scholarly journals The volatilization behaviour of typical fluorine-containing slag in steelmaking

2020 ◽  
Vol 7 (8) ◽  
pp. 200704
Author(s):  
Zhongyu Zhao ◽  
Junxue Zhao ◽  
Zexin Tan ◽  
Boqiao Qu ◽  
Yaru Cui
Keyword(s):  
Continuous Casting ◽  
Eutectic Point ◽  
Slag System ◽  
Refining Slag ◽  
Performance Control ◽  
Second Stage ◽  
Mould Flux ◽  
And Performance ◽  
Continuous Casting Mould ◽  
Two Stages

It was taken as typical steelmaking fluorine-containing slag systems with the remelting electroslag, continuous casting mould flux and refining slag. The volatilization behaviour of each slag system was analysed by thermogravimetric (TG) and mass spectrometry (MS) detection. The results showed that the remelting electroslag volatilized significantly above 1300°C and the volatiles were mainly CaF 2 , MgF 2 with a small amount of SiF 4 and AlF 3 ; the continuous casting mould flux volatilization was divided into two stages, in the first stage (500°C∼800°C), CaF 2 and Na 2 O reacted to form NaF, and in the second stage (greater than 1200°C), the CaF 2 evaporation was highlighted; for CaF 2 -CaO-based refining slag, the volatilization was the most significant at the eutectic point 84% CaF 2 –16% CaO, and the volatility can be reduced by adding 5% SiO 2 . This research will be guiding significance for the composition and performance control of fluorine-containing slag and metallurgical environmental protection in the steelmaking process.

scholarly journals A Mathematical Model for Prediction of Thickness of Mould Flux Film in Continuous Casting Mould.

2002 ◽  
Vol 42 (10) ◽  
pp. 1084-1093 ◽  
Author(s):  
Akira Yamauchi ◽  
Toshihiko Emi ◽  
Seshadri Seetharaman
Keyword(s):  
Mathematical Model ◽  
Continuous Casting ◽  
Mould Flux ◽  
Continuous Casting Mould

scholarly journals Ukrainian banking system efficiency after double reducing of the number of bank institutions

2018 ◽  
Vol 13 (4) ◽  
pp. 51-60 ◽  
Author(s):  
Olena Prymostka ◽  
Liudmyla Prymostka
Keyword(s):  
Banking System ◽  
Financial Indicators ◽  
System Efficiency ◽  
Second Stage ◽  
Effective Period ◽  
Banking Activity ◽  
Before And After ◽  
System Functioning ◽  
And Performance ◽  
Two Stages

The article intends to evaluate the efficiency and performance of Ukrainian banking system based on two stages. The first stage, when the number of banks was on average the same during that period, and the second stage, that began in 2015 and when the number of banks began to fall quickly up to 82 institutions in 2018. The study is based on the model of dynamics norm of the banking system efficiency for two periods.The concept of efficiency was used based on the methods of non-parametric statistic to obtain performance estimates. The implementation of a dynamic model, based on the peculiarities of the banking system functioning, allows to obtain a generalized assessment of the economic efficiency of banking activity before and after critical change in the number of bank institutions. The correlation matrix between financial indicators of the banking system activity was created and the dynamic norm for the two periods was calculated. Given the analytical comparison of indicators, more effective period was identified. The general results of the study indicate that the overall efficiency of the banking system started to grow up since 2015.

Effects of Continuous Casting Mould Vibration Feeding Strip on the Slab Structure

2015 ◽  
Vol 727-728 ◽  
pp. 299-304
Author(s):  
Lin Hui Yu ◽  
Ji Dong Li ◽  
Anthony Shevchenko ◽  
Ming Gang Shen ◽  
Bao Guo Zhang ◽  
...  
Keyword(s):  
Continuous Casting ◽  
Steel Strip ◽  
New Technology ◽  
Low Carbon Steel ◽  
Cast Billet ◽  
Low Carbon ◽  
Steel Mill ◽  
Continuous Casting Mold ◽  
And Performance ◽  
Continuous Casting Mould

