Design of Tantalum-Mite Iron Ore Dressing Plant

Thailand and the United States tantalum and niobium ore beneficiation plant

Taimei Mine is located in Guangdong Province. A Department of weathered granite Medium ferroniobium DEPOSITS shell. Currently mining areas include Boluo 521 and Taimei 524, of which 521 is the main mining area. The ore contains Nb ₂ O ₅ 0.029%. The main metallic ore minerals are columbite, microlite, aeschynite, hafnium-rich zircon, thorite, xenotime, gangue mainly quartz, feldspar. Mineral grain crystals: coltan is generally less than 0.1 mm, and yttrium-rich zircon is generally less than 0.074 mm. The mine is the main production base for China's current raw materials.

The concentrator is divided into two parts, rough selection and selection. The rough selection uses a gravity-magnetic-heavy process (see Figure 1). The ore (water gun mining) is selected for screening, and parts larger than 0.5 mm do not contain ore. 0.5～0.3mm material is selected by shaker, less than 0.3mm material is concentrated by φ12m thickener, thickener overflow (-0.075mm) is discarded, concentrator sanding (0.3～0.074mm) is given to φ1.5m The ring wet magnetic separator has undergone one rough selection and one sweep, and the magnetic part is selected by a shaker. The obtained fine ore concentrate grade of coltan is 7% to 8% Nb ₂ O ₅ , and the recovery rate is 44.75%. The factory is further processed.

Figure 1 Taimei antimony ore roughing plant process

Featured

A re-election-magnetic selection-electrical selection-floating reselection combination process is used (Fig. 2). Columbite ore to crude screened, greater than 4 mm free of mineral waste material, through the material of less than 4 mm hydraulic classifier classifying boxes, respectively shaker material selected high levels of niobium concentrate tin, niobium concentrate, fine views Mine three products. The various products are sieved into two grades of +0.9 mm and -0.9 mm, and the tantalum ore concentrate is selected by a double or three-disc dry magnetic separator. In the magnetic selection mine, the halo is selected by floating re-election, the non-magnetic materials are sorted by a shaker, the shaker concentrate is returned to the classification box, and the zircon is selected by the mine in the shaker. Production index: NdFeite concentrate contains 60% Nb ₂ O ₅ , the recovery rate is 95% (42.51% for the original ore), and some zircon and monazite products are also recovered.

Figure 2 Taimei Yankuang Select Plant Process

Yutan Sand Tin-Yan Mine Concentrator

The 坂 ç ‚ ç ‚ 锡 钽铌 - 钽铌 mine is located in the territory of Guangdong Province. It is a river-like tin and antimony polymetallic deposit. Cassiterite ore containing 479 g / m ^3, columbite 34 g / m ^3, 69.8 g of titanium columbite / m ^3, monazite 34 g / m ^3, ilmenite 839 g / m ^3, xenotime 18.3 g / m ³ , crystal spar 11.3 g / m ³ . The gangue is mainly composed of quartz, feldspar and topaz . Mineral grains: cassiterite is 0.92 mm at the maximum, generally 0.5-0.02 mm, and strontium minerals are at most 0.4 mm, generally 0.2-0.01 mm.

The entire process of the ore dressing is divided into two parts. The rough selection uses a jigging-combined abduction chute-shaker combination process (Fig. 3). The ore (water gun mining) is given to a 6 mm cylindrical sieve. The material larger than 6 mm does not contain ore. The material less than 6 mm is hydraulically graded, and the 6-0.25 mm grade is fed into the Guangdong A-type jig. The jig concentrate is given. Selected into the Guangdong C-type jig. The -0.25 mm grain size is passed through a φ500 mm cyclone, and the underflow of the cyclone is sorted by a combined pinch chute. The slime concentrate was first removed with a φ125 mm cyclone to remove 0.051 mm of fine mud, and then hydraulically graded. The materials at each level were separately selected by shaker. The obtained tin-yttrium concentrate contains Sn 1.433%, (NbTa) ₂ O ₅ 0.38%, and is sent to the selection plant for further processing.

Figure 3 The process of roughing the sand and tin mine

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A combined process of reselection-magnetic separation-electrical selection-floating reselection (Fig. 4). The tin-yellow concentrate is first passed through a 3 mm vibrating screen: more than 3 mm of material does not contain ore, and less than 3 mm of material is fed into the classifier. The graded bucket sand is selected by a jig-shaker; the graded bucket overflow is hydraulically graded and then selected by a shaker. According to the difference of mineral composition, density, relative magnetization coefficient and relative conductivity, the jigging and shaker concentrates first select magnetite by magnetic separator, and the non-magnetic part is sieved (divided into +0.25 mm, 0.25~). 0.18 mm, -0.18 mm three-level), respectively, into the electric sorter. The conductor material is fed into the magnetic separator, and three products of ilmenite, coltan and strontium ore are selected by different magnetic field strengths. The non-conductor materials are sorted by shaker, the shaker concentrate and the middle mine are respectively fed into the magnetic separator, and the magnetic materials are sorted by re-election-magnetic separation-electrical selection to separate monazite, xenotime and zircon. Three products.

