CN102296150B - Submerged arc foaming refining agent and preparation method thereof - Google Patents
Submerged arc foaming refining agent and preparation method thereof Download PDFInfo
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- CN102296150B CN102296150B CN 201110235795 CN201110235795A CN102296150B CN 102296150 B CN102296150 B CN 102296150B CN 201110235795 CN201110235795 CN 201110235795 CN 201110235795 A CN201110235795 A CN 201110235795A CN 102296150 B CN102296150 B CN 102296150B
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- submerged arc
- refining agent
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- foaming
- slag
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Abstract
The invention discloses a submerged arc foaming refining agent and a preparation method thereof. The submerged arc foaming refining agent comprises the following raw materials by weight: 10 to 30 of high calcium white ash, 30 to 60 of calcium carbonate, 10 to 20 AD powder, 10 to 30 of barium carbonate, 4 to 10 of fused magnesite, 10 to 30 of dolomite, 4 to 8 of sodium lignosulfonate, 2 to 4 of paper pulp waste liquid and 3 to 6 of water. According to the invention, a basic slag system having capability of storing bubbles is employed and is compounded with surface active substances capable of adjusting slag viscosity, surface tension and solid phase particles; raw materials are reasonably collocated, the basic slag system is guaranteed to release gas and form compounds with a plurality of fine pores in polymers so as to obtain a foaming state through a pyrolysis reaction, the thickness of a slag layer is increased, and continuous stabilization of the slag layer is realized, thereby reducing radiation of arc to refractory materials and improving the heating effect of arc; further, a proper amount of a deoxidation and desulphurization promoter is added into the basic slag system, and therefore, the content of oxides in steel is reduced, there is no increase of carbon and silicon, a good adsorption and inclusion effect is obtained, time for refining is shortened, and the service life of steel ladles is prolonged.
Description
Technical field
The present invention relates to metallurgical class, be used for the free-floride of LF stove refining, carbon-free, high alkalinity submerged arc foaming refining agent and preparation method thereof.
Background technology
Submerged arc foaming refining agent, generally refer in LF stove refining process, adopt electric arc in ladle, to heat, realize being rapidly heated, adjusting steel grades, coordinate steel-making and continuous casting rhythm, play in time slagging, continual and steady foaming, during heated by electrodes, have all the time good submerged arc effect.Reduce since the radiation of electric arc to the erosion of ladle lining, improve ladle work-ing life.Solve simultaneously the gas that the impact because of the electric arc heat produces and enter molten steel, play the effect of purify hot metal.Adopt submerged arc foaming refining agent at LF stove refining process for this reason, solve the above-mentioned problem that occurs.But it is base-material that traditional submerged arc slag generally adopts carbonate, reaches with addition of materials such as carbide of calcium, Calcium Fluoride (Fluorspan), silicon carbide basic slag is expanded, and improves thickness of slag layer and reaches the purpose of submerged arc refining.By long-term use checking, and the trend of present steel industry variety steel, find that there are many defectives in original slag system: 1, foam life is short, foaming efficient is low; 2, adopt to fluoridize under the calcification slag foaming high temperature and easily produce volatile matter, the foam lasting effect is unstable, and corrodes furnace lining, reduces ladle work-ing life, also contaminate environment; Although 3, carbide of calcium, silicon carbide can address the above problem, pollute molten steel in the meeting of use of part steel grade, easily carburetting.Can not satisfy the demand of exploitation Ultra-low carbon variety steel; 4, single submerged arc slag making is to deoxidation, and sweetening effectiveness is very little.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of free-floride, and is carbon-free, submerged arc foaming refining agent of high alkalinity and preparation method thereof.
Technical scheme of the present invention is: a kind of submerged arc foaming refining agent, it is made by the raw material of following parts by weight: high calcium lime 10-30, calcium carbonate 30-60, AD powder 10-20, barium carbonate 10-30, electrosmelted magnesite clinker 4-10, rhombspar 10-30, sodium lignosulfonate 4-8, spent pulping liquor 2-4, water 3-6.
Described submerged arc foaming refining agent is preferably made by the raw material of following parts by weight: high calcium lime 15-20, calcium carbonate 40-50, AD powder 12-18, barium carbonate 15-20, electrosmelted magnesite clinker 5-8, rhombspar 15-20, sodium lignosulfonate 5-7, spent pulping liquor 2-3, water 4-6.
