Jiangxi Dean Fluorite Mine Concentrator
The plant was designed in 1978 and has a scale of 250t/d.
I. Ore properties: The raw ore processed by the plant is a hydrothermal metasomatism and a hydrothermal filling carbonate-silicate type fluorite deposit. The fluorite grains in the hydrothermal metamorphic fluorite are fine, purple, light purple, colorless octahedron and rhombohedral dodecahedral polymorphic crystal, and the gangue mineral or surrounding rock is mainly composed of strips. The structure of the disseminated is auxiliary, the CaF2 content of this ore is generally below 65%; the hydrothermal filled fluorite is mainly produced in the fracture zone and the broken siliconized surrounding rock, which is pure fluorite vein, quartz fluorite vein and calcite. It is produced in several forms such as carbonate rock fluorite veins. Its fluorite particles are coarse, and the color is light green, light yellow green, pink, colorless and mixed with the above colors. The color is extremely bright, octagonal polycrystalline, semi-self-crystal. The crystal can be up to a dozen centimeters, and it is more common with purple octahedral polycrystals. Ore fluorite, quartz, calcite, a small amount of local sulphides. The structure is strip-shaped, disseminated, massive, scalloped, breccia, reticular, and the like. The fluorite single mineral contains CaF2 of 98.44% to 99.98%, and the average grade of ore CaF2 is 38.3%. Separated under the condition of heavy liquid (density 2.9), the single crystal of 5~1mm grain size reached 92.65%-97.99%, and the content of concentrate grade CaF2 was 97.02%~97.12%. The multi-element analysis and particle size analysis of the ore are shown in Tables 1 and 2. Table 1 Multi-element analysis table of raw ore
| Element | CaF 2 | SiO 2 | Al 2 O 3 | Ca | Fe | S |
| content,% | 39.48 | 36.74 | 3.79 | 21.41 | 2.69 | <0.02 |
| Element | P | Zn | Pb | Cu | TR 2 O 3 | Y 2 O 3 |
| content,% | 0.015 | 0.015 | <0.005 | 0.02 | 0.0458 | <0.006 |
Table 2 Raw ore particle size analysis table
| Level (mm) | Yield(%) | Grade (CaF 2 %) | Metal distribution rate (%) | Monomer dissociation (%) |
| -50~25 | 38.82 | 35.39 | 31.40 | 6.24 |
| 25~10 | 14.65 | 42.27 | 16.06 | 47.62 |
| 10~5 | 8.26 | 63.51 | 18.61 | 86.65 |
| 5~3 | 7.14 | 72.56 | 13.44 | 92.65 |
| 3~1 | 4.96 | 73.24 | 9.42 | 97.89 |
| 1 to 0.5 | 3.86 | 64.17 | 6.42 | 98.99 |
| 0.5 to 0.2 | 3.34 | 57.95 | 5.02 | 99.61 |
| 0.2 to 0.074 | 2.65 | 45.00 | 3.09 | 99.78 |
| -0.074 | 21.32 | 3.44 | 1.90 | 99.91 |
| Total | 100.0 |
Second, the beneficiation process: the ore (or waste rock heap ore) with a cylinder washing and grading sieve for washing classification, divided into four levels of 50 ~ 25mm, 25 ~ 10mm, 10 ~ 3mm and 3 ~ 0mm. 50~25mm grain size is selected by hand to obtain coarse grain concentrate, 25~10mm, 10~3mm two grades are respectively sorted by jig, and the coarse concentrate and hand-selected coarse grain concentrate are combined and sold directly; 3~ The 0mm grain size is combined with the hand-selected and jigging tailings after sedimentation and de-sludge, and enters the grinding classification. The grading overflow is once rough-selected, once-sweeped, and after six selections, the final concentrate is obtained, and the tailings are sent. The tailings dam is stored. Its ore dressing characteristics are that the original ore is ground once, and the high-quality fluorite concentrate can be obtained with a content of -0.074mm of 60%. The process flow is shown in Figure 1. The mineral processing technology indicators are shown in Table 3. The unit consumption indicators are shown in Table 4. The main equipment is shown in Table 5.
Figure 1 Process flow chart of Dean fluorite ore dressing plant Table 3 Process index table (1984)
| Time month | Concentrate grade, % | Job recovery rate % | ||
| CaF 2 | SiO 2 | CaCO 3 | ||
| 2 3 4 5 6 7 8 | 98.91 98.61 98.59 98.50 98.79 98.77 98.71 | 0.28 0.29 0.28 0.27 0.28 0.29 0.30 | 0.46 0.685 0.35 0.51 0.44 0.45 0.58 | 89.25 98.89 96.05 97.10 97.41 97.93 97.15 |
Table 4 Consumption index unit consumption indicator table (according to raw ore)
| name | Oleic acid | Sodium carbonate | Water glass |
| unit | Kg/t | Kg/t | Kg/t |
| Quantity | 0.75 | 0.6 | 0.6 |
Table 5 Main equipment table
| Serial number | Equipment name and specifications | unit | Quantity |
| 1 2 3 4 5 6 7 8 9 | Coarse grain jig cylinder washing and grading sieve ф1500×1500 wet lattice ball mill ф1000 single spiral classifier ф1000 mixing drum XJK-0.62 flotation machine TNZ-6 concentrator 10m 2 cylinder external filter vacuum filter ф1000×10000 Cylinder dryer | Taiwan, Taiwan and Taiwan station station groove Taiwan, Taiwan and Taiwan | 2 1 1 1 1 22 1 1 1 |
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