Figure 4 坂潭沙锡-钽铌矿

Production index: tin concentrate contains Sn11.23%, recovery rate is 49.02% (for raw ore), tantalum ore concentrate contains (NbTa) ₂ O ₅ 57%, ferrotitanium ore contains (NbTa) ₂ O ₅ 27% It also recovered four products of ilmenite, monazite, xenotime and zircon.

Greenbush tin company smelter

Greenbushes Tin is Australia's largest producer of antimony concentrates. The treated ore is a decomposed clay pegmatite composed of weathered quartz, mica , feldspar and a large number of tourmaline . Cassiterite ore containing 250 g / m ^3, tantalite 60 g / m ^3, composed of three mineral processing portion of the main clay treatment plants, and the roughing mill roughing mill.

Main clay treatment plant

Using the jigging process (Fig. 5), the ore is passed through a 100×225 mm drum screen, and the material on the screen is crushed to -300 mm with a slag hammer. The material under the sieve is fed into a 10 mm drum screen, and the part is less than 10 mm. The feed bin of the jig is pumped to the φ450 mm cyclone, and the bottom of the cyclone is treated with a jig. The part larger than 10 mm is sent to the 300 mm sieve through the main drum screen, and the hard rock is more than 300 mm. The less than 300 mm material is washed and sieved, the material on the sieve (>10 mm) is discarded, and the material is sieved (<10 mm). The φ450 mm cyclone is pumped into the cyclone, and the cyclone is sanded into the jig. After a rough selection, one selection is made to obtain two grades of high-grade and low-grade coarse concentrate. High-grade coarse concentrate contains 30%-40% tin, coltan iron ore 5%~10%; low grade coarse concentrate contains 5%-10% cassiterite, and coltan is 2%~5%, respectively sent to rough selection plant Choose one step.

Figure 5 Green Bushis tin company clay treatment process

Rough plant

Using the re-election-magnetic separation process (Fig. 6), the high-grade coarse concentrate is first fed into a 10 mm drum screen, the material on the sieve is free of ore, and the material under the sieve is fed into the Labid roller wet magnetic separator through the distributor. The iron mineral (including magnetite) is selected, the non-magnetic part is fed into the 1.4 mm drum screen, and the material larger than 1.4 mm is fed into the mine bin, and the cyclone bottom stream is fed into the scrubbing machine (NaOH) solution through the φ150 mm cyclone. scrubbing at maximum pulp density, unwashed concentrate via vacuum φ150 mm and a conical swirler to return into a coal dryer designed as a fuel gas, dried feed concentrate further selection processing plant.

Figure 6 Greenbush tin company roughing plant process

The low-grade coarse concentrate has a much finer grain size than the high-grade coarse concentrate. Like the high-grade system, it passes through a 10 mm drum screen, a drum type magnetic separator and a roll machine. The material of less than 10 mm is fed to the distributor. The three grades of the three-compartment hydraulic grader (without scrubbing machine) are divided into four grades, which are selected by Wilhelm-type shaker, and the shaker concentrate is merged into the high-grade system at the scrubber. Return, tailings storage.

Select factory

Mining and wind shaker - magnetic separation - electrification combination process (Figure 7). The coarse concentrate was firstly graded by dry grading using two four-layer Kason sieves with screen sizes of 0.8, 0.4, 0.2, 0.18, 0.16, 0.14, 0.12 mm and sieved into eight grades. More than 0.8 mm material, about 20% of the total weight, fed into the Kip Kelly wind shaker, the shaker concentrate is directly fed into the Lapid three-plate magnetic separator, and the ilmenite is selected in the first plate, the second plate In the third set, the bismuth iron ore was selected. The coltan product contains: Ta ₂ O ₅ 42%, Nb ₂ O ₅ 28%, Sn 3% to 5%, and Sb 0.5% to 1%.

Figure 7 Greenbush tin company selection process

0.8 to 0.4 mm of material is fed into the Kip Kelly Wind Shaker to remove silica , tourmaline, ilmenite and zircon. The shaker tailings is returned to the selection plant for treatment. The shaker concentrate is fed into the high-pressure roller type electric separator. The voltage is 18 kV, which is divided into two parts: non-conductor and conductor. The non-conductor part contains antimony ore, zircon and strontium . The ore and cassiterite are stored for reprocessing. The conductor part was selected from ilmenite and coltan concentrate by a Lapid magnetic separator. The non-magnetically selected product is then separated from the cassiterite concentrate by an induction roll magnetic separator.

The fine-grained material of less than 0.35 mm is separately sent to an Ordovician wind shaker for sorting, and then subjected to a high-pressure roller type electric separator, followed by selection of commercial cassiterite concentrate and crucible by a Lapid disk magnetic separator. The antimony product, the tailings are returned or stored for further processing.