2,4-二羟基苯甲酸对赤铁矿和石英的抑制性能

摘要

通过单矿物试验比较了2,4-二羟基苯甲酸对赤铁矿和石英的抑制性能,结果显示,该药剂对石英有较强的的抑制作用,而对赤铁矿的抑制作用弱得多.在矿浆pH＝8.4条件下,以30.4 mg/L油酸钠为捕收剂、40.2mg/L 2,4-二羟基苯甲酸为抑制剂分选赤铁矿与石英的人工混合矿(配比为3:2),可取得精矿铁品位64.03%、铁回收率90.66%的分选指标.动电位测试和红外光谱分析结果表明,2,4-二羟基苯甲酸在石英表面发生吸附时,依靠的是氢键作用.%The depressing performance of 2,4-dihydroxy-benzoic acid to hematite and quartz was studied via single mineral flotation and the results show that it has better depression to quartz, but less affect on hematite. When the pH of pulp is 8.4 with 30. 4 mg/L of sodium oleate as collector and 40. 2 mg/L of 2,4-dihydroxy-benzoic acid as depressant, iron concentrate grading at 64. 03％ with a 90. 66％ iron recovery was obtained from the artificial mixed ores(mixing ratio at 3:2) of hematite and quartz. The Zeta potentials measurements and FTIR spectra analysis showed that the depressing performance of 2,4-dihydroxy-benzoic acid to the surface of quartz mainly relies on the hydrogen-bonding adsorption.