CN1064718C - Vanadium pellet for steel smelting and alloyage process thereof - Google Patents
Vanadium pellet for steel smelting and alloyage process thereof Download PDFInfo
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- CN1064718C CN1064718C CN98123569A CN98123569A CN1064718C CN 1064718 C CN1064718 C CN 1064718C CN 98123569 A CN98123569 A CN 98123569A CN 98123569 A CN98123569 A CN 98123569A CN 1064718 C CN1064718 C CN 1064718C
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- vanadium
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Abstract
The present invention relates to a vanadium ball for steel smelting and an alloying method thereof, which belongs to the field of steel melting. The vanadium ball is proportionally composed of raw materials of 65 to 85 wt% of vanadium residues, 2 to 5 wt% of smelting agents, 6 to 25 wt% of reducing agents and 7 to 10 wt% of adhesives. The method comprises the step of adding the vanadium ball with the components in the alloying process of steel smelting to enhance the vanadium content in steel. In the process of converter steel smelting, when 1/4 to 1/3 of molten steel is obtained, the vanadium ball is slowly added to a steel ladle with alloy materials. In the process of electric-arc furnace steel smelting, at the oxidation end of electric-arc furnace steel smelting, after oxidizing residues are removed, 0.7 to 1.2 kilograms of aluminium is added to each ton of steel, preliminary deoxidization is carried out, fresh residues are produced, and 6 to 25 kilograms of vanadium balls are added to each ton of steel. The present invention has the advantages of low production cost and simple method and solves problems of steel caking, flying loss, etc.
Description
The present invention is a kind of vanadium pellet for steel smelting and alloyage process thereof, belongs to field of steel-making.
At present, domestic and international many Steel Plant mainly adopt when smelting contains vanadium steel in steel and to add vanadium iron and carry out vanadium alloying.But because vanadium iron costs an arm and a leg, make that to contain the vanadium steel cost higher, especially the low-alloy that market demand is bigger (for example: the new III level of 20MnSiV Deformed Steel Bars), because of the production cost height, be difficult to be used widely contains vanadium steel.For reduction contains the vanadium steel cost, each Steel Plant has adopted different vanadium alloying methods, but does not all obtain effect preferably.As use Vanadium Pentoxide in FLAKES as the alloying raw material, but its cost a little less than vanadium iron, cost an arm and a leg, thereby be difficult to widespread use.And use the vanadium slag DIRECT ALLOYING, though can reduce cost, there is following shortcoming in it: 1, converter steelmaking adds the easy conglomeration of back Yin Baonei molten steel dynamic conditions difference, and composition is inhomogeneous; 2, operating environment is poor, and it is bigger to fly upward loss.
The purpose of this invention is to provide a kind of vanadium pellet for steel smelting and alloyage process thereof.This method is that vanadium slag is formed pelletizing, increase the vanadium effect by in the steelmaking alloy process, adding the vanadium ball in the steel to play, thereby solve the problem that above-mentioned vanadium alloying exists, promote the alloying of v element, make that content of vanadium reaches product requirement in the steel, and reduce greatly and contain the vanadium steel cost.
The object of the present invention is achieved like this: adding with carbon dust etc. in the steelmaking alloy process is reductive agent, and vanadium slag, flux are raw material, and the pelletizing that adding additives is made is to increase the vanadiumcontent in the steel.
Adopt the vanadium ball to smelt when containing vanadium steel, in convertor steelmaking process, go out by 1/4～1/3 o'clock at molten steel, with the vanadium ball along with alloy material slowly adds in the ladle together; In electric arc furnace or corresponding external refining device steelmaking process, in electric-arc furnace steelmaking oxidation latter stage, remove oxidation sludge after, insert aluminium 0.7～1.2kg/t steel, carry out pre-deoxidation, make new slag and add vanadium ball 6～25kg/t steel.
Describe the present invention below: one, the preparation of vanadium pellet for steel smelting
Described vanadium ball is by vanadium slag, flux, and reductive agent and binding agent are formed.Its proportioning raw materials (weight %) is: vanadium slag 65～85%, flux 2～5%, reductive agent 6～25%, binding agent 7～10%.Described vanadium slag is for containing V
2O
5〉=13% vanadium slag, described flux are any in fluorite or the lime, and described reductive agent is any one or more in carbon dust, graphite, silicon carbide and the carbide of calcium, and described binding agent is any in water glass, spent pulping liquor, molasses and the humic acid.CaF in the described fluorite
2〉=50%, CaO in the described lime 〉=70%, fixed carbon in the described carbon dust 〉=70%, S≤0.04%.
