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WO2009146573A1 - Sphère composite utilisée pour surveiller de manière précise l’ajout d’oligo-éléments dans l’acier et son procédé de fabrication - Google Patents

Sphère composite utilisée pour surveiller de manière précise l’ajout d’oligo-éléments dans l’acier et son procédé de fabrication Download PDF

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Publication number
WO2009146573A1
WO2009146573A1 PCT/CN2008/001073 CN2008001073W WO2009146573A1 WO 2009146573 A1 WO2009146573 A1 WO 2009146573A1 CN 2008001073 W CN2008001073 W CN 2008001073W WO 2009146573 A1 WO2009146573 A1 WO 2009146573A1
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WO
WIPO (PCT)
Prior art keywords
composite sphere
sphere
ball
composite
core
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.)
Ceased
Application number
PCT/CN2008/001073
Other languages
English (en)
Chinese (zh)
Inventor
唐复平
王晓峰
刘万山
孟劲松
任子平
李德刚
陈本文
王仁贵
张军
王文仲
李镇
张晓军
孙群
栗红
常桂华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Angang Steel Co Ltd
Original Assignee
Angang Steel Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Angang Steel Co Ltd filed Critical Angang Steel Co Ltd
Priority to PCT/CN2008/001073 priority Critical patent/WO2009146573A1/fr
Publication of WO2009146573A1 publication Critical patent/WO2009146573A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • C21C7/0006—Adding metallic additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/16—Metallic particles coated with a non-metal
    • 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
    • C21C7/0075—Treating in a ladle furnace, e.g. up-/reheating of molten steel within the ladle
    • 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
    • C21C7/0056—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires
    • C21C2007/0062—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires with introduction of alloying or treating agents under a compacted form different from a wire, e.g. briquette, pellet

