CN102071279A - Slag washing material for converter process production aluminum killed steel and preparation method thereof - Google Patents
Slag washing material for converter process production aluminum killed steel and preparation method thereof Download PDFInfo
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- CN102071279A CN102071279A CN 201010597949 CN201010597949A CN102071279A CN 102071279 A CN102071279 A CN 102071279A CN 201010597949 CN201010597949 CN 201010597949 CN 201010597949 A CN201010597949 A CN 201010597949A CN 102071279 A CN102071279 A CN 102071279A
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- slag charge
- slag
- raw material
- heating furnace
- wash heat
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- 239000000463 material Substances 0.000 title claims abstract description 178
- 239000002893 slag Substances 0.000 title claims abstract description 174
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 76
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 229910000655 Killed steel Inorganic materials 0.000 title claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 238000005406 washing Methods 0.000 title claims abstract 6
- 238000010438 heat treatment Methods 0.000 claims abstract description 114
- 239000002994 raw material Substances 0.000 claims abstract description 104
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 52
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 19
- 239000012535 impurity Substances 0.000 claims abstract description 15
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000002844 melting Methods 0.000 claims abstract description 8
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 7
- 230000008018 melting Effects 0.000 claims abstract description 7
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000000654 additive Substances 0.000 claims description 44
- 230000000996 additive effect Effects 0.000 claims description 44
- 239000000203 mixture Substances 0.000 claims description 40
- 239000004411 aluminium Substances 0.000 claims description 35
- 238000010891 electric arc Methods 0.000 claims description 23
- 239000000843 powder Substances 0.000 claims description 23
- 239000011777 magnesium Substances 0.000 claims description 22
- 239000007788 liquid Substances 0.000 claims description 18
- 229910052700 potassium Inorganic materials 0.000 claims description 18
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 17
- 239000011734 sodium Substances 0.000 claims description 16
- 229910052708 sodium Inorganic materials 0.000 claims description 16
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 14
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 14
- 239000004571 lime Substances 0.000 claims description 14
- 229910001570 bauxite Inorganic materials 0.000 claims description 8
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Inorganic materials [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 claims description 7
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 6
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 5
- 235000019738 Limestone Nutrition 0.000 claims description 5
- 239000006028 limestone Substances 0.000 claims description 5
- 229910001948 sodium oxide Inorganic materials 0.000 claims description 5
- 229910052656 albite Inorganic materials 0.000 claims description 4
- 239000010431 corundum Substances 0.000 claims description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 3
- 239000010433 feldspar Substances 0.000 claims description 3
- 238000013467 fragmentation Methods 0.000 claims description 3
- 238000006062 fragmentation reaction Methods 0.000 claims description 3
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 claims description 3
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 3
- 235000015320 potassium carbonate Nutrition 0.000 claims description 3
- CHWRSCGUEQEHOH-UHFFFAOYSA-N potassium oxide Chemical compound [O-2].[K+].[K+] CHWRSCGUEQEHOH-UHFFFAOYSA-N 0.000 claims description 3
- 229910001950 potassium oxide Inorganic materials 0.000 claims description 3
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 3
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 2
- CSSYLTMKCUORDA-UHFFFAOYSA-N barium(2+);oxygen(2-) Chemical compound [O-2].[Ba+2] CSSYLTMKCUORDA-UHFFFAOYSA-N 0.000 claims description 2
- 229940072033 potash Drugs 0.000 claims description 2
- 238000009749 continuous casting Methods 0.000 abstract description 7
- 238000002156 mixing Methods 0.000 abstract description 2
- 238000001179 sorption measurement Methods 0.000 abstract description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 2
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 238000005272 metallurgy Methods 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 88
- 239000010959 steel Substances 0.000 description 88
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 18
- 230000004927 fusion Effects 0.000 description 18
- 239000010439 graphite Substances 0.000 description 17
- 229910002804 graphite Inorganic materials 0.000 description 17
- 230000000694 effects Effects 0.000 description 16
- 238000012856 packing Methods 0.000 description 14
- 229910052717 sulfur Inorganic materials 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 7
- 238000007670 refining Methods 0.000 description 7
- 238000005266 casting Methods 0.000 description 5
- 239000010813 municipal solid waste Substances 0.000 description 5
- 239000000428 dust Substances 0.000 description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 description 4
- 239000011707 mineral Substances 0.000 description 4
- 235000010755 mineral Nutrition 0.000 description 4
- 238000003723 Smelting Methods 0.000 description 3
- 238000010079 rubber tapping Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052788 barium Inorganic materials 0.000 description 2
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229910001374 Invar Inorganic materials 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 230000003412 degenerative effect Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000010436 fluorite Substances 0.000 description 1
- 238000007499 fusion processing Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 235000014380 magnesium carbonate Nutrition 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 239000000320 mechanical mixture Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
Abstract
The invention discloses a slag washing material for converter process production aluminum killed steel and a preparation method thereof, and belongs to the technical field of metallurgy. The slag washing material comprises the following components in percentage by weight: 30 to 60 percent of CaO, 20 to 45 percent of Al2O3, 0 to 15 percent of SiO2, 0 to 15 percent of MgO, 0 to 15 percent of Al, 0 to 5.02 percent of BaO, 0 to 2 percent of K2O, 0 to 25 percent of Na2O, 0.001 to 1 percent of Mg, 0 to 1 percent of Ca and the balance of impurities of which the content is less than 5 weight percent. The preparation method comprises the following steps of: uniformly mixing a Ca-containing raw material, an Al2O3-containing raw material and a reducer; putting a part of or all slag materials into a heating furnace, heating and melting; adding the remaining slag materials when remaining materials exist; melting and stopping electrification; cooling; and performing physical crushing. The prepared slag washing material has higher Al2O3 inclusion adsorption capacity, can guarantee smooth pouring of continuous casting, and has uniform components, low melting points and high slag forming speed.
