CN108018404A - The Application way of low calcium desulfurizing slag of hot metal - Google Patents
The Application way of low calcium desulfurizing slag of hot metal Download PDFInfo
- Publication number
- CN108018404A CN108018404A CN201711394772.8A CN201711394772A CN108018404A CN 108018404 A CN108018404 A CN 108018404A CN 201711394772 A CN201711394772 A CN 201711394772A CN 108018404 A CN108018404 A CN 108018404A
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- CN
- China
- Prior art keywords
- hot metal
- low calcium
- slag
- desulfurizing slag
- calcium desulfurizing
- 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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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/064—Dephosphorising; Desulfurising
- C21C7/0645—Agents used for dephosphorising or desulfurising
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention belongs to field of metallurgy, and in particular to a kind of Application way of low calcium desulfurizing slag of hot metal.Existing low calcium desulfurizing slag of hot metal yield is big, pollution environment, and the problem of can not recycling, the present invention provides a kind of Application way of low calcium desulfurizing slag of hot metal, comprises the following steps：Low calcium desulfurizing slag of hot metal is taken, is sintered with addition of 90 99% high-quality miberal powder；The low calcium desulfurizing slag of hot metal composition includes：By weight percentage, TFe 50~60%, SiO21~6%, CaO 15~25%, MgO 1~5%, Al2O31~5%.The present invention takes full advantage of industrial waste low calcium desulfurizing slag of hot metal and is sintered, and can improve sinter structure, ensures sinter yield rate, drum strength etc., industrial by-products low calcium desulfurizing slag of hot metal can also be efficiently used, environmental pressure is reduced, saves production cost, remarkable in economical benefits.
Description
Technical field
The invention belongs to field of metallurgy, and in particular to a kind of Application way of low calcium desulfurizing slag of hot metal.
Background technology
During external desulfurization of hot metal, substantial amounts of desulfurizing slag of hot metal can be produced, due to FeO, S, P, Al in desulfurization slag2O3、MgO
Equal size is high, condition can be provided for the solid-liquid reaction in sintering oxidation exothermic process, so as to improve sinter yield rate, rotary drum
Intensity and improvement granularmetric composition.Led at the same time for the regeneration to waste resource, it is necessary to carry out utilizing for desulfurizing slag of hot metal
Study in domain.
The content of the invention
The technical problem to be solved in the present invention is：Existing low calcium desulfurizing slag of hot metal yield is big, pollution environment, can not recycle profit
The problem of using.
The present invention solve above-mentioned technical problem technical solution be：A kind of Application way of low calcium desulfurizing slag of hot metal is provided,
Comprise the following steps：
Low calcium desulfurizing slag of hot metal is taken, is sintered with addition of the high-quality miberal powder of 90-99%；The low calcium desulfurizing slag of hot metal
Composition includes：By weight percentage, TFe 50~60%, SiO21~6%, CaO 15~25%, MgO 1~5%, Al2O3
1~5%.
Wherein, in the Application way of above-mentioned low calcium desulfurizing slag of hot metal, the high-quality miberal powder is magnesium oxide-based desulfurizing agent
Or molten iron slag making desulfurizing agent.
Wherein, in the Application way of above-mentioned low calcium desulfurizing slag of hot metal, the particle diameter of the low calcium desulfurizing slag of hot metal is 0
~10mm.
Wherein, in the Application way of above-mentioned low calcium desulfurizing slag of hot metal, the sintering temperature is 1550~1600 DEG C, sintering
Time is 2~5min.
Beneficial effects of the present invention are：
The present invention provides a kind of Application way of low calcium desulfurizing slag of hot metal, by by the desulfurization slag and magnesium oxide-based desulfurization
The high-quality miberal powder such as agent or other molten iron slag making desulfurizing agents is reasonably matched, and control sintering condition is sintered, Neng Gougai
Kind sinter structure, ensures sinter yield rate, drum strength etc., moreover it is possible to efficiently use industrial by-products low calcium desulfurizing iron
Slag, reduces environmental pressure, saves production cost, remarkable in economical benefits.
Embodiment
The present invention provides a kind of Application way of low calcium desulfurizing slag of hot metal, comprise the following steps：
Low calcium desulfurizing slag of hot metal is taken, is sintered with addition of the high-quality miberal powder of 90-99%；The low calcium desulfurizing slag of hot metal
Composition includes：By weight percentage, TFe 50~60%, SiO21~6%, CaO 15~25%, MgO 1~5%, Al2O3
1~5%.
Wherein, in the Application way of above-mentioned low calcium desulfurizing slag of hot metal, the high-quality miberal powder is magnesium oxide-based desulfurizing agent
Or other molten iron slag making desulfurizing agents etc..
Wherein, in the Application way of above-mentioned low calcium desulfurizing slag of hot metal, the particle diameter of the low calcium desulfurizing slag of hot metal is 0
~10mm.
Wherein, in the Application way of above-mentioned low calcium desulfurizing slag of hot metal, the sintering temperature is 1550~1600 DEG C, sintering
Time is 2~5min.
The embodiment of the present invention is further described with reference to embodiment, is not therefore limited the present invention
System is among the embodiment described scope.