Described submerged arc foaming refining agent, optimum by being made by the raw material of following parts by weight: high calcium lime 18, carbonic acid Ca45, AD powder 15, barium carbonate 18, electrosmelted magnesite clinker 6, rhombspar 18, sodium lignosulfonate 6, spent pulping liquor 3, water 5.
The preparation method of described submerged arc foaming refining agent: high calcium lime, calcium carbonate, AD powder, barium carbonate, electrosmelted magnesite clinker, ground dolomite are ground to the 120-150 order; after the mixing and stirring; use disk pelletizing mechanism grain; spray water, sodium lignosulfonate and spent pulping liquor in the pelletization; after in the disk pelletizing machine, granulating, under 400-500 ℃ condition, dry.
The invention has the beneficial effects as follows: the invention provides a kind of free-floride, carbon-free, high alkalinity submerged arc foaming refining agent.Its feature of this product is in the use principle according to this product, selects to have the basic slag system of storage bubble ability, and composite again have adjustment slag viscosity, surface tension, a surfactant of solid phase particles.Through raw-material reasonably combined, guaranteeing that basic slag system passes through high-temperature decomposition reaction, discharge gas, and in polymkeric substance, form multiporous compound and form spumescence, increase thickness of slag layer and continual and steady, with reach reduce electric arc to the radiation of refractory materials, improve the electric-arc heating effect.In basic slag system, add in addition an amount of deoxidation, desulfurization promotor, reduce oxide content in the steel, and not carburetting, do not increase silicon, absorption be mingled with effective, shorten refining time, improve ladle work-ing life.
High calcium lime in the raw material of the present invention can improve basicity of slag, improves sweetening effectiveness, can increase the granule content in the foam by the refractory grain of lime in addition, improves the surface tension of foam, continues the foam time; Calcium carbonate is main foaming substance in slag system; The AD powder is the high reactivity aluminium sesquioxide, improves oxonium ion activity in the slag, and the reactive metal AL in the component has improved the activity of sulphur in the metal, reduces oxygen gesture in the slag, has reduced the activity of Oxygen in Metals, can promote effectively that desulphurization reaction carries out; The barium carbonate solubility promoter reduces the slag system fusing point, and strong desulphurizing activated material decomposes generation gas and continues favourable to foam under the high temperature; Rhombspar is the carbonate material, and pyrolytic decomposition produces gas and improves depth of foam, and magnesium can be protected furnace lining in addition, and electrosmelted magnesite clinker has stable high-temperature performance, and solid matter is many in slag, can protect furnace lining, and continues favourable to foam; Spent pulping liquor tackiness agent and self are again organic foaming substances, and foaming effect is had promoter action.
The present invention adopts the carbonate raw material of high-quality to be allocated as base-material through rationally, make tackiness agent with addition of activated alumina, magnesium oxide and organic foaming substance, the submerged arc foaming refining agent of making, change slag slagging ability with fast and stable, being mingled with the more former slag system of ability in the absorption steel is significantly improved, adjust basicity of slag, prevent rephosphorization of molten steel, possesses simultaneously strong diffusive deoxidation, desulfurizing function, and do not pollute molten steel, not carburetting, the refining of suitable various steel grades is used, particularly high-quality Ultra-low carbon or low-silicon steel kind.2, this product adopts carbonate raw material to produce source of the gas by the at high temperature decomposition reaction of material, has namely increased reaction interface and the ascent rate of molten steel and inclusion, makes again the formation of foamy slag and continues to be guaranteed.3, this product adopts floride-free, carbon-free basic slag system, by raw-material reasonably combined, guaranteeing slag fusing point, viscosity, surface tension, foaming height and in the time length, do not corroding furnace lining, do not pollute molten steel, really play the work-ing life of improving refractory materials, improve arc efficiency, shorten refining time, under the effect of allocating active aluminum into, play efficient deoxidation, the effect of desulfurization five in one.
Embodiment
Embodiment 1
A kind of submerged arc foaming refining agent, it is made by the raw material of following parts by weight: high calcium lime 30 kg, calcium carbonate 60 kg, AD powder 20 kg, barium carbonate 30 kg, electrosmelted magnesite clinker 10 kg, rhombspar 30 kg, sodium lignosulfonate 8 kg, spent pulping liquor 4 kg, water 6 kg.
The preparation method of submerged arc foaming refining agent; high calcium lime, calcium carbonate, AD powder, barium carbonate, electrosmelted magnesite clinker, ground dolomite are ground to 150 orders; after the mixing and stirring; use disk pelletizing mechanism grain; spray water, sodium lignosulfonate and spent pulping liquor in the pelletization; after in the disk pelletizing machine, granulating, under 400 ℃ condition, dry.
