CAJ | 학술논문

煤中钾的存在形式与煤的灰污性质密切相关。通过萃取的方法，分别以水、醋酸铵和稀盐酸为萃取液对钾在我国一些煤中的存在形式进行了研究。结果显示，煤中钾除了以硅铝酸盐形式存在外，还有其它多种存在形式。尤其在低阶煤中，其它形式的钾占有显著份额。钾在煤中存在形式与煤种、煤阶、煤的显微组分和煤粒径有关。
매중갑적존재형식여매적회오성질밀절상관。통과췌취적방법，분별이수、작산안화희염산위췌취액대갑재아국일사매중적존재형식진행료연구。결과현시，매중갑제료이규려산염형식존재외，환유기타다충존재형식。우기재저계매중，기타형식적갑점유현저빈액。갑재매중존재형식여매충、매계、매적현미조분화매립경유관。
The presence of potassium in coals contributes significantly to corrosion of heat exchangers in boilers and turbine materials in PEBC.The modes of occurrence of potassium in coals were investigated by sequential extraction p rocedures with distilled water,1 mol/L ammonium acetate and 1 mol/L hydrochloric acid in turn.The sequential extraction tests were carried out with 10 samples o f coal in different ranks and particle sizes.Petrographic and proximate analyses were also proceeded at the same time.The results showed that although insoluble potassium preponderated in most coals,other modes of occurrence also existed re spectably,especially in low rank coals.More water-soluble and ammonium acetate -soluble potassium were found in rich initinite coals,and more hydrochloric-s o luble potassium in rich vitrinite coals.It could also be noticed that the amount s of the four modes of occrrence of potassium varied inconsistently with the par ticle sizes and the amount of insoluble potassium dispersed distinctly in ash th e ashes.