CN106755698A - A kind of application process of Iron concentrate - Google Patents
A kind of application process of Iron concentrate Download PDFInfo
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- CN106755698A CN106755698A CN201510832069.5A CN201510832069A CN106755698A CN 106755698 A CN106755698 A CN 106755698A CN 201510832069 A CN201510832069 A CN 201510832069A CN 106755698 A CN106755698 A CN 106755698A
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Abstract
A kind of application process of Iron concentrate, comprises the following steps：（1）Ball milling, the impurity of floating is removed by upper step by the Iron concentrate of ball-milling treatment through over cleaning；Magnetic separation will be carried out by magnetic separator by the Iron concentrate for once cleaning；Drying, above-mentioned smart iron powder is dried；（2）The mixture of magnesia and magnesium carbonate is added in smart iron powder after drying, add polyacrylamide, sodium humate, nitrate or chlorate or perchlorate mixture, one or both of Corn Starch Blends, polyacrylamide aluminate mixture are combined, and obtain mixture；（3）Pig is heated on the intermediate frequency furnace for possessing bottom blowing function, after the pig iron is fused into molten iron, it is 1360-1520 DEG C that regulation insulation power keeps molten iron temperature, carries out bottom blowing, is subsequently adding step（2）Mixture react.The present invention improves the quality of final products.
Description
Technical field
The invention belongs to chemical technology field, a kind of application process of Iron concentrate is specifically referred to.
Background technology
At present, metallurgical briquetting has become one of main feed stock for blast furnace of steel industry, pellet quality and the Main Bottleneck that pellet cost is also cost declining before iron.The binding agent mainly bentonite that current pelletizing industry is used, because bentonitic high-temperature residual causes just to be reduction of the Iron grade of feed stock for blast furnace using bentonitic direct result and increased silicone content, this point is unfavorable to steel industry.Think that every raising one enters stove Iron grade when not increasing input substantially in industry, iron per ton will be brought to save 2% coke, have more the huge economic benefit and social benefit of 3% product iron.Therefore the use of the organic binder bond pelletizing of energy scaling loss has been pelletizing industry and one of steel industry energy-conservation, low-carbon (LC), emission reduction, the maximally effective approach of synergy.Pellet binder should meet following primary condition（1）：Consumption is few or scaling loss big, and ball-formation quality is good, and institute can meet into green pellets transports and requirement of the pelletizing in drying grate technologic, such as：Drop strength, burst temperature；（2）：Green pellets is by that can obtain enough intensity after drying grate.In binding agent application aspect, the special organic binder bond of many pelletizings has been have developed both at home and abroad, such as：But the pendant benefit of Dutch Akzo Nobel N.V. production, the Acker Thailand series of products of Ciba of Switzerland production all industrially obtained preferable application foreign countries pelletizing be calcined as taped based on to preheated pellets intensity without particular/special requirement, and China then has intensity requirement higher otherwise preheated pellets to cannot stand into impact during rotary kiln and the friction in rotary kiln preheated pellets based on grate kiln, cause dust in kiln excessive and then ring formation can not be produced normally, external product is in China and does not apply to.Domestic research mainly has two aspects, on the one hand it is using compound mode, can so be improved preheated pellets intensity and be met basic demand of the rotary kiln to pelletizing, such as Chinese patent " a kind of for the binding agent usage of iron ore pellets and preparation " by organic adhesive and bentonite compounding（CN1814825A）, " a kind of bonding agent for iron ore pellet and preparation method thereof "（ZL200710304318.9）, " composite globular mineral binder and its process "（CN1229144）" a kind of Iron Ore Powder prepares binding agent of iron powder ball and preparation method thereof（ZL200510134759.X）Deng, but this mode necessarily introduces part bentonite and reduces the Iron grade of pelletizing and increased unwanted silicone content, and not nothing truly makes ball with local methods；On the other hand it is using pure organic matter binding agent, such as Chinese patent " a kind of Cheap highly effective binder of pellet and preparation method thereof " (CN101230416A), " a kind of for the binding agent usage of iron ore pellets and preparation "（CN1814825A）, " a kind of multiple poly- sections ore pellet organic