Dielectric properties and temperature increase characteristics of zinc oxide dust from fuming furnace  

烟化炉产氧化锌烟尘的介电特性及温升特性(英文)

作　　者：张利波[1,2,3,4] 马爱元[1,2,3,4] 刘晨辉[1,2,3,4] 曲雯雯[1,2,3,4] 彭金辉[1,2,3,4] 罗永光[1,2,3,4,5] 左勇刚[1,2,3,4] 

机构地区：[1]云南省特种冶金重点实验室,昆明650093 [2]微波能工程应用及装备技术国家地方联合工程实验室,昆明650093 [3]非常规冶金教育部重点实验室,昆明650093 [4]昆明理工大学冶金与能源工程学院,昆明650093 [5]云南驰宏锌锗股份有限公司,曲靖655011

出　　处：《Transactions of Nonferrous Metals Society of China》2014年第12期4004-4011,共8页中国有色金属学报（英文版）

基　　金：Project(51104073)supported by the National Natural Science Foundation of China;Project(2014CB643404)supported by the National Basic Research Program of China;Project(2013AA064003)supported by the Hi-tech Research and Development Program of China;Project(2012HB008)supported by the Yunnan Provincial Young Academic Technology Leader Reserve Talents,China

摘　　要：Cavity perturbation method was used to determine the dielectric properties （ε′,ε″, and tanδ） of zinc oxide dust in different apparent densities. The process was conducted to study the microwave-absorption properties of zinc oxide dust and the feasibility of microwave roasting zinc oxide dust to remove fluorine and chlorine. The dielectric constant, dielectric loss, and loss tangent were proportional to the apparent density of zinc oxide dust. The effects of sample mass and microwave power on the temperature increase characteristics under the microwave field were also studied. The results show that the apparent heating rate of the zinc oxide dust increases with the increase in microwave roasting power and decreases with the increase in the sample mass. The temperature of the samples reaches approximately 800 ＆#176;C after microwave treatment for 8 min, which indicates that the zinc oxide dust has strong microwave-absorption ability.为了研究微波焙烧脱除氧化锌烟尘中氟氯的可行性以及氧化锌烟尘的吸波特性,采用谐振腔微扰法对不同物料密度氧化锌烟尘的介电特性(ε′,ε″和tanδ)进行测定。氧化锌烟尘的介电常数、介电损耗和损耗角正切值与氧化锌烟尘的表观密度成正比。在微波场下研究物料质量和微波功率对氧化锌烟尘升温特性的影响。结果表明,氧化锌烟尘对微波具有较强的吸波能力,其表观升温速率与微波焙烧功率成正比,与质量成反比,在8 min内温度可到达800°C。

关 键 词：zinc oxide dust apparent density dielectric properties microwave heating temperature increase characteristics 

分 类 号：X701[环境科学与工程—环境工程]