An example of iron lithium mica plant selection in a factory in Germany

40 years Germany has been producing iron ore lepidolite from a tungsten-tin ore with magnetic separation and flotation. The mine only recovered tungsten and tin minerals in the 1920s, while iron-lithium mica was abandoned as tailings. Due to the market demand, the iron-lithium mica concentrate was recovered from the accumulated tailings by magnetic separation method, and then the iron-lithium mica beneficiation workshop was built. In 1945, the plant with a scale of 600 tons/day was built, respectively, using magnetic separation and magnetic separation. The iron-lithium mica concentrate is produced by combining two processes of flotation, and the concentrate grade is 95%-97% iron-lithium mica, and the recovery rate is 50%-70%. There are two types of ore processed, as shown in Table 1, and the production process is shown in Figures 1 and 2.

Table 1 Mineral composition of two ores

Quartz type

Mineral name

quartz

Lithium mica

fluorite

topaz

锡石

Black tungsten ore

content,%

78

20

1.3

0.5

0.1

0.1

Yunying rock type

Mineral name

Yunyingyan, granite

Feldspar, porphyry

quartz

Iron lithium mica

Black tungsten ore

锡石

other

content,%

45

43

6

1

1

4

Figure 1 Old plant iron lithium mica beneficiation process

Figure 2 New plant iron lithium mica selection process

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