Microstructure Change of Air Quenched Steel Slag and Its Hydraulic Activity

2015 ◽  
Author(s):  
X. M. Shen ◽  
G. Q. Cheng ◽  
L. L. Song ◽  
L. S. Li ◽  
H. D. Jiang
Keyword(s):  
Steel Slag ◽  
Microstructure Change ◽  
Hydraulic Activity ◽  
Quenched Steel

Structure characterization and grinding performance of gas-quenched steel slag abrasive

2020 ◽  
Author(s):  
Jing-jing Pei ◽  
Jin-hu Wu ◽  
Wen-qing Huo ◽  
Yu-zhu Zhang ◽  
Hong-wei Xing ◽  
...  
Keyword(s):  
Steel Slag ◽  
Structure Characterization ◽  
Grinding Performance ◽  
Quenched Steel

Investigation of Properties of Air-Quenched Steel Slag as Sandblasting Abrasive

JOM ◽  
2021 ◽  
Author(s):  
Wen-feng Gu ◽  
Jiang Diao ◽  
Liang Liu ◽  
Wen-sun Ge ◽  
Hong-yi Li ◽  
...  
Keyword(s):  
Steel Slag ◽  
Quenched Steel

Preparation and performance analysis of gas-quenched steel slag beads

2020 ◽  
Vol 117 (1) ◽  
pp. 105
Author(s):  
Hui Wang ◽  
Wei Zhang ◽  
Chao Liu ◽  
Hongwei Xing ◽  
Chen Guo ◽  
...  
Keyword(s):  
Formation Rate ◽  
Steel Slag ◽  
Elimination Rate ◽  
Fine Aggregate ◽  
Quenching Rate ◽  
Bead Formation ◽  
Bof Slag ◽  
Gas Quenching ◽  
Quenched Steel ◽  
Bf Slag

The low utilization rate of steel slag in China has exposed serious environmental and social problems. In the present work, the basic oxygen furnace (BOF) slag was modified by blast furnace (BF) slag and then beaded by the means of gas quenching. The gas-quenching rate, bead formation rate, physical properties, microscopic characteristics and free lime (f-CaO) of gas-quenched slag beads were analyzed to broaden the utilization of BOF slag. The results show that the more BF slag is added, the higher the gas-quenching rate is, and the lower the bead formation rate becomes. When no BF slag is added, the beads are mainly composed of magnetite, limonite and melilite. After BF slag is added, a large amount of glass phase and a little amount of Ca2SiO4 and MgO are found in beads. The content of f-CaO beads decreases after the modified slag is gas quenched at high temperature. Moreover, the more BF slag is added, the higher the elimination rate of f-CaO becomes. Considering the industry standard of steel slag sand in China as well as the gas-quenching rate, physical and chemical properties, the gas-quenched steel slag beads with 5 and 15% BF slag better meet the medium sand standard, which can be used as fine aggregate.

Microfluidics of blood in blood vessels stenosis

2016 ◽  
Vol 11 (2) ◽  
pp. 210-217 ◽  
Author(s):  
A.T. Akhmetov ◽  
A.A. Valiev ◽  
A.A. Rakhimov ◽  
S.P. Sametov ◽  
R.R. Habibullina
Keyword(s):  
Blood Flow ◽  
Blood Vessels ◽  
Hydraulic Resistance ◽  
Microfluidic Device ◽  
Human Body ◽  
Vascular System ◽  
Hydrodynamic Conditions ◽  
Microstructure Change ◽  
Healthy Part

It is mentioned in the paper that hydrodynamic conditions of a flow in blood vessels with the stenosis are abnormal in relation to the total hemodynamic conditions of blood flow in a vascular system of a human body. A microfluidic device developed with a stepped narrowing for studying of the blood flow at abnormal conditions allowed to reveal blood structure in microchannels simulating the stenosis. Microstructure change is observed during the flow of both native and diluted blood through the narrowing. The study of hemorheological properties allowed us to determine an increasing contribution of the hydraulic resistance of the healthy part of the vessel during the stenosis formation.

PROPERTIES IMPROVEMENT AND HYDROPHOBICITY PREVENTION OF PEAT SOIL IN OIL PALM PLANTATION THROUGH STEEL SLAG APPLICATION

2016 ◽  
Vol 24 (1) ◽  
pp. 39-46
Author(s):  
Winarna Winarna ◽  
Iput Pradiko ◽  
Muhdan Syarovy ◽  
Fandi Hidayat
Keyword(s):  
Soil Ph ◽  
Oil Palm ◽  
Water Retention ◽  
Peat Soil ◽  
Steel Slag ◽  
Field Capacity ◽  
Ash Content ◽  
Oil Palm Plantation ◽  
Randomized Design ◽  
Four Levels

Development of oil palm plantation on peatland was faced with hydrophobicity problem caused by over drained. Hydrophobicity could reduce water retention and nutrient availability in the peat soil. Beside of proper water management application, addition of soil ameliorant which contain iron could increase stability and improve peat soil fertility. The study was conducted to obtain the effect of steel slag on peat soil properties and hydrophobicity. In this study, peat soil was incorporated with steel slag and incubated in 60 days period. The research was employed completely randomized design (CRD) factorial 2 x 2 x 4. First factor is peat maturity consists of two levels: sapric (S) and hemic (H), while the second factor is soil moisture which also consist of two levels: field capacity (W1) and dry (under the critical water content) (W2). The third factor is steel slag dosage which consist of four levels: 0 g pot (TB0), 7.17 g pot (TB1), 14.81 g -1 -1 pot (TB2), and 22.44 g pot (TB3). The result showed that application of steel slag significantly increase of soil pH, ash content, and water retention at pF 4.2. Furthermore, application of steel slag significantly reduce time for water reabsorption (wettability) in sapric. On the other hand, there are negative corellation between water penetration and soil pH, ash content, and water retention at pF 4.2. Overall, application of steel slag could increase wettability and prevent peat soil hydrophobicity.

Interaction of tungsten in dry sliding against steel under high density electric current

2019 ◽  
pp. 101-109 ◽  
Author(s):  
M. I. Aleutdinova ◽  
V. V. Fadin ◽  
Yu. P. Mironov
Keyword(s):  
Electrical Contact ◽  
Analysis Data ◽  
Dry Sliding ◽  
Sliding Surface ◽  
X Ray ◽  
Sliding Surfaces ◽  
Quenched Steel ◽  
Sliding Electrical Contact ◽  
A Current ◽  
Tungsten Steel

The possibility of creating a wear-resistant dry sliding electrical contact tungsten/steel was studied. It was shown that tungsten caused severe wear of the quenched steel counterbody due to unlimited plastic flow of its surface layer at a current density up to 150 A/cm2 . This indicated the impossibility of achieving satisfactory characteristics of such a contact. Low electrical conductivity and wear resistance of the contact tungsten/steel were presented in comparison with the known high copper/steel contact characteristics under the same conditions. X-ray phase analysis data of the steel sliding surfaces made it possible to state that the cause of the unsatisfactory sliding of tungsten was the absence of the necessary concentration of FeO oxide on the sliding surface of the steel. 

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