scholarly journals The Using of Technogenic Waste from Ferroalloy Production

2020 ◽  
Author(s):  
Vladimir Ivanovich Zhuchkov ◽  
Alexandr Vladimirovich Sychev ◽  
Oleg Vadi- movich Zayakin ◽  
Leopold Igorevich Leontiev
Keyword(s):  
Blast Furnace ◽  
Waste Disposal ◽  
Raw Materials ◽  
Ferroalloy Production ◽  
Partial Recovery ◽  
Auxiliary Equipment ◽  
Technogenic Waste ◽  
Production Wastes ◽  
Main Production ◽  
Environmental Measures

When ferroalloys are produced, a large number of coproducts are also formed: slag, riddlings of small fractions of ore raw materials and finished products (ferroalloys), sludge, dust and a number of other materials. Their use and processing allows for reduced consumption of the original minerals, thereby increasing the efficiency of the main production and reducing environmental pollution. As a result, both enterprise costs in the form of environmental payments for emissions and waste disposal, as well as government costs associated with environmental measures are reduced. However, the scale of use of ferroalloy production wastes is relatively small. The replacement of the main and auxiliary equipment with new, environmentally friendly equipment, can promote to significantly reduce or completely eliminate hazardous emissions and the generation of unclaimed production waste. It is necessary to organize the use of blast furnace gas from ore reduction furnaces for preheating and partial recovery of elements of charge materials. Keywords: waste, ferroalloy production, utilization

scholarly journals STRATEGIC MANAGEMENT OF LOGISTIC FLOWS OF PRODUCTION WASTES AND CONSUMPTION ON THE EXAMPLE DATA OF THE COMPANY OOO "SOZVEZDIE"

2017 ◽  
pp. 07-12
Author(s):  
M. G. TREIMAN
Keyword(s):  
Economic Evaluation ◽  
Waste Management ◽  
Strategic Management ◽  
Waste Disposal ◽  
Reverse Logistics ◽  
Management Strategy ◽  
Raw Materials ◽  
Production Wastes ◽  
Production And Consumption ◽  
Additional Income

The article discusses the provisions of the improvement of reverse logistics for example, the company on garbage removal, OOO "Sozvezdie". Proposed measures for the implementation of the railyard into the practice of companies in the waste disposal of production and consumption. Every firm should be developed by the national waste management strategy – routing logistic streams, sorting, extracting secondary raw materials, in addition, performed economic evaluation of the additional income from the introduction of measures for sorting.

scholarly journals Production of Synthetic Wollastonite Using Gypsum Technogenic Raw Materials

2020 ◽  
Author(s):  
Yarusova S.B. ◽  
Gordienko P.S ◽  
Buravlev I.Yu. ◽  
Kozin A.V. ◽  
Zhevtun I.G. ◽  
...  
Keyword(s):  
Composite Materials ◽  
Raw Materials ◽  
Polymeric Composite ◽  
Waste Processing ◽  
Practical Application ◽  
Waste Concrete ◽  
Technogenic Waste ◽  
Production Wastes ◽  
Synthetic Wollastonite ◽  
Technogenic Raw Materials

The paper analyzes the literature in the field of synthetic wollastonite production using gypsum technogenic raw materials. Using the example of the complex processing of boric acid production wastes the possibility of obtaining synthetic wollastonite at different modes of waste processing is shown. Possible areas of the practical application of the obtained wollastonite are analyzed. Keywords: gypsum technogenic raw materials, borogypsum, wollastonite, technogenic waste, concrete fillers, polymeric composite materials.

RHEOLOGICAL PROPERTIES OF CERAMIC MASSES: IMPROVEMENT BY COMPLEX MATERIAL ACTIVATION

2019 ◽  
Vol 16 (3) ◽  
pp. 334-351
Author(s):  
A. S. Mavlyanov ◽  
E. K. Sardarbekova
Keyword(s):  
Rheological Properties ◽  
Raw Materials ◽  
Sensitivity Coefficient ◽  
Raw Material ◽  
Clay Material ◽  
Fibrous Materials ◽  
Chemical Production ◽  
Production Wastes ◽  
Pass Through ◽  
The Masses

