会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 7. 发明专利
    • REGENERATION OF CLEANING WATER FOR AGGREGATE FOR CONCRETE
    • JPH10263313A
    • 1998-10-06
    • JP7629697
    • 1997-03-27
    • JUJO PAPER CO LTD
    • ICHIHARA TOSHIAKISUMIYAMA HIROYUKIKANEKO IKUKUDO MASAKUNI
    • B01D21/01C04B18/16C04B22/00
    • PROBLEM TO BE SOLVED: To regenerate a cleaning water which gives no influence on the slump flow even when a flocculant deposits on crushed sand by subjecting a contaminated water produced in a cleaning process of an aggregate for a concrete to a treatment with carboxymethylcellulose and polyaluminum chloride so as to flocculate and precipitate the sludge, and then adding a cellulase to the supernatant. SOLUTION: A carboxymethylcellulose(CMC) is added to a contaminated water produced in a cleaning process of a crushed sand and the like so that the suspended substance which intrinsically has negative charges is further electrified into negative changes by the anionic property of the CMC. Then polyaluminum chloride(PAC) having positive charges is added to neutralize the charges so that even inorg. fine particles which can no be precipitated by the weak negative charges intrinsic to the inorg. suspended substance can be rapidly precipitated to clarify the contaminated water. When the recovered water contains CMC and PAC as the flocculant after the precipitate is separated, the flocculant affects the slump flow, therefore, a cellulase is added to decompose CMC. Thus, the regenerated cleaning water can be used to produced a good concrete.