scholarly journals METHOD OF DISCRETENESS SUBSTANTIATION OF QUALITATIVE CHARACTERISTICS TESTING DURING IRON ORE RAW MATERIALS EXTRACTION

2021 ◽  
Vol 2 (1) ◽  
pp. 3-10
Author(s):  
Volodymyr Azarian ◽  
Keyword(s):  
Iron Ore ◽  
Raw Materials ◽  
Quality Characteristics ◽  
Test Period ◽  
Valuable Component ◽  
Flow Formation ◽  
Technical Control ◽  
Component Content ◽  
Definition Of ◽  
Qualitative Characteristics

The article aims to substantiate the periodicity of the definition of the maintenance of a valuable component in faces. Information about the content of the valuable component is necessary to comply with the requirements of the enrichment complex while ensuring the process of the total cargo flow formation. Traditionally, in iron ore quarries, technical control services measure the content of the valuable component every shift, but the testing period requires determination. We aimed to justify the period of testing the quality characteristics of iron ore. To achieve the aim, we explored the quarry № 3 of the PJSC "ArcelorMittal Kryvyi Rih" Mining Department based on the provisions of the mining theory and using mathematical modelling and mathematical statistics methods. We developed a method of substantiating the period of testing the qualitative characteristics of the faces, which we checked based on data from the existing enterprise. Using our method, we proved the possibility of increasing the test period without losing the necessary information about the iron content and without reducing the quality characteristics of the formed final ore flow. Increasing the test period will help companies decrease costs by reducing the number of visits of technical control specialists to test the quarry face. The proposed technique can be helpful to any mining company that supports the data collection and maintain the statistical database of measurements of the valuable component content

METHODOLOGICAL APPROACHES TO SEARCH FOR RESERVES OF DECREASING COSTS IN THE BRANCHES OF AGRICULTURAL PRODUCTION

2019 ◽  
Keyword(s):  
Agricultural Production ◽  
Raw Materials ◽  
Cost Calculation ◽  
Cattle Breeding ◽  
Method Of Calculation ◽  
Prime Cost ◽  
Dairy Cattle Breeding ◽  
Methodological Approaches ◽  
Definition Of ◽  
Qualitative Characteristics

In this article approaches to search for reserves of decrease in cost of agricultural production are considered. The methods of cost calculation of dairy cattle breeding products used at the studied enter-prise are analysed, short characteristic of the standard method offered by the Ministry of Agriculture is given, and calculations of alternative options are also carried out. Today creation of accounting of a production unit is very important so that not only weight units must be considered in it, but also the quali-tative structure of products must be reflected. Definition of qualitative characteristics and technological properties by production of milk which depend on use purposes can be an example. The raw materials consumption on a unit of production and its quality and also firmness of storage depends on technologi-cal properties of milk. At calculation of prime cost taking into account qualitative characteristics for cal-culation milk in terms of basic fat content undertakes. The method of calculation of prime cost consider-ing qualitative characteristics is the most expedient as prime cost of 1 c of milk unlike the operating tech-nique is lower. In the article analytical methods of reserves calculation for decrease in prime cost taking into account various factors are proved. The revealed reserves will allow an enterprise to expand its in-vestment opportunities in the future, they will give an additional incentive of modernization of the worn-out machinery and equipment in branches of agriculture.

scholarly journals Optimization of agglomeration burdens by metallugical properties complex. Report 1. Optimization of agglomeration burdens by technological characteristics of sinter production

2018 ◽  
pp. 27-34 ◽  
Author(s):  
A. V. D’yakov ◽  
A. A. Odintsov ◽  
V. A. Kobelev ◽  
G. A. Nechkin
Keyword(s):  
Iron Ore ◽  
Raw Materials ◽  
Partial Replacement ◽  
Specific Productivity ◽  
Metallurgical Properties ◽  
Agglomeration Process ◽  
Component Content ◽  
Ore Burden ◽  
Production Areas

Despite a lot of studies of iron ore raw materials was carried out both in sinter and BF production areas, the matter of agglomeration burdens optimization is still actual. Laboratory studies on sintering of agglomeration burdens of different component content were carried out for optimization of iron ore burden content optimization, following by determination of technology characteristics and metallurgical properties complex.As a result of the studies an optimal component and size content of the agglomeration burden determined to provide improving of metallurgical properties complex of agglomeration burden. The studies carried out showed, that lime introducing into the concentrate flow before the burden department can lead to sintering machines productivity increasing.The burden wetness range determined, enabling for complete lime hydrating. It was shown, that a partial replacement of agglomeration ores in the burden by BOF nickel slag contributes to agglomeration process specific productivity increasing as well as sinter strength increasing.

