加拿大夜鹰桥公司（Falconbridge）实验室研究出一种浮选工艺，利用了二氧化硫—二乙撑三胺组合药剂抑制磁黄铁矿使之与镍黄铁矿及黄铜矿分离。DETA难以单独对取自选厂或实验工厂矿浆流中具有较高氧化还原电位的样品产生浮选选择性．但是发现DETA在一定条件下对实验室制备的样品作用良好。热力学计算表明，当有足量的黄药与DETA存在时，二羟基黄原酸铁和双黄药能在氧化环境中生成，这与抑制效果差的结果是一致的．同样地，单独加二氧化硫亦难以抑制磁黄铁矿。但是，使用组合药剂可有效地使磁黄铁矿同镍黄矿及黄铜矿分离．本文提到了该选择性浮选体系的各个方面并讨论了可能的作用机理。 Falconbridge Laboratories in Canada has developed a flotation process that utilizes pyrithione-diethylenetriamine combinations to inhibit pyrrhotite from separation from pentlandite and chalcopyrite. It is difficult for DETA to separately produce flotation selectivity for samples with higher redox potential in the pulp stream taken from a select or pilot plant. However, DETA was found to work well with lab-prepared samples under certain conditions. Thermodynamic calculations show that iron and xanthogen can be produced in an oxidizing environment when sufficient amounts of xanthate and DETA are present, consistent with the poor suppressive effect. Likewise, pyrite alone can be difficult to suppress with sulfur dioxide alone. However, the use of a combination of agents effectively separates pyrrhotite from nickel yellow ore and chalcopyrite. This article mentions all aspects of this selective flotation system and discusses the possible mechanisms of action.