CN85105246A - The steel-making slag utilize method - Google Patents
The steel-making slag utilize method Download PDFInfo
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- CN85105246A CN85105246A CN198585105246A CN85105246A CN85105246A CN 85105246 A CN85105246 A CN 85105246A CN 198585105246 A CN198585105246 A CN 198585105246A CN 85105246 A CN85105246 A CN 85105246A CN 85105246 A CN85105246 A CN 85105246A
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- steel
- slag
- making slag
- agent
- lime
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The method of utilizing that relates to the steel-making slag.In the steel-making slag of molten, add following material: the rock of phyllosilicate by more than one, mineral or its weathered material, lapis calaminaris, fragments of glass, the casting ore in sand form, coal ash, useless brick, red soil, volcanic projection, blast furnace slag, desiliconization slag, the modifying agent that ferric oxide etc. are formed, make it to take place frit reaction, chilling is handled, carry out the deferrization processing subsequently again and obtain handling the steel-making slag, add therein lime and (or) gypsum, mix to pulverize and maybe should handle the steel-making slag, lime and (or) gypsum pulverizes respectively separately and then mixes, with the mixture of gained as the mud stiffening agent, the soil improvement agent, the caking agent of granulation and nodulizing etc.
Description
The present invention relates in the steelmaking process to produce in a large number, but handle extremely difficult steel-making slag effectively utilize method, in more detail, relate to will the steel-making slag as the method for mud stiffening agent, soil improvement agent or granulation and nodulizing binding agent.
Contain 2CaO.Al in the steel-making slag
2O
3, F.CaO, F.Mgo, 2CaO.Fe
2O
3, 4CaO.Al
2O
3.Fe
2O
3, Fe
2O
3, Fe
3O
4With FeO etc.
At present, this steel-making slag is housed in the slag ladle Rio and discharges after 20 minutes-12 hours.But, reach about 200-300 ℃ 2CaO.SiO as the pomace temperature
2Because β →
Transition process and therefore expansion damage does not have and effectively utilizes method, major part to be used as to fill and lead up material and discard.
On the other hand, in mud sclerosis operation, or adopt cement in the soft soil improvement, its shortcoming is that expense is very big thereby cost is very high, in addition, make binding agent with cement or cement and wilkinite, the powdered iron ore of poor plasticity done granulate or during pelletizing, if this binding agent of heavy addition just needs just can reach sclerosis for a long time.And, if addition is too much, can reduce the grade of the pig iron.
The objective of the invention is this natural resources of failing to utilize of above-mentioned steel-making slag is effectively utilized, specifically, in this steel-making slag, add the pulverizing additive of various processes, make it to have latent hydraulicity, in a single day promptly adding the water mixing is hardened character, as the mud stiffening agent, soil improvement agent or granulation and pellet caking agent.
In order to achieve the above object, the present invention adopts following method; In molten steel-making slag, add weight percent and be 5-30% by one or more following materials: the phyllosilicate rock, mineral or its weathered material, lapis calaminaris, fragments of glass, cast waste sand, coal ash, useless brick, red soil, volcanic projection, blast furnace slag, desiliconization slag, the modifying agent that ferric oxide etc. are formed, make it that frit reaction take place, grain slagization then, from its grain slag thing, remove de-iron part, in removing the grain slag thing of de-iron part, add lime that weight percent is 3-5% and (or) gypsum, and mix and pulverize, perhaps with the grain slag thing of the above-mentioned steel-making slag that removes de-iron part and above-mentioned with amount lime and (or) mix again behind the gypsum separated pulverizing, as the mud stiffening agent, the binding agent of soil improvement agent or granulation and pellet.
Among the present invention, at first in the steel-making slag of molten state, interpolation is by one or more following materials: the rock of phyllosilicate, mineral or its weathered material, lapis calaminaris, fragments of glass, cast waste sand, coal ash, useless brick, red soil, volcanic projection, blast furnace slag, desiliconization slag, the modifying agent that ferric oxide etc. are formed utilizes the sensible heat of melting slag to cause frit reaction.Owing to added this modifying agent, the mineral composition of steel-making slag is from α～β-2CaO.SiO
2Main body is transformed into the 2CaO.Mgs.2SiO main body, and melting point and viscosity reduction, thereby the rising of grain slag rate, thereby might be by grain slag process for producing glass body thing.
