JPS5836046B2 - Lime-based dephosphorizing agent - Google Patents
Lime-based dephosphorizing agentInfo
- Publication number
- JPS5836046B2 JPS5836046B2 JP5274781A JP5274781A JPS5836046B2 JP S5836046 B2 JPS5836046 B2 JP S5836046B2 JP 5274781 A JP5274781 A JP 5274781A JP 5274781 A JP5274781 A JP 5274781A JP S5836046 B2 JPS5836046 B2 JP S5836046B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- powder
- parts
- dephosphorizing agent
- lime
- 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.)
- Expired
Links
- 235000008733 Citrus aurantifolia Nutrition 0.000 title claims description 11
- 235000011941 Tilia x europaea Nutrition 0.000 title claims description 11
- 239000004571 lime Substances 0.000 title claims description 11
- 239000003795 chemical substances by application Substances 0.000 claims description 23
- 239000000843 powder Substances 0.000 claims description 22
- 239000002184 metal Substances 0.000 claims description 18
- 229910052751 metal Inorganic materials 0.000 claims description 18
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 21
- 239000000292 calcium oxide Substances 0.000 description 11
- 235000012255 calcium oxide Nutrition 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 6
- 239000011575 calcium Substances 0.000 description 5
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 4
- 239000001110 calcium chloride Substances 0.000 description 4
- 235000011148 calcium chloride Nutrition 0.000 description 4
- 229910001628 calcium chloride Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- WETINTNJFLGREW-UHFFFAOYSA-N calcium;iron;tetrahydrate Chemical compound O.O.O.O.[Ca].[Fe].[Fe] WETINTNJFLGREW-UHFFFAOYSA-N 0.000 description 2
- 239000013256 coordination polymer Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- FAIAAWCVCHQXDN-UHFFFAOYSA-N phosphorus trichloride Chemical compound ClP(Cl)Cl FAIAAWCVCHQXDN-UHFFFAOYSA-N 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 150000002926 oxygen Chemical class 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 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
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/02—Dephosphorising or desulfurising
- C21C1/025—Agents used for dephosphorising or desulfurising
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)
Description
【発明の詳細な説明】
本発明は、溶銑用脱燐剤、特に溶銑用の石灰系脱燐剤に
関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dephosphorizing agent for hot metal, particularly a lime-based dephosphorizing agent for hot metal.
従来から、溶銑用脱燐剤としては、Ｃ ａ Ｏ ｐＦｅ
ＯＣａＦ２，Ｎａ２ＣＯ３，ＣａＣｌ２，な２ ３
’
どを組合せた或分の石灰系脱燐剤が提案されているが、
これらは、それ自体充分脱燐能を具備しているが、溶銑
に添加した場合、通常の方法ではその能力を発揮するこ
とができず、多量に使用する必要があり、捷た温度低下
などにより、十分な脱燐能を発揮することはできない。Conventionally, C a O pFe has been used as a dephosphorizing agent for hot metal.
OCaF2, Na2CO3, CaCl2, na2 3
' Some lime-based dephosphorizing agents have been proposed in combination with
These substances themselves have sufficient dephosphorizing ability, but when added to hot metal, they cannot demonstrate their ability using normal methods, and it is necessary to use large quantities, which may cause dephosphorization due to lowering the temperature of the hot metal. , cannot exhibit sufficient dephosphorizing ability.
本発明は、従来の石灰系脱燐剤を改良することを目的と
するもので、高度サラン粉を特定量配合することにより
、高脱燐能を具備させるようにした溶銑用脱燐剤を提供
しようとするものである。The present invention aims to improve conventional lime-based dephosphorizing agents, and provides a dephosphorizing agent for hot metal that has a high dephosphorizing ability by incorporating a specific amount of high-grade saran powder. This is what I am trying to do.