Introduction. The objective of the research is to study the effect of the complex activation of the alumina raw material on the rheological properties of the ceramic mass. In addition, the authors investigate solutions for the application of optimal coagulation structures based on loams and ash together with plastic certificates.Materials and methods. The authors used the local forest like reserves of clay loams at the BashKarasu, ash fields of the Bishkek Central Heating Centre (BTEC) and plasticizer (sodium naphthenate obtained from alkaline chemical production wastes) as fibrous materials. Moreover, the authors defined technological properties of raw materials within standard laboratory methodology in accordance with current GOSTs.Results. The researchers tested plastic durability on variously prepared masses for the choice of optimal structures. The paper demonstrated the plastic durability of complexly activated compounds comparing with non-activated and mechanically activated compounds. The sensitivity coefficient increased the amount of clay loams by mechanically and complexly activated, which predetermined the possibility of intensifying the process of drying samples based on complexly activated masses.Discussion and conclusions. However, mechanical activation of clay material reduces the period of relaxation and increases the elasticity coefficient of ceramic masses by 1.8–3.4 times, meanwhile decreases elasticity, viscosity and the conventional power during molding, which generally worsens the molding properties of the masses. Сomplex activation of ash-clay material decreases the period of relaxation and provides an increase in elasticity, plasticity of ceramic masses by 46–47%, reduction in viscosity by 1.5–2 times, conventional power on molding by 37–122% in comparison with MA clay loams. Ceramic masses based on spacecraft alumina raw materials belong to the SMT with improved rheological properties; products based on them pass through the mouthpiece for 5–7 seconds.

Experimental Research on the Qualitative Characteristics of Iron Ores and Ferrous Waste That Can Be Used in Blast Furnace Mixt Injection Technology

2019 ◽  
Vol 70 (11) ◽  
pp. 3835-3842
Author(s):  
Mihai Dumitru Tudor ◽  
Mircea Hritac ◽  
Nicolae Constantin ◽  
Mihai Butu ◽  
Valeriu Rucai ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Experimental Research ◽  
Raw Materials ◽  
Coal Dust ◽  
Production Costs ◽  
Iron Ores ◽  
Fine Grained ◽  
Experimental Laboratory ◽  
Injection Technology ◽  
Direct Use

Direct use of iron ores in blast furnaces, without prior sintering leads to a reduction in production costs and energy consumption [1,2]. Fine-grained iron ores and iron oxides from ferrous wastes can be used together with coal dust and limestone in mixed injection technology through the furnace tuyeres. In this paper are presented the results of experimental laboratory investigations for establishing the physic-chemical characteristics of fine materials (iron ore, limestone, pulverized coal) susceptible to be used for mixed injection in blast furnace. [1,4]. The results of the experimental research have shown that all the raw materials analyzed can be used for mixt injection in blast furnace.

Adjustment of a technology of cast iron smelting in the blast furnace of jsc "ural steel" w ith a volume of 1232 см3 with charge h a v in g 95% share of Mikhailovskii GOK pellets

2021 ◽  
Vol 77 (7) ◽  
pp. 768-775
Author(s):  
I. F. Iskakov ◽  
G. A. Kunitsyn ◽  
D. V. Lazarev ◽  
А. А. Red`kin ◽  
S. A. Trubitsyn ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Iron Ore ◽  
Raw Materials ◽  
Raw Material ◽  
Material Base ◽  
Hot Metal ◽  
Charging System ◽  
Iron Smelting ◽  
Gas Consumption ◽  
A Charge

