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calcium refining stainless steel and technology

Effect of Calcium Content on Inclusions during LF

2021-4-27 · 3) Ruipu Technology Group Co., Ltd., Qingtian 323903, China. Abstract: During the ladle furnace (LF) refining process of AISI 321 stainless steel, the effects of three heats with different calcium contents on the evolution of inclusions were investigated. The size,

Effect of calcium treatment on inclusions in Si-Mn-killed ...

2020-9-1 · In the current study, two plant trials for the ladle refining process without and with the calcium treatment were compared to investigate the effect of the calcium treatment on the inclusion deformation in Si-Mn-killed 18Cr-8Ni stainless steels. The total aluminum rose from 10 ppm to 25 ppm due to the slag and steel reaction, increasing the Al ...

Effect of calcium content on inclusions during the ladle ...

The effect of three heat processes with different calcium contents on the evolution of inclusions during the ladle furnace refining process of AISI 321 stainless steel was investigated. The size, morphology, and composition of the inclusions were analyzed by scanning electron microscopy and energy-dispersive X-ray spectroscopy. After the addition of aluminum and titanium, the primary oxide in ...

A New Double Calcium Treatment Method for Clean Steel

Cheng-Bin Shi, Wen-Tao Yu, Hao Wang, Jing Li, Min Jiang, Simultaneous Modification of Alumina and MgO·Al2O3 Inclusions by Calcium Treatment During Electroslag Remelting of Stainless Tool Steel, Metallurgical and Materials Transactions B, 10.1007/s11663-016-0771-1, 48, 1, (146-161), (2016).

(PDF) EXPERIENCES WITH CALCIUM TREATMENT OF STEEL

Calcium (Ca) treatment is commonly used to control the shape and composition of oxide and sulphide inclusions in aluminium (Al) and Al-Si killed steels. Calcium reacts with solid Al2O3 inclusions ...

Smelting and Refining Technology Processes of Stainless

2013-12-9 · Smelting and Refining Technology Processes of Stainless Steel Inquiries : 1815 - 2013-12-9 11:46:35 This is because the chemical composition of every stainless steel product reacts differently in terms of resistance to corrosion.

About Us | Multimetco

ALU-CAL-fused calcium aluminate and 409 stainless steel are extracted from the catalytic converter hulls and sold in supersacks (ALU-CAL and stainless steel) or bulk trailer loads (stainless steel) and is sold to high-grade steel manufacturers. We also process catalysts and provide the precious metals to the owner on a toll-refining basis.

A Study of EAF High-Chromium Stainless Steelmaking

2011-5-16 · shown that the foaming index of the EAF highchromium stainless steelmaking slag may be on - its minimum as the slag’s basicity takes a value in the range of 1.2 1.5. A basicity value of – around 1.50 1.60 can – be suitable for enhancing the foaming index of the slag, during the refining period in EAF high-chromium stainless steelmaking.

Material Corrosion Resistance Guide - Fluid Technology

2013-3-1 · Housings and frames can be furnished in all stainless steel, aluminum or Monel. The exact grade of metal used depends on the nature of the installation. Unless otherwise specified, #304 housings will be furnished when stainless steel is ordered. #316 stainless steel is also available. All Hartzell fans and blowers for corrosive applications

Influence of refining process and utilization of different ...

2020-6-25 · Ti-stabilized 321 stainless steel was prepared using an electric arc furnace, argon oxygen decarburization (AOD) furnace, ladle furnace (LF), and continuous casting processes. In addition, the effect of refining process and utilization of different slags on the evolution of inclusions, titanium yield, and oxygen content was systematically investigated by experimental and thermodynamic analysis ...

Calcium Treatment for FeSi-killed Fe-13 Pct Cr Stainless ...

2018-2-15 · Calcium treatment of Fe-13 pct Cr stainless steel, with inclusion modification as its main purpose, was evaluated on a laboratory scale. The stability diagram of Ca-Al was obtained using the FactSage software and could be divided into three parts based on the [Al] content: the ultra-low-Al

Calcium in Steels – IspatGuru

2014-12-16 · Calcium in Steels. Calcium (Ca) (atomic number 20 and atomic weight 40.08) has density of 1.54 gm/cc. Melting point of Ca is 842 deg C and boiling point is 1484 deg C. Ca additions are made during steel making for refining, deoxidation,

REDUCTION OF CHROMIUM OXIDES WITH CALCIUM

2021-3-16 · of the steel scrap and heating of the charged material. REDUCTION OF CHROMIUM Besides the used technology for the reduction with silicon or aluminum and the carbon blowing, the use of blowing of calcium carbide was also reported [13]. When calcium carbide reacts with oxides in the slag, the products of the reaction are chromium, lime and carbon

Preparation of Calcium Sulfate Hemihydrate Using

2018-6-1 · (2001). Preparation of Calcium Sulfate Hemihydrate Using Stainless Steel Refinery Sludge and Waste Sulfuric Acid. Geosystem Engineering: Vol. 4, No. 3, pp. 71-76.

Refining technology for the recycling of stainless steel ...

1994-8-1 · @article{osti_10186422, title = {Refining technology for the recycling of stainless steel radioactive scrap metals, FY 94 bi-annual report}, author = {Mizia, R E and Atteridge, D G and Buckentin, J and Carter, J and Davis, H L and Devletian, J H and Scholl, M R and Turpin, R B and Webster, S L}, abstractNote = {The research addressed under this project is the recycling of metallic nuclear ...

