CAJ | 학술논문

研究昭通褐煤水分含量对其气力输送的影响，获得了其输送临界水分含量，并从煤粉流动性出发，对临界水分进行了初步解释，得到了初步判别标准。进一步从褐煤水分赋存形态出发，对临界水分问题进行了探讨。结果表明：昭通褐煤全水分约29%时，输送表观气速出现大幅度增大，全水分约30%时无法正常输送，判断其输送临界水分为29%~30%。煤粉流动性测量可为临界水分判别提供初步参考标准。在临界水分附近，煤粉流动性发生区域转变，流动性变差。粒间水是影响煤粉流动和输送的主要水分因素，粒内水对输送的影响很小。虽然褐煤全水分较高，但大量水分以粒内水形式存在，粒间水含量较少。昭通褐煤输送临界水分附近，粒间水含率约为6%，粒间水占粒间空隙体积的比率约为7%。
연구소통갈매수분함량대기기력수송적영향，획득료기수송림계수분함량，병종매분류동성출발，대림계수분진행료초보해석，득도료초보판별표준。진일보종갈매수분부존형태출발，대림계수분문제진행료탐토。결과표명：소통갈매전수분약29%시，수송표관기속출현대폭도증대，전수분약30%시무법정상수송，판단기수송림계수분위29%~30%。매분류동성측량가위림계수분판별제공초보삼고표준。재림계수분부근，매분류동성발생구역전변，류동성변차。립간수시영향매분류동화수송적주요수분인소，립내수대수송적영향흔소。수연갈매전수분교고，단대량수분이립내수형식존재，립간수함량교소。소통갈매수송림계수분부근，립간수함솔약위6%，립간수점립간공극체적적비솔약위7%。
The influence of moisture content on pneumatic conveying of Zhaotong lignite was investigated, and the critical moisture content of pneumatic conveying of Zhaotong lignite was obtained. The flowability and water morphology of lignite coal powder was researched, and the preliminary criterion of critical moisture content was explored. The results indicate that superficial gas velocity substantially increases while Zhaotong lignite is conveyed with a total moisture content reaching about 29 %, and it could not be conveyed when this value reaches about 30%. The critical moisture content of pneumatic conveying of Zhaotong lignite is about 29%~30%. Flowability measurement could provide a preliminary judgement on the critical moisture content. Near the critical moisture, the flowability became worse. Intergranular water was the main factor that affect flowability and pneumatic conveying, intraparticle water had little effect on them. For Zhaotong lignite, the intergranular water content is about 6 %, and the volume ratio of intergranular water to intergranular voidage was about 7%.