CN103160641A - Foaming agent used in electric furnace steelmaking oxygen fusion - Google Patents
Foaming agent used in electric furnace steelmaking oxygen fusion Download PDFInfo
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- CN103160641A CN103160641A CN 201110412174 CN201110412174A CN103160641A CN 103160641 A CN103160641 A CN 103160641A CN 201110412174 CN201110412174 CN 201110412174 CN 201110412174 A CN201110412174 A CN 201110412174A CN 103160641 A CN103160641 A CN 103160641A
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- whipping agent
- foaming agent
- slag
- oxygen
- electric furnace
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention relates to a foaming agent used in electric furnace steelmaking oxygen fusion. The foaming agent comprises the components of, by weight, 19-72% of limestone, 23-76% of coke powder, 4-10% of iron scale, and balance of SiO2 and impurities. The foaming agent has the advantages of rich resource, simple production process, low cost, and low addition amount. The formed foamy slag is stable and durable, and an energy-saving effect is substantial.
Description
Technical field
The present invention relates to the molten oxygen whipping agent of a kind of Electric furnace steel making, belong to the Electric furnace steel making catalyst field.
Background technology
Along with the increase of electrosmelting stainless steel process raw material heavy burder ratio, the application of Foamed Slag Technique is more aobvious significant, can solve well the series of problems such as the power consumption that exists in the smelting mother liquor of stainless steel from electric furnace process is high, smelting cycle is long, refractory consumption is large.For electrosmelting stainless steel making foamed slag process, except requiring slag to have good foam performance, also needing has enough foaming sources of the gas, and from the stainless practical situation of electrosmelting, reaction between slag, oxygen blast or spray carbon all can produce certain CO gas as the foaming source of the gas.
Electric-arc furnace steelmaking foamy slag smelting operation both at home and abroad at present is to adopt " oxygen enrichment, spray carbon, long arc " trinity combine operations in the molten oxygen phase mostly.In some advanced national multiple gun winding-up oxygen, automatic pilots of coke powder and flux of adopting of steel of producing; Imbedding according to electric arc of also having causes in slag that noise descends, and adopts microcomputer technology to control spray carbon amount, and electric arc is imbedded in slag automatically, and these have all obtained good effect.But above-mentioned all foamy slag operating procedures only limit to melt later stage and oxidation early stage.
Summary of the invention
The object of the invention is to base oneself upon the existing weaponry and equipment level of the most electric furnaces of China's our province and the urgency of economize on electricity, consider simultaneously resources supplIes and the economic principle of China, for electric-arc furnace steelmaking provides molten oxygen phase whipping agent.This whipping agent should be easy to produce, and technique is simple, and aboundresources is with low cost.
The invention provides the molten oxygen phase of a kind of electric-arc furnace steelmaking uses whipping agent, consists of (weight): Wingdale 21-70%, and coke powder 25-74%, iron scale 5-10%, all the other are a small amount of SiO
2And impurity.The granularity of this whipping agent (mm) is: Wingdale 8～10, coke powder 5～8, iron scale 0.5～3.
Whipping agent of the present invention forms the reasons are as follows of determining:
1, foamy slag is in fact the slag that contains equably a large amount of tiny bubbles, the key that adopts whipping agent is to make slag produce enough gas volumes, for the carbon content that guarantees molten steel in smelting process can be owing to not adding whipping agent to descend, whipping agent of the present invention selects calcium carbonate and coke powder as chief component.CaCO
3And between coke powder, reaction is the main source that whipping agent self produces CO, and they self thermolysis form active CaO can the stable foam slag.The present invention determines that molten oxygen phase whipping agent calcium carbonate and coke powder are following composition: Wingdale 19-72%, coke powder 23-76%.
2, according to using the oxygen situation, will allocate a certain amount of iron scale in molten oxygen phase whipping agent, to improve the oxidisability of slag, the present invention determines that the add-on of iron scale is 4-10%.
Adopt whipping agent steel-making dissolved oxygen phase operating procedure of the present invention to be summarized as follows:
Lay a certain amount of lime at furnace bottom, add a certain amount of unprocessed dolomite and coke powder on the lime upper strata, add fast subsequently first to hang steel scrap, and energising.When the molten bath forms gradually, when electric arc is exposed gradually, add first whipping agent toward near the molten bath at electric arc place, and oxygen-blowing gun is placed near slagging district or slag interface, increase FeO content in slag, make bloating, electric arc is imbedded in slag burnt.Take the circumstances into consideration to add whipping agent according to the situation of submerged arc subsequently.First hangs scrap melting 70% left and right, should in time add people second and hang steel scrap, and along with the carrying out of decarburizing reaction, whipping agent stops adding, until the oxidation sample is taken away.After the oxidation sample is taken away, add the last batch of whipping agent toward the molten bath.Make electric arc continue to imbed in slag and burn, until skim, complete molten oxygen phase foamy slag operation.
