Aiming at the practical problem of toxic gases generated in the process of cemented backfill with phosphorus waste (phosphogypsum as aggregate and yellow phosphorus slag as the binder), sources and dynamics of gas generation and the method of gas inhibition were investigated by monitoring the gas generated in the aggregate, the binder and the cemented slurry stirring process. The main findings proved that the gases were mainly generated from the binder in an acidic circumstance, and the gas generation sequence is PCl₃, PH₃, NO, H₂S, NH₃, and CO. Furthermore, lowering the pH value of the cemented slurry would increase the gas yield. The original gas yield of the slurry without acid addition was only 6.3% of the maximum gas yield after acid addition. By analyzing the circumstances of gas generation, a method of directly adding alkaline CaO to the slurry to control the gas generation was proposed. The addition of 12 wt% CaO was noted to reduce the gas yield by 99%. When the pH of the backfill slurry reached 10, the gas generation could be controlled. The results have implications for ensuring the health of mining workers and decreasing environmental pollution.

【摘要】：针对含磷废料(磷石膏为集料,黄磷渣为结合剂)胶结充填过程中产生有毒气体的实际问题,通过对产生气体的监测,研究了产生气体的来源、动态和抑制气体的方法。在骨料、结合剂和水泥浆的搅拌过程中。主要研究结果证明，这些气体主要是在酸性环境下由粘结剂产生的，气体产生顺序为PCl ₃、PH ₃、NO、H ₂ S、NH ₃, 和 CO。此外, 降低水泥浆的 pH 值会增加气体产量。未加酸浆料的原始产气量仅为加酸后最大产气量的6.3%。通过分析产气情况，提出了在浆料中直接添加碱性CaO来控制产气的方法。注意到添加 12 wt% CaO 会使气体产率降低 99%。当回填泥浆的pH值达到10时，可以控制气体的产生。结果对确保采矿工人的健康和减少环境污染具有重要意义。