Description
Technical field
Metallurgical technology field of the present invention, particularly a kind of bof process are produced aluminium killed steel with wash heat material and preparation method thereof.
Background technology
Along with the user requires being growing more intense of more and more higher and market competition to steel quality, seek the attention that efficient is higher, cost is lower smelting technology technology more and more is subjected to domestic iron and steel enterprises in the steel smelting procedure.Carbon aluminium-killed steel is generally adopted " converter-LF refining-continuous casting " technical process both at home and abroad, this technology is long flow path not only, and there are certain problem in organization of production and management and running.
The LF refining process will consume slag making materials, refractory materials, Graphite Electrodes, Ar gas and electricity etc., causes resource, energy consumption big, problems such as cost height; And, also there is the carburetting of LF refining process in wherein part low-carbon (LC), low-silicon steel, increases problems such as silicon, after the LF refining, reduced the rate that is smelt of this type of steel; And only adopt the production of " converter-continuous casting " flow process, and ubiquity inclusion adsorption effect is poor, and continuous casting connects the problems such as the stove number is low, steel quality difference of watering.Therefore, these enterprises press for exploitation and can improve continuous casting and connect and to water the new simple Refining Technology of stove number and product made from steel quality.
In order to satisfy above-mentioned technical need, a series of wash heat material and wash heat technology have been developed in recent years, can partly substitute the LF refining furnace, the Chinese patent that is respectively ZL200910096625.1 and ZL200910096624.7 as the patent No. discloses a kind of general slag of heating that is used for converter steelmaking and has washed material and straight wash heat material and preparation method thereof and the using method of going up of heating, the patent No. is that the Chinese patent of ZL200510038233.1 discloses deoxidation in steel making-wash heat-external refining with effective integrated slag and using method, the patent No. is that the Chinese patent of ZL200810122755.3 discloses and contains outer " wash heat " desulfuration refining agent of BaO stove, and the patent No. is that the Chinese patent of ZL200710158648.1 discloses deslagging process of unrefined steel.
Above-mentioned patent generally adopts the part pre-melted slag, adopts afterwards the mode of mechanical mixture or pressure ball to use, and the wash heat material fusion temperature of this dual mode production all is higher than pre-melted slag, and sludging time (being fusing time) is lower than pre-melted slag, and all has the part dust.
In addition, also contain C, paraffin, BaCO in the batching
3With fluorite etc., the problem such as the ubiquity cigarette is big in the use procedure, dust is big, fluorine-containing, contaminated environment.
Summary of the invention
At the problem that prior art exists, the invention provides a kind of bof process and produce aluminium killed steel with wash heat material and preparation method thereof.
Bof process of the present invention produce aluminium killed steel with wash heat material composition by weight percentage for containing CaO30 ~ 60%, Al
2O
320 ~ 45%, SiO
20 ~ 15%, MgO0 ~ 15%, Al0 ~ 15%, BaO 0 ~ 5.02%, K
2O 0 ~ 2%, Na
2O 0 ~ 25%, Mg0.001 ~ 1%, and Ca 0 ~ 1%, and surplus is an impurity, wherein impurity weight content＜5%.
The temperature of fusion of above-mentioned wash heat material is 800 ~ 1300 ℃.
The fusing time (sludging time) of above-mentioned wash heat material in the time of 1450 ℃ is at 1.5 ~ 20s.
Bof process production aluminium killed steel of the present invention carries out according to the following steps with the preparation method of wash heat material:
1, will contain the Ca raw material, contain Al
2O
3Raw material and reducing agent mix, and obtain mixed material, and configuration proportion is by weight for containing the Ca raw material: reducing agent: contain Al
2O
3Raw material=1:0.001 ~ 0.5:0.3 ~ 1.5; Add additive then in mixed material, mix rear acquisition slag charge, the addition of additive is 0 ~ 40% of mixed material gross weight;
2,1 ~ 100% of the slag charge gross weight that obtains is placed the heating furnace heat fused after, when also having leftover materials, add again remaining slag charge, after whole slag charges fusings, stop energising, naturally be cooled to the fritting slag charge, then physics fragmentation, acquisition wash heat material product.
The above-mentioned Ca raw material that contains is selected lime or Wingdale for use.
Above-mentioned reductive agent is selected aluminum shot, aluminium powder, aluminium block, aluminium bits or AD powder for use.
The above-mentioned Al that contains
2O
3Raw material choose bauxite, alumina powder or aluminium slag.
Above-mentioned additive is sodium oxide, potassium oxide, barium oxide, salt of wormwood, albite, potassium felspar sand, barium carbonate and/or sodium bicarbonate.
After in the said method slag charge being placed heating furnace, to the heating furnace energising starting the arc, utilize the high temperature of electric arc that slag charge is fused into liquid, after the fusing of the slag charge in the heating furnace, when keeping energising, add remaining slag charge; The method that adds leftover materials is once to add whole leftover materials, add leftover materials or be divided into and repeatedly add leftover materials more than 2 batches continuously.
Above-mentioned process furnace is electric arc furnace, fused magnesium fusing furnace, melting corundum stove, changes slag hearth or the hot stove in ore deposit; Process furnace adopts Graphite Electrodes to heat.
