scholarly journals Exergy analysis of silicon content in hot metal and its temperature influence on energy efficiency of “BF shop – BOF shop” complex operation

2019 ◽  
Vol 75 (2) ◽  
pp. 189-197 ◽  
Author(s):  
A. L. Chaika ◽  
A. G. Chernyatevich ◽  
A. A. Sokhatskii ◽  
A. A. Moskalina ◽  
T. S. Golub ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Blast Furnace ◽  
Silicon Content ◽  
Exergy Analysis ◽  
Pulverized Coal ◽  
Hot Metal ◽  
Complex Operation ◽  
Coal Fuel ◽  
Pulverized Coal Fuel ◽  
Exergy Losses

Application of pulverized-coal fuel in BF production results in changes of blast furnace heat operation, in particular, in hot metal temperature and silicon content in it changes, that effects the energy efficiency of “BF shop – BOF shop” complex operation. Isolated consideration of energy utilization by facilities (blast furnace, basic oxygen furnace) without taking into account their energy-technological ties does not provide steel smelting rational solutions obtaining. An exergy analysis of silicon content in hot metal and its temperature influence on energy efficiency of “BF shop – BOF shop” complex operation accomplished by application of the elaborated method of calculation of complete energy balance of “BF shop – BOF shop” system under existing conditions of pulverized-coal fuel application in Ukraine. It was shown, that silicon content decreasing down to level, which does not allow malfunctions of BF heat operation is strategically important for improving of energy efficiency of “BF shop – BOF shop” complex operation under conditions of pulverized-coal fuel application in BF production. It was determined, that under conditions of pulverized-coal fuel application in “BF shop – BOF shop” system, silicon content in hot metal decrease by 0.1% results in decreasing of exergy losses by 18–180 MJ/ton of steel, which is equivalent to standard fuel consumption decrease by 0.5–6.0 kg/ton of steel, increase of hot metal production by ~0.3–1.2 %. Hot metal temperature in blast furnace increase by 50 °С results in exergy losses decrease by 26–29 MJ/ton of steel, which is equivalent to standard fuel decrease by 0.9–1.0 kg/ton of steel.

Improvement of Blast Furnace Energy Efficiency by Injection of Preheated Pulverized Coal Fuel with Iron Oxides

2021 ◽  
Vol 51 (7) ◽  
pp. 468-474
Author(s):  
A. A. Moskalina ◽  
A. L. Chaika ◽  
B. V. Kornilov ◽  
V. V. Lebed’ ◽  
M. G. Dzhigota
Keyword(s):  
Energy Efficiency ◽  
Blast Furnace ◽  
Iron Oxides ◽  
Pulverized Coal ◽  
Coal Fuel ◽  
Pulverized Coal Fuel

Study of Heat Losses in a Blast Furnace with the Injection of Pulverized-Coal Fuel Into the Hearth

Metallurgist ◽  
2015 ◽  
Vol 59 (1-2) ◽  
pp. 16-24 ◽  
Author(s):  
V. I. Andreev ◽  
A. V. Pozdnyakov ◽  
Yu. L. Kurbatov ◽  
I. V. Mishin ◽  
D. S. Pikalov
Keyword(s):  
Blast Furnace ◽  
Heat Losses ◽  
Pulverized Coal ◽  
Coal Fuel ◽  
Pulverized Coal Fuel

Study of a blast-furnace smelting technology which involves the injection of pulverized-coal fuel, natural gas, and an oxygen-enriched blast into the hearth

Metallurgist ◽  
2006 ◽  
Vol 50 (5-6) ◽  
pp. 235-240 ◽  
Author(s):  
A. N. Ryzhenkov ◽  
S. L. Yaroshevskii ◽  
V. P. Zamuruev ◽  
V. E. Popov ◽  
Z. K. Afanas’eva
Keyword(s):  
Blast Furnace ◽  
Natural Gas ◽  
Pulverized Coal ◽  
Blast Furnace Smelting ◽  
Coal Fuel ◽  
Pulverized Coal Fuel ◽  
Furnace Smelting

