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(A) Characteristics of Diatomite
Diatomite is the sediment of substances chemically formed after unicellular birds or various plants in lakes or the sea was settled on the bed so that the valle cas-vicalvaro sedimentary layer was formed and then the water in the lake area was evaporated because of the dry weather during the Tertiary Middle Cenozoic era.
(B) General Property
- Chemical formula: SiO2·NH2O
- Color: Light brown or white
- Amorphous or shaped crystalline
- Formation of three-dimensional network(needle or angle) structure, depending on crushing or drying methods.
- Specific gravity: 1.90~2.35
- Surface area: 15~90㎡/g
- Specific heat: 0.23㎈/25℃
- Pore size: 0.5~2.0㎛
- Hardness: 1.5(MOHS)(in a cohered state)
(C)Chemical Composition
(D)Main Applications
Moisture and water absorbents, insulating materials(insulating and refractory bricks), filters, tobacco and other filter products, abrasives, microorganism adsorbents, asphalt fillers, and other building materials
(E) Important Characteristics
Diatomite provides superior heat and humidity insulating effect. In particular, we offer diatomite products with high absorptivity by forming three-dimensional network, needle or angle structure through special drying and crushing so that the swelling property is maximized.
(F) Microscopy of Diatomite's Crystalline Structure(×400)
325MESH 99.9%
(G) Difference from other makers in producing diatomite
(H) How to test swelling in producing a final product
- Accurately scale a 3g of diatomite and a 3g of slaked lime(Ca(OH)2) as the 1st grade reagent to 0.01g on the basis of dry measure, and put them into a 240㎖ nursing bottle and mix them together.
- Take and put a 200㎖ of hot water(95~100℃) into the nursing bottle containing the sample, and leave it for five minutes for the sample to be settled.
- Put the nursing bottle in a constant temperature water tank. Then, take it out from the tank every fifteen minutes and measure the sample's swelling value. After stirring the solution with a spoon ten to twenty times, put the bottle in the tank.
- Find the maximum value by repeating these steps. The maximum value becomes the swelling value(㎖).
- Put the volume, measured every fifteen minutes, into the form of a graph, and indicate the hourly change of the volume on the graph.
- In the swelling test, the time when the maximum capacity is found becomes the swelling time.
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