CN103194567A - Smelting process of iron ore containing vanadium - Google Patents
Smelting process of iron ore containing vanadium Download PDFInfo
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- CN103194567A CN103194567A CN2013101505085A CN201310150508A CN103194567A CN 103194567 A CN103194567 A CN 103194567A CN 2013101505085 A CN2013101505085 A CN 2013101505085A CN 201310150508 A CN201310150508 A CN 201310150508A CN 103194567 A CN103194567 A CN 103194567A
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Abstract
The invention provides a smelting process of iron ore containing vanadium. The smelting process sequentially comprises the following steps of smelting the iron ore containing vanadium by a blast furnace to obtain molten iron containing vanadium; carrying out inverter vanadium extraction on the molten iron containing vanadium to respectively obtain semisteel and vanadium slag; and carrying out KR desulfuration or blowing desulfuration on the semisteel, wherein the semisteel temperature is controlled at 1350-1400 DEG C. By adopting the smelting process, the problem of low sulphur removal efficiency of the molten iron containing vanadium can be solved under the condition of improving the vanadium yield; and the iron loss can be reduced.
Description
Technical field
The invention belongs to and contain vanadium iron mining and metallurgy refining technical field, specifically, relate to a kind of smelting process that contains the vanadium iron ore deposit.
Background technology
Usually, contain the vanadium iron ore deposit after smelting the composition vanadium-bearing hot metal, need carry out vanadium extraction earlier, just can make steel then.For example, vanadium titano-magnetite has huge reserves as a kind of important vanadium iron ore deposit that contains in China.Climb steel, hold steel, enterprises such as elder brother's steel, prestige steel adopt vanadium titano-magnetite to smelt, the molten iron that the vanadium titano-magnetite blast-furnace smelting goes out is compared the content of vanadium height with common molten iron, and vanadium is a kind of important resource, so must vanadium extraction before the molten iron-steelmaking, produces vanadium slag.At present, the production method of producing vanadium slag both at home and abroad is more, mainly contains New Zealand's hot metal ladle and blows vanadium technology, South Africa shaking ladle process for extracting vanadium, Russia and Chinese vanadium extraction by converter blowing technology etc., and other process for extracting vanadium also comprises v-bearing steel slag vanadium extraction, process for extracting vanadium from stone coal etc.Wherein with vanadium extraction by converter blowing technology optimum, technico-economical comparison is best.
Yet the sulphur content in the steel directly affects its use properties, and the too high meeting of sulphur content causes the hot workability of steel to degenerate in the steel, causes " hot-short " of steel; In addition, also can obviously reduce the welding property of steel, cause hot cracking; The plasticity of steel is also along with the remarkable variation of the increase of sulphur content; In pure iron or the siliconized plate, the sulphur content height, hysteresis loss increases.So desulfurization also is one of major objective in the smelting iron and steel.
Therefore, need badly a kind of have good vanadium extraction effect and a sweetening effectiveness contain vanadium iron mining and metallurgy sweetening process.
Summary of the invention
The objective of the invention is to solve at least one in the above-mentioned existing in prior technology deficiency.
For example, one of purpose of the present invention is to provide a kind of and can carries out the smelting process of effective vanadium extraction and desulfurization to containing the vanadium iron ore deposit.
The invention provides a kind of smelting process that contains the vanadium iron ore deposit.Described smelting process comprises following steps in sequence: adopt blast-furnace smelting to contain the vanadium iron ore deposit, obtain vanadium-bearing hot metal; Vanadium-bearing hot metal is carried out vanadium extraction by converter blowing, obtain half steel and vanadium slag respectively; Described half steel is carried out KR desulfurization or blowing desulfurization, and wherein, described half steel temperature is controlled to be 1350～1400 ℃.
Compared with prior art, the present invention can solve the not high problem of vanadium-bearing hot metal desulfuration efficiency under the situation that improves the vanadium extraction recovery rate, and can reduce desulphurization and slag skimming band iron amount and return sulfur content.
Embodiment
Hereinafter, will describe the smelting process that contains the vanadium iron ore deposit of the present invention in detail in conjunction with exemplary embodiment.
