Extracting calcium solution with reduced impurities from by-pass dust, cement manufacturing waste product involves washing dust in water and dissolving in concentrated acid under heat, adding alkali to generate precipitate, and separating calcium solution with reduced impurities
	RAJ N E; GOYAL R; KUCHYA M K; KRISHNAMOORTHY S
	2023-07-21
专利权人	ULTRATECH CEMENT LTD (ULTR-Non-standard)
申请日期	2023-07-21
专利号	IN202321049161-A
成果简介	NOVELTY - Method for extracting a calcium solution with reduced impurities from by-pass dust (BPD), a cement manufacturing waste product involves (i) washing the BPD in water and dissolving in concentrated acid under heat; (ii) adding an alkali to generate a precipitate comprises silicon Si, aluminum Al and iron Fe impurities; and (iii) separating from the precipitate a filtrate being the calcium solution with reduced impurities. USE - Extracting calcium solution with reduced impurities from by-pass dust, cement manufacturing waste product. ADVANTAGE - The filtrate may be used for various applications and may be treated further to obtain a value added calcium product including but not limited to dicalcium phosphate, calcium carbonate, calcium ammonium nitrate or any other calcium derivative. The method is a method for reutilization of BPD to obtain a calcium containing filtrate solution with reduced impurities. The filtrate may be further treated to obtain dicalcium phosphate or calcium carbonate. The method addresses the environmental disadvantage of disposal of the vast quantities of by pass dust that is regularly produced as waste in cement plants by enabling its reutilization.
IPC 分类号	A23K-020/24 ; A23L-029/256 ; C02F-001/00 ; C05C-001/00 ; C05C-001/02
国家	印度
专业领域	化学化工
语种	英语
成果类型	专利
文献类型	科技成果
条目标识符	http://119.78.100.226:8889/handle/3KE4DYBR/21188
专题	中国科学院新疆生态与地理研究所
作者单位	ULTRATECH CEMENT LTD (ULTR-Non-standard)
推荐引用方式 GB/T 7714	RAJ N E,GOYAL R,KUCHYA M K,et al. Extracting calcium solution with reduced impurities from by-pass dust, cement manufacturing waste product involves washing dust in water and dissolving in concentrated acid under heat, adding alkali to generate precipitate, and separating calcium solution with reduced impurities. IN202321049161-A[P]. 2023.

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