COMPUTATIONAL STUDY OF A TRAILBLAZER MULTI REACTOR TUNDISH (MRT) FOR IMPROVING YIELD AND QUALITY OF STEEL DURING CONTINUOUS CASTING

Free-cutting steel gains specific working properties thanks to the high content of sulfur and phosphorus. These elements, especially sulfur, have a rather high tendency to segregation. Therefore, segregation defects in free-cutting steel continuously cast billets can be significantly developed. The aim of the work was to study the influence of the chemical composition of freecutting steel and casting technological parameters on the quality of the macrostructure of continuously cast billets. A metallographic assessment of the internal structure of cast metal made of free-cutting steel and data processing by application of correlation and regression analysis were the research methods. The array of production data of 43 heats of free-cutting steel of grade A12 was studied. Steel casting on a five-strand radial type continuous casting machine was carried out by various methods of metal pouring from tundish into the molds. Metal of 19 heats was poured with an open stream, and 24 heats – by a closed stream through submerged nozzles with a vertical hole. High-quality billets had a cross-sectional size of 150×150 mm. The macrostructure of high-quality square billets made of free-cutting steel of A12 grade is characterized by the presence of central porosity, axial segregation and peripheral point contamination, the degree of development of which was in the range from 1.5 to 2.0 points, segregation cracks and strips – about 1.0 points. In the course of casting with an open stream, almost all of these defects are more developed comparing with the casting by a closed stream. As a result of correlation and regression analysis, linear dependences of the development degree of segregation cracks and strips both axial and angular on the sulfur content in steel and on the ratio of manganese content to sulfur content were established. The degree of these defects development increases with growing of sulfur content in steel of A12 grade. These defects had especially strong development when sulfur content in steel was of more than 0.10%. To improve the quality of cast metal, it is necessary to have the ratio of the manganese content to the sulfur content in the metal more than eight.

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Effect of different planting density on leaf yield and quality of moringa (Moringa oliefera Lam.)

THE ASIAN JOURNAL OF HORTICULTURE ◽

10.15740/has/tajh/12.2/241-243 ◽

2017 ◽

Vol 12 (2) ◽

pp. 241-243

Author(s):

K. RAMKUMAR ◽

S. ANUJA

Keyword(s):

Planting Density ◽

Yield And Quality ◽

Leaf Yield

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Орошение томата F1 Донской в открытом грунте Московской области

Kartofel` i ovoshi ◽

10.25630/pav.2019.29.90.002 ◽

2019 ◽

Author(s):

D.I. Engalychev ◽

N.A. Engalycheva ◽

A.M. Menshikh

Keyword(s):

Experimental Data ◽

Agricultural Technology ◽

Tomato Fruits ◽

River Floodplain ◽

Yield And Quality ◽

Open Ground ◽

Alluvial Meadow ◽

Standard Production ◽

Moscow River

Представлены экспериментальные данные о влиянии капельного орошения на урожайность и качество плодов томата при выращивании культуры в открытом грунте Московской области. На плодородных аллювиальных луговых почвах Москворецкой поймы при соблюдении агротехники без орошения в среднем за три года исследований в полевых условиях получена урожайность томата F1 Донской 31,9 т/га, с орошением 48,5 т/га, в т.ч. стандартной продукции 42,6 т/га.The article presents experimental data on the effect of drip irrigation on the yield and quality of tomato fruits when growing crops in open ground of the Moscow Region. On fertile alluvial meadow soils of the Moscow river floodplain, with the observance of agricultural technology without irrigation, the field yield of tomato hybrid F1 Donskoi on average for three years of research was 31.9 t/ha, with irrigation 48.5 t/ha, incl. standard production 42.6 t/ha.

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Агрономическая эффективность промышленной (голландской) технологии возделывания картофеля

Kartofel` i ovoshi ◽

10.25630/pav.2018.1.17458 ◽

2018 ◽

Author(s):

C. Coy ◽

A.V. Shuravilin ◽

O.A. Zakharova

Keyword(s):

Heavy Metals ◽

Regression Analysis ◽

Positive Response ◽

Growth Yield ◽

Correlation And Regression Analysis ◽

Yield And Quality ◽

Quality Of Products ◽

High Degree ◽

The Impact

Приведены результаты исследований по изучению влияния промышленной технологии возделывания картофеля на развитие, урожайность и качество продукции. Выявлена положительная реакция растений на подкормку K2SO4 в период посадки. Корреляционно-регрессионный анализ урожайности и качества клубней выявил высокую степень достоверности результатов опыта. Содержание нитратов и тяжелых металлов в клубнях было ниже допустимых величин.The results of studies on the impact of industrial technology of potato cultivation on growth, yield and quality of products. There was a positive response of plants to fertilizer K2SO4 in the period of planting. Correlation and regression analysis of yield and quality of tubers revealed a high degree of reliability of the results of experience. The contents of nitrates and heavy metals in tubers was below the permissible values.

