| Utilization of By-product Dolomite Fines from Rock
Phosphate Ore for Steel Plant Application |
A. GHOSH, P. K. DAS, J. R. BISWAS,
S. K. DAS AND G. BANERJEE
Pages : 116-120
DOI : 10.1080/0371750X.1987.10822847 |
| Abstract |
| Two hundred thousand tons of relatively pure grade of dolomite
fines are likely to be generated per annum in course of beneficiation
of the low grade rock phosphate ore of Jhamarkotra Mines, Rajasthan
by Rajasthan State Mines and Minerals Ltd. The material contains
CaO 33%, MgO 19-20%, SiO, less than 0.1% and P"05 1.0~~
by wt, and is extremely fine (>90% -170 BS sieve).
Chemical analysis, TGA, DTA and X-ray analysis of the above
sample have been carried out. The material has been sintered both
by single stage and double stage sintering process at 1650°C. The
bulk density of the material achieved by single stage process with
additive is around 3.19 gm.cm-3 and by double stage sintering
process is 3.32 gm.cm-3• A comparative study in terms of hydration
resistance by ASTM-C492 method of the present material and those
currently being used by Indian Steel Plants has shown much improved
shelf-life of the former. The developed material exhibits high potentiality
as lining material in LD converters in steel industry due to
low flux content, high density and improved resistance to hydration. |
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