以鹤壁某燃用高硫煤电厂产生的脱硫石膏为原料,通过氯化铵盐溶液溶解脱硫石膏,在石膏浸出滤液中加入氨水,通入模拟电厂烟气制备微纳米CaCO_(3)。在提取过Ca^(2+)的滤液中加入金属氯化物与SO_(4)^(2-)结合,形成微纳米XSO_(4)沉淀。实验...以鹤壁某燃用高硫煤电厂产生的脱硫石膏为原料,通过氯化铵盐溶液溶解脱硫石膏,在石膏浸出滤液中加入氨水,通入模拟电厂烟气制备微纳米CaCO_(3)。在提取过Ca^(2+)的滤液中加入金属氯化物与SO_(4)^(2-)结合,形成微纳米XSO_(4)沉淀。实验结束后,残余液体仍然为氯化铵溶液,且可循环用于下一次浸出。利用XRD和SEM对样品进行测试。结果表明,制备的碳酸钙是球霰石和方解石的混合晶体,晶粒尺寸为微纳米级,纯度近100%;制得的XSO_(4)晶粒尺寸亦为微纳米级,纯度近100%。通过计算,理论上每吨脱硫石膏可以固定135 kg CO_(2),产生307 kg微纳米碳酸钙,制备718 kg微纳米硫酸盐。该研究为电厂烟气不经捕集而直接利用提供了新途径,将减少高额的CO_(2)捕集费用,为脱硫石膏的资源化利用和碳减排提供一种可商业化运行的途径。展开更多
Based on welding thermal simulation on Nb-microaUoyed XSO pipeline stee! using Gleeble-3500 thermal simulation equipment, microstlttcture and impact toughness in coarse grain heat-affected zone （CGHAZ） under differe...Based on welding thermal simulation on Nb-microaUoyed XSO pipeline stee! using Gleeble-3500 thermal simulation equipment, microstlttcture and impact toughness in coarse grain heat-affected zone （CGHAZ） under different welding parameters were investigated in this paper. The results show that high heat inputs with low preheats or low heat inputs with high preheats should be applied to achieve high impact toughness. Coarse original austenite grains may lower impact toughness. CGHAZ microstructure is mostly composed of upper bainite, granular bainite and lath bainite. The phase composition of microstructure and the quantity, size, shape of M/A constituents both have effects on impact toughness.展开更多
文摘以鹤壁某燃用高硫煤电厂产生的脱硫石膏为原料,通过氯化铵盐溶液溶解脱硫石膏,在石膏浸出滤液中加入氨水,通入模拟电厂烟气制备微纳米CaCO_(3)。在提取过Ca^(2+)的滤液中加入金属氯化物与SO_(4)^(2-)结合,形成微纳米XSO_(4)沉淀。实验结束后,残余液体仍然为氯化铵溶液,且可循环用于下一次浸出。利用XRD和SEM对样品进行测试。结果表明,制备的碳酸钙是球霰石和方解石的混合晶体,晶粒尺寸为微纳米级,纯度近100%;制得的XSO_(4)晶粒尺寸亦为微纳米级,纯度近100%。通过计算,理论上每吨脱硫石膏可以固定135 kg CO_(2),产生307 kg微纳米碳酸钙,制备718 kg微纳米硫酸盐。该研究为电厂烟气不经捕集而直接利用提供了新途径,将减少高额的CO_(2)捕集费用,为脱硫石膏的资源化利用和碳减排提供一种可商业化运行的途径。
文摘Based on welding thermal simulation on Nb-microaUoyed XSO pipeline stee! using Gleeble-3500 thermal simulation equipment, microstlttcture and impact toughness in coarse grain heat-affected zone （CGHAZ） under different welding parameters were investigated in this paper. The results show that high heat inputs with low preheats or low heat inputs with high preheats should be applied to achieve high impact toughness. Coarse original austenite grains may lower impact toughness. CGHAZ microstructure is mostly composed of upper bainite, granular bainite and lath bainite. The phase composition of microstructure and the quantity, size, shape of M/A constituents both have effects on impact toughness.