すなわち、本発明の第１の発明は、１０重量φ以下の高
度サラン粉粉末を含有した石灰系脱燐剤であり、第２の
発明はＣａＯとＦｅ２０３との割合が重量比で、０．６
〜１．５であり、しかも、これら両或分を少くとも９０
重量φ以上含有した粉末９０〜９５重量部と高度サラン
粉５〜１０重量部とを含有してなる石灰系脱燐剤である
。That is, the first invention of the present invention is a lime-based dephosphorizing agent containing high-grade saran powder with a weight of 10 weight φ or less, and the second invention is a lime-based dephosphorizing agent containing a high-grade saran powder with a weight ratio of 0.6.
~1.5, and both of these fractions are at least 90
This is a lime-based dephosphorizing agent containing 90 to 95 parts by weight of a powder containing φ or more and 5 to 10 parts by weight of high-grade saran powder.
以下、さらに詳しく本発明を説明する。The present invention will be explained in more detail below.
本発明は、１０重量係以下の高度サラン粉を含有させた
石灰系脱燐剤であるが、高度サラン粉は、化学式がＣａ
（Ｃ＃Ｏ）２である酸化剤として知られているが、溶銑
用脱燐剤としては全く知られていないものであり、この
高度サラン粉のすぐれた酸化能を溶銑中に含１れれ〔Ｐ
〕の酸化に利用しようとするものである。The present invention is a lime-based dephosphorizing agent containing high-grade saran powder with a weight ratio of 10 or less, and the high-grade saran powder has a chemical formula of Ca
(C#O)2 is known as an oxidizing agent, but it is completely unknown as a dephosphorizing agent for hot metal. P
] is intended to be used for the oxidation of
さらにこれについて説明すると、溶銑中の〔Ｐ〕の除去
機構については、一般的に次の反応によるものと云われ
ている。To further explain this, the mechanism for removing [P] from hot metal is generally said to be based on the following reaction.
２〔Ｐ〕＋５／２（０２）→（Ｐ２０５）・・・−・・
・・（１）（Ｐ２０，）＋３〜４（ＣａＯ）→（３〜４
）（ＣａＯ−Ｐ２０５）・・・・・・・・・・・Ｃ）（
１）は、溶銑中の（Ｐ，ｌの酸化反応であり、（２）は
酸化生或物である（Ｐ２０５）のＣａＯによる固定化反
応である。2 [P] + 5/2 (02) → (P205)...-
...(1)(P20,)+3~4(CaO)→(3~4
)(CaO-P205)・・・・・・・・・・・・C)(
1) is an oxidation reaction of (P,l) in hot metal, and (2) is an immobilization reaction of (P205), which is an oxidation product, by CaO.
高度サラン粉は、脱燐時においては、次の分解反応によ
りＣａ（Ｊ’２，０２を生戊し、さらにＣａＣｌ２ は
気相状のＣａとＣｌ２を発生するようになる。During dephosphorization, high-grade saran powder generates Ca (J'2,02) through the following decomposition reaction, and CaCl2 also generates gaseous Ca and Cl2.
Ｃａ （ＣｌＯ）２ →ＣａＣｌ２＋０２ ””・（
３）ＣａＣＡ２ →Ｃａ ＋Ｃｌ２”＝（４
）（３）の反応にかいて生或した０２は非常に活性に富
んだものであるために、きわめて大きな酸化力を有し、
短時間に溶銑中のＣＰ）を酸化するととができる。Ca (ClO)2 →CaCl2+02 ””・(
3) CaCA2 →Ca +Cl2”=(4
) The 02 produced in the reaction of (3) is highly active and therefore has an extremely large oxidizing power.
It is possible to oxidize CP in hot metal in a short time.
１た、ＣａＣｌ２ ０分解により生或したＣｌ２はこれ
渣た強力な酸化剤であるためＣＰ）の酸化に寄与するも
のである。In addition, Cl2 produced by the decomposition of CaCl2 is a strong oxidizing agent and thus contributes to the oxidation of CP).
