CN114657326B - A kind of dephosphorization agent and its application - Google Patents
A kind of dephosphorization agent and its application Download PDFInfo
- Publication number
- CN114657326B CN114657326B CN202210326699.5A CN202210326699A CN114657326B CN 114657326 B CN114657326 B CN 114657326B CN 202210326699 A CN202210326699 A CN 202210326699A CN 114657326 B CN114657326 B CN 114657326B
- Authority
- CN
- China
- Prior art keywords
- dephosphorization
- agent
- cao
- molten iron
- content
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 110
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 48
- 229910052742 iron Inorganic materials 0.000 claims abstract description 40
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 14
- 239000011574 phosphorus Substances 0.000 claims abstract description 13
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000009628 steelmaking Methods 0.000 claims abstract description 7
- 238000002360 preparation method Methods 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 68
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 31
- 229910015372 FeAl Inorganic materials 0.000 claims description 20
- 229910044991 metal oxide Inorganic materials 0.000 claims description 9
- 150000004706 metal oxides Chemical class 0.000 claims description 9
- 239000002994 raw material Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 8
- 239000008188 pellet Substances 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims 1
- 229910045601 alloy Inorganic materials 0.000 claims 1
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 239000002893 slag Substances 0.000 abstract description 14
- 238000000034 method Methods 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000002844 melting Methods 0.000 abstract description 4
- 230000008018 melting Effects 0.000 abstract description 4
- 238000003723 Smelting Methods 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000005272 metallurgy Methods 0.000 abstract 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 68
- 239000011734 sodium Substances 0.000 description 37
- 239000000292 calcium oxide Substances 0.000 description 34
- 235000012255 calcium oxide Nutrition 0.000 description 34
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 8
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 8
- 229910052760 oxygen Inorganic materials 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 5
- 235000011941 Tilia x europaea Nutrition 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 239000004571 lime Substances 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 229910000805 Pig iron Inorganic materials 0.000 description 4
- 239000004115 Sodium Silicate Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- 229910001570 bauxite Inorganic materials 0.000 description 4
- 235000010216 calcium carbonate Nutrition 0.000 description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 4
- 235000017557 sodium bicarbonate Nutrition 0.000 description 4
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 4
- 229910052911 sodium silicate Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000007664 blowing Methods 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 235000019738 Limestone Nutrition 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 description 2
- -1 MgO and TiO 2 Chemical class 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000001506 calcium phosphate Substances 0.000 description 1
- 229910000389 calcium phosphate Inorganic materials 0.000 description 1
- 235000011010 calcium phosphates Nutrition 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/064—Dephosphorising; Desulfurising
- C21C7/0645—Agents used for dephosphorising or desulfurising
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/02—Dephosphorising or desulfurising
- C21C1/025—Agents used for dephosphorising or desulfurising
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
Description
技术领域Technical field
本发明涉及冶金技术领域，尤其涉及一种脱磷剂及其应用。The invention relates to the field of metallurgical technology, and in particular to a dephosphorizing agent and its application.
背景技术Background technique
磷是钢水中典型的杂质元素，脱磷是炼钢工艺的基本操作之一。转炉炼钢过程中，磷负荷过高，一方面会带来冶炼周期长、渣量大、排放高、能耗高、铁损大等系列问题；另一方面，由于转炉炼钢无外来热源，从热量的角度也不允许入转炉的铁水[P]过高，通常要求铁水[P]<0.15％，这极大限制了磷含量偏高(如我国特色的高磷铁矿)的铁矿资源的使用范围。Phosphorus is a typical impurity element in molten steel, and dephosphorization is one of the basic operations in the steelmaking process. During the converter steelmaking process, the phosphorus load is too high. On the one hand, it will cause a series of problems such as long smelting cycle, large slag volume, high emissions, high energy consumption, and large iron loss. On the other hand, since there is no external heat source for converter steelmaking, From a thermal point of view, the molten iron [P] entering the converter is not allowed to be too high. The molten iron [P] is usually required to be <0.15%, which greatly limits the iron ore resources with high phosphorus content (such as my country's characteristic high-phosphorus iron ore). scope of use.
