CN102010935A - Desulphurization powder used in steel ladle powder injection refining process and production method thereof - Google Patents
Desulphurization powder used in steel ladle powder injection refining process and production method thereof Download PDFInfo
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- CN102010935A CN102010935A CN 201010599483 CN201010599483A CN102010935A CN 102010935 A CN102010935 A CN 102010935A CN 201010599483 CN201010599483 CN 201010599483 CN 201010599483 A CN201010599483 A CN 201010599483A CN 102010935 A CN102010935 A CN 102010935A
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Abstract
The invention provides a desulphurization powder used in steel ladle powder injection refining process and a production method thereof. The powder injection desulphurization powder comprises the following components by weight percent: 75-90% of CaO, 0-5% of SiO2, 0-8% of MgO, 0-7% of CaF2, 0-0.035% of S, and the balance of impurities. The production method comprises: three-level common metallurgical lime and fluorite ore fines FF-95 are mechanically mixed at the matching ratio of 16: 1; and then a pulverizing mill is adopted to grind the mixture to obtain powder with the particle size of 100-200. The invention has the advantages that the steel ladle powder injection refining process can meet the demand of different steel types with different sulphur contents by adopting the desulphurization powder, the usage amount of desulphurization powder is different, and desulphurization rate is 20-80%; a low-cost short flow simplex process production can be directly carried out, and a duplex process also can be formed by combining the simplex process with other refining means; and the usage amount of the powder is small, the cost is low, and the desulphurization period is short, thus batch production can be carried out easily.
Description
Technical field
The invention belongs to technical field of steelmaking and refining, particularly relate to a kind of desulfurization powder that is used for the steel spraying powder refinery practice, be applicable to that steel spraying powder desulfurizing and refining process controls the sulphur content in the steel.
Background technology
Except that indivedual steel grades, sulphur is harmful element in steel, makes steel produce the resistance to corrosion of hot-short, as to reduce steel impelling strength, reduction steel, and therefore, the steel grade of different stage has proposed different requirements to the sulphur content in the steel.
In present smelting iron and steel CONTROL PROCESS, sulphur content great majority in the steel adopt desulfurizing iron pretreatment technology and ladle furnace refining technology that the sulphur content in the steel is controlled, use separately or use jointly the sulphur content in the steel is controlled according to these two kinds of technologies of difference that sulphur content in the steel requires, the refinery practice sweetener is comparatively single; Though there is steel spraying powder desulfurizing and refining equipment in domestic indivedual steel mills,, do not form mature and stable production technique because a variety of causes usage ratio of equipment such as production process control instability and sweetening effectiveness fluctuation are lower.
Steel spraying powder is mature and stable to be applied in the practice in order to make, the effect of performance steel spraying powder, and this patent provides a kind of desulfurization powder that is used for the steel spraying powder refinery practice.
Summary of the invention
The purpose of this invention is to provide a kind of desulfurization powder and production method that is used for the steel spraying powder refinery practice, satisfied the stable of steel spraying powder refinery practice and sweetening effectiveness, make the variation of desulfurizing and refining operational path.
Ladle desulfurization pulvis composition of the present invention consists of by weight percentage: CaO:75%-90%, and SiO2:0%-5%, MgO:0%-8%, CaF2:0%-7%, S:0%-0.035%, all the other are impurity.
This powder injection desulphurization pulvis adopts three grades of common metallurgy limes and fluorite fine ore FF-95 to carry out mechanically mixing, and the proportioning ratio of the two is 16: 1, and adopting pulverizing mill to grind to form granularity again is 100-200 purpose pulvis.
Advantage of the present invention:
After steel spraying powder refining station adopts this desulfurization powder, can realize the stable control of sulphur content in the steel, satisfy the demand of different stage steel grade, for initial sulphur content at 0.0150%～0.0250% o'clock, sulphur content can be controlled in 0.0075%～0.0125%, desulfurization degree is 20%～50%; At 0.005%～0.012% o'clock, sulphur content can be controlled to 0.0010%～0.0040% for the sulphur content that enters the station, desulfurization degree is 50%～80%.
Steel spraying powder adopt after this desulfurization powder stably manufactured can according to the desulfurization of actual production steel grade needs steel spraying powder can with other the high-level steel grade of refining means formation duplex linked together explained hereafter, also can be directly and converter and casting machine collocation carry out low cost and lack the production of flow process fast pace.
Advantages such as steel spraying powder adopts this desulfurization powder to carry out desulfurization to have that consumption is little, cost is low, the desulfurization cycle is short.
This desulfurization powder raw material is easy to get, processes simple, is easy to produce in batches.
