球磨机制备石灰乳装置技术改进

Technical improvement on preparation of lime milk by ball mill

云天化国际化工股份有限公司三环分公司石灰乳制备,采用球磨机球磨湿试工艺制备,2007年建成投入运行,生产过程中发现灰乳中渣子粒径大,灰乳在储存、输送中粒径大的渣子易沉集,导致储槽搅拌装置桨叶常常被渣子掩埋卡死,灰乳输送中管道堵塞严重,给生产管理、工艺操作带来一定困难。针对存在问题,组织开展技术攻关工作,改进工艺流程,增设灰乳分级设备,优化磨机钢球级配,加强原料生石灰质量的管控等技术措施。措施实施后,球磨制备石灰乳质量得到明显改善,灰乳中粒径小于75μm的渣子质量分数达90%,原料生石灰利用率得到很大提高,生产中基本无废渣排放,较好地解决了存在的问题。

Preparation of lime milk in Sanhuan Branch of Yuntianhua International Chemical Co.,Ltd.adopted wet ball milling process.Plant was built and put into operation in 2007.In production process,it was found the particle size of slags in lime milk was large and large sized slags were easy to deposit in storage and transportation resulting in the blades of blender were buried and locked,pipes were congested in transportation,and process operation was difficult to carry out.In allusion to the existing problems,many technical measures,such as organizing to tackle pivotal technological problems,improving of process flow,adding lime milk grading equipment,optimizing size distribution of grinding balls,and strengthening quality management and control of quicklime.After implementation of those above measures,quality of lime milk prepared by ball milling was improved apparently;mass fraction of slags whose grain size less than 75 μm in lime milk reached 90% and utilization rate of quicklime raw material was also greatly increased;and there nearly was no waste residue discharged and the existing problems were solved well.