ABSTRACT

Oil shale must have a large quantity of kerogen to be of economic benefit, but oil shale with about 30% kerogen is a low-quality ore. Thus, the column flotation technique has been utilized to increase its quality, and the results were analyzed by a reduced two-level factorial design to optimize the interaction effects of seven parameters by response surface modeling. The perturbation plots were used to identify the optimum conditions leading to a predicted maximum kerogen concentration of 53.2% and kerogen recovery of about 81% at estimated optimum conditions of 15% solid concentration, 0.36 cm/s superficial wash water flow rate, 0.28 cm/s superficial feed flow rate, 10 ppm frother concentration, 10 cm froth depth, 1.5 cm/s superficial air flow rate, and 1.5 kg/t pine oil collector dosage. Whereas, the validation experiments under these optimum values gave similar kerogen concentration and recovery of about 52.9–53.6% and 80–82%, respectively.

摘要

油页岩必须有大量的干酪根才能产生经济效益，但干酪根含量在 30% 左右的油页岩属于劣质矿石。因此，柱浮选技术已被用于提高其质量，并通过简化的两水平因子设计分析结果，以通过响应面建模优化七个参数的交互作用。扰动图用于确定最佳条件，在 15% 固体浓度、0.36 cm/s 表面洗涤水流速、0.28 cm/s s 表面进料流速、10 ppm 起泡剂浓度、10 cm 泡沫深度、1.5 cm/s 表面空气流速和 1.5 kg/t 松油收集剂用量。然而，