| 1. |
- T.C., Rao, et al.
(författare)
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Characteristic curve for the coal-oil agglomeration process
- 1982
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Ingår i: International Journal of Mineral Processing. - : Elsevier BV. - 0301-7516 .- 1879-3525. ; 9:3, s. 235-243
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Tidskriftsartikel (refereegranskat)abstract
- Experiments were carried out on coal fines of two different washeries, at different periods of agglomeration, to determine the size distribution of agglomerates with changes in feed size, pulp density and furnace oil dosage. It is found that the size distribution of the agglomerates follows a self-preserving growth. This behaviour has been generalised using a reduced dimensionless size axis to obtain a characteristic curve. It is shown that this curve is affected only by the nature of the feed and not by the process variables. An equation has been suggested to quantify this characteristic curve of the oil agglomeration process.
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| 2. |
- T.C., Rao, et al.
(författare)
-
Studies on the treatment of coal fines by oil-agglomeration process
- 1982
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Ingår i: Transactions Society of Mining Engineers of AIME. - 0895204150 ; , s. 1966-1970
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Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- The effects of important variables such as pulp density, feed size, furnace oil dosage, degree of agitation, and time of agglomeration on the yield and ash content of the agglomerates obtained from the oil agglomeration of coal fines have been studied in a laboratory batch agglomeration cell. Optimum conditions for maximum yield and throughput have been discussed. The furnace oil dosage and pulp density were found to have more influence on the yield and grade of the agglomerates than the degree of agitation and feed size in the ranges studied.
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| 3. |
- Rao, K. Venkat, et al.
(författare)
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Magnetic and transport properties of transition-metal based glassy ribbons
- 1980
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Ingår i: IEEE Transactions on Magnetics. - : IEEE. - 0018-9464 .- 1941-0069. ; 16:5, s. 896-901
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Tidskriftsartikel (refereegranskat)abstract
- In this review, from our systematic studies on transition-metal based amorphous alloys of the type (AxB1-x)75P16B6Al3, where A,B, = Fe, Ni, Mn, or Co, we demonstrate that the temperature and the field dependence of the Hall resistivity, ρH , yields several useful parameters which characterize the magnetism, and the stability of these systems. The exponent for the fluctuation contribution to the magnetic susceptibility, χ, derived from these studies is found to vary from the value of 1.6, observed in general, to the Heisenberg value of 1.33 for the Fe-rich alloys. The ordinary Hall coefficient for the Ni-rich alloys is found to be negative, while a positive value is observed for all other systems studied so far. The ohmic resistivity, ρ measured simultaneously, is correlated with ρH studies in the light of current theories. It is shown that most of the T-dependence of ρ in the metal-metalloid systems is of magnetic origin. Similar studies on the binary amorphous Zr70(Fe, Co, Ni, Pd, Cu)30 alloys show that these systems can be understood only in terms of the extended Ziman theory. Finally, our recent evidence for deviations from the simple spin-wave theory in the magnetitions of amorphous Fe-Ni alloy system is correlated with ac-susceptibility studies to obtain a probable phase-diagram near the multicrtical point.
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