CN102864270B - Vanadium extraction cooling agent and preparation method thereof - Google Patents
Vanadium extraction cooling agent and preparation method thereof Download PDFInfo
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- CN102864270B CN102864270B CN201210342561.0A CN201210342561A CN102864270B CN 102864270 B CN102864270 B CN 102864270B CN 201210342561 A CN201210342561 A CN 201210342561A CN 102864270 B CN102864270 B CN 102864270B
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Abstract
The invention discloses a vanadium extraction cooling agent, which comprises the following components in percentage by weight: 40-82 percent of vanadium extraction dust removing ash, 12-52 percent of oxide iron scale and 6-8 percent of binding agent. The invention also discloses a preparation method of the vanadium extraction cooling agent. The preparation method comprises the following steps of: proportioning 40-82 percent of vanadium extraction dust removing ash, 12-52 percent of oxide iron scale and 6-8 percent of binding agent by weight; mixing the proportioned materials; adding water while mixing, wherein the mass ratio of the water to the materials is 3:50-5:50; briquetting the uniformly mixed materials; and drying the pressed blocks to obtain the vanadium extraction cooling agent. According to the vanadium extraction cooling agent and the preparation method thereof, the one-time block forming rate of the vanadium extraction cooling agent is over 92 percent, the TFe content reaches over 60 percent, less P, S, water and the like are included, the requirements on use as the vanadium extraction cooling agent are fully met, the dust removing ash produced by the vanadium extraction of a converter can be completely and effectively utilized, the cost is saved, the requirements on vanadium extraction production of the converter can be completely met, and the maximum utilization of a vanadium resource is facilitated.
Description
Technical field
The present invention relates to a kind of refrigerant for vanadium extraction by converter blowing and preparation method thereof, more particularly, relate to a kind of vanadium-raising cooling agent taking vanadium extraction dedusting ash as raw material and preparation method thereof.
Background technology
China is vanadium titano-magnetite big country, and the molten iron that vanadium titano-magnetite goes out by blast-furnace smelting is compared with common molten iron, and its content of vanadium is high, and vanadium is a kind of important resource, therefore must vanadium extraction before molten iron-steelmaking and produce vanadium slag.At present, the production method of producing vanadium slag is both at home and abroad more, mainly contains New Zealand's hot metal ladle and blows vanadium technique, South Africa shaking ladle process for extracting vanadium, Russia and Chinese vanadium extraction by converter blowing technique 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 technique optimum, technico-economical comparison is best.
At present, the production technique of domestic and international vanadium extraction by converter blowing is mainly by adding refrigerant, control process temperature and duration of blast to realize.Vanadium extraction from hot metal is a selective oxidation technology, and Converter Oxigen Blowing vanadium extraction is an exothermic process, the element oxidations such as Si, Mn, V, C can make molten bath be rapidly heated, and before the oxidation of Si, Mn occurs in V oxidation, vanadium extraction can not suppress its reaction, therefore will obtain high oxidation rate and the recovery rate of vanadium, must add vanadium-raising cooling agent control bath temperature, bath temperature is remained on below carbon vanadium invert point, reach the object of vanadium extraction guarantor carbon, V content is down to below 0.05wt%.In addition, the waste gas producing in vanadium extraction from hot metal process generally adopts dry method dust processing, and dry method dust can produce a large amount of solid waste---dedusting ash in the time of the process of processing, and vanadium extraction dedusting ash contains a large amount of iron compounds, is valuable secondary resource.
The cooling of molten iron is the emphasis that vanadium extraction by converter blowing is produced.The cooling of molten iron is mainly to add refrigerant in molten iron, and at present conventional refrigerant is just like common iron ore, cooled agglomerated pellet, steel scrap, iron scale and high-grade ore etc.Climbing the factory owners such as steel vanadium, will to adopt iron scale, ferric oxide ball and cooled agglomerated pellet be refrigerant, after cooling system improves, and v slag grade >=17.5wt%, the residual vanadium≤0.04wt% of half steel, vanadium recovery >=80.0%.