To use effectively internal raw material base, JSC “Ural Steel” accomplished I category major overhaul of the blast furnace No. 2. The main purpose of the overhaul was to design a rational profile which could ensure an ability to operate with a charge containing 95 % of Mikhailovskii GOK (mining and concentrating plant) pellets having basicity of 0.5 by CaO/SiO2. The blast furnace No. 2 having useful volume of 1232 m3, was constructed by design of Danieli Corus, the Netherlands, and was blown in on December 30, 2020. In the process of guarantee tests, step-by-step increase of Mikhailovskii GOK pellets (Fetotal = 60.5 %, CaO/SiO2 = 0.5) content in the charge iron ore part was being accomplished from 55 to 95.1%. Charging of the blend containing pellets in the amount of 55% of iron ore part, was done by charging system 4OOCC + 1COOCC (Ore - Coke) with filling level 1.5 m. Under conditions of pellets part increase in the blend, the charging system was changed to decrease their content at the periphery, to increase it in the ore ridge zone and make it intermediate between periphery and the ore ridge. At the pellets share in the iron ore raw materials 0.75 the charging system was used as the following: 3OOCC + 1COOC + 1COOCC, while at the content 95.1% the following charging system was used: 2COOC + 2COOC + 1COOCC. It was noted that in the period of guarantee tests the furnace running was smooth. The average silicon content in the hot metal was 0.70% at the standard deviation 0.666. Sulfur content in the hot metal did not exceed 0.024%, the blowing and natural gas consumption figures were 2100 m3/min and 11000 m3/min correspondently, oxygen content in the blowing 26.5%, hot blowing and top smoke pressure figures were 226.5 and 109.8 KPa correspondently. The productivity of the furnace was reached as high as 2358 t/day at the specific coke rate 433 kg/t of hot metal. After guarantee tests completion, the pellets content in the iron ore part was decreased gradually from 95 down to 50%. The decreasing was made by 5% in every 6 hours of operation. Application of the mastered technology of the blast furnace No. 2 with the increased share of pellets will enable to stably supply the blast furnaces No. 1, 3 and 4 by iron ore raw materials in the proportion of 30-35% of pellets and 65-70% of sinter.

scholarly journals Properties and application of carbon composite brick for blast furnace hearth

2015 ◽  
Vol 51 (2) ◽  
pp. 143-151 ◽  
Author(s):  
K.X. Jiao ◽  
J.L. Zhang ◽  
Z.J. Liu ◽  
Y.G. Zhao ◽  
X.M. Hou
Keyword(s):  
Blast Furnace ◽  
Chemical Composition ◽  
Raw Materials ◽  
Protective Layer ◽  
Silicon Powder ◽  
Slag Layer ◽  
Carbon Composite ◽  
Carbon Layer ◽  
Furnace Hearth ◽  
Blast Furnace Hearth

A type of carbon composite brick was produced via the microporous technique using natural flack graphite, ?-Al2O3 and high-quality bauxite chamotte (Al2O3?87 mass%) as raw materials with fine silicon powder as additive. The composition and microstructure of the obtained carbon composite were characterized using chemical analysis, XRD and SEM with EDS. The high temperature properties of thermal conductivity, oxidization and corrosion by molten slag and hot metal of the composite were analyzed. Based on these, the type of carbon composite brick worked in a blast furnace hearth for six years was further sampled at different positions. The protective layer was found and its chemical composition and microscopic morphology were investigated. It is found that the carbon composite brick combines the good properties of both the conventional carbon block and ceramic cup refractory. The protective layer near the hot face consists of two separated sublayers, i.e. the slag layer and the carbon layer. A certain amount of slag phase is contained in the carbon layer, which is caused by the reaction of coke ash with the refractory. No obvious change in the chemical composition of the protective layer along the depth of the sidewall is found. This work provides a useful guidance for the extension of the lifetime of blast furnace hearths.

Application of factory-applied epoxy coatings for corrosion protection of buried trunk pipelines

2021 ◽  
pp. 293-303
Author(s):  
Александр Михайлович Ефремов ◽  
Петр Дмитриевич Волянский ◽  
Павел Олегович Ревин ◽  
Сергей Владимирович Ануфриев
Keyword(s):  
Corrosion Protection ◽  
Oil And Gas ◽  
Raw Materials ◽  
Epoxy Coating ◽  
Economic Feasibility ◽  
Directional Drilling ◽  
Epoxy Coatings ◽  
The Usa ◽  
Construction Experience ◽  
Main Production

