CN105925738A - Environmental-friendly modifier for high titania bearing blast furnace slag and modifying method of environmental-friendly modifier - Google Patents
Environmental-friendly modifier for high titania bearing blast furnace slag and modifying method of environmental-friendly modifier Download PDFInfo
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- CN105925738A CN105925738A CN201610550605.7A CN201610550605A CN105925738A CN 105925738 A CN105925738 A CN 105925738A CN 201610550605 A CN201610550605 A CN 201610550605A CN 105925738 A CN105925738 A CN 105925738A
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- furnace slag
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
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Abstract
The invention discloses an environmental-friendly modifier for high titania bearing blast furnace slag and a modifying method of the environmental-friendly modifier. The environmental-friendly modifier comprises a composition, that is, paigeite. During the process of blast furnace smelting, the environmental-friendly modifier is added in a blast furnace, wherein the adding quantity of the environmental-friendly modifier is 0.5-3 percent of the mass of the high titania bearing blast furnace slag in the blast furnace. Through the researching on the paigeite modifier and the adding method of the paigeite modifier, the paigeite modifier can replace fluorite, so that the cost is reduced; the slag-iron reaction can be promoted, so that the blast furnace is beneficial for further stable operation; the environmental-friendly smelting is realized; the slag-iron separation is promoted, so that the iron loss is reduced.
Description
Technical field
Embodiments of the present invention relate to smelting iron and steel technology and field of Environment Protection, more specifically, the reality of the present invention
The mode of executing relates to environment protection modification agent and the method for modifying of a kind of high-titanium blast furnace slag.
Background technology
Vanadium titano-magnetite blast furnace process has the characteristics such as low into stove ore deposit grade, slag sluicing system is difficult, iron loss is high,
The especially existence of titaniferous high-melting-point thing phase in slag, has strong influence to the stable smooth operation of blast furnace process.
CN101245396A discloses a kind of additive reducing viscosity of high titanium type furnace cinder and preparation method thereof,
Mix with Cab-O-sil, Fluorspar Powder, glass dust and water-soluble binder, suppress, dry and obtain, go out at blast furnace
During ferrum, this additive is added in blast furnace main channel, utilize the heat melts of blast furnace slag and molten iron to add
Add agent, be allowed to fully react with blast furnace slag, change the chemical composition of blast furnace slag, reduce blast furnace slag fusing point and stream
Dynamic property, to reduce the purpose of slag iron-holder in tap drain.But the fluorite not only valency used in this technology
Lattice are expensive, and environment can cause pollution greatly.
Summary of the invention
Instant invention overcomes the deficiencies in the prior art, it is provided that the environment protection modification agent of a kind of high-titanium blast furnace slag and changing
Property method, can solve high-titanium blast furnace slag modifying process to use fluorite cause cost is high with expectation, pollute
The problem of weight.
For solving above-mentioned technical problem, one embodiment of the present invention by the following technical solutions:
The environment protection modification agent of a kind of high-titanium blast furnace slag, its constituent is paigeite.
The feed postition of the environment protection modification agent of described high-titanium blast furnace slag can by be by paigeite with lump ore in the way of
Jointly enter stove with sintering deposit, pellet, or in the way of lump ore after sintering deposit, pellet enter stove
Reenter stove.
A kind of environment protection modification method of high-titanium blast furnace slag, the step of the method is: in blast furnace ironmaking process,
Joining in blast furnace by the environment protection modification agent of above-mentioned high-titanium blast furnace slag, its addition is high titanium in described blast furnace
The 0.5%～3% of the quality of type blast furnace slag.
The preferred embodiments of the invention are: environment protection modification described in the environment protection modification method of high-titanium blast furnace slag
The addition of agent is 1%～2% of the quality of high-titanium blast furnace slag in blast furnace.
The present invention is directed high-titanium blast furnace slag, it is especially difficult that high-titanium blast furnace slag has smelting, and blast furnace is not
Stable feature suitable, difficult, this is also the difference of high-titanium blast furnace slag and other type blast furnace slag, the most generally
In the case of, other type blast furnace slag can be used in modification and obtains the additive of better effects, applies at high titanium
In type blast furnace slag, it is difficult to reach preferable effect, the modified needs of high-titanium blast furnace slag is added with targetedly
Modifying agent.
Compared with prior art, the method have the advantages that the present invention is by paigeite modifying agent
And the research of Adding Way, fluorite can not only be substituted, reduce cost, and can promote that slag ferrum reacts,
Be conducive to the further stable smooth operation of blast furnace, it is achieved environmental type is smelted, promote slag sluicing system, reduce ferrum
Damage.
Accompanying drawing explanation
Fig. 1 is the mineral phase structure of high-titanium blast furnace slag before modified.
Fig. 2 is the mineral phase structure utilizing the modified high-titanium blast furnace slag of environment protection modification agent of the present invention.
