型煤原料粒度、配煤/灰比和助剂对煤灰熔融特性的影响  

Effects of particle size,fusing agent and coal/ash ratio on fusion characteristics of briquettes

作　　者：景瑞军[1] 张永发[1] 

机构地区：[1]太原理工大学煤科学与技术教育部和山西省重点实验室,山西太原030024

出　　处：《热力发电》2014年第7期45-49,共5页Thermal Power Generation

基　　金：国家自然科学基金(51274147);国家科技支撑计划(2012BAA04B03)

摘　　要：研究了型煤原料粒度、助剂及配煤对型煤灰熔融特性的影响.结果表明，原料粒度大于3．2 mm的型煤灰熔融温度高于粒度小于3．2 mm 型煤灰熔融温度；型煤中的低灰熔点煤含量在90％～98％之间时，其煤灰流动温度可降至1350℃以下；2种高灰熔点煤中 CaO 添加量分别在8．09％～10．92％和5．01％～8．07％之间时，其煤灰流动温度可降至1350℃以下；Fe2O3的添加量分别大于9．26％和4．95％时，其煤灰流动温度可降至1350℃以下；MgO对煤灰流动温度的降低效果不明显；灰中化学组成间反应生成低温共熔物是温度降低的主要原因.The effects of raw material particle size,fusing agent addition （CaO,Fe2O3 and MgO）and coal blending ratio on ash fusion characteristics were experimentally studied.The results show that,the ash fusion temperature of briquette with raw material particle size larger than 3.2 mm was significantly higher than that with particle size less than 3 .2 mm.The ash fluid point of the briquette can decrease to lower than 1 350 ℃ when （1）the low melting point coal occupied 90% to 98% of the briquettes;（2）the proportion of CaO was 8.09% to 10.92% and 5.01% to 8.07% in the two high ash fusion temperature coals;（3） the addition of Fe2O3 was larger than 9.26% and 4.95%.MgO had little effect on reducing the ash fluid point.The low-melting-point eutectic mixtures formed by reactions between the compounds in ash mainly caused the drop in ash fluid point.

关 键 词：型煤 粒度 灰熔融特性 灰溶点 煤灰流动温度 助剂 

分 类 号：TQ534.2[化学工程—煤化学工程]