屯兰矿8^#、9^#原煤配煤洗选方案分析

Analysis of the schemes for washing blended 8^# and 9^# raw coal at Tunlan Coal Preparation Plant

为合理利用屯兰矿肥煤和瘦煤资源,在4种不同的原煤煤质条件下,对配煤洗选和单洗配装两种配煤方案的配煤效果进行了分析。结果表明,两原煤基元灰分差值的大小直接影响配煤方案的选择:基元灰分差值越大,配煤洗选优势越为明显,其精煤产率高于单洗配装;当基元灰分差值大致相同时,单洗配装更具优势,其精煤产率高于配煤洗选。

The raw coal treated by Tunlan Plant has four different properties. For rational utilization of the Tunlan Mine′s fat and lean coal resources, analysis is made of the effects of two alterative washing schemes: one is to wash the raw coal in a blended manner and the other is washing each kind of raw coal separately and then have the washed products blended. Result of analysis shows that: the selection of the scheme is directly governed by the difference of the different raw coal in elementary ash;the larger the difference, the more pronounced is the advantage of the former scheme and a much higher yield of clean coal can be obtained compared with the latter scheme;and with the raw coal having approximately the same elementary ash, the latter scheme can be preferably selected because of the higher yield of clean coal.