传统铁水预脱磷大多只以石灰和氧化铁皮(或氧气作为气体氧源)作为脱磷剂，此种条件下石灰溶解效率低、渣流动性差，脱磷动力学条件恶劣，因此预脱磷效率很低。Traditional pre-dephosphorization of molten iron mostly uses only lime and iron oxide scale (or oxygen as the gas oxygen source) as dephosphorization agents. Under such conditions, the lime dissolution efficiency is low, the slag fluidity is poor, and the dephosphorization kinetic conditions are poor. Therefore, the pre-dephosphorization efficiency is low. Very low.
发明内容Contents of the invention
本发明的目的在于提供一种脱磷剂及其制备方法和应用，本发明提供的脱磷剂石灰溶解效率高，成渣极快，流动性更好，磷容量高，脱磷率高。The object of the present invention is to provide a dephosphorization agent and a preparation method and application thereof. The dephosphorization agent provided by the present invention has high lime dissolution efficiency, extremely fast slag formation, better fluidity, high phosphorus capacity and high dephosphorization rate.
为了实现上述发明目的，本发明提供以下技术方案：In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:
本发明提供了一种脱磷剂，化学组成以金属氧化物计，包括CaO、Fe2O3、Al2O3和Na2O；所述Fe2O3和CaO的质量比为(1～8)：1；所述CaO和Al2O3的质量比为(4～13)：1；所述Al2O3和Na2O的质量比为(2～8)：1。The invention provides a dephosphorization agent, the chemical composition of which is based on metal oxides, including CaO, Fe 2 O 3 , Al 2 O 3 and Na 2 O; the mass ratio of Fe 2 O 3 and CaO is (1~ 8): 1; the mass ratio of CaO and Al 2 O 3 is (4-13): 1; the mass ratio of Al 2 O 3 and Na 2 O is (2-8): 1.
优选的，所述CaO由含CaO的材料或含CaCO3的材料提供。Preferably, the CaO is provided by a material containing CaO or a material containing CaCO3 .
优选的，所述含CaO的材料中CaO的质量含量为65％以上；所述含CaCO3的材料中CaCO3的质量含量为65％以上。Preferably, the mass content of CaO in the CaO-containing material is more than 65%; the mass content of CaCO 3 in the CaCO 3 -containing material is more than 65%.
优选的，所述Fe2O3由含Fe2O3的材料或含FeAl2O4的材料提供。Preferably, the Fe 2 O 3 is provided by a Fe 2 O 3 -containing material or a FeAl 2 O 4 -containing material.
优选的，所述含Fe2O3的材料中Fe2O3的质量含量为70％以上；所述含FeAl2O4的材料中FeAl2O4的质量含量为40％以上。Preferably, the mass content of Fe 2 O 3 in the material containing Fe 2 O 3 is greater than 70%; the mass content of FeAl 2 O 4 in the material containing FeAl 2 O 4 is greater than 40%.
优选的，所述Al2O3由含Al2O3的材料或含FeAl2O4的材料提供。Preferably, the Al 2 O 3 is provided by an Al 2 O 3 -containing material or a FeAl 2 O 4 -containing material.
优选的，所述含Al2O3的材料中Al2O3的质量含量在65％以上。Preferably, the mass content of Al 2 O 3 in the material containing Al 2 O 3 is above 65%.
优选的，所述Na2O由含Na2O的材料、含Na2CO3的材料或含Na2SiO3的材料提供。Preferably, the Na 2 O is provided by a material containing Na 2 O, a material containing Na 2 CO 3 or a material containing Na 2 SiO 3 .
优选的，所述含Na2O的材料中Na2O的质量含量为80％以上；所述含Na2CO3的材料中Na2CO3的质量含量为80％以上；所述含Na2SiO3的材料中Na2SiO3的质量含量为80％以上。Preferably, the mass content of Na 2 O in the Na 2 O-containing material is more than 80%; the mass content of Na 2 CO 3 in the Na 2 CO 3 -containing material is more than 80%; the Na 2 -containing material The mass content of Na 2 SiO 3 in the SiO 3 material is more than 80%.