２ （Ｐ ）＋３ ＣＣｌ２ ）→２（ＰＣｌ３）・・
・・・・・・・（５）（５）の反応にあ・いて、生戊す
るＰＣｌ３はガス状態で系外に気散するか、又はその一
部は系外の酸素と反応し、Ｐ２０，と々り、固定化剤で
あるＣａＯと反応しスラグとなる。2 (P) + 3 CCl2) → 2 (PCl3)...
・・・・・・・・・(5) In the reaction of (5), the generated PCl3 diffuses out of the system in a gaseous state, or a part of it reacts with oxygen outside the system, resulting in P20 , it reacts with CaO, which is a fixing agent, and becomes slag.
本発明にかいて、高度サラン粉の含有量を１０重量φ以
下と限定した理由は、その酸化力があ１りにも大きいた
め、溶銑中の〔Ｐ〕だけでなく、溶銑自身すなわち（Ｆ
ｅ ）をも酸化し、処理後の溶銑の歩留り低下を招くか
らである。In the present invention, the content of high-grade saran powder is limited to 10 weight φ or less because its oxidizing power is extremely large.
e) is also oxidized, leading to a decrease in the yield of hot metal after treatment.
次に本発明の第２の発明について説明する。Next, the second invention of the present invention will be explained.
第２の発明のＣａＯとＦｅ２０３ との割合が重量比で
０．６〜１．５であり、しかもこれらの或分が少くとも
９０重量φ以下含有した粉末（以下フエライト系物質と
いう）とは、組或的にはｎｃａｏ・Ｆｅ２０３但しｎは
、１．５〜２であるカルシウムフエライトが好１しく、
ＳｉＯ２，ＭｇＯ，Ａｌ２０３などの不可避或分が１０
重量俤以下である粉末である。The powder (hereinafter referred to as ferrite material) in which the ratio of CaO and Fe203 is 0.6 to 1.5 by weight and contains at least 90 weight φ or less of CaO and Fe203 according to the second invention is as follows: Calcium ferrite is preferably ncao/Fe203, where n is 1.5 to 2;
The unavoidable amount of SiO2, MgO, Al203, etc. is 10
It is a powder that weighs less than 20% by weight.
これは、その１Ｌ脱燐剤として使用可能であるが、これ
を９０〜９５重量部と高度サラン粉５〜１０重量部の割
合で含有したものは一層脱燐効果が向上する。This can be used as a 1L dephosphorizing agent, but the dephosphorizing effect is further improved when it is contained in a ratio of 90 to 95 parts by weight and 5 to 10 parts by weight of high-grade saran powder.
との脱燐機構は、次の反応によるものと考えられる。The dephosphorization mechanism with is thought to be due to the following reaction.
６ （Ｐ ）＋５ （Ｆ ｅ２ ｏ３）−＋３ （ Ｐ
２ ０５ ）＋１０ （Ｆｅ ）・・・・・・・・・（
６）
（Ｐ２０， ）＋３ （ＣａＯ ）−＋３ （ＣａＯ−
Ｐ２０， ）−−−−−・（７）次に、ＣａＯとＦｅ２
０３との割合を重量比で０．６〜１．５と限定した理由
は、０．６未満では酸化生或物であるｐ２ｏ，を充分に
固定することはできず、１た、１．５をこえると（Ｐ）
を酸化するに要するＦｅ２０３が不足し、脱燐能が乏し
くなるからである。6 (P)+5 (F e2 o3)-+3 (P
2 05 )+10 (Fe )・・・・・・・・・(
6) (P20, )+3 (CaO)-+3 (CaO-
P20, )------・(7) Next, CaO and Fe2
The reason why the ratio with 03 was limited to 0.6 to 1.5 in terms of weight ratio is that if it is less than 0.6, the oxidized product p2o cannot be sufficiently fixed; Beyond (P)
This is because Fe203 required to oxidize is insufficient, resulting in poor dephosphorization ability.
