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Lisong fergusonite mine located north of He County, Guangxi Province. The system consists of a brown castor granite weathering crust deposit and an alluvial sand deposit. According to the degree of weathering, weathering crust deposits can be divided into slope layer, fully weathered layer, semi-weathered layer and micro-differentiated layer from top to bottom. There are many ore points and scattered. The mined areas have returned to the face and the upper emperor, of which the main face is the main mining area. Ore industrially valuable minerals are mainly brown yttrium niobium ore symbiotic metal minerals monazite, zircon, titanium iron ore. The gangue minerals are mainly quartz and feldspar . Useful mineral grain crystals are generally between 0.45 and 0.08 mm. The ore contains Nb 2 O 5 0.01% to 0.013%, ZrO 2 0.024%, ThO 2 0.0086%, and ΣER 2 O 3 0.075%. The endowment accounted for 38.96% of the brown peony ore, 51.8% dispersed in the biotite , and 7.58% of the quartz. The mine is one of the major strontium resources in China. It was built in 1958, built in 1959, and put into production in 1960. It is the first production mine in China. The beneficiation process consists of two parts: a roughing plant and a selection plant.
Rough selection
The back-faced roughing plant uses a jigging-shaker process (Fig. 1). The ore (water gun mining) is first classified by water sifting and vibrating screen, and the material under the sieve (-2 mm) is sent to the first section of the trapezoidal jig for rough selection, and the jigging concentrate is selected by a shaker. The jigging and shaker tailings are graded by a spiral classifier, larger than 0.4 mm, and then combined into the second trapezoidal jig sorting. The jigging concentrate is selected by a shaker, and the shaker concentrate is fed into the weak magnetic field. The iron mineral is selected by the machine, and the non-magnetic product is the brown ore coarse concentrate, which is sent to the selection plant for further processing.
Fig.1 The process of roughing the roughing plant of Lisong brown trout
Select factory
A magnetic separation-reselection-floating recombination process is used (Fig. 2). The coarse concentrate is first dried and then fed into a single-disc magnetic separator to select iron filings. The non-magnetic part is sent to the three-disc magnetic separator. The magnetic properties of various minerals are used to strictly control the operating parameters. The minerals are divided into: ilmenite-brown ore group; brown ore-monist group; monazite - Four materials of brown gangue group and zircon group. The first three groups of materials are first pickled, then shaken-magnetically selected or magnetically selected. The selected magnetic material is halophilized with oleic acid, sodium carbonate and sodium silicate. The product in the tank is brown glutinous rice. mine. The latter group of materials were selected from brown enamel and zircon concentrate by a shaker-magnetic separation-shaker. General mineral processing index: brown trout concentrate grade (Nb 2 O 5 ) 35.72%, selected recovery rate 87.62%; monazite concentrate grade (TR 2 O 3 +ThO 2 ) 65.23%; zircon concentrate grade (ZrO 2 ) 60.48%, and also recovered ilmenite.
Figure 2 Lisong Brown Ore Mine Selection Plant Process