Methodical Basis of Investigation of Influence of the Iron Ore Materials and Coke Metallurgical Characteristics on the Blast Furnace Smelting Efficiency

2012 ◽  
Vol 602-604 ◽  
pp. 365-375 ◽  
Author(s):  
Andrey N. Dmitriev ◽  
Galina Yu. Vitkina ◽  
Yu.A. Chesnokov
Keyword(s):  
Blast Furnace ◽  
Laboratory Tests ◽  
Iron Ore ◽  
Analytical Study ◽  
Raw Materials ◽  
Blast Furnace Smelting ◽  
Metallurgical Properties ◽  
Methodical Basis ◽  
Definition Of ◽  
Furnace Smelting

A new method of the estimation of influence of the iron ore materials and coke metallurgical properties on the efficiency of blast furnace smelting is developed. It consists in the following stages: the laboratory tests with the definition of the iron ore materials and coke metallurgical properties; the analytical study of the influence of these characteristics on the efficiency of blast furnace smelting using by mathematical models; the experimental industrial and industrial tests. The developed methodological basis allows to obtain improved criteria for evaluating the metallurgical characteristics of the raw materials and to explain the mechanism of their effect on the reaction of the direct and indirect recovery in the blast furnace. Therefore it allows to formulate recommendations to improve the blast furnace smelting technology.

scholarly journals Geophysical methods for controlling the useful component content as the basis for the quality management system at mining and processing enterprises

2020 ◽  
Vol 29 (1) ◽  
pp. 3-15
Author(s):  
Albert А. Аzarian ◽  
Wolodymyr А. Аzarian
Keyword(s):  
Quality Control ◽  
Quality Management ◽  
Management System ◽  
Iron Ore ◽  
Quality Management System ◽  
Raw Materials ◽  
Geophysical Methods ◽  
Operational Quality ◽  
Processing Plants ◽  
Component Content

The article is devoted to substantiating the possibility of creating a common quality management system for iron ore plants based on geophysical methods of operational quality control for mineral raw materials. Due to the fall in prices on the world markets of iron ore raw materials, the financial and economic situation of the mining and processing enterprises in Ukraine has significantly worsened. Thus, the problem of effective control and quality management in mining has become of maximum importance. The availability of timely and reliable information about the content of the useful component will allow responding quickly, forming an integrated final ore cargo flow of the plant of exact quality required by the mining and concentration complex. The need to create a common quality management system is dictated by the fact that the iron ore has a heterogeneous distribution of the useful component content within the deposit, the extraction and transport equipment operates irregularly, resulting in ore cargo flows of various degrees of integration have significant amplitude and frequency oscillations, both by quality and quantity indicators. The instability of the useful component content in the ore cargo, which is aimed at enrichment, leads to a decrease in concentrate output, increase of losses in the tails, costs increase, decrease of the enterprise profit and decrease of its competitiveness. The mathematical model of ore cargo flow formation, which has a range of limitations on quality characteristics, is given. The structure and functional scheme of the quality management system of the mining and processing plant are substantiated. As a result of theoretical studies, the possibility of using radiometric and magnetometric methods for the operational quality control of the iron ore raw materials in the conditions of mining and processing plants by geophysical devices developed by the staff of the problem-branch laboratory of the Kryvyi Rih National University and Rudpromheofizyka LLC is substantiated. The basic technological characteristics of devices and systems are given, information on their introduction into production is provided. It is concluded that the researches carried out and the devices introduced on their basis have created objective prerequisites for substantiating the quality management system at mining and processing plants. The devices and operational control systems based on geophysical methods allow to cover all major stages of mining and processing, to receive timely and reliable information on the condition and dynamics of changes in the useful component content, to efficiently quality management at mining and processing plants, to increase the enterprises competitiveness and profitability.

scholarly journals Studies of Conventional and New Technologies for Preparation of Iron Ore Raw Materials at Iron Making Plant of Pao Severstal to Evaluate Prospectives for Reduction of Ecological Load on Environment

2020 ◽  
Author(s):  
T.V. Detkova ◽  
A.A. Kalko ◽  
A.A. Eliseev
Keyword(s):  
Iron Ore ◽  
New Technologies ◽  
Raw Materials ◽  
Chemical Processes ◽  
Recycled Materials ◽  
Waste Products ◽  
Technological Processes ◽  
Sinter Strength ◽  
Recycled Waste ◽  
Qualitative Characteristics

The experts of Centre for Raw Materials Investigations (CRMI) have conducted research into the usage of recycled materials in the following technological processes: sintering and briquetting. Research shows variation in emissions containing sinter gases and qualitative characteristics of the finished product (cold and hot sinter strength). It is suggested that involvement of recycled waste products of steelmaking and chemical processes shall be increased using the method of vacuum extrusion. Keywords: sintering, recycled materials, sinter gas, briquettes

scholarly journals The physicochemical bases of the pyrometallurgical processing of the titanomagnetite ores

