CN103131852A - Method for utilizing sludge containing vanadium and chromium - Google Patents
Method for utilizing sludge containing vanadium and chromium Download PDFInfo
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- CN103131852A CN103131852A CN2013100710167A CN201310071016A CN103131852A CN 103131852 A CN103131852 A CN 103131852A CN 2013100710167 A CN2013100710167 A CN 2013100710167A CN 201310071016 A CN201310071016 A CN 201310071016A CN 103131852 A CN103131852 A CN 103131852A
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Abstract
The invention discloses a method for utilizing sludge containing vanadium and chromium. The method disclosed by the invention comprises the following steps of: drying the sludge containing vanadium and chromium, then adding an organic binding agent and silicon carbide powder, processing to form balls, and then baking again to obtain mud balls containing vanadium and chromium; and returning the mud balls containing vanadium and chromium to a steelmaking LF (Ladle Furnace) refining process, reducing Cr and V elements of Cr2O3 and V2O5 oxides in the mud balls containing vanadium and chromium by utilizing an LF, and then microallying the mud balls containing vanadium and chromium in molten steel. According to the method, the sludge containing vanadium and chromium is dried and made into balls, so that the treatment cost is low; and the Cr and V elements are reduced and converted into steelmaking alloying beneficial elements in a steelmaking internal refining process and are microalloyed in the molten steel. The method disclosed by the invention is taken as a harmless treatment manner of the sludge containing vanadium and chromium, the sludge treatment cost is reduced, harm of heavy metal elements in discharged sludge to the environment is reduced, the method disclosed by the invention has the characteristics of good treatment effect, energy conservation, environmental friendliness and low cost, and can be used for fully utilizing alloy in the sludge containing vanadium and chromium, so that the effect of producing low alloy steel by microalloying is achieved.
Description
Technical field
The present invention relates to a kind for the treatment of technology of mud, the method for utilizing that contains vanadium chromium mud of especially a kind of vanadium chemical plant generation.
Background technology
At present, be generally take the smelting vanadium titano-magnetite as the main smelter technological process of production: blast furnace vanadium-bearing hot metal-vanadium extraction by converter blowing (obtains vanadium slag, vanadium slag send vanadium chemical plant production vanadium goods)-semi-steel making-liquid steel refining-continuous casting-steel rolling, find out from above-mentioned technical process, vanadium-bearing hot metal obtains intermediates vanadium slag and half steel after vanadium extraction by converter blowing, vanadium slag is for the production of the vanadium goods, and half steel continues the STEELMAKING PRODUCTION strand.The vanadium chemical plant utilizes vanadium slag to produce the vanadium goods such as vanadium iron, VN alloy, and what will produce in process of production certain amount contains vanadium chromium mud, and this mud is the waste of vanadium chemical plant generation, and its main component is: CaO＞4%, Cr
2O
3＞12%, V
2O
5＞15%, SiO
2＜30%, Na
2O＜9%, SO
3＜7%, Fe
2O
3＜15%, Cl＜4%.
Containing vanadium chromium mud and be a kind of is the reluctant solid hazardous waste that country generally acknowledges, environmental pollution is serious.pay much attention to the treatment process to it both at home and abroad, external main adopt the buried or thermal treatment of costly curing, domesticly be devoted to Resource analysis, resource technology with exploitation is useful on glass colorant at present, cement processed, brickmaking, produce fused(calcium magnesium)phosphate etc., although these methods have solved the idle problem of waste to a certain extent, but a lot of relevant technology also do not form throughput, majority method treatment effect is bad, also can cause the situations such as infiltration of heavy metal in refuse, cause secondary pollution, in addition, above-mentioned treatment process also needs to drop into a large amount of manpowers, material resources, financial resources are carried out deep processing, processing cost is higher.Therefore, for smelter, how to solve better the disposal and utilization problem that contains vanadium chromium mud, make it to form resource utilization, reducing as far as possible its pollution to environment is the current key issue that needs to be resolved hurrily.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of method of utilizing that contains vanadium chromium mud, to reduce the sludge treatment cost and to alleviate the harm that mud discharging heavy metal element wherein causes environment.