Definitions

  • the invention relates to an off-furnace refining technology for steel making, in particular to a composite sphere for controlling the precise addition of trace elements in steel and a preparation method thereof, and belongs to the technical field of metallurgy.
  • Some trace elements in steel have a significant effect on improving the mechanical properties of the material.
  • boron or rare earth In some engineering machinery steels, in order to improve the hardenability, a small amount of boron is often added to the steel, and the rare earth can refine the grains, purify the grain boundaries, and change the properties of non-metallic inclusions in the steel. , size, quantity and distribution, which significantly improve the toughness and corrosion resistance of steel.
  • the present invention has been made in view of the above problems in the prior art, and its object is to provide a composite sphere which is suitable for precise and stable control of the addition of trace alloying elements in steel during refining.
  • Another object of the present invention is to provide a process for producing the above composite sphere.
  • the accurate yield of the addition of trace alloying elements in steel by the method of the present invention is 70% to 95%.
  • weight ranges of the components of the present invention are summarized by a large number of explorations and tests by the inventors, and each of the raw materials has a good effect in the following weight range.
  • the present invention is achieved by: a composite sphere for controlling the precise addition of trace elements in steel, wherein the core of the composite sphere comprises: a trace element and a swelling agent, and the outer shell of the composite sphere is oxidized Calcium, magnesium oxide or a mixture of calcium oxide and magnesium oxide.
  • the core of the composite sphere is made up of the following raw materials by weight: 0.1% ⁇ 99 of trace elements; 1% ⁇ 70% of expansion agent; 0 ⁇ 30% of binder.
  • the preferred weight percentage of each raw material of the core of the composite sphere is: trace element 30% ⁇ 80%; expander 8% ⁇ 55%; binder 5% ⁇ 15%.
  • the outer shell of the composite sphere further comprises 0 to 20% of a binder.
  • the trace elements include: Fe-18% B intermediate alloy, Fe-30% RE intermediate alloy.
  • RE is a mixed rare earth rich in Ce, La, a mixed rare earth rich in Ce or Nd, or a pure rare earth Ce, Nd, La, Gd, Sm.
  • the expansion agent is composed of a mixture of calcium carbonate, magnesium carbonate or calcium carbonate and magnesium carbonate.
  • the binder is any one or more of clay, ordinary cement, bentonite, and water glass.
  • the carbonate as a swelling agent in the above composite sphere effectively promotes diffusion and homogenization of trace elements in the molten steel; calcium oxide and magnesium oxide as stabilizers can improve the thermal stability of the composite sphere;
  • a method of preparing a composite sphere for controlling the precise addition of trace elements in steel comprises the following steps:
  • drying drying the above-mentioned mixed raw materials in a dryer, drying temperature It is 80 ° C ⁇ 150 ° C, the time is 2 h ⁇ 8 h.
  • shell According to the ratio, the powder required for the outer shell is thoroughly mixed in the mixer.
  • the activity of calcium oxide and magnesium oxide is 200ml, and the mixing time is l h ⁇ 3h.
  • (e) Sphere compounding The prepared core ball and the shell material are compositely ball-formed on a ball making machine by a rolling method, the thickness of the outer shell is 0.1 mm to 20 mm, and the prepared composite sphere size is between 1.2 mm and 80 mm. Just fine.
  • the composite sphere of the present invention has a high thermal stability, a 160 CTC time-delay, a reaction time of 5 s to 35 s, a high compactness, and a compressive strength of 5 MPa to 30 MPa, so that the present invention can sufficiently invade the inside of the molten steel. Therefore, the stable and effective recovery of trace elements in steel can be significantly improved, and the yield can reach 70% to 95%. Therefore, it is more accurate to ensure the total amount of trace elements and solid solution in the steel, thereby effectively improving the performance of the steel and meeting the user's requirements.
  • the composite sphere of the present invention has high compressive strength so as not to be broken during transportation, storage and use.
  • the content of trace elements in the steel is sampled and analyzed.
  • the yield of the trace element in the finished steel is 70% ⁇ 95%.
  • a composite sphere for controlling the precise addition of trace elements in steel wherein the core of the composite sphere comprises: a trace element and a swelling agent, and the outer shell of the composite sphere is composed of a mixture of calcium oxide or magnesium oxide or calcium oxide and magnesium oxide. .
  • the composite sphere of the invention is prepared according to the weight percentage of the following raw materials - According to the formula, the core is made of Fe-18%B intermediate alloy 0.1%, calcium carbonate 70%, clay 29.9%; the outer shell is prepared by mixing 1% ordinary cement with calcium oxide.
  • the preparation method of the composite sphere of the invention comprises the following steps:
  • (c) ball making The above-mentioned dried raw materials are ball-formed on a disc granulator by a rolling method, and the rotation speed of the disc granulator is 400 to 1600 r/min, and the control of the sphere size is determined by sieving to obtain The diameter of the sphere is from 1 mm to 10 mm.
  • shell The powder required to take the outer shell according to the above ratio is thoroughly mixed in the mixer, the activity of calcium oxide is 200ml, and the mixing time is lh ⁇ 2h.