本发明提供了上述方案所述脱磷剂对含铁料在炼钢流程脱磷中的应用，所述含铁料的磷含量≤0.25wt％。The present invention provides the application of the dephosphorization agent described in the above solution to the dephosphorization of iron-containing materials in the steelmaking process, and the phosphorus content of the iron-containing materials is ≤0.25wt%.
本发明提供了一种脱磷剂，化学组成以金属氧化物计，包括CaO、Fe2O3、Al2O3和Na2O；所述Fe2O3和CaO的质量比为(1～8)：1；所述CaO和Al2O3的质量比为(4～13)：1；所述Al2O3和Na2O的质量比为(2～8)：1。The invention provides a dephosphorization agent, the chemical composition of which is based on metal oxides, including CaO, Fe 2 O 3 , Al 2 O 3 and Na 2 O; the mass ratio of Fe 2 O 3 and CaO is (1~ 8): 1; the mass ratio of CaO and Al 2 O 3 is (4-13): 1; the mass ratio of Al 2 O 3 and Na 2 O is (2-8): 1.
本发明脱磷剂中含有适量Al2O3、Na2O，降低了传统CaO、Fe2O3渣系的熔点，改善了熔渣的流动性。同时，提升了石灰的溶解度，使得渣系磷酸钙固溶体含量增加，提升了磷容量。因此，本发明的脱磷剂渣系熔点更低，成渣极快，流动性更好，磷容量高，脱磷效率高，极具市场前景与应用价值。The dephosphorization agent of the present invention contains an appropriate amount of Al 2 O 3 and Na 2 O, which reduces the melting point of the traditional CaO and Fe 2 O 3 slag systems and improves the fluidity of the molten slag. At the same time, the solubility of lime is increased, which increases the solid solution content of calcium phosphate in the slag system and increases the phosphorus capacity. Therefore, the dephosphorization agent slag system of the present invention has a lower melting point, extremely fast slag formation, better fluidity, high phosphorus capacity, and high dephosphorization efficiency, and has great market prospects and application value.
本发明的脱磷剂能够在铁水储存及运输至转炉工序的短时间内实现70％以上的脱磷率。采用本发明的脱磷剂进行铁水预脱磷后，70％以上的脱磷在铁水进转炉前完成，一方面能够有效拓展铁矿资源可利用范围，显著提升磷含量偏高的劣质铁矿石资源在高炉中的应用比例，另一方面转炉炼钢过程冶炼效率有效提升，渣量等排放显著降低，经济效益及环境效益巨大。The dephosphorization agent of the present invention can achieve a dephosphorization rate of more than 70% in a short time during the storage and transportation of molten iron to the converter process. After the dephosphorization agent of the present invention is used for pre-dephosphorization of molten iron, more than 70% of the dephosphorization is completed before the molten iron enters the converter. On the one hand, it can effectively expand the available range of iron ore resources and significantly improve inferior iron ore with high phosphorus content. The application ratio of resources in blast furnaces. On the other hand, the smelting efficiency of the converter steelmaking process has been effectively improved, the amount of slag and other emissions have been significantly reduced, and the economic and environmental benefits are huge.
附图说明Description of drawings
图1为本发明提供的高效脱磷剂制备方法流程图。Figure 1 is a flow chart of the preparation method of the high-efficiency dephosphorization agent provided by the present invention.
具体实施方式Detailed ways
本发明提供了一种脱磷剂，化学组成以金属氧化物计，包括CaO、Fe2O3、Al2O3和Na2O；所述Fe2O3和CaO的质量比为(1～8)：1；所述CaO和Al2O3的质量比为(4～13)：1；所述Al2O3和Na2O的质量比为(2～8)：1。The invention provides a dephosphorization agent, the chemical composition of which is based on metal oxides, including CaO, Fe 2 O 3 , Al 2 O 3 and Na 2 O; the mass ratio of Fe 2 O 3 and CaO is (1~ 8): 1; the mass ratio of CaO and Al 2 O 3 is (4-13): 1; the mass ratio of Al 2 O 3 and Na 2 O is (2-8): 1.