Publication number is that the Chinese patent application of CN1789435A discloses a kind of vanadium extraction from hot metal control calcium refrigerant and vanadium extraction from hot metal control calcium technique, the chemical composition of its vanadium-raising cooling agent is: iron scale 56～60wt%, fine iron breeze 30～40wt%, bonding agent 5～10wt%, this refrigerant can increase extraction yield and the v slag grade of vanadium, stablizes vanadium slag calcium oxide content.Publication number is that the Chinese patent application of CN101338351A discloses a kind of vanadium-raising cooling agent and preparation method thereof and using method, this refrigerant taking iron scale or vanadium extraction mud, containing vanadium iron concentrate, bonding agent as raw material production, the ferriferous oxide that contains 80～95wt%, the SiO of 3～6wt%
2, 0.1～0.6wt% V
2o
5, 1～3wt%MgCl
2.Publication number is that the Chinese patent application of CN102251068A discloses a kind of vanadium-raising cooling agent and preparation method thereof, and it adopts steel-smelting sewage sludge and cutting slag is raw material.Publication number is that the Chinese patent application of CN102586537A discloses a kind of vanadium-raising cooling agent, and it adopts desulfurization granulated iron and iron scale to add that caking agent produces, but desulfurization granulated iron inevitably contains higher sulphur, affects half steel quality.
Summary of the invention
The object of the invention is to solve the recycling problem of the dedusting ash that dry method dust in vanadium extraction by converter blowing production process produces, provide a kind of taking vanadium extraction dedusting ash as raw material vanadium-raising cooling agent and preparation method thereof, the utilization that realizes resource maximizes.
To achieve these goals, an aspect of of the present present invention provides a kind of vanadium-raising cooling agent, and described vanadium-raising cooling agent comprises vanadium extraction dedusting ash, the iron scale of 12～52wt% and the bonding agent of 6～8wt% of 40～82wt%.
According to vanadium-raising cooling agent of the present invention embodiment, described vanadium extraction dedusting ash comprises the vanadium extraction one-time dedusting ash of 10～32wt% and the vanadium extraction final dusting ash of 30～50wt%.
According to vanadium-raising cooling agent of the present invention embodiment, TFe content > 62wt%, P content < 0.09wt%, S content < 0.06wt% in described vanadium extraction one-time dedusting ash; TFe content > 67wt%, P content < 0.06wt%, S content < 0.05wt% in described vanadium extraction final dusting ash.
According to vanadium-raising cooling agent of the present invention embodiment, described iron scale is hot rolling iron scale, wherein, TFe content > 65wt%, P content < 0.02wt%, S content < 0.03wt%.
According to vanadium-raising cooling agent of the present invention embodiment, described bonding agent is at least one in wilkinite, cement, diatomite.
Another aspect of the present invention provides a kind of preparation method of above-mentioned vanadium-raising cooling agent, and described preparation method comprises the following steps:
By vanadium extraction dedusting ash, the iron scale of 12～52 parts and the bonding agent mixing of 6～8 parts of 40～82 parts are prepared burden by weight;
The material preparing is carried out to batch mixing, add water when batch mixing, the weight ratio of water and material is 3: 50～5: 50;
The material mixing is carried out to briquetting, after the material piece suppressing is dried, obtain described vanadium-raising cooling agent.
According to the preparation method of vanadium-raising cooling agent of the present invention embodiment, described vanadium extraction dedusting ash comprises by weight the vanadium extraction one-time dedusting ash of 10～32 parts and the vanadium extraction final dusting ash of 30～50 parts.
According to the preparation method of vanadium-raising cooling agent of the present invention embodiment, described preparation method also comprises the step that does not just become the material of material piece to return to again briquetting.
The present invention compared with prior art, has the advantages such as cost is low, production technique is simple, resource utilization is high, good cooling results.The dedusting ash not only can be completely vanadium extraction by converter blowing being produced effectively utilize, cost-saving, and can adapt to vanadium extraction by converter blowing production requirement completely, be conducive to the maximum using of vanadium resource, be enterprise's create beneficial result.
Embodiment
To describe in detail according to vanadium-raising cooling agent of the embodiment of the present invention and preparation method thereof below.
Vanadium-raising cooling agent according to the present invention comprises vanadium extraction dedusting ash, the iron scale of 12～52wt% and the bonding agent of 6～8wt% of 40～82wt%.
