摘要近些年氧化铝产量的一直在提高，我国氧化铝行业的压力也在一直增加，铝土矿依靠从国外进口。铝土资源稀缺，再者，我国人口众多，对铝加工制品的需求力度较大，因而未来供不应求的局面越来越大。所以，解决铝土矿资源匮乏，是目前我国目前急需解决的重要资源问题之一，利用高铝粉煤灰来生产氧化铝，能有效缓解中国铝矿资源的不足，对我国加强铝业的发展具有重要意义，本文主要描绘了从高铝粉煤烟中提取氧化铝的主要工艺技术与工程的对比。通过物料衡算对部分设备进行了选型，对沉降槽进行了热损计算，并进行了职业病危害的专项评价。关键词：粉煤灰：氧化铝：化工三算：溶出：职业病abstractIn recent years,the output of alumina has been increasing,and the pressureof alumina industry in China has been increasing.Bauxite depends on importsfrom abroad.Bauxite resources are scarce.Moreover,China has a largepopulation and a large demand for aluminum processing products.Therefore,the situation of short supply in the future is growing.Therefore,to solvethe shortage of bauxite resources is one of the important resource problemsurgently needed to be solved in our country at present.Using high aluminafly ash to produce alumina can effectively alleviate the shortage of China'saluminum resources,which is of great significance to the development ofChina's aluminum industry.This paper mainly describes the comparison betweenthe main technology and engineering of extracting alumina from high aluminafly ash.Through material balance calculation,some equipment was selected,heat loss of settlement tank was calculated,and special evaluation ofoccupational hazards was carried out.Key words:fly ash;alumina;chemical calculation;dissolution;occupational disease2目录一、综述1.1各工艺对比…1.1.3、酸碱联合法1.1.4、碱法工艺对比评价二、厂址选择.92.1厂址选择原则92.2气候水文102.3厂址优势.102.3.1区位优势…102.3.2位置优势102.3.3资源优势102.3.4水源优势.www...m10三.工艺说明123.1溶出工艺123.1.1主要反映123.1.2说明…123.1.3铝酸钠…123.1.4铁酸钠.…123.1.5铁酸钙…123.2主要二次反应133.2.1反应式133.2.2抑制二次反应损失13四、物料衡算….154.1原始数据154.2物料计算154.2.1二次反应…15五、沉降槽热量平衡计算…16