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对N.S.W.布罗肯·希尔铅-锌矿石浮选试验结果表明在水泥存在时,在pH 9时获得的分选效果比pH 7较低。添加2公斤/吨木屑,在pH 7时[如黑根树(blackbutt),兰桉树(blue gum),黄杨类(brushbox)和松节桉树(turpentine gum)等]仅有微弱影响,但在pH 9时,则加强了水泥的有害影响。这可认为是在pH 9时由木头产生的萃取物(例如:多酚和糖类)所引起。萃取物的比率通过紫外线(UV)吸收光谱可以看出,其比率随pH增加而增加并受各种盐类的影响。当有水泥或水泥与木料共存时添加1公斤/吨Al_2(SO_4)_3·16 H_2O结果表明,浮选获得的结果同没有水泥或木料,或木料和水泥共存时的结果极为相似。这可归因于硫酸铝添加后出现的较低pH,也可能还有特殊的化学影响。添加硫酸铝经济地解决了为布罗肯·希尔矿用水泥充填所引起的矿石污染的处理问题。
The results of the Brocken Hill Lead-Zinc ore flotation test on N. S. W. Bruton Hill show that in the presence of cement, the separation results obtained at pH 9 are lower than those of pH 7. The addition of 2 kg / ton sawdust only had a slight effect at pH 7 [eg blackbutt, blue gum, brushbox and turpentine gum etc.] but at pH At 0900 hours, the harmful effects of the cement were heightened. This is believed to be caused by wood-derived extracts (eg, polyphenols and sugars) at pH 9. The ratio of the extracts can be seen by ultraviolet (UV) absorption spectroscopy as the ratio increases with increasing pH and is affected by various salts. The results of flotation with 1 kg / ton Al 2 (SO 4) 3 · 16 H 2 O when cement or cement coexist with wood show that the results obtained by flotation are very similar to those without cement or wood or with wood and cement. This can be attributed to the lower pH appearing after the addition of aluminum sulphate and may also have special chemical effects. The addition of aluminum sulfate economically solved the disposal of ore contamination caused by Brockenhill Mine Filling cement.