Publishing House SB RAS:

Publishing House SB RAS:

Address of the Publishing House SB RAS:
Morskoy pr. 2, 630090 Novosibirsk, Russia



Advanced Search

Chemistry for Sustainable Development

2004 year, number 2

Influence of Lignin-Like Additives on the Solubility f Mechanically Activated Phosphates

SESEGMA G. DORZHIEVA1 and JIBZEMA G. BAZAROVA2
1Buryatia State University, Ul. Smolina 24a, Ulan Ude 670000 (Russia)
2Baikal Institute of Nature Management, Siberian Branch of the Russian Academy of Sciences,
Ul. Sakhyanovoy 8, Ulan Ude 670047 (Russia), E-mail: jbaz@binm.baikal.net
Pages: 147-153

Abstract

The influence of mechanical activation conditions on the solubility of phosphate compounds of phosphorites from the Burenkhan deposit of Mongolia in 2 % solution of citric acid and in water medium was studied. It is established that the efficiency of planetary mill EI-2&x150 is considerably higher than that of vibration mill DRM-75T. As the time of activation is increased to 100 min, the assimilable phosphorus content of natural phosphates is heightened. For the vibration mill DRM-75T it is optimal to use as the milling body a steel cylindrical core with a mass of 1000 g. A mechanical activation of phosphorites was carried out with adsorbing additives in the form of lignosulphonates, zeolites and brown coals. The content of assimilable and water-soluble phosphates was determined depending on the composition and nature of additives. As the activation is continued when the amount of assimilable phosphorus is increased, the amount of water-soluble phosphorus is diminished. When lignin-containing additives are used, products with a high degree of phosphorus transition to 2 % solution of citric acid are formed with respect to activated phosphorites under equal treatment conditions. In this way, the possibility of obtaining organophosphorus fertilizers of prolonged action with various assimilability of phosphorus is estimated