For solving the problems of the technologies described above, the technical solution used in the present invention is: add organic binder bond and silicon carbide powder after containing the oven dry of vanadium chromium mud, be processed to form spherical and again toast, obtain containing vanadium chromium mud ball; To contain vanadium chromium mud ball and return to the LF furnace refining procedure, and utilize the LF stove will contain Cr in vanadium chromium mud ball
2O
3, V
2O
5Enter molten steel after the Cr element of oxide compound, V element reduction and carry out microalloying.
The weight percent that contains composition in vanadium chromium mud ball of the present invention requires to be CaO 3～10%, Cr
2O
310～15%, V
2O
515～25%, SiO
2＜13%, P＜0.030%, S＜0.60%, moisture＜0.5%.Described organic binder bond be the 1～5wt% that contains vanadium chromium mud weight with addition of ratio, described silicon carbide powder be the 2～8wt% that contains vanadium chromium mud weight with addition of ratio.Described organic binder bond is the resol organic binder bond.
The ultimate compression strength that contains vanadium chromium mud ball of the present invention 〉=600N/ ball.
Microalloying process of the present invention is: add to contain vanadium chromium mud after LF stove slag color forms yellow, yellow-white or white slag, add simultaneously lime, calcium carbide, diffusion deoxidizer, add and proceed refining after containing vanadium chromium mud ball.
The add-on that contains vanadium chromium mud of the present invention is 2～5kg/ ton steel.The add-on of described lime is 2～5kg/ ton steel, and the calcium carbide add-on is 0.3～0.5kg/ ton steel, and the add-on of diffusion deoxidizer is 0.1～0.6kg/ ton steel.Described diffusion deoxidizer is ferrosilicon powder, silicon calcium powder or silico-calcium aluminium powder.
Of the present inventionly add that to contain the time of continuing refining after vanadium chromium mud ball be 5～8min.
The present invention is directed to the technical barrier that contains the harm that the high and mud discharging heavy metal element wherein of vanadium chromium sludge treatment cost causes environment, according to the characteristics that contain vanadium chromium mud, and then provide a kind of and directly return to the method that steel making working procedure utilizes after containing vanadium chromium mud processing treatment in STEELMAKING PRODUCTION, no longer leave unused and efflux or be transported to the upper deep processing of society and become various goods, formed and contained vanadium chromium mud in the inner directly new disposal and utilization method of recycle of smelter, will contain vanadium chromium mud ball Cr
2O
3, V
2O
5Be converted into steelmaking alloy element after the reduction of Cr element in oxide compound, V element and enter molten steel and carry out microalloying, form and contain vanadium chromium sewage sludge harmlessness processing mode, solve a prior art difficult problem.
The beneficial effect that adopts technique scheme to produce is: the inventive method will contain vanadium chromium mud oven dry ball processed, and processing cost is lower, will contain vanadium chromium mud ball Cr at the inner refining procedure of steel-making simultaneously
2O
3, V
2O
5Be converted into the steelmaking alloy beneficial element after the reduction of Cr element in oxide compound, V element and enter molten steel and carry out microalloying, formed and contain vanadium chromium mud in the inner directly new disposal and utilization method of recycle of smelter.The present invention is as containing vanadium chromium sewage sludge harmlessness processing mode, reduce the sludge treatment cost and alleviate the harm that mud discharging heavy metal element wherein causes environment, have that treatment effect is good, energy-conserving and environment-protective, characteristics that cost is low, and take full advantage of the alloy that contains in vanadium chromium mud, to reach the effect of microalloying production low alloy steel.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Fig. 1 is schematic flow sheet of the present invention.
