Smelting Contains The Arsenic Wastewater Disposal Experiment And Applied Research Including The Arsenic Dirt Acid And The Acidity

Along with to smelts the enterprise dirt waste water emissions request day by day strictly, has the dirt sour dirt waste water processing question in the smelting production process to receive day by day takes seriously. This article has the low pH value and including the arsenic concentration high polluting property in view of some complex fine gold mining and metallurgy refinery technological transformations project emission's dirty acid and the acidic waste water, has conducted the purification mechanism research to this dirt sour dirt waste water, through to chooses the processing plan the experimental study, obtains the corresponding superior processing craft, and carries on the technological design according to the findings.Through enters the water analysis, the reelection plan experimental study and the water leakage water quality situation, obtains:Uses the vulcanization+limestone two sections of heterodyne systems in view of smelting including the arsenic dirt acid design to process the new craft, to contains the arsenic dirt acid to carry on reduces the quantification, to fall the acid treatment, the processing water leakage mixes the factory district acidity to carry on the next step including the arsenic waste water processing; Uses the lime law+two section of lime-mole site law in view of the acidity including the arsenic waste water design to carry on degeneration processing to the acidity including the arsenic waste water, and applies two kind of processing crafts in the actual project.Vulcanization+limestone two sections of heterodyne systems which uses including the arsenic dirt acid treatment design, processes in the water leakage the arsenic elimination rate to be possible to achieve 97.64%, during elimination arsenic's, SS,Hg, the F content also obviously reduces. Technological design section of vulcanizations throw add the Na2S medicament, mainly defecates in the acid the Hg ion, simultaneously reduces as ion content, the control response pH value in 7-9; Two sections use the limestone heterodyne system, will smear the acid pH adjustment to be possible to reduce to 8～10, As to the water leakage standard, simultaneously the water leakage assumes the alkalinity, may after the factory district acidic waste water neutral carries on the following processing.The acidity uses the lime-two section of lime+lime-ferric salt process including the arsenic waste water's processing design, through joins 10% Ca(OH)2, controls the pH value is 10-11,simultaneously joins 10% FeSO4·7H2O and passes over has the pressure air aeration, joins the mol site in the waste water (FeSO4·7H2O) and the lime, the adjustment water leakage pH value between 6-9,in the reaction process, Fe2+ transforms Fe3+, As3+ to transform As5+, thus the production solubility very small FeAsO4 precipitation, precipitates while FeAsO4 plays the flocculation altogether to sink the role, removes in the acidic waste water thoroughly the arsenic and other metallic ion, causes to process in the water leakage the arsenic to process finally achieves99.7%, the processing water leakage may attain a designated standard the emissions.At the same time, the dirty acid treatment and the acidic wastewater disposal's continuity causes the processing craft to be continuous, in comprehensive utilization treating processes acid-base waste water neutral powerful condition.