Abstract A novel combined reagent dodecylamine (DDA)–2-octanol–kerosene was employed to overcome the problems associated with DDA, that is, DDA has a high freezing point and needs to be acidified with hydrochloric or acetic acid when it is used for flotation. The analysis of the basic physical properties of the agent showed that DDA–2-octanol–kerosene had significant advantages in freezing point and dispersibility and its freezing point can be reduced to below 0 °C. From the flotation results of magnetite, it can be seen that DDA–2-octanol–kerosene has a better selectivity. Response Surface Methodology based on a three-level, three-variable Box–Behnken design (BBD) was employed to define the quadratic relationship between the recovery of quartz and the composition of the mixed agent. The results indicated that the recovery of quartz increased with the increase of DDA or 2-octanol dosage, however, kerosene had a marginal positive effect on the recovery of quartz when the amount of kerosene was less than 0.76 times that of DDA and otherwise a negative effect. This study provides a new method and technical support for its industrial application for the reverse flotation of iron ore for the combination of agents in the field of iron ore flotation. And allows for a deeper macro-level understanding of the interaction between the DDA–2-octanol–kerosene ternary mixed agents.

中文翻译：

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一种新型混相捕收剂 DDA-2-辛醇-煤油：性质和浮选性能

摘要 采用一种新型的组合试剂十二胺（DDA）-2-辛醇-煤油，克服了DDA的冰点高，用于浮选时需要用盐酸或乙酸酸化的问题。 . 对该剂基本物理性质的分析表明，DDA-2-辛醇-煤油在凝固点和分散性方面具有显着优势，其凝固点可降至0℃以下。从磁铁矿的浮选结果可以看出，DDA-2-辛醇-煤油具有更好的选择性。采用基于三级、三变量 Box-Behnken 设计 (BBD) 的响应面方法来定义石英回收率与混合剂组成之间的二次关系。结果表明，随着DDA或2-辛醇用量的增加，石英的回收率增加，而当煤油用量小于DDA的0.76倍时，煤油对石英的回收率有边际正影响，反之则为负。影响。该研究为其在铁矿石浮选领域的药剂组合进行铁矿石反浮选的工业应用提供了新的方法和技术支持。并允许对 DDA-2-辛醇-煤油三元混合剂之间的相互作用有更深入的宏观理解。该研究为其在铁矿石浮选领域的药剂组合进行铁矿石反浮选的工业应用提供了新的方法和技术支持。并允许对 DDA-2-辛醇-煤油三元混合剂之间的相互作用有更深入的宏观理解。该研究为其在铁矿石浮选领域的药剂组合进行铁矿石反浮选的工业应用提供了新的方法和技术支持。并允许对 DDA-2-辛醇-煤油三元混合剂之间的相互作用有更深入的宏观理解。