Behaviors of Chlorine in Smelting Process of Blast Furnace

2011 ◽  
Vol 396-398 ◽  
pp. 152-156 ◽  
Author(s):  
Bin Sheng Hu ◽  
Yong Liang Gui ◽  
Hua Lou Guo ◽  
Chun Yan Song
Keyword(s):  
Blast Furnace ◽  
Low Temperature ◽  
Metal Cation ◽  
Iron Ore ◽  
Reduction Process ◽  
Normal Operation ◽  
Smelting Process ◽  
Coke Reactivity ◽  
Blast Furnace Gas ◽  
Organic Speciation

The existence forms of chlorine entered into blast furnace are chloride created by Cl- and metal cation or organic speciation absorbed in specular coal or structure macromolecule of coal. The chlorine entered into blast furnace merges with blast furnace gas in the form of HCl after conducted a series of chemical reactions. With the increasing of HCl content in blast furnace gas, the coke reactivity decreases and the coke post reaction strength increases, and the reduction process of iron ore is restrained and the low temperature reduction degradation property increases. However, the corrosion of gas pipeline and TRT blade is aggravated by the HCl in blast furnace gas, and then blast furnace gas conveying process and normal operation of TRT unit are affected.

scholarly journals Raceway Smelting Reduction Process with Fine Iron Ore Injection from Blast Furnace Tuyeres

1993 ◽  
Vol 79 (10) ◽  
pp. 1151-1156 ◽  
Author(s):  
Kentarou NOZAWA ◽  
Koichiro SHIBATA ◽  
Masakata SHIMIZU ◽  
Heinrich Wilhelm GUDENAU
Keyword(s):  
Blast Furnace ◽  
Iron Ore ◽  
Reduction Process ◽  
Smelting Reduction ◽  
Fine Iron

Study of solid mushroom formation in direct iron ore smelting reduction process using low temperature water model

2003 ◽  
Vol 30 (4) ◽  
pp. 328-336 ◽  
Author(s):  
Y. P. Hwang ◽  
C. M. Fan ◽  
Y. L. Chen ◽  
W. S. Hwang ◽  
I. G. Chen ◽  
...  
Keyword(s):  
Low Temperature ◽  
Iron Ore ◽  
Reduction Process ◽  
Water Model ◽  
Smelting Reduction ◽  
Temperature Water

Production Process Optimization of Mongolian Iron Ore Pellets for Baogang Group

2015 ◽  
Vol 751 ◽  
pp. 35-39
Author(s):  
Zhuo Tuan Guo ◽  
Yong Guo ◽  
Di Wu ◽  
Jun Peng ◽  
Yong Bing Wang ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Production Process ◽  
Iron Ore ◽  
Reduction Process ◽  
Expansion Rate ◽  
Iron Ore Pellets ◽  
Ore Pellets ◽  
Preheating Temperature ◽  
Roasting Temperature ◽  
Roasting Time

Baogang Group imported large quantities of Mongolian iron ore to solve the shortage of ironmaking raw materials. But the basic parameters of Mongolian iron ore in pellets production are deficient. In this paper, orthogonal experimental method was used in the optimization of roasting production process of Mongolian iron ore pellets. The results show that when the content of Mongolian iron ore is 55%, the factors affecting the expansion rate of pellets in order of decrease is bentonite proportion, roasting temperature, roasting time and preheating temperature. For pellets containing 55% Mongolian iron ore, the optimum roasting schemes are as follows: bentonite proportion at 3.3%, roasting temperature at 700°C, roasting time at 14 minutes and preheating temperature at 1280°C. Under this roasting scheme, the expansion rate of pellets is 13.41%, and the compression strength reaches 2275N, which meets the technological requires of large blast furnace. The main phase of the Mongolian iron ore pellets is hematite, with a porosity of 25%-30%. And the content of gangue and liquid phase is relatively low, which is beneficial to the reduction process of pellets in blast furnace.

scholarly journals Gas Turbines for Blast-Furnace Blowing

1958 ◽  
Author(s):  
G. H. Krapf ◽  
J. O. Stephens
Keyword(s):  
Blast Furnace ◽  
Gas Turbines ◽  
Iron Ore ◽  
Heat Content ◽  
Blast Furnaces ◽  
Steel Mill ◽  
Blast Furnace Gas

The steel-mill blast furnace consumes large quantities of coke, iron ore, limestone, and air. In addition to producing iron and slag, it also is a producer of large quantities of gas. For every ton of iron produced in the blast furnace, approximately 3 1/2 tons of air are consumed and 4 to 5 tons of blast-furnace gas are produced, which represents a calorific heat content equivalent to 9000 lb of steam at 450 psi and 750 F. Eighty per cent of this heat is available for the production of power and for blowing blast furnaces. This blast-furnace gas is of low btu content, ranging between 85 to 100 btu per cu.

scholarly journals Investigation of the Effects of Coke Reactivity and Iron Ore Reducibility on the Gas Utilization Efficiency of Blast Furnace

Energies ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 5062
Author(s):  
Fanchao Meng ◽  
Lei Shao ◽  
Zongshu Zou
Keyword(s):  
Blast Furnace ◽  
Iron Ore ◽  
High Reactivity ◽  
Operating Conditions ◽  
Utilization Efficiency ◽  
Coke Reactivity ◽  
Gas Utilization ◽  
Actual Operation ◽  
Solution Loss Reaction ◽  
Reduction Region