In the said method, the mode that adds remaining slag charge is to adopt once to add or at twice above adding.
The chemical reaction that takes place in the aforesaid method comprises following reaction
MgO+Al=Al
2O
3+Mg （1）
CaO+Al=Al
2O
3+Ca （2）
Ca, the Mg that the wash heat material of the present invention preparation generates has part to stay in the slag, when this slag charge is used for steelmaking process, metal A l and Ca or Mg can with steel in O, S following reaction takes place:
Ca+[S]=CaS （3）
Ca+[O]=CaO （4）
Mg+[S]=MgS （5）
Mg+[O]=MgO （6）
2Al+3[O]=Al
2O
3 （7）
CaO in the slag also with steel in S have following reaction:
CaO+[S]=CaS+[O]（8）
Characteristics of the present invention are that this slag system has deoxidizing capacity preferably owing to there is the reaction of (4), (6), (7), owing to there is the reaction of above-mentioned (3), (5), (8), this wash heat material also has sweetening power preferably simultaneously.
Wherein Al uses as reducing agent and exothermic mixture, reaches when reducing slag oxidation, also utilizes exothermic reaction (2Al+3O=Al
2O
3) the liberated heat temperature drop that slag charge that the compensation tapping process adds causes because of heat absorption in fusion process that generates heat; Wash heat material of the present invention is floride-free slag system, the non-environmental-pollution problem.
In addition, in tapping process, add this wash heat material after because the Ca that the reaction of reaction equation (2) generates plays Al in the steel
2O
3Field trash and sulfide carry out the effect of degenerative treatments, therefore, have solved preferably the Al that generates in the invar in the casting process in this wash heat material use procedure
2O
3The nozzle clogging problem that field trash etc. cause has guaranteed the smooth cast of continuous casting.
The wash heat material main phase of the present invention's preparation consists of low-melting mCaOnAl
2O
3, because mCaOnAl
2O
3With Al
2O
3Interfacial tension between field trash is little, has to adsorb preferably Al
2O
3The ability of field trash, the Al in the decrease steel
2O
3Field trash also helps to solve continous casting sprue dross problem, guarantees the smooth cast of continuous casting.
When the pre-melted slag material granularity is thin,, can avoid occurring dust pollution question with the fine powder that sifts out after the fragmentation of fritting slag charge less than 1 ~ 2mm.
Wash heat material of the present invention is owing to be whole pre-melts, homogeneous chemical composition, and fusing point is low, and fusing time is lacked.In factory's use procedure, can guarantee sequence casting process continous casting sprue non-nodulating, water the stove number thereby make steel mill's casting process obtain higher company.
Embodiment
The aluminium block that adopts in the embodiment of the invention, aluminum shot, aluminium powder, aluminium bits, AD powder, sodium oxide, albite, lime and Wingdale are the general industry product.
The aluminium slag that adopts in the embodiment of the invention is a general industry aluminium slag.
The bauxite and the alumina powder that adopt are the general industry product.
The equipment of measuring temperature of fusion and fusing time (sludging time) in the embodiment of the invention is LZ-III type slag pre-arcing characterisitics determinator.
Wash heat material product in the embodiment of the invention is as shown in table 1 in steel mill's result of use
Table 1
Embodiment 1
The Ca raw material that contains of selecting is lime, and the reducing agent of selecting is aluminum shot, the Al that selects
2O
3Raw material is bauxite, and the additive of selecting is the potassium oxide that waits mass mixing;
The heating furnace that adopts is electric arc furnaces;
To contain Ca raw material, reducing agent and contain Al
2O
3Raw material mixes, and mixes rear acquisition mixed material, and configuration proportion is by weight for containing the Ca raw material: reducing agent: contain Al
2O
3Raw material=1:0.05:0.45; Add additive then in mixed material, mix rear acquisition slag charge, the addition of additive is 1% of mixed material gross weight;
The slag charge of percentage by weight 40% is placed heating furnace, the heating furnace of described heating furnace for heating by graphite electrode; To the heating furnace energising starting the arc, utilize the high temperature of electric arc that slag charge is fused into liquid under the condition that is higher than the material fusing point, after the fusing of the slag charge in the heating furnace, when keeping energising, be divided into 4 batches and add remaining slag charge; All after the slag charge fusing, stop energising, the slag charge of fusing is poured out, naturally be cooled to the fritting slag charge; According to steel mill's buying standard-required, again wash heat material physics is crushed to granularity below 35mm, sift out the fine powder less than 1mm, obtain the wash heat material; Then according to steel mill buying standard-required packing deliver to steel mill for steel mill's use, the processing steel grade is SPHC, addition 3kg/t steel, liquid steel temperature is 1619 ℃ after the tapping, smoke dust occurs in the adition process, and the dross phenomenon does not appear in the mouth of a river, and steel mill's practical effect sees attached list 1;
Wash heat material composition is by weight percentage for containing CaO59.3%, Al
2O
321.7%, SiO
26.1%, MgO3.6%, Al 6.5%, BaO0.01%, K
2O0.013%, Na
2O0.52%, Mg 0.003%, and Ca 0.0011%, and surplus is impurity S, P, FeO etc.;
The temperature of fusion of wash heat material is 1212 ℃.The sludging time 10s of wash heat material in the time of 1450 ℃.
