Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Composite ceramsite and preparation method thereof
The invention provides composite ceramsite and a preparation method of the composite ceramsite. The preparation method comprises the following steps: mixing and ball-milling sludge, shale and a binder to obtain mixed powder; granulating the mixed powder to obtain raw material balls; preheating and drying the raw material nodules until the moisture content is less than 2%; and roasting the dried raw material balls by adopting biomass, and conducting cooling after roasting to obtain the composite ceramsite. According to the preparation method, sludge and shale are taken as main raw materials, biomass is taken as a fuel, after the sludge is subjected to high-temperature roasting, heavy metals in the sludge and minerals in the shale form a solid solution, so that the solid solution is fixed in grids of aluminosilicate, and the surface of the prepared composite ceramsite is in a compact glazed state, so that heavy metal components in the sludge can be effectively wrapped and solidified; and biomass is used as fuel and can generate a large amount of carbon dioxide in the carbonization process, so that a pore structure is formed, formation of a porous structure of the ceramsite is facilitated, the pelletizing performance is excellent, and the ceramsite has good pelletizing rate, expansion rate and stacking density.
本发明提供一种复合陶粒及其制备方法，所述方法包括以下步骤；将所述淤泥、页岩和粘结剂混合球磨得到混合粉料；将所述混合粉料造粒，得到生料球；预热烘干所述生料球至含水率小于2％；将烘干后的生料球采用生物质焙烧，焙烧结束后冷却得到所述复合陶粒。采用淤泥和页岩为主要原料，生物质为燃料，淤泥经过高温焙烧后，其中的重金属与页岩中的矿物形成固溶体，从而固定在铝硅酸盐的网格中，制备得到的复合陶粒表面为致密的釉化状态，因而可以有效地包裹固化污泥中的重金属组分；以生物质作为燃料，生物质在炭化过程中会产生大量二氧化碳，从而形成孔隙结构，有利于陶粒形成多孔结构，成球性能优异，具有良好的成球率、膨胀率和堆积密度。
Composite ceramsite and preparation method thereof
The invention provides composite ceramsite and a preparation method of the composite ceramsite. The preparation method comprises the following steps: mixing and ball-milling sludge, shale and a binder to obtain mixed powder; granulating the mixed powder to obtain raw material balls; preheating and drying the raw material nodules until the moisture content is less than 2%; and roasting the dried raw material balls by adopting biomass, and conducting cooling after roasting to obtain the composite ceramsite. According to the preparation method, sludge and shale are taken as main raw materials, biomass is taken as a fuel, after the sludge is subjected to high-temperature roasting, heavy metals in the sludge and minerals in the shale form a solid solution, so that the solid solution is fixed in grids of aluminosilicate, and the surface of the prepared composite ceramsite is in a compact glazed state, so that heavy metal components in the sludge can be effectively wrapped and solidified; and biomass is used as fuel and can generate a large amount of carbon dioxide in the carbonization process, so that a pore structure is formed, formation of a porous structure of the ceramsite is facilitated, the pelletizing performance is excellent, and the ceramsite has good pelletizing rate, expansion rate and stacking density.
本发明提供一种复合陶粒及其制备方法，所述方法包括以下步骤；将所述淤泥、页岩和粘结剂混合球磨得到混合粉料；将所述混合粉料造粒，得到生料球；预热烘干所述生料球至含水率小于2％；将烘干后的生料球采用生物质焙烧，焙烧结束后冷却得到所述复合陶粒。采用淤泥和页岩为主要原料，生物质为燃料，淤泥经过高温焙烧后，其中的重金属与页岩中的矿物形成固溶体，从而固定在铝硅酸盐的网格中，制备得到的复合陶粒表面为致密的釉化状态，因而可以有效地包裹固化污泥中的重金属组分；以生物质作为燃料，生物质在炭化过程中会产生大量二氧化碳，从而形成孔隙结构，有利于陶粒形成多孔结构，成球性能优异，具有良好的成球率、膨胀率和堆积密度。
Composite ceramsite and preparation method thereof
一种复合陶粒及其制备方法
FANG HAO (Autor:in) / HUANG LAN (Autor:in) / CHEN LINQIAN (Autor:in) / FEI MINGMING (Autor:in) / LIU LANQI (Autor:in) / DAI LIEWEN (Autor:in) / LI MIN (Autor:in)
21.12.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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