CN102864270A - Vanadium extraction cooling agent and preparation method thereof - Google Patents
Vanadium extraction cooling agent and preparation method thereof Download PDFInfo
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- CN102864270A CN102864270A CN2012103425610A CN201210342561A CN102864270A CN 102864270 A CN102864270 A CN 102864270A CN 2012103425610 A CN2012103425610 A CN 2012103425610A CN 201210342561 A CN201210342561 A CN 201210342561A CN 102864270 A CN102864270 A CN 102864270A
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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 take the vanadium extraction dedusting ash as raw material and preparation method thereof.
Background technology
China is vanadium titano-magnetite big country, and vanadium titano-magnetite is compared with common molten iron by the molten iron that blast-furnace smelting goes out, and its content of vanadium is high, and vanadium is a kind of important resource, so must vanadium extraction before the molten iron-steelmaking and produce 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 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, optimum with vanadium extraction by converter blowing technique, technico-economical comparison is best.
At present, the production technique of vanadium extraction by converter blowing mainly realizes by adding refrigerant, control process temperature and duration of blast both at home and abroad.Vanadium extraction from hot metal is a selective oxidation technology, and the Converter Oxigen Blowing vanadium extraction is an exothermic process, the element oxidation meetings such as Si, Mn, V, C are rapidly heated the molten bath, and the oxidation of Si, Mn occurs in before the V oxidation, and 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 the carbon vanadium invert point, reach the purpose that carbon is protected in vanadium extraction, V content is down to below the 0.05wt%.In addition, the waste gas that produces in the vanadium extraction from hot metal process generally adopts dry method dust to process, and dry method dust can produce a large amount of solid waste---dedusting ash when the process of processing, and the 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 mainly is to add refrigerant in molten iron, and the refrigerant of commonly using at present is just like common iron ore, cooled agglomerated pellet, steel scrap, iron scale and high-grade ore etc.Climbing the factory owner 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%, wedding agent 5～10wt%, this refrigerant can increase extraction yield and the v slag grade of vanadium, stablizes the 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 take iron scale or vanadium extraction mud, contain vanadium iron concentrate, wedding agent as raw material production, contain the ferriferous oxide of 80～95wt%, the SiO of 3～6wt%
2, 0.1～0.6wt% V
2O
5, 1～3wt%MgCl
2Publication 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 caking agent production, 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 the vanadium extraction by converter blowing production process produces, provide a kind of take the vanadium extraction dedusting ash as raw material vanadium-raising cooling agent and preparation method thereof, realize the utilization maximization of resource.
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 the vanadium extraction dedusting ash of 40～82wt%, the iron scale of 12～52wt% and the wedding agent of 6～8wt%.
According to an embodiment of vanadium-raising cooling agent of the present invention, 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 an embodiment of vanadium-raising cooling agent of the present invention, TFe content＞62wt%, P content＜0.09wt%, S content＜0.06wt% in the described vanadium extraction one-time dedusting ash; TFe content＞67wt%, P content＜0.06wt%, S content＜0.05wt% in the described vanadium extraction final dusting ash.
According to an embodiment of vanadium-raising cooling agent of the present invention, described iron scale is hot rolling iron scale, wherein, and TFe content＞65wt%, P content＜0.02wt%, S content＜0.03wt%.
According to an embodiment of vanadium-raising cooling agent of the present invention, described wedding agent is at least a in wilkinite, cement, the diatomite.
Another aspect of the present invention provides a kind of preparation method of above-mentioned vanadium-raising cooling agent, and described preparation method may further comprise the steps:
With 40～82 parts vanadium extraction dedusting ash, 12～52 parts iron scale and 6～8 parts wedding agent mixing are prepared burden by weight;
The material for preparing is carried out batch mixing, add entry in the time of batch mixing, the weight ratio of water and material is 3: 50～5: 50;
The material of mixing is carried out briquetting, will namely get described vanadium-raising cooling agent after the material piece drying that suppress.
According to the preparation method's of a vanadium-raising cooling agent of the present invention embodiment, described vanadium extraction dedusting ash comprises that by weight the vanadium extraction final dustings of 10～32 parts vanadium extraction one-time dedusting ash and 30～50 parts are grey.
