TY JOUR TI RESEARCH OF THE PROCESS OF PRODUCING POTASSIUM SULFATE THERMOPHOSPHATES KW THERMOPHOSPHATES KW POTASSIUM SULFATE KW PHOSPHORITE KW PHOSPHATE LIMESTONE KW ACTIVATED CARBON KW TOTAL AND ASSIMILABLE PHOSPHORUS OXIDE KW SINTERING JO Herald of Technological University AU Shakirov, T.R. AU Panaeva, A.O. AU , .. PY 2025 IS 28 PB Kazan National Research Technological University