | 0.069 |
| Pig iron sulfur-bearing≤0.060% ratio | 50 | 63 | 43 |
The main economic and technical norms of blast furnace:
Binding modules blast-furnace smelting characteristic, the blast furnace smelting process technology modulesization of high basicity vanadium titanium agglomerate with addition of acid vanadium titanium globe ore deposit, main economic and technical norms obtain better effects.
| Project | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
| Air port area m 2 | 0.0785 | 0.071 | 0.064 | 0.0567 |
| Standard wind speed m/s | 100 | 110 | 123 | 139 |
| Si％ | 0.3 | 0.23 | 0.23 | 0.18 |
| V％ | 0.55 | 0.43 | 0.37 | 0.37 |
| Ti％ | 0.3 | 0.26 | 0.21 | 0.21 |
| R 2 | 1.1 | 1.1 | 1.1 | 1.10 |
| Utilization coefficient t/m 3d | 2.23 | 2.84 | 2.80 | 2.76 |
| Wind-warm syndrome ℃ | 705 | 947 | 987 | 988 |
| Comprehensive coke ratio kg/t | 634 | 600 | 584 | 582 |
Claims (8)
1, a kind of process for smelting schreyerite by blast furnace with cooling block is characterized in that mixing containing the vanadium agglomerate and containing the vanadium pellet, smelts vanadium-bearing hot metal by the module blast furnace, and the main points that the module blast-furnace smelting goes out vanadium-bearing hot metal technology are: 1. improve standard wind speed; 2. reduce the pig iron and contain vanadium; 3. reduce the slag dual alkalinity.
2, the process for smelting schreyerite by blast furnace with cooling block according to claim 1 is characterized in that the control criterion wind speed greater than smelting more than the common molten iron 10m/s, and the pig iron contains the vanadium weight percent greater than 0.30%, dual alkalinity 1.08--1.15.
3, the process for smelting schreyerite by blast furnace with cooling block according to claim 2 is characterized in that the preferable scope of control criterion wind speed is at 100-139m/s; The pig iron contains the preferable scope of vanadium weight percent at 0.37-0.55%; The dual alkalinity preferred values is 1.1.
4, according to claim 1 or 2 described process for smelting schreyerite by blast furnace with cooling block, it is characterized in that controlling coke size at 25--60mm, rotary drum is greater than 91%, and the agglomerate rotary drum is greater than 75% (6.3mm), and the pellet rotary drum is greater than 90%.
5, according to claim 1 or 2 described process for smelting schreyerite by blast furnace with cooling block, it is characterized in that the sintering ignition temperature is 1150--1250 ℃, the igniting negative pressure is 5.0--9.0kpa, the shaft furnace gas pressure is greater than 10kpa.
6, according to claim 1 or 2 described process for smelting schreyerite by blast furnace with cooling block, it is characterized in that the air port area dwindles, increase standard wind speed, improve blast energy, improve the air blast penetrativity, coal gas stream is distributed for three times be tending towards stdn.
7, according to claim 1 or 2 described process for smelting schreyerite by blast furnace with cooling block, it is characterized in that in the sintered material structure with addition of the general smart powder of certain proportion, progressively control aluminiferous amount in the feed stock for blast furnace, the titanium amount in the blast furnace is brought in control into, reduce titanium for slag viscosity, permeability of stock column influence, make vanadium-bearing hot metal more near common molten iron, improve blast-furnace slag viscosity, permeability of stock column.
8, according to claim 1 or 2 described process for smelting schreyerite by blast furnace with cooling block, it is siliceous to it is characterized in that improving the pig iron relatively, reduces the slag dual alkalinity, helps furnace condition anterograde, reduces pig iron sulfur-bearing.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102206718A (en) * | 2010-03-29 | 2011-10-05 | 攀钢集团钢铁钒钛股份有限公司 | Furnace charge for vanadium-titanium magnetite blast furnace smelting, and blast furnace smelting method |
| CN109082491A (en) * | 2018-10-09 | 2018-12-25 | 鞍钢股份有限公司 | Comprehensive maintenance method for hearth and bottom of blast furnace |
| CN115198115A (en) * | 2022-06-24 | 2022-10-18 | 岳庆丰 | Method for preparing rock wool and vanadium-containing pig iron by smelting stone coal vanadium ore in blast furnace |
-
2005
- 2005-12-27 CN CN 200510132605 patent/CN1789432A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102206718A (en) * | 2010-03-29 | 2011-10-05 | 攀钢集团钢铁钒钛股份有限公司 | Furnace charge for vanadium-titanium magnetite blast furnace smelting, and blast furnace smelting method |
| CN102206718B (en) * | 2010-03-29 | 2013-04-10 | 攀钢集团钢铁钒钛股份有限公司 | Furnace charge for vanadium-titanium magnetite blast furnace smelting, and blast furnace smelting method |
| CN109082491A (en) * | 2018-10-09 | 2018-12-25 | 鞍钢股份有限公司 | Comprehensive maintenance method for hearth and bottom of blast furnace |
| CN115198115A (en) * | 2022-06-24 | 2022-10-18 | 岳庆丰 | Method for preparing rock wool and vanadium-containing pig iron by smelting stone coal vanadium ore in blast furnace |
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