Fig. 3 is to add the Temperature-viscosity curves of high-titanium blast furnace slag after environment protection modification agent of the present invention.
Fig. 4 is to be separately added into the Temperature-viscosity curves of high-titanium blast furnace slag after 2% paigeite and 2% fluorite.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and reality
Execute example, the present invention is further elaborated.Only should be appreciated that specific embodiment described herein
Only in order to explain the present invention, it is not intended to limit the present invention.
Embodiment 1
Using paigeite as the environment protection modification agent of high-titanium blast furnace slag, in blast furnace ironmaking process, by this environmental protection
Modifying agent, with lump ore form, joins in blast furnace with sintering deposit, pellet, and addition is blast furnace slag
The 1% of amount.
Embodiment 2
The addition of the present embodiment environment protection modification agent is the 2% of blast furnace slag quality, and other is same as in Example 1.
Embodiment 3
The addition of the present embodiment environment protection modification agent is the 3% of blast furnace slag quality, and other is same as in Example 1.
Verify the environment protection modification agent of the present invention modified effect to high-titanium blast furnace slag below.
Taking paigeite, fluorite and on-the-spot blast furnace slag and carry out component analysis respectively, the particle size range of three kinds of materials is equal
It is 75～106 μm.
Owing to stable, the direct motion of produced on-site are affected very big by the viscosity of blast furnace slag, it it is slag metallurgical performance
One major influence factors, after therefore can being added by research modifying agent, the situation of change of slag viscosity is reacted
The modified effect of modifying agent.
Take paigeite powder, mix homogeneously with blast furnace slag respectively according to the ratio of 1%, 2%, 3%, mixture is entered
Row viscosity measurement, and to blast furnace slag before modified after thing be analyzed mutually.Viscosity measurement as it is shown on figure 3,
Wherein, 0# refers to the change curve of unmodified blast furnace slag viscosity with temperature, after 1# refers to 1% modifier modification
The viscosity B coefficent curve of blast furnace slag, 2# refers to the viscosity B coefficent curve of blast furnace slag after 2% modifier modification, and 3# is
Refer to the viscosity B coefficent curve of blast furnace slag after 3% modifier modification；The most at that same temperature,
The viscosity of the blast furnace slag employing modifying agent is lower.Material phase analysis result after before modified is as shown in table 1.
Table 1 blast furnace slag before modified after material phase analysis result
| Sample | Perovskite (%) | Titanium carbonitride (%) | Anosovite (%) | Containing titanaugite (%) |
| Before modified | 42.35 | 7.15 | 0.43 | 47.48 |
| 1% modifier modification | 35.51 | 7.68 | 2.31 | 50.68 |
| 2% modifier modification | 32.11 | 7.82 | 2.47 | 54.07 |
Note: perovskite, titanium carbonitride, anosovite and containing titanaugite be that high-titanium blast furnace slag originally exists for
Thing phase, modifying agent can change the content of each thing phase.In table 1, perovskite, titanium carbonitride are high-melting-point things, its
Remaining is low-melting-point material.
Knowable to table 1 and Fig. 3 analysis, the addition of modifying agent enables to the quantity of titaniferous high-melting-point thing phase and reduces
Increase mutually with low-melting-point material, improve the metallurgical performance of high-titanium blast furnace slag.Meanwhile, the addition of paigeite is replaced
For fluorite, the most more economically, and environmental protection.
In order to be contrasted with the modified effect of Fluorspar Powder by the modified effect of modifying agent of the present invention, additionally take firefly
Stone powder, respectively according to the blast furnace slag mix homogeneously that the ratio of 2% is same as described above, carries out viscosity survey to mixture
Amount, measurement result is as shown in Figure 4.From fig. 4, it can be seen that utilize the viscosity of the modified blast furnace slag of fluorite and adopt
Viscosity with the blast furnace slag after the modifier modification of the present invention of equal in quality is essentially identical, and paigeite pair is described
The effect of the effect of the risen modifying function of blast furnace slag modifying function risen to blast furnace slag with fluorite is essentially identical.
After above-mentioned test completes, being divided into two parts by the blast furnace slag that 2% paigeite is modified, portion carries out air cooling, separately
Portion carries out water-cooled, then two parts of modified blast furnace slag sample presentations after cooling is carried out strata behavior, takes one simultaneously
The unmodified blast furnace slag of part sample presentation simultaneously carries out strata behavior.Air cooling and water-cooled are the different types of cooling, empty
Can observe the change that mineral structure occurs after cold and water-cooled, after water-cooled, the change of mineral structure is the condition of high temperature
Under real-time change, air cooling can amplify the crystal grain of mineral, allows it fully grow up.Air cooling gained sample ore analysis is tied
Fruit is paigeite so that titaniferous high-melting-point thing low melting point pyroxene phase transition in opposite directions, water-cooled gained sample ore
Analysis result is that paigeite can suppress the generation of perovskite solid particle under smelting temperature, and result of study shows,
Although titanium-containing blast furnace slag is under the different types of cooling, the use of paigeite modifying agent can be in slag
Phase transition plays the effect of being effectively facilitated.Blast furnace slag mineral phase structure is as it is shown in figure 1, air cooling gained changes before modified
Property blast furnace slag mineral phase structure is as shown in Figure 2.
