scholarly journals Smelting options for carbon ferrochrome based on ore raw materials, middlings and their technological evaluation

2022 ◽  
Vol 320 (1) ◽  
pp. 51-59
Author(s):  
S. Baisanov ◽  
◽  
Ye.Zh. Shabanov ◽  
K.V. Grigorovich ◽  
R.T. Toleukadyr ◽  
...  
Keyword(s):  
Large Scale ◽  
Raw Materials ◽  
Main Idea ◽  
Economic Indicators ◽  
Processing Plant ◽  
Technological Parameters ◽  
Gas Cleaning ◽  
Carbon Ferrochrome ◽  
Technological Evaluation ◽  
Technical And Economic Indicators

The article presents the results of large-scale laboratory tests carried out in the conditions of the Chemical and Metallurgical Institute named after V.I. Zh. Abishev on the use of briquetted mono-charge in the smelting of carbon ferrochrome on a 250 kVA furnace. The purpose of these studies was to determine the technological parameters of the use of briquetted mono-charge containing in its composition chrome ore, wastes from the production of high-carbon ferrochrome, middlings and various carbonaceous reducing agents. The main idea of using these briquettes was to multiply the contact surface of the reductant and ore, which should speed up the technological process. The principal possibility of smelting a standard alloy using briquetted mono-charge is shown. The alloy for individual charge options meets the requirements of the standards. In comparison with the technology without the use of briquettes, the mono-charge technology has shown advantages in all main parameters. The technology with the use of briquettes from the dust of the AktZF gas cleaning system is distinguished by a low yield of non-standard metal and slag, the bulk of the material goes into the gas collection system. Technologies from briquettes from fines pellet production area of Donskoy ore mining and processing plant and flash have very low specific technical and economic indicators and cannot be recommended for industrial use. Improvement of briquetting modes and technology of their smelting is required. The technical and economic indicators were higher than the current one, showed briquettes from ore and coke of the People's Republic of China, briquettes of ore from borlin and shubarkol coals of Kazakhstan.

RECOMMENDATIONS FOR THE CHOICE OF MILKING INSTALLATIONS IN LOOSE HOUSING SYSTEMS OF COWS

2020 ◽  
Author(s):  
В.В. ГОРДЕЕВ ◽  
В.Е. ХАЗАНОВ
Keyword(s):  
Dairy Cows ◽  
High Performance ◽  
Large Scale ◽  
Dairy Farms ◽  
Economic Indicators ◽  
Technical Level ◽  
Housing Systems ◽  
Working Shift ◽  
Technical And Economic Indicators

При выборе типа доильной установки и ее размера необходимо учитывать максимальное планируемое поголовье дойных коров и размер технологической группы, кратность и время одного доения, продолжительность рабочей смены дояров. Анализ технико-экономических показателей наиболее распространенных на сегодняшний день типов доильных установок одинакового технического уровня свидетельствует, что наилучшие удельные показатели имеет установка типа «Карусель» (1), а установка типа «Елочка» (2) требует более высоких затрат труда и средств. Установка «Параллель» (3) занимает промежуточное положение. Из анализа пропускной способности и количества необходимых операторов: установка 2 рекомендована для ферм с поголовьем дойного стада до 600 голов, 3 — не более 1200 дойных коров, 1 — более 1200 дойных коров. «Карусель» — наиболее рациональный, высокопроизводительный, легко автоматизируемый и, следовательно, перспективный способ доения в залах, особенно для крупных молочных ферм. The choice of the proper type and size of milking installations needs to take into account the maximum planned number of dairy cows, the size of a technological group, the number of milkings per day, and the duration of one milking and the operator's working shift. The analysis of technical and economic indicators of currently most common types of milking machines of the same technical level revealed that the Carousel installation had the best specific indicators while the Herringbone installation featured higher labour inputs and cash costs. The Parallel installation was found somewhere in between. In terms of the throughput and the required number of operators Herringbone is recommended for farms with up to 600 dairy cows, Parallel — below 1200 dairy cows, Carousel — above 1200 dairy cows. Carousel was found the most practical, high-performance, easily automated and, therefore, promising milking system for milking parlours, especially on the large-scale dairy farms.

