A technology of production of a high-basic sinter in the agromeration workshop of Enakievo metallurgical plant and possible ways of its improvement

2020 ◽  
Vol 76 (8) ◽  
pp. 790-802
Author(s):  
I. M. Mischenko ◽  
Ya. Yu. Aslamova ◽  
N. S. Khlaponin ◽  
A. V. Kuzin ◽  
A. M. Kuznetsov ◽  
...  
Keyword(s):  
Metallurgical Plant ◽  
Iron Ore ◽  
Volume Density ◽  
Raw Material ◽  
Sintering Machine ◽  
Charge Layer ◽  
Metallurgical Wastes ◽  
In Series ◽  
Component Content ◽  
Enakievo Metallurgical Plant

During the last six years production of high-fluxed sinter at sinter workshop of Enakievo metallurgical plant is accomplished by using sinter charge, comprising almost equal shares of iron ore concentrate and metallurgical wastes. It is done because of insufficient and non-regular supplies of iron ore concentrates. The experience gained can be of some interest for specialists of sintering and BF production of other plants to ensure the operation under conditions of breach of iron ore raw material supply as well as utilization of wastes. An analytical and statistical evaluation of technical and economical indices of sintering accomplished, while component content, the charge basicity and technological conditions of it preparation and sintering variation. Results of industrial study of technological conditions and sinter production parameters presented while its basicity was varied within the range of 1.7–4.1 abs. units in some periods of 2019. Results of pilot-industrial experiments on production in the IVQ-2019 of several batches of rather strong sinter highlighted, while their basicity was varied in series from 2.0 to 5.0 abs. units. A method of adjusting of sintering speed of a high-basic charge along the width of sintering machine proposed, comprising a rational forming of the charge layer in the charging funnel and the layer profile with a concave parabola surface form along the sintering machine width. The method comprised also an increase of the charge volume density in the upper elemental layers and particularly – in the peripheral zones of general charge layer at the sintering machines pallets. Description of the charging complex on the sintering machine pallets was given. Scientific and practical recommendations elaborated for modernization the technology and technological equipment for the charge loading on the sintering machine.

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 GLOBALIZATION AS A CHALLENGE TO UKRAINIAN EXPORTERS OF IRON ORE RAW MATERIAL

2018 ◽  
Vol 4 (1) ◽  
pp. 85-92
Author(s):  
Olha Hrybinenko ◽  
◽  
Svitlana Shahoian ◽  
Keyword(s):  
Iron Ore ◽  
Raw Material

scholarly journals Application of Magnetic and Ultrasonic Methods for Determining Parameters of Ferromagnetic Components in Iron Ore Slurry Flows

2021 ◽  
Vol 15 (4) ◽  
pp. 193-200
Author(s):  
Vladimir Morkun ◽  
Natalia Morkun ◽  
Vitaliy Tron ◽  
Olga Porkuian ◽  
Oleksandra Serdiuk ◽  
...  
Keyword(s):  
Iron Ore ◽  
Magnetic Measurements ◽  
Slurry Flow ◽  
Factors Affecting ◽  
Ultrasonic Methods ◽  
Ferromagnetic Component ◽  
Accuracy Of Measurements ◽  
Slurry Flows ◽  
Component Content ◽  
Operative Control

Abstract The article considers the method for controlling the ferromagnetic component content in slurry flow by ultrasonic and magnetic measurements. One of the basic factors determining the efficiency of magnetic separators at iron ore concentration plants is the quality of distribution of the ground ore into the product containing the ferromagnetic component and the waste rock. Due to the fact that in most cases, magnetic separators extract minerals with strongly magnetic properties, it is essential to find the magnetic component content in the input ore and products of its distribution in order to improve control over the technological process. Currently, low accuracy and reliability make existing means of operative control over the ferromagnetic component content in the slurry flow inefficient. Density of slurry is one of the primary disturbing factors affecting the accuracy of measurements, and this fact determines the necessity of measuring this parameter while controlling the ferromagnetic component content. Combined methods of measurements are a promising trend in designing sensors of useful component content in the slurry flow. The article describes the method for controlling the ferromagnetic component content in slurry flow by ultrasonic and magnetic measurements.

scholarly journals Research of Loop Transferred Structures on V-Bed Flat Knitting Machine

2020 ◽  
Vol 8 (6) ◽  
pp. 2565-2570
Keyword(s):  
Mechanical Properties ◽  
Service Sector ◽  
Breaking Strength ◽  
Life Time ◽  
Volume Density ◽  
Raw Material ◽  
Loop Length ◽  
Technological Parameters ◽  
Pattern Effect ◽  
Stitch Density

