CN1197119A - Modifying material for converter final slag and its prodn. tech. - Google Patents
Modifying material for converter final slag and its prodn. tech. Download PDFInfo
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- CN1197119A CN1197119A CN 97109079 CN97109079A CN1197119A CN 1197119 A CN1197119 A CN 1197119A CN 97109079 CN97109079 CN 97109079 CN 97109079 A CN97109079 A CN 97109079A CN 1197119 A CN1197119 A CN 1197119A
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- slag
- raw material
- cao
- modifying material
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Abstract
A material for modifying final slags of steel converter in order to increase the smelting point of final slags, protecting effect and response is prepared from light burnt MgO (50-80%), CaO (10-40%), C (5-15%) and rare-earth catalyst (1-2%) through mixing, grinding to fine powder less than 0.1 mm, mixing with water, granulating (5-50 mm), and baking at 100-200 deg.C.
Description
The present invention relates to the modifying material of steel-making converter finishing slag and its production method.
Current, the modification of steel-making converter finishing slag generally there are two kinds of methods.Method one: in slag, add unprocessed dolomite or light dolomite and light-burned MaO dry slag; Method two: in slag, add dry slags such as rhombspar, magnesia and coke respectively.The shortcoming of method one is MgO, the CaO height in the slag, and the main mine of slag does not change mutually, and the fusing point of slag does not improve, the furnace retaining weak effect.Can improve though the shortcoming of method two is the fusing point in the slag, the ore deposit phase composition changes, the adition process complexity, and speed of response is slow, and it is long to take the steel-making time.
The objective of the invention is to overcome the deficiency of above-mentioned prior art, a kind of simple and effective finishing slag modifying material and its producing and manufacturing technique are provided, thereby improve the fusing point and the viscosity of steel-making converter finishing slag.
The object of the present invention is achieved like this: finishing slag modifying material of the present invention, and its raw material is made up of light-burned MgO, CaO, C and rare earth catalyst, and the span of each raw material is: hydrocarbon burns MgO 50-80%, CaO10-40%, C 5-15%, catalyzer 1-2%.
Above-mentioned said raw material span, its optimum range is: light-burned MgO 55-70%, CaO 20-30%, C 8-12%, catalyzer 1%.
The producing and manufacturing technique of modifying material of the present invention is: each raw material that (1) is good with proportioning mixes the fine powder of wearing into below the 0.1m, mixes after perhaps each raw material being worn into the fine powder below the 0.1mm respectively; (2) fine powder that mixes is added the particle that water is made 5-50mm; (3) be finished product through 100-200 ℃ of drying kiln oven dry.
The invention has the advantages that raw material sources are wide, processing method is simple, and when using product of the present invention, it is convenient to add, and is swift in response with slag, can make the main ore deposit phase composition of slag become C3S and C2S, improves the fusing point and the viscosity of slag.
Now the present invention is further described.
Ultimate principle of the present invention is, when in the converter finishing slag, adding compositions such as MgO, CaO, C, can make it rapidly with slag in FeO, MnO, SiO, CaO, MgO etc. carry out physical-chemical reaction, forming main mineral phase structure is periclasite C3S and C2S, makes the fusing point and the viscosity raising of slag.Except by the above-mentioned processing method operation, the moisture that should also be noted that the control finished product is in 2% when producing product of the present invention.When modifying material of the present invention was used in 90t converter and 250t converter, its using method was: after having gone out steel, stay the part slag, add an amount of modifying material and slag reacts rapidly from feed bin, shake converter, the modification slag evenly is bonded at the backup lining brick surface, and the sampling analysis result is:
| ????SiO2 | ???CaO | ???MgO | ???FeO | Basicity | |
| Finishing slag | ??13.24 | ??42.98 | ??8.40 | ??16.55 | ??3.24 |
| The modification slag | ??14.02 | ??44.12 | ??10.90 | ??12.58 | ??3.15 |
From sampling result as can be seen, after adding modifying material, the MgO in the slag improves 2.5%, and FeO reduces by 4%, main ore deposit in the slag is by wustite 45-50%, C3S 30-35%, and C2S 10%, change C3S50-55% into, C2S 25-30% and wustite 10-15%, periclasite 5-6%.
