高硅锌精矿焙烧过程中硅的控制及热平衡计算  

Silicon Control and Heat Balance Calculation in Roasting Process of High Silicon Zinc Sulfide Concentrate

作　　者：张恒星 陈杭 陈芬 陈期生 应宗波 吴星琳 王俊娥 ZHANG Hengxing;CHEN Hang;CHEN Fen;CHEN Qisheng;YING Zongbo;WU Xinglin;WANG Jun′e(Fujian Zijin Precious Metal Materials Co.,Ltd.,Shanghang 364200,China;Zijin Copper Co.,Ltd.,Shanghang 364200,China;Xiamen Zijin Technology of Mining and Metallurgy Ltd.,Xiamen 361115,China)

机构地区：[1]福建紫金贵金属材料有限公司,福建上杭364200 [2]紫金铜业有限公司,福建上杭364200 [3]厦门紫金矿冶技术有限公司,福建厦门361115

出　　处：《有色金属工程》2024年第1期61-66,共6页Nonferrous Metals Engineering

摘　　要：针对高硅锌精矿焙烧过程中焙砂可溶硅高、沸腾炉易结块、浸出固液分离困难等问题,以现场生产焙烧工艺参数为基础,研究了低温和高温焙烧对焙砂中可溶硅含量的影响,并基于MatCal软件对沸腾炉焙烧工艺进行热平衡计算。结果表明:在焙烧条件基本相同的情况下,随着硫化锌精矿焙烧温度的增加,焙砂中的可溶硅也增加。当焙砂中可溶硅高于3.18%会出现浓密机上清液跑混、低浸浓密底流矿浆过滤困难、净液中除杂钴偏高等问题。经MatCal模拟计算后,理论消耗空气50361.328 m 3/h,低温焙烧的平均风量47102.8 m 3/h,高温焙烧平均风量48005.7 m 3/h,实际的焙烧中平均风量偏低,需要增加沸腾炉的风料比。Aiming at the problems of high soluble silicon in calcine,easy agglomeration in fluidized bed boilers and difficult solid-liquid separation in the roasting process of high silicon zinc concentrate.This paper is based on the on-site roasting production process parameters,the effects of low and high temperature roasting on the soluble silicon content in calcine are studied,and the roasting process of fluidized bed boilers is simulated using MatCal software.The results show that under the same roasting conditions,with the increase of roasting temperature,the acid soluble silicon in calcine increases,and the difference of 1.03%was obtained between low-temperature roasting and high-temperature roasting.When the soluble silicon content in calcine is above 3.18%,certain problems will appear,including turbidity of thickener supernatant,the difficult filtration for underflow pulp after low acid leaching,high cobalt content in the impurity removal of purified solution and so on.After MatCal simulation,the theoretical air consumption,the average air volume of low-temperature roasting and the average air volume of high-temperature roasting are 50361.328 m 3/h,47102.8 m 3/h,and 48005.7 m 3/h respectively.However,the average air volume in actual roasting is low,thus it is necessary to raise the air material ratio of the fluidized bed boilers.

关 键 词：硫化锌精矿 沸腾炉 焙烧 热平衡 

分 类 号：TF813[冶金工程—有色金属冶金]