Continuous casting mold feeding steel strip is a new technology to improve the organization and the equiaxed crystal ratio of casting slab. It is researched in one Steel Mill taking low carbon steel Q235B, 250 * 1600mm billet as the research object. Effects of the vibration feeding steel strip on the slab structure and performance is studied. Results show that, porosity in the center of cast billet and macro segregation of dispersion decreased through the continuous casting mould vibration feeding steel strip technology, which can improve the quality of macro structure and reduce the chemical heterogeneity shaft direction to the regional and then improve the plasticity in thick rolling plate.

scholarly journals Design, Implementation and Performance Analysis of a Low-cost Optical Tachometer

IIUC Studies ◽  
2012 ◽  
Vol 7 ◽  
pp. 107-116 ◽  
Author(s):  
ASM Bakibillah ◽  
Muhammad Athar Uddin ◽  
Shah Ahsanul Haque
Keyword(s):  
Power Supply ◽  
Low Cost ◽  
Measurement Instrument ◽  
Infrared Light ◽  
Second Stage ◽  
Digital Counter ◽  
Speed Measurement ◽  
Power Supply Circuit ◽  
And Performance ◽  
Two Stages

Electrical and mechanical machineries are used in industrial and domestic applications. Measurement of speed of revolving machineries is necessary for their proper functioning and controlling. Tachometer is an instrument which is used to measure the speed of revolving shaft, gear and pulley. This paper describes the basic construction of a low cost optical tachometer and analyzes its performance. The basic tachometer circuit consists of two stages. In the first stage monostable wired around IC NE555 is used, and in the second stage a digital counter based 4-digit counter IC 74C926 is used for the construction of the tachometer. A 5V regulated power supply circuit and an infrared light source circuit are also used. The instrument can measure speed upto 9999 RPM. This speed measurement instrument performs well in terms of accuracy, and can be very useful due to its simplicity and low cost. DOI: http://dx.doi.org/10.3329/iiucs.v7i0.12263 IIUC Studies Vol.7 2011: 107-116

Altered Fine Structure of B Lymphocytes Correlated with Defective Terminal Differentiation

1973 ◽  
Vol 31 ◽  
pp. 386-387
Author(s):  
Dale E. Bockman ◽  
L. Y. Frank Wu ◽  
Alexander R. Lawton ◽  
Max D. Cooper
Keyword(s):  
Immune Deficiency ◽  
B Lymphocytes ◽  
Plasma Cells ◽  
Present Report ◽  
Specific Antigen ◽  
Terminal Differentiation ◽  
Second Stage ◽  
Two Stages ◽  
Deficiency Diseases ◽  
Cell Line Generation

B-lymphocytes normally synthesize small amounts of immunoglobulin, some of which is incorporated into the cell membrane where it serves as receptor of antigen. These cells, on contact with specific antigen, proliferate and differentiate to plasma cells which synthesize and secrete large quantities of immunoglobulin. The two stages of differentiation of this cell line (generation of B-lymphocytes and antigen-driven maturation to plasma cells) are clearly separable during ontogeny and in some immune deficiency diseases. The present report describes morphologic aberrations of B-lymphocytes in two diseases in which second stage differentiation is defective.

Distributed Entropy Energy-Efficient Clustering algorithm for cluster head selection (DEEEC)

2020 ◽  
Vol 39 (6) ◽  
pp. 8139-8147
Author(s):  
Ranganathan Arun ◽  
Rangaswamy Balamurugan
Keyword(s):  
Energy Efficient ◽  
Clustering Algorithm ◽  
Cluster Head ◽  
Residual Energy ◽  
Energy Utilization ◽  
Sensor Nodes ◽  
Second Stage ◽  
Energy Efficient Clustering ◽  
Two Stages ◽  
Ch Selection