According to the preparation method's of a vanadium-raising cooling agent of the present invention embodiment, described preparation method comprises that also the material that just becomes the material piece returns again the step of 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.Cost is effectively utilized, saved to the dedusting ash that not only can fully vanadium extraction by converter blowing be produced, and can adapt to the vanadium extraction by converter blowing production requirement fully, is conducive to the maximum using of vanadium resource, is enterprise's create beneficial result.
Embodiment
The below will describe vanadium-raising cooling agent according to the embodiment of the invention and preparation method thereof in detail.
Vanadium-raising cooling agent according to the present invention comprises the vanadium extraction dedusting ash of 40～82wt%, the iron scale of 12～52wt% and the wedding agent of 6～8wt%.
The dust that vanadium extraction dedusting ash of the present invention obtains when referring to adopt dry-dedusting system that flue gas is processed in the vanadium extraction by converter blowing production, its composition is mainly TFe, the CaO about 5wt%, the TiO about 10wt% about 65wt%
2, the MgO about 10wt% and the Al of surplus
2O
3Deng.Adopt the vanadium extraction dedusting ash to be as the benefit of refrigerant, TFe content wherein is high, CaO content is low, is conducive to the control of vanadium slag quality.
In one exemplary embodiment of the present invention, the 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 dust of afterwards bag-type dust process generation of EP dedusting, and wherein, EC is flue-gas-cooling system, and EP is flue gas purification system or is called the flue gas electrostatic precipitation system.According to the present invention, TFe content＞62wt%, P content＜0.09wt%, S content＜0.06wt% in the vanadium extraction one-time dedusting ash; TFe content＞67wt%, P content＜0.06wt%, S content＜0.05wt% in the vanadium extraction final dusting ash.
Iron scale of the present invention is the oxide shell that produces in 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 the casting process.The ferric oxide micromicro improves slag fluidity, also is 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, and select hot rolling iron scale mainly to be based on the larger reason of its stock number.
Particularly, the wedding agent that adopts in the vanadium-raising cooling agent of the present invention is at least a in wilkinite, cement, the 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 may further comprise the steps: 40～82 parts vanadium extraction dedusting ash, 12～52 parts iron scale and 6～8 parts wedding agent mixing are prepared burden by weight; The material for preparing is carried out batch mixing, add entry in the time of batch mixing, the weight ratio of water and material is 3: 50～5: 50; The material of mixing is carried out briquetting, will namely get described vanadium-raising cooling agent after the material piece drying that suppress.Wherein, the ratio of each composition has considered that mainly cooling performance and result of use arrange in the vanadium-raising cooling agent, because the granularity of vanadium extraction dedusting ash is little, if the too much or very few piece rate that all will affect into of the ratio of vanadium extraction dedusting ash, and the ratio of iron scale also must be suitable, otherwise the TFe content in the vanadium-raising cooling agent behind the briquetting is higher, and meeting in vanadium extracting process is so that the TFe content in the vanadium slag is also higher.
Add a certain amount of water during batch mixing and carry out moisteningly, vanadium extraction dedusting ash, iron scale are combined better with wedding 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 commonly used such as mixer, stirrer.
In addition, mainly be because the material piece is beneficial to blanking with being pressed into the material piece after the mixing of vanadium-raising cooling agent raw material, and can improve the utilization ratio of material.If but the moisture in the material piece is excessive, therefore the dangerous phenomenon of large spray in the possible producer should will re-use after the material piece drying as far as possible.For example, enter in the iron railings hopper natural air drying two days with the wet feed that suppresses is packaged; Perhaps, with the wet feed piece that the suppresses warm air drying through 200 ℃.
During batching, the material that can prepare as required gross weight and be 5～15t carries out batch mixing again.During briquetting, if the material that does not become the material piece is arranged, it can be returned again briquetting, to improve yield rate.Briquetting specifically can adopt the briquetting apparatus such as ball press.
In order to understand better the present invention, further specify the present invention below in conjunction with embodiment.Wherein, unless otherwise noted, related per-cent all is weight percentage.
