Modern Mining ›› 2024, Vol. 40 ›› Issue (02): 21-23.
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Anhui Development Mining Co., Ltd. has two sets of separation systems for specularite and
magnetite，and discharges 750 000 tons of iron tailings annually. As the Niupiling tailings pond is about to
be filled，the discharge of iron tailings has become an important factor restricting the sustainable develop⁃
ment of the mine. In order to solve this problem，the research and implementation of the productive cascade
utilization of the full resources of iron tailings in the company are expounded. ①213 000 t/a of 3-1 mm fine
sand was taken from the high-intensity magnetic pre-selection discarding tailings of closed-circuit rolling
products of high-pressure roller mill. 217 100 t/a of +0.34 mm coarse-grained sand was extracted from mag⁃
netite grinding selection tailings by graded dewatering. About 272 000 t/a of +0.3 mm coarse-grained sand is
extracted from the grinding selection tailings of specularite by graded dewatering. ②The filter pressing prod⁃
ucts based on reverse flotation tailings are sold as raw materials for cement iron correction. ③Integrate re⁃
sources with nearby mines，send part of the tailings slurry to the tailings-free filling mine for underground
filling，and the other part of the consolidated filter material is backfilled to the original proposed tailings res⁃
ervoir area for restoration and treatment of idle land environment. ④The tailings on site have the basic char⁃
acteristics of raw materials for traditional building materials. Through concentration，aging，drying，press⁃
ing，and high-temperature ceramicization，oily sludge permeable bricks，oily sludge parking space well⁃
shaped permeable bricks，building bricks，antique small green tiles，large wave tiles are produced. The full
resource utilization of on-site tailings was realized.
