CN102162019B - Multistage combined pretreatment method for vanadium-bearing molten iron - Google Patents
Multistage combined pretreatment method for vanadium-bearing molten iron Download PDFInfo
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- CN102162019B CN102162019B CN 201110085308 CN201110085308A CN102162019B CN 102162019 B CN102162019 B CN 102162019B CN 201110085308 CN201110085308 CN 201110085308 CN 201110085308 A CN201110085308 A CN 201110085308A CN 102162019 B CN102162019 B CN 102162019B
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- vanadium
- hot metal
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- half steel
- molten iron
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 92
- 229910052720 vanadium Inorganic materials 0.000 title claims abstract description 77
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 46
- 238000002203 pretreatment Methods 0.000 title abstract description 9
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical group [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 title abstract 11
- 238000000034 method Methods 0.000 claims abstract description 40
- 238000000605 extraction Methods 0.000 claims abstract description 33
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 29
- 230000023556 desulfurization Effects 0.000 claims abstract description 29
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 18
- 239000010936 titanium Substances 0.000 claims abstract description 18
- 238000009628 steelmaking Methods 0.000 claims abstract description 10
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 9
- 239000011777 magnesium Substances 0.000 claims abstract description 9
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical group [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 claims description 67
- 229910000831 Steel Inorganic materials 0.000 claims description 65
- 239000010959 steel Substances 0.000 claims description 65
- 229910052751 metal Inorganic materials 0.000 claims description 56
- 239000002184 metal Substances 0.000 claims description 56
- 238000007664 blowing Methods 0.000 claims description 31
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
- 239000003795 chemical substances by application Substances 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 239000004567 concrete Substances 0.000 claims description 4
- 241001062472 Stokellia anisodon Species 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 2
- 238000005266 casting Methods 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 claims description 2
- 229910000805 Pig iron Inorganic materials 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 abstract 2
- 238000010079 rubber tapping Methods 0.000 abstract 2
- 238000005516 engineering process Methods 0.000 description 13
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 12
- 238000002844 melting Methods 0.000 description 7
- 230000008018 melting Effects 0.000 description 7
- 239000002893 slag Substances 0.000 description 7
- 235000012255 calcium oxide Nutrition 0.000 description 6
- 239000000292 calcium oxide Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000010703 silicon Substances 0.000 description 6
- 229910052710 silicon Inorganic materials 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 4
- 235000011941 Tilia x europaea Nutrition 0.000 description 4
- 229910052791 calcium Inorganic materials 0.000 description 4
- 239000011575 calcium Substances 0.000 description 4
- 230000003009 desulfurizing effect Effects 0.000 description 4
- 239000004571 lime Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- 238000004886 process control Methods 0.000 description 3
- 239000000571 coke Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- XHCLAFWTIXFWPH-UHFFFAOYSA-N [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] XHCLAFWTIXFWPH-UHFFFAOYSA-N 0.000 description 1
- KRBQUZKKZGAKOJ-UHFFFAOYSA-N [Ti].[P].[S] Chemical compound [Ti].[P].[S] KRBQUZKKZGAKOJ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 235000003599 food sweetener Nutrition 0.000 description 1
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 description 1
- PNXOJQQRXBVKEX-UHFFFAOYSA-N iron vanadium Chemical compound [V].[Fe] PNXOJQQRXBVKEX-UHFFFAOYSA-N 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000003765 sweetening agent Substances 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 150000003681 vanadium Chemical class 0.000 description 1
- 229910001935 vanadium oxide Inorganic materials 0.000 description 1
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention relates to a multistage combined pretreatment method for vanadium-bearing molten iron, in particular to a molten iron pretreatment process for realizing desulfurization, dephosphorization and vanadium extraction on the vanadium-bearing molten iron, belonging to the technical field of refinement of pig iron. According to the technical scheme, converter vanadium extraction is performed on the vanadium-bearing molten iron to obtain semisteel, and then converter steelmaking is performed on the semisteel. The technical scheme is characterized in that vanadium-bearing molten iron obtained by iron tapping of more than one blast furnace is collected, and the molten iron is pretreated in a three-stage combined mode, wherein at the first stage, granulated magnesium is singly blown in a ladle for desulfurization; at the second stage, vanadium extraction, desilicification and titanium removal are performed by a converter; and at the third stage, dephosphorization is performed in the semisteel tapping process of the vanadium extraction converter. The multistage combined pretreatment method for vanadium-bearing molten iron combines a common molten iron pretreatment process with a special converter vanadium extraction process, thus effectively reducing the costly desulfurization burden of a blast furnace, realizing low coke-ratio operation, and further improving and optimizing the furnace charge structure; and in addition, the multistage combined pretreatment method is favorable for high-speed converting of a steelmaking furnace, and also can provide favorable conditions for intelligent control of the steelmaking furnace by a computer.