Add the method for this modifying agent:
(1) melting begins or drops in the refining furnace midway.
(2) drop in the refining furnace tapping back.
(3) when the refining furnace deslagging, drop into deslagging stream.
(4),, fall into the deslagging jar from the slag of smelting furnace in this position in lowering position input away from slag stream.
(5) put into the deslagging jar in advance as the surrogate of pad slag.
(6) its input form is for to become sandwich structure with slag in the deslagging jar.
In addition, the method that can also adopt pipe that contracts (lance pipe) and foamed gas together modifying agent to be dropped into.The add-on of modifying agent is thought of as 5%(weight)-30%(weight) be based on following reason.
In this case, the addition of modifying agent is less than 5%(weight) time, in the improvement of mineral composition, and reduce aspects such as melting point or viscosity and do not demonstrate special effect, therefore, the minimum 5%(weight of getting of addition); From working efficiency and economic point of view, wish to utilize the molten steel-making sensible heat that slag had to carry out frit reaction, therefore from this meaning, the highest 30%(weight of getting of addition).
As mentioned above; in the present invention; after the interpolation modifying agent makes it frit reaction takes place; the general using water cooling system carries out chilling to be handled; iron part of wherein containing with magnetic force sorting Separation and Recovery again; in its resistates, add lime and (or) gypsum and mixing; pulverize; perhaps remix behind the separated pulverizing; in this case, the minimum 3%(weight of getting of the addition of lime and gypsum), if not like this; setting time needs very long; and maximum hardenability is also very low, even the addition of modifying agent surpasses 5%(weight), Hardenability does not have too big variation yet; opposite with the object of the invention of utilizing the steel-making slag as much as possible; when being used as the caking agent of granulation or pellet, the grain piece that obtains and the grade of pellet reduce, so the addition of modifying agent is rational less than 5%.
The experiment and the result thereof that below are depicted as affirmation effect of the present invention and effect and carry out.
Table 1 illustrates chemical analysis value and the performance of experiment with sample.
Steel-making shown in the above-mentioned table 1
(A) analytical value after carrying out deferrization and handling .(C .(B)).
Following table 2 illustrates uses above-mentioned each sample, the ratio of mixture of each sample of producing by the ratio of mixture of Different Weight.
Table 2
The fusing point of the various samples that record with Sai Shi (Seger cone) thermometry shown in the table 2 is shown in table 3.
Table 3.
Said sample was placed on the middle maintenance of thermostatic drier (105-110 ℃) more than 24 hours, dried each sample 500 gram are put in the electrically molten magnesia crucible, fusion is again taken out outside the stove then in globars electric furnace (remaining on 1550 ℃), cools off, makes grain slag in water, after the drying, make it to be crushed to below 200 orders, add 3%(weight) lime mix, add and put into the ethenoid resin bag behind the water mixing and seal, check the sclerosis situation, shown in the table 4.
Table 4
◎ represents that feel is stone
Zero expression is hard.
△ represents a bit hard.
* expression is not hard.
In addition, the grain slag slag that is used as sample becomes bond state very soon, begins sclerosis after about 2-10 minute.
As mentioned above,, the solidification value of slag is reduced owing to the rock that adds phyllosilicate, mineral etc., and 2CaO.SiO
2Crystallization also few advanced vitrifying because grain slag is handled.And it is faster than the sclerosis of single steel-making slag.
Embodiment
Embodiment 1
Sample, cement, lime, terra alba that table 2 is listed are broken to below 200 meshes, are added to moisture being divided in 30.5% the mud (kaolin, montmorillenite and alpha-quartz main body) then, mix with the mortar mixing bowl.Divide three layers to insert in the soil test model their with beater, and maintenance one month under moisture conditions.After experiencing these processes, check its ultimate compression strength, the result lists following table 5 in.
Table 5
* 1, * 2. is the blast furnace ground-slag
Annotate: in the table 5, the addition of mud, Portland cement, unslaked lime, gypsum and sample all is weight percentage.The expression meaning of symbols such as O, the △ of expression sclerosis situation, X is the same with above-mentioned table 4.
