Silicon nitride bonded silicon carbide products - aluminum electrolysis slot wit

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5 m.t
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Product Description:

Application: aluminum electrolysis bath side wall, the chemical industry reaction tank, a variety of high temperature abrasion resistant lining board, outlet bricks, furnace heating furnace and the aluminum liquid conveying pipe.

Features: has the advantages of long service life, high hardness, high temperature strength, liquid aluminum erosion and thermal erosion abrasion resistance, anti acid and alkali, corrosion resistance, low linear expansion rate higher characteristic, thermal conductivity.

 

Product name
 
Silicon nitride bonded

silicon carbide products 
 
Chemical composition (%)

 

SiC  ≥ 72.0
 

Si3N4 ≥ 21.0
 

Fe2O3 ≤ 0.3
 

Si ≤ 0.3
 

Display the porosity (%)    
 ≤ 16.0
 

The volume density(g/cm3) 
 ≥ 2.68
 

Compressive strength at room temperature (Mpa)
 ≥ 180.0
 
Flexural strength

(Mpa) 
  

Normalatmospheric temperature

 
 ≥ 45.0
 

1400℃  ≥ 55.0
 

Thermal conductivityλ(W/m·K)

 
The experimental temperature

650℃
 19.5
 

 
The experimental temperature

1000℃
 17.2
 

Coefficient of temperature conductivity

α(cm2/s) 

 
The experimental temperature

650℃
 0.064
 

 
The experimental temperature

1000℃
 0.053
 

Linear expansion rate
 α30—1000
 4.02×10-6(k-1)
 

 α30—1100
 4.06×10-6(k-1)
 

 

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Q:Is there a big difference between two high alumina brick and one high alumina brick?
The difference between the two kinds of high alumina bricks is great. I perennial in Zhengzhou was responsible for the production and sale of colt refractories
Q:How much is one ton of high alumina refractory brick?
Three high aluminum refractory brick Zhengzhou Kuwait is generally around 800. 32 years of experience, good.
Q:Aluminum content 38. silicon content 55 What refractory bricks?
High alumina brick:The mineral composition of the high alumina brick is determined by the bauxite used. The mineral composition of the clinker is usually mullite, corundum and glass. The theoretical composition of mullite is Al2O371.8%, SiO2 28.2%, and its melting decomposition temperature is 1840 DEG C. With acicular crystal, network cross structure, high temperature state showed better strength. Corundum in the form of alpha -Al2O3, melting point of 2050 degrees, hardness of Mohs 9, showing a granular and columnar crystal, has good chemical stability, acid, alkaline slag have a certain resistance. Based on the composition of mullite minerals, the phase composition of high alumina brick can be judged according to the content of Al2O3. When the bricks are below Al2O3 71.8%, the base of the composition is mullite and SiO2, such as grade LZ-48 bricks. Because it contains a large number of SiO2 formed in the liquid phase under high temperature is 20% ~ 30%; brick in Al2O3 more than 71.8%, the excess Al2O3 formed corundum crystal under high temperature, while generating 2 high temperature phase, eutectic temperature rise by the low content of Al2O3 brick 1595 C to 1840 C, such as grade LZ-75 brick. In fact, it is impossible to produce a complete phase equilibrium in the process of production, but the glass phase is very small, and there is no more than 10% in the partial gap of the Yu Jing phase
Q:Are there any differences between insulating bricks and refractory bricks?
Heat preservation brick is to emphasize its heat preservation performance generally, not paying much attention to its refractoriness, but refractory brick is exactly the opposite. Different locations will use different materials, I hope we can choose carefully.
Q:What is the standard size of high alumina brick?
The country has laid down a number of criteria for the use of refractory bricks to unify market demand.
Q:The difference between light high alumina brick and heavy aluminum brick
Lightweight high alumina brick, also called high alumina insulation brick. Alumina content of 48% or more, mainly from mullite and glass phase or corundum composition of lightweight refractory. Volume density 0.4 - 1.35g/cm3. Porosity 66% - 73%, compressive strength 1 - 8MPa. Better thermal shock resistance. Usually, a high alumina clinker is added with a small amount of clay. After grinding, it is poured and shaped in the form of slurry by gas generation or foam method, and it is fired at 1300 - 1500 DEG C. Sometimes industrial alumina can be used instead of some bauxite clinker. Used for lining and insulation of masonry kilns, as well as for areas where there is no strong, high temperature molten material erosion and erosion. When contacting the flame directly, the surface contact temperature shall not be higher than 1350 degrees centigrade.
Q:What kinds of minerals are there in the five major categories of ore crystal chemistry?
Sulphide. A total of more than 200~300 kinds, followed by the type of silicate minerals, the weight of 0.25% of the crust. Chang Fu is an important nonferrous metal deposit, which is an important source of copper, lead, zinc, antimony and so on. It is of great economic value. The main features are: metal luster, color, streak is deep, low hardness, good thermal conductivity, than the major. Another feature is that because sulfides are often associated with magma, it is very easy to oxidize under the surface supergene action. Except for pyrite (6 ~ 6.5 hardness), the hardness is very low. Such minerals pyrite, chalcopyrite, galena, FeS2 CuFeS2, PbS, Sb2S3, stibnite sphalerite molybdenite, cinnabar HgS MoS2.
Q:Which thermal shock stability of clay brick and high alumina brick is good?
High alumina brick is made of superfine alumina, fused corundum and fused mullite as main refractory materials.
Q:What is the density of a super high alumina brick and what is the price?
Of course, the transaction price, please choose refractory brick manufacturer is better.
Q:What is the difference between corundum and high alumina??
The main components of high alumina brick are high alumina bauxite, mullite and partial corundum sand.

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