In response to the ecological environment problems caused by the storage of lead-zinc ore tailings, low alkali cement clinker was successfully prepared.The preparation method involved the use of lead-zinc ore tailings powder and coal-fired slag as silicon aluminum raw materials, combined with limestone and copper smelting slag. The preparation process involved four distribution ratios:limestone 75.20%, tailings powder 10.45%, coal-fired slag 12.55%, and copper smelting slag 1.80%. Practice has shown that this production process significantly optimizes the performance of clinker, reduce the liquid phase formation temperature by 8℃, decrease physical coal consumption by 4.0kg/t, achieves a 28 day compressive strength of 61.3MPa, and comply with the standard for stable SO2 emissions. From 2023 to 2024, a total of 23.8×104t of industrial waste will be consumed, reducing the tailings storage capacity by 6.2×104m3 cubic meters and saving 910 000 yuan in coal costs annually, resulting in significant economic benefits. At the same time, this technical solution enhances the combustibility through the mineralization of trace metal elements, effectively solving the problem of waste residue pollution.It achieves a synergistic effect of "waste discharge+waste utilization", and provides industrial demonstration for the green transformation of the cement industry.
