A Dry Purification Process of Low-grade Clay Minerals
A technology for dry purification and clay minerals, which is applied in grain processing, chemical instruments and methods, solid separation, etc., can solve the problems of small increase in clay mineral content, limited purification effect, and large application limitations, so as to improve the dry process. Purification effect, reduction of use limitation, effect of improving grade and recovery rate
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Embodiment 1
[0046] The dry purification process of low-grade clay minerals in this embodiment, its process flow chart is shown in figure 2 , including the following steps:
[0047] 1) Crushing the low-grade illite raw ore (37% illite content, 52% sand content) to below 1cm to obtain a crushed product;
[0048] 2) The crushed product is subjected to flash grinding, the mill speed is 300r / min, the grinding time is 30s, and the grinding product is obtained, and the weight percentage of the minerals whose particle size is below 8mm is 83.4%;
[0049] 3) Sieve the grinding product through a 1mm sieve, directly discharge the coarse-grained product on the sieve, and obtain the under-sieve product below 1mm after sieving;
[0050] 4) Break up the under-sieve product below 1mm, the speed of the breaker is 1500r / min, and the breakup time is 10min to obtain the broken product with a particle size of D90=294μm;
[0051] 5) Classify the dispersed product, the speed of the classifier is 2000r / min, t...
Embodiment 2
[0053] The dry purification process of low-grade clay minerals in this embodiment, its process flow chart is shown in image 3 , including the following steps:
[0054] 1) Crushing low-grade kaolin raw ore (with an illite content of 35% and a sand content of 58%) to less than 1 cm to obtain a crushed product;
[0055] 2) The crushed product is subjected to flash grinding, the mill speed is 350r / min, the grinding time is 40s, and the grinding product is obtained, and the weight percentage of the minerals whose particle size is below 8mm is 85.1%;
[0056] 3) Sieve the grinding product through a 0.5mm sieve, directly discharge the coarse-grained product on the sieve, and obtain the under-sieve product below 0.5mm after sieving;
[0057] 4) Break up the under-sieve product below 0.5mm, the speed of the breaker is 1500r / min, and the breakup time is 10min to obtain the broken product with a particle size of D90=257μm;
[0058] 5) Classify the dispersed product, the speed of the c...
Embodiment 3
[0060] The dry purification process of low-grade clay minerals in this embodiment, its process flow chart is shown in Figure 4 , including the following steps:
[0061] 1) Crushing low-grade bentonite raw ore (bentonite content is 32%, sand content is 54%) to below 1cm to obtain a crushed product;
[0062] 2) The crushed product is subjected to flash grinding, the mill speed is 400r / min, the grinding time is 40s, and the grinding product is obtained, and the weight percentage of the minerals whose particle size is below 8mm is 88.3%;
[0063] 3) Sieve the grinding product through a 0.5mm sieve, directly discharge the coarse-grained product on the sieve, and obtain the under-sieve product below 0.5mm after sieving;
[0064] 4) Break up the under-sieve product below 0.5mm, the speed of the breaker is 2000r / min, and the breakup time is 15min, to obtain the broken product with a particle size of D90=203μm;
[0065] 5) Classify the dispersed product, the speed of the classifier ...
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