binder and its application method "（101693950A）, document " adhesive property of the natural organic high-molecular binding agent in iron ore agglomeration ", " experimental study of iron ore pellets compound binding agent ", but document " organic binder bond prepares acid pellet instead of bentonite ", the measure of organic binder bond oxide pellet intensity " improve " " organic binder bond acid pellet consolidation characteristics and enhancements " explicitly point out without after native balling-up due to lacking the liquid phase tissue of low melting point formation inside pelletizing, di-iron trioxide whisker is grown up, and diffusion is relatively slow so that green pellets is difficult to meet subsequent technique requirement by intensity of the drying grate as preheated pellets, substantial amounts of laboratory and industrial experiment also demonstrate that this point, thus pure organic binder bond does not obtain actually used industrially yet.Produce above mentioned problem the reason for be：（1）Current organic binder bond is mainly water soluble polymer, into high-viscous liquid after chance water, and bentonite is water-insoluble, the two balling-up mechanism is incomplete same, bentonite balling-up with stratiform parcel grow up based on, pelletizing operation is easy, and institute is closely knit into pelletizing, and this point is grown up to follow-up di-iron trioxide whisker, and to improve pellet strength highly beneficial for bridging；Water soluble polymer balling-up is to wrap up and reunion has concurrently, solution viscosity agglomeration higher that the pelletizing more difficult and polymer substance of operation is formed is bigger, institute of reuniting grows up into pelletizing packing into the packing of pelletizing far below stratiform parcel, and whisker bridging effect is weaker.（2）Low-temperature zone of the bentonite in drying grate can be formed liquid phase be conducive to whisker grow up and spread make pelletizing crystal inside particle between be more likely formed bridging and bentonitic residue has also filled up the space inside pelletizing.（3）Green pellets preheating time on drying grate is not long enough, drying grate temperature nor sufficiently high so that pelletizing internal oxidation iron recrystallization degree is inadequate.
Therefore, necessary a kind of application process of Iron concentrate of design.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of application process of Iron concentrate.
Present disclosure includes：
A kind of application process of Iron concentrate, comprises the following steps：
（1）Iron concentrate raw material are carried out ball-milling treatment by ball milling by ball mill so that Iron concentrate is integrally presented uniform pulverulence, the impurity of the larger particles inside removing；Upper step is removed into the impurity of floating by the Iron concentrate of ball-milling treatment through over cleaning；Magnetic separation will be carried out by magnetic separator by the Iron concentrate for once cleaning, remove non iron impurity, obtain Iron concentrate；Drying, above-mentioned smart iron powder is dried；
（2）The mixture of magnesia and magnesium carbonate is added in smart iron powder after drying, add polyacrylamide, sodium humate, nitrate or chlorate or perchlorate mixture, one or both of Corn Starch Blends, polyacrylamide aluminate mixture are combined, and obtain mixture；
（3）Pig is heated on the intermediate frequency furnace for possessing bottom blowing function, after the pig iron is fused into molten iron, it is 1360-1520 DEG C that regulation insulation power keeps molten iron temperature, carries out bottom blowing, is subsequently adding step（2）Mixture react.
In the present invention, as a kind of perferred technical scheme, step（1）In, by the powder of Iron concentrate grinding raw material to 300-400 mesh during ball-milling treatment.
In the present invention, as a kind of perferred technical scheme, step（2）In, the mass ratio of magnesia and magnesium carbonate is 3-5：2.
In the present invention, as a kind of perferred technical scheme, step（3）In, intermediate frequency furnace is that capacity is the intermediate frequency furnace of 500kg.
In the present invention, as a kind of perferred technical scheme, step（3）In, the cavity volume of intermediate frequency furnace is 0.07m3, heating power is 250kw, and programming rate is 10 DEG C/min, and nitrogen bottom blowing flow is 0.05-0.10m3/（min.t）.
The beneficial effects of the invention are as follows,
The present invention effectively can remove the undesired impurities in pig iron ore deposit, improve the quality of final products.
Specific embodiment
In order that technological means, creation characteristic, reached purpose and effect that the present invention is realized are easy to understand, with reference to specific embodiment, the present invention is expanded on further.
