On Hydrogen Equilibria in the System Water Vapour-Molten Slag-Molten Iron

Abstract Drops of molten cast iron were placed on moulding sand substrates. The composition of the forming gaseous atmosphere was examined. It was found that as a result of the cast iron contact with water vapour released from the sand, a significant amount of hydrogen was evolved. In all the examined moulding sands, including sands without carbon, a large amount of CO was formed. The source of carbon monoxide was carbon present in cast iron. In the case of bentonite moulding sand with seacoal and sand bonded with furan resin, in the composition of the gases, the trace amounts of hydrocarbons, i.e. benzene, toluene, styrene and naphthalene (BTX), appeared. As the formed studies indicate much higher content of BTX at lower temperature it was concluded that the hydrocarbons are unstable in contact with molten iron.

Download Full-text

On the absorption of water by cotton and wool

Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character ◽

10.1098/rspa.1907.0032 ◽

1907 ◽

Vol 79 (529) ◽

pp. 204-205 ◽

Cited By ~ 9

Keyword(s):

Carbon Dioxide ◽

Water Vapour ◽

Air Temperature ◽

Amorphous Carbon ◽

The Law ◽

Relationship Of ◽

Low Pressures ◽

The Relationship ◽

System Water ◽

Mechanical Rigidity

In a footnote to my paper entitled “ The Law of Distribution where one of the Phases possesses Mechanical Rigidity," I attempted to show how the results obtained by Professor Trouton for the absorption of water vapour by cotton could be reconciled with those obtained by me in the case of similar systems, such as carbon dioxide and amorphous carbon. As the apparatus I had employed in the investigation referred to was particularly suited to the accurate measurement of low pressures, I obtained Professor Trouton’s permission to repeat his work, and to investigate the relationship of pressure and concentration for the systems water-cotton and water-wool at the temperature of melting ice. I was particularly anxious to redetermine the lower portions of the curves, for as in Professor Trouton’s experiments the material was dried at the air temperature, it appeared probable that it contained water at the commencement of the experiment, and that the true origin of his curves lay further to the left than the results appeared to show. If this were the case, the true curve representing equilibrium in the system water-cotton might closely resemble those representing equilibrium in the system carbon dioxide and amorphous carbon.

Download Full-text

Reducing Rate of Iron Oxide in Molten Slag by Carbon in Molten Iron

Transactions of the Iron and Steel Institute of Japan ◽

10.2355/isijinternational1966.24.808 ◽

1984 ◽

Vol 24 (10) ◽

pp. 808-815 ◽

Cited By ~ 4

Author(s):

Akira SATO ◽

Goro ARAGANE ◽

Fumio HIROSE ◽

Ryuichi NAKAGAWA ◽

Shiro YOSHIMATSU

Keyword(s):

Iron Oxide ◽

Molten Slag ◽

Molten Iron

Download Full-text

Diffusivities in Molten Slag, Molten Iron, Steel and Refractories

Tetsu-to-Hagane ◽

10.2355/tetsutohagane1955.68.13_1694 ◽

1982 ◽

Vol 68 (13) ◽

pp. 1694-1705 ◽

Cited By ~ 9

Author(s):

Kazuhiro NAGATA ◽

Nobuhiro SATA ◽

Kazuhiro GOTO

Keyword(s):

Molten Slag ◽

Molten Iron

Download Full-text

Corrosion behaviour and corrosion mechanism of corundum block and mullite block in hearth of blast furnace

Metallurgical Research & Technology ◽

10.1051/metal/2021071 ◽

2021 ◽

Vol 118 (5) ◽

pp. 511

Author(s):

Shun Yao ◽

Heng Zhou ◽

Shengli Wu ◽

Bo Song ◽

Mingyin Kou

Keyword(s):

Corrosion Resistance ◽

Blast Furnace ◽

High Temperature ◽

Corrosion Rate ◽

Molten Slag ◽

Molten Iron ◽

Transport Rate ◽

Diffusive Transport ◽

The Matrix ◽

Corrosion Mechanisms

A ceramic cup is often used to prolong the hearth life of a blast furnace (BF). Corundum blocks and mullite blocks are two kinds of refractories widely used for building ceramic cups in China. Therefore, research on the corrosion resistance of these two kinds of refractories is beneficial to realize the BF longevity. In this study, the corrosion behaviours and corrosion mechanisms of molten slag and molten iron on corundum block and mullite block samples were investigated by corrosion tests. The results show that the slag corrosion resistance of corundum block was better than that of mullite block, and the corrosion mechanisms of molten slag on corundum block and mullite block were different. The aggregates fell from the matrix of the corundum sample when the matrix was corroded to a certain degree by slag, and the corrosion rate of slag on the corundum sample was controlled by the diffusive transport rate of a substance and the chemical reaction rate between slag and matrix. However, the aggregate and matrix of the mullite sample was corroded by slag at the same time, and the corrosion rate of slag on the mullite sample was controlled by the diffusive transport rate of Ca through the newly formed reaction layer. Moreover, the corundum block and mullite block had excellent iron corrosion resistance. The high temperature of molten iron led to an in situ reaction to generate a mullite phase in the corundum sample, and the high temperature affected the microstructure of the corundum block and mullite block.

Download Full-text