Embodiment 2
The Ca raw material that contains of selecting is lime, and the reducing agent of selecting is aluminium bits, and that selects contains Al
2O
3Raw material is alumina powder, and the additive of selecting is albite;
The heating furnace that adopts is the melting corundum stove;
To contain Ca raw material, reducing agent and contain Al
2O
3Raw material mixes, and mixes rear acquisition mixed material, and configuration proportion is by weight for containing the Ca raw material: reducing agent: contain Al
2O
3Raw material=1:0.011:1.43; Add additive then in mixed material, mix rear acquisition slag charge, the addition of additive is 8% of mixed material gross weight;
The slag charge of percentage by weight 25% is placed heating furnace, the heating furnace of described heating furnace for heating by graphite electrode; To the heating furnace energising starting the arc, utilize the high temperature of electric arc that slag charge is fused into liquid under the condition that is higher than the material fusing point, after the fusing of the slag charge in the heating furnace, when keeping energising, be divided into 5 batches and add remaining slag charge; All after the slag charge fusing, stop energising, the slag charge of fusing is poured out, naturally be cooled to the fritting slag charge; According to steel mill's buying standard-required, again wash heat material physics is crushed to granularity below 75mm, obtain the wash heat material; Then according to steel mill buying standard-required packing deliver to steel mill for steel mill's use, steel mill's practical effect sees attached list 1;
Wash heat material composition is by weight percentage for containing CaO42.5%, Al
2O
334.3%, Al 0.021%, SiO
20.9%, K
2O 0.021%, Na
2O 2.87%, BaO0.034%, and MgO10.3%, Mg 0.0012%, and surplus is a foreign matter content;
The temperature of fusion of wash heat material is 1140 ℃.The sludging time of wash heat material in the time of 1450 ℃ is 8s.
Embodiment 3
The Ca raw material that contains of selecting is lime, and the reducing agent of selecting is the AD powder, and that selects contains Al
2O
3Raw material is bauxite, and the additive of selecting is potash;
The heating furnace that adopts is the fused magnesite smelting furnace;
To contain Ca raw material, reducing agent and contain Al
2O
3Raw material mixes, and mixes rear acquisition mixed material, and configuration proportion is by weight for containing the Ca raw material: reducing agent: contain Al
2O
3Raw material=1:0.09:0.84, the addition of additive is 0.05% of mixed material gross weight.Mix rear acquisition slag charge;
The slag charge of percentage by weight 20% is placed heating furnace, the heating furnace of described heating furnace for heating by graphite electrode; To the heating furnace energising starting the arc, utilize the high temperature of electric arc that slag charge is fused into liquid under the condition that is higher than the material fusing point, after the fusing of the slag charge in the heating furnace, when keeping energising, add continuously remaining slag charge; All after the slag charge fusing, stop energising, the slag charge of fusing is poured out, naturally be cooled to the fritting slag charge; According to steel mill's buying standard-required, again wash heat material physics is crushed to granularity below 40mm, obtain the wash heat material; Then according to steel mill buying standard-required packing deliver to steel mill for steel mill's use, steel mill's practical effect sees attached list 1;
Wash heat material composition is by weight percentage for containing CaO47.5%, Al
2O
333.1%, SiO
29.2%, MgO7.3%, Al 1.7%, Mg0.3%, Na
2O0.004%, K
2O 0.001%, BaO0.0034%, and surplus is an impurity weight;
The temperature of fusion of wash heat material is 1132 ℃.The sludging time of wash heat material in the time of 1450 ℃ is 12s.
Embodiment 4
The Ca raw material that contains of selecting is lime, and the reducing agent of selecting is aluminium block, and that selects contains Al
2O
3Raw material is the aluminium slag, and the additive of selecting is sodium oxide molybdena;
The heating furnace that adopts is the customizations slag hearth;
To contain Ca raw material, reducing agent and contain Al
2O
3Raw material mixes, and mixes rear acquisition mixed material, and configuration proportion is by weight for containing the Ca raw material: reducing agent: contain Al
2O
3Raw material=1:0.01:0.81; Add additive then in mixed material, mix rear acquisition slag charge, the addition of additive is 40% of mixed material gross weight;
The slag charge of percentage by weight 17% is placed heating furnace, the heating furnace of described heating furnace for heating by graphite electrode; To the heating furnace energising starting the arc, utilize the high temperature of electric arc that slag charge is fused into liquid under the condition that is higher than the material fusing point, after the fusing of the slag charge in the heating furnace, when keeping energising, be divided into 8 batches and add remaining slag charge; All after the slag charge fusing, stop energising, the slag charge of fusing is poured out, naturally be cooled to the fritting slag charge; According to steel mill's buying standard-required, again wash heat material physics is crushed to granularity below 25mm, sift out the fine powder less than 2mm, obtain the wash heat material; Then according to steel mill buying standard-required packing deliver to steel mill for steel mill's use, steel mill's practical effect sees attached list 1;
Wash heat material composition is by weight percentage for containing CaO31.2%, Al
2O
323.9%, SiO
28.2%, Al5.18%, K
2O0.001%, Na
2O20.5%, MgO8.01%, Mg 0.04%, Ca0.24%, surplus is a foreign matter content;
The temperature of fusion of wash heat material is 817 ℃.The sludging time of wash heat material in the time of 1450 ℃ is 1.5s.