Embodiment
shown in Figure 1, be generally take the smelting vanadium titano-magnetite as the main smelter technological process of production: blast furnace vanadium-bearing hot metal-vanadium extraction by converter blowing (obtains vanadium slag, vanadium slag send vanadium chemical plant production vanadium goods)-semi-steel making-liquid steel refining-continuous casting-steel rolling, originally the method for utilizing that contains vanadium chromium mud is: the terminal waste that the vanadium chemical plant produces contains vanadium chromium mud and no longer leave unused and effluxes or be transported to society and go up deep processing and become various goods, return to steel making working procedure after vanadium chromium mud is processed and utilize operation and increased to contain in technical process, form the bazardous waste method that direct circulation utilizes in factory.Concrete technology is: will contain vanadium chromium mud and collect, at first dry, mud after drying again adds resol organic binder bond and the 2～8wt% silicon carbide powder of 1～5wt%, be processed to form globe and again toast, what obtain ultimate compression strength 〉=600N/ ball contains vanadium chromium mud ball, the weight percent that contains the composition of vanadium chromium mud ball will reach following requirement: CaO 3～10%, Cr
2O
310～15%, V
2O
515～25%, SiO
2＜13%, P＜0.030%, S＜0.60%, moisture＜0.5%.Contain vanadium chromium mud ball prepare complete after, will contain vanadium chromium mud ball and return to the LF furnace refining procedure and utilize, utilize the LF stove will contain vanadium chromium mud ball Cr
2O
3, V
2O
5Enter molten steel after Cr element in oxide compound, V element reduction and carry out microalloying.Containing vanadium chromium mud ball increases vanadium at the LF stove, adds choose opportunities to add after LF stove slag color forms yellow, yellow-white or white slag when increasing Cr microalloying, add-on is 2～5kg/ ton steel, add the calcium carbide of the lime that adds simultaneously 2～5kg/ ton steel when containing vanadium chromium mud ball, 0.3～0.5kg/ ton steel, the diffusion deoxidizer of 0.1～0.6kg/ ton steel (the diffusion deoxidizer kind is wherein a kind of of ferrosilicon powder, silicon calcium powder, silico-calcium aluminium powder), and then carry out the refining process of 5～8min, reduction contains Cr, the V element in vanadium chromium mud ball.
Embodiment 1: the method for utilizing that originally contains vanadium chromium mud adopts following concrete processing step.
To contain vanadium chromium mud at first toast, mud after drying again adds resol organic binder bond and the 8wt% silicon carbide powder of 1wt%, be processed to form globe and again toast, what obtain ultimate compression strength 〉=600N/ ball contains vanadium chromium mud ball, the major ingredient weight percent that contains vanadium chromium mud ball is: CaO:3%, Cr
2O
3: 10%, V
2O
5: 25%, SiO
2＜13%, P＜0.030%, S＜0.60%, moisture＜0.5%.Contain vanadium chromium mud ball prepare complete after, to contain vanadium chromium mud ball returns to the LF furnace refining procedure and utilizes: contain vanadium chromium mud ball and increase vanadium at the LF stove, add choose opportunities to form in LF stove slag color when increasing Cr microalloying to add after yellow, add-on is 2kg/ ton steel, add the lime that adds simultaneously 2kg/ ton steel when containing vanadium chromium mud ball, the calcium carbide of 0.3kg/ ton steel, the silico-calcium aluminium powder diffusion deoxidizer of 0.1kg/ ton steel, and then carry out the refining process of 5min.Refining steel after the present embodiment refining increases vanadium 0.024wt% with adding to contain to compare before vanadium chromium mud ball, increases chromium 0.04wt%.
Embodiment 2: the method for utilizing that originally contains vanadium chromium mud adopts following concrete processing step.
