CN87100826A - Utilize the high reactivity bessemer furnace slag to produce the method for ferric-cement - Google Patents
Utilize the high reactivity bessemer furnace slag to produce the method for ferric-cement Download PDFInfo
- Publication number
- CN87100826A CN87100826A CN87100826.2A CN87100826A CN87100826A CN 87100826 A CN87100826 A CN 87100826A CN 87100826 A CN87100826 A CN 87100826A CN 87100826 A CN87100826 A CN 87100826A
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- CN
- China
- Prior art keywords
- furnace slag
- cement
- bessemer furnace
- slag
- modification
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Abstract
A kind of method of utilizing the bessemer furnace slag after the modification to produce ferric-cement.Present method is under the normal smelting technology condition of converter, when adding the slag making raw material, add active calcium oxide and fine aluminum alumina, obtain the modification bessemer furnace slag, after hot application, fragmentation, mix an amount of dihydrate gypsum, carry out grinding again and produce the method for ferric-cement, present method has characteristics such as technology is simple, easy handling, comprehensive utilization.
Description
The present invention is a kind of method about comprehensive utilization bessemer furnace slag direct production ferric-cement.
Along with the continuous increase of converter steel output, bessemer furnace slag is more and more.In the past, these a large amount of bessemer furnace slags quilts are piled up in the slag field as industrial residue, and contaminate environment takies the farmland.At the problem of above-mentioned existence, countries in the world are all in the research of setting about handling these waste residues.
According to " metallurgical industry waste residue treatment process collects with utilizing scientific and technological achievement " the 230th page of introduction of a book, Japan utilizes slag manufacturing mineral composition to be: C
3S, C
2S, C
6A
2The cement clinker of F.West Germany utilizes slag, blast-furnace slag and raw meal prepared from lime to burn till sulphate-resistant cement.
China is utilizing bessemer furnace slag to add blast furnace granulated slag, gypsum as raw material now, produces steel slag cement after adding a certain amount of Portland clinker, mixing, grinding again.
More than several methods of utilizing bessemer furnace slag to produce cement, all be with bessemer furnace slag as the raw material of producing cement, just can become the grog of producing cement through secondary clacining.These methods, complex process, steel slag utilization rate are low; And when secondary clacining, will expend a large amount of energy.
Purpose of the present invention is exactly the problems that exist at above-mentioned several methods of utilizing slag to produce cement, proposes a kind of bessemer furnace slag that utilizes after the modification, without the method for secondary clacining direct production ferric-cement.
Feature of the present invention is to guarantee to make its bessemer furnace slag reach the requirement of producing cement under the normal technology prerequisite of smelting of converter.Promptly utilize in the converter steelmaking process, when adding other slag making raw materials, add an amount of active calcium oxide and fine aluminum alumina, make it the slag modification and become a kind of highly active slag.The granularity of the active calcium oxide that adds should be less than 40mm, and its granularity should meticulously not be Powdered, and the content of calcium oxide is: 65～85%; The granularity of the fine aluminum vanadine that adds should be less than 45mm, AI
2O
3Content be: 75～85%.Under the prerequisite that guarantees the converter molten steel quality, the Chemical Composition of slag is controlled in the following scope:
SiO
2AI
2O
3MgO CaO
15～17%????4～7%????10～12%????50～55%
Mineral composition is: C
3S, C
2S and C
4AF(tricalcium silicate, Dicalcium Phosphate (Feed Grade) and iron calcium aluminate) summation greater than 70%.The basicity of slag is controlled at 3.0～3.5.The quality that like this, had both guaranteed steel has also satisfied the requirement of producing ferric-cement simultaneously.
Technical process of the present invention is:
The normal smelting technology of converter → adding active calcium oxide and fine aluminum alumina → adjustment slag are high reactivity slag → control bessemer furnace slag Chemical Composition, basicity and mineral composition → slag tap → hot application → fragmentation → adding dihydrate gypsum → grinding → product cement.