  • Sphere compounding The prepared core ball and the shell material are compositely ball-formed on a disc granulator by a rolling method, and the thickness of the outer shell is 0.1 mm to 2 mm, and the size of the sphere is controlled by sieving. The finished composite sphere size is 1.2mn! ⁇ 14mm can be.
  • overall drying The composite sphere prepared in the above step is dried in a dryer, and the drying temperature is 80 ° C to 120 ° C, and the time is 10 h to 20 h.
  • the composite sphere of the present invention is prepared in the weight percentage of the following raw materials:
  • the core is made of Fe-18%B master alloy 55%, calcium carbonate 44%, bentonite 1%; the shell is prepared by mixing 10% clay with a mixture of calcium oxide and magnesium oxide.
  • the preparation method of the composite sphere of the invention comprises the following steps:
  • (C) Ball raw material after the drying process using the method of rolling the ball on a disc granulator, disc granulator speed of 400 ⁇ 1600r / mi n, the size of the sphere is determined by sieving the control, The diameter of the obtained sphere is from 1 mm to 15 mm.
  • shell The powder required for the above proportioning shell is thoroughly mixed in the mixer, the activity of calcium oxide is 200ml, and the mixing time is l ⁇ 3h.
  • Sphere compounding The prepared core ball and the shell material are compositely ball-formed on a disc granulator by a rolling method, and the thickness of the outer shell is 0.1 mm to 5 mm, and the size of the sphere is controlled by sieving. The prepared composite sphere size is 1.2mm ⁇ 25mm.
  • the whole supply is dry: The composite sphere prepared in the above step is dried in a dryer, and the drying temperature is 60 ° C to 120 ° C, and the time is 10 h to 20 h.
  • the composite sphere of the present invention is prepared in the weight percentage of the following raw materials:
  • the core is made of Fe-30%RE master alloy 99%, RE is rare earth strontium-based mixed rare earth, magnesium carbonate 1%; the shell is prepared by mixing 15% water glass with calcium oxide.
  • the preparation method of the composite sphere of the invention comprises the following steps:
  • (c) ball making The above-mentioned dried raw materials are ball-formed on a disc granulator by a rolling method, and the rotation speed of the disc granulator is 400 to 1600 r/min, and the control of the sphere size is determined by sieving to obtain Ball The diameter of the body is from lmm to 40mm.
  • shell The powder required to take the outer shell according to the above ratio is thoroughly mixed in the mixer, the activity of calcium oxide is 200ml, and the mixing time is lh ⁇ 3h.
  • Sphere composite The core ball and the outer shell material are compositely ball-formed on a disc granulator by a rolling method, and the thickness of the outer shell is 0.1 mm to 20 mm, and the size of the sphere is controlled by sieving. The prepared composite sphere size can be 1.2mm ⁇ 80mm.
  • overall drying The composite sphere prepared in the above step is dried in a dryer, and the drying temperature is 100 ° C to 200 ° C, and the time is 10 h to 24 h.
  • the composite sphere of the present invention is prepared in the weight percentage of the following raw materials:
  • the core is made of Fe-30%RE master alloy 99%, RE is rare earth strontium-based mixed rare earth, magnesium carbonate 1%; the shell is a mixture of calcium oxide and magnesium oxide (the binder is zero).
  • the preparation method of the composite sphere of the invention comprises the following steps:
  • shell The powder required to take the outer shell according to the above ratio is thoroughly mixed in the mixer, the activity of magnesium oxide is 200ml, and the mixing time is lh ⁇ 3h.
  • Sphere compounding The prepared core ball and the shell material are compositely ball-formed on a disc granulator by a rolling method, and the thickness of the outer shell is 0.1 mm to 20 mm, and the size of the sphere is controlled by sieving. Prepared composite sphere size It can be 1.2mm ⁇ 75mm.
  • overall drying The composite sphere prepared in the above steps is dried in a dryer, the drying temperature is 60 ° C ⁇ 120 C, the time is 101! ⁇ 24h.
  • the composite sphere of the invention is prepared according to the weight percentage of the following raw materials - 80% of the Fe-30% Ce intermediate alloy is taken according to the formula ratio, 15% of the mixture of calcium carbonate and magnesium carbonate is taken according to 2:1, and the clay is 4%. Water glass 1%;
  • the outer shell is prepared by mixing 10% clay and ordinary cement and a mixture of bentonite and water glass with a mixture of 1:1 calcium oxide and magnesium oxide.
  • the preparation method of the composite sphere of the invention comprises the following steps:
  • shell The powder required for the outer shell according to the above ratio is thoroughly mixed in the mixer.
  • the activity of calcium oxide and magnesium oxide is 200 ml, and the mixing time is lh ⁇ 3h.
  • Sphere compounding The prepared core ball and the shell material are compositely ball-formed on a disc granulator by a rolling method, and the thickness of the outer shell is 0.1 mm to 10 mm, and the size of the sphere is controlled by sieving.
  • the finished composite sphere size is 1.2mn! ⁇ 40mm can be. (0.
  • Overall drying The composite sphere prepared in the above step is dried in a dryer, and the drying temperature is 60° (: ⁇ 150 ° C, time is 10h ⁇ 24h.
  • the composite sphere of the present invention is prepared in the weight percentage of the following raw materials: According to the formulation ratio, the core is made of Fe-30% Nd master alloy 55%, magnesium carbonate 30%, bentonite 10%, water glass 5%; the shell is calcium oxide (the binder is zero).
  • the preparation method of the composite sphere of the invention comprises the following steps:
