煤气化渣烧结制品的烧成制度研究  

Research on firing system of coal gasification slag sintered products

作　　者：牛国峰 刘芳[2,3] 贾晓林[2,3] Niu Guofeng;Liu Fang;Jia Xiaolin(College of Sciences,Inner Mongolia University of Science and Technology,Baotou 014010,Inner Mongolia,China;不详)

机构地区：[1]内蒙古科技大学理学院,内蒙古包头014010 [2]内蒙古科技大学白云鄂博共伴生矿废弃物资源综合利用国家地方联合工程研究中心,内蒙古包头014010 [3]内蒙古科技大学白云鄂博矿多金属资源综合利用重点实验室,内蒙古包头014010

出　　处：《耐火材料》2022年第1期61-64,共4页Refractories

基　　金：内蒙古自治区科技成果转化项目(CGZH2018153)。

摘　　要：以煤气化渣为主要原料制备烧结制品,通过干混料的综合差热分析和样坯的烧成收缩预试验,再根据以往经验,选取升温速率(A)、烧成温度(B)和保温时间(C)三个因素,并分别选取2、3、4℃·min^(-1),1100、1150和1200℃,2、4、6 h为因素水平,选取烧结制品的体积密度、吸水率、耐压强度和热导率为评价指标,按正交表L_(9)(3^(3))安排试验。结果表明:1)烧成制度各因素对烧结制品的耐压强度、体积密度和吸水率影响程度的大小顺序均为烧成温度>保温时间>升温速率,对热导率影响程度的大小顺序为烧成温度>升温速率>保温时间。2)经综合平衡考虑,最优试验方案为:升温速率2℃·min^(-1),烧成温度1200℃,保温时间6 h。所得试样的体积密度为1.84 g·cm^(-3),耐压强度为112 MPa,吸水率为1.44%,热导率为1.239 W·m^(-1)·K^(-1)。Sintered products were prepared using coal gasification slag as the main raw material.Based on the comprehensive differential thermal analysis of dry mixture and the firing shrinkage pre-tests of green bodies as well as experience,the experiment was conducted according to orthogonal table L_(9)(3^(3)),selecting the heating rate,the firing temperature,and the holding time as factors,2,3,and 4℃·min^(-1),1100,1150,and 1200℃as well as 2,4,and 6 h as the corresponding levels,while the bulk density,the water absorption,the compressive strength and the thermal conductivity as evaluation indexes.The results show that:(1)the order of the influence degree of the firing system factors on the compressive strength,the bulk density and the water absorption of the sintered products is the firing temperature>the holding time>the heating rate,and that for the thermal conductivity is the firing temperature>the heating rate>the holding time;(2)generally,the optimal firing system is the heating rate of 2℃·min^(-1),the firing temperature of 1200℃,and the holding time of 6 h,and the prepared sample has the bulk density of 1.84 g·cm^(-3),the compressive strength of 112 MPa,the water absorption of 1.44%,and the thermal conductivity of 1.239 W·m^(-1)·K^(-1).

关 键 词：煤气化渣 烧结制品 正交表 烧成制度 

分 类 号：TQ175[化学工程—硅酸盐工业]