Nowa ekologiczna metoda usuwania zanieczyszczeń skałą płonną z urobku węgla kamiennego

In recent years the philosophy of energy coal output enrichment has changed. It was noted that due to the already owned coal combustion installations the very clean coal concentrates are not being searched on the market. The studies have shown that even partial removal of gangue particles from the raw coal allows to obtain commercial products corresponding to the parameters of the warranty boilers in power plants, coal handling plants and heating plants. The separation of stone particles from the coal particles is called the deshaling process The existing methods for enrichment of the raw coal is carried out by using wet methods. The enrichment involves using heavy media, jig and flotation. The wet methods make the tiniest grain of excavated material to go to the node of the water - mud processing plant. Their management is expensive and sometimes very difficult technically. The wet methods of enrichment may be, in many cases replaced by the dry methods. In such case occurs the enrichment on air concentration tables with new construction. These tables have already been widely used in many countries. This is a Chinese design commonly tested – there are more than 1800 such installations already working. This paper describes the working principle of the air concentration table, its construction, factors influencing the process of separation of stone from coal. It also presents the benefits of technological, economic and environmental implementation of the dry separation method.