由中国矿业学院研制的GS1000×2000型煤用概率分级筛于1982年3月完成了工业性试验,并于7月进行了技术鉴定。经过半年多生产实践证明,该设备性能和筛分效果良好,最终产品质量合格,已成功地完成了对50～0mm粒级原煤的干法分级为50～13mm混中块、13～6mm粒煤、6～0mm粉煤三种产品。 Developed by China Institute of Mining GS1000 × 2000 coal with probability grading sieve in March 1982 completed an industrial test, and in July conducted a technical appraisal. After more than half a year of production practice has proved that the performance of the device and the screening effect is good, the final product quality standards, has successfully completed the 50 ~ 0mm granular raw coal dry classification of 50 ~ 13mm mixed block, 13 ~ 6mm coal , 6 ~ 0mm pulverized coal three products.