ceramic grain filter

Product 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 backflush

water, stable in chemical and biologic 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.

Chemical Composition of Ceramic Sand Filters

Composition	Content %
SiO2	50-70％
Al2O3	15-25％
Fe2O3	0.5-10％
CaO	1-5％
MgO	1-5％
KO2+NaO	3-8％
The balance	≤ 2

Technical Indexes of Ceramic Grain Filter

Item	Index
Appearance	Rough ball, porous, red & brown
Grain diameter，mm	0.5-30
Apparent Density,g/cm3	1.2-1.6
Bulk density,g/cm3	0.6-1.2
Total porosity,%	60-80
Specific surface area,cm2/g	5000-10000
Attrition & crushing rate,%	≤2
Even coefficient	K80=1.2-1.5
Even coefficient	K80=1.0-1.3
Solubility in acid,%	≤2
Solubility in alkali,%	≤1., 5
Soluble substance	No any harmful elements contained

Product Size(mm): Φ1-2，Φ3-5，Φ5-6，Φ6-8，Φ8-9，Φ9-10，Φ10-12，Φ13-15，Φ16-20，Φ21-30