Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for preparing ceramsite by using chromium-containing sludge
The invention provides a method for preparing ceramsite by using chromium-containing sludge, which comprises the following steps: uniformly mixing chromium-containing sludge, divalent metal oxide and clay to obtain a mixture; adding water into the mixture, granulating and forming, and then drying at 100 DEG C for 2 hours to obtain raw material balls; performing high-temperature calcination on the raw material balls, and cooling to room temperature after calcination to obtain the ceramsite. According to the ceramsite prepared by the method, chromium can be completely fixed and wrapped, and the leaching results of Cr (VI) and total chromium in the ceramsite product completely meet the related national standard requirements; the chromium-containing sludge, the divalent metal oxide and the clay are used as raw materials, and safe disposal and resource utilization of hazardous waste and solid waste can be achieved. In addition, the chromium-containing sludge is used as the raw material, so that the consumption of the raw material for preparing the ceramic particles is reduced to a certain extent. The sustainable development strategy is met, and the requirement for saving energy is met.
本发明提供了一种利用含铬污泥制备陶粒的方法，步骤包括：将含铬污泥、二价金属氧化物和黏土均匀混合，得到混合物；将混合物加水造粒成型，之后于100℃干燥2h，得到生料球；将生料球进行高温煅烧，煅烧后降至室温，得到陶粒。本发明制备获得的陶粒能够达到对铬的完全固定、包裹，陶粒产品中Cr(VI)、总铬浸出结果完全满足相关国标要求；本发明以含铬污泥及二价金属氧化物、黏土为原料，可实现危险废物及固体废物的安全处置与资源化利用。另外，本方法将含铬污泥作为原材料，一定程度上减少了制陶粒原材料的消耗。符合可持续发展战略，达到节约能源的要求。
Method for preparing ceramsite by using chromium-containing sludge
The invention provides a method for preparing ceramsite by using chromium-containing sludge, which comprises the following steps: uniformly mixing chromium-containing sludge, divalent metal oxide and clay to obtain a mixture; adding water into the mixture, granulating and forming, and then drying at 100 DEG C for 2 hours to obtain raw material balls; performing high-temperature calcination on the raw material balls, and cooling to room temperature after calcination to obtain the ceramsite. According to the ceramsite prepared by the method, chromium can be completely fixed and wrapped, and the leaching results of Cr (VI) and total chromium in the ceramsite product completely meet the related national standard requirements; the chromium-containing sludge, the divalent metal oxide and the clay are used as raw materials, and safe disposal and resource utilization of hazardous waste and solid waste can be achieved. In addition, the chromium-containing sludge is used as the raw material, so that the consumption of the raw material for preparing the ceramic particles is reduced to a certain extent. The sustainable development strategy is met, and the requirement for saving energy is met.
本发明提供了一种利用含铬污泥制备陶粒的方法，步骤包括：将含铬污泥、二价金属氧化物和黏土均匀混合，得到混合物；将混合物加水造粒成型，之后于100℃干燥2h，得到生料球；将生料球进行高温煅烧，煅烧后降至室温，得到陶粒。本发明制备获得的陶粒能够达到对铬的完全固定、包裹，陶粒产品中Cr(VI)、总铬浸出结果完全满足相关国标要求；本发明以含铬污泥及二价金属氧化物、黏土为原料，可实现危险废物及固体废物的安全处置与资源化利用。另外，本方法将含铬污泥作为原材料，一定程度上减少了制陶粒原材料的消耗。符合可持续发展战略，达到节约能源的要求。
Method for preparing ceramsite by using chromium-containing sludge
一种利用含铬污泥制备陶粒的方法
LYU SHUXIANG (Autor:in) / GUO YUCHEN (Autor:in) / LI ZHEN (Autor:in) / CHANG QIAN (Autor:in) / JIANG JINYANG (Autor:in)
29.04.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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