１たＣａＣＬ Ｆｅ２０３の或分が前記したようにｎｃ
ａｏ−Ｆｅ２０３（ ｎ＝１．５〜２ ）のカルシウム
フエライトの組或状態として存在した方が、脱燐効果及
びスラグの均一なる熔融性の点から好１しいが、これに
限られるものではない。1. Some of the CaCL Fe203 was nc as described above.
It is preferable for calcium ferrite to exist as a group of ao-Fe203 (n=1.5 to 2) from the viewpoint of dephosphorization effect and uniform meltability of slag, but it is not limited to this. .
次に、フエライト系物質と高度サラン粉との割合を重量
で９０〜９５部と５〜１０部と限定した理由は、高度サ
ラン粉が５部未満では効果は少なく、１０部をこえると
その酸化力によって溶銑自体が酸化するので好１しくな
く、１た高度サラン粉が高価であり、脱燐処理コストの
上昇につながるからでもある。Next, the reason why we limited the proportions of ferrite-based substances and advanced saran powder to 90 to 95 parts and 5 to 10 parts by weight is that less than 5 parts of advanced saran powder will have little effect, and if it exceeds 10 parts, it will oxidize. This is not desirable because the hot metal itself is oxidized by the force, and high-grade saran powder is expensive, leading to an increase in the cost of dephosphorization treatment.
以上説明したように、本発明は高度サラン粉を特定量含
有させた石灰系脱燐剤であって、（３）及び（４）の式
で示した高度サラン粉の分解による活性化された酸素及
び塩素、さらに（６）式による脱燐反応が効果的に作用
するので著しく、脱燐能が高められるという効果を有す
る。As explained above, the present invention is a lime-based dephosphorizing agent containing a specific amount of high-grade saran powder, and the activated oxygen is and chlorine, and the dephosphorization reaction according to formula (6) acts effectively, so that the dephosphorization ability is significantly enhanced.
従って、本発明の脱燐剤を溶銑に用いると、十分な脱燐
が行われるので現在行われている転炉における脱燐処理
の負担を軽減することが出来、比較的低コストで炉外に
卦ける溶銑処理によって、低燐鋼が得られる利点がある
。Therefore, when the dephosphorizing agent of the present invention is used for hot metal, sufficient dephosphorization is carried out, which reduces the burden of dephosphorization in the converter, which is currently being carried out, and allows the dephosphorization to be carried out outside the furnace at a relatively low cost. There is an advantage that low phosphorus steel can be obtained by hot metal treatment.
以下実施例をあげて、さらに具体的に本発明を説明する
。EXAMPLES The present invention will be explained in more detail with reference to Examples below.
実施例 １
１００メッシュ以下に粉砕した生石灰９２重量部と市販
の１００メッシュ以下の高度サラン粉８重量部と回転ミ
キサーで均一に混合し脱燐剤とした。Example 1 A dephosphorizing agent was prepared by uniformly mixing 92 parts by weight of quicklime pulverized to 100 mesh or less and 8 parts by weight of commercially available high-grade saran powder of 100 mesh or less using a rotary mixer.
この脱燐剤を温度１４５０℃、Ｓｉ含量０．１優の溶銑
３ｋｇに４重量条添加し３分間スターラーで機械的に撹
拌し脱燐処理を行った。Four weight strips of this dephosphorizing agent were added to 3 kg of hot metal having a Si content of over 0.1 at a temperature of 1450° C., and the mixture was mechanically stirred with a stirrer for 3 minutes to effect dephosphorization.
比較のために従来より公知である生石灰９２重量部とＣ
ａＣｌ２８重量部とを均一混合した脱燐剤を用いて同様
に処理した。For comparison, 92 parts by weight of quicklime and C
The same treatment was carried out using a dephosphorizing agent uniformly mixed with 28 parts by weight of aCl.