Claims (3)
1, a kind of steel-making converter finishing slag modifying material, it is characterized in that: raw material is made up of light-burned MgO, CaO, C and rare earth catalyst, and the span of each raw material is: light-burned MgO 50-80%, CaO 10-40%, C 5-15%, catalyzer 1-2%.
2, steel-making converter finishing slag modifying material according to claim 1 is characterized in that: above-mentioned said raw material span, its optimum range is: light-burned MgO 55-70%, CaO 20-30%, C 8-12%, catalyzer 1%.
3, a kind of producing and manufacturing technique of steel-making converter finishing slag modifying material is characterized in that: each raw material that (1) is good with proportioning mixes the fine powder of wearing into below the 0.1mm, mixes after perhaps each raw material being worn into the fine powder below the 0.1mm respectively; (2) fine powder that mixes is added the particle that water is made 5-50mm; (3) be finished product through 100-200 ℃ of drying kiln oven dry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97109079 CN1197119A (en) | 1997-04-18 | 1997-04-18 | Modifying material for converter final slag and its prodn. tech. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97109079 CN1197119A (en) | 1997-04-18 | 1997-04-18 | Modifying material for converter final slag and its prodn. tech. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1197119A true CN1197119A (en) | 1998-10-28 |
Family
ID=5170897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97109079 Pending CN1197119A (en) | 1997-04-18 | 1997-04-18 | Modifying material for converter final slag and its prodn. tech. |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1197119A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100396799C (en) * | 2005-09-20 | 2008-06-25 | 孟宪民 | Synthetic adding ball and its preparing method |
| CN101603117B (en) * | 2008-06-12 | 2011-06-15 | 攀钢集团钢铁钒钛股份有限公司 | Slag modifier and preparation method and using method thereof |
| CN102296141A (en) * | 2010-06-25 | 2011-12-28 | 鞍钢股份有限公司 | Converter steelmaking final slag modifier and use method thereof |
| CN102586536A (en) * | 2012-03-27 | 2012-07-18 | 辽宁科技大学 | Converter steel-making final slag modifier utilizing magnesite tailings to serve as raw material and production method thereof |
| CN104060023A (en) * | 2013-09-09 | 2014-09-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Steel making final slag adjustment and preparation method and application method thereof |
| CN104131130A (en) * | 2014-07-17 | 2014-11-05 | 攀钢集团西昌钢钒有限公司 | Converter final-slag modifier and use thereof |
| CN101760579B (en) * | 2008-12-24 | 2015-04-01 | 攀钢集团钢铁钒钛股份有限公司 | Fettling method for vanadium extracting converter |
-
1997
- 1997-04-18 CN CN 97109079 patent/CN1197119A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100396799C (en) * | 2005-09-20 | 2008-06-25 | 孟宪民 | Synthetic adding ball and its preparing method |
| CN101603117B (en) * | 2008-06-12 | 2011-06-15 | 攀钢集团钢铁钒钛股份有限公司 | Slag modifier and preparation method and using method thereof |
| CN101760579B (en) * | 2008-12-24 | 2015-04-01 | 攀钢集团钢铁钒钛股份有限公司 | Fettling method for vanadium extracting converter |
| CN102296141A (en) * | 2010-06-25 | 2011-12-28 | 鞍钢股份有限公司 | Converter steelmaking final slag modifier and use method thereof |
| CN102296141B (en) * | 2010-06-25 | 2013-11-06 | 鞍钢股份有限公司 | Converter steelmaking final slag modifier and use method thereof |
| CN102586536A (en) * | 2012-03-27 | 2012-07-18 | 辽宁科技大学 | Converter steel-making final slag modifier utilizing magnesite tailings to serve as raw material and production method thereof |
| CN104060023A (en) * | 2013-09-09 | 2014-09-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Steel making final slag adjustment and preparation method and application method thereof |
| CN104060023B (en) * | 2013-09-09 | 2016-04-13 | 攀钢集团攀枝花钢铁研究院有限公司 | Steel-making final slag regulator and preparation method thereof and using method |
| CN104131130A (en) * | 2014-07-17 | 2014-11-05 | 攀钢集团西昌钢钒有限公司 | Converter final-slag modifier and use thereof |
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