2017 ◽  
Vol 89 (10) ◽  
pp. 1543-1551 ◽  
Author(s):  
A. N. Dmitriev ◽  
G. Yu. Vitkina ◽  
R. V. Petukhov
Keyword(s):  
Experimental Study ◽  
Blast Furnace ◽  
Coke Consumption ◽  
Iron Ore ◽  
Raw Materials ◽  
Blast Furnace Smelting ◽  
Melting Temperatures ◽  
Pyrometallurgical Processing ◽  
Qualitative Characteristics ◽  
Furnace Smelting

AbstractThe questions of an experimental study on the qualitative characteristics of iron ore raw materials (durability, reducibility, softening and melting temperatures) and their influence on indicators of blast furnace smelting (coke consumption and productivity) are considered.

International Supply Chains in APR

2015 ◽  
pp. 48-55
Author(s):  
V. Sokolov
Keyword(s):  
Supply Chains ◽  
Raw Materials ◽  
Computer Industry ◽  
Vertical Specialization ◽  
Industrial Countries ◽  
International Production ◽  
Computing Machinery ◽  
Labor Division ◽  
Definition Of ◽  
Made In China

The article considers the problem of international supply chains in machinery-building. The meanings of appropriate terms are specified (outsourcing, international production sharing, vertical specialization). It is clarified (following D. Hummels et al.) the definition of vertical specialization as a structure of supply chain when a country is using imported inputs to produce goods for exports. It is emphasized that countries exporting raw materials usually show high share of vertical specialization-based trade in their exports but not in imports. Developed industrial countries (excluding Japan) usually show high content of vertical specialization-based trade in both exports and imports. Statistical analysis of the intra-industry labor division in the office, accounting and computing machinery of Asia and Pacific is made. In China and Japan most inputs consumed by office, accounting and computing machinery are of domestic origin. The larger share of intermediate production of the office, accounting and computing machinery, consumed by the same branch, in China is of domestic origin, too. It means that a queue of successive components of supply chains is placed on the territory of China. At the same time, what concerns the territory of Korea assembling industries are prevailing. In USA and Japan the branch is using as inputs mostly intermediate production of domestic origin. Still, a larger fraction of the intermediate production of the computer industry itself is imported. In the four from five countries reviewed (USA, Japan, Republic of Korea, Thailand) the imported intermediate production for computer industry used by the respective industry as inputs is larger than the domestic production. This proves high degree of internationalization of this industry in Asia and Pacific.

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.

INTEGRAL INDEX OF QUALITY OF IRON ORE RAW MATERIALS AND PREDICTING COMPOSITION OF PIG IRON

Metallurg ◽  
2021 ◽  
pp. 14-19
Author(s):  
P.I. Chernousov ◽  
S.N. Seregin ◽  
R.E. Grishin ◽  
Ya.S. Tsvily
Keyword(s):  
Iron Ore ◽  
Raw Materials ◽  
Pig Iron ◽  
Integral Index ◽  
Index Of Quality

Processing Technogenic Raw Materials-Phosphorus Slags with the Production of Precipitated Nanosilica and Simultaneous Recovery of Valuable Components

2021 ◽  
Vol 316 ◽  
pp. 637-642
Author(s):  
Yelena G. Bochevskaya ◽  
Zaure B. Karshigina ◽  
Aynash S. Sharipova
Keyword(s):  
Specific Surface ◽  
Raw Materials ◽  
Nitric Acid Concentration ◽  
Process Conditions ◽  
Flow Sheet ◽  
Process Duration ◽  
Precipitated Silica ◽  
Component Content ◽  
Slag Processing ◽  
White Soot

The paper provides a flow sheet of the phosphorus slag processing to produce precipitated silica (white soot). The process conditions for opening phosphorus slag at the I stage of leaching have been selected: the nitric acid concentration is 3.5 mol/dm3; the ratio S:L = 1:3.5; the temperature is 60 oС; and the process duration is 1 hour. The parameters of the white soot production II stage have been determined: the HNO3 concentration is 6.5 mol/dm3; the ratio S:L = 1:3.5; the temperature is 50 oС; and the process duration is 1 hour. The temperature effect on the white soot structure and the specific surface have been established. At optimal process parameters, the white soot batches have been obtained with the main SiO2 component content of 88.2 and 90.5 %, and a specific surface of 170 and 182 m2/g, respectively. The through recovery of silicon into a commercial product is 98.0 % of its initial content in slag.

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