To contain vanadium chromium mud at first toast, mud after toasting again adds resol organic binder bond and the 5wt% silicon carbide powder of 5wt%, be processed to form globe and again toast, what obtain ultimate compression strength 〉=600N/ ball contains vanadium chromium mud ball, the major ingredient weight percent that contains vanadium chromium mud ball is: CaO:10%, Cr
2O
3: 15%, V
2O
5: 15%, SiO
2＜13%, P＜0.030%, S＜0.60%, moisture＜0.5%.Contain vanadium chromium mud ball prepare complete after, to contain vanadium chromium mud ball returns to the LF furnace refining procedure and utilizes: contain vanadium chromium mud ball and increase vanadium at the LF stove, add choose opportunities to add after LF stove slag color forms yellow-white when increasing Cr microalloying, add-on is 5kg/ ton steel, add the lime that adds simultaneously 5kg/ ton steel when containing vanadium chromium mud ball, the calcium carbide of 0.5kg/ ton steel, the ferrosilicon powder diffusion deoxidizer of 0.6kg/ ton steel, and then carry out the refining process of 8min.Refining steel after the present embodiment refining increases vanadium 0.035wt% with adding to contain to compare before vanadium chromium mud ball, increases chromium 0.16wt%.
Embodiment 3: the method for utilizing that originally contains vanadium chromium mud adopts following concrete processing step.
To contain vanadium chromium mud at first toast, mud after toasting again adds resol organic binder bond and the 2wt% silicon carbide powder of 3wt%, be processed to form globe and again toast, what obtain ultimate compression strength 〉=600N/ ball contains vanadium chromium mud ball, the composition weight percent that contains vanadium chromium mud ball is: CaO:8%, Cr
2O
3: 12%, V
2O
5: 18%, SiO
2＜13%, P＜0.030%, S＜0.60%, moisture＜0.5%.Contain vanadium chromium mud ball prepare complete after, to contain vanadium chromium mud ball returns to the LF furnace refining procedure and utilizes: contain vanadium chromium mud ball and increase vanadium at the LF stove, add choose opportunities to add after LF stove slag color forms white when increasing Cr microalloying, add-on is 3kg/ ton steel, add the lime that adds simultaneously 4kg/ ton steel when containing vanadium chromium mud ball, the calcium carbide of 0.4kg/ ton steel, the silicon calcium powder diffusion deoxidizer of 0.3kg/ ton steel, and then carry out the refining process of 7min.Refining steel after the present embodiment refining increases vanadium 0.026wt% with adding to contain to compare before vanadium chromium mud ball, increases chromium 0.10wt%.
Claims (10)
1. the method for utilizing that contains vanadium chromium mud, is characterized in that: add organic binder bond and silicon carbide powder after containing the oven dry of vanadium chromium mud, be processed to form spherical and again toast, obtain containing vanadium chromium mud ball; To contain vanadium chromium mud ball and return to the LF furnace refining procedure, and utilize the LF stove will contain Cr in vanadium chromium mud ball
2O
3, V
2O
5Enter molten steel after the Cr element of oxide compound, V element reduction and carry out microalloying.
2. the method for utilizing that contains vanadium chromium mud according to claim 1, is characterized in that, the described weight percent that contains composition in vanadium chromium mud ball requires to be CaO 3～10%, Cr
2O
310～15%, V
2O
515～25%, SiO
2＜13%, P＜0.030%, S＜0.60%, moisture＜0.5%.
3. the method for utilizing that contains vanadium chromium mud according to claim 2 is characterized in that: described organic binder bond be the 1～5wt% that contains vanadium chromium mud weight with addition of ratio, described silicon carbide powder be the 2～8wt% that contains vanadium chromium mud weight with addition of ratio.
4. according to claim 1,2 or 3 described methods of utilizing that contain vanadium chromium mud, it is characterized in that: described organic binder bond is the resol organic binder bond.
5. according to claim 1,2 or 3 described methods of utilizing that contain vanadium chromium mud is characterized in that: the described ultimate compression strength that contains vanadium chromium mud ball 〉=600N/ ball.