Smelting and Refining Technology Processes of Stainless

2013-12-9 · Smelting and Refining Technology Processes of Stainless Steel Inquiries : 1815 - 2013-12-9 11:46:35 This is because the chemical composition of every stainless steel product reacts differently in terms of resistance to corrosion.

About Us | Multimetco

ALU-CAL-fused calcium aluminate and 409 stainless steel are extracted from the catalytic converter hulls and sold in supersacks (ALU-CAL and stainless steel) or bulk trailer loads (stainless steel) and is sold to high-grade steel manufacturers. We also process catalysts and provide the precious metals to the owner on a toll-refining basis.

Effect of Phase Solidification Sequence in Stainless Steel ...

2018-8-25 · Effect of Phase Solidification Sequence in Stainless Steel on Grain Refining Efficiency Dustin A. Arvola 1, Ronald J. O’Malley , Simon N. Lekakh , Laura N. Bartlett 1Missouri University of Science and Technology Materials Science & Engineering Dept.

Material Corrosion Resistance Guide - Fluid Technology

2013-3-1 · Housings and frames can be furnished in all stainless steel, aluminum or Monel. The exact grade of metal used depends on the nature of the installation. Unless otherwise specified, #304 housings will be furnished when stainless steel is ordered. #316 stainless steel is also available. All Hartzell fans and blowers for corrosive applications

The control of inclusion composition to prevent the rust ...

2014-7-8 · The annual production of ferritic stainless steel sheet and coil by Nippon Steel Corporation has reached about 200 thousand tonnes, which is comparable to that of austenitic stainless steel. Through the development of refining techniques, extra low carbon ferritic stainless steels with improved formability, corrosion resistance, weldability etc.

Calcium in Steels – IspatGuru

2014-12-16 · Calcium in Steels. Calcium (Ca) (atomic number 20 and atomic weight 40.08) has density of 1.54 gm/cc. Melting point of Ca is 842 deg C and boiling point is 1484 deg C. Ca additions are made during steel making for refining, deoxidation,

Refining technology for the recycling of stainless steel ...

1994-8-1 · @article{osti_10186422, title = {Refining technology for the recycling of stainless steel radioactive scrap metals, FY 94 bi-annual report}, author = {Mizia, R E and Atteridge, D G and Buckentin, J and Carter, J and Davis, H L and Devletian, J H and Scholl, M R and Turpin, R B and Webster, S L}, abstractNote = {The research addressed under this project is the recycling of metallic nuclear ...

Smelting and Refining Technology Processes of Stainless

2013-12-9 · Smelting and Refining Technology Processes of Stainless Steel Inquiries : 1815 - 2013-12-9 11:46:35 This is because the chemical composition of every stainless steel product reacts differently in terms of resistance to corrosion.

wINCo.1198 UC-510 DECONTAMINATION OF METALS

demonstrate that stagging decontamination of uranium and plutonium from steel and stainless steel is a potentially effective treatment technology. Based on trends found in the literature, basic calcium-aluminum-silicate slags (with additives such as ferric oxide and calcium fluoride) appear to be effective steel decontaminators.

Effect of Phase Solidification Sequence in Stainless Steel ...

2018-8-25 · Effect of Phase Solidification Sequence in Stainless Steel on Grain Refining Efficiency Dustin A. Arvola 1, Ronald J. O’Malley , Simon N. Lekakh , Laura N. Bartlett 1Missouri University of Science and Technology Materials Science & Engineering Dept.

About Us | Multimetco

ALU-CAL-fused calcium aluminate and 409 stainless steel are extracted from the catalytic converter hulls and sold in supersacks (ALU-CAL and stainless steel) or bulk trailer loads (stainless steel) and is sold to high-grade steel manufacturers. We also process catalysts and provide the precious metals to the owner on a toll-refining basis.

Technology - SMR premium

2021-8-25 · Secondary Melting / Refining / Remelting. Argon Oxygen Decarburization (AOD) This is a special converter, in which the carbon content of the stainless steel heats is reduced to the targeted specifications by injection blowing of argon and oxygen mixtures. Also final alloy additions can be made in the AOD to reach the exact chemistry.

Development and Prospects of Refining Techniques in ...

The development of refining techniques in the steelmaking process over the last 60 years and the prospects for the future were reviewed. In Japan, hot metal pretreatment started in the 1960s with the aim of reducing refining costs and improving quality, and its purposes have now transitioned to meeting new requirements for reduced treatment time, reuse of steelmaking slag and use of diverse ...

Stainless Steel Manufacturing Processes – IspatGuru

2014-5-4 · Stainless Steel Manufacturing Processes. Stainless steels contain from 10 % to 30 % chromium. These steels also contain varying amounts of nickel, molybdenum, copper, sulphur, titanium, and niobium etc. The majority of production of stainless

The control of inclusion composition to prevent the rust ...

2014-7-8 · The annual production of ferritic stainless steel sheet and coil by Nippon Steel Corporation has reached about 200 thousand tonnes, which is comparable to that of austenitic stainless steel. Through the development of refining techniques, extra low carbon ferritic stainless steels with improved formability, corrosion resistance, weldability etc.