При сооружении трубопроводов в России, странах Европы и Африки наиболее распространенным является применение труб с трехслойными полиэтиленовыми покрытиями. В то же время опыт строительства магистральных нефте- и газопроводов в США, Канаде, ряде других стран свидетельствует о возможности использования эпоксидных покрытий в качестве эффективной антикоррозионной защиты труб. В этой связи была начата научно-исследовательская работа по определению целесообразности применения двухслойных эпоксидных покрытий для антикоррозионной защиты магистральных трубопроводов подземной прокладки, эксплуатируемых организациями системы «Транснефть». Цель настоящего исследования - оценка технической и экономической целесообразности использования эпоксидных покрытий как альтернативы полиэтиленовой изоляции трубопроводов. Были проведены лабораторные исследования образцов трех систем эпоксидных покрытий, осуществлен сравнительный анализ технических свойств эпоксидной и полиэтиленовой изоляции. Установлено, что эпоксидные покрытия превосходят полиэтиленовые по ряду свойств, в частности обладают повышенной стойкостью к температурным воздействиям, УФ-излучению, катодному отслаиванию, а также повышенной механической прочностью, что позволяет обеспечить сохранность покрытия при строительстве трубопроводов методом наклонно-направленного бурения и прокладке в скальных грунтах. Основные мощности по производству сырья для эпоксидных порошковых покрытий локализованы в России, в то время как сырье для полиэтиленовых покрытий в основном производится за рубежом. Установлена экономическая целесообразность применения двухслойного эпоксидного покрытия как альтернативы трехслойному полиэтиленовому покрытию для трубопроводов больших диаметров - более 720 мм. Для внедрения труб с двухслойным эпоксидным покрытием на объектах ПАО «Транснефть» проводится его апробация, включающая строительство опытного участка трубопровода. When constructing pipelines in Russia, Europe, and Africa, it is the most common to use pipes with threelayer polyethylene coatings. At the same time, the oil and gas pipeline construction experience in the USA, Canada, and a number of other countries, as well as the construction of the Zapolyarye - Purpe elevated main pipeline by Transneft PJSC, indicates the possibility of using epoxy coatings as an effective pipe corrosion protection solution. In respect thereof, research study to determine the feasibility of using two-layer epoxy coatings for corrosion protection of underground pipelines operated by the Transneft system entities was instituted. The purpose of this study is to assess the technical and economic feasibility of using epoxy coatings as an alternative to polyethylene insulation of pipelines. Laboratory studies of samples of three epoxy coating systems, as well as a comparative analysis of the process properties of epoxy and polyethylene insulation were conducted. It has been established that epoxy coatings are superior to polyethylene coatings in a number of properties, in particular, they are characterized by increased resistance to temperature effects, UV radiation, cathodic disbondment, as well as increased mechanical strength, which makes it possible to ensure safety of the coating during the construction of pipelines by directional drilling and laying in rocky soils. The main production facilities for raw materials for epoxy powder coatings are localized in Russia, while raw materials for polyethylene coatings are mainly produced abroad. The economic feasibility of using a twolayer epoxy coating as an alternative to a three-layer polyethylene coating for pipelines of large diameters (over 720 mm (28 in)) was established. Testing for the introduction of pipes with a two-layer epoxy coating at the Transneft PJSC facilities is being performed, including construction of an experimental pipeline section.

Analysis of Large Bell Angle in Double Bell System on Burden Material Distribution and Layer Deformation in Mini Blast Furnace with Capacity 250 Ton/Day Using Solid Particle Model

2019 ◽  
Vol 964 ◽  
pp. 185-192
Author(s):  
Sungging Pintowantoro ◽  
Mas Irfan P. Hidayat ◽  
Fakhreza Abdul ◽  
Hamzah Syaifullah
Keyword(s):  
Blast Furnace ◽  
Raw Materials ◽  
Peripheral Zone ◽  
Furnace Operation ◽  
Processing Technology ◽  
Particle Model ◽  
Material Distribution ◽  
Large Bell ◽  
Charging System ◽  
Ore Processing

The abundant of nickel ore resources in Indonesia and the regulations of Law of Coals and Minerals No. 4 year 2009 cause the development of nickel ore processing technology. One of the proven nickel ore processing technology is Mini Blast Furnace (MBF). When, the raw materials were fed to the MBF, there is a charging system to ensure good distribution of raw materials in MBF. The double bell charging system has an important role on the distribution of burden material in MBF. By optimizing the distribution and layers of the material burden, it will increase the stability and efficiency of the MBF process. Therefore, this study focused on analyzing the effect of large bell angle on the distribution of burden material in MBF using discrete element method. After analyzed, large bell angle differences produce different burden material distribution. For particle distribution, particles of small density (coal and dolomitee) tend to be concentrated in the center zone and particles of large density (ore) tend to be concentrated in the intermediate and peripheral zone. The larger angle of the large bell will increase particle falling velocity and the kinetic energy of the burden material. The most stable layer in MBF was obtained when using 65o bell angle. The MBF with 65o large bell angle is the best bell angle for MBF with capacity of 250 ton/day due to the greatest possibility of central working furnace operation.

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