CHLORINATION OF IRON PHOSPHIDE WITH CHLORINE AT THE PRESENCE OF OXYGEN TO PRODUCE PHOSPHORUS (V) OXIDE AND IRON (II, III) CHLORIDES
Shevko V. Aitkylov D. Badikova A. Karatayeva G. Bitanova G.
2021National Academy of Sciences of the Republic of Kazakhstan
News of the National Academy of Sciences of the Republic of Kazakhstan, Series of Geology and Technical Sciences
2021#6Issue 450163 - 171 pp.
This paper examines the research results on predicting the production of phosphorus (V) oxide and iron (II, III) chlorides from Fe2 P, which is a basic component of electrothermal ferrophosphorus. The research methods were thermodynamic modeling using the HSC-6.0 software package based on the minimum Gibbs energy and second-order rotatable designs (Box-Hunter). The aim of the research was to determine the thermodynamic possibility of obtaining gaseous iron chlorides and phosphorus (V) oxide from iron phosphide. The temperature in a range of 300-1500°C and chlorine amount effect on the behavior of iron and phosphorus in a 2Fe2 P – mCl2 – 2.5O2 system was determined at pressure of 1 bar. It was found that the temperature of the onset of iron chloride sublimation depends on the amount of chlorine and decreases from 804 to 693°C (for FeCl2) and from 777 to 412°C (for FeCl3) with an increase in the amount of chlorine from 4.0 to 6.7 kmol; the complete iron chloride sublimation occurs at 4.5-6.0 kmol of chlorine in the temperature range of 1040-1100°C; the complete transition of phosphorus from Fe2 P to P4 O10 is in the temperature range of 730-840°C and the amount of chlorine of 4.0-6.0 kmol; the minimum chlorine transition degree into a gas phase (up to 0.1%) with simultaneous complete transition of phosphorus into P4 O10 and the iron extraction degree from Fe2 P into its gaseous chlorides of 91,8% occurs at 4.0-4.3 kmol of chlorine in the temperature range of 1090-1125°C.
chlorination , chlorine , ferrophosphorus , iron chlorides , iron phosphide , oxygen , phosphorus oxides , thermodynamic modeling
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M. Auezov South Kazakhstan University, Shymkent, Kazakhstan
National Center on complex processing of mineral raw materials of the Republic of Kazakhstan, Almaty, Kazakhstan
M. Auezov South Kazakhstan University
National Center on complex processing of mineral raw materials of the Republic of Kazakhstan
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