Through research, the contriver finds: owing to (for example contain the vanadium iron ore deposit, a large amount of vanadium titano-magnetites of depositing of composing) there is many difference in molten iron and the common molten iron that goes out through blast-furnace smelting, (for example, comprise that the furnace temperature level is low, the blast furnace sweetening power is poor, the molten iron of producing contains [S] amount and does not use the steel mill of vanadium titano-magnetite on average to exceed 0.030～0.040 percentage point than domestic other, low 40～50 ℃ of temperature etc.), therefore, to the vanadium-bearing hot metal that goes out through blast-furnace smelting when directly carrying out desulfurization, hot metal temperature drop is bigger, the slag attitude is bad, iron loss is bigger, particularly owing to the singularity of the vanadium-bearing hot metal that goes out through blast-furnace smelting, it can cause the sweetening agent unit consumption through after the sweetening process, degradation detrimentally affect under the obvious rising of iron loss and the desulfurization production capacity.
On the basis of the above, the contriver provides a kind of smelting process that contains the vanadium iron ore deposit.Described smelting process comprises following steps in sequence: adopt blast-furnace smelting to contain the vanadium iron ore deposit, obtain vanadium-bearing hot metal; Vanadium-bearing hot metal is carried out vanadium extraction by converter blowing, obtain half steel and vanadium slag respectively; Described half steel is carried out KR desulfurization or blowing desulfurization, and wherein, described half steel temperature is controlled to be 1350～1400 ℃, preferably, the half steel temperature is controlled to be 1370～1390 ℃.Good vanadium extraction effect and sweetening effectiveness can be obtained like this and iron loss can be reduced.Preferably, the described vanadium iron ore deposit that contains is vanadium titano-magnetite.
In an exemplary embodiment that contains vanadium iron mining and metallurgy smelting method of the present invention, the mixture of described blowing desulfurization step winding-up magnesium powder or winding-up magnesium powder and lime in the half steel.Yet blowing desulfurization step of the present invention also can adopt other desulfurizer powder.
In an exemplary embodiment that contains vanadium iron mining and metallurgy smelting method of the present invention, preferably, described KR desulfurized step control stirring velocity is 80～125r/min, and the control churning time is 15～45min, can obtain excellent desulfurizing effect more like this.Yet KR desulfurization parameter of the present invention is not limited thereto, and that is to say, during operation, can suitably adjust stirring velocity and time near above-mentioned scope.
In an exemplary embodiment that contains vanadium iron mining and metallurgy smelting method of the present invention, the sweetening agent add-on of described KR desulfurized step is controlled to be 10～25kg/tFe.Yet sweetening agent add-on of the present invention is not limited thereto, and for example, can suitably adjust its add-on according to the kind of sweetening agent.
In an exemplary embodiment that contains vanadium iron mining and metallurgy smelting method of the present invention, in described vanadium extraction by converter blowing step, preferably, the control oxygen supply intensity is 1.6～2.0Nm
3/ tmin, control bottom blowing nitrogen flow is 0.05～0.30Nm
3/ tmin, the control oxygen blow duration is 3～7min, the control oxygen lance position is 1.5～2.0m.Yet vanadium extraction by converter blowing parameter of the present invention is not limited thereto, and that is to say, during concrete operations, can suitably adjust oxygen supply intensity, bottom blowing nitrogen flow, oxygen blow duration, oxygen lance position near above-mentioned scope.
In an exemplary embodiment that contains vanadium iron mining and metallurgy smelting method of the present invention, described smelting process also comprises the step that vanadium slag is prepared as the vanadium goods, to realize containing effective utilization of vanadium in the vanadium iron ore deposit.
In another exemplary embodiment of the present invention, firm the sending out of smelting that contains the vanadium iron ore deposit also can adopt following mode to realize:
After the vanadium-bearing hot metal that obtains through blast-furnace smelting enters steel mill, earlier it to be carried out vanadium extraction by converter blowing and handle, oxygen supply intensity is by 1.6～2.0Nm in the vanadium extraction process
3/ tmin control, the bottom blowing nitrogen flow is by 0.05～0.30Nm
3/ tmin control, refrigerant is controlled by 20～40kg/tFe, and oxygen blow duration is by 3～7min control, oxygen lance position is by 1.5～2.0m control, the half steel temperature is poured half steel in the half steel jar into after vanadium extraction is finished by 1350～1400 ℃ of controls, and vanadium slag is poured the vanadium slag jar into and in order to produce the vanadium goods; Half steel is transported to the desulfurization station carry out desulfurization, under the situation that adopts the KR desulfurization, the stirring-head stirring velocity is 80～125r/min during the KR desulfurization, churning time 15～45min, and sorbent consumption is controlled by 10～25kg/tFe; Under the situation that adopts blowing desulfurization, can adopt single spray magnesium powder or adopt magnesium powder and lime to carry out the technology of mixed injection, concrete injection parameter is adjusted by actual half steel sulphur content.
