论文部分内容阅读
直接浮选法提高磷矿石品位,特别是对硅质物含量较高的磷矿是毫不逊色的。但是,对钙质或硅钙质磷矿,往往难以使钙,镁杂质降到磷酸工艺要求的水平,药耗也较大。煅烧消化脱灰法富集磷矿,由于设备简单、经济,精矿有利于酸分解,是六十年代发展起来的一种热化学——物理选矿法。六十年代中期,在美国、摩洛哥、阿尔及利亚、以色列等已有不同规模的生产实践。其流程尽管不同,但不外是以煅烧消化为基础,同水洗,风选,分级机或水力旋流器脱泥等作业的组合。至今,用这类方法富集磷矿的研究和生产已有较多的报道,但绝大多
Direct flotation method to improve the quality of phosphate rock, especially for the high content of silica rock phosphate is no less. However, it is often difficult to reduce calcium and magnesium impurities to the level required by the phosphoric acid process for calcium or sillimanite, and the drug consumption is also large. Calcined digestion and ash removal enrichment of phosphate rock, due to the simple and economical equipment, concentrate is conducive to acid decomposition, is developed in the sixties a thermochemical - physical beneficiation method. In the mid-1960s, production practices of various sizes in the United States, Morocco, Algeria, Israel and the like had existed. Although the process is different, but it is based on calcination and digestion, with washing, wind election, grading machine or hydrocyclone mud removal and other operations portfolio. Up to now, there have been many reports about the research and production of enriching phosphate rock by such methods, but the vast majority