Metallurgical slags

Component Granulated blast furnaee slag from metallurgieal plant Other slags  

Undoubtedly, the increase of glass content in slag is assuring their best hydraulic properties. The water granulation, additionally under pressure, is the best method, assuring the glass content exceeding 90% [1]. 

However, this form of modulus was not accepted. As one can see, in this formula the presence of sulphide was also included. In the paste the hydrolysis of sulphide occurs with the evolution of hydrogen sulphide. 

The reactions of CaS with sulphur from slag result in the formation of calcium multi-sulphide and thiosulphate [26]  

Then the multisulphide ean reaet with CO2 from the liquid phase in the paste with evolution of hydrogen sulphide  

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Z. A. Forouhs and W. W. Smeltzer, eds.. Metallurgical Slag-Gas Reaction Processes, Electrochemical Society, Inc., Princeton, N.J., 1975. 

Other types of metallurgical slags, power station fly-ash and other waste materials can in principle also be processed in a similar way. Difficulties arise when the initial raw material shows variable composition unfavourable economic indices may be offset by the need to dispose of troublesome wastes. 

Slagsitals. The term has been derived from that used for these materials in the USSR, where both theoretical principles and industrial manufacturing processes have been evaluated. These principles permit effective utilization of waste metallurgical slags, in particular blast-furnace slags. The first products were obtained in the USSR in 1959 and at the same time a similar material was developed in Hungary (minelbit). 

Pelton, A. D. Blander, M. Computer Assisted Analysis of the Thermodynamic Properties and Phase Diagrams of Slags in Proc. Second Int l. Symp. on Metallurgical Slags and Fluxes, Fine, H. A. Gaskell, D. R., eds., TMS-AIME, Warrendale PA, 1984, pps 281-294 Blander, M. Pelton, A. D. Analyses and Predictions of the Thermodynamic Properties of Multicomponent Silicates , t6[Pg.193]

On the basis of the spectral and total normal emissivity data reported for coal and metallurgical slags,the value = 0.8 + 0.1 can be adopted for coal slags in the range (1100 - 1900 K). 

The silicate slag systems are involved in most pyro-metallurgical processes which result in the formation of a number of ferrous and non-ferrous metals (Cu, Ag, Zn, Cd Sn, Pb, Sb, Bi). These systems are oxide- and sulfide-oxide melts, and, therefore, the processes of their interaction with raw materials are dependent on the melt properties (oxidation ability, solubility of metals), and on their oxoacidic properties. Any metallurgical slag contains MgO, CaO, FeO and Si02 as one of main components. The oxidation ability of the slags increases with a rise of their basicity (increase of equilibrium O2-concentration), caused by the following electrochemical process ... 

J.A. Duffy, M.D. Ingram and I.D. Sommerville, Acid Base Properties of Molten Oxides and Metallurgical Slags, J. Chem. Soc. Faraday Trans. 74 (1978) 1410-1419. 

Dimitrova, S. Ivanov, G. and Mehandjicv, D. Metallurgical slag as a support of catalysts for complete oxidation in the presence of ozone Appi. Catai A General. 2004,266,81-87... 

Table 7.1 Chemical composition (% by mass) of metallurgical slag (analytical data obtained by R. Skomorowska)...

In special cases, for very deep bore holes cementing, the lime with quartz sand mixtures, metallurgical slags, as well as the dicalcium silicate with sand mixtures can be used [169], In Russia the slag activated with sodium compounds is used... 

J. F. L. Hausmann and Mitscherlich found among metallurgical slags crystalline products identical with natural minerals, and Berthier and Mitscherlich obtained artificial mica, pyroxene, and similar minerals by fusing silica with lime, magnesia, and ferric oxide. Some geological papers (on the metamor-... 

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