在本发明中，所述Fe2O3和CaO的质量比优选为(2～7)：1，进一步优选为(3～6)：1；所述CaO和Al2O3的质量比优选为(6～11)：1，更优选为(8～10)：1；所述Al2O3和Na2O的质量比优选为(3～7)：1，更优选为(4～6)：1。In the present invention, the mass ratio of Fe2O3 to CaO is preferably (2-7):1, more preferably (3-6):1; the mass ratio of CaO to Al2O3 is preferably (6-11):1, more preferably (8-10):1; the mass ratio of Al2O3 to Na2O is preferably (3-7):1, more preferably (4-6):1.
在本发明中，所述CaO优选由含CaO的材料或含CaCO3的材料提供，所述含CaO的材料中CaO的质量含量优选为65％以上；所述含CaCO3的材料中CaCO3的质量含量优选为65％以上。本发明对含CaO或CaCO3的材料没有特殊要求，本领域熟知的满足上述含量要求的含CaO或CaCO3的材料均可，具体的，如生石灰或石灰石。In the present invention, the CaO is preferably provided by a CaO-containing material or a CaCO3 -containing material. The mass content of CaO in the CaO-containing material is preferably more than 65%; the CaCO3 content of the CaCO3 -containing material is preferably The mass content is preferably 65% or more. The present invention has no special requirements for CaO or CaCO 3 -containing materials. CaO or CaCO 3 -containing materials that are well known in the art and meet the above content requirements can be used, specifically, such as quicklime or limestone.
在本发明中，所述Fe2O3优选由含Fe2O3的材料或含FeAl2O4的材料提供；所述含Fe2O3的材料中Fe2O3的质量含量优选为70％以上；所述含FeAl2O4的材料中FeAl2O4的质量含量优选为40％以上。本发明对含Fe2O3或FeAl2O4的材料没有特殊要求，本领域熟知的满足上述含量要求的含Fe2O3或FeAl2O4的材料均可，具体的，如轧钢铁皮、铁矿粉和尾矿中的一种或多种。In the present invention, the Fe 2 O 3 is preferably provided by a Fe 2 O 3 -containing material or a FeAl 2 O 4 -containing material; the mass content of Fe 2 O 3 in the Fe 2 O 3 -containing material is preferably 70 % or more; the mass content of FeAl 2 O 4 in the FeAl 2 O 4 -containing material is preferably more than 40%. The present invention has no special requirements for materials containing Fe 2 O 3 or FeAl 2 O 4. Materials containing Fe 2 O 3 or FeAl 2 O 4 that are well known in the art and meet the above content requirements can be used. Specifically, such as rolled steel sheets, One or more of iron ore powder and tailings.
在本发明中，所述Al2O3优选由含Al2O3或含FeAl2O4的材料提供，所述含Al2O3的材料中Al2O3的质量含量优选在65％以上；所述含FeAl2O4的材料中FeAl2O4的质量含量优选为40％以上。本发明对所述含Al2O3的材料或含FeAl2O4的材料没有特殊要求，本领域熟知的满足上述含量要求的含Al2O3或FeAl2O4的材料均可，具体的，如铝矾土、高铝尾矿。In the present invention, the Al 2 O 3 is preferably provided by a material containing Al 2 O 3 or FeAl 2 O 4. The mass content of Al 2 O 3 in the material containing Al 2 O 3 is preferably above 65%. ; The mass content of FeAl 2 O 4 in the FeAl 2 O 4 -containing material is preferably more than 40%. The present invention has no special requirements for the Al 2 O 3 -containing material or FeAl 2 O 4 -containing material. Any Al 2 O 3 or FeAl 2 O 4 -containing material well known in the art that meets the above content requirements can be used. Specifically , such as bauxite and high-aluminum tailings.