The present invention utilizes the characteristics that the Chemical Composition of bessemer furnace slag and mineral composition are all close with Portland clinker and iron level is higher, at CaO in the bessemer furnace slag and AI
2O
3Content is on the low side, does not reach the standard of producing cement, adds an amount of active calcium oxide and fine aluminum alumina when taking to add the slag making raw material in converter steelmaking process, makes slag reach the standard of producing cement.Owing to added calcium oxide, the also corresponding raising of the basicity of slag, the mineral composition in the slag simultaneously be increasing and change with basicity also.At the smelting initial stage, the basicity in the slag is lower, and essential mineral consists of peridotites in its slag, along with increasing of basicity, in the slag following reaction will take place:
The reason that produces above-mentioned substitution reaction is because the alkalescence of CaO is stronger than the alkalescence of oxide compounds such as MgO, FeO, MnO, therefore, as long as there are enough CaO to satisfy and acidic oxide (SiO
2, AI
2O
3, Fe
2O
3, P
2O
3) chemosynthesis, MgO, FeO, MnO will become free state and crystallization is separated out.High basicity slag essential mineral is: C
3S, C
2S reaches CF etc. mutually with RO, and AI is being arranged
2O
3When existing, can generate C
4AF or C
6A
2F
3Like this, the hydraulic mineral of slag have been increased.The C that slag generates under 1600～1700 ℃ high temperature
3S is SA triclinic(crystalline)system, and the C in the cement clinker
3S is a high-temperature stable phase oblique system.Therefore, the intensity of slag is high like that not as cement clinker.In the higher slag of basicity, owing to there is p
2O
5, can at first form inactive Na Gaisimite stone (7CaOp
2O
52SiO
2), hindered C
3The generation of S, thereby, the activity of slag reduced.
According to the Chemical Composition of bessemer furnace slag and the characteristics of mineral composition, in order to improve the activity of slag, reach the requirement of producing cement, the present invention is in converter steelmaking process, when adding the slag making raw material, add active calcium oxide and fine aluminum alumina, make it under normal smelting technology condition, to promote the C in the slag
3S, C
2S and C
4The generation of AF improves the active and satisfied requirement of producing cement of slag thereby reach.
Chemical Composition synopsis before and after the slag modification
Technology of the present invention is simple, easy handling, save energy.Adopt the present invention that the converter lining life-span is not had influence.The invention provides in converter steelmaking, both produced the high-quality steel, produce method again without the high reactivity slag of secondary clacining direct production ferric-cement.For the comprehensive utilization of bessemer furnace slag provides a new method.
The embodiment of the invention is as follows:
In 120 tons of converters of nominal, under the normally smelting situation, adding the slag making raw material simultaneously, adding CaO content is 70%, granularity adds AI simultaneously less than 6 tons of the active calcium oxides of 40mm
2O
3Content is 78.5%, and granularity is less than 1.2 tons in the fine aluminum alumina of 45mm.The smelting technology of converter is by normally carrying out, and through Chemical Analysis, the Chemical Composition of its slag is:
| SiO 2% | AL 2O 3% | CaO% | MgO% | FeO% | TFe% | Fe 2O 3% | P 2O 5% | TiO% | S% |
| 17.32 | 4.79 | 53.28 | 5.54 | 10.15 | 9.84 | 2.79 | 0.513 | 0.94 | 0.144 |
Mineral composition is:
| Tricalcium silicate C 3S％ | Dicalcium Phosphate (Feed Grade) C 2S％ | RO phase % | Fu Shi body % | Iron calcium aluminate C 4AF％ | Metallic object % | Other % |
| 46 | 22 | 10.5 | 3.5 | 6 | 1 | 3 |
Slag tap after the requirement according to the invention,, make its high reactivity slag granularity, add 5～10% dihydrate gypsums (SO wherein less than 15mm through hot application, crushing-magnetic selection
3Content is greater than 35%, and granularity is less than 15mm), fineness is 3900cm behind grinding
2/ g promptly produces the slag ferric-cement that meets cement standard.Test block by the ferric-cement of high reactivity slag production is made is compared as follows through checking its physicals and 325# silicate cement:
Claims (5)
1, a kind of method of utilizing the bessemer furnace slag after the modification to produce ferric-cement.It is characterized in that said modification bessemer furnace slag, is to add active calcium oxide and fine aluminum alumina in the adding slag making raw material in normal the smelting, makes it bessemer furnace slag and is modified as highly active bessemer furnace slag.