Vanadium extraction dedusting ash of the present invention refers to the dust that vanadium extraction by converter blowing obtains while adopting dry-dedusting system to process flue gas in producing, and its composition is mainly the TiO of CaO, the 10wt% left and right of TFe, the 5wt% left and right of 65wt% left and right
2, the MgO of about 10wt% and the Al of surplus
2o
3deng.Adopt vanadium extraction dedusting ash to be as the benefit of refrigerant, TFe content is wherein high, CaO content is low, is conducive to the control of vanadium slag quality.
In one exemplary embodiment of the present invention, vanadium extraction dedusting ash specifically comprises the vanadium extraction one-time dedusting ash of 10～32wt% and the vanadium extraction final dusting ash of 30～50wt%, wherein, vanadium extraction one-time dedusting ash is the dust that dry-dedusting system EC and EP dust removal process produce; Vanadium extraction final dusting ash is the EP dedusting dust that bag-type dust process produces afterwards, and wherein, EC is flue-gas-cooling system, and EP is flue gas purification system or is called flue gas electrostatic precipitation system.According to the present invention, TFe content > 62wt%, P content < 0.09wt%, S content < 0.06wt% in vanadium extraction one-time dedusting ash; TFe content > 67wt%, P content < 0.06wt%, S content < 0.05wt% in vanadium extraction final dusting ash.
Iron scale of the present invention is the oxide shell producing in the each technological process of ferrous metallurgy, and its main component is ferric oxide or iron protoxide.For example,, from the oxide shell in steel rolling or casting process.Ferric oxide micromicro improves slag fluidity, is also conducive to dephosphorization, and can lower the temperature.
Preferably, iron scale of the present invention is hot rolling iron scale, wherein, and TFe content > 65wt%, P content < 0.02wt%, S content < 0.03wt%.In addition, the iron scale that certainly also can adopt machining or continuous casting to produce, is mainly the reason larger based on its stock number and select hot rolling iron scale.
Particularly, the bonding agent adopting in vanadium-raising cooling agent of the present invention is at least one in wilkinite, cement, diatomite, can specifically select according to need of production and practical situation.
Correspondingly, the present invention also provides the preparation method of above-mentioned vanadium-raising cooling agent, and described preparation method comprises the following steps: by vanadium extraction dedusting ash, the iron scale of 12～52 parts and the bonding agent mixing of 6～8 parts of 40～82 parts are prepared burden by weight; The material preparing is carried out to batch mixing, add water when batch mixing, the weight ratio of water and material is 3: 50～5: 50; The material mixing is carried out to briquetting, after the material piece suppressing is dried, obtain described vanadium-raising cooling agent.Wherein, in vanadium-raising cooling agent, the ratio of each composition has mainly considered that cooling performance and result of use arrange, because the granularity of vanadium extraction dedusting ash is little, if the ratio of vanadium extraction dedusting ash is too much or the very few piece rate that all will affect into, and the ratio of iron scale also must be suitable, otherwise the TFe content in the vanadium-raising cooling agent after briquetting is higher, in vanadium extracting process, can make the TFe content in vanadium slag also higher.
When batch mixing, add a certain amount of water to carry out moistening, can make vanadium extraction dedusting ash, iron scale be combined better with bonding agent, improve the one-tenth piece rate of vanadium-raising cooling agent and the intensity of material piece.Wherein, the weight ratio of water and material is 3: 50～5: 50.Preferably, the weight ratio of water and material is 3: 50.Batch mixing specifically can adopt the mechanical stirring mixing equipment that mixer, stirrer etc. are conventional.
In addition, after vanadium-raising cooling agent raw material is mixed, being pressed into material piece is mainly because material piece is beneficial to blanking, and can improve the utilization ratio of material.If but expect that the moisture in piece is excessive, the dangerous phenomenon of large spray in possible producer therefore should will expect re-use after piece is dried as far as possible.For example, by packaged the wet feed suppressing enter in iron railings hopper, natural air drying two days; Or, the warm air drying by the wet feed piece suppressing through 200 DEG C.