The use of coke with high reactivity in the ironmaking blast furnace (BF) has yet to be explored, and a thorough understanding is still required to clarify the effect of coke reactivity on the BF gas utilization efficiency. In this paper, a one-dimensional kinetic model of the BF is presented and the accuracy of the model is verified. The model is then applied to analyze the effect of coke reactivity on the gas utilization efficiency of the BF. The results show that, under the operating conditions considered, the height of indirect reduction region and the starting temperature of coke solution loss reaction decrease with the increase of coke reactivity. Moreover, coke reactivity is first, directly proportional to gas utilization efficiency, and then, inversely proportional to it. In addition, high-reactivity coke may not improve gas utilization efficiency in case of high H2 content. Both, lowly and highly reactive coke need to be combined with highly reducible iron ore to maximize the gas utilization efficiency. Nevertheless, only appropriately reactive coke can combine with lowly reducible iron ore to obtain an optimal gas utilization efficiency. Hence, it is necessary to select coke with appropriate reactivity, in accordance with iron-ore reducibility, instead of blindly pursuing high-reactivity coke in actual operation.

Effect of Chlorine on Combustion Process of Pulverized Coal in Tuyere Zone

2011 ◽  
Vol 291-294 ◽  
pp. 1203-1207 ◽  
Author(s):  
Bin Sheng Hu ◽  
Yong Liang Gui ◽  
Hua Lou Guo ◽  
Chun Yan Song
Keyword(s):  
Blast Furnace ◽  
Functional Groups ◽  
Distribution Ratio ◽  
Metal Cation ◽  
Combustion Process ◽  
Pulverized Coal ◽  
Tuyere Zone ◽  
Blast Furnace Gas ◽  
Effect Of Chlorine

The relation between chlorine and combustion process of pulverized coal in tuyere zone is affected by the existence form of chorine in coal. The combustion process of pulverized coal in tuyere zone is restrained by chorine of coal when the existence form of chorine is chloride created by Cl- and metal cation. The combustion process of pulverized coal in tuyere zone is improved by chorine of coal if chorine existents with the form of combination of HCl and nitrogen functional groups of coal macromolecules. Under the combustion conditions of tuyere zone in blast furnace, the distribution ratio of chlorine in unburned pulverized coal and blast furnace gas is approximately 60% and 40%, respectively.

scholarly journals Analysis of the methods of management of the domain melt on the basis of information about the form and position of the cohesive zone

2018 ◽  
pp. 151-164
Author(s):  
I.G. Muravyova ◽  
N.G. Ivancha ◽  
E.A. Beloshapka ◽  
V.I. Vishnyakov ◽  
E.P. Ermolina ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Plastic Zone ◽  
Cohesive Zone ◽  
Iron Ore ◽  
Gas Permeability ◽  
Smelting Process ◽  
Hollow Cone ◽  
Furnace Melting ◽  
And Control ◽  
Main Influence

The aim of the work is to formulate recommendations on the adoption of control actions on the course of smelting in modern conditions. The ideology of the modern intellectual decision support system for blast smelting management is based on providing the optimal plastic zone in the blast furnace (DP). Blast furnace melting control methods are based on information on the shape and position of the plastic zone in the blast furnace. According to the results of research carried out by various scientists, it was shown that the plastic zone is a hollow cone, the walls of which consist of alternating horizontal coke layers with high gas permeability and low-permeable for gas layers of iron ore materials that are in a softened, semi-molten state. The work describes the factors that determine the shape and position of the plastic zone in the DP. The analysis carried out showed that the mode of loading of charge materials has the main influence on the formation of the plastic zone. It was noted that, in addition to various modeling methods, it is advisable to create a criterion for assessing the shape and position of the plastic zone, which would take into account its thickness, profile and position in the DP, to control and control the blast smelting process. Developed recommendations for making management decisions during smelting.

Efficiency Upgrading for Blast Furnace Smelting through Use of Iron Ore Raw Materials with Various Fluxing Degree

2020 ◽  
Vol 299 ◽  
pp. 681-686
Author(s):  
Boris Yur'ev ◽  
Vladimir A. Gol'tsev ◽  
Vyacheslav Dudko
Keyword(s):  
Blast Furnace ◽  
Iron Ore ◽  
Gas Permeability ◽  
Raw Materials ◽  
Raw Material ◽  
Smelting Process ◽  
Blast Furnace Smelting ◽  
Failure Characteristics ◽  
Optimal Values ◽  
Furnace Smelting

Firing of various basicity pellets and sintering of Kachkanar concentrates were evaluated on a pilot plant. Mineral analysis was carried out for fired pellets and those reduced in a derivatograph in gas with composition close to that of blast furnace gas. Structure and metallurgical property dependence of pellets and agglomerate on their basicity was studied. Failure mechanism of fluxed pellets was considered. Blast furnace smelting process was developed for Kachkanar iron ore raw material with various fluxing degree, consisting of low-basic pellets, and high basic agglomerate characterized by low failure characteristics at reduction and ensuring high gas permeability in blast furnace top. Optimal values of agglomerate basicity, carbon content in burden and ferrous oxide in agglomerate, ensuring its high reducibility and adequate reduction degree index, were determined. Optimal ratio of pellets and agglomerate in a blast furnace, which implementation contributes to improved furnace performance, was detected.

DESIGN OF AIR PRE-HEATER FOR BLAST FURNACE GAS FIRED BOILER

2016 ◽  
Vol 1 (3) ◽  
pp. 53-59
Author(s):  
Venkateshkumar R ◽  
Kishor Kumar ◽  
Prakash B ◽  
Rahul R
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Gas
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