In sum, the vanadium iron mining and metallurgy smelting method that contains of the present invention not only can be for carrying out maximized utilization with the vanadium in the vanadium-bearing hot metal; Can also improve desulfurization condition (improve temperature, reduce molten iron viscosity), thereby improve sweetening effectiveness, and can reduce iron loss, and reduce back sulfur content.In addition, method of the present invention also has the advantage that the technological process of production is simple and linking is smooth.
In order to understand the present invention better, further specify exemplary embodiment of the present invention below in conjunction with concrete example.
Example 1
Vanadium-bearing hot metal carries out the vanadium extraction by converter blowing processing earlier after entering steel mill, and oxygen supply intensity is pressed 1.6Nm in the vanadium extraction process
3/ tmin control, the bottom blowing nitrogen flow is pressed 0.30Nm
3/ tmin control, refrigerant is controlled by 30kg/tFe, oxygen blast 6min, oxygen lance position is by 1.5～2.0m control, and the half steel temperature is 1360 ℃ after the vanadium extraction, after vanadium extraction is finished half steel is poured in the half steel jar; Half steel is carried out the KR desulfurization, and the stirring-head stirring velocity is 110r/min, churning time 25min, and sorbent consumption is controlled by 21kg/tFe.Vanadium after the vanadium extraction in the molten iron drops to 0.031% of half steel from 0.298%; After the desulfurization, sulphur 0.083% during from molten iron has been reduced to 0.011%.
Example 2
Vanadium-bearing hot metal carries out the vanadium extraction by converter blowing processing earlier after entering steel mill, and oxygen supply intensity is pressed 2.0Nm in the vanadium extraction process
3/ tmin control, the bottom blowing nitrogen flow is pressed 0.05Nm
3/ tmin control, refrigerant is controlled by 36kg/tFe, oxygen blast 5.5min, oxygen lance position is by 1.5～2.0m control, and the half steel temperature is 1372 ℃ after the vanadium extraction, after vanadium extraction is finished half steel is poured in the half steel jar; Half steel is carried out blowing desulfurization, winding-up lime 866kg, magnesium powder 237kg.Vanadium after the vanadium extraction in the molten iron drops to 0.053% of half steel from 0.328%; After the desulfurization, sulphur 0.077% during from molten iron has been reduced to 0.006%.
Although described the present invention in conjunction with exemplary embodiment above, those of ordinary skills should be clear, under the situation of the spirit and scope that do not break away from claim, can carry out various modifications to above-described embodiment.
Claims (8)
1. a smelting process that contains the vanadium iron ore deposit is characterized in that, described smelting process comprises following steps in sequence:
Adopt blast-furnace smelting to contain the vanadium iron ore deposit, obtain vanadium-bearing hot metal;
Vanadium-bearing hot metal is carried out vanadium extraction by converter blowing, obtain half steel and vanadium slag respectively;
Described half steel is carried out KR desulfurization or blowing desulfurization, and wherein, described half steel temperature is controlled to be 1350～1400 ℃.
2. the smelting process that contains the vanadium iron ore deposit according to claim 1 is characterized in that, the mixture of described blowing desulfurization step winding-up magnesium powder or winding-up magnesium powder and lime in the half steel.
3. the smelting process that contains the vanadium iron ore deposit according to claim 1 is characterized in that, described KR desulfurized step control stirring velocity is 80～125r/min, and the control churning time is 15～45min.
4. the smelting process that contains the vanadium iron ore deposit according to claim 1 is characterized in that, the sweetening agent add-on of described KR desulfurized step is controlled to be 10～25kg/tFe.
5. the smelting process that contains the vanadium iron ore deposit according to claim 1 is characterized in that, in the described vanadium extraction by converter blowing step, the control oxygen supply intensity is 1.6～2.0Nm
3/ tmin, control bottom blowing nitrogen flow is 0.05～0.30Nm
3/ tmin, the control oxygen blow duration is 3～7min, the control oxygen lance position is 1.5～2.0m.
6. the smelting process that contains the vanadium iron ore deposit according to claim 1 is characterized in that, described smelting process also comprises the step that vanadium slag is prepared as the vanadium goods.
7. the smelting process that contains the vanadium iron ore deposit according to claim 1 is characterized in that, the described vanadium iron ore deposit that contains is vanadium titano-magnetite.
8. the smelting process that contains the vanadium iron ore deposit according to claim 1 is characterized in that, described half steel temperature is controlled to be 1370～1390 ℃.