Table 6
Embodiment 2
To not have plasticity-, loose fine ore (size-grade distribution is shown in table 6) to make pellet, study as the binding agent that raw material uses.Table 7 provides the blending ratio of sample.
At first as pilot study, (32 * 35mm, it is 1 ton/centimetre that moulding is pressed with the form moulding of fritter to use concrete compression testing machine (100 tons)
2, adding moisture is 4.5%), measure the ultimate compression strength under each timing, the results are shown in the table 8.
Well-mixed material is made nodulizing with pellet machine (50 * 50 * 32 millimeters, adding moisture is that 5% line pressure is 3.3 tons/centimetre), measure the qualification rate and the ultimate compression strength of its nodulizing, the result is shown in the table 9.
Table 7
Table 7(is continuous)
Number identical in test piece number (Test pc No.) in the table 7 and the table 2.
Mixture shown in the table 7 is crushed to 3100 ± 30 centimetres with ball mill
2/ gram.
Table 9
* 1 be illustrated in agglomerate
Indicate on the direction of arrow and pressurize until destructive intensity.
* 2 expression samples drop on the thick 10 millimeters iron plate from 1 meter high, are broken into 1/2 o'clock drop number.
The number on table 9 left side is identical with the number on table 8 left side.
Embodiment 3
In the fine ore shown in the following table 10, with the same proportioning of above-mentioned table 8, add that the steel-making ground-slag use as binding agent minces, Portland cement, wilkinite etc.Water is spread on the limit, the limit granulation, and forming diameter is the particle of 10-15 millimeter, table 11 illustrates the result that records of its granulation and whereabouts intensity etc.
Table 10
Table 11
* 1: after three days, sample is broken into the drop number of half from high 1 meter iron plate that drops into 10 mm thick.
* 2: the ultimate compression strength after three days.
The sequence number No on above-mentioned table 11 left side is consistent with the NO. on table 8 left side.
As mentioned above, according to the present invention, owing in molten steel-making slag, add the modifying agent of forming by the phyllosilicate rock, make it to take place frit reaction, as shown in table 3, melt temperature reduces, viscosity also descends simultaneously, therefore cooling and the hardened steel-making quantity of slag reduces in processing, and the chilling of water-cooled etc. handles and also carry out easily, and the chilling steel-making quantity of slag increases.Consequently, chilling is handled the glass growing amount increase in the steel-making slag.Table 4 illustrates under the correct grinding situation sclerosis character of himself.
In addition, in specific embodiment, can find out according to the table 5 that embodiment 1 result is shown, the steel-making ground-slag of handling, lime and (or) mixture of gypsum, began later on to become stone through one day, compressive strength rate blast furnace slag height after 30 days is enough to the stiffening agent as mud.
Embodiment 2 is the examples that the present invention are used to make the pellet aspect.By the result shown in table 9 and the table 10, we find that compare with the method that former use cement is made binding agent, early stage intensity is enough.The result shows that through after long-time, intensity improves when using cement, this is feasible, and after making nodulizing with pellet machine, when molding and conveyor transport but this shortcoming of destructible can be resolved.When fine ore is made pelletizing as binding agent, shown in the table 11 of embodiment 3, if it is good and the nodulizing of sufficient intensity arranged to utilize the inventive method just can make granulation.
Therefore, can effectively utilize as industrial waste by the present invention or do not add the steelmaking slag that utilizes natural resources. Be easy to accomplish mud sclerosis and soil improvement, as nodulizing and adhesive for granulating the time, we find that a small amount of interpolation the (this addition can not cause that grade descends) can be had the result of enough hardening capacities in early days.
Claims (3)
1, the steel-making slag utilize method, it is characterized in that, in fused steel-making slag, add 5-30% (weight) at least by more than one following material: the rock of phyllosilicate, mineral or its weathered material, lapis calaminaris, fragments of glass, the casting ore in sand form, coal ash, useless brick, red soil, volcanic projection, blast furnace slag, desiliconization slag, the modifying agent that ferric oxide etc. are formed, make it to take place frit reaction, chilling is handled, carry out deferrization subsequently again and handle the steel-making slag that obtains handling, in this processing steel-making slag, add 3-5% (weight) lime and (or) gypsum, mix then and pulverize, perhaps, should handle the steel-making slag, lime and (or) remix behind the gypsum separated pulverizing, the add-on of lime and gypsum is same as described above to be 3-5% (weight).
