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Acid-resisting alkali-resisting refractory castable for garbage incinerator

A waste incinerator, acid and alkali-resistant technology, applied in the field of refractory castables, can solve the problems of poor chemical corrosion resistance, short service life, poor thermal shock stability, etc., and achieve good chemical corrosion resistance, long service life, and high operating temperature high effect

Inactive Publication Date: 2014-01-08
宜兴市张泽浇注耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Municipal waste is relatively complex, including glass, ceramics, ash, metal, rubber, plastic, etc. When calcined in the calciner of the new dry process cement production line, an acidic and alkaline atmosphere is generated. The castables currently used have poor chemical corrosion resistance. The thermal shock stability is poor, and the service life is short, generally about six months, which can no longer meet the use requirements under this condition

Method used

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  • Acid-resisting alkali-resisting refractory castable for garbage incinerator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The refractory, acid-resistant and alkali-resistant castable for garbage incinerators includes the following raw materials, and each raw material is combined according to the following weight parts:

[0026] Low iron sintered mullite M50 65 parts,

[0027] Boron carbide powder 10 parts,

[0028] 3 parts silicon carbide,

[0029] 8 parts of pure calcium aluminate cement,

[0030] 8 parts of chromium trioxide powder,

[0031] α-Al 2 o 3 Micropowder 4 parts,

[0032] uf-SiO 2 3 copies,

[0033] 3 parts zirconia,

[0034] Magnesium oxide 1 part,

[0035] 0.1 parts of water reducing agent,

[0036] 0.1 part of retarder,

[0037] Anti-explosion agent 0.5 part.

[0038] Add 5-6 parts of water by weight to mix and stir during construction.

Embodiment 2

[0040] The refractory, acid-resistant and alkali-resistant castable for garbage incinerators includes the following raw materials, and each raw material is combined according to the following weight parts:

[0041] Low iron sintered mullite M50 70 parts,

[0042] Boron carbide powder 5 parts,

[0043] Silicon carbide 5 parts,

[0044] 8 parts of pure calcium aluminate cement,

[0045] 5 parts of chromium trioxide powder,

[0046] α-Al 2 o 3 Micropowder 6 parts,

[0047] uf-SiO 2 3 copies,

[0048] 1 part zirconia,

[0049] Magnesium oxide 3 parts,

[0050] 0.5 parts of water reducer,

[0051] 0.05 part of retarder,

[0052] Anti-explosion agent 0.1 part.

[0053] Add 5-6 parts of water by weight to mix and stir during construction.

Embodiment 3

[0055] The refractory, acid-resistant and alkali-resistant castable for garbage incinerators includes the following raw materials, and each raw material is combined according to the following weight parts:

[0056] Low iron sintered mullite M50 68 parts,

[0057] 7 parts of boron carbide powder,

[0058] SiC 4 parts,

[0059] 7 parts of pure calcium aluminate cement,

[0060] 6 parts of chromium trioxide powder,

[0061] α-Al 2 o 3 Micropowder 5 parts,

[0062] uf-SiO 2 5 copies,

[0063] Zirconia 2 parts,

[0064] Magnesium oxide 2 parts,

[0065] 0.3 parts of water reducing agent,

[0066] 0.07 parts of retarder,

[0067] Anti-explosion agent 0.3 parts.

[0068] Add 5-6 parts of water by weight to mix and stir during construction.

[0069] The test results of physical and chemical properties of the refractory, acid-resistant and alkali-resistant pouring for waste incinerators in the above examples are shown in the table. Since there is no national standard in...

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Abstract

The invention relates to a refractory castable, and particularly relates to an acid-resisting alkali-resisting refractory castable for a garbage incinerator. The acid-resisting alkali-resisting refractory castable comprises the following raw materials: low-iron sintered mullite, boron carbide powder, silicon carbide, pure calcium aluminate cement, chromium trioxide powder, alpha-Al2O3 fine powder, uf-SiO2, zirconium oxide, magnesium oxide, a water reducing agent, a retarder, an explosion-proof agent and the like. The acid-resisting alkali-resisting refractory castable for the garbage incinerator, provided by the invention, has the advantages of good chemical corrosion resistance, good thermal shock stability, high operating temperature and long service life.

Description

technical field [0001] The invention relates to a refractory castable, in particular to a refractory, acid-resistant and alkali-resistant castable for garbage incinerators. Background technique [0002] The use of new dry kilns to treat municipal waste is one of the most effective ways to deal with domestic waste. In addition to inheriting the advantages of the rotary incinerator, the new dry kiln has its own obvious advantages: the cement kiln is long enough to ensure the waste is burned out and the toxic gas is fully decomposed, reducing the pressure of the flue gas treatment system and protecting the environment; the cement kiln The heat load is large, and the maximum temperature of the flue gas in the production process reaches 1700 degrees, which ensures that the waste is completely incinerated and the toxic flue gas is fully decomposed; the waste can be put into the kiln without careful crushing, and the adaptability is strong; the waste rolls, collapses, Stirring is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 张伟良郭伟强
Owner 宜兴市张泽浇注耐火材料有限公司
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