Processing of phosphorites and additives with researching their thermodynamical properties

¹ Navoi State Mining and Technology University, Galaba Str. 27, 210100 Navoi, Uzbekistan
² Institute of General and Inorganic Chemistry of Academy of Sciences of the Republic of Uzbekistan, 77a Mirzo Ulugbek, 100170, Tashkent, Uzbekistan

^* Corresponding author: temirov-2012@mail.ru

Abstract

In this article, scientific research on the production of thermophosphate fertilizers was carried out on the basis of thermo-alkaline activation of Central Kyzylkum waste phosphorite with mineralized mass and alkali metal salts, namely NaCl, KCl, Na₂SO₄, K₂SO₄, Na₂CO₃, K₂CO₃ and silica at high temperature. In this case, samples are heated in muffle furnaces at temperatures of 800°C, 900°C, 1100°C, 1200°C and for 30 min, 60 min, 120 min. The total P₂O₅, assimilable P₂O₅, total СaO and total СO₂ forms of the sintered tablets were investigated. As it can be seen from the experiments conducted with mineralized mass phosphorite, alkaline salts and quartz sand, it was found that the assimilated form of СaO, P₂O₅ and the degree of decarbonation rose with increasing temperature and time.