The ordinary iron ore used in the production line of super iron concentrate in a Anhui powder metallurgical company is adopted as the raw material to make the the inverse flotation tests for producing the super iron ore with regrind-ing and low intensity magnetic separation to solve the problems of low recovery due to dodecylamine by adding regulators of Na2CO3, sodium silicate and starch. Then it is discussed that the productivity of inverse flotation is enhanced by improving the pulp concentration. The results show that with combination of 2 000 g/t of Na2CO3, 200 g/t of sodium silicate, 100 g/ t of starch and 130 g/t of dodecylamine, the operating recovery rate of super iron concentrate in inverse flotation under 24% of pulp density was increased to 89. 58% (89. 27% with raw materials) from 44. 61% (43. 44% with raw materials) when dodecylamine applied alone. When the pulp concentrate is increased to 28% , the capacity of inverse flotation can be improved by 16. 68% , and the iron recover still reach 87. 69% (87. 38% with raw materials).%以安徽某粉末冶金公司超级铁精矿生产线所用普通铁精矿为原料,将其再磨、弱磁再选后进行生产超级铁精矿的反浮选试验,通过添加调整剂Na2CO3、水玻璃、淀粉来解决现场单纯使用十二胺引起的反浮选回收率偏低问题,并探讨通过提高矿浆浓度来提高反浮选的生产效率.试验结果表明:将2 000 g/t Na2CO3、200 g/t水玻璃、100g/t淀粉与130 g/t十二胺配合使用,在24％矿浆浓度下,反浮选所获超级铁精矿的作业回收率可由单纯使用十二胺时的44.61％(对原料为43.44％)提高到89.58％(对原料为89.27％)；将矿浆浓度提高到28％,可使反浮选处理能力提高16.68％,而作业铁回收率仍达87.69％(对原料为87.38％).
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