Water Treatment 1. Description Ceramic grain filters are made of refined pottery clays added with certain modifiers, and processed of grinding, mixing, shaping and high temperature sintering. They do not contain any substances that harmful to people or environment. They are hard and rough in surface, porous inside the structure, and have the advantages of high mechanical strength large specific surface area and porosity, When used in water treatment, they behave a activated surface property, a great amount of pollutant entrapment, less water head loss in the filter bed, lower consumption of back-flush water, stable in chemical and gbiologic property, and long service life. Ceramic grain filters is a new and efficient filter material to increase the water yield, upgrade the water quality, and save chemicals and energy.
2. Chemical composition:
Composition
SiO2
Al2O3
Fe2O3
CaO
MgO
KO2 ± Na2O
The balance
Content %
50~70
15~25
0.5~10
15
38
≤ 2
3. Technical Indexes
Item
Index
Appearance
Rough ball; porous, red & brown
Particle Size, mm
0.5 30
Apparent density, g/cm3
1.2 1.6
Bluk density, g/cm3
0.6 1.2
Total porosity, %
60 80
Specific surface area, cm2 / g
5000 10000
Attrition & crushing rate, %
Uneven coefficient
K80 = 1.2 1.5
Even coefficient
K60 = 1.0 1.3
Solubility in acid,%
Solubility in alkali,%
≤ 1.5
Soluble substance
No any harmful elements contained
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