【摘要】 在 HCl浓度为 0 .0 %～ 2 .0 %的溶灰条件下 ,测定了灰浆的 p H值和溶出的 Ca2 +浓度的经时变化。结果表明 :粉煤灰中活性 Ca O的溶出速度比较缓慢 ;灰颗粒的解体为吸热过程 ,这一过程是活性 Ca O溶出的控制步骤 ;在灰水比为 1∶ 6、温度 5 5℃、溶灰时间 12 0 min,自溶和 1.0 % HCl助溶的条件下 ,活性 Ca O溶出率分别为 2 3.7%和 81.5 % ;在线酸洗灰管应错过排灰高峰 ,投药时间宜安排在 Ca CO3 析出高峰之后更多还原

【Abstract】 The changes of pH of ash water and stripping Ca~2+ concentration with time were determined when the concentrations of HCl were from 0.0% to 2.0%. The results showed that The stripping rate of active CaO in fly ash was very low; Disintegrating of ash particles is an endothermic process and, in fact, this process is a step to strip active CaO. Under the conditions of the ratio of water to ash at six; temperature at 55℃; time of dissolving ash being 130 min, the stripping rates of active CaO were 22% and 75% respectively for the dissolving by itself and assistantly dissolving with 0.1% HCl solution.更多还原