Embodiment 2
A kind of submerged arc foaming refining agent, it is made by the raw material of following parts by weight: high calcium lime 10 kg, calcium carbonate 30 kg, AD powder 10 kg, barium carbonate 10 kg, electrosmelted magnesite clinker 4 kg, rhombspar 10 kg, sodium lignosulfonate 4 kg, spent pulping liquor 2 kg, water 3 kg.
The preparation method of submerged arc foaming refining agent; high calcium lime, calcium carbonate, AD powder, barium carbonate, electrosmelted magnesite clinker, ground dolomite are ground to 130 orders; after the mixing and stirring; use disk pelletizing mechanism grain; spray water, sodium lignosulfonate and spent pulping liquor in the pelletization; after in the disk pelletizing machine, granulating, under 450 ℃ condition, dry.
Embodiment 3
A kind of submerged arc foaming refining agent, it is made by the raw material of following parts by weight: high calcium lime 15 kg, calcium carbonate 40 kg, AD powder 12 kg, barium carbonate 15 kg, electrosmelted magnesite clinker 5 kg, rhombspar 15 kg, sodium lignosulfonate 5 kg, spent pulping liquor 2 kg, water 4 kg.
The preparation method of submerged arc foaming refining agent; high calcium lime, calcium carbonate, AD powder, barium carbonate, electrosmelted magnesite clinker, ground dolomite are ground to 150 orders; after the mixing and stirring; use disk pelletizing mechanism grain; spray water, sodium lignosulfonate and spent pulping liquor in the pelletization; after in the disk pelletizing machine, granulating, under 460 ℃ condition, dry.
Embodiment 4
A kind of submerged arc foaming refining agent, it is made by the raw material of following parts by weight: high calcium lime 20 kg, calcium carbonate 50 kg, AD powder 18 kg, barium carbonate 20 kg, electrosmelted magnesite clinker 8 kg, rhombspar 20 kg, sodium lignosulfonate 7 kg, spent pulping liquor 3 kg, water 6 kg.
The preparation method of submerged arc foaming refining agent; high calcium lime, calcium carbonate, AD powder, barium carbonate, electrosmelted magnesite clinker, ground dolomite are ground to 140 orders; after the mixing and stirring; use disk pelletizing mechanism grain; spray water, sodium lignosulfonate and spent pulping liquor in the pelletization; after in the disk pelletizing machine, granulating, under 480 ℃ condition, dry.
Embodiment 5
A kind of submerged arc foaming refining agent, it is made by the raw material of following parts by weight: high calcium lime 18 kg, carbonic acid Ca45 kg, AD powder 15 kg, barium carbonate 18 kg, electrosmelted magnesite clinker 6 kg, rhombspar 18 kg, sodium lignosulfonate 6 kg, spent pulping liquor 3 kg, water 5 kg.
The preparation method of submerged arc foaming refining agent; high calcium lime, calcium carbonate, AD powder, barium carbonate, electrosmelted magnesite clinker, ground dolomite are ground to 120 orders; after the mixing and stirring; use disk pelletizing mechanism grain; spray water, sodium lignosulfonate and spent pulping liquor in the pelletization; after in the disk pelletizing machine, granulating, under 500 ℃ condition, dry.
The moisture content of product of the present invention guarantees in 0.5%.The effective ingredient of product of the present invention is: CaO:20-60%, MgO:6-12%, Al
2O
3: 10-20%, BaO:6-20%, H
2O:0.3-0.5%, granularity 5-20mm, preferred size is 5-20mm, packing ratio is 2.0---2.8g/cm
3, preferred bulk specific gravity scope is 2.4---2.6 g/cm
3, the scope that granularity is suitable is 8---15mm.Product of the present invention is produced in low-carbon (LC), the low-silicon steel refining process in steel mill and is used, submerged arc height, time length, shortening refining time, desulfurization, deoxidation texts all are higher than the product of former use, create since the dawn of human civilization state-of-the-art record of this steel, and, not carburetting pollution-free to molten steel, not increasing silicon, the ladle bag improves more than 8 stoves on former basis age.
Among the present invention in the spent pulping liquor solid contents be 20-25%, available from emerging papermaking in the large Wei Town, Xinmi City.