Embodiment 1 is sintered using low calcium desulfurizing slag of hot metal of the present invention
Using desulfurizing slag of hot metal as raw material, by broken, screening process, the particulate material that particle diameter is 8mm is chosen, the present invention is made
For substituting the low calcium desulfurizing slag of hot metal of part high-grade miberal powder in sintering, chemical group is grouped into：TFe 55.99%, SiO2
19.00% part of 4.02%, CaO, MgO 1.94%, Al2O33.89%.
According to 1~10% with addition of requiring, by the input actual sintered production of low calcium desulfurizing slag of hot metal.With addition of 2%
Under ratio, the drum strength of sinter is slightly deteriorated, and have dropped 0.16 percentage point, and little, sintering is influenced on sinter quality
Ore deposit TFe rises 0.05 percentage point, and FeO contents decline 0.17 percentage point.
Embodiment 2 is sintered using low calcium desulfurizing slag of hot metal of the present invention
Still choose particulate material of the particle diameter less than 8mm and the present invention is made for substituting the low of part high-grade miberal powder in sintering
Calcium desulfurizing slag of hot metal, chemical constituent composition are shown in Table 1：
1 desulfurization slag chemical composition of table
| TFe | MgO | SiO2 | CaO | P | S | MFe |
| 50.29 | 3.30 | 4.42 | 20.50 | 0.11 | 1.49 | 25.86 |
Under the ratio with addition of 3%, compared with base period：Vertical sintering speed, usage factor have dropped 2.51 respectively,
2.08 percentage point；Sinter yield rate, drum strength rise 0.09,0.33 percentage point, under anti-wear index slightly has respectively
Drop, is 0.07 percentage point, and sinter granularmetric composition makes moderate progress, and average grain diameter rises 0.83%, and sinter technical indicator is equal
Make moderate progress.
From embodiment, using the method for the present invention, by the way that the miberal powder of low calcium desulfurizing slag of hot metal and high-quality is closed
The proportioning of reason, controls suitable sintering condition to be sintered, it is possible to increase sinter yield rate and drum strength, sintering character is more
It is good.The present invention effectively make use of discarded object low calcium desulfurizing slag of hot metal, alleviates environmental pressure, has saved production cost, has
Significant economic benefit.
Claims (5)
1. the Application way of low calcium desulfurizing slag of hot metal, it is characterised in that comprise the following steps：
Low calcium desulfurizing slag of hot metal is taken, is sintered with addition of the high-quality miberal powder of 90-99%；The low calcium desulfurizing slag of hot metal composition
Including：By weight percentage, TFe 50~60%, SiO21~6%, CaO 15~25%, MgO 1~5%, Al2O31~
5%.
2. the Application way of low calcium desulfurizing slag of hot metal according to claim 1, it is characterised in that：The high-quality miberal powder
For magnesium oxide-based desulfurizing agent or molten iron slag making desulfurizing agent.
3. the Application way of low calcium desulfurizing slag of hot metal according to claim 1, it is characterised in that：The low calcium molten iron takes off
The particle diameter of sulphur slag is 0~10mm.
4. the Application way of low calcium desulfurizing slag of hot metal according to claim 3, it is characterised in that：The low calcium molten iron takes off
The particle diameter of sulphur slag is 8mm.
5. the Application way of low calcium desulfurizing slag of hot metal according to claim 1, it is characterised in that：The sintering temperature is
1550~1600 DEG C, sintering time is 2~5min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711394772.8A CN108018404A (en) | 2017-12-21 | 2017-12-21 | The Application way of low calcium desulfurizing slag of hot metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711394772.8A CN108018404A (en) | 2017-12-21 | 2017-12-21 | The Application way of low calcium desulfurizing slag of hot metal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108018404A true CN108018404A (en) | 2018-05-11 |
Family
ID=62074371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711394772.8A Pending CN108018404A (en) | 2017-12-21 | 2017-12-21 | The Application way of low calcium desulfurizing slag of hot metal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108018404A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102978384A (en) * | 2012-12-24 | 2013-03-20 | 首钢总公司 | Method for using steel slags during sintering |
| CN104232885A (en) * | 2014-09-28 | 2014-12-24 | 四川德胜集团钒钛有限公司 | Method for blending ore of vanadium-titanium sintered ore |
| CN104328275A (en) * | 2014-09-28 | 2015-02-04 | 四川德胜集团钒钛有限公司 | Preparation method of vanadium-titanium sinter |
-
2017
- 2017-12-21 CN CN201711394772.8A patent/CN108018404A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102978384A (en) * | 2012-12-24 | 2013-03-20 | 首钢总公司 | Method for using steel slags during sintering |
| CN104232885A (en) * | 2014-09-28 | 2014-12-24 | 四川德胜集团钒钛有限公司 | Method for blending ore of vanadium-titanium sintered ore |
| CN104328275A (en) * | 2014-09-28 | 2015-02-04 | 四川德胜集团钒钛有限公司 | Preparation method of vanadium-titanium sinter |
Non-Patent Citations (1)
| Title |
|---|
| 李媛英: "《钒钛磁铁矿烧结中配加脱硫渣试验研究》", 《四川冶金》 * |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180511 |
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| WD01 | Invention patent application deemed withdrawn after publication |