Today, the production of knitwear is developing at a faster pace. In industry, trade and the service sector, the production of knitwear, combining high technology and low cost, with good consumer properties is urgently required. Consumers today are looking for comfort, fashion and style, which results in ever-changing demands on the apparel market. As the consumer’s requirements to quality and appearance of product are daily increasing, the attention to the question of replacement of a smooth cloth on wide assortment with pattern effect is sharply brought. This work deals with the analysis of technological parameters and physical-mechanical properties of the knit fabric with pattern effect. With the aim of to expand the assortments of knitwear and to use the technological capabilities of double-bed flat knitting machines in fullest extent possible, on the base of rib structure, by using of loop transference 2 new variants of combined structure were developed and recommended. Samples differ from each other by the rapport and pattern effect of the knit structure. Technological parameters, such as loop length, stitch density, surface and volume density, physical-mechanical properties, such as breaking strength and elongation of newly developed combined knit structures were also determined by experimental method. Loop length and stitch density are important variables, that by changing them, the surface and volume density can be changed, that can manage the raw material consumption and determine the quality of knit fabrics. Breaking strength and elongation are important and decisive parameters for end uses since low strength properties shorten the useful life time as well disable the functionality of these products. Patterns of influence of structural elements, such as transferred loops on the surface density and volume density of knitwear was established. It is found that offered structures have some advantages to compare to basic structure. On the aim of resource economy technology, they give a possibility of raw material expenditure decreasing 22-47%.

A Study on Energy Consumption and CO2 Emissions According to Manufacture of Recycled Rebar Using Wasted Steel from Building Demolition

2013 ◽  
Vol 357-360 ◽  
pp. 869-875
Author(s):  
Gi Wook Cha ◽  
Won Hwa Hong ◽  
Sung Woo Shin
Keyword(s):  
Energy Consumption ◽  
Iron Ore ◽  
Ghg Emissions ◽  
Raw Material ◽  
Input Output ◽  
Output Analysis ◽  
Input Output Analysis ◽  
Ghg Reduction ◽  
The Comparative Study ◽  
Building Demolition

In recent year, Korea relies on imports for most of the iron ore, the main raw material of rebar, resulting in CO2 pollution with lots of energy consumption. Hereupon, this study carried out the research on the energy consumption and CO2 emissions of the recycled rebar using the wasted steel from building demolition. For that, this study worked out the energy consumption and CO2 emissions in the process of generation, transportation and production of wasted steel and, on the basis of which, it conducted the comparative study with virgin materials. The major research results are as follows: First, the energy consumption and CO2 emissions of the recycled rebar were found to be highest in the process of its production at 89.2% and 85%, respectively. In addition, in the comparison between recycled rebar and virgin material, the former was found to be most advantageous in energy consumption. On the contrary, as for CO2 emissions, the recycled rebar showed a 88.3% reduction possibility of greenhouse gas (GHG) emissions comparing to statistics of input-output analysis based on competition inducement coefficient, but it was found to be more disadvantageous from the perspective of GHG reduction than the statistics of input-output analysis based on non-competition inducement coefficient.

Reduction of Composite Pellet Containing Indonesia Lateritic Iron Ore as Raw Material for Producing TWDI

2013 ◽  
Vol 281 ◽  
pp. 490-495 ◽  
Author(s):  
Adji Kawigraha ◽  
Johny Wahyuadi Soedarsono ◽  
Sri Harjanto ◽  
Pramusanto
Keyword(s):  
Blast Furnace ◽  
Iron Ore ◽  
Raw Material ◽  
Pig Iron ◽  
Blast Furnace Process ◽  
Composite Pellet ◽  
Furnace Process ◽  
Iron Phase ◽  
Reductive Atmosphere ◽  
Reduced Pellets

Blast furnace process is still an important process for producing pig iron. The process needs high grade iron ore and coke. The two materials can not be found easily. In addition blast furnace process needs cooking and sintering plant that produces polluted gases. Utilization of composite pellet for pig iron production can simplify process. The pellet is made of iron ore and coal. In addition the pellet can be made from other iron source and coal. This paper discusses the evolution of phase during reduction of composite pellet containing lateritic iron ore. Fresh iron ore and coal were ground to 140 mesh separately. They were mixed and pelletized. The quantity of coal added was varied from 0 %, 20 % and 29 % of pellet weight. Pellets were heated with 10 °C/minute to 1100 °C, 1200 °C, 1300 °C and 1350 °C in a tube furnace and temperature was held during 10 minutes. Heated pellets were analyzed with XRD equipment. XRD of reduced pellets showed that iron phase change with coal and temperature. Lack of coal during heating results the re-oxidation of iron phases. This process is due to replacement of reductive atmosphere by oxidative atmosphere.

Effect of raw material particle size on XRF analysis for process control of iron ore sinter.

1988 ◽  
Vol 37 (11) ◽  
pp. 607-611
Author(s):  
Kazumi MIZUKAMI ◽  
Shigeo KASAI ◽  
Naoki KASAI ◽  
Kazuhiko AMAKAWA
Keyword(s):  
Particle Size ◽  
Process Control ◽  
Iron Ore ◽  
Raw Material ◽  
Material Particle ◽  
Xrf Analysis ◽  
Iron Ore Sinter
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