在本发明中，所述Na2O优选由含Na2O的材料、含Na2CO3的材料或含Na2SiO3的材料提供，所述含Na2O的材料中Na2O的质量含量为80％以上；所述含Na2CO3的材料中Na2CO3的质量含量为80％以上；所述含Na2SiO3的材料中Na2SiO3的质量含量为80％以上。本发明对含Na2O、Na2CO3或Na2SiO3的材料没有特殊要求，本领域熟知的满足上述含量要求的含Na2O、Na2CO3或Na2SiO3的材料均可，具体的，如小苏打、苏打和硅酸钠中的一种或多种。在本发明中，所述硅酸钠为液体硅酸钠或固体硅酸钠。In the present invention, the Na 2 O is preferably provided by a material containing Na 2 O, a material containing Na 2 CO 3 or a material containing Na 2 SiO 3 , wherein the mass content of Na 2 O in the material containing Na 2 O is more than 80%; the mass content of Na 2 CO 3 in the material containing Na 2 CO 3 is more than 80%; the mass content of Na 2 SiO 3 in the material containing Na 2 SiO 3 is more than 80%. The present invention has no special requirements for the materials containing Na 2 O, Na 2 CO 3 or Na 2 SiO 3 , and any materials containing Na 2 O, Na 2 CO 3 or Na 2 SiO 3 that meet the above content requirements known in the art can be used, such as one or more of baking soda, soda and sodium silicate. In the present invention, the sodium silicate is liquid sodium silicate or solid sodium silicate.
在本发明中，所述脱磷剂中P的质量含量优选＜0.1％，S的质量含量优选＜0.05％，原料中P和S杂质的存在不利于脱磷。In the present invention, the mass content of P in the dephosphorization agent is preferably <0.1%, and the mass content of S is preferably <0.05%. The presence of P and S impurities in the raw material is not conducive to dephosphorization.
在本发明中，所述脱磷剂中还不可避免的含有其他金属氧化物，如MgO、TiO2，所述其他金属氧化物的含量优选不超过2％。In the present invention, the dephosphorization agent inevitably contains other metal oxides, such as MgO and TiO 2 , and the content of the other metal oxides is preferably not more than 2%.
此外，本发明的脱磷剂还不可避免的含有二氧化硅，二氧化硅在渣成分中会起到调节碱度，降低熔点的作用，本发明对二氧化硅的含量不做特殊限制。In addition, the dephosphorization agent of the present invention inevitably contains silica. Silica in the slag component can adjust the alkalinity and lower the melting point. The present invention does not place special restrictions on the content of silica.
本发明脱磷剂中CaO、Fe2O3、Al2O3和Na2O的总含量优选在92％以上。The total content of CaO, Fe 2 O 3 , Al 2 O 3 and Na 2 O in the dephosphorization agent of the present invention is preferably above 92%.
本发明对所述脱磷剂的制备方法没有特殊要求，直接按照脱磷剂中各金属氧化物的质量比将对应的原料进行配料，然后破碎混匀，制备成喷吹粉剂、球团或压块即可，具体的制备流程图如图1所示。The present invention has no special requirements for the preparation method of the dephosphorization agent. The corresponding raw materials are directly batched according to the mass ratio of each metal oxide in the dephosphorization agent, and then crushed and mixed to prepare spray powder, pellets or pressed powder. The specific preparation flow chart is shown in Figure 1.
当脱磷剂为喷吹粉剂时，所述喷吹粉剂的粒径优选为0.5mm～2mm；当脱磷剂为球团或压块时，所述球团或压块的粒径优选为10mm～20mm。When the dephosphorization agent is a spray powder, the particle size of the spray powder is preferably 0.5 mm to 2 mm; when the dephosphorization agent is pellets or briquettes, the particle size of the pellets or briquettes is preferably 10 mm. ~20mm.
在本发明中，如某种材料同时可提供Fe2O3和Al2O3，如含FeAl2O4的材料，则进行原料换算时，将FeAl2O4同时换算成Fe2O3和Al2O3。In the present invention, if a certain material can provide Fe 2 O 3 and Al 2 O 3 at the same time, such as a material containing FeAl 2 O 4 , then when converting raw materials, FeAl 2 O 4 will be converted into Fe 2 O 3 and Al 2 O 3 .
本发明提供了上述方案所述脱磷剂在铁水预脱磷中的应用。The present invention provides the application of the dephosphorization agent described in the above scheme in pre-dephosphorization of molten iron.
在本发明中，预脱磷前所述铁水中[P]含量≤0.25wt％，优选为0.15～0.25％，更优选为0.2～0.25％。本发明对所述铁水中[C]含量没有特殊要求，本领域熟知的高炉铁水均可。In the present invention, the [P] content in the molten iron before pre-dephosphorization is ≤0.25wt%, preferably 0.15-0.25%, more preferably 0.2-0.25%. The present invention has no special requirements for the [C] content in the molten iron, and any blast furnace molten iron known in the art can be used.
