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在传统石灰中和处理法的基础上，提出了酸法难浸废水用“石灰石-石灰两步中和-沉渣循环”的流程进行处理。废水先与廉价的石灰石接触反应，使废水中的强酸中和并使铁、铝等金属离子在较低pH值下形成氢氧化物，再用石灰乳进一步中和到要求的pH。生成的沉淀物（沉渣）在过程中不断循环。该方法与一次石灰中和法相比，试剂费用节省1／3，沉渣生成量（以体积计）减少2／3，并且沉渣的过滤和沉降性能也有所改善。本工作还对沉渣减容与改性的机理进行了研究探讨。
Based on the traditional lime neutralization method, the acid leaching wastewater was proposed to be treated by “limestone - lime two - stage neutralization - sediment cycle”. Wastewater is first contacted with cheap limestone to neutralize the strong acids in the wastewater and to form metal hydroxides such as iron and aluminum at lower pH and then further neutralized to the desired pH with lime milk. The resulting sediment (sediment) circulates continuously throughout the process. Compared with the first lime neutralization method, the method saves 1/3 reagent cost, reduces the sediment production volume (by volume) by 2/3, and improves the filtration and sedimentation performance of the sediment. The work also studied the mechanism of sediment volume reduction and modification.