Embodiment 5
The Ca raw material that contains of selecting is lime stone, and the reducing agent of selecting is aluminium bits, and that selects contains Al
2O
3Raw material is bauxite, and the additive of selecting is barium monoxide;
The heating furnace that adopts is electric arc furnaces;
To contain Ca raw material, reducing agent and contain Al
2O
3Raw material mixes, and mixes rear acquisition mixed material, and configuration proportion is by weight for containing the Ca raw material: reducing agent: contain Al
2O
3Raw material=1:0.3:0.54.Add additive then in mixture, mix the back and obtain slag charge, the add-on of additive is 2% of a mixture gross weight;
The slag charge of percentage by weight 5% is placed heating furnace, the heating furnace of described heating furnace for heating by graphite electrode; To the heating furnace energising starting the arc, utilize the high temperature of electric arc that slag charge is fused into liquid under the condition that is higher than the material fusing point, after the fusing of the slag charge in the heating furnace, when keeping energising, be divided into 10 batches and add remaining slag charge; All after the slag charge fusing, stop energising, the slag charge of fusing is poured out, naturally be cooled to the fritting slag charge; According to steel mill's buying standard-required, again wash heat material physics is crushed to granularity below 60mm, obtain the wash heat material; Then according to steel mill buying standard-required packing deliver to steel mill for steel mill's use, steel mill's practical effect sees attached list 1;
Wash heat material composition is by weight percentage for containing CaO31.3%, Al
2O
327.9%, SiO
25.2%, MgO11.3%, Al 19.9%, K
2O0.032%, Ba
2O0.34%, Mg 0. 4%, Ca0.34%, Na
2O0.0001%, surplus is a foreign matter content;
The temperature of fusion of wash heat material is 1287 ℃.The sludging time of wash heat material in the time of 1450 ℃ is 16s.
Embodiment 6
The Ca raw material that contains of selecting is lime, and the reducing agent of selecting is aluminium powder, and that selects contains Al
2O
3Raw material is bauxite, and additive is brium carbonate;
The heating furnace that adopts is mineral hot furnace;
To contain Ca raw material, reducing agent and contain Al
2O
3Raw material mixes, and mixes rear acquisition mixed material, and configuration proportion is by weight for containing the Ca raw material: reducing agent: contain Al
2O
3Raw material=1:0.001:0.85.Add additive then in mixture, mix the back and obtain slag charge, the add-on of additive is 1% of a mixture gross weight;
The slag charge of percentage by weight 25% is placed heating furnace, the heating furnace of described heating furnace for heating by graphite electrode; To the heating furnace energising starting the arc, utilize the high temperature of electric arc that slag charge is fused into liquid under the condition that is higher than the material fusing point, after the fusing of the slag charge in the heating furnace, when keeping energising, add continuously remaining slag charge; All after the slag charge fusing, stop energising, the slag charge of fusing is poured out, naturally be cooled to the fritting slag charge; According to steel mill's buying standard-required, again wash heat material physics is crushed to granularity below 35mm, sift out the fine powder less than 2mm, obtain the wash heat material; Then according to steel mill buying standard-required packing deliver to steel mill for steel mill's use, steel mill's practical effect sees attached list 1;
Wash heat material composition is by weight percentage for containing CaO50.4%, Al
2O
331.3%, SiO
26.1%, MgO10.3%, K
2O0.012%, Ba
2O0.004%, Mg 0.014%, Ca0.27%, surplus is a foreign matter content;
The temperature of fusion of wash heat material is 1294 ℃.The sludging time of wash heat material in the time of 1450 ℃ is 20s.
Embodiment 7
The Ca raw material that contains of selecting is lime, and the reducing agent of selecting is aluminium powder, the Al that selects
2O
3Raw material is the aluminium slag, and the additive of selecting is brium carbonate;
The heating furnace that adopts is electric arc furnaces;
To contain Ca raw material, reducing agent and contain Al
2O
3Raw material mixes, and mixes rear acquisition mixed material, and configuration proportion is by weight for containing the Ca raw material: reducing agent: contain Al
2O
3Raw material=1:0.1:1; Add additive then in mixed material, mix rear acquisition slag charge, the addition of additive is 5% of mixed material gross weight;
The slag charge of percentage by weight 1% is placed heating furnace, the heating furnace of described heating furnace for heating by graphite electrode, to the heating furnace energising starting the arc, utilize the high temperature of electric arc that slag charge is fused into liquid under the condition that is higher than the material fusing point, after the fusing of the slag charge in the heating furnace, when keeping energising, be divided into 15 batches and add remaining slag charge; All after the slag charge fusing, stop energising, the slag charge of fusing is poured out, naturally be cooled to the fritting slag charge; According to steel mill's buying standard-required, again wash heat material physics is crushed to granularity below 65mm, obtain the wash heat material; Then according to steel mill buying standard-required packing deliver to steel mill for steel mill's use, steel mill's practical effect sees attached list 1;
Wash heat material composition is by weight percentage for containing CaO59.7%, Al
2O
324.2%, SiO
24.4%, MgO3.3%, Al 5.31%, BaO1.3%, K
2O0.003%, Na
2O0.005%, Mg 0.004%, and Ca 0.003%, and surplus is impurity S, P, FeO etc.;
The temperature of fusion of wash heat material is 1034 ℃.The sludging time 19s of wash heat material in the time of 1450 ℃.