The batching of above-mentioned composition is broken respectively, processing make its granularity＜1mm, with the batch mixes after the fragmentation together, again through making ball, drying, prepare required vanadium ball, and described vanadium ball is the pelletizing of granularity≤50mm.
The vanadium ball can adopt following method preparation: the granularity that 1, raw materials such as vanadium slag, reductive agent, flux is become 5～50mm with crusher in crushing.2, above-mentioned raw materials further is processed into the fine powder of 0.18～0.08mm, to increase specific surface area separately.3, above-mentioned powdered vanadium slag, reductive agent, flux are added in the stirrer by weight mix, add the binding agent mixing of specified amount again.4, compound is pressed into≤pelletizing of 50mm with the pressure pelletizer, looses shape material inconvenience transportation and fly upward the big problem of loss to solve, and strengthen the operability of steelmaking alloy process.5, above-mentioned vanadium pelletizing is placed on the dry kiln drying of temperature 〉=300 ℃, general storing time 〉=3 hours makes vanadium ball moisture content≤2%, thereby increases vanadium ball ultimate compression strength.Two, smelt the method that contains vanadium steel with the vanadium ball
Adding with carbon dust etc. in the steelmaking alloy process is reductive agent, and vanadium slag, flux are raw material, and the pelletizing that adding additives is made is to increase the vanadiumcontent in the steel.Adopt the vanadium ball to smelt when containing vanadium steel, when in converter, using, before tapping, add slag retaining cap, in tapping process, add slag-blocking ball, to reduce slag down.Go out by 1/4～1/3 o'clock at molten steel, along with alloy material slowly adds in the ladle together, vanadium ball add-on is 6～15kg/t steel with the vanadium ball; In electric arc furnace or corresponding external refining device steelmaking process, in electric-arc furnace steelmaking oxidation latter stage, after removing oxidation sludge, add aluminium 0.7～1.2kg/t steel, carry out pre-deoxidation, make new slag and add vanadium ball 6～25kg/t steel, add diffusion deoxidizer by processing requirement again, it is 2～3.5 that adding lime makes basicity, can tap after slag bleaches, and the recovery rate of vanadium is 80～90%.
Vanadium ball use carbon dust of the present invention etc. is made reductive agent, and its reaction product is a gas, and constantly gets rid of, to the V in the vanadium slag
2O
5Reduce very favourablely, because the continuous eliminating of reduzate CO gas has improved the dynamic conditions of molten steel in ladle, help the eliminating of oxide compound, thereby avoided the clustering phenomena after the fusing of vanadium ball.Adopt the vanadium ball to smelt when containing vanadium steel, add vanadium ball in the bag under 1600 ℃ of temperature, the fusing of bursting apart voluntarily, reduction reaction is more thorough, and is difficult for conglomeration, uniform ingredients in the steel.
Embodiment:
Adopt vanadium ball of the present invention and alloyage process thereof, in 20 tons of top-blown oxygen converters, make steel vanadium ball alloying.
The proportioning raw materials of used vanadium ball (weight %) is: vanadium slag (V
2O
5〉=13%) 74%, fluorite (CaF
2〉=50%) 3.5%, carbon dust (fixed carbon 〉=70%, S≤0.04%) 14%, water glass 8.5%.
Vanadium slag, carbon dust, fluorite are broken into the granularity of 5～50mm with jaw crusher, again above-mentioned raw materials are machined to the fine powder of 0.18～0.08mm with raymond grinding powder.Above-mentioned powdered vanadium slag, carbon dust, fluorite by mixing in the above-mentioned weight ratio adding stirrer, are added the water glass mixing of specified amount again.Compound is pressed into≤the vanadium pelletizing of 50mm with the pressure pelletizer, above-mentioned vanadium pelletizing is placed on the dry kiln drying of temperature 〉=300 ℃, storing time is 5 hours, makes vanadium ball moisture content≤2%.
Be example with the three stove 20MnSiV steel of smelting now, steelmaking process interalloy add-on sees Table 1, and finished product composition and recovery rate see Table 2, and the mechanical property that is rolled into behind the new III level 400MPa Twisted Steel sees Table 3.
