METHOD OF RECOVERING WASTE ADSORBENT Russian patent published in 2011 - IPC B09B1/00 C04B18/04 

FIELD: process engineering.

SUBSTANCE: invention relates to recovery of waste adsorbents and may be used for binding of waste adsorbents. Proposed method comprises adding siliceous sedimentary rock to Portland cement clinker, crushing and mixing obtained mix. Note here that additive represents waste terra silicea used as adsorbent in treatment of effluents and dried at 105°C. Components are fed into dry mix in waste terra silicea-to-Portland cement clinker ratio equal to 0.5-1.8:1. Dry mix is mixed for 15 min at blade rpm in mixer equal to 45-60. Then, water is added at dry mix-to-water ratio of 1:0.7…0.87 in continuous mixing for 10 min. Said mix is hardened to cement stone of high stability and retention of harmful substances absorbed by waste terra silicea at atmospheric effects.

EFFECT: reliable recovery of waste adsorbent in producing cement stone to neutralise harmful substances, that features high stability under effects of biosphere in its burial.

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