宁夏大学学报（自然科学版）2017，Vol.38Issue(3)：277-282,6.
冷冻煤冻融损伤机理与制浆性能
Freezing-thawing Damage Mechanism of Frozen Coal and the Slurrying Performance
摘要
Abstract
In order to investigate the effect of freezing condition on coal sample's milling efficiency and slurry characteristics,the authors of the article pretreated the coals with three methods:freezing,freezing-unfreezing,and natural freezing to study the influence of freezing time and freezing temperature on the grinding characteristics and did the slurrying experiment and inspected and analyzed the coal sample freezing result with industrial computer tomography and micro examination methods by taking coals from Yangyi coal mine,Red Rock Bay and Bayan Gaoleer as research objects.The result shows that,the grindability index tends to increase after freezing.200 mesh sieve rate can raise 7.29％ under the condition of-20 ℃ and 24 h,and 6.06％ under-20 ℃C and 96 h.The generated coal hole clearance after ice sublimation and coal-water swelling detachment are the main cause of coal sample strength reduction,coal particles increasing,and coal water slurry viscosity rising.The coal sample after freezing treatment can reduce the energy consumption of coal water slurry preparation and improve its slurry character.关键词
冷冻/解冻/断裂强度/研磨效率/冰水相变Key words
freezing/thawing/fracture strength/grinding efficiency/water-ice phase transformation分类
化学化工引用本文复制引用
李和平,马利俊,罗方,胡奇林,刘万毅..冷冻煤冻融损伤机理与制浆性能[J].宁夏大学学报（自然科学版）,2017,38(3):277-282,6.基金项目
国家自然科学基金资助项目(21266025) （21266025）