  • shell The powder calcium oxide required for the outer shell, the activity of calcium oxide is 200ml, the mixing time is lh ⁇ 3h
  • the sphere compound the prepared core sphere and shell
  • the raw materials are compositely ball-formed on a disc granulator by a rolling method, and the thickness of the outer casing is 0.1 mm to 15 mm.
  • the size of the sphere is controlled by sieving, and the prepared composite sphere has a size of 1.2 mm to 60 mm.
  • overall drying The composite sphere prepared in the above step is dried in a dryer, and the drying temperature is 70 ° C to 150 ° (:, the time is 10 h to 24 h.
  • the composite sphere of the present invention is prepared in the weight percentage of the following raw materials:
  • the core is made of Fe-30% La intermediate alloy 65%, calcium carbonate 25%, ordinary cement 2%, bentonite 8%; the shell is prepared by mixing 8% bentonite with calcium oxide.
  • the preparation method of the composite sphere of the invention comprises the following steps:
  • shell The powder required to take the shell according to the above ratio is thoroughly mixed in the mixer.
  • the activity of calcium oxide is 200ml, and the mixing time is 11! ⁇ 3h.
  • Sphere compounding The prepared core ball and the shell material are compositely ball-formed on a disc granulator by a rolling method, and the thickness of the outer shell is 0.1 mm to 20 mm, and the size of the sphere is controlled by sieving.
  • the prepared composite sphere size can be 1.2mm ⁇ 48mm.
  • overall drying The composite sphere prepared in the above step is dried in a dryer, and the drying temperature is 80 ° C to 180 ° C, and the time is 10 h to 24 h.
  • the composite sphere of the present invention is prepared in the weight percentage of the following raw materials:
  • the core is made of Fe-30%Gd master alloy 70%, according to 1:1, calcium carbonate and magnesium carbonate 20%, clay 7%, water glass 3%; shell contains 20% clay and calcium oxide and
  • the magnesium oxide mixture is prepared by mixing.
  • the preparation method of the composite sphere of the invention comprises the following steps:
  • shell The powder required for the outer shell according to the above ratio is thoroughly mixed in the mixer.
  • the activity of calcium oxide and magnesium oxide is 200 ml, and the mixing time is lh ⁇ 3h.
  • Sphere compounding The prepared core ball and the shell material are compositely ball-formed on a disc granulator by a rolling method, and the thickness of the outer shell is 0.1 mm to 10 mm, and the size of the sphere is controlled by sieving. The finished composite sphere size is 1.2mn! ⁇ 50mm can be.
  • overall drying The composite sphere prepared in the above step is dried in a dryer, and the drying temperature is 80 ° C ⁇ 150 ° C, the time is 101! ⁇ 24h.
  • the composite sphere of the present invention is prepared in the weight percentage of the following raw materials:
  • the core is made of Fe-30%Sm master alloy 60%, calcium carbonate 30%, clay 7%, water glass 3%; the shell is magnesium oxide (the binder is zero).
  • the preparation method of the composite sphere of the invention comprises the following steps:
  • shell The powder magnesium oxide required for the outer shell is used, the activity of magnesium oxide is 200m, and the mixing time is lh ⁇ 3h.
  • Sphere compounding Rolling the prepared core sphere and shell material The method is to perform composite ball making on a disc granulator. The thickness of the outer casing is 0.1 mm to 10 mm. The size of the sphere is controlled by screening, and the prepared composite sphere has a size of 1.2 mm to 45 mm.
  • the composite sphere of the present invention is prepared in the weight percentage of the following raw materials:
  • the core is made of Fe-30%Sm intermediate alloy 30%, calcium carbonate 60%, ordinary cement 6 %, water glass 4%; the outer shell is prepared by mixing 10% bentonite with magnesium oxide.
  • the preparation method of the composite sphere of the invention comprises the following steps:
  • casing The powder required to take the outer casing according to the above ratio is thoroughly mixed in the mixer, and the activity of magnesium oxide is 200 ml.
  • Mixing time is lh ⁇ 3h
  • ball composite The prepared core ball and the shell material are compositely ball-formed on a disc granulator by rolling method, and the thickness of the outer shell is 0.1mm ⁇ 15mm, and sieved The size of the sphere is controlled and determined, and the size of the prepared composite sphere is 1.2 mm to 40 mm.
  • overall drying The composite sphere prepared in the above step is dried in a dryer, and the drying temperature is 70 ° C to 160 ° C, and the time is 10 h to 24 h.
  • Example 11 The composite sphere of the present invention is prepared in the weight percentage of the following raw materials:
  • the core is made of Fe-18%B intermediate alloy 10%, calcium carbonate 70%, clay 20%; the outer shell is prepared by mixing 2% ordinary cement with calcium oxide.
  • the preparation method of the composite sphere of the present invention is the same as that of the example 1, and will not be described.
  • the composite sphere of the present invention is prepared in the weight percentage of the following raw materials:
  • the core is made of Fe-30% La intermediate alloy 5%, calcium carbonate 65%, ordinary cement 28%, bentonite 2%; the outer shell is prepared by mixing 20% bentonite with calcium oxide.
  • the composite sphere prepared by the above method for controlling the precise addition of trace elements in steel is dried and then cooled into an ultra-thin high-strength polyethylene plastic bag, and the weight of each bag is 10 kg ⁇ 30 kg / bag, and the packaging is ensured. Sealed well, protected from moisture, and used within 20 days.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)

