Design of brown ore and black gold ore dressing plant

Lisong yttrium niobium ore beneficiation plant brown

The Lisong Brown Mine is located in the northeast 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

Lohmann Mine Ore Dressing Plant

The Lowman concentrator is located in the Bear Valley area of ​​Idaho, USA. The main antimony minerals in the ore are black gold ore and coltan. Symbiotic metal minerals include monazite, magnetite, and ilmenite. The rough selection is carried out on a sand mining vessel, which is sorted by jigging and shaker. Heavy sand-containing selected euxenite 610 g / m ^3, columbite 122 g / m ^3, monazite 310 g / m ^3, further comprising fergusonite ore, xenotime, zircon and the like. Among them, magnetite, ilmenite and garnet account for 85%. Send it to the Lohmann Select Plant for further processing.

The selected plant scale is 150-200 tons/day, and the combination flow chart 3 is selected by magnetic separation-electrical selection-wind shaker-shaker reselection. According to the mineral composition, density and relative magnetization coefficient of heavy sand, magnetite (ilmenite → ilmenite → garnet → coltan → black gold ore → monazite → spinel → zircon), and relative conductivity In order to increase the difference (silicate → phosphate → carbonate → oxidized ore → sulfide ore), the heavy sand is first fed into the 1.2 × 2.4 m electric vibrating screen, and the material on the sieve (+1.6 mm) is fed into 0.6 × 1.2 m rod mill, grinding particle size -1.6 mm, and the electric vibrating screen constitutes a closed circuit. The undersize material (-1.6 mm) was graded by a 0.6×4.6 m Dow classifier, overflowed and discarded, and the underflow (containing 75% solids) was scrubbed with vigorous stirring and then fed to a magnetic separator to select magnetite. After the non-magnetic product is sent to the dryer for drying, it is fed into a Kung Kate cylindrical magnetic separator to select magnetite-ilmenite. The non-magnetic portion was selected from ilmenite-garnet by an induction roll magnetic separator. Magnetic separation tailings (including coltan, black gold ore, monazite, etc.) are preheated to 350 ° C for the "Capco HT46" corona electrostatic concentrator for sorting. The conductor part (the coltan or black gold ore) is divided into two stages by a 0.8 m electro-vibration screen, and is sent to a belt-type magnetic separator to select residual ilmenite and garnet. The non-magnetic product is selected from the coltan-black gold concentrate by a wind shaker and a wet shaker. It has been proved by the fact that the sorting efficiency of the belt type magnetic separator is more reliable than that of the induction roller type magnetic separator, but the production capacity is small and it is not suitable for rough selection. The non-conductor part (monazed stone, etc.) is separated by two magnetic separations to produce garnet, zircon-quartz, monazite and the like. Total concentrate grade: Nb ₂ O ₅ 20%~25%, Ta ₂ O ₅ 2%～5%, U ₃ O ₈ 6%～10%, ThO ₂ 1%, TR ₂ O ₃ 18%～22%, It is sent to the St. Louis plant for chemical treatment, extracting strontium and barium, and also recovering compounds of uranium , thorium and rare earth elements.

Figure 3 Luoman concentrator process