Application of the Tianyuan intelligent dry separator at Pingtian refuse heap of Shanjiaoshu Coal Mine

In order to strengthen harness of refuse heap, realize recovery and utilization of coal resource, effectively eliminate the second hazard induced by stockpiling of refuse, and recover from the heap the <50 mm coal with a calorific value up to the requirement of power plants, the Tianyuan intelligent dry separator is used by Shanjiaoshu Mine to carry out recovery and separation of the valuable coal. An introduction is made in the paper to the structure, working principle, process layout of the separator as well as its performance in industrial application. Field application shows the use of the separator can lead to effective separation of the 50~10 mm coal, and when the moisture of the feed of the separator is below 10%, the clean product can gain a noticeable increase in calorific value; after removal of the <10 mm particles, the loss of coal in refuse can be drastically reduced by 6.03 percentage points. The separator can operate in two modes, i.e. the low enrichment mode and the high enrichment mode. In the former operation mode, the middlings, intergrown coal and bones can be recovered to gain a higher yield of product while in the latter mode, the intergrown coal and bones are discarded for improvement of quality of separated products which can all have a calorific value of >12.56 MJ/Kg, with an increase being up to 259.25%. the separator can produce the product. With quality indicators as required by users, and its use can lead to reduction of operating costs and improvement of economic performance.