Description
Technical field
The present invention relates to the multi-section combined pretreated method of a kind of vanadium-bearing hot metal, particularly vanadium-bearing hot metal is realized the hot metal pretreatment technology of desulfurization, dephosphorization and vanadium extraction, belong to pig iron refining techniques field.
Background technology
Hot metal pretreatment is meant that molten iron is blended into the various processing of carrying out before the steel melting furnace, is divided into two big types of common hot metal pretreatment and particular iron water pretreatments.Common hot metal pretreatment comprises desulfurizing iron, desiliconization of hot metal and dephosphorization of molten iron; The particular iron water pretreatment generally is to the special elements that contains in the molten iron purify refining or comprehensive utilization of resources, like vanadium extraction from hot metal, carry niobium, take off pretreatment technology such as chromium.The hot metal pretreatment technology grows up from the 60 to 70's of eighties of last century and has been widely used in various countries till now; Be used to improve molten steel quality; Its technology is also developed rapidly; At present, the hot metal pretreatment technology method mainly contains: mechanical mixing method, the paddling process of blowing, comprise top-blown powder method and subaeration, feed a silk method and also begin in recent years to be applied.From the selection of handling flux mainly is that lime, carbide of calcium are, magnesium is three types of sweetening agents, can use separately, can Application of composite.With the vanadium iron ore deposit is the iron and steel enterprise of raw material, makes steel to contain trace elements such as vanadium, titanium in the employed molten iron, is called for short vanadium-bearing hot metal; For extracting the v element in the vanadium-bearing hot metal; Adopt converter duplex technology, promptly vanadium-bearing hot metal is smelt half steel through behind the vanadium extraction by converter blowing earlier, carries out converter steelmaking with half steel again.Also there is the oxidation to molten iron silicon and titanium in the vanadium extraction by converter blowing process in vanadium oxide, silicon and titanium content are all less than 0.05% in the half steel of gained after the vanadium extraction, and therefore, the desiliconization that can utilize this link to accomplish in dephosphorization, desiliconization and desophorization for hot metal is handled.Vanadium extraction by converter blowing gained vanadium containing slag (abbreviation vanadium slag) has strict requirement to quicklime, so the vanadium extraction by converter blowing process is difficult to realize the dephosphorization function in the dephosphorization, desiliconization and desophorization for hot metal.In addition, for guaranteeing suboxide calcium contents in this vanadium slag, desulfurizing iron should not selected lime, carbide of calcium fimily desulfurizing agent.Above-mentioned reason shows; Vanadium-bearing hot metal realizes that the hot metal pretreatment technology and the common hot metal pretreatment technology of desulfurization, dephosphorization and vanadium extraction have very big difference; Also having no talent combines common hot metal pretreatment technology and vanadium extraction by converter blowing special process, uses common vanadium-bearing hot metal and treatment process to have problems such as the blast furnace load is heavy, burden structure is unreasonable, consumption is big separately.
Summary of the invention
The object of the invention provides the multi-section combined pretreated method of a kind of vanadium-bearing hot metal, and common hot metal pretreatment technology and vanadium extraction by converter blowing special process are combined, and realizes hot metal pretreatment not influencing under the vanadium extraction by converter blowing effect; Effectively alleviate the desulfurization load of the high cost of blast furnace, realize low coke ratio operation, optimize burden structure; Simultaneously; Help the high speed blowing of steel melting furnace, also the computer intelligence control for steel melting furnace provides very advantageous conditions, solves the problems referred to above that exist in the background technology.
Technical scheme of the present invention is:
The multi-section combined pretreated method of a kind of vanadium-bearing hot metal; Vanadium-bearing hot metal is smelt half steel through behind the vanadium extraction by converter blowing earlier, carries out converter steelmaking with half steel again, and its special feature is: collect the vanadium-bearing hot metal from an above blast furnace casting; Adopt three sections array modes to carry out hot metal pretreatment; First section is adopted hot metal ladle singly to blow granular magnesium desulfurization, and second section is adopted converter to carry out vanadium extraction and desiliconization, take off titanium, and the 3rd section is adopted converter extracting vanadium to go out half steel process dephosphorization.