これらの結果を別表に示す。実施例 ２
生石灰とミルスケールとを２ＣａＯ−Ｆｅ２０３の組戊
となるように配合し、これをロータリーキルにて温度１
２００℃で焼或した。These results are shown in the attached table. Example 2 Quicklime and mill scale were mixed to form a structure of 2CaO-Fe203, and heated to a temperature of 1 in a rotary kill.
It was fired at 200°C.
これを粉砕して１００メッシュ以下の粉末とした。This was ground into a powder of 100 mesh or less.
その化１ｆｆｌ５ｆｆｉ分及びＸ線回析を行った結果を
第２表に示す。The results of 1ffl5ffi and X-ray diffraction are shown in Table 2.
次に、これを９３重量部と１００メッシュ以下の高度サ
ラン粉７重量部を混合し脱燐剤とした。Next, 93 parts by weight of this was mixed with 7 parts by weight of high-grade saran powder of 100 mesh or less to prepare a dephosphorizing agent.
この脱燐剤を温度１４５０℃、Ｓｉ含量０． １ ’％
の溶銑３ｋｇに５重量弧添加し、これに窒素ガスを３分
間吹込み攪拌しなから脱燐を行った。This dephosphorizing agent was used at a temperature of 1450°C and a Si content of 0. 1'%
5 weight arcs were added to 3 kg of hot metal, and nitrogen gas was blown into the mixture for 3 minutes to perform dephosphorization while stirring.
比較のためにＣａＯ”Ｆｅ２０３ｓ ＣａＣＡ２ を
それぞれ４８．４５．７重量部含有する脱燐剤を用いて
、同様に試験を行った。For comparison, a similar test was conducted using dephosphorizing agents each containing 48.45.7 parts by weight of CaO"Fe203s CaCA2.
これらの結果を第３表に示す。These results are shown in Table 3.
本発明の実施例に示した脱燐率は次の次式によって求め
た。The dephosphorization rate shown in the examples of the present invention was determined by the following formula.
Claims (1)
溶銑用石灰系脱燐剤。 ２ ＣａＯとＦｅ２０３との割合が重量比で０．６〜
１．５であり、しかもこれらの成分が少〈とも９０重量
φ以上含有する粉末９０〜９５重量部と高度サラン粉５
〜１０重量部とを含有してなる溶銑用石灰系脱燐剤。[Claims] 1. A lime-based dephosphorizing agent for hot metal, which contains 10% or less of high-grade saran powder. 2 The ratio of CaO and Fe203 is 0.6 to 0.6 by weight
1.5 and containing 90 to 95 parts by weight of powder containing at least 90 parts by weight of these components and 5 parts by weight of high-grade saran powder.
-10 parts by weight of a lime-based dephosphorizing agent for hot metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5274781A JPS5836046B2 (en) | 1981-04-08 | 1981-04-08 | Lime-based dephosphorizing agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5274781A JPS5836046B2 (en) | 1981-04-08 | 1981-04-08 | Lime-based dephosphorizing agent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57169008A JPS57169008A (en) | 1982-10-18 |
| JPS5836046B2 true JPS5836046B2 (en) | 1983-08-06 |
Family
ID=12923500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5274781A Expired JPS5836046B2 (en) | 1981-04-08 | 1981-04-08 | Lime-based dephosphorizing agent |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5836046B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4788013B2 (en) * | 1999-12-21 | 2011-10-05 | Ｊｆｅスチール株式会社 | Method for producing low phosphorus hot metal |
| JP4857227B2 (en) * | 2007-09-11 | 2012-01-18 | 株式会社クボタ | Working machine |
| BE1023884B1 (en) * | 2016-07-08 | 2017-09-04 | Lhoist Rech Et Developpement Sa | PROCESS FOR PRODUCING BRIQUETTES CONTAINING ACTIVE IRON OXIDE AND BRIQUETTES THUS OBTAINED |
-
1981
- 1981-04-08 JP JP5274781A patent/JPS5836046B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57169008A (en) | 1982-10-18 |
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