Embodiment 1
A kind of application process of Iron concentrate, comprises the following steps：
（1）Iron concentrate raw material by the powder of Iron concentrate grinding raw material to 400 mesh during ball-milling treatment, are carried out ball-milling treatment so that Iron concentrate is integrally presented uniform pulverulence, the impurity of the larger particles inside removing by ball milling by ball mill；Upper step is removed into the impurity of floating by the Iron concentrate of ball-milling treatment through over cleaning；Magnetic separation will be carried out by magnetic separator by the Iron concentrate for once cleaning, remove non iron impurity, obtain Iron concentrate；Drying, above-mentioned smart iron powder is dried；
（2）The mass ratio of the mixture of addition magnesia and magnesium carbonate in the smart iron powder after drying, magnesia and magnesium carbonate is 5：2., polyacrylamide is added, obtain mixture；
（3）Pig is heated on the intermediate frequency furnace for possessing bottom blowing function, after the pig iron is fused into molten iron, it is 1520 DEG C that regulation insulation power keeps molten iron temperature, carries out bottom blowing, is subsequently adding step（2）Mixture react, intermediate frequency furnace be capacity for 500kg intermediate frequency furnace.The cavity volume of intermediate frequency furnace is 0.07m3, heating power is 250kw, and programming rate is 10 DEG C/min, and nitrogen bottom blowing flow is 0.10m3/（min.t）.
Embodiment 1
A kind of application process of Iron concentrate, comprises the following steps：
（1）Iron concentrate raw material by the powder of Iron concentrate grinding raw material to 300 mesh during ball-milling treatment, are carried out ball-milling treatment so that Iron concentrate is integrally presented uniform pulverulence, the impurity of the larger particles inside removing by ball milling by ball mill；Upper step is removed into the impurity of floating by the Iron concentrate of ball-milling treatment through over cleaning；Magnetic separation will be carried out by magnetic separator by the Iron concentrate for once cleaning, remove non iron impurity, obtain Iron concentrate；Drying, above-mentioned smart iron powder is dried；
（2）The mass ratio of the mixture of addition magnesia and magnesium carbonate in the smart iron powder after drying, magnesia and magnesium carbonate is 3：2., Corn Starch Blends, the combination of polyacrylamide aluminate mixture are added, obtain mixture；
（3）Pig is heated on the intermediate frequency furnace for possessing bottom blowing function, after the pig iron is fused into molten iron, it is 1360 DEG C that regulation insulation power keeps molten iron temperature, carries out bottom blowing, is subsequently adding step（2）Mixture react, intermediate frequency furnace be capacity for 500kg intermediate frequency furnace.The cavity volume of intermediate frequency furnace is 0.07m3, heating power is 250kw, and programming rate is 10 DEG C/min, and nitrogen bottom blowing flow is 0.05m3/（min.t）.
Embodiment 3
A kind of application process of Iron concentrate, comprises the following steps：
（1）Iron concentrate raw material by the powder of Iron concentrate grinding raw material to 350 mesh during ball-milling treatment, are carried out ball-milling treatment so that Iron concentrate is integrally presented uniform pulverulence, the impurity of the larger particles inside removing by ball milling by ball mill；Upper step is removed into the impurity of floating by the Iron concentrate of ball-milling treatment through over cleaning；Magnetic separation will be carried out by magnetic separator by the Iron concentrate for once cleaning, remove non iron impurity, obtain Iron concentrate；Drying, above-mentioned smart iron powder is dried；
（2）The mass ratio of the mixture of addition magnesia and magnesium carbonate in the smart iron powder after drying, magnesia and magnesium carbonate is 4：2., polyacrylamide is added, sodium humate combination obtains mixture；
（3）Pig is heated on the intermediate frequency furnace for possessing bottom blowing function, after the pig iron is fused into molten iron, it is 1420 DEG C that regulation insulation power keeps molten iron temperature, carries out bottom blowing, is subsequently adding step（2）Mixture react, intermediate frequency furnace be capacity for 500kg intermediate frequency furnace.The cavity volume of intermediate frequency furnace is 0.07m3, heating power is 250kw, and programming rate is 10 DEG C/min, and nitrogen bottom blowing flow is 0.08m3/（min.t）.
The properties of product of embodiment 1-3 productions are as follows：
| Project | C content | Si contents | Ti contents | P content |
| Embodiment 1 | 3.96 | 0.54 | 0.048 | 0.112 |
| Embodiment 2 | 3.95 | 0.48 | 0.03 | 0.1 |
| Embodiment 3 | 4.02 | 0.31 | 0.025 | 0.09 |
Those of ordinary skill in the art should be understood：The discussion of any of the above embodiment is exemplary only, it is not intended that imply that the scope of the present disclosure (including claim) is limited to these examples；Under thinking of the invention, can also be combined between technical characteristic in above example or different embodiments, step can be realized with random order, and there are many other changes of different aspect of the invention as described above, and for simplicity, they are provided not in details.Therefore, all any omission, modification, equivalent, improvement within the spirit and principles in the present invention, made etc., should be included within the scope of the present invention.