The present invention's technical process more specifically is: blast-melted → hot metal ladle is singly blown granular magnesium desulfurization → converter extracting vanadium vanadium extraction, desiliconization simultaneously, titanium elements → go out half steel process dephosphorization → skim → make steel.
Said first section employing hot metal ladle singly blown particle magnesium and carried out the desulfurization processing; Because vanadium extraction by converter blowing gained vanadium slag has strict requirement to quicklime; For guaranteeing that quicklime meets the requirements in the vanadium slag; Can not adopt lime and carbide of calcium fimily desulfurizing agent, therefore adopt hot metal ladle singly to blow particle magnesium mode and carry out the desulfurization processing.
Said second section is adopted the converter oxygen supply to carry out vanadium extraction and desiliconization, titanium elements; Silicon in the molten iron, the existence of titanium elements are unfavorable for dephosphorization; Therefore before dephosphorization; At first should silicon, titanium be taken off to than low value, vanadium extraction by converter blowing takes off desiliconization in the molten iron, titanium elements to below 0.05%, for dephosphorization has been created condition.
Said the 3rd section is adopted converter extracting vanadium to go out half steel process dephosphorization, in going out the half steel process, evenly adds iron scale and dephosphorizing agent through alloy chute, and stirring of half steel stream and use ladle bottom blowing stir the raising dephosphorization effect when utilizing out half steel.
Iron scale that dephosphorizing process uses is steel-making and steel rolling self-circulation iron sheet, and add-on is the 3-5kg/t half steel; Employed dephosphorizing agent add-on is the 4-6kg/t half steel, and the concrete composition quality percentage ratio of dephosphorizing agent is: CaO 45-50, SiO
217-25, MgO 6-10, Al
2O
34-7, Na
2CO
39-13, P≤0.08, S≤0.018.
Beneficial effect of the present invention: the present invention presses first desulfurization with the pre-treatment of vanadium-bearing hot metal, the desiliconization simultaneously of vanadium extraction process, titanium, and the mode that goes out half steel process dephosphorization makes up to be implemented step by step; Common hot metal pretreatment technology and vanadium extraction by converter blowing special process are combined; Realize hot metal pretreatment not influencing under the vanadium extraction by converter blowing effect, effectively alleviate the desulfurization load of the high cost of blast furnace, realize low coke ratio operation; And can further improve, optimize burden structure, thorough liberation blast furnace; Three take off the processing molten iron makes steel melting furnace that decarburization, intensification task are only arranged simultaneously, thereby has reduced the lime consumption of converter steelmaking; In addition; The present invention helps the high speed blowing of steel melting furnace, and also the computer intelligence control for steel melting furnace provides very advantageous conditions, can realize the accurate control of blow end point with stove directly tap; The shortening in blowing cycle makes lining erosion alleviate steel melting furnace furnace life significantly and also will significantly improve.
Technological effect of the present invention sees the following form:
Silicon, titanium phosphorus sulphur change before and after the hot metal pretreatment
Embodiment
Below through embodiment the present invention is described further.
In an embodiment, concrete grammar of the present invention comprises the steps:
The foundry ladle overhead traveling crane that (1) molten iron will be housed hangs the desulfurization station; Adopt hot metal ladle singly to blow particle magnesium mode and carry out the desulfurization processing; Because vanadium extraction by converter blowing gained vanadium slag has strict requirement to quicklime,, the residue after the desulfurization is taken off totally for guaranteeing that quicklime meets the requirements in the vanadium slag;
(2) molten iron after the desulfurization is blended into converter extracting vanadium, carries out the vanadium extraction operation, because silicon, titanium elements and oxygen binding ability in the molten iron are higher than vanadium, the silicon in the vanadium extraction process in the molten iron, titanium are preferentially oxidized, the purpose of reach dark degree desiliconization, taking off titanium;
(3) in going out the half steel process, evenly add iron scale and dephosphorizing agent through alloy chute, the iron scale add-on is 3～5kg/t half steel, and the dephosphorizing agent add-on is the 4-6kg/t half steel;
Stirring of half steel stream and use ladle bottom blowing nitrogen stir the raising dephosphorization effect when (4) utilizing out half steel, for guaranteeing mixing effect, obtain the half steel time greater than 4-6 minute, and ladle bottom blowing nitrogen WP reaches 0.1Mpa-0.3Mpa;
(5) processing of before going into steel-making converter, skimming.
