ON THE PRODUCTION OF PURIFIED DIAMMONIUM PHOSPHATE FROM EXTRACTION PHOSPHORIC ACID BASED ON OFF BALANCE ORES OF THE KARATAU BASIN
Ключевые слова:Off-balance phosphorites, Karatau basin, diammonium phosphate, extraction phosphoric acid, drum granulator dryer, neutralization, evaporated and non-evaporated PSRM.
The problem of utilization of man-made waste from the mining complex has not lost its relevance
since the end of the last century. The amount of waste only in the «Central» mine quarry of the Zhanatas field, is
about 22 million tons of phosphate-silicon raw materials (PSRM). More than 12 million tons after flotation
enrichment were used for acid processing and as commercial phosphates for electro thermal processing. When
refining the Zhanatas quarries to the working depth, at least 18-19 million tons of PSRM will be formed .
Off-balance ores of internal overburden are represented by three special dumps of the mines "Kokjon",
"Koksu", "Tjesay", "Aksay", the volume of which is more than 3.2 million tons with a content of up to 20% P2O5.
Mineral fertilizers in the agro-industrial sector of the economy play a key role in improving crop productivity
and quality. Given the export orientation of the phosphorus industry, it cannot be considered outside of
macroeconomics, as its situation remains complex and unstable.
The practical importance of innovative research to develop technological foundations and technical solutions for
the production of diammonium phosphate (DAP) , derived from wet-process phosphoric acid (PSRM )balance
Karatau phosphorite is no doubt also compiled the original data on the establishment of a pilot plant and the
calculated techno-economic assessment of innovative industrial production.
Our proposed technology will reduce the economic costs of processing off-balance raw materials and increase
the range of phosphorus-containing products to 10-15%; increase the production of PSRM and DAP to 20-25%;
create additional jobs.
The results of innovative scientific research are applicable to the chemical enrichment of man-made waste for
target products, which are urgently needed by the agro-industrial complex, to improve the environmental and
economic indicators of industrial regions and the welfare of the population of Kazakhstan.