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(一)我国煤系硫铁矿资源概况 在我国,凡属海陆交替相煤田,如上二叠纪龙潭组、上石炭纪太原组等,煤系地层中均有丰富的硫铁矿资源;在早古生代石煤地层中也富含硫铁矿资源。上二叠纪龙潭组在湘、鄂、川、黔、等省比较发育。如四川省在龙潭组底部普遍赋存一层层位稳定、含硫品位中等、矿石易碎易选之硫铁矿,远景储量较大。湖南省根据现有资料初步统计,仅高硫煤中伴生储量就达两亿多吨。华北地区大部分煤田下部太原组、本溪组中伴生硫也很丰富,如山西省在石炭纪本溪组底部侵蚀面上赋存硫铁矿资源储量很大。晋东南沁水煤田太原组底部含三层硫铁矿,远景储量很可观。我国南方各省与石煤伴生的硫资源也相当丰富。
(A) Overview of China’s Coal-based Pyrite Resources In China, all coal-derived strata are rich in pyrite resources, such as the Longtan Formation in the Permian and the Taiyuan Formation in the Upper Carboniferous, Paleozoic coal-rich strata are also rich in pyrite resources. The Upper Permian Longtan Formation is relatively developed in Hunan, Hubei, Sichuan, Guizhou and other provinces. For example, the bottom of the Longtan Formation in Sichuan Province generally contains a layer of pyrite with stable horizon, moderate sulfur content and easy flotation of ore with a long-term reserve. Hunan Province, preliminary statistics based on available information, only high-sulfur coal associated reserves reached more than 200 million tons. Most sulfur in the Taiyuan and Benxi formations in most coalfields in North China are also abundant. For example, there is a great reserve of pyrite in the erosion surface at the bottom of the Carboniferous Benxi Formation. There are three layers of pyrite in the bottom of the Taiyuan Formation in Qinshui Coalfield in southeastern Shanxi, and the long-term reserves are very impressive. The sulfur resources associated with stone coal in the southern provinces of our country are also quite abundant.