Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The invention relates to a method for preparing granular artificial pumice stone by taking celadon shale as a raw material. According to the method, the natural celadon shale is taken as an ore raw material and any other reagents are not added, and the method comprises the following steps: 1) crushing the ore raw material to -20mm by adopting a crushing device; 2) sieving crushed ore to obtain a material with the particle size of 3mm-20mm by adopting a sieving device; 3) heating the sieved material to 240 DEG C-800 DEG C by adopting a calcining and heating device and the heating rate of 10 DEG C/min-20 DEG C/min in an air environment, and performing heat preservation for 12-30min; 4) heating the material after preheating and heat preservation to 1050 DEG C-1200 DEG C by adopting the heating rate of 10 DEG C/min-20 DEG C/min in the air environment and performing heat preservation for 15-30min; 5) slowly cooling the calcined and expanded material to below 400 DEG C in the air environment; and 6) sieving the calcined, expanded and cooled material to the particle size of 5mm-25mm by adopting the sieving device, thereby obtaining the granular artificial pumice stone. The method provided by the invention has the advantages of obvious effects, good safety, simple process, easiness in popularization and application, wide range of application and significant social and economic benefits.
The invention relates to a method for preparing granular artificial pumice stone by taking celadon shale as a raw material. According to the method, the natural celadon shale is taken as an ore raw material and any other reagents are not added, and the method comprises the following steps: 1) crushing the ore raw material to -20mm by adopting a crushing device; 2) sieving crushed ore to obtain a material with the particle size of 3mm-20mm by adopting a sieving device; 3) heating the sieved material to 240 DEG C-800 DEG C by adopting a calcining and heating device and the heating rate of 10 DEG C/min-20 DEG C/min in an air environment, and performing heat preservation for 12-30min; 4) heating the material after preheating and heat preservation to 1050 DEG C-1200 DEG C by adopting the heating rate of 10 DEG C/min-20 DEG C/min in the air environment and performing heat preservation for 15-30min; 5) slowly cooling the calcined and expanded material to below 400 DEG C in the air environment; and 6) sieving the calcined, expanded and cooled material to the particle size of 5mm-25mm by adopting the sieving device, thereby obtaining the granular artificial pumice stone. The method provided by the invention has the advantages of obvious effects, good safety, simple process, easiness in popularization and application, wide range of application and significant social and economic benefits.
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