Research of Titaniferous Ores Melting and Properties of Cast Iron and Slag

2019 ◽  
Vol 391 ◽  
pp. 221-225
Author(s):  
Andrey N. Dmitriev ◽  
R.V. Petukhov ◽  
G.Yu. Vitkina ◽  
E.A. Vyaznikova
Keyword(s):  
Blast Furnace ◽  
Cast Iron ◽  
Chemical Composition ◽  
Iron Ore ◽  
Raw Materials ◽  
Scientific Research ◽  
Economic Indicators ◽  
Furnace Melting ◽  
Technical And Economic Indicators

Questions of melting of iron ore and raw materials with receipt of cast iron and slag are considered in vitro. The chemical composition of cast iron of slag is studied in vitro. The viscosity of slag is researched. Object of research - titaniferous ores with various contents of titan dioxide. The technical and economic indicators of a blast furnace melting an agglomerate and pellets (a consumption of coke and productivity, a chemical composition of cast iron and slag) received from a concentrate of the Kachkanarsky deposit are calculated. The technique of scientific research is used [1].

scholarly journals The assessment of technical and economic indicators of gas cleaning systems working on various types of coal

2020 ◽  
Vol 1441 ◽  
pp. 012017
Author(s):  
P A Batrakov ◽  
E V Yakovleva ◽  
A N Mrakin ◽  
A A Selivanov ◽  
G R Mingaleeva ◽  
...  
Keyword(s):  
Economic Indicators ◽  
Gas Cleaning ◽  
Technical And Economic Indicators

scholarly journals ANALYSIS OF ECONOMIC INDICATORS FOR OIL FLAX PROCESSING

2018 ◽  
Vol 12 (4) ◽  
pp. 35-40
Author(s):  
E. V. Novikov ◽  
N. V. Basova ◽  
A. V. Bezbabchenko
Keyword(s):  
Raw Materials ◽  
Low Cost ◽  
Balance Sheet ◽  
Production Capacity ◽  
Fibre Production ◽  
Economic Indicators ◽  
Main Research ◽  
Processing Site ◽  
Effective Development ◽  
Technical And Economic Indicators

Oil flax grows in many countries of the world. Fibre production on its basis can significantly increase the profitability of flax-growing farms. At the present stage, taking into account the real possibilities of the national economy, for its effective development  it is necessary to introduce advanced technologies. Cur-rently, processing enterprises may choose among different technological equipment lines to process oil flax into fibre and thus get additional profit. (Research purpose) The determination of a technologically and economical-ly effective line for oil flax processing. (Materials and methods) The main materials for calculation were represent-ed by the indicators of production capacity, the average annual value of fixed as-sets, the amount of money spent on salaries and wages, etc. The main research method is the balance method that allows making a plan in the form of a balance sheet that takes into account the sources of inputs and the requirements for these inputs. (Results and discussions) The authors have considered low-cost lines for oil flax processing into short fibre on the basis of disintegrators of various brands (from domestic and foreign producers), offered characteristics of the fibre obtained in the lines, and analyzed technical and economic indicators of various technologi-cal lines under different conditions, and the payback period of capital expenditures for different oil flax acreages. (Conclusions) The authors have determined that the most effective is the pro-cessing of oil flax from an area of at least 1000 hectares, with a throughput capaci-ty of raw materials of at least 1000 kg/h and a distance of the transportation of straw rolls to a processing site of 50 km. They have also obtained technological and economic data that can be used in the organization of oil flax processing into marketable fibre.

scholarly journals Model of baddeleyite recovery from dump products of an apatite-baddeleyite processing plant using a CVD6 concentrator

2021 ◽  
Vol 248 ◽  
pp. 281-289
Author(s):  
Vladislav Pelikh ◽  
Valery Salov ◽  
Alexander Burdonov ◽  
Nikita Lukyanov
Keyword(s):  
Regression Analysis ◽  
Main Idea ◽  
Continuous Variable ◽  
Coarse Grained ◽  
Group Method ◽  
Processing Plant ◽  
Technological Parameters ◽  
Fine Grained ◽  
Processing Plants ◽  
Valve Opening

The paper is devoted to developing a model of baddeleyite recovery from dump products of an apatite-baddeleyite processing plant using centrifugal concentrators. The relevance of the work arises from the acquisition of new knowledge on the optimization of technological parameters of centrifugal concentrators using Knelson CVD (continuous variable discharge) technology – in particular, setting the frequency of valve opening and the duration of valves remaining open. The purpose of the research was to assess the applicability of CVD technology in the treatment of various dump products of the processing plant and to build a model of dependencies between the concentrate and tailings yields and the adjustable parameters, which will allow to perform preliminary calculations of the efficiency of implementing this technology at processing plants. The research objects are middling and main separation tailings of the coarse-grained stream and combined product of main and recleaner separation tailings of the fine-grained stream. The study uses general methods of mathematical statistics: methods of regression analysis, aimed at building statistically significant models, describing dependence of a particular variable on a set of regressors; group method of data handling, the main idea of which is to build a set of models of a given class and choose the optimal one among them. Authors proposed an algorithm for processing experiment results based on classical regression analysis and formulated an original criterion for model selection. Models of dependencies between the concentrate and tailings yields and the adjustable parameters were built, which allowed to establish a relationship between the concentrate yield and the valve opening time, as well as a relationship between the tailings yield and the G-force of the installation.