6. the method for utilizing that contains vanadium chromium mud according to claim 1, it is characterized in that, described microalloying process is: add to contain vanadium chromium mud after LF stove slag color forms yellow, yellow-white or white slag, add simultaneously lime, calcium carbide, diffusion deoxidizer, add and proceed refining after containing vanadium chromium mud ball.
7. the method for utilizing that contains vanadium chromium mud according to claim 6, it is characterized in that: the described add-on that contains vanadium chromium mud is 2～5kg/ ton steel.
8. according to claim 6 or 7 described methods of utilizing that contain vanadium chromium mud, it is characterized in that: the add-on of described lime is 2～5kg/ ton steel, and the calcium carbide add-on is 0.3～0.5kg/ ton steel, and the add-on of diffusion deoxidizer is 0.1～0.6kg/ ton steel.
9. the method for utilizing that contains vanadium chromium mud according to claim 8, it is characterized in that: described diffusion deoxidizer is ferrosilicon powder, silicon calcium powder or silico-calcium aluminium powder.
10. the method for utilizing that contains vanadium chromium mud according to claim 6 is characterized in that: describedly add that to contain the time of continuing refining after vanadium chromium mud ball be 5～8min.
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| CN201310071016.7A CN103131852B (en) | 2013-03-06 | 2013-03-06 | Method for utilizing sludge containing vanadium and chromium |
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|---|---|---|---|
| CN201310071016.7A CN103131852B (en) | 2013-03-06 | 2013-03-06 | Method for utilizing sludge containing vanadium and chromium |
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| CN103131852B CN103131852B (en) | 2014-07-02 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104611513A (en) * | 2015-02-03 | 2015-05-13 | 河北钢铁股份有限公司承德分公司 | Method for utilizing vanadium in steel slag |
| CN107586912A (en) * | 2017-09-19 | 2018-01-16 | 马鞍山钢铁股份有限公司 | A kind of V2O5The method of direct Reducing and Alloying |
| CN111235350A (en) * | 2019-11-20 | 2020-06-05 | 首钢水城钢铁（集团）有限责任公司 | Strengthening method for adding vanadium-titanium balls in construction steel bar smelting process |
| CN113930662A (en) * | 2021-09-24 | 2022-01-14 | 河钢承德钒钛新材料有限公司 | Preparation method of chromium nitride ferrovanadium alloy |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251114A (en) * | 2011-07-08 | 2011-11-23 | 甘肃锦世化工有限责任公司 | Method for smelting chromium-containing cast iron by using vanadium-containing calcium slag |
-
2013
- 2013-03-06 CN CN201310071016.7A patent/CN103131852B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251114A (en) * | 2011-07-08 | 2011-11-23 | 甘肃锦世化工有限责任公司 | Method for smelting chromium-containing cast iron by using vanadium-containing calcium slag |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104611513A (en) * | 2015-02-03 | 2015-05-13 | 河北钢铁股份有限公司承德分公司 | Method for utilizing vanadium in steel slag |
| CN107586912A (en) * | 2017-09-19 | 2018-01-16 | 马鞍山钢铁股份有限公司 | A kind of V2O5The method of direct Reducing and Alloying |
| CN107586912B (en) * | 2017-09-19 | 2019-07-02 | 马鞍山钢铁股份有限公司 | A kind of V2O5The method of direct Reducing and Alloying |
| CN111235350A (en) * | 2019-11-20 | 2020-06-05 | 首钢水城钢铁（集团）有限责任公司 | Strengthening method for adding vanadium-titanium balls in construction steel bar smelting process |
| CN111235350B (en) * | 2019-11-20 | 2021-09-17 | 首钢水城钢铁（集团）有限责任公司 | Strengthening method for adding vanadium-titanium balls in construction steel bar smelting process |
| CN113930662A (en) * | 2021-09-24 | 2022-01-14 | 河钢承德钒钛新材料有限公司 | Preparation method of chromium nitride ferrovanadium alloy |
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| CN103131852B (en) | 2014-07-02 |
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