Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The invention provides a segment treatment method for fluorine-containing heavy metal wastewater. The method comprises the specific steps: after chemical reduction treatment of wastewater, adding a pre-neutralizing agent into a front segment settling tank to allow complexing precipitation of metal ions in the wastewater to occur, and carrying out concentration and plate-frame pressure filtration on sludge to obtain front segment sludge; feeding a supernate into a rear segment settling tank, then adding a post-neutralizing agent, discharging the supernate which meets the standard, allowing complexing precipitation of Ca<2+>, F<->, SO4<2-> and the like in the wastewater to occur, carrying out concentration and plate-frame pressure filtration on sludge to obtain rear segment sludge, and drying and smashing the sludge to obtain a cement mineralizer; and uniformly mixing the cement mineralizer with limestones, clay, a correcting material and the like, and grinding and calcining the mixture according to a conventional cement production and processing process to obtain cement clinker. The method provided by the invention not only realizes resource utilization of stainless steel cold-rolled sludge which can effectively replace natural gypsum and fluorite, thereby better satisfying the demand of low-temperature sintering, high quality and high yield, energy saving and consumption reduction of the cement clinker.
The invention provides a segment treatment method for fluorine-containing heavy metal wastewater. The method comprises the specific steps: after chemical reduction treatment of wastewater, adding a pre-neutralizing agent into a front segment settling tank to allow complexing precipitation of metal ions in the wastewater to occur, and carrying out concentration and plate-frame pressure filtration on sludge to obtain front segment sludge; feeding a supernate into a rear segment settling tank, then adding a post-neutralizing agent, discharging the supernate which meets the standard, allowing complexing precipitation of Ca<2+>, F<->, SO4<2-> and the like in the wastewater to occur, carrying out concentration and plate-frame pressure filtration on sludge to obtain rear segment sludge, and drying and smashing the sludge to obtain a cement mineralizer; and uniformly mixing the cement mineralizer with limestones, clay, a correcting material and the like, and grinding and calcining the mixture according to a conventional cement production and processing process to obtain cement clinker. The method provided by the invention not only realizes resource utilization of stainless steel cold-rolled sludge which can effectively replace natural gypsum and fluorite, thereby better satisfying the demand of low-temperature sintering, high quality and high yield, energy saving and consumption reduction of the cement clinker.
Segment treatment method for fluorine-containing heavy metal wastewater
SHI LEI (Autor:in)
06.01.2016
Patent
Elektronische Ressource
Englisch
Fluorine-containing wastewater treatment agent and preparation method thereof
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