SHERMATOV, A.; SHERKUZIYEV, D. OPTIMIZATION OF ACID DECOMPOSITION OF WASHED CALCINED PHOSPHOCONCENTRATE USING A MIXED SECONDARY SULFURIC–EXTRACTION PHOSPHORIC ACID SYSTEM: CHEMICAL AND FTIR INVESTIGATION. Scientific and Technical Journal of Namangan Institute of Engineering and Technology, [S. l.], v. 11, n. 1, p. 195–201, 2026. DOI: 10.61151/stjniet.v11i1.999. Disponível em: https://niet.uz/index.php/nj/article/view/999. Acesso em: 24 jun. 2026.