半焦制备气化水煤浆试验研究

Experimental study on preparation of gasification coal water mixture with char

为提高半焦的成浆浓度,以半焦与褐煤为原料,采用传统工艺,分级研磨工艺和间断级配工艺进行成浆性试验,并进行了半焦与褐煤的配煤制浆试验。结果表明,半焦和褐煤在传统工艺下的最高成浆浓度分别为55.58%、47.38%。采用分级研磨制浆工艺,在粗细粉质量比为85∶15的条件下,半焦和褐煤的最高成浆浓度分别为58.13%、51.59%。采用间断级配制浆工艺,对半焦和褐煤以7∶3进行配煤制浆试验,在半焦的粗细粉质量比为6∶4条件下,配煤制浆的最高成浆浓度为61.36%,浓度满足设计要求,所制煤浆的流动性和稳定性都明显变好。

To increase the mixture concentration of char, the coal water mixture for gasification was prepared using char and lignite as raw materials. The slurry characteristics were tested by means of traditional process, classified grinding and gap-graded process. The results show that the highest concentration of char and lignite are 55.58% and 47.38% respectively prepared by traditional process. The highest concentration of char and lignite are 58.13% and 51.59% respectively of slurry prepared by classified grinding process with a thickness ratio of 85 to 15. As well, the highest concentration is 61.36% prepared by gap-graded process with mass ratio of char and lignite of 7 to 3 and char thickness ratio of 6 to 4. It meets the design requirements that improves fluidity and stability obviously.