在本发明中，所述预脱磷优选在在铁水进转炉前完成，更优选在铁水储存或运输至转炉工序中进行，具体的如：将脱磷剂加入到铁水罐或鱼雷罐车内进行预脱磷。在本发明中，实施铁水预脱磷操作时，铁水罐或鱼雷罐车顶部可选择性配备除尘或吹氧装置，吹氧装置可以起搅拌作用，促进脱磷，吹氧过程中有粉尘逸出，配备除尘装置可以减少粉尘。在本发明中，所述脱磷剂的使用量优选为铁水质量的2～10wt％；所述预脱磷的温度优选为1350～1480℃，更优选为1380～1450℃；所述预脱磷的时间优选为6～12min，更优选为8～10min。在本发明中，所述脱磷剂的质量以折算后的金属氧化物的质量计。In the present invention, the pre-dephosphorization is preferably completed before the molten iron enters the converter, and is more preferably carried out during the process of storing or transporting the molten iron to the converter, such as: adding the dephosphorization agent to the molten iron tank or torpedo tank car for pre-dephosphorization. In the present invention, when the molten iron pre-dephosphorization operation is implemented, the top of the molten iron tank or torpedo tank car can be selectively equipped with a dust removal or oxygen blowing device. The oxygen blowing device can play a stirring role to promote dephosphorization. Dust escapes during the oxygen blowing process, and the dust removal device can be equipped to reduce dust. In the present invention, the amount of the dephosphorization agent used is preferably 2 to 10wt% of the mass of the molten iron; the temperature of the pre-dephosphorization is preferably 1350 to 1480°C, more preferably 1380 to 1450°C; the time of the pre-dephosphorization is preferably 6 to 12min, more preferably 8 to 10min. In the present invention, the mass of the dephosphorization agent is measured by the mass of the converted metal oxide.
下面结合实施例对本发明提供的脱磷剂及其应用进行详细的说明，但是不能把它们理解为对本发明保护范围的限定。The dephosphorization agent provided by the present invention and its application will be described in detail below with reference to the examples, but they should not be understood as limiting the protection scope of the present invention.
实施例1Example 1
取原料生石灰、铝钒土、小苏打和轧钢铁皮，充分混匀磨细后，制备为粒径15mm的压块。其中脱磷剂中按质量比Fe2O3：CaO为4.1：1、质量比CaO：Al2O3为8.5:1、质量比Al2O3：Na2O为5.1:1。Take the raw materials of quicklime, bauxite, baking soda and rolled steel, mix and grind them thoroughly, and prepare briquettes with a particle size of 15 mm. The dephosphorization agent has a mass ratio of Fe 2 O 3 :CaO of 4.1:1, a mass ratio of CaO:Al 2 O 3 of 8.5:1, and a mass ratio of Al 2 O 3 :Na 2 O of 5.1:1.
表1实施例1各原料主要成分(wt％)Table 1 Main components of each raw material in Example 1 (wt%)
取初始[C]含量为4.3wt％，[P]含量为0.23wt％的生铁块2.20Kg进行脱磷试验，控制温度1410℃，向炉内分别加入脱磷剂150g，进行脱磷10min，得到[P]0.060wt％、[C]3.2wt％的铁水。脱磷率为73.9％。Take 2.20Kg of pig iron with an initial [C] content of 4.3wt% and a [P] content of 0.23wt% for a dephosphorization test. Control the temperature to 1410°C, add 150g of dephosphorization agent to the furnace, and perform dephosphorization for 10 minutes to obtain [P] 0.060wt%, [C] 3.2wt% molten iron. The dephosphorization rate is 73.9%.
实施例2Example 2
取原料石灰石、铝钒土、小苏打和含铁尾矿，充分混匀磨细后，制备为粒径1mm的粉剂。其中脱磷剂中按照质量比Fe2O3：CaO为2.3:1、质量比CaO：Al2O3为8.4:1、质量比Al2O3：Na2O为4.3:1。Take the raw materials limestone, bauxite, baking soda and iron-containing tailings, mix them thoroughly and grind them into fine powder to prepare a powder with a particle size of 1mm. The dephosphorization agent has a mass ratio of Fe 2 O 3 :CaO of 2.3:1, a mass ratio of CaO:Al 2 O 3 of 8.4:1, and a mass ratio of Al 2 O 3 :Na 2 O of 4.3:1.