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Pengaruh Jenis Co-Solvent terhadap Rendemen dan Mutu Biodiesel secara Transesterifikasi In Situ Menggunakan Radiasi Gelombang Mikro

Jurnal Riset Teknologi Industri ◽

10.26578/jrti.v10i2.2563 ◽

2016 ◽

Vol 10 (2) ◽

pp. 119-126

Author(s):

Mahlinda Mahlinda ◽

Fitriana Djafar

Keyword(s):

Catalyst Concentration ◽

Maximum Yield ◽

Acid Value ◽

Experimental Result ◽

In Situ Transesterification ◽

Yield And Quality ◽

Solvent Type ◽

Biodiesel Quality

The main purpose of this research was to observer effect co-solvent type (n-Hexane, chloroform and without co-solvent) toward yield and quality of biodiesel via in situ transesterification process using microwave irradiation. The process was studied at microwave power 450 watt, reaction time 4 minutes, methanol to seed ratio 25:1 and catalyst concentration 5%. The physicochemical parameters of the biodiesel produced such as viscosity, density and acid value were analysed and compared with the SNI 7182-2012 standard. The experimental result showed the maximum yield biodiesel 78,32% obtained by using co-solvent chloroform.Test result of physicochemical properties (viscosity, density and acid value) of biodiesel products using co solvent n-Hexane, chloroform and without co solvent showed that these products conform to the SNI 7182-2012 standars. The type of co-solvent only affectedon biodiesel yield dan not affected on biodiesel quality (viscosity, density and acid value). ABSTRAKTujuan penelitian ini adalah untuk mempelajari pengaruh jenis co-solvent (n-Hexane, chloroform dan tanpa co-solvent) terhadap rendemen dan mutu biodiesel secara trasesterifikasi in situ menggunakan radiasi gelombang mikro. Proses dilakukan pada daya gelombang mikro 450 watt, waktu reaksi 4 menit, perbandingan berat metanol terhadap bahan baku 25:1 dan jumlah katalis 5%. Parameter fisiko kimia dari produk biodiesel seperti viskositas, densitas dan angka asam di analisa dan dibandingkan dengan standar SNI 7182-2012 tentang biodiesel. Hasil penelitian menunjukkan rendemen maksimum biodiesel sebesar 78,32% diperoleh dengan menggunakan co-solvent chloroform. Hasil pengujian karakteristik fisiko kimia (viskositas, densitas dan angka asam) dari produk biodiesel menggunakan co-solvent n-Hexane, chloroform dan tanpa co-solvent menunjukkan bahwa semua parameter ini masih memenuhi standar SNI 1782-2012 tentang biodiesel. Jenis co-solvent hanya berpengaruh pada rendemen biodiesel dan tidak berpengaruh terhadap mutu biodiesel (viskositas, densitas dan bilangan asam).Kata kunci: co-solvent, in situ transesterifikasi, microwave, rendemen, mutu

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Yield and quality of legumes-festulolium feeds when cultivated on gray forest soils of Kaluga region

сборник статей всероссийской научной конференции с международным участием "Растениеводство и луговодство" ◽

10.26897/978-5-9675-1762-4-2020-134 ◽

2020 ◽

Author(s):

V.N. Lukhashov ◽

◽

A.N. Isakov

Keyword(s):

Forest Soils ◽

Dry Matter ◽

Dry Matter Yield ◽

Gray Forest Soils ◽

Yield And Quality ◽

Kaluga Region

The article shows dry matter yield and quality of legumes-festulolium feeds when cultivated on gray forest soils of Kaluga region.

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Influence of mineral elements on the yield and quality of grain of the prospective line in winter tritikale

сборник статей всероссийской научной конференции с международным участием "Растениеводство и луговодство" ◽

10.26897/978-5-9675-1762-4-2020-65 ◽

2020 ◽

Author(s):

I.N. Voronchikhina ◽

◽

A.G. Marenkova ◽

V. S. Rubets ◽

V. V. Pylnev

Keyword(s):

Cost Effective ◽

Mineral Elements ◽

Early Spring ◽

High Potential ◽

Winter Triticale ◽

Yield And Quality ◽

Fertilizer System

The results of elements development of varietal agrotechnics of a new high-potential line 238h of winter triticale presented. It was identified that under the conditions of 2020 the most cost effective fertilizer system is an early spring application of NPK (S) (15-15-15 (10)) at a dose of 200kg/ha. The profitability level of this fertilizer was 88,9%.

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