Development of the technology of injecting pulverized-coal fuel into the blast furnace (Analysis of world practice for the period 1993–1997)

Metallurgist ◽  
1998 ◽  
Vol 42 (8) ◽  
pp. 302-309 ◽  
Author(s):  
V. A. Nozdrachev ◽  
A. Formoso ◽  
A. I. Babich ◽  
S. L. Yaroshevskii ◽  
L. Garcia
Keyword(s):  
Blast Furnace ◽  
Pulverized Coal ◽  
Coal Fuel ◽  
Pulverized Coal Fuel

Effect of Pulverized-Coal Fuel on the Emissivity of the Tuyere Zone and the Thermal Regime of the Hearth of a Blast Furnace

Metallurgist ◽  
2013 ◽  
Vol 57 (3-4) ◽  
pp. 284-291 ◽  
Author(s):  
S. L. Yaroshevskii ◽  
Yu. L. Kurbatov ◽  
I. V. Mishin ◽  
A. V. Kuzin
Keyword(s):  
Blast Furnace ◽  
Thermal Regime ◽  
Pulverized Coal ◽  
Tuyere Zone ◽  
Coal Fuel ◽  
Pulverized Coal Fuel

scholarly journals INFLUENCE OF BLOWING PARAMETERS AND SLAG REGIME ON SILICON AND SULFUR CONTENT IN BLAST-FURNACE CAST IRON

2021 ◽  
Vol 1 (38) ◽  
pp. 7-14
Author(s):  
M. Kuznetsov ◽  
G. Kryachko
Keyword(s):  
Blast Furnace ◽  
Cast Iron ◽  
Sulfur Content ◽  
Silicon Content ◽  
Furnace Operation ◽  
Pulverized Coal ◽  
Operating Conditions ◽  
Noticeable Effect ◽  
Silicon Oxides ◽  
Coal Fuel

At two blast furnaces (BF) with a volume of 1386 and 1500 m³, the influence of the parameters of blast and slag modes on the content of silicon and sulfur in cast iron was investigated. The blast mode was evaluated by the consumption of pulverized coal fuel (PCF) and oxygen, the slag mode was evaluated by its basicity CaO / SiO₂. It was found that the injection of pulverized coal into the hearth of 1500 m³ BF in the range of flow rates from 108 to 120 g/m³·s, and in the hearth of 1386 m³ BF in the range from 90 to 110 g/m³·s was accompanied by a decrease in the silicon content in cast iron. The deterioration of the transition of silicon into cast iron with an increase in the consumption of pulverized coal is explained by the complex effect of factors that retard the reduction of its oxides. Extreme relationships were also established between the intensity of melting in terms of oxygen consumption and the silicon content in the cast iron of the furnaces under study. The extreme dependences of the studied variables are due to the dual effect of the melting intensity on the reduction of silicon oxides: a reduction in the time of contact of the metal with furnace gases reduces the possibility of transition of silicon into metal, and an increase in the volume of the silicon reduction zone improves these possibilities. When operating a 1386 m³ furnace on calcium slag in the range of CaO / SiO₂ basicity change from 0.9 to 1.3 without removing the blast furnace operation periods associated with a change in operating conditions, the absence of dependence of the silicon content in cast iron on the CaO/SiO₂ modulus was found/ In its turn this indicated the complexity of factors influencing the reduction of silicon oxides. In the same range of changes in basicity and different operating modes of the furnace, a noticeable effect of basicity on the sulfur content in cast iron was observed, which indicates the decisive role of basicity in the process of blast-furnace desulfurization.

Factors limiting the injection of pulverized-coal fuel on blast furnaces

Metallurgist ◽  
1990 ◽  
Vol 34 (3) ◽  
pp. 53-53
Author(s):  
V. A. Nozdrachev ◽  
A. M. Spirin ◽  
E. N. Skladanovskii
Keyword(s):  
Pulverized Coal ◽  
Blast Furnaces ◽  
Coal Fuel ◽  
Pulverized Coal Fuel
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