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关于寒冷地区煤炭运输设备上煤的冻粘问题,为研究煤粒度和冻粘基体表面波纹度对煤冻粘强度的影响规律及原因,选取5种不同粒度煤样和5种不同表面波纹度的钢板分别组合做冻粘强度试验。结果表明:(1)随着煤粒径d减小,任一波纹度钢板上煤冻粘强度均增加。粒度越小煤冻粘界面越致密,钢板表面对煤颗粒吸附作用也越强,则冻粘强度越大;粒度大反之。(2)随着钢板波纹度参数Wsm和Wc值逐渐增加,较小粒度的煤冻粘强度明显增加,较大粒度的煤冻粘强度无明显增减趋势,中等粒度煤冻粘强度先无明显变化,然后逐渐增加。当dWsm时,煤颗粒难以进入波谷中,不同波纹度钢板对其吸附作用差别不大,冻粘强度无明显增减趋势。
In order to study the rules and reasons of coal particle size and surface waviness of frozen and bonded substrates on the coal freezing and adhesion problems of coal transportation equipment in cold areas, five kinds of coal samples with different grain sizes and five different surface waviness Plate were combined to do freeze-strength test. The results show that: (1) As coal particle size d decreases, the cohesive strength of coal on any waviness steel increases. The smaller the particle size, the more dense the interface of the frozen clay, the stronger the adsorption of coal particles on the steel surface, the greater the strength of the frozen and viscous; the larger the particle size. (2) With the Wsm and Wc values of steel waviness increasing gradually, the cohesion strength of coal with smaller particle size increased obviously, the cohesive strength of coal with larger particle size had no obvious increase and decrease trend, Change, and then gradually increase. When d Wsm, Coal particles difficult to enter the trough, different corrugated steel plate adsorption little difference between them, no significant increase in the trend of freezing and thawing.