The problems in controlling upper size and lower size of feed into an air solid fluidized bed were discussed, and then an air classification technology of moist raw coal was introduced.
讨论了空气重介流化床分选对入料粒度上下限的控制方法和存在问题，介绍了潮湿原煤空气分级新方法。
With the raw material of gas coal and weakly caking coal-char, a set of formed cokes were prepared by changing the size of gas coal and weakly caking coal-char.
以气煤和弱粘煤半焦为原料，通过改变气煤和弱粘结煤半焦的粒度制备出一系列的型焦。
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