A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
THE METHOD OF NEUTRALIZATION PHOSPHO-GYPSUM USING FLUIDIZED BED BOILER FLY ASH AND USE THEREOF
Disclosed is a manufacturing method of a cement setting retarder using fly ash from a fluidized bed boiler. According to the present invention, the manufacturing method of a cement setting retarder comprises the following steps of: preparing phosphogypsum, as a starting material, having pH of 4.0 at most generated in a process of extracting phosphoric acid; and neutralizing the phosphogypsum to have pH of at least 7.0 by mixing the phosphogypsum with fly ash obtained from circulating fluidized bed boiler. According to the present invention, neutralized phosphogypsum applicable as a cement setting retarder can be obtained. Through the present invention, discarded or stowed resources can be usefully used to resolve problems of waste and stowage, and can be reused.
유동층 보일러 비산회를 활용한시멘트 응결 지연제의 제조 방법이 개시된다. 본 발명은, 인산 추출 공정에서 발생하는 pH 4.0이하의 인산석고를 출발물질로서 준비하는 단계; 및 상기 인산석고에 순환유동층 보일러 비산회를 혼합하여 상기 인산석고를 pH 7 이상으로 중화하는 단계를 포함한다. 본 발명에 따르면, 시멘트 응결지연제로 사용 가능한 인산중화석고를 얻을 수 있으며, 이를 통해 폐기되거나 적치되어 있는 자원을 유용하게 활용하여 폐기나 적치의 문제를 해결하고 자원으로 재활용할 수 있게 된다.
THE METHOD OF NEUTRALIZATION PHOSPHO-GYPSUM USING FLUIDIZED BED BOILER FLY ASH AND USE THEREOF
Disclosed is a manufacturing method of a cement setting retarder using fly ash from a fluidized bed boiler. According to the present invention, the manufacturing method of a cement setting retarder comprises the following steps of: preparing phosphogypsum, as a starting material, having pH of 4.0 at most generated in a process of extracting phosphoric acid; and neutralizing the phosphogypsum to have pH of at least 7.0 by mixing the phosphogypsum with fly ash obtained from circulating fluidized bed boiler. According to the present invention, neutralized phosphogypsum applicable as a cement setting retarder can be obtained. Through the present invention, discarded or stowed resources can be usefully used to resolve problems of waste and stowage, and can be reused.
유동층 보일러 비산회를 활용한시멘트 응결 지연제의 제조 방법이 개시된다. 본 발명은, 인산 추출 공정에서 발생하는 pH 4.0이하의 인산석고를 출발물질로서 준비하는 단계; 및 상기 인산석고에 순환유동층 보일러 비산회를 혼합하여 상기 인산석고를 pH 7 이상으로 중화하는 단계를 포함한다. 본 발명에 따르면, 시멘트 응결지연제로 사용 가능한 인산중화석고를 얻을 수 있으며, 이를 통해 폐기되거나 적치되어 있는 자원을 유용하게 활용하여 폐기나 적치의 문제를 해결하고 자원으로 재활용할 수 있게 된다.
THE METHOD OF NEUTRALIZATION PHOSPHO-GYPSUM USING FLUIDIZED BED BOILER FLY ASH AND USE THEREOF
유동층 보일러 비산회를 활용한 인산석고 중화 방법 그의 활용
KIM BYEONG KWON (author) / KIM WON SEOK (author)
2016-09-20
Patent
Electronic Resource
Korean
IPC:
C04B
Kalk
,
LIME
The method of neutralization phospho-gypsum using Fluidized bed boiler Fly ash and use thereof
European Patent Office | 2018
Manufacturing method of Gypsum for Cement using Phospho-gypsum
European Patent Office | 2019
Manufacturing method of Gypsum for Cement using Phospho-gypsum
| European Patent Office | 2019
non-sintering artificial aggregate composition using phospho-gypsum and manufacturing method thereof
| European Patent Office | 2024
Method for preparing gypsum clinker by utilization of fly ash in circulating fluidized bed boiler
| European Patent Office | 2015