METHOD FOR X-RAY DETERMINATION OF CRYOLITE RATIO DURING ELECTROLYTIC PRODUCTION OF ALUMINIUM Russian patent published in 2016 - IPC C25C3/06 G01N23/00 

FIELD: medicine.

SUBSTANCE: invention relates to a method for X-ray phase determination of cryolite ratio during electrolytic production of aluminium and can be used for determination of electrolyte composition. Method includes selecting an electrolyte sample, preparing sample for analysis, analytical measurement of intensity of diffraction lines of cryolite phase Na₃AlF₆, chiolite Na₅Al₃F₁₄, fluorite CaF₂, one and a half calcium cryolite Na₂Ca₃Al₂F₁₄, single calcium cryolite NaCaAlF₆ sodium fluoride NaF, wherein concentration of said electrolyte phases is determined by formula: $$C_j=(I_j^a/K_j^a)/({\displaystyle \sum _l^M}{I}_l^a/K_j^a),$$ , and cryolite ratio determined by formula: $$KO=\frac{2\times {\displaystyle \sum _j{\alpha }_j{C}_j}}{{\displaystyle \sum _j{\beta }_j{C}_j}},$$ where: - intensity of analytical line of j-th phase, - corundum number of j-th phase, calculated for said analytical line, M - number of fluoride phases, Cj - concentration of mineralogical sample phases; αj, βj_i - weight fractions of, respectively, NaF and AlF₃ in j-th phase.

EFFECT: simplified and increased accuracy of determination of electrolyte composition.

1 cl, 2 dwg, 4 tbl