Embodiment 8
The Ca raw material that contains of selecting is lime stone, and the reducing agent of selecting is the aluminium bits, the Al that selects
2O
3Raw material is alumina powder, and the additive of selecting is sodium bicarbonate;
The heating furnace that adopts is mineral hot furnace;
To contain Ca raw material, reducing agent and contain Al
2O
3Raw material mixes, and mixes rear acquisition mixed material, and configuration proportion is by weight for containing the Ca raw material: reducing agent: contain Al
2O
3Raw material=1:0.2:0.43; Add additive then in mixed material, mix rear acquisition slag charge, the addition of additive is 4% of mixed material gross weight;
The slag charge of percentage by weight 10% is placed heating furnace, the heating furnace of described heating furnace for heating by graphite electrode, to the heating furnace energising starting the arc, utilize the high temperature of electric arc that slag charge is fused into liquid under the condition that is higher than the material fusing point, after the fusing of the slag charge in the heating furnace, when keeping energising, add continuously remaining slag charge; All after the slag charge fusing, stop energising, the slag charge of fusing is poured out, naturally be cooled to the fritting slag charge; According to steel mill's buying standard-required, again wash heat material physics is crushed to granularity below 35mm, obtain the wash heat material; Then according to steel mill buying standard-required packing deliver to steel mill for steel mill's use, steel mill's practical effect sees attached list 1;
Wash heat material composition is by weight percentage for containing CaO40.9%, Al
2O
338.2%, SiO
23.1%, MgO0.1%, Al 15%, BaO0.002%, K
2O0.003%, Na
2O1.25%, Mg 0.008%, and Ca 0.001%, and surplus is impurity S, P, FeO etc.;
The temperature of fusion of wash heat material is 1042 ℃.The sludging time 6s of wash heat material in the time of 1450 ℃.
Embodiment 9
The Ca raw material that contains of selecting is lime, and the reducing agent of selecting is aluminum shot, the Al that selects
2O
3Raw material is alumina powder, and the additive of selecting is potassic feldspar;
The process furnace that adopts is for changing slag hearth;
To contain Ca raw material, reducing agent and contain Al
2O
3Raw material mixes, and mixes rear acquisition mixed material, and configuration proportion is by weight for containing the Ca raw material: reducing agent: contain Al
2O
3Raw material=1:0.15:0.85; Add additive then in mixed material, mix rear acquisition slag charge, the addition of additive is 3% of mixed material gross weight;
The slag charge of percentage by weight 3% is placed heating furnace, the heating furnace of described heating furnace for heating by graphite electrode, to the heating furnace energising starting the arc, utilize the high temperature of electric arc that slag charge is fused into liquid under the condition that is higher than the material fusing point, after the fusing of the slag charge in the heating furnace, when keeping energising, be divided into 10 batches and add remaining slag charge; All after the slag charge fusing, stop energising, the slag charge of fusing is poured out, naturally be cooled to the fritting slag charge; According to steel mill's buying standard-required, again wash heat material physics is crushed to granularity below 100mm, obtain the wash heat material; Then according to steel mill buying standard-required packing deliver to steel mill for steel mill's use, steel mill's practical effect sees attached list 1;
Wash heat material composition is by weight percentage for containing CaO48.8%, Al
2O
340.1%, SiO
20.013%, MgO1.24%, Al 5.73%, BaO0.001%, K
2O0.21%, Na
2O0.002%, Mg 0.003%, and Ca 0.002%, and surplus is impurity S, P, FeO etc.;
The temperature of fusion of wash heat material is 1147 ℃.The sludging time 13s of wash heat material in the time of 1450 ℃.
Embodiment 10
The Ca raw material that contains of selecting is lime, and the reducing agent of selecting is the aluminium bits, the Al that selects
2O
3Raw material is the aluminium slag, and the additive of selecting is brium carbonate;
The heating furnace that adopts is electric arc furnaces;
To contain Ca raw material, reducing agent and contain Al
2O
3Raw material mixes, and mixes rear acquisition mixed material, and configuration proportion is by weight for containing the Ca raw material: reducing agent: contain Al
2O
3Raw material=1:0.1:0.9; Add additive then in mixed material, mix rear acquisition slag charge, the addition of additive is 3% of mixed material gross weight;
The slag charge of percentage by weight 7% is placed heating furnace, the heating furnace of described heating furnace for heating by graphite electrode, to the heating furnace energising starting the arc, utilize the high temperature of electric arc that slag charge is fused into liquid under the condition that is higher than the material fusing point, after the fusing of the slag charge in the heating furnace, when keeping energising, be divided into 9 batches and add remaining slag charge; All after the slag charge fusing, stop energising, the slag charge of fusing is poured out, naturally be cooled to the fritting slag charge; According to steel mill's buying standard-required, again wash heat material physics is crushed to granularity below 35mm, sift out granularity less than the part of 1mm, obtain the wash heat material; Then according to steel mill buying standard-required packing deliver to steel mill for steel mill's use, steel mill's practical effect sees attached list 1;
Wash heat material composition is by weight percentage for containing CaO47.4%, Al
2O
325.6%, SiO
211.8%, MgO6.6%, Al 5.33%, BaO0.94%, K
2O0.002%, Na
2O0.003%, Mg 0.002%, and Ca 0.004%, and surplus is impurity S, P, FeO etc.;
The temperature of fusion of wash heat material is 821 ℃.The sludging time 17s of wash heat material in the time of 1450 ℃.