2, according to the method for utilizing of the described steel-making slag of claim (1), it is characterized in that, above-mentioned powder mix is minced or pulverize after mixture as mud stiffening agent or soil improvement agent.
3, according to the method for utilizing of the described steel-making slag of claim (1), it is characterized in that, above-mentioned powder mix is minced or pulverize after mixture as the binding agent of granulation and nodulizing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN198585105246A CN85105246A (en) | 1985-07-09 | 1985-07-09 | The steel-making slag utilize method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN198585105246A CN85105246A (en) | 1985-07-09 | 1985-07-09 | The steel-making slag utilize method |
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| Publication Number | Publication Date |
|---|---|
| CN85105246A true CN85105246A (en) | 1987-01-07 |
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|---|---|---|---|
| CN198585105246A Pending CN85105246A (en) | 1985-07-09 | 1985-07-09 | The steel-making slag utilize method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100451131C (en) * | 2005-11-23 | 2009-01-14 | 上海宝钢冶金建设公司 | Production and utilization process for making steel using smelting slag |
| CN101792274A (en) * | 2010-03-19 | 2010-08-04 | 华南理工大学 | Calcium-silicon-aluminum property regulating material for carrying out on-line high-temperature reconstruction on medium-alkalinity steel slag and application thereof |
| CN1906137B (en) * | 2003-12-18 | 2011-06-15 | 拉法尔热公司 | Hydraulic mineral composition, production method thereof and cememtitious products and hydraulic binders containing one such composition |
| CN102382912A (en) * | 2011-11-14 | 2012-03-21 | 中冶南方工程技术有限公司 | Method for treating blast furnace slag |
| CN101723566B (en) * | 2008-10-21 | 2012-10-10 | 宝山钢铁股份有限公司 | Method for disposing waterworks sludge |
| CN104673965A (en) * | 2015-03-17 | 2015-06-03 | 马鞍山市华东冶金科技发展有限公司 | On-line molten steel slag modification method |
| CN110747345A (en) * | 2019-11-05 | 2020-02-04 | 邯郸钢铁集团有限责任公司 | Converter fly ash pressed brick and preparation and utilization methods thereof |
| CN113201620A (en) * | 2021-05-19 | 2021-08-03 | 宝武集团鄂城钢铁有限公司 | Method for smelting sulfur-containing steel grade by using desulphurization slag |
-
1985
- 1985-07-09 CN CN198585105246A patent/CN85105246A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1906137B (en) * | 2003-12-18 | 2011-06-15 | 拉法尔热公司 | Hydraulic mineral composition, production method thereof and cememtitious products and hydraulic binders containing one such composition |
| CN100451131C (en) * | 2005-11-23 | 2009-01-14 | 上海宝钢冶金建设公司 | Production and utilization process for making steel using smelting slag |
| CN101723566B (en) * | 2008-10-21 | 2012-10-10 | 宝山钢铁股份有限公司 | Method for disposing waterworks sludge |
| CN101792274A (en) * | 2010-03-19 | 2010-08-04 | 华南理工大学 | Calcium-silicon-aluminum property regulating material for carrying out on-line high-temperature reconstruction on medium-alkalinity steel slag and application thereof |
| CN102382912A (en) * | 2011-11-14 | 2012-03-21 | 中冶南方工程技术有限公司 | Method for treating blast furnace slag |
| CN104673965A (en) * | 2015-03-17 | 2015-06-03 | 马鞍山市华东冶金科技发展有限公司 | On-line molten steel slag modification method |
| CN110747345A (en) * | 2019-11-05 | 2020-02-04 | 邯郸钢铁集团有限责任公司 | Converter fly ash pressed brick and preparation and utilization methods thereof |
| CN113201620A (en) * | 2021-05-19 | 2021-08-03 | 宝武集团鄂城钢铁有限公司 | Method for smelting sulfur-containing steel grade by using desulphurization slag |
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