Embodiment 1:
Be 32: 50: 12 in mass ratio with vanadium extraction one-time dedusting ash, vanadium extraction final dusting ash, hot rolling iron scale, wedding agent: 6 batching 5t, put into the mixer mix and blend, evenly add 300kg water in the whipping process, after stirring raw material being sent into ball press suppresses, do not become the raw material of piece to return in the ball press hopper, the wet feed piece that is pressed into transports by drying grate, and the hot blast with 200 ℃ in the transportation carries out drying.It is 93% that the vanadium-raising cooling agent finished product that obtains once becomes the 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%, satisfies the requirement as vanadium-raising cooling agent fully.
Embodiment 2:
Be 10: 30: 52 in mass ratio with vanadium extraction one-time dedusting ash, vanadium extraction final dusting ash, hot rolling iron scale, wedding agent: 8 batching 10t, put into the mixer mix and blend, evenly add 600kg water in the whipping process, after stirring raw material being sent into ball press suppresses, do not become the raw material of piece to return in the ball press hopper, the wet feed piece that is pressed into transports by drying grate, and the hot blast with 200 ℃ in the transportation carries out drying.It is 92.4% that the vanadium-raising cooling agent finished product that obtains once becomes the 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%, satisfies the requirement as vanadium-raising cooling agent fully.
Embodiment 3:
Be 20: 40: 33 in mass ratio with vanadium extraction one-time dedusting ash, vanadium extraction final dusting ash, hot rolling iron scale, wedding agent: 7 batching 15t, put into the mixer mix and blend, evenly add 900kg water in the whipping process, after stirring raw material being sent into ball press suppresses, do not become the raw material of piece to return in the ball press hopper, the wet feed piece that is pressed into transports by drying grate, and the hot blast with 200 ℃ in the transportation carries out drying.Balling ratio of the vanadium-raising cooling agent finished product that obtains 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%, satisfies the requirement as vanadium-raising cooling agent fully.
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 the piece rate to reach more than 92%, and TFe content reached more than 60%, contains the compositions such as P, S, water few, satisfies the requirement as vanadium-raising cooling agent fully.Cost is effectively utilized, saved to the dedusting ash that not only can fully vanadium extraction by converter blowing be produced, and can adapt to the vanadium extraction by converter blowing production requirement fully, is 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, in the situation that do not break away from the spirit and scope of the present invention, can make various forms of changes to embodiment.
Claims (8)
1. a vanadium-raising cooling agent is characterized in that, described vanadium-raising cooling agent comprises the vanadium extraction dedusting ash of 40～82wt%, the iron scale of 12～52wt% and the wedding agent of 6～8wt%.
2. vanadium-raising cooling agent according to claim 1 is characterized in that, 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%.
3. vanadium-raising cooling agent according to claim 2 is characterized in that, TFe content＞62wt%, P content＜0.09wt%, S content＜0.06wt% in the described vanadium extraction one-time dedusting ash; TFe content＞67wt%, P content＜0.06wt%, S content＜0.05wt% in the described vanadium extraction final dusting ash.
4. vanadium-raising cooling agent according to claim 1 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%.
5. vanadium-raising cooling agent according to claim 1 is characterized in that, described wedding agent is at least a in wilkinite, cement, the diatomite.
6. the preparation method of each described vanadium-raising cooling agent in the claim 1 to 5 is characterized in that, described preparation method may further comprise the steps:
With 40～82 parts vanadium extraction dedusting ash, 12～52 parts iron scale and 6～8 parts wedding agent mixing are prepared burden by weight;
The material for preparing is carried out batch mixing, add entry in the time of batch mixing, the weight ratio of water and material is 3: 50～5: 50;
The material of mixing is carried out briquetting, will namely get described vanadium-raising cooling agent after the material piece drying that suppress.
7. the preparation method of vanadium-raising cooling agent according to claim 6 is characterized in that, described vanadium extraction dedusting ash comprises that by weight the vanadium extraction final dustings of 10～32 parts vanadium extraction one-time dedusting ash and 30～50 parts are grey.
8. the preparation method of vanadium-raising cooling agent according to claim 6 is characterized in that, described preparation method comprises that also the material that does not just become the material piece returns again the step of briquetting.
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| CN103205525A (en) * | 2013-04-15 | 2013-07-17 | 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 |
| CN104017921A (en) * | 2014-06-24 | 2014-09-03 | 攀钢集团攀枝花钢铁研究院有限公司 | Vanadium extraction coolant 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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| 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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