Several concrete embodiment below are provided:
Embodiment 1:
Pack into 162 tons of iron water amounts of hot metal ladle, hot metal composition sees the following form:
At first hang the desulfurization station and carry out the desulfurization processing, desulfurization result and processing parameter see the following form:
Molten iron after the desulfurization is blended into converter extracting vanadium, adds 15 tons of iron blocks, carries out the oxygen supply blowing, process control and terminal point situation following table:
Go out half steel operation (the half steel tap is 169 tons) then, going out the half steel time is 4 minutes, and ladle bottom blowing nitrogen WP reaches 0.2Mpa.The iron scale add-on is the 3kg/t half steel, and the dephosphorizing agent add-on is the 4kg/t half steel.Go out half steel and hung the position processing of skimming of skimming, carried out the sample examination composition then.
See the following form through multi-section combined pre-treatment result:
Embodiment 2:
Pack into 161 tons of iron water amounts of hot metal ladle, hot metal composition sees the following form:
At first hang the desulfurization station and carry out the desulfurization processing, desulfurization result and processing parameter see the following form:
Molten iron after the desulfurization is blended into converter extracting vanadium, adds 14 tons of iron blocks, carries out the oxygen supply blowing, process control and terminal point situation following table:
Go out half steel operation (the half steel tap is 167 tons) then, going out the half steel time is 5 minutes, and ladle bottom blowing nitrogen WP reaches 0.2Mpa.The iron scale add-on is the 4kg/t half steel, and the dephosphorizing agent add-on is the 5kg/t half steel.Go out half steel and hung the position processing of skimming of skimming, carried out the sample examination composition then
See the following form through multi-section combined pre-treatment result:
Embodiment 3:
Pack into 162 tons of iron water amounts of hot metal ladle, hot metal composition sees the following form:
At first hang the desulfurization station and carry out the desulfurization processing, desulfurization result and processing parameter see the following form:
Be blended into converter extracting vanadium then, add 18 tons of iron blocks, carry out the oxygen supply blowing, process control and terminal point situation following table:
Go out half steel operation (the half steel tap is 169 tons) then, going out the half steel time is 6 minutes, and ladle bottom blowing nitrogen WP reaches 0.3MPa.The iron scale add-on is the 5kg/t half steel, and the dephosphorizing agent add-on is the 6kg/t half steel.Go out half steel and hung the position processing of skimming of skimming, carried out the sample examination composition then
See the following form through multi-section combined vanadium-bearing hot metal pre-treatment result:
Claims (7)
1. multi-section combined pretreated method of vanadium-bearing hot metal; Vanadium-bearing hot metal is smelt half steel through behind the vanadium extraction by converter blowing earlier, carries out converter steelmaking with half steel again, it is characterized in that collecting the vanadium-bearing hot metal from an above blast furnace casting; Adopt three sections array modes to carry out hot metal pretreatment; First section is adopted hot metal ladle singly to blow granular magnesium desulfurization, and second section is adopted converter to carry out vanadium extraction and desiliconization, take off titanium, and the 3rd section is adopted converter extracting vanadium to go out half steel process dephosphorization.
2. according to the multi-section combined pretreated method of the said vanadium-bearing hot metal of claim 1; It is characterized in that its technical process is: blast-melted → hot metal ladle is singly blown granular magnesium desulfurization → converter extracting vanadium vanadium extraction, desiliconization simultaneously, titanium elements → go out half steel process dephosphorization → skim → make steel.
3. according to claim 1 or 2 said multi-section combined pretreated methods of vanadium-bearing hot metal, it is characterized in that said second section is adopted the converter oxygen supply to carry out vanadium extraction and desiliconization, titanium elements, vanadium extraction by converter blowing takes off desiliconization in the molten iron, titanium elements to below 0.05%.
4. according to claim 1 or 2 said multi-section combined pretreated methods of vanadium-bearing hot metal; It is characterized in that said the 3rd section is adopted converter extracting vanadium to go out half steel process dephosphorization; In going out the half steel process, evenly add iron scale and dephosphorizing agent through alloy chute, stirring of half steel stream and use ladle bottom blowing stir when utilizing out half steel.