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| CN2013101505085A CN103194567A (en) | 2013-04-26 | 2013-04-26 | Smelting process of iron ore containing vanadium |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103525978A (en) * | 2013-10-14 | 2014-01-22 | 攀钢集团攀枝花钢铁研究院有限公司 | Semisteel pretreatment powder and preparation method thereof, and smelting method of vanadium-containing molten iron |
| CN103642969A (en) * | 2013-12-03 | 2014-03-19 | 攀钢集团攀枝花钢铁研究院有限公司 | Resulfurization control method in process of smelting electric steel from vanadium/titanium-containing molten iron |
| CN103757179A (en) * | 2013-12-30 | 2014-04-30 | 攀钢集团西昌钢钒有限公司 | Method for deeply desulfurizing semisteel |
| CN103773918A (en) * | 2013-12-30 | 2014-05-07 | 攀钢集团西昌钢钒有限公司 | Method for reducing resulfurization of semisteel-making converter |
| CN103981322A (en) * | 2014-05-05 | 2014-08-13 | 攀钢集团攀枝花钢铁研究院有限公司 | Top-bottom combined blowing converter vanadium extraction method |
| CN104060045A (en) * | 2013-10-24 | 2014-09-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Method using vanadium-titanium molten iron for smelting low oxygen low carbon IF (interstitial-free) steel |
| CN105018678A (en) * | 2015-08-04 | 2015-11-04 | 承德建龙特殊钢有限公司 | Steel-making desulfurizing agent, desulfurizing method thereof and steel making method |
| CN109971912A (en) * | 2019-05-16 | 2019-07-05 | 成都先进金属材料产业技术研究院有限公司 | Converter molten iron adds the method for lime production calcic vanadium slag and its leaching |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103525978A (en) * | 2013-10-14 | 2014-01-22 | 攀钢集团攀枝花钢铁研究院有限公司 | Semisteel pretreatment powder and preparation method thereof, and smelting method of vanadium-containing molten iron |
| CN104060045A (en) * | 2013-10-24 | 2014-09-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Method using vanadium-titanium molten iron for smelting low oxygen low carbon IF (interstitial-free) steel |
| CN104060045B (en) * | 2013-10-24 | 2016-08-24 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of vanadium-titanium-iron-water smelts the method for the low carbon IF steel of hypoxia |
| CN103642969A (en) * | 2013-12-03 | 2014-03-19 | 攀钢集团攀枝花钢铁研究院有限公司 | Resulfurization control method in process of smelting electric steel from vanadium/titanium-containing molten iron |
| CN103757179A (en) * | 2013-12-30 | 2014-04-30 | 攀钢集团西昌钢钒有限公司 | Method for deeply desulfurizing semisteel |
| CN103773918A (en) * | 2013-12-30 | 2014-05-07 | 攀钢集团西昌钢钒有限公司 | Method for reducing resulfurization of semisteel-making converter |
| CN103773918B (en) * | 2013-12-30 | 2015-11-18 | 攀钢集团西昌钢钒有限公司 | A kind ofly reduce the method that sulphur is returned in semi-steel making converter |
| CN103981322A (en) * | 2014-05-05 | 2014-08-13 | 攀钢集团攀枝花钢铁研究院有限公司 | Top-bottom combined blowing converter vanadium extraction method |
| CN105018678A (en) * | 2015-08-04 | 2015-11-04 | 承德建龙特殊钢有限公司 | Steel-making desulfurizing agent, desulfurizing method thereof and steel making method |
| CN105018678B (en) * | 2015-08-04 | 2018-03-27 | 承德建龙特殊钢有限公司 | A kind of steel desulfurization agent and its sulfur method and method for making steel |
| CN109971912A (en) * | 2019-05-16 | 2019-07-05 | 成都先进金属材料产业技术研究院有限公司 | Converter molten iron adds the method for lime production calcic vanadium slag and its leaching |
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Owner name: PANGANG GROUP XICHANG STEEL + VANADIUM CO., LTD. Effective date: 20140130 |
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Effective date of registration: 20140130 Address after: 617000 Taoyuan street, Panzhihua, Sichuan, No. 90 Applicant after: Pangang Group Panzhihua Iron & Steel Research Institute Co., Ltd. Applicant after: Pangang Group Xichang Steel & Vanadium Co., Ltd. Address before: 617000 Taoyuan street, Panzhihua, Sichuan, No. 90 Applicant before: Pangang Group Panzhihua Iron & Steel Research Institute Co., Ltd. |
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Application publication date: 20130710 |