Tu1Zhong A district refers to high-melting-point thing ore deposit phase region, and B district refers to that low-melting-point material ore deposit phase region, Tu2Zhong A district substantially subtract
Little, B district increases, and illustrates that the addition of modifying agent enables to quantity minimizing and the low melting point of titaniferous high-melting-point thing phase
Thing increases mutually.
Although reference be made herein to invention has been described for the explanatory embodiment of the present invention, however, it should reason
Solving, those skilled in the art can be designed that a lot of other amendments and embodiment, these amendments and enforcement
Mode will fall within spirit disclosed in the present application and spirit.More specifically, disclosed in the present application
In the range of, the building block of theme composite configuration and/or layout can be carried out multiple modification and improvement.Except
The modification that building block and/or layout are carried out and improve outside, to those skilled in the art, other
Purposes also will be apparent from.
Claims (3)
1. the environment protection modification agent of a high-titanium blast furnace slag, it is characterised in that its constituent is paigeite.
2. the environment protection modification method of a high-titanium blast furnace slag, it is characterised in that the step of the method is: at blast furnace
In smelting process, the environment protection modification agent of the high-titanium blast furnace slag described in claim 1 is joined blast furnace
In, its addition is 0.5%～3% of the quality of high-titanium blast furnace slag in described blast furnace.
The environment protection modification method of high-titanium blast furnace slag the most according to claim 2, it is characterised in that described ring
Protect addition is the quality of high-titanium blast furnace slag in blast furnace 1%～the 2% of modifying agent.
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| CN201610550605.7A CN105925738A (en) | 2016-07-13 | 2016-07-13 | Environmental-friendly modifier for high titania bearing blast furnace slag and modifying method of environmental-friendly modifier |
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| CN201610550605.7A CN105925738A (en) | 2016-07-13 | 2016-07-13 | Environmental-friendly modifier for high titania bearing blast furnace slag and modifying method of environmental-friendly modifier |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106834574A (en) * | 2017-02-24 | 2017-06-13 | 本钢板材股份有限公司 | One kind is colded pressing boracic pelletizing blast furnace prepurging solvent and its preparation, application method |
| CN107400744A (en) * | 2017-08-07 | 2017-11-28 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of smelting process of high chromium high-titanium iron ore stone |
| CN107400745A (en) * | 2017-08-07 | 2017-11-28 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of smelting process of the iron ore concentrate containing vanadium, titanium and chromium |
| CN114472464A (en) * | 2022-01-14 | 2022-05-13 | 江苏大学 | Method for efficiently recycling iron and phosphorus resources in phosphorus-containing steel slag |
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| BE796849A (en) * | 1972-03-17 | 1973-07-16 | Borax Sa | HAUT-FOURNEAU DAIRY IMPROVEMENT PROCESS |
| CN101245396A (en) * | 2008-03-24 | 2008-08-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Additive agent for reducing viscosity of high titanium type furnace cinder and manufacture method thereof |
| CN102586517A (en) * | 2012-04-05 | 2012-07-18 | 山西太钢不锈钢股份有限公司 | Stainless steel slag treatment method |
| CN103276126A (en) * | 2013-06-05 | 2013-09-04 | 北京科技大学 | Method for improving liquidity of high titanium slag in blast furnace smelting vanadium titano-magnetite |
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2016
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Patent Citations (4)
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| BE796849A (en) * | 1972-03-17 | 1973-07-16 | Borax Sa | HAUT-FOURNEAU DAIRY IMPROVEMENT PROCESS |
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| CN102586517A (en) * | 2012-04-05 | 2012-07-18 | 山西太钢不锈钢股份有限公司 | Stainless steel slag treatment method |
| CN103276126A (en) * | 2013-06-05 | 2013-09-04 | 北京科技大学 | Method for improving liquidity of high titanium slag in blast furnace smelting vanadium titano-magnetite |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106834574A (en) * | 2017-02-24 | 2017-06-13 | 本钢板材股份有限公司 | One kind is colded pressing boracic pelletizing blast furnace prepurging solvent and its preparation, application method |
| CN107400744A (en) * | 2017-08-07 | 2017-11-28 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of smelting process of high chromium high-titanium iron ore stone |
| CN107400745A (en) * | 2017-08-07 | 2017-11-28 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of smelting process of the iron ore concentrate containing vanadium, titanium and chromium |
| CN114472464A (en) * | 2022-01-14 | 2022-05-13 | 江苏大学 | Method for efficiently recycling iron and phosphorus resources in phosphorus-containing steel slag |
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Application publication date: 20160907 |