Embodiment
Embodiment 1:
Steel grade Q345C, steel spraying powder desulfurization powder of the present invention adopts 87% three grades of metallurgy limes and 96% fluorite fine ore to mix, the proportioning ratio of the two is 16: 1, grinding to form granularity again is 100 purpose desulfurization powders, adopts this steel spraying powder desulfurization powder to carry out the steel spraying powder refining, and the pulvis consumption is the 3kg/t steel, the sulphur content that enters the station was at 0.020% o'clock, sulphur content can be controlled to 0.012%, desulfurization degree reaches 40%, and the composition of the steel spraying powder desulfurization powder of employing is as shown in table 1.
The refining of table 1 steel spraying powder is used the desulfurization powder composition by weight percentage, %
Embodiment 2:
Steel grade X65, steel spraying powder desulfurization powder of the present invention adopts 94% three grades of metallurgy limes and 98% fluorite fine ore to mix, the proportioning ratio of the two is 16: 1, grinding to form granularity again is 160 purpose desulfurization powders, adopts this steel spraying powder desulfurization powder to carry out the steel spraying powder refining, and the pulvis consumption is the 5kg/t steel, the sulphur content that enters the station was at 0.010% o'clock, sulphur content can be controlled to 0.003%, desulfurization degree reaches 70%, and the composition of the steel spraying powder desulfurization powder of employing is as shown in table 2.
The refining of table 2 steel spraying powder is used the desulfurization powder composition by weight percentage, %
Claims (2)
1. a desulfurization powder that is used for the steel spraying powder refinery practice is characterized in that, the desulfurization powder composition consists of by weight percentage: CaO:75%-90%, SiO
2: 0%-5%, MgO:0%-8%, CaF
2: 0%-7%, S:0%-0.035%, all the other are impurity.
2. produce the desulfurization powder of steel spraying powder refinery practice as claimed in claim 1, it is characterized in that: adopt three grades of common metallurgy limes and fluorite fine ore FF-95 to carry out mechanically mixing, the proportioning ratio of the two is 16: 1, and adopting pulverizing mill to grind to form granularity again is 100-200 purpose pulvis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010599483 CN102010935A (en) | 2010-12-13 | 2010-12-13 | Desulphurization powder used in steel ladle powder injection refining process and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010599483 CN102010935A (en) | 2010-12-13 | 2010-12-13 | Desulphurization powder used in steel ladle powder injection refining process and production method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN102010935A true CN102010935A (en) | 2011-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010599483 Pending CN102010935A (en) | 2010-12-13 | 2010-12-13 | Desulphurization powder used in steel ladle powder injection refining process and production method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102212651A (en) * | 2011-06-02 | 2011-10-12 | 首钢总公司 | Steel ladle powder injection desulfuration refining process for low-sulfur steel production |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1030115A (en) * | 1996-07-15 | 1998-02-03 | Nippon Steel Corp | Desulfurizing agent and desulfurizing method using the same |
| CN101104874A (en) * | 2006-08-24 | 2008-01-16 | 首钢总公司 | Method for processing refined-smelting ladle furnace deep desulfurization finally slag |
| CN101392310A (en) * | 2008-11-04 | 2009-03-25 | 首钢总公司 | Sulfur-fixing agent for hot metal pretreatment of magnesium injection and deep desulphurization and desulphurization method thereof |
| CN101532074A (en) * | 2009-04-14 | 2009-09-16 | 中冶实久建设有限公司 | A blowing method desulfurizing agent and preparation method thereof |
-
2010
- 2010-12-13 CN CN 201010599483 patent/CN102010935A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1030115A (en) * | 1996-07-15 | 1998-02-03 | Nippon Steel Corp | Desulfurizing agent and desulfurizing method using the same |
| CN101104874A (en) * | 2006-08-24 | 2008-01-16 | 首钢总公司 | Method for processing refined-smelting ladle furnace deep desulfurization finally slag |
| CN101392310A (en) * | 2008-11-04 | 2009-03-25 | 首钢总公司 | Sulfur-fixing agent for hot metal pretreatment of magnesium injection and deep desulphurization and desulphurization method thereof |
| CN101532074A (en) * | 2009-04-14 | 2009-09-16 | 中冶实久建设有限公司 | A blowing method desulfurizing agent and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102212651A (en) * | 2011-06-02 | 2011-10-12 | 首钢总公司 | Steel ladle powder injection desulfuration refining process for low-sulfur steel production |
| CN102212651B (en) * | 2011-06-02 | 2013-04-17 | 首钢总公司 | Steel ladle powder injection desulfuration refining process for low-sulfur steel production |
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Application publication date: 20110413 |