Improvement of Taiping Molybdenum Process

The process test reveals that the quality of concentrate products is not up to the ministerial standards for the following reasons: the low degree of dissociation of coarse concentrates (Table 3) is insufficiently selected, and the rough selection flotation time is short. Three shifts are unstable.

Practice has shown that even with the addition of a sufficient amount of water glass and potassium cyanide, it is difficult to obtain 45% molybdenum concentrate after five selections. The results of sieve analysis and chemical analysis of molybdenum concentrate are shown in Table 4.

The data in the table indicates that the coarse-grained metal content above +200 mesh accounts for about 1/2, and the monomer dissociation degree is about 60%. The main reason for this partial grade is that the gangue minerals such as molybdenite and quartz are not sufficiently single. Disintegration, the only feasible way to improve the quality of this part is to re-grind. -200 mesh size monomer is very high, theoretically, molybdenum concentrate containing Mo50% can be selected, but the grade is not high, mainly because the selection times are too small and the flotation tank is too large.
Laboratory tests have shown that the concentrate can be concentrated and then ground to obtain a 51% Mo-containing ore (Table 5).

Experiments have confirmed that for Taiping molybdenum ore, it is considered to obtain greater economic benefits. After re-grinding and eight selections, it is advisable to produce molybdenum concentrate containing 51% Mo.
3. Process Reform From March to April 1983, on the basis of adequate preparation, the following reforms were made to the original design process:
(1) Adding a sweeping election to the rough selection section;
(2) Adding a concentrated concentrate dehydration and decontamination process;
(3) The coarse concentrate is reground in a ф900×1800 mm ball mill (closed with a ф 125 mm hydrocyclone);
(4) Change the three-choice selected assignments into one class of concentrated selection operations:
(5) Add four selections in the 1A flotation machine;
(6) Select direct tailing.
The reformed process is shown below. [next]

The reformed process is clearly superior to the original design process. The recovery rate is increased by about 5%, the grade of molybdenum concentrate is increased by 8 to 10%, and the quality of molybdenum concentrate of one quarter of the class is up to the special grade standard (see Table 6.)

The economic benefits are also very obvious. At the current level, the annual net income is about 150,000 yuan.

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