表2实施例2各原料主要成分(wt％)Table 2 Example 2 Main components of each raw material (wt%)
取初始[C]含量为4.5wt％，[P]含量为0.24wt％的生铁块2.15Kg进行预脱磷试验，控制温度1410℃，向炉内分别加入脱磷剂148g，进行脱磷10min，得到[P]0.064wt％、[C]4.0wt％的铁水。脱磷率为73.3％。Take 2.15Kg of pig iron with an initial [C] content of 4.5wt% and a [P] content of 0.24wt% for a pre-dephosphorization test. Control the temperature to 1410°C, add 148g of dephosphorization agent to the furnace, and perform dephosphorization for 10 minutes. [P] 0.064wt% and [C] 4.0wt% molten iron were obtained. The dephosphorization rate is 73.3%.
实施例3Example 3
取原料生石灰、铝钒土、小苏打和含铁尾矿，成分如上表1和表2中所示，充分混匀磨细后，制备为粒径20mm的压块。其中脱磷剂中按照质量比Fe2O3：CaO为4.2:1、质量比CaO：Al2O3为9.8:1、质量比Al2O3：Na2O为4.8:1。Take the raw materials quicklime, bauxite, baking soda and iron-containing tailings. The ingredients are as shown in Table 1 and Table 2 above. After thorough mixing and grinding, prepare briquettes with a particle size of 20 mm. The dephosphorization agent has a mass ratio of Fe 2 O 3 :CaO of 4.2:1, a mass ratio of CaO:Al 2 O 3 of 9.8:1, and a mass ratio of Al 2 O 3 :Na 2 O of 4.8:1.
取初始[C]含量为4.5wt％，[P]含量为0.24wt％的生铁块2.3Kg进行预脱磷试验，控制温度1410℃，向炉内分别加入脱磷剂159g，进行脱磷10min，得到[P]0.066wt％、[C]3.6wt％的铁水。脱磷率为72.5％。Take 2.3Kg of pig iron with an initial [C] content of 4.5wt% and a [P] content of 0.24wt% for a pre-dephosphorization test. Control the temperature to 1410°C, add 159g of dephosphorization agent to the furnace, and perform dephosphorization for 10 minutes. Molten iron with [P] 0.066wt% and [C] 3.6wt% was obtained. The dephosphorization rate is 72.5%.
对比例1Comparative example 1
与实施例1的铁水条件基本相同，初始[C]含量为4.4wt％，[P]含量为0.23wt％的生铁块2.10Kg，进行预脱磷试验，控制温度1410℃，向炉内分别加入脱磷剂150g，进行脱磷10min，不同之处在于，脱磷剂仅为石灰和轧钢铁皮，即CaO:Fe2O3＝5.6。脱磷渣组成以质量百分比计为：(FeO％)＝29.8，二元碱度(CaO/SiO2)R＝3.93。脱磷后铁水成分为：[P]0.123wt％、[C]2.6wt％。脱磷率为46.5％。The molten iron conditions are basically the same as those in Example 1. The initial [C] content is 4.4wt% and the [P] content is 0.23wt%. 2.10Kg of pig iron blocks are used for pre-dephosphorization test. The temperature is controlled at 1410°C and added into the furnace respectively. 150g of dephosphorization agent is used for dephosphorization for 10 minutes. The difference is that the dephosphorization agent is only lime and rolling steel scale, that is, CaO:Fe 2 O 3 =5.6. The composition of the dephosphorization slag is calculated as mass percentage: (FeO%) = 29.8, and the binary basicity (CaO/SiO 2 ) R = 3.93. The composition of molten iron after dephosphorization is: [P] 0.123wt%, [C] 2.6wt%. The dephosphorization rate is 46.5%.
由以上实施例和对比例可知，本发明提供的脱磷剂相比传统脱磷剂，具有更高的脱磷率。It can be seen from the above examples and comparative examples that the dephosphorization agent provided by the present invention has a higher dephosphorization rate than traditional dephosphorization agents.
