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1980—1982年在《爱沙尼亚磷块岩》生产联合企业的选矿厂里进行了强化马尔都磷块岩选矿工艺的试验,从此该企业转向了含P_2O_528%以上一级磷块岩粉的生产。强化作业是用园筒筛先从破碎的矿石(粒度为-20毫米)中分出-5+1毫米的部分,然后在浮腾层浮选机中,用阳离子捕收剂从不再细磨(-1毫米)的部分中浮选出石英。含P_2O_524—26%的-5+1毫米部分,不再进行选别,可作为最终入炉精矿。用АНП—2和进口的лилафлот的混合物,作为阳离子捕收剂,其用量分别为500和40—50克/吨原矿。1980年,强化工艺以前,一级
In 1980-1982, a trial was conducted in the concentrator of the “Estonian Phosphorite Production Complex” to intensify the beneficiation process of the Mardu-Phosphorite rock. From then on, the company turned to the production of more than 528% P-1 rock powder containing P2O5. Reinforcement is the first step with a cylindrical sieve from the broken ore (particle size -20 mm) in the -5 + 1 mm of the part, and then in the floating layer flotation machine, the cation collector is no longer fine grinding (-1 mm) of the part of the flotation of quartz. With P_2O_524-26% -5 + 1 mm part, no longer sorting, can be used as the final into the furnace concentrate. A mixture of АНП-2 and imported лилафлот was used as a cation collector in quantities of 500 and 40-50 g / t ore, respectively. In 1980, prior to strengthening the process, a