Table 1 embodiment alloy raw material add-on
| Heat (batch) number | Molten steel amount (t) | Alloy addition (kg) | ||
| Fe-Si | Fe-Mn | The vanadium ball | ||
| 2812913 | 32．5 | 300 | 719 | 380 |
| 2813411 | 34．7 | 300 | 814 | 290 |
| 2822446 | 32．7 | 273 | 780 | 380 |
Table 2 embodiment finished product composition and recovery rate
| Heat (batch) number | Chemical Composition (%) | Recovery rate (%) | |||||
| C | Si | Mn | P | S | V | V | |
| 2812913 | 0．23 | 0．55 | 1．27 | 0．019 | 0．027 | 0．047 | 73．4 |
| 2813411 | 0．23 | 0．55 | 1．34 | 0．028 | 0．026 | 0．039 | 85．2 |
| 2822446 | 0．23 | 0．47 | 1．29 | 0．019 | 0．031 | 0．051 | 74．3 |
The Twisted Steel mechanical property that table 3 embodiment is rolling
| Heat (batch) number | Specification (mm) | Surrender (Mpa) | Tensile strength (Mpa) | Elongation (%) | Clod wash | Recurvation | Negative deviation |
| 2812913 | φ18 | 450/455 | 630/645 | 20/19 | Intact | Intact | 3．22 |
| 2813411 | φ20 | 415/430 | 590/615 | 23/20 | Intact | Intact | 5．09 |
| 2822446 | φ20 | 455/450 | 615/610 | 21/22 | Intact | Intact | 2．68 |
The present invention compared with prior art has following advantage: 1, adopt vanadium ball of the present invention, production cost is low, method is simple, ton vanadium ball cost is about 6000 yuan/ton, and Vanadium Pentoxide in FLAKES, vanadium iron cost are all more than 120,000 yuan/ton, the vanadium ball is compared with the vanadium slag DIRECT ALLOYING, has solved conglomeration in the steel, has flown upward problems such as loss, has improved operability.2, behind the employing vanadium ball alloyage process of the present invention, vanadium ball consumption is respectively 11.7kg/t, 8.4kg/t and 11.6kg/t, the vanadium alloying cost that contains vanadium steel can reduce by 40～50%, ton steel cost descends 63 yuan/ton, if by smelting 500,000 tons of/year calculating of vanadium steel, can obtain 3,150 ten thousand yuan of direct economic benefits, have high economic benefit.
Claims (6)
1, a kind of vanadium pellet for steel smelting, it is characterized in that described vanadium ball is by vanadium slag, flux, reductive agent and binding agent are formed, and its proportioning raw materials (weight %) is: vanadium slag 65～85%, flux 2～5%, reductive agent 6～25%, binding agent 7～10%, described flux are any in fluorite or the lime, described reductive agent is any one or more in carbon dust, graphite, silicon carbide and the carbide of calcium, and described binding agent is any in water glass, spent pulping liquor and the molasses.
2, vanadium ball as claimed in claim 2 is characterized in that described vanadium slag is for containing V
2O
5〉=13% vanadium slag, CaF in the described fluorite
2〉=50%, CaO in the described lime 〉=70%, fixed carbon in the described carbon dust 〉=70%, S≤0.04%.
3, the preparation method of vanadium ball as claimed in claim 1 is characterized in that:
(1), raw materials such as vanadium slag, reductive agent, flux is become the granularity of 5～50mm with crusher in crushing;
(2), above-mentioned raw materials further is processed into the fine powder of 0.18～0.08mm;
(3), above-mentioned powdered vanadium slag, reductive agent, flux added in the stirrer by weight percentage mix, add the binding agent mixing of specified amount again;
(4), compound is pressed into≤pelletizing of 50mm with the pressure pelletizer;
(5), above-mentioned vanadium pelletizing is placed on the dry kiln drying of temperature 〉=300 ℃, storing time 〉=3 hour make vanadium ball moisture content≤2%.
4, a kind of method that contains vanadium steel with the described vanadium ball smelting of claim 1, it is characterized in that in the steelmaking alloy process, adding the vanadium ball to increase the vanadiumcontent in the steel, described vanadium ball is by vanadium slag, flux, reductive agent and binding agent are formed, and its proportioning raw materials (weight %) is: vanadium slag 65～85%, flux 2～5%, reductive agent 6～25%, binding agent 7～10%.
5, method as claimed in claim 4 is characterized in that in convertor steelmaking process, go out by 1/4～1/3 o'clock at molten steel, with the vanadium ball along with alloy material slowly adds in the ladle together.