Embodiment 11
The Ca raw material that contains of selecting is lime, and the reducing agent of selecting is the AD powder, the Al that selects
2O
3Raw material is alumina powder, and the additive of selecting is sodium oxide molybdena;
The heating furnace that adopts is mineral hot furnace;
To contain Ca raw material, reducing agent and contain Al
2O
3Raw material mixes, and mixes rear acquisition mixed material, and configuration proportion is by weight for containing the Ca raw material: reducing agent: contain Al
2O
3Raw material=1:0.4:1; Add additive then in mixed material, mix rear acquisition slag charge, the addition of additive is 20% of mixed material gross weight;
The slag charge of percentage by weight 20% is placed heating furnace, the heating furnace of described heating furnace for heating by graphite electrode, to the heating furnace energising starting the arc, utilize the high temperature of electric arc that slag charge is fused into liquid under the condition that is higher than the material fusing point, after the fusing of the slag charge in the heating furnace, when keeping energising, be divided into 3 batches and add remaining slag charge; All after the slag charge fusing, stop energising, the slag charge of fusing is poured out, naturally be cooled to the fritting slag charge; According to steel mill's buying standard-required, again wash heat material physics is crushed to granularity below 55mm, sift out granularity less than the part of 1mm, obtain the wash heat material; Then according to steel mill buying standard-required packing deliver to steel mill for steel mill's use, steel mill's practical effect sees attached list 1;
Wash heat material composition is by weight percentage for containing CaO33.6%, Al
2O
344.9%, SiO
25.01%, MgO2.8%, Al 3.25%, BaO0.004%, K
2O0.003%, Na
2O9.3%, Mg 0.005%, and Ca 0.001%, and surplus is impurity S, P, FeO etc.;
The temperature of fusion of wash heat material is 1148 ℃.The sludging time 19s of wash heat material in the time of 1450 ℃.
Embodiment 12
The Ca raw material that contains of selecting is lime, and the reducing agent of selecting is aluminium block, the Al that selects
2O
3Raw material is bauxite, and the additive of selecting is potassic feldspar;
The heating furnace that adopts is the melting corundum stove;
To contain Ca raw material, reducing agent and contain Al
2O
3Raw material mixes, and mixes rear acquisition mixed material, and configuration proportion is by weight for containing the Ca raw material: reducing agent: contain Al
2O
3Raw material=1:0.05:0.35; Add additive then in mixed material, mix rear acquisition slag charge, the addition of additive is 12% of mixed material gross weight;
Whole slag charges are placed heating furnace, the heating furnace of described heating furnace for heating by graphite electrode, to the heating furnace energising starting the arc, utilize the high temperature of electric arc that slag charge is fused into liquid under the condition that is higher than the material fusing point, all after the slag charge fusing, stop energising, the slag charge of fusing is poured out, naturally be cooled to the fritting slag charge; According to steel mill's buying standard-required, again wash heat material physics is crushed to granularity below 30mm, sift out granularity less than the part of 1mm, obtain the wash heat material; Then according to steel mill buying standard-required packing deliver to steel mill for steel mill's use, steel mill's practical effect sees attached list 1;
Wash heat material composition is by weight percentage for containing CaO58.4%, Al
2O
320.2%, SiO
211.4%, MgO5.1%, Al 1.64%, BaO0.002%, K
2O1.41%, Na
2O0.004%, Mg 0.003%, and Ca 0.001%, and surplus is impurity S, P, FeO etc.;
The temperature of fusion of wash heat material is 1032 ℃.The sludging time 13s of wash heat material in the time of 1450 ℃.
Embodiment 13
The Ca raw material that contains of selecting is lime, and the reducing agent of selecting is aluminum shot, the Al that selects
2O
3Raw material is the aluminium slag, and the additive of selecting is brium carbonate;
The heating furnace that adopts is the fused magnesium fusing furnace;
To contain Ca raw material, reducing agent and contain Al
2O
3Raw material mixes, and mixes rear acquisition mixed material, and configuration proportion is by weight for containing the Ca raw material: reducing agent: contain Al
2O
3Raw material=1:0.12:0.88; Add additive then in mixed material, mix rear acquisition slag charge, the addition of additive is 7% of mixed material gross weight;
The slag charge of percentage by weight 17% is placed heating furnace, the heating furnace of described heating furnace for heating by graphite electrode, to the heating furnace energising starting the arc, utilize the high temperature of electric arc that slag charge is fused into liquid under the condition that is higher than the material fusing point, after the fusing of the slag charge in the heating furnace, when keeping energising, be divided into 12 batches and add remaining slag charge; All after the slag charge fusing, stop energising, the slag charge of fusing is poured out, naturally be cooled to the fritting slag charge; According to steel mill's buying standard-required, again wash heat material physics is crushed to granularity below 60mm, obtain the wash heat material; Then according to steel mill buying standard-required packing deliver to steel mill for steel mill's use, steel mill's practical effect sees attached list 1;
Wash heat material composition is by weight percentage for containing CaO45.5%, Al
2O
326.8%, SiO
29.5%, MgO5.9%, Al 5.93%, BaO1.72%, K
2O0.005%, Na
2O0.003%, Mg 0.001%, and Ca 0.002%, and surplus is impurity S, P, FeO etc.;
The temperature of fusion of wash heat material is 1158 ℃.The sludging time 17s of wash heat material in the time of 1450 ℃.
Embodiment 14
The Ca raw material that contains of selecting is lime stone, and the reducing agent of selecting is the aluminium bits, the Al that selects
2O
3Raw material is alumina powder;
The process furnace that adopts is for changing slag hearth;
To contain Ca raw material, reducing agent and contain Al
2O
3Raw material mixes, and mixes rear acquisition mixed material, and configuration proportion is by weight for containing the Ca raw material: reducing agent: contain Al
2O
3Raw material=1:0.2:0.5;
The slag charge of percentage by weight 80% is placed heating furnace, the heating furnace of described heating furnace for heating by graphite electrode, to the heating furnace energising starting the arc, utilize the high temperature of electric arc that slag charge is fused into liquid under the condition that is higher than the material fusing point, after the fusing of the slag charge in the heating furnace, when keeping energising, once add remaining slag charge; All after the slag charge fusing, stop energising, the slag charge of fusing is poured out, naturally be cooled to the fritting slag charge; According to steel mill's buying standard-required, again wash heat material physics is crushed to granularity below 65mm, sift out granularity less than the part of 1mm, obtain the wash heat material.Then according to steel mill buying standard-required packing deliver to steel mill for steel mill's use, steel mill's practical effect sees attached list 1;
Wash heat material composition is by weight percentage for containing CaO40.3%, Al
2O
340.2%, SiO
20.8%, MgO0.9%, Al 14.9%, K
2O0.001%, Na
2O0.001%, Mg 0.01%, and Ca 0.05%, and surplus is impurity S, P, FeO etc.;
The temperature of fusion of wash heat material is 978 ℃.The sludging time 12s of wash heat material in the time of 1450 ℃.
