scholarly journals The examination of the aspiration system of the casting yard, bunker overpass, receiving device with transshipment units of the blast furnace «Rossiyanka»

2019 ◽  
Vol 3 ◽  
pp. 20-27
Author(s):  
SHushlyakov D.A. ◽  
Kubyshkin A.V. ◽  
Soldatov D.A.
Keyword(s):  
Blast Furnace ◽  
Cast Iron ◽  
Suspended Solids ◽  
Gas Content ◽  
Iron And Steel ◽  
Gas Cleaning ◽  
Aspiration System ◽  
Quality Product ◽  
Maximum Allowable Concentrations ◽  
Iron And Steel Works

Problems in existing suction systems of casting yard, bunker rack, receiving device with transshipment units of blast furnace number 7 «Rossiyanka» of Novolipetsk Iron and Steel Works are considered. It is noted that the design capacity of the blast furnace was 9 450 tons of cast iron per day, and the blast furnace produces about 13 000 tons of cast iron per day now. The aspiration system was not designed for such a load. The increased dustiness and gas content at the workplaces leads to a number of problems: health of the plant's employees, decrease in product quality, product losses, decrease in labor productivity. It is noted that the dustiness of the air in some points of the workplace of the casting yard exceeds the maximum allowable concentration by 1.2...6 times (which is 7.2...36 mg/m3). The issues of reconstruction of existing suction systems, repair or replacement of installed equipment, improvement of local suction systems are considered. The whole range of activities carried out in the foundry yard and other processing facilities will reduce the dust concentration in the working area to the level of maximum allowable concentrations. Ways to reduce the amount of suspended solids emissions into the atmosphere to the level of 5 mg/m3 on the proposed additional gas cleaning systems are proposed. The proposed reconstructive measures will reduce the total quantity of solid emissions to the atmosphere of Lipetsk by an amount of about 1 794 kg/hour or 11 481 600 kg/year.

Ensuring the eco safety of mixing departments steel melting shops

2021 ◽  
pp. 45-51
Author(s):  
V. Kravets ◽  
◽  
S. Padalko ◽  
V. Gorovenko ◽  
◽  
...  
Keyword(s):  
Cast Iron ◽  
Nitrogen Supply ◽  
Dust Collector ◽  
Steel Melting ◽  
Compartment System ◽  
Gas Cleaning ◽  
Aspiration System ◽  
Purification Efficiency ◽  
Low Emission ◽  
New Construction

Introduction. Mixer branches of metallurgical enterprises are an intermediate link between blast furnace and steelmaking workshops. They are equipped with mixers – footer containers for storing cast iron melt. In Ukraine, mixers with a capacity of 1300 or 2500 tons are used. Technological operations are accompanied by emissions of finely dispersed brown smoke and large-dispersed graphite dust into the atmosphere. Problem. Mixer compartments of Ukrainian factories are equipped with aspiration systems that dimity emissions from cast iron pouring and draining units with the help of fume tubes, then emissions pass the dust collector and discharge into the atmosphere through a chimney. The main impact of mixer compartments on the environment is: disorganized emission through an aerodynamic dust lamp, which is not allotted by the aspiration system; organized emission through a smoke pipe of dust not caught by a dust collector; solid waste from gas cleaning and dust hoppers settling on the floor and structures of the mixer compartment from the disorganized ejection that did not come out through the lantern. The main problems are insufficient aspiration (disorganized emission) and low emission purification efficiency (emission through the chimney). A separate problem is the disposal of caught dust. The degree of aspiration in the factories of Ukraine is about 0.7 for the filling unit in the mixer and 0.8 for the drain unit from the mixer at the power of the aspiration system 150-250 thousand tons. This does not meet modern requirements. Results. Cyclones are used as a dust collector in most factories, which completely capture graphite, but are not effective enough for brown smoke. Therefore, it is proposed to use sleeve filters or electro filters. It is also possible to introduce the suppression of brown smoke with nitrogen. The use of nitrogen is possible in accordance with cyclones (for existing systems) or compatible with filters (during reconstruction or new construction). The use of suppression of brown smoke with nitrogen allows to solve the problem of disposal of caught dust, because nitrogen supply leads to enrichment of dust with graphite. The content of graphite increases from 15% to more than 30%, which converts dust from care to commodity product. Keywords: mixer, cast iron pouring, cast iron drainage, dust suppression by nitrogen, aspirational mixer compartment system.

scholarly journals ABOUT THE POSSIBILITY OF APPLICATION OF GRIND BLAST FURNACE GRANULATED SLAG PJSC “SEVERSTAL” IN CEMENT SYSTEMS

2020 ◽  
Author(s):  
Н.Н. Калиновская ◽  
К.С. Аль-Мусави ◽  
Д.В. Кузнецов
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Bending Strength ◽  
Point Of View ◽  
Iron And Steel ◽  
Granulated Blast Furnace Slag ◽  
Granulated Slag ◽  
Iron And Steel Works ◽  
Water Holding ◽  
Furnace Slag

