Open AccessFiltration materials of natural origin
Author(s) -
Alexander K. Strelkov,
P G Bykova,
M A Gridneva
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/962/2/022038
Subject(s) - filtration (mathematics) , expansive , aggregate (composite) , raw material , filter (signal processing) , materials science , natural materials , drainage , environmental science , pulp and paper industry , composite material , mineralogy , waste management , chemistry , compressive strength , mathematics , engineering , polymer science , ecology , statistics , organic chemistry , electrical engineering , biology
The research reveals test results of physical and mechanical properties of filtration materials of natural origin (that is of crushed expanded-clay aggregate with 525 and 555 kg/m3 bulk density and “Diamix AQUA” with 670 kg/m3 bulk density). The raw materials for the production of expanded-clay aggregate are easily expansive clays containing such oxides as SiO2 (up to 60 %), Al2O3 (up to 20 %), Fe2O3 (from 4 to 20 %). “Diamix AQUA” is a material obtained on the basis of natural diatomite which contains exoskeletons of diatoms. The content of oxides in “Diamix AQUA” is as follows: SiO2 – no less than 83%, Al2O3 – no more than 6%, Fe2O3 – no more than 3.5 %. There are certificates of state registration for both types of filtration materials. The research results of the new filtration material “Diamix AQUA” used as a filter bed showed its acceptable physical and mechanical properties. “Diamix AQUA” regenerating requires an increased wash-water rate. Such filter media can be applied to newly constructed filtration facilities. When using “Diamix AQUA” in existing filter beds, it is necessary to check the capacity of the drainage and distribution system.