尾矿作水泥矿化剂和铁质原料的试验研究

Experimental study on utilization of metallic tailings as cement mineralizer and iron raw material

为开发利用大量堆弃危害环境的金属尾矿固体废弃物，根据其富含多种微量元素，（Fe2O3质量分数较高），且熔点较低的特点，将其作为矿化剂和铁质原料生产水泥开展试验研究．用铜尾矿按质量比为5％的掺量配制水泥生料，在实验室高温炉不同温度条件下进行水泥熟料煅烧试验．对熟料样品的f-CaO、化学成分和X衍射矿物成分分析表明，在1300℃煅烧温度下，f-CaO质量分数低于1％，C3S质量分数达56．79％，熟料矿物组成与不加尾矿的传统配料水泥熟料基本相同，而烧成温度比传统配料降低了100～150℃．金属尾矿用作水泥矿化剂和铁质原料烧制水泥熟料，能降低水泥熟料烧成能耗，减少水泥生产成本，提高熟料产量和质量，实现尾矿的资源综合利用，并能有效地保护环境．

The wasted metallic tailings contain relatively high amount of ferric oxide and some trace elements and have the characteristic of low melting point so the utilization of metallic railings in the cement production was investigated. Calcination experiments in a high temperature furnace under different temperature were carried out using the raw meals with 5% copper railings. Then the free-CaO, chemical composition and XRD mineral component in the cement clinkers were analyzed. The results revealed that the freeCaO content in the clinker was lower than 1% and the C3S content of the clinker was 56.79% at 1300℃. The mineral component of clinker with copper railings added is similar to that of traditional clinker without copper railings. However the calcinations temperature of cement clinker could decrease 100- 150℃ after adding copper railings. The clinker production with copper railings as cement mineralizer and iron raw material will reduce the energy consumption and production cost and increase the output and quality of clinker during the clinker calcinations.