摘要
利用高温钼丝烧结点仪记录准东和神华2种煤灰在奥氏体钢和涂镍钢表面的熔融形态及接触角变化,分析煤灰的熔融特性和在材料表面的粘附特性。结果表明：准东煤灰的初始烧结温度（770℃）较低,半熔融态灰渣量（24%）较大,说明高碱煤更易沾污;1 200℃~1 280℃内,准东煤灰在涂镍钢表面的接触角比奥氏体钢大8.5°以上,该温度区间内涂镍钢可有效减弱高碱煤结渣;1 150℃~1 190℃内,准东煤灰在涂镍钢表面的粘附功增长缓慢,涂镍钢对该温度区间内的高碱煤结渣有减弱作用。
In order to get more clearly information of coal ash melting characteristics and the wettability on material surfaces,the column and contact angle changes of Zhundong and Shenghua coal ash were studied by high temperature molybdenum wire electric heating furnace. The results showed that the initial sintering temperature（ 770 ℃） of Zhundong ash was lower and its semi molten slag quantity was 24%. 1 200 ℃ ~ 1 280 ℃,the contact angle above the nickel plated steel is 8. 5°bigger than austenitic steel,so nickel steel can effectively reduce Zhundong coal slagging. 1 150 ℃~ 1 190 ℃,the adhesion work of nickel palted steel rised slowly,so in this temperature interval the nickel plated steel can reduce Zhundong coal slagging.
出处
《锅炉技术》
北大核心
2015年第2期6-10,共5页
Boiler Technology
基金
国家自然科学基金项目(51276212)
关键词
高碱煤
煤灰
涂镍
粘附
high alkali coal
ash
nickel
deposition