In Wireless Sensor Networks (WSN) the energy of Sensor nodes is not certainly sufficient. In order to optimize the endurance of WSN, it is essential to minimize the utilization of energy. Head of group or Cluster Head (CH) is an eminent method to develop the endurance of WSN that aggregates the WSN with higher energy. CH for intra-cluster and inter-cluster communication becomes dependent. For complete, in WSN, the Energy level of CH extends its life of cluster. While evolving cluster algorithms, the complicated job is to identify the energy utilization amount of heterogeneous WSNs. Based on Chaotic Firefly Algorithm CH (CFACH) selection, the formulated work is named “Novel Distributed Entropy Energy-Efficient Clustering Algorithm”, in short, DEEEC for HWSNs. The formulated DEEEC Algorithm, which is a CH, has two main stages. In the first stage, the identification of temporary CHs along with its entropy value is found using the correlative measure of residual and original energy. Along with this, in the clustering algorithm, the rotating epoch and its entropy value must be predicted automatically by its sensor nodes. In the second stage, if any member in the cluster having larger residual energy, shall modify the temporary CHs in the direction of the deciding set. The target of the nodes with large energy has the probability to be CHs which is determined by the above two stages meant for CH selection. The MATLAB is required to simulate the DEEEC Algorithm. The simulated results of the formulated DEEEC Algorithm produce good results with respect to the energy and increased lifetime when it is correlated with the current traditional clustering protocols being used in the Heterogeneous WSNs.

Analisis Kebutuhan Petunjuk Praktikum Berbasis Keterampilan Proses Sains untuk Mencapai Kemampuan Merancang Eksperimen

2019 ◽  
Vol 2 (2) ◽  
Author(s):  
Fitriah Khoirunnisa ◽  
Friska Septiani Silitonga ◽  
Veri Firmansyah
Keyword(s):  
Core Competence ◽  
Process Skills ◽  
Learning Materials ◽  
Science Process Skills ◽  
Second Stage ◽  
The Core ◽  
The Core Competence ◽  
Two Stages ◽  
Practical Instruction ◽  
Design Experiments

Penelitian ini bertujuan menganalisis kebutuhan petunjuk praktikum berbasis Keterampilan Proses Sains (KPS) untuk mencapai kemampuan merancang eksperimen pada materi kalor reaksi kalorimetri. Penelitian dilakukan terhadap peserta didik kelas XI SMA Negeri 2 Kota Tanjungpinang. Variabel penelitian mencakup analisis kebutuhan bahan ajar dan analisis kesesuaian Kompetensi Inti (KI) dan Kompetensi Dasar (KD). Jenis penelitian yang dilakukan adalah penelitian deskriptif kualitatif. Tahapan pertama dalam penelitian ini adalah menganalisis kebutuhan bahan ajar dengan cara membandingkan dua petunjuk praktikum yang selama ini telah digunakan di sekolah tersebut, ditinjau dari aspek struktur format penulisan, aspek kreativitas, dan aspek keterampilan proses sains yang terdapat dalam petunjuk praktikum. Sehingga didapatkan kesimpulan bahwa petunjuk praktikum yang selama ini digunakan tidak memberikan kesempatan kepada peserta didiknya untuk merancang eksperimen yang telah ditentukan. Tahapan kedua yaitu menganalisis kesesuaian kompetensi inti dan kompetensi dasar, yang bertujuan untuk menentukan indikator pencapaian kompetensi (IPK) yang akan menjadi acuan dalam mengembangkan petunjuk praktikum berbasis keterampilan proses sains. Dari kedua tahapan yang telah dilakukan maka dapat disimpulkan bahwa peserta didik memerlukan petunjuk praktikum yang mampu mengonstruksi pikiran dan mengaktifkan kinerja mereka, sehingga pendekatan Keterampilan Proses Sains menjadi pilihan dalam mengembangkan petunjuk praktikum yang sesuai dengan karakteristik kurikulum 2013.   This research aims to analyze the needs of Science Process Skills based Practical Instruction to achieve the ability to design experiments on the calor of reaction. This research was done to the students of class XI SMA Negeri 2 Tanjungpinang City. Research Variable includes the analysis of the needs of the learning materials and analysis of the suitability of the Core Competence (KI) and Basic Competence (KD). The type of research conducted is descriptive qualitative research. The first stages in this research is to analyze the needs of learning materials by comparing two practical instructions that had been implementing in the school, from the aspects of the structure of writing format, creativity, and science process skills embedded in practical instructions. The conclusion of this research that current practical instructions does not give an opportunity to the participants to design determined experiments. The second stage, namely analyzing the suitability of core competence and basic competence, which aims to determine the indicators of achievement of the competencies (GPA) which will be a reference in developing process skills-based teaching instructions science. Of the two stages that has been done then it can be concluded that learners need practical instructions to construct  thinking and and their performance, so the Science Process Skills approach is an option in developing practical instruction suitable for the characteristics of the curriculum of 2013.

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