硫化铅锌矿的新型硫抑制剂作用机理研究

硫化铅锌矿浮选过程常采用大量石灰抑制黄铁矿，造成矿浆pH过高、管道堵塞等问题，新型抑制剂HS-1替代部分石灰可实现铅锌硫的高效分离。为进一步完善HS-1与方铅矿、闪锌矿及黄铁矿的作用机理，基于纯矿物浮选试验结果，开展了HS-1抑制机理研究。结果表明：①矿浆pH=10时，以乙硫氮+丁铵黑药（物质的量之比2∶1）为组合捕收剂、HS-1为抑制剂，能有效抑制黄铁矿，部分抑制闪锌矿，而对方铅矿浮选行为基本无影响；②抑制剂HS-1对捕收剂在方铅矿表面的吸附几乎没有影响，减少了乙硫氮+丁铵黑药在闪锌矿表面的吸附量，能有效抑制组合捕收剂在黄铁矿表面的吸附量。③在pH=10时，HS-1和组合捕收剂先后与3种纯矿物作用后，矿物表面均出现了HS-1的红外特征吸收峰，方铅矿表面捕收剂的特征吸收峰无明显变化，闪锌矿及黄铁矿表面捕收剂的吸收特征峰消失，说明HS-1有效抑制了捕收剂在黄铁矿的吸附，并对闪锌矿产生一定抑制作用。

Study on the Action Mechanism of Novel Surfur Inhibitor of Lead-zinc Sulphide

In the flotation process of lead-zinc sulfide ore， a large amount of lime is used to inhibit pyrite， resulting in problems such as high pH of pulp and pipe blockage. The new inhibitor HS-1 could replace part of lime to achieve efficient separation of lead， zinc and sulfur. In order to further improve the interaction mechanism of HS-1 with galena， sphalerite and pyrite， the inhibition mechanism of HS-1 was studied based on the flotation test results of pure minerals. The results showed that: ① When the pH value of pulp is 10， the combination of ethylthio-nitrogen and ammonium butanyl (molar ratio of 2∶1) as collector and HS-1 as inhibitor can effectively inhibit pyrite and partially inhibit sphalerite， while the flotation behavior of galena has little effect. ② The inhibitor HS-1 has little effect on the adsorption of collector on galena surface， and reduces the adsorption amount of ethylthio-nitrogen and ammonium butadiene black drug on sphalerite surface， and effectively inhibits the adsorption amount of combined collector on pyrite surface. ③ When the pH is of 10， HS-1 and composite collector successively react with three kinds of pure mineral， the surface of the minerals occurred the HS-1 infrared characteristic absorption peak， and the characteristic absorption peaks of the collector in the surface of galena has no obvious change， the collector absorption characteristic peaks in the surface of sphalerite and pyrite disappear， illustrating the HS-1 effectively inhibiton of the adsorption of collector on pyrite， and a certain inhibitory effect on sphalerite.