5. according to the multi-section combined pretreated method of the said vanadium-bearing hot metal of claim 4, it is characterized in that iron scale that dephosphorizing process uses is steel-making and steel rolling self-circulation iron sheet, add-on is the 3-5kg/t half steel; Employed dephosphorizing agent add-on is the 4-6kg/t half steel.
6. according to the multi-section combined pretreated method of the said vanadium-bearing hot metal of claim 5, it is characterized in that the concrete composition quality percentage ratio of said dephosphorizing agent is: CaO 45-50, SiO
217-25, MgO 6-10, Al
2O
34-7, Na
2CO
39-13, P≤0.08, S≤0.018.
7. according to claim 4 or 5 said multi-section combined pretreated methods of vanadium-bearing hot metal; Stirring of half steel stream and use ladle bottom blowing nitrogen stir when it is characterized in that utilizing out half steel; Go out the half steel time greater than 4-6 minute, ladle bottom blowing nitrogen WP reaches 0.1Mpa-0.3Mpa.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110085308 CN102162019B (en) | 2011-04-06 | 2011-04-06 | Multistage combined pretreatment method for vanadium-bearing molten iron |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110085308 CN102162019B (en) | 2011-04-06 | 2011-04-06 | Multistage combined pretreatment method for vanadium-bearing molten iron |
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| CN102162019A CN102162019A (en) | 2011-08-24 |
| CN102162019B true CN102162019B (en) | 2012-11-21 |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103205536B (en) * | 2013-04-26 | 2015-09-02 | 攀钢集团攀枝花钢铁研究院有限公司 | semi-steel dephosphorizing agent and semi-steel dephosphorizing method |
| CN103540711B (en) * | 2013-10-23 | 2015-04-29 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for simultaneously removing sulfur and phosphorus from semi-steel |
| CN104046717B (en) * | 2013-12-03 | 2016-02-24 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of vanadium-titanium-iron-water converter steel making method |
| CN103966382B (en) * | 2014-04-24 | 2015-08-26 | 攀钢集团攀枝花钢铁研究院有限公司 | The treatment process of vanadium-bearing hot metal and the smelting process of v-ti magnetite concentrate |
| CN103952517B (en) * | 2014-04-24 | 2015-09-16 | 攀钢集团攀枝花钢铁研究院有限公司 | Containing the treatment process of vanadium chromium hot melt and the smelting process of high-chromic vanadium titanium magnet ore concentrate |
| CN103993118B (en) * | 2014-05-29 | 2016-01-13 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of smelting process containing sefstromite |
| CN104164528A (en) * | 2014-07-26 | 2014-11-26 | 钢铁研究总院 | Hot metal titanium-removal method in combined blown converter |
| CN104774994B (en) * | 2015-03-31 | 2017-09-15 | 河北钢铁股份有限公司承德分公司 | A kind of method that vanadium-bearing hot metal extracts the synchronous dephosphorization of vanadic anhydride |
| CN105112600A (en) * | 2015-08-31 | 2015-12-02 | 北京首钢国际工程技术有限公司 | Molten iron concentrated vanadium extraction system and using method thereof |
| CN107460269A (en) * | 2017-07-20 | 2017-12-12 | 新疆八钢铁股份有限公司 | A kind of technique of high-silicon molten iron duplex desiliconization |
| CN108728609A (en) * | 2018-07-23 | 2018-11-02 | 石家庄钢铁有限责任公司 | A kind of de- titanium device and method of ladle bottom blowing stirring |
| CN111041156A (en) * | 2019-12-26 | 2020-04-21 | 河钢股份有限公司承德分公司 | Single-station molten iron treatment process |
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| CN1273620C (en) * | 2003-08-27 | 2006-09-06 | 宝山钢铁股份有限公司 | Molten iron pretreatment method |
| DE102006056671A1 (en) * | 2006-11-30 | 2008-06-05 | Sms Demag Ag | Method and apparatus for stainless steel production without electrical energy supply on the basis of pig iron pretreated in a DDD plant |
| CN101302578B (en) * | 2008-06-27 | 2010-06-16 | 攀钢集团攀枝花钢铁研究院有限公司 | Composite vanadium extraction and dephosphorization agent for vanadium-containing molten iron and preparation thereof |
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