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Alkali resistant refractory castable

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    Alkali resistant refractory castable

    Description of alkali resistant castable products

    Alkali - resistant refractory castable belongs to aluminum silicate acid refractory castable.Alkali-resistant castable is characterized by: at 1250℃ the surface of the formation of skin erosion resistant protective layer.

    It can effectively prevent the erosion and penetration of alkali airflow and materials in cement kiln at high temperature.Alkali resistant castable is widely used in cement rotary kiln because of its high strength and low body density.Alkali resistant castable is a kind of alkali resistant castable made of aluminum silicate as refractory aggregate and powder and made of aluminate cement and admixture.This kind of castable can be divided into two kinds, which are heavy and light, and has good high temperature performance and alkali erosion resistance.

     

    In addition, sodium silicate clay refractory castable also has alkali resistance, can resist the erosion of sodium salt melt.Therefore, it can be used in alkali recovery furnace of papermaking industry and get better effect.

     

    Alkali-resistant refractory castable is made of fused corundum, zirconium corundum, magnesia, magnesia alumina spinel, chromite and zirconium, etc. The castable is made of aluminate cement and admixture, and is put into K2CO3 and roasted at 1200 ℃ for 8h to evaluate alkali resistance.When cement and Al2O3 powder are the same, electrofused spinel is the best material for alkali resistance, and electrofused magnesia, chromium ore, electrofused corundum and zirconium corundum drop successively.When spinel is used as aggregate and 5 ~7% zircon powder is added, the alkali resistance is the best, and the sample is almost no damage.The damage mode is mainly corrosion.

     

    Physicochemical indexes of alkali resistant castable:


     

    No. YNNJ1 YNNJ2 YNNJ3 YNNJ4 YNNJ5 YNNJ6
    Castableheavylight
    Al2O3/% <40 40 48 66 >35 >35
    volume density/ g·cm-3 2.15 2.16 2.31 2.68 1.68 1.64
    pressive sttrength/MPa 110℃
    1100℃
    1500℃
    42
    20
     
    81
    80
    (1000℃)
    88
    90
     
    110
    120
    175
    38
    32
     
    28
     
     
    bending strength/MPa 110℃
    1100℃
    1500℃
    5.4
    2.0
     
    7.8
    8.1
     
    9.8
    1015
     
    11
    3.5
    17
    4.0
     
     
    2.5
     
     
    burn after  line            changes % 1500℃ -0.5 -0.4
    (1000℃)
    -0.3 -0.98 -1.2
    (1200℃)
    -1.2
    (1200℃)

     Heavy alkali resistant refractory castable is made of magnesium-aluminum spinel and bauxite clinker as refractory aggregate and powder, and mixed with Al2O3 powder.Light alkali resistant refractory castable is made of low alumina clay, such as shale ceramsite, etc.The binding agents of the two castable materials are ca-70 cement and ca-50 cement, and at the same time, alkali resistance agent and ultra-fine powder are added.The following table shows the alkali resistant properties of high alumina and light weight aggregate.CaO content of no. 1 and no. 2 in the table is 1.39%, which is a low cement refractory castable, and can be used for high temperature parts as well as alkali erosion parts.The alkali resistance of this kind of refractory castable should be tested according to the national standard GBI0696.             

    Zibo Yuneng Kiln Technology Co.,Ltd. is the professional Alkali resistant refractory castable manufacturer in Shandong。Our company Alkali resistant refractory castable sincerely obtains the prestige,rewards our customers with the preferential price of Alkali resistant refractory castable and warm service。Our main products:refractory castable,high strength castable,alumina silicate fiber module,alumina silicate felt,alumina silicate fiber blanket,alumina silicate cotton,etc。The products sell well in dozens of metallurgical,chemical and electric power enterprises all over the country and are well received by users。The company's unique production process,quality management and testing equipment to ensure product quality and stability,has a high-quality staff and professional and technical personnel,according to the different requirements of users,the development and design of a variety of new refractory materials。To know the latest Alkali resistant refractory castable price can be posted on our website https://www.zbyuneng.cn,we will contact you within 24 hours,Tel: 13864463333 Manager Sun。

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