Jiang Xi Dean fluorite ore beneficiation plant
The plant in 1978 and designed by the Nanchang Nonferrous Metallurgy Design and Research Institute, the scale of 250t / d.
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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 CaF 2 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 Carbonate rock fluorite veins such as calcite are produced in several forms. 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.
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The ore is composed of fluorite, quartz, calcite, and a small amount of metal sulfide. The structure is strip-shaped, disseminated, massive, scalloped, breccia, reticular, and the like.
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The fluorite single mineral contains CaF 2 of 98.44% to 99.98%, and the average grade of ore CaF 2 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 CaF 2 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 indicator 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 jig Cylinder washing and grading sieve 15001500×1500 wet lattice ball mill 10001000 single spiral classifier 10001000 mixing bucket XJK-0.62 flotation machine TNZ-6 thickener 10m 2 cylinder external filter vacuum filter 10001000×10000 cylinder dryer | station station station station station groove station station station | 2 1 1 1 1 twenty two 1 1 1 |
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