Embodiment 15
The Ca raw material that contains of selecting is lime stone, and the reducing agent of selecting is the AD powder, the Al that selects
2O
3Raw material is the aluminium slag;
The heating furnace that adopts is mineral hot furnace;
To contain Ca raw material, reducing agent and contain Al
2O
3Raw material mixes, and mixes rear acquisition mixed material, and configuration proportion is by weight for containing the Ca raw material: reducing agent: contain Al
2O
3Raw material=1:0.2:1;
The slag charge of percentage by weight 25% is placed heating furnace, the heating furnace of described heating furnace for heating by graphite electrode, to the heating furnace energising starting the arc, utilize the high temperature of electric arc that slag charge is fused into liquid under the condition that is higher than the material fusing point, after the fusing of the slag charge in the heating furnace, add remaining slag charge 3 batches of the same time-divisions that keeps energising; All after the slag charge fusing, stop energising, the slag charge of fusing is poured out, naturally be cooled to the fritting slag charge; According to steel mill's buying standard-required, again wash heat material physics is crushed to granularity below 45mm, obtain the wash heat material;
Wash heat material composition is by weight percentage for containing CaO30.4%, Al
2O
334.4%, SiO
213.5%, MgO7%, Al 12.6%, K
2O0.001%, Na
2O0.004%, Mg 0.005%, and Ca 0.003%, and surplus is impurity S, P, FeO etc.;
The temperature of fusion of wash heat material is 978 ℃.The sludging time 12s of wash heat material in the time of 1450 ℃.
Claims (5)
1. a bof process is produced aluminium killed steel wash heat material, and the composition that it is characterized in that the wash heat material is by weight percentage for containing CaO30 ~ 60%, Al
2O
320 ~ 45%, SiO
20 ~ 15%, MgO0 ~ 15%, Al0 ~ 15%, BaO 0 ~ 5.02%, K
2O 0 ~ 2%, Na
2O 0 ~ 25%, Mg0.001 ~ 1%, and Ca 0 ~ 1%, and surplus is the impurity of weight content＜5%.
2. the described bof process of claim 1 is produced the preparation method of aluminium killed steel with the wash heat material, it is characterized in that carrying out according to the following steps:
(1) will contain the Ca raw material, contain Al
2O
3Raw material and reducing agent mix, and obtain mixed material, and configuration proportion is by weight for containing the Ca raw material: reducing agent: contain Al
2O
3Raw material=1:0.001 ~ 0.5:0.3 ~ 1.5; Add additive then in mixed material, mix rear acquisition slag charge, the addition of additive is 0 ~ 40% of mixed material gross weight;
(2) 1 ~ 100% of the slag charge gross weight that obtains is placed the heating furnace heat fused after, when also having leftover materials, add again remaining slag charge, after whole slag charges fusings, stop energising, naturally be cooled to the fritting slag charge, then physics fragmentation, acquisition wash heat material.
3. the preparation method of slag washing material for converter process production aluminum killed steel according to claim 2 is characterized in that the described Ca of containing raw material choose lime or lime stone, and described reducing agent is selected aluminum shot, aluminium powder, aluminium block, aluminium bits or AD powder, the described Al that contains
2O
3Raw material choose bauxite, alumina powder or aluminium slag, described additive are sodium oxide molybdena, potassium oxide, barium monoxide, potash, albite, potassic feldspar, brium carbonate and/or sodium bicarbonate.
4. the preparation method of slag washing material for converter process production aluminum killed steel according to claim 2, after it is characterized in that slag charge placed heating furnace, to the heating furnace energising starting the arc, utilize the high temperature of electric arc that slag charge is fused into liquid, after the fusing of the slag charge in the heating furnace, when keeping energising, add remaining slag charge; The method that adds leftover materials is once to add whole leftover materials, add leftover materials or be divided into and repeatedly add leftover materials more than 2 batches continuously.
5. bof process according to claim 2 is produced the preparation method of aluminium killed steel with the wash heat material, it is characterized in that described process furnace is electric arc furnace, fused magnesium fusing furnace, melting corundum stove, changes slag hearth or the hot stove in ore deposit.
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| CN111230054A (en) * | 2020-03-11 | 2020-06-05 | 柳州钢铁股份有限公司 | Method for cleaning slag adhered to bottom of steel ladle |
| CN111230054B (en) * | 2020-03-11 | 2021-04-06 | 柳州钢铁股份有限公司 | Method for cleaning slag adhered to bottom of steel ladle |
| CN113416815A (en) * | 2021-06-18 | 2021-09-21 | 江苏润美新材料有限公司 | Synthetic slag for aluminum killed steel direct slag-feeding washing desulfurization process and production process and equipment thereof |
| CN114592105A (en) * | 2022-03-17 | 2022-06-07 | 广东韶钢松山股份有限公司 | Control method of deformed steel bar acid-soluble aluminum |
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| CN102071279B (en) | 2012-09-26 |
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