Method for dehydrating micro-particle slurry
A technology of fine particles and slurry, applied in separation methods, chemical instruments and methods, filtration separation, etc., can solve problems such as poor filtration performance
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[0023] Example 1
[0024] A bauxite concentrate with a concentration of 10% is classified by an inclined plate thickening box with a stirring device. +10μm coarse particle concentrate with a content of 82% is increased to 65% by a high-efficiency thickener, and then filtered and dehydrated by a ceramic filter. 300mm, the pulp temperature is 22℃, and the filtration capacity is changed from the original 210kg / m 2 ·h increased to 442kg / m 2 ·h, cake moisture 11.2%. -10μm fine particle concentrate with a content of 86% is settled and concentrated by a high-efficiency thickener under the condition of pH=5.6, and the concentration is increased to 44%. After the concentration is increased to 44%, a diaphragm filter press is used for filtration and dehydration. The feeding pressure is 0.85MPa, and the pressing pressure is 1.5MPa, filter press for 8min, high-pressure air pressure of 0.4-0.6MPa, backflush for 3min, the moisture content of the filter cake is 18.3%.
Example Embodiment
[0025] Example 2
[0026] An iron ore concentrate with a concentration of 12% is classified by a secondary hydrocyclone. +10μm coarse particle concentrate with a content of 85% is settled and concentrated by a high-efficiency thickener. After the concentration is increased to 72%, a microporous filter is used for filtration and dehydration. The filtration time is 7-12min, the filtration pressure is 0.05-0.12MPa, and the drying air pressure is 0.1 -0.15MPa, drying time 15min, filtration capacity increased from 300kg / m2·h to 590kg / m 2 ·h, cake moisture 8.6%. -10μm fine particle concentrate with a content of 90% is settled and concentrated by a high-efficiency thickener. After the concentration is increased to 48%, a diaphragm filter press is used for filtration and dehydration. The feeding pressure is 0.75MPa, the feeding pressure is 1.5min, and the pressing pressure is 1.2MPa. Press filter for 6.5min, high-pressure air pressure is 0.4-0.6MPa, backflush for 5min, the moisture ...
Example Embodiment
[0027] Example 3
[0028] A bauxite concentrate with a concentration of 15% is classified under the action of a hydrocyclone. The coarse-grained concentrate with +10μm content of 76% is settled and concentrated by a high-efficiency thickener under the condition of pH=7.4. After the concentration is increased to 67%, the vertical disc filter is used for filtration and dehydration. The vacuum degree is 0.38MPa. 210kg / m 2 ·h increased to 480kg / m 2 ·h, cake moisture 11.6%. -10μm fine-grained concentrate with a content of 81% is settled and concentrated by a high-efficiency thickener under the condition of pH=5.4. After the concentration is increased to 53%, a horizontal screw centrifugal dehydrator is used for filtration and dehydration. The drum speed is 1200r / min, The pushing differential speed of the screw is 15r / min, and the moisture content of the filter cake is 17.8%.
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