6, method as claimed in claim 5, it is characterized in that in steel-making course of the electric arc furnace, in electric-arc furnace steelmaking oxidation latter stage, after removing oxidation sludge, add aluminium 0.7～1.2kg/t steel, carry out pre-deoxidation, make new slag and add vanadium ball 6～25kg/t steel, add diffusion deoxidizer by processing requirement again, it is 2～3.5 that adding lime makes basicity, tapping after slag bleaches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98123569A CN1064718C (en) | 1998-11-02 | 1998-11-02 | Vanadium pellet for steel smelting and alloyage process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98123569A CN1064718C (en) | 1998-11-02 | 1998-11-02 | Vanadium pellet for steel smelting and alloyage process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1215090A CN1215090A (en) | 1999-04-28 |
| CN1064718C true CN1064718C (en) | 2001-04-18 |
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|---|---|---|---|
| CN98123569A Expired - Fee Related CN1064718C (en) | 1998-11-02 | 1998-11-02 | Vanadium pellet for steel smelting and alloyage process thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102864271A (en) * | 2012-09-21 | 2013-01-09 | 承德建龙特殊钢有限公司 | Digestion process of vanadium extraction waste slag in semi-steel steelmaking converter |
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| CN100469932C (en) * | 2007-06-05 | 2009-03-18 | 钢铁研究总院 | V2O5 direct alloying steelmaking technology |
| CN101798618B (en) * | 2010-03-26 | 2012-03-21 | 河北钢铁股份有限公司承德分公司 | Method for performing vanadium increase and refining in vanadium alloying by utilizing vanadium slag |
| CN101838743B (en) * | 2010-06-23 | 2012-05-23 | 攀枝花学院 | Method for recovering ferrum, vanadium, chromium and gallium from vanadium extraction tailings |
| CN102304604A (en) * | 2011-08-31 | 2012-01-04 | 河北钢铁股份有限公司承德分公司 | Smelting technology of III grade hot-rolled ribbed bars |
| CN102605140B (en) * | 2012-03-05 | 2013-08-28 | 石家庄钢铁有限责任公司 | Manufacturing method of molybdenum or vanadium oxide briquetting for steelmaking alloying |
| CN103820597B (en) * | 2014-02-20 | 2015-07-01 | 河北钢铁股份有限公司承德分公司 | Efficient utilization method of residual vanadium in semisteel |
| CN105821281B (en) * | 2016-03-29 | 2017-12-26 | 马鞍山市兴达冶金新材料有限公司 | A kind of direct steelmaking metal of alloying oxide core-spun yarn and preparation method thereof |
| CN106498156A (en) * | 2016-10-19 | 2017-03-15 | 江苏省冶金设计院有限公司 | A kind of lead cadmia balling technique |
| CN111088425B (en) * | 2019-07-12 | 2021-09-03 | 淄博淄翼金属科技有限公司 | Composite alloy capable of replacing ferrovanadium alloy and production process and application thereof |
| CN115074484A (en) * | 2022-06-29 | 2022-09-20 | 山东钢铁股份有限公司 | Production process for smelting vanadium microalloyed steel by vanadium oxide self-reduction |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU605839A1 (en) * | 1976-05-21 | 1978-05-05 | Предприятие П/Я Р-6205 | Method of smelting vanadium-containing steels and alloying-reducing mixture for effecting same |
| SU665003A1 (en) * | 1977-10-17 | 1979-05-30 | Уральский научно-исследовательский институт черных металлов | Method of manufacturing vanadium-containing steel |
| SU1186653A1 (en) * | 1984-05-29 | 1985-10-23 | Научно-исследовательский институт металлургии | Method of steel melting in electric arc furnace |
-
1998
- 1998-11-02 CN CN98123569A patent/CN1064718C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU605839A1 (en) * | 1976-05-21 | 1978-05-05 | Предприятие П/Я Р-6205 | Method of smelting vanadium-containing steels and alloying-reducing mixture for effecting same |
| SU665003A1 (en) * | 1977-10-17 | 1979-05-30 | Уральский научно-исследовательский институт черных металлов | Method of manufacturing vanadium-containing steel |
| SU1186653A1 (en) * | 1984-05-29 | 1985-10-23 | Научно-исследовательский институт металлургии | Method of steel melting in electric arc furnace |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102864271A (en) * | 2012-09-21 | 2013-01-09 | 承德建龙特殊钢有限公司 | Digestion process of vanadium extraction waste slag in semi-steel steelmaking converter |
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|---|---|
| CN1215090A (en) | 1999-04-28 |
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Owner name: CHENGDE XINXIN VANADIUM-TITANIUM CO., LTD. Free format text: FORMER OWNER: CHENGDE IRON AND STEEL GROUP CO., LTD. Effective date: 20010911 |
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Effective date of registration: 20010911 Address after: Chengde Hebei Xinxin vanadium titanium Limited by Share Ltd Technology Center Patentee after: Xinxin Vanadium Titanium Co., Ltd., Chengde City Address before: The Luanhe River town of Hebei city of Chengde province Shuangluan District Patentee before: Chengde Iron & Steel Group Co., Ltd. |
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