When batching, the material that can prepare as required gross weight and be 5～15t carries out batch mixing again.When briquetting, if there is the material that does not become material piece, can be returned to briquetting again, to improve yield rate.Briquetting specifically can adopt the briquetting apparatus such as ball press.
In order to understand better the present invention, further illustrate the present invention below in conjunction with embodiment.Wherein, unless otherwise noted, related per-cent is all weight percentage.
embodiment 1:
Be 32: 50: 12 in mass ratio by vanadium extraction one-time dedusting ash, vanadium extraction final dusting ash, hot rolling iron scale, bonding agent: 6 batching 5t, put into mixer mix and blend, in whipping process, evenly add 300kg water, after stirring, raw material being sent into ball press suppresses, do not become the raw material of piece to return in ball press hopper, the wet feed piece being pressed into transports by drying grate, in transportation, is dried with the hot blast of 200 DEG C.It is 93% that the vanadium-raising cooling agent finished product obtaining once becomes piece rate, and shape is even, intensity is better, from 2m high fall not broken; Wherein, TFe content is 61.39%, P content is 0.067%, S content is 0.06%, water content is 1.8%, meets the requirement as vanadium-raising cooling agent completely.
embodiment 2:
Be 10: 30: 52 in mass ratio by vanadium extraction one-time dedusting ash, vanadium extraction final dusting ash, hot rolling iron scale, bonding agent: 8 batching 10t, put into mixer mix and blend, in whipping process, evenly add 600kg water, after stirring, raw material being sent into ball press suppresses, do not become the raw material of piece to return in ball press hopper, the wet feed piece being pressed into transports by drying grate, in transportation, is dried with the hot blast of 200 DEG C.It is 92.4% that the vanadium-raising cooling agent finished product obtaining once becomes piece rate, and shape is even, intensity is better, from 2m high fall not broken; Wherein, TFe content is 60.00%, P content is 0.071%, S content is 0.08%, water content is 2.2%, meets the requirement as vanadium-raising cooling agent completely.
embodiment 3:
Be 20: 40: 33 in mass ratio by vanadium extraction one-time dedusting ash, vanadium extraction final dusting ash, hot rolling iron scale, bonding agent: 7 batching 15t, put into mixer mix and blend, in whipping process, evenly add 900kg water, after stirring, raw material being sent into ball press suppresses, do not become the raw material of piece to return in ball press hopper, the wet feed piece being pressed into transports by drying grate, in transportation, is dried with the hot blast of 200 DEG C.The balling ratio of vanadium-raising cooling agent finished product obtaining is 93%, and shape is even, intensity is better, from 2m high fall not broken; Wherein, TFe content is 60.85%, P content is 0.093%, S content is 0.06%, water content is 1.9%, meets the requirement as vanadium-raising cooling agent completely.
In sum, vanadium-raising cooling agent shape of the present invention is even, intensity is better, falls not brokenly from 2m is high, once becomes piece rate to reach more than 92%, and TFe content reached more than 60%, few containing compositions such as P, S, water, meets the requirement as vanadium-raising cooling agent completely.The dedusting ash not only can be completely vanadium extraction by converter blowing being produced effectively utilize, cost-saving, and can adapt to vanadium extraction by converter blowing production requirement completely, be conducive to the maximum using of vanadium resource.
Although specifically described vanadium-raising cooling agent of the present invention and preparation method thereof with reference to embodiments of the invention, but those skilled in the art will be appreciated that, without departing from the spirit and scope of the present invention, can make various forms of changes to embodiment.
Claims (7)
1. a vanadium-raising cooling agent, it is characterized in that, described vanadium-raising cooling agent comprises vanadium extraction dedusting ash, the iron scale of 12～33wt% and the bonding agent of 6～8wt% of 40～82wt%, wherein, described vanadium extraction dedusting ash comprises the vanadium extraction one-time dedusting ash of 10～32wt% and the vanadium extraction final dusting ash of 30～50wt%, described vanadium extraction one-time dedusting ash is the dust that dry-dedusting system EC and EP dust removal process produce, vanadium extraction final dusting ash is the EP dedusting dust that bag-type dust process produces afterwards, wherein, EC is flue-gas-cooling system, and EP is flue gas purification system.
