The Manufacture of Coagulants in Coal Cleaning Plant;

Discussion on the laboratory test of realizing depth clarification of coal slime water through adding calcium/magnesium ion coagulant

Starting from specialty of coal water slurry,the mechanism of loculation and coagulation of particles in them,the best reagentrations of coagulant and flocculate,and the suitable subsequent of reagent are studied,which could accelerate the settlement of coal water slurry,reduce the thickness of overflow,and realize closed cycle of washingwater.

With the strontium nitrate flocculants, the lead ion and the standard solution k2Cr2O7 can rapidly cement out with PbCrO4,which PH value is from 3 to 4.

The mixture of reagent should be paid attention and the adding amount of coagulant and flocculant should be controlled strictly,sewage tank and acid-resisting pump should be bettered in waste water treatment.

Chosen slurry simulated by clay existed in coal series as subjected investigated, the paper uses organic high polymers flocculants such as PAM, PEO, chitosan and polyacrylic acid-natrium and inorganic coagulants like PAC, CaCl_2, Ca(OH)_2 and KAl(SO_4)_2 to do flocculating settling experiments, and studies the evaluating indicators like sedimentation velocity, clarity and compaction of floc.

For the depositing colloid, we often choose the depositing materials with the opposite charge to the colloid.

It introduced the process and correlative analysis of bench-scale experiment which adds mineral MC flocculant and anionic polyacrylamide to hasten the defecation of slime water.