2, a kind of according to the described method of utilizing the bessemer furnace slag after the modification to produce ferric-cement of claim 1, the granularity that it is characterized in that the active calcium oxide that adds is less than 40mm, and calcium oxide content is 65～85%; The granularity of fine aluminum alumina is less than 45mm, AL
2O
3Content be 75～85%.
3, a kind of according to the described method of utilizing the bessemer furnace slag after the modification to produce ferric-cement of claim 1, it is characterized in that the Chemical Composition of said bessemer furnace slag is:
SiO
2AI
2O
3MgO CaO
15～17%??4～7%??10～12%??50～55%
Basicity is: 3.0～3.5.
Mineral composition is: tricalcium silicate (C
3S), Dicalcium Phosphate (Feed Grade) (C
2S), iron calcium aluminate (C
4AF), its summation is greater than 70%.
4, a kind of according to the described method of utilizing the bessemer furnace slag after the modification to produce ferric-cement of claim 1, it is characterized in that the high reactivity bessemer furnace slag of resulting modification after hot application, fragmentation, magnetic separation are handled, make its granularity less than 15mm, add dihydrate gypsum then and carry out grinding.
5, a kind of according to the described method of utilizing the bessemer furnace slag after the modification to produce ferric-cement of claim 1 and claim 4, the add-on that it is characterized in that described gypsum be 5～10% granularities less than 15mm, SO
3Content is greater than 35%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87100826.2A CN1004546B (en) | 1987-02-13 | 1987-02-13 | Utilize high reactivity bessemer furnace slag to produce the method for ferric-cement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87100826.2A CN1004546B (en) | 1987-02-13 | 1987-02-13 | Utilize high reactivity bessemer furnace slag to produce the method for ferric-cement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN87100826A true CN87100826A (en) | 1987-12-16 |
| CN1004546B CN1004546B (en) | 1989-06-21 |
Family
ID=4813029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN87100826.2A Expired CN1004546B (en) | 1987-02-13 | 1987-02-13 | Utilize high reactivity bessemer furnace slag to produce the method for ferric-cement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1004546B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103553512A (en) * | 2013-07-22 | 2014-02-05 | 南京工业大学 | Method for producing concrete by using primary grinding steel slag active micro-powder |
| CN108609875A (en) * | 2018-05-15 | 2018-10-02 | 鞍钢股份有限公司 | A method of preparing cement admixture using vessel slag |
| CN111606583A (en) * | 2020-06-01 | 2020-09-01 | 上海驰春节能科技有限公司 | Equipment and method for producing cement by using liquid steel slag as raw material |
-
1987
- 1987-02-13 CN CN87100826.2A patent/CN1004546B/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103553512A (en) * | 2013-07-22 | 2014-02-05 | 南京工业大学 | Method for producing concrete by using primary grinding steel slag active micro-powder |
| CN108609875A (en) * | 2018-05-15 | 2018-10-02 | 鞍钢股份有限公司 | A method of preparing cement admixture using vessel slag |
| CN111606583A (en) * | 2020-06-01 | 2020-09-01 | 上海驰春节能科技有限公司 | Equipment and method for producing cement by using liquid steel slag as raw material |
| CN111606583B (en) * | 2020-06-01 | 2021-09-21 | 上海驰春节能科技有限公司 | Equipment and method for producing cement by using liquid steel slag as raw material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1004546B (en) | 1989-06-21 |
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| C13 | Decision | ||
| GR02 | Examined patent application | ||
| WD01 | Invention patent application deemed withdrawn after publication |