scholarly journals Technology for the production of high-carbon ferrochromium using mono-briquettes

2018 ◽  
Vol 61 (9) ◽  
pp. 702-707
Author(s):  
E. Zh. Shabanov ◽  
D. D. Izbembetov ◽  
S. O. Baisanov ◽  
M. F. Shadiev
Keyword(s):  
Large Scale ◽  
Process Intensification ◽  
Furnace Operation ◽  
Smelting Process ◽  
Furnace Productivity ◽  
Current Load ◽  
Laboratory Studies ◽  
High Carbon ◽  
Technological Parameters ◽  
Technical And Economic Indicators

The article presents results of large-scale laboratory studies on the basis of Chemical-Metallurgical Institute named after Zh. Abishev on establishing the possibility of using a mono-charge for smelting standard carbon ferrochromium. Enlarged-laboratory studies were carried out in an ore-thermal furnace with transformer capacity of 200 kVA. Duration of the pilot campaign was 4 days. Three variants of briquettes containing various reducing agents were tested, including: traditional charge (coke PRC + special coke + Borolinsky coal); briquettes with coal from Shubarkol; briquettes with Borlinsky coal; briquettes with coke of China. As a comparative variant, traditional technology with charge materials without briquetting was used. In total, when conducted large-scale laboratory studies it was 41 smeltings. The tests began with a comparative version, which was chosen as technology closest to the technology at Aktobe ferroalloy plant. On the traditional charge, top worked without the uniformly gassing over entire surface of the top. Recovery rate of chromium in the alloy was 79.3  %. Change to briquettes with Shubarkol coal in general has led to the process intensification with more stable current load. The furnace productivity increased to 165.9 kg Cr/day due to increase in the contact surface of reacting phases in briquettes. When using briquettes with Borlinsky coal, satisfactory technological parameters of the smelting process for high-carbon ferrochrome were also obtained, extraction rate of chromium into the metal was 84.91  %. When using briquettes from 0  –  10  mm ore fraction ore and CPR coke in the charge, furnace operation and state of the top were not different from previous periods. The charge also went off evenly, without collapses, the briquettes on the top were not destroyed and current load was highly stable. The work also presents comparative technical and economic indicators for all technologies using mono-charge briquettes.

scholarly journals The Methodical Aspect of the Choice of Innovative Technologies for the Production of Alternative Types of Motor Fuel

2021 ◽  
Vol 10 (525) ◽  
pp. 176-187
Author(s):  
V. V. Shpilevskiy ◽  
◽  
D. M. Kostenko ◽  
A. V. Shpilevskiy ◽  
◽  
...  
Keyword(s):  
Rational Choice ◽  
Raw Materials ◽  
Methodological Approach ◽  
Motor Fuel ◽  
Economic Indicators ◽  
Low Grade ◽  
Innovative Technologies ◽  
Methodical Approach ◽  
Synthetic Motor ◽  
Technical And Economic Indicators

The article is aimed at developing a methodological approach to a consistent and rational choice of promising for the development in Ukraine types of alternative motor fuel and innovative technologies for its production, substantiation of the system of technical and economic indicators of the complex for the production of synthetic motor fuel from the low-grade raw materials. One of the key problems of Ukraine’s energy provision today is its high dependence on the import of finished motor fuel, which can be reduced by the development in the country of alternative types of motor fuel based on the latest technologies. The article, based on the provisions of economic theory, discloses the essence of the developed methodological approach to the consistent choice of promising types of alternative motor fuel for their development in Ukraine and innovative technologies of its production. The developed methodological approach for rational choice of promising for the production in Ukraine and use of motor fuel types includes an evaluation of the following: compliance of consumer properties of certain types of motor fuel with the requirements of the existing motor fleet (target); efficiency of motor fuel production technologies (capabilities); sufficiency of resource provision for the production of motor fuel (restrictions). The methodical approach is brought to the level of the methodology, the use of which allows to identify promising types of alternative motor fuel for use in the country and innovative technologies of their production. Along with the developed methodical approach, the expediency of development in Ukraine of the synthetic motor fuel industry is proved on the basis of using the method of indirect coal liquefaction (according to the Fisher–Tropsch method). The result of the work is a system of technical and economic indicators of the complex for the production of synthetic motor fuel from the low-grade raw materials.