В металлургическом производстве образуются технологические отходы (шлаки, шламы, пыль, окалина и другие), количество которых исчисляется в сотнях миллионов тонн. Одним из наиболее распространенных металлургических отходов является доменный гранулированный шлак, который при помоле приобретает гидравлические свойства и может использоваться как компонент вяжущего для цементных систем. Приведены результаты исследования свойств доменного шлака ПАО «Северсталь» (г. Череповец, РФ), а именно химический и фазовый состав предоставленных образцов шлака, а также индекс его активности по EN 15167 в зависимости от тонкости помола. На данном этапе исследований шлака не видится препятствий для использования шлака ПАО «Северсталь» в качестве компонента вяжущего в цементных системах. Показано, что с точки зрения прочности на сжатие и изгиб, а также расплыва стандартного конуса, который косвенно характеризует водоудерживающую способность вяжущего, предпочтительной является тонкость помола Sуд = 3 500…4 000 см2/г. Использование вяжущего, состоящего на 100 % из шлака, нецелесообразно без применения активатора. In the process of enrichment and smelting of metals, technological wastes (slags, sludge, dust, scale and others) are generated, the amount of which is calculated in hundreds of millions of tons. One of the local metallurgical waste is granulated blast-furnace slag, which, after grinding, acquires the hydraulic properties and can be used as a component of a binder. The results of studying the properties of blast-furnace slag of Severstal Iron and Steel Works (Cherepovets, Russia), namely the chemical and phase composition of the provided slag samples, as well as the index of its activity according to EN 15167, depending on the fineness of grinding are presented. At this stage of slag research, there are no obstacles to using slag from Severstal as a binder component in cement systems. It is shown that from the point of view of compressive and bending strength, as well as the spreading of a standard cone, which indirectly characterizes the water-holding capacity of the binder, the fineness of grinding 3500...4000 cm2/g is preferable. The use of a binder consisting of 100 % slag is not recommended without the use of an activator.

Charging System Enhancements for a Blast Furnace at Azovstal Iron and Steel Works Private Joint-Stock Corporation

Metallurgist ◽  
2019 ◽  
Vol 63 (3-4) ◽  
pp. 327-334
Author(s):  
S. V. Sosin ◽  
S. A. Karikov ◽  
V. B. Semakova ◽  
V. P. Russkikh ◽  
V. V. Semakov
Keyword(s):  
Blast Furnace ◽  
Iron And Steel ◽  
Charging System ◽  
Iron And Steel Works ◽  
Stock Corporation ◽  
Steel Works

New Monitoring System of Firebrick Lining Deterioration of Blast Furnace Devil in Metallurgical Plants of China

2013 ◽  
Vol 834-836 ◽  
pp. 939-943 ◽  
Author(s):  
Andrey N. Dmitriev ◽  
Yu.A. Chesnokov ◽  
K. Chen ◽  
O. Yu. Ivanov ◽  
M.O. Zolotykh
Keyword(s):  
Blast Furnace ◽  
Temperature Fields ◽  
Continuous Control ◽  
Two Dimensional ◽  
Blast Furnaces ◽  
Furnace Hearth ◽  
Horizontal Section ◽  
Iron And Steel ◽  
Blast Furnace Hearth ◽  
Iron And Steel Works

The mathematical description and the computer program Devil Erosion of calculation the two-dimensional temperature fields in any vertical and horizontal section of the blast furnace hearth are developed. Calculation is carry out the decision of the equations of heat conductivity with use of indications of the big number of sensing transducers of temperature (to 1000), built in the furnaces firebrick lining between the firebrick blocks. The continuous control of the temperature change in each point allows to define the remained thickness the firebrick lining and to warn, in case of need, the furnace personnel about the beginning of the firebrick lining erosion. The continuous control of change of temperature in the firebrick lining is made on the basis of mathematical model. The system of collecting, processing and transfer information from sensing transducers of temperature or thermal streams in a program database Devil Erosion is used. Programs are installed on blast furnaces of Chinese National Republic: Jinan, Jiyuan and Liuzhou Iron and Steel Works.

Experience gained in processing blast-furnace slags at the Karaganda Iron and Steel works

Metallurgist ◽  
1995 ◽  
Vol 39 (3) ◽  
pp. 54-55
Author(s):  
V. I. Ivantsov ◽  
A. I. Klimushkin ◽  
V. M. Gorobtsov ◽  
O. A. Stolyarskii ◽  
V. A. Kandybin
Keyword(s):  
Blast Furnace ◽  
Iron And Steel ◽  
Iron And Steel Works ◽  
Steel Works

Supply and Demand Forecasting of Blast Furnace Gas Based on Artificial Neural Network in Iron and Steel Works

2012 ◽  
Vol 443-444 ◽  
pp. 183-188 ◽  
Author(s):  
Qi Zhang ◽  
Yan Liang Gu ◽  
Wei Ti ◽  
Jiu Ju Cai
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Blast Furnace ◽  
Supply And Demand ◽  
Demand Forecasting ◽  
Iron And Steel ◽  
Blast Furnace Gas ◽  
Artificial Neural ◽  
Iron And Steel Works ◽  
Steel Works

Abstract.Blast Furnace Gas (BFG) system of an iron and steel works was considered. The relationship of gas amount and factors about BFG generation and consumption was analyzed by grey correlationand the BP neural network prediction model of blast furnace gaswas established based on artificial neural network for forecasting thesupply and demandof BFGinthe iron and steel-making processes.The scientific forecasting of BFG generation and consumption in each process was discussed undernormal production and accidental maintenance condition. The results show that established forecasting model is high precision, small errors, and can solve effectively actual production of BFG prediction problem and decreasing BFG flare, providing theoretical basis for establishing reasonable plans in the iron and steel works.

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