废轮胎热裂解炭黑浮选降灰

    Flotation of Pyrolysis Carbon Black from Waste Tires

    • 摘要: 这是一篇矿物加工工程领域的论文。本文通过浮选法对废轮胎热裂解炭黑进行了降灰提纯研究,探究了不同操作因素对炭黑浮选提质的影响规律,并借助形貌和物相表征技术对不同浮选产物的性质进行了分析。结果表明,当矿浆浓度为20 g/L、捕收剂用量为500 g/t、起泡剂用量为1500 g/t、刮泡时间9 min和充气量为0.25 m3/h时,炭黑浮物产率为62.32%,灰分为17.29%,沉物产率为37.68%,灰分为23.32%,石英脱除率为75.49%,碳酸钙脱除率为66.23%,石英、方解石等矿物质得到了有效的去除,其中充气量对实验影响较为显著。研究表明浮选法可对废轮胎热裂解炭黑进行降灰,可作为热裂解炭黑降灰提纯的有效预处理方法。

       

      Abstract: This is an essay in the field of mineral processing engineering. The flotation method is applied to reduce ash content and purify pyrolysis carbon black from waste tires in this study. The effect of different operating factors on carbon black flotation was explored, and the phase and morphology of different flotation products were measured by various characterization methods. Results show that 62.32% yield of clean carbon black and 17.29% ash content for flotation concentrate were obtained, and 37.68% yield of flotation tailing and 23.32% ash content were obtained as well under the optimal flotation conditions were of 20 g/L of concentration, 500 g/t of collector, 1500 g/t of foaming agent, 9 min of froth skimming time and 0.25 m3/h of aeration amount, and the removal rate of quartz is 75.49% and the removal rate of calcium carbonate is 66.23%. Minerals including quartz and calcite were effectively removed by flotation, The amount of aeration had more significant impact on the test. This study indicates that flotation can be well used for reducing ash content of pyrolysis carbon black from waste tires which is proved to be an effective ash reduction pretreatment method.

       

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