螢光X線分析による浮選操業の管理

抄録

For process control of flotation operation at Taro concentrator (lwateken, Japan) the routine analysis procedure of flotation samples by fluorescent X-ray spectro chemical method has been established. The use of this system has offered good chances for improvement of the process.
The samples examined are of 22 kinds, i. e. flotation feeds, concentrates and tailings of the bulk-differential flotation process, and these are consisted of pyrite, zincblende, gdena and chalcopyrite but oxidized mineral. The X-ray spectra observed are as follows: Fe-K_β1, Zn-Kα, Pb-L_β1 and Cu-Kα. The samples are prepared only with drying and deviding.
The routine 3 shifts analysing operation is carried on shift samples (22 kinds) and on the it portant batch samples (10 kinds, twice a shift), but if necessary the time lag between sampling and report of analysis can be reduced to as little as half an hour. Accuracy of the routine analyses is described. The very gain by the X-ray analysing system is advanced performance of the flotation operation, it results in reducing variation of the process, improving grade of concentrates (particularly zinc concentrate), and decreasing tailing losses.
Furthermore, a relationship is derivered between particle size and intensity (iron and lead) of the flotation feed (product of the pnmary grinding circult). Using this relationship it would be posslble to deck the slze distribution of the. sample examined in grade ofter grinding it.