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在对粉煤灰中炭粒理化性质研究的基础上．论述了粉煤灰湿法选炭的基本原理，给出了单元浮选试验、正交试验和分级浮选试验的结果，证明采用浮选法能够从粉煤灰中分选出一定质量的精炭。
On the basis of the physical and chemical properties of carbon particles in fly ash. The basic principle of wet coal-charcoal selection is discussed. The results of unit flotation test, orthogonal test and grading flotation test are given. It is proved that the flotation method can separate a certain amount of fine carbon.