FC Magnesia carbon whole tapping hole

  Magnesia carbon whole tapping hole

      The tap hole of converter is the unique channel from the Bof to the ladle , it is crucial for the steel plants to improve the working ratio, increase the output within the unit time ;while the working condition of the taphole is extreme harsh :                              1.It is impacted by steel water under 1500-1700 degrees again and again;     

      2. It is oxidized, washed and eroded frequently;

      3.It is easy destroy because of the quick cooling in treat .

     Under the severe working environment ,the inside diameter of tap hole is expanded more and more, tapping time decrease with the usage frequency’s increasing, tapping time is shorter than stimulate ones ,then slag entrapment will become the inevitable phenomenon, this will effect the output heavily .At this situation we have to change the tap hole .

     The service life of tap hole will effect the Metallurgical cycle,steel productivity , effect of slag of the converter ,and then the quality of the steel directly. The good degrees of tap hole will control the amount of slag of converter immediately ,and effect the absorb for the alloy together with the continue treatment directly .

     In view of above reasons ,the steel plants by converter pay much more attention to the tap hole ,list the technical and manufacture into the most important item, so it is an indisputable reality that it is for the converter that the tap hole is vital important. 

 

Manufacture:

 

     1. Use the 99% Large crystal as the main raw material , it can make the bricks’ structure  dense , 

with the strong resistance for washing and errosion ,and then prove the refractoriness ,strengthen 

the resistance from the slag ;  

     At the same time we add 599 flake graphite as binder, this kind of large Phosphate

 tablets  can improve the ability of resisting oxidizing .

  1. We import CaB6 and use this kind of material as the additive, which can refine the resistance of oxidizing obviously;                               
  2. Mix the raw material above and other ones together evenly 
  3. Forming by isostatic pressing machine and dry under high temperature .

Product feature:

5 Perfect thermal shock ability ,can resist the extreme cold and hot 

  1. Dense structure ,high resistance for washing and erosion ,
  2. .excellent resistance for oxidizing slag and spalling ;
  3. .high refractoriness; 
  4. Wonderful sinter ability, and adhesion

Product application: apply to the steel  water pouring out for BOF and electric arc furnace  

 

specification

Item

Number

Chemical 

MgO

:≥78%

C:

≥12%

physical 

CCS            

≥30MPa

AP        

 ≤ 5%

         BD     

      ≥2.9g/cm3

     Refractoriness

    1500℃-1600℃       

 

 

 

 

 

 

Construction: To install 

Packing : 

 

Store:

  1.under the room temperature.

  2.Time: half a year

  

Pay attention to :

 




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 FC  Magnesia carbon whole tapping hole
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