scholarly journals EVALUATION OF TECHNICAL AND ECONOMIC INDICATORS OF GAS CLEANING SYSTEMS WHEN WORKING ON VARIOUS COAL BRANDS

2019 ◽  
Vol 7 (3) ◽  
pp. 003-009
Author(s):  
P. A. Batrakov ◽  
◽  
E. V. Yakovleva ◽  
A. N. Mrakin ◽  
A. A. Selivanov ◽  
...  
Keyword(s):  
Economic Indicators ◽  
Gas Cleaning ◽  
Technical And Economic Indicators

scholarly journals Influence of the mechanical characteristics of harp screen material on screening process

2018 ◽  
Vol 61 (9) ◽  
pp. 678-682 ◽  
Author(s):  
A. D. Bardovskii ◽  
A. A. Gerasimova ◽  
A. M. Keropyan ◽  
P. Ya. Bibikow
Keyword(s):  
Mechanical Characteristics ◽  
Raw Materials ◽  
Frequency Range ◽  
Lateral Separation ◽  
Technological Parameters ◽  
Steel Cable ◽  
Screening Process ◽  
Clay Particles ◽  
Steel Cables ◽  
Technical And Economic Indicators

The paper presents the results of studies on the influence of mechanical characteristics of harp screen material on the technological  parameters of screening. A mathematical model of the vibrational  process of harp screens is presented depending on the length of their  free areas, magnitude of technological load and characteristics of the screened material. Dependences of the relative vibrations amplitudes  of rubber and cable strips on the length of their free areas are determined for different values of process load. As a result of the researches, it was established that the amplitude of the relative vibration of  rubber strip under load decreases with increasing length of their free  areas and for steel cable strips it increases, reaching a maximum at  certain values of process load. It was also found that presence of the  load dramatically reduces the amplitude of relative vibration of rubber  strips, especially, in the area of dimensionless frequencies of the order of (0.6  –  1.4)g, while the vibrations amplitude of cable strips vary  slightly in this frequency range. The article presents information on  rubber-cable harp screening surfaces of mesh type: strips in the form  of steel cables, rubberized with rubber cover having lateral separation  projections. The use of rubber-cable strips as working elements of the  screening surface allows to increase the “open area” of the screen due  to the increase of distance between supports while maintaining high  and stable amplitude of strips vibrations. Optimization of mechanical characteristics of the working elements material of harp screens and  conditions of their fixation allows to intensify separation of screened  material into fractions by eliminating sticking of the screened surface  with clay particles and clogging of the material with “difficult” grains, and to improve significantly technical and economic indicators of the  screening process. Such screening surface passed successful industrial tests at a number of quarries producing construction aggregates for the separation of crushed stone and gravel. Economic efficiency of the rubber-cable harp screens is presented in comparison with the wire screens in technological schemes of processing of mineral raw materials.

scholarly journals TO THE QUESTION OF REFINING SOUR CRUDE OIL IN THE ASTRAKHAN GAS CONDENSATE FIELD

2017 ◽  
pp. 32-36
Author(s):  
Rustam Imanbaevich Nigmetov ◽  
Alexandra Faritovna Nurakhmedova ◽  
Nikolay Vladimirovich Popadin
Keyword(s):  
High Pressure ◽  
Raw Materials ◽  
Economic Assessment ◽  
Gas Condensate ◽  
Fuel Oil ◽  
Oil Refining ◽  
Processing Plant ◽  
Technological Parameters ◽  
Fuel Component ◽  
Marine Fuel

The process of catalytic hydroprocessing of residual gas-condensate raw materials is one of the ways to improve the quality and expand the product assortment of the enterprise. Hydrocatalytic technology of refining high-sulphur fuel oil includes the process of heat treatment, when hydrogen is acting as a reagent under high pressure in the presence of catalysts, which reduces the concentration of impurities (metals, sulphur and nitrogen compounds) in the product. The article offers and substantiates operation principles of catalytic hydrogenation of fuel oil in the Astrakhan gas processing plant, and main technological parameters of the process. There has been carried out the preliminary economic assessment the qualified processing 500 t/year of fuel oil. To develop the technology for qualified fuel oil processing there has been created an experimental setup, which is operating under high pressure. The scope of major parameters of experimental research has been defined. Astrakhan fuel oil refining using hydrogenation catalytic process allows to obtain the high quality oil product with sulphur content less than 1% of mass. Using the hydrogenate is feasible as a marine fuel component, because it helps to decrease environmental burden from combustion product emissions.

Sign in / Sign up

Export Citation Format

Share Document