2. vanadium-raising cooling agent according to claim 1, is characterized in that, TFe content > 62wt%, P content < 0.09wt%, S content < 0.06wt% in described vanadium extraction one-time dedusting ash; TFe content > 67wt%, P content < 0.06wt%, S content < 0.05wt% in described vanadium extraction final dusting ash.
3. vanadium-raising cooling agent according to claim 1, it is characterized in that, described iron scale is hot rolling iron scale, wherein, and TFe content > 65wt%, P content < 0.02wt%, S content < 0.03wt%.
4. vanadium-raising cooling agent according to claim 1, is characterized in that, described bonding agent is at least one in wilkinite, cement, diatomite.
5. a preparation method for the vanadium-raising cooling agent described in any one in claim 1 to 4, is characterized in that, described preparation method comprises the following steps:
By vanadium extraction dedusting ash, the iron scale of 12～52 parts and the bonding agent mixing of 6～8 parts of 40～82 parts are prepared burden by weight;
The material preparing is carried out to batch mixing, add water when batch mixing, the weight ratio of water and material is 3:50～5:50;
The material mixing is carried out to briquetting, after the material piece suppressing is dried, obtain described vanadium-raising cooling agent.
6. the preparation method of vanadium-raising cooling agent according to claim 5, is characterized in that, described vanadium extraction dedusting ash comprises by weight the vanadium extraction one-time dedusting ash of 10～32 parts and the vanadium extraction final dusting ash of 30～50 parts.
7. the preparation method of vanadium-raising cooling agent according to claim 5, is characterized in that, described preparation method also comprises the step that does not just become the material of material piece to return to again briquetting.
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| CN103205525B (en) * | 2013-04-15 | 2015-04-29 | 攀钢集团攀枝花钢铁研究院有限公司 | Furnace protective pellet for vanadium extracting converter and manufacturing method thereof |
| CN104017921B (en) * | 2014-06-24 | 2016-05-18 | 攀钢集团攀枝花钢铁研究院有限公司 | Vanadium-raising cooling agent and preparation method thereof |
| CN106755980A (en) * | 2016-12-14 | 2017-05-31 | 钢城集团凉山瑞海实业有限公司 | Coal-pressing ball and preparation method thereof |
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| CN101338351A (en) * | 2008-08-27 | 2009-01-07 | 攀钢集团研究院有限公司 | Vanadium-raising cooling agent, method for preparing same and use method |
| RU2008141025A (en) * | 2008-10-15 | 2010-04-20 | Открытое акционерное общество "Нижнетагильский металлургический комбинат" (ОАО "НТМК") (RU) | METHOD FOR PRODUCING VANADIUM SLAG AND VANADIUM-ALLOYED STEEL |
| RU2010100757A (en) * | 2010-01-11 | 2011-07-20 | Открытое акционерное общество "Нижнетагильский металлургический комбинат" (ОАО "НТМК") (RU) | METHOD FOR REMOVING VANADIUM AT THE CONVERTER TRANSFER OF NATURALLY-ALLOYED IRON |
| CN102251068A (en) * | 2011-07-08 | 2011-11-23 | 攀钢集团有限公司 | Vanadium-extracting cooling agent and preparation method thereof |
| CN102586538A (en) * | 2012-02-20 | 2012-07-18 | 攀钢集团攀枝花钢铁研究院有限公司 | Vanadium extraction coolant and preparation method thereof |
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| CN101338351A (en) * | 2008-08-27 | 2009-01-07 | 攀钢集团研究院有限公司 | Vanadium-raising cooling agent, method for preparing same and use method |
| RU2008141025A (en) * | 2008-10-15 | 2010-04-20 | Открытое акционерное общество "Нижнетагильский металлургический комбинат" (ОАО "НТМК") (RU) | METHOD FOR PRODUCING VANADIUM SLAG AND VANADIUM-ALLOYED STEEL |
| RU2010100757A (en) * | 2010-01-11 | 2011-07-20 | Открытое акционерное общество "Нижнетагильский металлургический комбинат" (ОАО "НТМК") (RU) | METHOD FOR REMOVING VANADIUM AT THE CONVERTER TRANSFER OF NATURALLY-ALLOYED IRON |
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