Claims (5)
1. a kind of application process of Iron concentrate, it is characterized in that, comprise the following steps：
（1）Iron concentrate raw material are carried out ball-milling treatment by ball milling by ball mill so that Iron concentrate is integrally presented uniform pulverulence, the impurity of the larger particles inside removing；Upper step is removed into the impurity of floating by the Iron concentrate of ball-milling treatment through over cleaning；Magnetic separation will be carried out by magnetic separator by the Iron concentrate for once cleaning, remove non iron
Impurity, obtains Iron concentrate；Drying, above-mentioned smart iron powder is dried；
（2）The mixture of magnesia and magnesium carbonate is added in smart iron powder after drying, add polyacrylamide, sodium humate, nitrate or chlorate or perchlorate mixture, one or both of Corn Starch Blends, polyacrylamide aluminate mixture are combined, and obtain mixture；
（3）Pig is heated on the intermediate frequency furnace for possessing bottom blowing function, after the pig iron is fused into molten iron, it is 1360-1520 DEG C that regulation insulation power keeps molten iron temperature, carries out bottom blowing, is subsequently adding step（2）Mixture react.
2. a kind of application process of Iron concentrate as claimed in claim 1, it is characterized in that, step（1）In, by the powder of Iron concentrate grinding raw material to 300-400 mesh during ball-milling treatment.
3. a kind of application process of Iron concentrate as claimed in claim 1, it is characterized in that, step（2）In, the mass ratio of magnesia and magnesium carbonate is 3-5：2.
4. a kind of application process of Iron concentrate as claimed in claim 1, it is characterized in that, step（3）In, intermediate frequency furnace is that capacity is the intermediate frequency furnace of 500kg.
5. a kind of application process of Iron concentrate as claimed in claim 1, it is characterized in that, step（3）In, the cavity volume of intermediate frequency furnace is 0.07m3, heating power is 250kw, and programming rate is 10 DEG C/min, and nitrogen bottom blowing flow is 0.05-0.10m3/（min.t）.
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| CN201510832069.5A CN106755698A (en) | 2015-11-25 | 2015-11-25 | A kind of application process of Iron concentrate |
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| CN201510832069.5A CN106755698A (en) | 2015-11-25 | 2015-11-25 | A kind of application process of Iron concentrate |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1343626A (en) * | 2000-09-19 | 2002-04-10 | 张美焦 | Industrial process for preparing high-purity super-fine magnetite powder |
| CN102094117A (en) * | 2011-01-20 | 2011-06-15 | 嵇建国 | Binder, preparation method of binder and application of binder used as metallurgical pellet binder |
| CN102140575A (en) * | 2011-02-17 | 2011-08-03 | 中国工业投资（国际）有限公司 | Novel metallurgy and casting integration method |
| CN102373332A (en) * | 2010-08-17 | 2012-03-14 | 上海汉堂实业有限公司 | Ultra-micro magnesium carbonate pellet additive, preparation method thereof, and application thereof |
| CN104498708A (en) * | 2014-12-09 | 2015-04-08 | 攀枝花环业冶金渣开发有限责任公司 | Pellets prepared from blast furnace slag iron fine powder as well as preparation method and application of pellets |
-
2015
- 2015-11-25 CN CN201510832069.5A patent/CN106755698A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1343626A (en) * | 2000-09-19 | 2002-04-10 | 张美焦 | Industrial process for preparing high-purity super-fine magnetite powder |
| CN102373332A (en) * | 2010-08-17 | 2012-03-14 | 上海汉堂实业有限公司 | Ultra-micro magnesium carbonate pellet additive, preparation method thereof, and application thereof |
| CN102094117A (en) * | 2011-01-20 | 2011-06-15 | 嵇建国 | Binder, preparation method of binder and application of binder used as metallurgical pellet binder |
| CN102140575A (en) * | 2011-02-17 | 2011-08-03 | 中国工业投资（国际）有限公司 | Novel metallurgy and casting integration method |
| CN104498708A (en) * | 2014-12-09 | 2015-04-08 | 攀枝花环业冶金渣开发有限责任公司 | Pellets prepared from blast furnace slag iron fine powder as well as preparation method and application of pellets |
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Application publication date: 20170531 |