Abstract

Une sphère composite utilisée pour l’affinage en poche ainsi que son procédé de fabrication. Ladite sphère composite peut être utilisée pour surveiller de manière précise l’ajout d’oligo-éléments dans l’acier et est constituée d’une âme et d’une enveloppe, l’âme comprenant des oligo-éléments et un agent expansif, l’enveloppe étant composée d’oxyde de calcium, d’oxyde de magnésium ou d’un mélange d’oxyde de calcium et d’oxyde de magnésium. Ladite sphère composite permet d’accroître la stabilité des oligo-éléments dans l’acier et d’améliorer la récupération, avec un taux de récupération entre 70 et 95%.
PCT/CN2008/001073 2008-06-02 2008-06-02 Sphère composite utilisée pour surveiller de manière précise l’ajout d’oligo-éléments dans l’acier et son procédé de fabrication Ceased WO2009146573A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2008/001073 WO2009146573A1 (fr) 2008-06-02 2008-06-02 Sphère composite utilisée pour surveiller de manière précise l’ajout d’oligo-éléments dans l’acier et son procédé de fabrication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2008/001073 WO2009146573A1 (fr) 2008-06-02 2008-06-02 Sphère composite utilisée pour surveiller de manière précise l’ajout d’oligo-éléments dans l’acier et son procédé de fabrication

Publications (1)

Publication Number Publication Date
WO2009146573A1 true WO2009146573A1 (fr) 2009-12-10

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PCT/CN2008/001073 Ceased WO2009146573A1 (fr) 2008-06-02 2008-06-02 Sphère composite utilisée pour surveiller de manière précise l’ajout d’oligo-éléments dans l’acier et son procédé de fabrication

Country Status (1)

Country Link
WO (1) WO2009146573A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104498668A (zh) * 2014-11-28 2015-04-08 钢铁研究总院 一种复合球体形式的钢水净化剂及生产方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5486416A (en) * 1977-12-23 1979-07-10 Ibiden Co Ltd Hot iron desulfurizing agent and production thereof
JPS5486417A (en) * 1977-12-23 1979-07-10 Ibiden Co Ltd Hot iron desulfurizing agent and production thereof
JPS5486418A (en) * 1977-12-23 1979-07-10 Ibiden Co Ltd Hot iron desulfurizing agent and production thereof
CN1037543A (zh) * 1988-04-14 1989-11-29 阿菲瓦尔 生铁脱硫方法
CN1164576A (zh) * 1997-04-16 1997-11-12 由淼 双层颗粒状阻燃球化剂组合物及其制备方法
CN2734768Y (zh) * 2004-10-19 2005-10-19 王家仁 钝化镁粒
CN1804054A (zh) * 2006-01-17 2006-07-19 沈阳东北大学冶金技术研究所 一种钢水脱氧用包芯线
KR20070071889A (ko) * 2005-12-30 2007-07-04 주식회사 인텍 고청정강 제조용 탈산 내화조성물 및 그 제조방법

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5486416A (en) * 1977-12-23 1979-07-10 Ibiden Co Ltd Hot iron desulfurizing agent and production thereof
JPS5486417A (en) * 1977-12-23 1979-07-10 Ibiden Co Ltd Hot iron desulfurizing agent and production thereof
JPS5486418A (en) * 1977-12-23 1979-07-10 Ibiden Co Ltd Hot iron desulfurizing agent and production thereof
CN1037543A (zh) * 1988-04-14 1989-11-29 阿菲瓦尔 生铁脱硫方法
CN1164576A (zh) * 1997-04-16 1997-11-12 由淼 双层颗粒状阻燃球化剂组合物及其制备方法
CN2734768Y (zh) * 2004-10-19 2005-10-19 王家仁 钝化镁粒
KR20070071889A (ko) * 2005-12-30 2007-07-04 주식회사 인텍 고청정강 제조용 탈산 내화조성물 및 그 제조방법
CN1804054A (zh) * 2006-01-17 2006-07-19 沈阳东北大学冶金技术研究所 一种钢水脱氧用包芯线

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104498668A (zh) * 2014-11-28 2015-04-08 钢铁研究总院 一种复合球体形式的钢水净化剂及生产方法

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