Abstract

U. B. Nazarbek*¹,  U. Besterekov¹, S. P. Nazarbekova², A. A. Bolysbek¹,

DOI : http://dx.doi.org/10.13005/ojc/310123

The results of physico-chemical and microscopic investigations of phosphorus sludge are considered. It was established that phosphorus sludge does not meet regulatory requirements for mineral fertilizing on granulometric composition. On chemical composition, phosphorus sludge is close to original phosphate raw material of Karatau deposit, but it differs from latter by its less content of phosphate component and presence of constituents of charge mixture – quartzite and coke. The results of microscopic investigations show that phosphorus sludge structure contains mainly calcium silicates, diopside, and potassium aluminosilicates. The presence of latter ones allows that phosphorus sludge is a valuable secondary phosphate raw material, quite suitable for recycling of it into phosphorus, potassium containing complex mineral fertilizer.

phosphorus sludge; microstructure; chemical analysis; granulometric composition; elemental composition; sieve analysis

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