Реологические характеристики суспензий в процессах кислотной переработки фосфорита Полпинского месторождениястатья
Статья опубликована в журнале из списка RSCI Web of Science
Статья опубликована в журнале из перечня ВАК
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 26 февраля 2018 г.
Аннотация:One can see that there is the global trend all over the world of progressive depletion of industrially significant deposits of phosphate ores. Besides, there is reducing containing of the main’s component, phosphorus pentoxide, and amount in it at all. It’s requires from manufacturers of mineral fertilizers to pay attention on a poor ores and a low grade phosphate raw materials. The study of its physical, chemical and technological features is directed on a search of the effective ways of their processing in to phosphoric acid and phosphate-based fertilizers. The processing of the poor and low grade phosphate to certified products is complicated by a high content of impurity species in it. These species have a close mutual germination of phosphate minerals that it is necessary to consider at adaptation of the new types of raw materials to the industrial technological schemes or in case of developing of a new effective ways of their processing. Focusing on the production of complex fertilizers by the nitric acid decomposition of Polpinsky phosphorite, in the present work it have been researched one of the most important properties of reaction slurries, obtaining during the acid decomposition of phosphate raw materials, the rheology of slurries at the stape of decomposition, ammonization and mixing with potassium containing component. The influences of the initial concentration of acid, the molar relation of ammonia and phosphoric acid, the ratio of liquid and solid phases and influence of potassium chloride adding for the viscosity of the obtained suspensions are shown. For the studied suspensions the dependence of viscosity on shear rate for the all above mentioned stapes was obtained. The fundamental technological feasibility of nitric acid processing of Polpinsky deposit phosphorite to the complex nitrogen-phosphorus- and nitrogen-phosphorus-potassium fertilizers is shown. Herewith the high extent of raw material decomposition, about 99 per cents, and convey the phosphorus in digestible form in to the product was achieved.