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210326699.5A CN114657326B (en) | 2022-03-30 | 2022-03-30 | A kind of dephosphorization agent and its application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210326699.5A CN114657326B (en) | 2022-03-30 | 2022-03-30 | A kind of dephosphorization agent and its application |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114657326A CN114657326A (en) | 2022-06-24 |
| CN114657326B true CN114657326B (en) | 2024-04-02 |
Family
ID=82033910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210326699.5A Active CN114657326B (en) | 2022-03-30 | 2022-03-30 | A kind of dephosphorization agent and its application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114657326B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114990276A (en) * | 2022-07-04 | 2022-09-02 | 北京科技大学 | Method for simultaneously pre-desulfurizing and pre-dephosphorizing molten iron |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104278124B (en) * | 2014-10-11 | 2016-06-22 | 中南大学 | A kind of Dephosphorising agent and application thereof |
| JP6481774B2 (en) * | 2016-01-05 | 2019-03-13 | 新日鐵住金株式会社 | Molten iron dephosphorizing agent, refining agent and dephosphorizing method |
| CN109825673A (en) * | 2019-03-26 | 2019-05-31 | 山东钢铁股份有限公司 | A kind of converter dephosphorization agent and its application |
-
2022
- 2022-03-30 CN CN202210326699.5A patent/CN114657326B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN114657326A (en) | 2022-06-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105506226B (en) | Method for carrying out pre-desiliconization, pre-decarburization and pre-dephosphorization on molten iron in molten iron tank | |
| CN106348626B (en) | A method of recycling converter molten state slag is to produce concrete admixture | |
| CN102010933A (en) | Molten iron dephosphorization agent manufactured by using converter dry-method dust-removal ash as raw material | |
| CN103498016B (en) | Dephosphorization agent prepared by taking slag of decarbonization furnace as raw material and molten iron dephosphorization method | |
| CN101560586A (en) | Compound dephosphorization agent with converter slag as raw material and preparing method thereof | |
| CN103952515A (en) | A method for recycling high-iron red mud as a steelmaking slagging agent/dephosphorization agent | |
| CN108486315A (en) | It is a kind of using pneumatic steelmaking dedusting ash as dephosphorization of molten iron desulfurizing agent of base-material and preparation method thereof | |
| CN101717842A (en) | Method for dephosphorization and desulphurization in process of steel production in induction furnace | |
| CN102296153A (en) | Novel premelting dephosphorization agent for steel making and preparation method thereof | |
| CN101845536B (en) | Composite molten steel slag washing agent based on LF (ladle furnace) refining waste slag and preparation method thereof | |
| CN103981335B (en) | A kind of vanadium-bearing hot metal vanadium extraction and dephosphorization agent | |
| CN114657326B (en) | A kind of dephosphorization agent and its application | |
| CN111996327A (en) | Molten iron pretreatment dephosphorization agent using industrial waste as raw material | |
| CN100529111C (en) | A special slagging agent for desulfurization of vanadium, titanium and magnesium iron | |
| CN101353711B (en) | Carbonaceous material block molten iron bath reduction ironmaking desulphurization method | |
| CN101020943A (en) | Phosphorus reducing method for process of smelting Ni-Cr pig iron with nickel oxide ore | |
| CN100526480C (en) | Dephosphorising agent for melted iron pretreatment by KR method | |
| CN108929931B (en) | A kind of desiliconizing agent for hot metal pretreatment outside blast furnace and its preparation and use method | |
| CN102146500A (en) | Flux for steelmaking and preparation and use methods thereof | |
| CN108315525A (en) | semi-steel dephosphorizing method | |
| CN115652027B (en) | LF furnace rapid slag forming composite sphere and preparation and use method thereof | |
| CN116875769A (en) | Barium calcium aluminate desulfurizer and its preparation method and steel preparation method | |
| CN116891938A (en) | Method for preparing sinter by using converter steel slag tailings | |
| CN114807717A (en) | Low-cost silicon-aluminum-calcium-carbon alloy, preparation method thereof and application thereof in converter metallurgy heat supplement | |
| CN104480254B (en) | Desulfurization dephosphorization agent of half steel and its production and use |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |