【摘要】 以半焦掺混原煤为试验对象,在添加少量的氧化钙时,其灰熔点变化比较明显,呈下降趋势,随着氧化钙添加比例的增加,灰分的熔点降低程度呈现平缓,当氧化钙的比例进一步增加时,熔点不再下降,反而呈现略有上升的现象,由于氧化钙与灰中的其他组分反应生成低熔点化合物,当氧化钙含量进一步增加时,此时会呈现氧化钙过剩,由于其本身为高熔点物质,进而导致样品的熔点略有提高;还原性气氛能够明显降低半焦混煤灰的熔点,因此局部缺氧,会导致炉膛内结渣严重化;大粒径化学组成均匀性比小粒径的灰分差,在高温下,各组分不能充分接触反应,会形成一些灰熔点较低的共熔物,从而降低灰分熔点。更多还原

【Abstract】 Take semi-coke mixing raw coal as test object, adding a small amount of calcium oxide, the ash fusion point decline obviously. With the increase of calcium adding ratio, extend of the capacity of present flat. As the ratio of calcium increased further, ash fusion point will be changed no longer. A small quantity of calcium reacts with other components to form low melting point chemical compound. When the surplus of calcium, ash fusion point will increase. A reductive atmosphere reduce ash fusion point of sample, the furnace will be slagged with lack of oxygen. The uniformity of chemical composition of large particle size is worse than that of small particle size. At high temperature, the components cannot fully contact and react, and some materials with low ash melting point will be formed, thereby reducing the ash melting point.更多还原