Treatment Of Acidic Waste Water Of Kaolin Mineral Separation With Naturalization Method And Application

To alleviate some of Mao Ming Kaolin Producers acidic wastewater pollution onthe surrounding mineral water, to achieve energy saving Kaolin production industry,this experiment Kaolin mineral separation wastewater for the study, the experimentaluse " Neutralization-Precipitation–pH pullback-Coagulation" Method to treatwastewater, the subject belongs to the static laboratory simulation experiments.This experiment use " Neutralization-Precipitation–pH pullback-Coagulation"process, in order to advance the prepared lime slurry as an experimental treatmentwith a neutralizing agent to Kaolin mineral separation wastewater, analyzed andsummarized the color characteristics of Kaolin mineral separation wastewater,explores the color reaction mechanism of acidic wastewater iron; choose Kaolinmineral separation wastewater treatment experiments neutralization, oxidation,flocculation units as of this experimental study focused on the processing elementsinfluencing factors do further study; through experimental results and the theoreticalanalysis of the optimal operating parameters process unit.The Kaolin mineral separation wastewater color experiments were carried outFe2+and Fe3+study color characteristics, explores the color mechanism of iron ions, inorder to achieve better treatment effect, Kaolin mineral separation wastewaterdischarge standards required to control the pH6to10, if you want the water tocompletely remove the precipitated iron ions, acidic wastewater need to control ironion concentration is less than5.1mg/L.Neutralization of Kaolin mineral separation wastewater experiments, analyzedthe use of lime and carbide slag beneficiation of Kaolin mineral separation wastewatertreatment can achieve the same effect, but the amount of carbide slag to be more thanthe amount of lime, the resulting sludge would be more appropriate, consider theaccount the transportation costs, this experiment is to use lime as a neutralizing agent;adding lime to wet, dry not control the amount and pH, by stirring in a way to speedup the reaction, increasing the contact area ofthe reaction, and the pH of thereaction to achieve the best results from10to11and stirred for15min to achieve thereaction has been carried out in a more thorough10min the mixture after precipitationof solid-liquid separation can be better to increase the settling time of no separationsignificant enhancement.Kaolin beneficiation acidic pH of the supernatant water after the separation of anti-adjusted to6to10, the mixed solution was subjected to oxidation with airaeration15min. PAM flocculants solution was then added to a stirred mixture of1min,then the reaction allowed to stand for10min, the reaction effluent is pH7-10, Totaliron below5mg/L.The results of this experiment show that the " Neutralization-Precipitation–pHpullback-Coagulation" New Process Kaolin mineral separation wastewater;, total ironremoval of acidic waste water can reach more than98%, color removal rate can reach95%or more, the targets were detected tail water reach "Integrated Wastewaterdischarge Standard" level of GB8978-1996emission requirements.