Claims (4)
1. submerged arc foaming refining agent, it is characterized in that it is made by the raw material of following parts by weight: high calcium lime 10-30, calcium carbonate 30-60, AD powder 10-20, barium carbonate 10-30, electrosmelted magnesite clinker 4-10, rhombspar 10-30, sodium lignosulfonate 4-8, spent pulping liquor 2-4, water 3-6.
2. submerged arc foaming refining agent according to claim 1, it is characterized in that it is made by the raw material of following parts by weight: high calcium lime 15-20, calcium carbonate 40-50, AD powder 12-18, barium carbonate 15-20, electrosmelted magnesite clinker 5-8, rhombspar 15-20, sodium lignosulfonate 5-7, spent pulping liquor 2-3, water 4-6.
3. submerged arc foaming refining agent according to claim 1, it is characterized in that it is made by the raw material of following parts by weight: high calcium lime 18, carbonic acid Ca45, AD powder 15, barium carbonate 18, electrosmelted magnesite clinker 6, rhombspar 18, sodium lignosulfonate 6, spent pulping liquor 3, water 5.
4. such as the preparation method of the described submerged arc foaming refining agent of claim 1-3; it is characterized in that: high calcium lime, calcium carbonate, AD powder, barium carbonate, electrosmelted magnesite clinker, ground dolomite are ground to the 120-150 order; after the mixing and stirring; use disk pelletizing mechanism grain; spray water, sodium lignosulfonate and spent pulping liquor in the pelletization; after in the disk pelletizing machine, granulating, under 400-500 ℃ condition, dry.
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| CN 201110235795 CN102296150B (en) | 2011-08-17 | 2011-08-17 | Submerged arc foaming refining agent and preparation method thereof |
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| CN102296150B true CN102296150B (en) | 2013-05-01 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102747188B (en) * | 2012-07-18 | 2014-10-15 | 河南通宇冶材集团有限公司 | Fluorine-free carbon-free high-alkalinity submerged arc foaming refining agent and preparation method thereof |
| CN103333994B (en) * | 2013-04-03 | 2014-07-23 | 新疆八一钢铁股份有限公司 | Production technology of LF refinement submerged arc deoxidizing slag |
| CN109694938B (en) * | 2017-10-20 | 2020-09-01 | 鞍钢股份有限公司 | Deoxidizing alloying agent and preparation method thereof |
| CN108504820A (en) * | 2018-04-28 | 2018-09-07 | 河钢股份有限公司承德分公司 | A kind of LF refining method of Aluminum steel |
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| SU631540A1 (en) * | 1977-02-23 | 1978-11-05 | Днепропетровский Металлургический Институт | Synthetic slag for refining steel |
| CN1096823A (en) * | 1993-06-07 | 1994-12-28 | 北京科技大学 | The submerged arc slag of steel bucket finery |
| CN1254019A (en) * | 1999-11-30 | 2000-05-24 | 上海宝钢集团公司 | Ladle finer reduction foaming agent |
| CN101012489A (en) * | 2007-02-10 | 2007-08-08 | 赵佳云 | Pre-melting buried arc composite refining slag and method for making same |
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Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS544218A (en) * | 1977-06-10 | 1979-01-12 | Chiyomatsu Okamura | Desulfurizing agent for molten pig iron and steel |
| JPS5923812A (en) * | 1982-07-30 | 1984-02-07 | Japan Metals & Chem Co Ltd | Decarburizing method of iron and steel |
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2011
- 2011-08-17 CN CN 201110235795 patent/CN102296150B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU631540A1 (en) * | 1977-02-23 | 1978-11-05 | Днепропетровский Металлургический Институт | Synthetic slag for refining steel |
| CN1096823A (en) * | 1993-06-07 | 1994-12-28 | 北京科技大学 | The submerged arc slag of steel bucket finery |
| CN1254019A (en) * | 1999-11-30 | 2000-05-24 | 上海宝钢集团公司 | Ladle finer reduction foaming agent |
| CN101012489A (en) * | 2007-02-10 | 2007-08-08 | 赵佳云 | Pre-melting buried arc composite refining slag and method for making same |
| CN101016577A (en) * | 2007-02-15 | 2007-08-15 | 沈阳东北大学冶金技术研究所有限公司 | Passivation composite desulfurization powder |
| CN101314806A (en) * | 2007-05-31 | 2008-12-03 | 上海梅山钢铁股份有限公司 | Preliminary melting type vacuum smelting desulfurizing agent and preparation method thereof |
| CN102108432A (en) * | 2009-12-23 | 2011-06-29 | 上海梅山钢铁股份有限公司 | Submerged arc slag of refining furnace |
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