ABSTRACT

In this study, vegetable oils (sunflower and eucalyptus oil) and organic acids (citric and formic acid) were used for the super clean coal production. Sunflower oil as collector and eucalyptus oil as frother were used in flotation tests, and the coal fines ash was reduced from 29.67% to 6.10%. The clean coal was then leached with citric acid and formic acid at 65°C for 3 h and 2.92–2.98% ash super clean coal was produced. It was shown in this study that super clean coal can be produced with a completely organic process without grinding the coal fines. With this process, more than 90% of the mineral content of coal fines was removed. However, the use of high amounts of organic reagents in the SCC process is seen as a major handicap.

摘要

在这项研究中，植物油（向日葵和桉树油）和有机酸（柠檬和甲酸）被用于超洁净煤的生产。浮选试验采用葵花油作为捕收剂，桉树油作为起泡剂，煤粉灰分由29.67%降低到6.10%。然后将精煤用柠檬酸和甲酸在 65°C 下浸出 3 h，得到 2.92-2.98% 灰分的超精煤。本研究表明，无需研磨煤粉即可通过完全有机工艺生产超净煤。通过这个过程，煤粉中超过 90% 的矿物质被去除。然而，在 SCC 过程中使用大量有机试剂被视为主要障碍。