1981年我矿新建年产80万吨石灰石厂投产,原设计露天开采、峒室破碎、仓顶筛分的干法生产。投产后由于原矿含泥量高、粉尘大而增设了一套尾矿处理装置。从1984年至今已回收尾矿渣3.7万吨,增利14.8万元。岗位粉尘也由50～158毫克/米~3降至0～4毫克/米~3,极大地改善了劳动条件,同时矿石质量也有所提高。 In 1981 I mine new annual output of 800000 tons of limestone plant put into operation, the original design of opencast mining, crushing chamber, top screening dry production. After put into production due to the high ore content of mud, dust and the addition of a set of tailings treatment plant. Since 1984, it has recovered 37,000 tons of tailing slag and increased profit by 148,000 yuan. Dust also from 50 to 158 mg / m ~ 3 to 0 ~ 4 mg / m ~ 3, greatly improving the working conditions, while the quality of ore has also been increased.