scholarly journals Generation of Pyroxene-Based Porous Ceramics from Steel Refining Slag

2021 ◽  
Vol 61 (7) ◽  
pp. 2041-2047
Author(s):  
Yu Li ◽  
Weitao Tang ◽  
Hongjian Sheng ◽  
Yindong Yang ◽  
Alex Mclean
Keyword(s):  
Porous Ceramics ◽  
Refining Slag ◽  
Steel Refining

scholarly journals Obtaining of Granulated Gypsum Anhydrite on the Basis of Technogenic Wastes of Chemical and Metallurgical Complex for Use in Portland Cement Production

2020 ◽  
Author(s):  
Alexander Ponomarenko
Keyword(s):  
Mass Transfer ◽  
Sulfuric Acid ◽  
Portland Cement ◽  
Processing Time ◽  
Refining Slag ◽  
Current Output ◽  
Cement Production ◽  
Production Of Hydrogen ◽  
Steel Refining ◽  
Technogenic Wastes

The composition and properties of fluorine–anhydrite and steel–refining slag which are wastes of production of hydrogen fluoride and steel were determined. It is established that fluorine–anhydrite of the current output does not meet the requirements to materials for the production of Portland cement. Therefore to improve the technical and consumer properties of fluorine-anhydrite (for increasing the amount of CaSO4 ⋅2H2O and neutralization of H2SO4) the studies of its’ conditioning processes with steel– refining slag were carried out. It was found that the mass transfer coefficient of sulfuric acid through the capillary and the degree of its neutralization by slag depend on the dispersion of fluorine–anhydrite, its porosity and initial acidity. The most effective binding of sulfuric acid occurs with the introduction of slag in stoichiometric amounts, the size of fluorine–anhydrite granules up to 20 mm and a processing time of 60 minutes. After storage in air-humid conditions for 12 hours of fluorine–anhydrite treated with slag the strength of its granules, the amount of dihydrate gypsum and toxicological properties meet the requirements. Keywords: techno–gypsum, refining slag, neutralization, conditioning, gypsum stone, Portland cement

Cementitious binders from activated stainless steel refining slag and the effect of alkali solutions

2015 ◽  
Vol 286 ◽  
pp. 211-219 ◽  
Author(s):  
Muhammad Salman ◽  
Özlem Cizer ◽  
Yiannis Pontikes ◽  
Ruben Snellings ◽  
Lucie Vandewalle ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Refining Slag ◽  
Alkali Solutions ◽  
Steel Refining

Use of Recycled Calcium Slag for Clean Steel Refining

2009 ◽  
Vol 620-622 ◽  
pp. 635-638 ◽  
Author(s):  
Dong Ping Zhan ◽  
Hui Shu Zhang ◽  
Wei Gong ◽  
Zhou Hua Jiang ◽  
Ji Cheng He
Keyword(s):  
Pipeline Steel ◽  
Titanium Content ◽  
Bearing Steel ◽  
Refining Slag ◽  
Total Oxygen ◽  
Clean Steel ◽  
Gcr15 Bearing Steel ◽  
Steel Refining ◽  
Calcium Metal ◽  
Plant Trials

Calcium slag (CS) is a by-product generated during smelting to extract calcium metal from the ore by aluminothermic reduction method. The melting point, melting speed, viscosities, surface tensions and the refining effects of CS and normal premelted refining slag (NPRS) were measured in the laboratory. Then the plant trials were done in a 150 tons Ladle Furnace (LF) in a steelmaking plant during the refining of clean steel. The results show that the properties of CS are similar to those of NPRS, and CS is a good refining agent not only in laboratory experiment but also in industrial production. By using CS, the average final sulfur content in X70 pipeline steel reaches 25×10-6; the total oxygen content in GCr15 bearing steel is 5×10-6~8×10-6; the titanium content in GCr15 bearing steel is less than 20×10-6 and lower than the steels refined by using NPRS.

scholarly journals Stabilization of Metals-contaminated Farmland Soil using Limestone and Steel Refining Slag

2014 ◽  
Vol 19 (5) ◽  
pp. 1-8 ◽  
Author(s):  
Jeong-Muk Lim ◽  
Youngnam You ◽  
Seralathan Kamala-Kannan ◽  
Sae-Gang Oh ◽  
Byung-Taek Oh
Keyword(s):  
Refining Slag ◽  
Farmland Soil ◽  
Steel Refining

Microscopy of porous ceramics

1989 ◽  
Vol 47 ◽  
pp. 438-439
Author(s):  
H. M. Kerch ◽  
R. A. Gerhardt
Keyword(s):  
Porous Ceramics ◽  
Specimen Preparation ◽  
High Porosity ◽  
Ion Milling ◽  
Forming Process ◽  
Preparation Methods ◽  
Pore Texture ◽  
Proper Design ◽  
And Function ◽  
Function Information

Highly porous ceramics are employed in a variety of engineering applications due to their unique mechanical, optical, and electrical characteristics. In order to achieve proper design and function, information about the pore structure must be obtained. Parameters of importance include pore size, pore volume, and size distribution, as well as pore texture and geometry. A quantitative determination of these features for high porosity materials by a microscopic technique is usually not done because artifacts introduced by either the sample preparation method or the image forming process of the microscope make interpretation difficult.Scanning electron microscopy for both fractured and polished surfaces has been utilized extensively for examining pore structures. However, there is uncertainty in distinguishing between topography and pores for the fractured specimen and sample pullout obscures the true morphology for samples that are polished. In addition, very small pores (nm range) cannot be resolved in the S.E.M. On the other hand, T.E.M. has better resolution but the specimen preparation methods involved such as powder dispersion, ion milling, and chemical etching may incur problems ranging from preferential widening of pores to partial or complete destruction of the pore network.

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