褐煤基活性焦的溶解特性实验研究

Study on solubility characteristics of lignite based active coke

分析了实验用褐煤基活性焦灰分的主要组成，考察了活性焦溶于除盐水后，水焦比及停留时间对溶液的pH、电导率、硬度及阴阳离子浓度的影响规律，并对活性焦溶于气化废水的溶解特性进行了定性分析。结果表明，实验用活性焦的空干基灰分含量约26％，其中氧化硅、氧化钙和氧化铝的含量较高；除盐水投加活性焦后，溶液的pH、电导率、硬度及离子含量均增大，溶液中钙离子和硫酸根离子的溶出浓度较大，在水焦比为30：1，停留时间为8．0h时，Ca2＋、SO4浓度分别为194．41，210．5mg／L；在停留时间2．0—8．0h，上述各水质参数随停留时间的变化趋势不明显。

The main ash content of lignite based active coke was determined, and the solubility law was studied in deionized water with different water-coke ratio. The results showed that the ash of active coke sample consisted mainly of Si, A1, Ca, Fe. The pH and conductivity would increase after active coke dos- aged into deionized water, the dissolution of Ca2. and SO42- of the sample was high, they were 194.41, 210.5 mg/L when the water-coke ratio was 30：1 and oscillation time was 8.0 h. There was no significant change of the water quality parameter while the mixing time was 2.0 - 8.0 h.