In general, the technological design process of xonotlite-type calcium silicate insulation board is as follows: firstly, the limestone is calcined to produce lime; Secondly, lime, silica pow generated by crystallization, wat and additives (such as zirconium oxychloride and strontium nitrate) are mixed and evenly mixed; Then, an autoclave with a stirrer is used to synthesize xonotlite slurry; Then, China fiber is added, molded by steel mold filtration technology, and then treated and dried to obtain a thermal insulation product. In order to improve the performance, amorphous silica micropowder can be used to partially replace or even completely replace crystalline silica powder. In order to improve the production efficiency, the xonotlite slurry with fiber can be dehydrated in vacuum, squeezed and then molded by mechanical pressing. Some important contents in the process control of calcium silicate board are the selection of calcium and silicon raw materials, reaction temperature and time, stirring speed and so on. When quartz powder is used as siliceous raw material, at 200°C, only C-S-H gel and Si02 exist, and at 210°C, the peaks of C-S-H gel and silica disappear, forming xonotlite, and there are some small amounts of tobermorite. When the temperature can be raised to 220°C, only xonotlite exists; The conditions of 230°C and 220 C are basically the same. This shows that 220°C is the best temperature for the reaction.一般情况下，硬硅钙石型硅酸钙隔热板的工艺设计流程是：先将影响石灰石锻烧制得石灰;其次，将石灰、结晶产生二氧化硅粉料、水和外加剂（如氧氯化锆、硝酸锶）配合、拌匀;接着，用带搅拌器的蒸压釜合成硬硅钙石料浆;然后，加入中国纤维，经钢模压滤技术成型，再经处理烘干后得到一个隔热材料制品。为了提高性能，可以用无定形二氧化硅微粉部分取代，甚至全部代替结晶二氧化硅粉料。为了提高生产效率，还可以把加入纤维的硬硅钙石浆体经真空脱水、挤泥后，再经机压成型。硅酸钙板工艺控制的一些重要内容是钙质和硅质原料的选择、反应温度和时间、搅拌速度等。以石英粉为硅质原料时，200°C下，只有C-S-H凝胶与Si02存在，210°Process design flow of xonotlite type calcium silicate insulation boardC时，C-S-H凝胶与二氧化硅的峰消失，形成硬硅钙石，也有一些少量的托勃莫来石;温度可以升至220°C时，只有硬硅钙石;230°C与220℃的情况进行大体保持一致。这说明220°C是最佳选择反应进行温度
硅酸钙板生产线设备 硅酸钙绝热板 硅酸绝热管壳 纤维水石棉瓦生产线泥瓦生产线
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