高铁矿物及炉渣中钙镁的测定,一般采用萃取分离法和氨水-过硫酸铵二次沉淀分离法。由于这些分离方法吸附严重,操作繁琐费时,因此,不能满足生产的要求。我们在研究氨水-过硫酸铵沉淀分离法的酸度、介质、温度、时间等因素后,采用了乙酸-苯甲酸铵均匀沉淀分离法。该法操作简便,控制分离酸度严格,准确度高,较好地解 Determination of calcium and magnesium in high-speed iron minerals and slag, the general method of extraction and separation of ammonia - ammonium persulfate secondary precipitation separation. Due to the severe adsorption of these separation methods, tedious and time-consuming operation, therefore, can not meet the production requirements. We studied the ammonia - ammonium persulfate precipitation separation of acidity, media, temperature, time and other factors, the use of acetic acid - ammonium benzoate precipitation method. The method is simple, easy to control the separation of acidity, high accuracy, better solution