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巴西圣埃斯皮里图州CachoeirodeItapemilim石灰岩矿床的一个明显特点 ,就是它们具有很高的亮度值 (国际标准协会ISO标准的 99%以上 ) ,因而这种原料适合于在造纸工业中应用。然而成问题的是其中以硅酸盐矿物形式的不溶物含量很高 (可达到 10 % ) ,而用于造纸原料的不溶物的含量不应超过 1%。进行了一些研究 ,以确定能否通过浮选法使这种石灰岩中的硅酸盐矿物含量降到所需的数值。在使用Hoechst公司生产的FlotiganEDA -B作为捕收剂、胶凝淀粉作为抑制剂和甲基异丁基甲醇 (MIBC)作为起泡剂进行浮选时 ,石灰岩在槽内产品的分布率达到了 75 %和 85 %之间 ,不溶物含量降到 0 5 %以下
One of the distinguishing features of the Cachoeirode Itapemilim limestone deposit in the State of Espirito Santo, Brazil, is that they have high brightness values (more than 99% of the International Standards Institute ISO standard) and are therefore suitable for use in the paper industry. However, the problem is that the content of insoluble matter in the form of silicate minerals is very high (up to 10%), while the content of insolubles used in papermaking raw materials should not exceed 1%. A number of studies were conducted to determine if the silicate mineral content in this limestone could be reduced to the desired value by flotation. When FlotiganEDA-B from Hoechst was used as a collector and gelling starch as a flotation agent as a blowing agent and MIBC as a flotation agent, the limestone product distribution rate in the tank reached 75 % And 85%, the insoluble content dropped below 0 5%