Year1
- 型号：
- VK-L30N
- 粒径nm：
- 20-30
- 含量%：
- 99.99
< >Adopt a certain mixing process to add a small amount of nanopowder to the ingredient system. For example, adding a small amount of nano-alumina () and nano-silica () to the ingredients of corundum bricks, and adding nano-ferric oxide to the ingredients of magnesia-chromium bricks can significantly improve the mechanical properties of the sample.
< >The experimental test results of the flexural strength and compressive strength of nano-silica () composite corundum bricks show that. The addition of nano-silica can greatly improve the mechanical properties of the sample. Especially when an appropriate amount is added, the strength of the sample fired at ℃
is increased compared with that without nano-materials. .~.times. For example, comparing the sample without nanopowder and the sample when adding % nanosilica (), the compressive strength increases from .,. to .,. respectively.
< >Photographs of the fracture surface of the sample after treatment at ℃, it can be seen that the microstructure of the r-grade refractory material has changed greatly after adding nano-iron oxide.
< >
, Nanocomposites
Castables
< > Castables have been stably and widely used in iron hooks because of their excellent properties. In order to further improve the high temperature resistance of the castable, especially the high-temperature mechanical strength, silica-alumina gel powder is used as the binding agent instead of pure calcium aluminate cement. Its introduction can significantly reduce the formation temperature and promote the formation of b-phase. generate. Therefore, the nano gel powder composite refractory castable has high high temperature flexural strength (℃.).
< >After adding gel powder, the formation temperature in the nanocomposite castable is reduced, and b has been found at medium temperature ℃, while for cement-bound castables, only the transition phase appears at ℃.
< >This type of nanocomposite refractory castable has completed industrial testing on the main trench (including the sand mouth) of a blast furnace in a domestic steel plant. Without repair, the one-time iron flow rate reaches .., exceeding the level of similar non-nano composite castables. It is currently being promoted and applied in the blast furnace trenches of other domestic iron plants.
< >Technical indicators:
Item
< > < >Indicators
< < >Model
< > < >< br/>
< < >Appearance
< > < >White powder
< < >Crystal form
< > < >Phase
< < >Content﹪
< > < >.%
< < >Particle size
< > < >Nano
Packaging: box
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