Molten oxygen phase whipping agent add-on is calculated by the metal charge of packing into, and metal charge per ton consumes whipping agent 4～5kg, and the whipping agent add-on is both relevant with quantity with the kind of furnace bottom paver, and is also relevant with oxygen consumption and operating conditions.
Foaming agent for smelting steel of the present invention is applicable to ordinary arc furnace, electric arc ladle refining furnace, direct current electric arc furnace and ultra-high power electric arc furnace.
Embodiment
16 tons of electrosmeltings of embodiment
The whipping agent component is: Wingdale 30%, granularity 8mm coke powder 65%, granularity 6mm; Iron scale 4%, granularity 1mm; All the other are a small amount of SiO
2And impurity;
The whipping agent that adopts said components of the present invention to make on 6 tons of electric furnaces carries out the dissolved oxygen phase and smelts.A certain amount of lime of place mat, unprocessed dolomite and coke powder at the bottom of the charging forehearth.After power transmission 20 minutes, adopt 0.4MPa oxygen to press oxygen blast to flux.Then add molten oxygen whipping agent, in stove, the whipping agent immediate reaction produces foam, electrode is all imbedded in slag burnt.The consumption of whipping agent is 5 kg/tonnes of steel, adds in batches.Make the spumescence slag remain to pure boiling period.The complete reduction of skimming of oxidation.
215 tons of electrosmeltings of embodiment
The whipping agent component is: Wingdale 50%, granularity 9mm; Coke powder 40%, granularity 7mm; Iron scale 8%, granularity 2mm; All the other are a small amount of SiO
2And impurity;
The whipping agent that adopts said components of the present invention to make on 15 tons of electric furnaces carries out the dissolved oxygen phase and smelts.A certain amount of lime of place mat, unprocessed dolomite and coke powder at the bottom of the charging forehearth.After power transmission 25 minutes, adopt 0.5MPa oxygen to press oxygen blast to flux.Then add molten oxygen whipping agent, in stove, the whipping agent immediate reaction produces foam, electrode is all imbedded in slag burnt.The consumption of whipping agent is 5 kg/tonnes of steel, adds in batches.Make the spumescence slag remain to pure boiling period.The complete reduction of skimming of oxidation.
Claims (2)
1. an Electric furnace steel making melts the oxygen whipping agent, it is characterized in that containing (weight): Wingdale 19-72%, and coke powder 23-76%, iron scale 4-10%, all the other are a small amount of SiO
2And impurity;
2. molten oxygen whipping agent according to claim 1, is characterized in that the granularity (mm) of this whipping agent is: Wingdale 7-10, coke powder 5-9, iron scale 0.6-3.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110412174 CN103160641A (en) | 2011-12-13 | 2011-12-13 | Foaming agent used in electric furnace steelmaking oxygen fusion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110412174 CN103160641A (en) | 2011-12-13 | 2011-12-13 | Foaming agent used in electric furnace steelmaking oxygen fusion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103160641A true CN103160641A (en) | 2013-06-19 |
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ID=48584175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110412174 Pending CN103160641A (en) | 2011-12-13 | 2011-12-13 | Foaming agent used in electric furnace steelmaking oxygen fusion |
Country Status (1)
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| CN (1) | CN103160641A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106222359A (en) * | 2016-08-20 | 2016-12-14 | 中天钢铁集团有限公司 | A kind of electric furnace furnace retaining maneuver |
| CN107201423A (en) * | 2017-06-23 | 2017-09-26 | 什邡市三裕锻件有限公司 | A kind of use calcium carbonate replaces the arc furnace steelmaking process of calcium oxide making foamed slag |
| CN108384919A (en) * | 2018-01-16 | 2018-08-10 | 朱荣 | A kind of foaming agent for smelting steel in electric arc furnace and its application method |
| CN114134282A (en) * | 2021-11-02 | 2022-03-04 | 北京首钢股份有限公司 | Stable submerged arc heating method for non-deoxidized ladle refining |
-
2011
- 2011-12-13 CN CN 201110412174 patent/CN103160641A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106222359A (en) * | 2016-08-20 | 2016-12-14 | 中天钢铁集团有限公司 | A kind of electric furnace furnace retaining maneuver |
| CN106222359B (en) * | 2016-08-20 | 2018-06-01 | 中天钢铁集团有限公司 | A kind of electric furnace furnace retaining maneuver |
| CN107201423A (en) * | 2017-06-23 | 2017-09-26 | 什邡市三裕锻件有限公司 | A kind of use calcium carbonate replaces the arc furnace steelmaking process of calcium oxide making foamed slag |
| CN108384919A (en) * | 2018-01-16 | 2018-08-10 | 朱荣 | A kind of foaming agent for smelting steel in electric arc furnace and its application method |
| CN114134282A (en) * | 2021-11-02 | 2022-03-04 | 北京首钢股份有限公司 | Stable submerged arc heating method for non-deoxidized ladle refining |
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| C05 | Deemed withdrawal (patent law before 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130619 |