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Alkali-resistant, chlorine-resistant and fire-resistant casting material
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A refractory castable and alkali-resistant technology, applied in the field of chlorine refractory castable and alkali-resistant, can solve the problems of damage to refractory materials and the inability to meet the use requirements of waste incinerators, and achieve the effect of ensuring normal operation.
Inactive Publication Date: 2003-10-22
宜兴天霸非金属材料有限公司
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[0003] In addition, when the waste containing chloride is incinerated, when the incineration temperature is above 800-850°C, chlorine can be converted into hydrogenchloride. The material is basically resistant to chlorine attack, but the Fe in the refractory 2 o 3 , CaO is easy to react with chlorine, and the resulting FeCl 3 , CaCl 2 It is a liquid phase, so it will volatilize and cause damage to refractory materials, so low iron and low calcium will be the key
However, the iron content of general high-aluminabauxite and clay raw materials is greater than 2%, and the calcium content of the castable is greater than 3%, so it cannot meet the requirements of waste incinerators.
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Embodiment 1
[0025] Embodiment 1, alkali-resistant, chlorine refractory castable, its component ratio relation is (weight percent):
[0061] The calcined andalusite particles involved in the above-mentioned examples are firstly put the andalusite concentrate into the sand mixer by adding a temporary binder (pulp waste liquid or yellow dextrin, etc.), and press it into a brick at 1400°C through a friction brick press. Sintering in the kiln for more than 12 hours, and then the sintered bricks are coarsely broke...
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Abstract
The present invention relates to an alkali-resistant, chlorine-resistant and refractory pouring material, its composition contains: calcined andalusite granules whose grain size is less than or equalto 5mm, 87-90%, pure calciumaluminatecement 4-5%, Al2O3 micropowder whose grain size is less than or equal to 10 micrometers, 3-4%, SiO2 micropowder whose grain size is less than or equal to 5 micrometers, 2-4% and compound water-reducing agent 0.2-0.4%. The basic composition of said invention is of mullite phase, and as compared with other pouring material the Fe2O3 and CaO contents of said invented pouring material can be greatly reduced. It can be used for making liner of refuse incinerator, and its alkali-resistant and chlorine-resistant properties can be greatly raised.
Description
technical field [0001] The invention relates to a refractory material, in particular to an alkali-resistant and chlorine-resistant refractory pouring material used in garbage incinerators. technical background [0002] Reaction of High Alumina Refractories with Alkali to Generate β-Al 2 o 3 , The expansion caused by the reaction destroys the tissue; the clay refractory reacts with the alkali to form low melting point compounds such as nepheline, which promotes the melting loss of the refractory. When the waste incinerator is working, a large amount of NaCl, KCl, and alkali vapor will be generated, and the C / S is relatively large. The mullite (3Al 2 o 3 2SiO2 2 ) quality refractories show relatively good corrosion resistance, and andalusite concentrate can undergo mullite transformation after calcination at greater than 1400 ° C, and the phase change contains more mullite crystals. [0003] In addition, when the waste containing chloride is incinerated, when the incinera...
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