文档介绍：从电石渣中回收氧化钙的工艺研究与生产实践
田伟军1 ,赖乃斌2
(1 湖南化工职业技术学院湖南株洲 412004;2 中盐湖南株洲化工集团湖南株洲 412004 )
摘要:研究了以电石渣为原料回收氧化钙的工艺,主要过程包括:原料预处理、杂质分离、电石渣煅烧分解等。重点考察了除杂及煅烧工艺条件,结果表明:采用水力旋流除杂工艺,,在900℃的温度下煅烧5h,得到的氧化钙产品含量可达到 85%以上。应用该工艺建成了一套10000t/a的生产装置,氧化钙出料和装置尾气采用微负压操作,解决了粉尘污染问题,以水煤浆为燃料并充分利用尾气余热降低了能耗。采用回转窑煅烧,设备结构简单、生产过程控制方便可靠、处理能力大、自动化程度高。
关键词电石渣;回收;氧化钙;生产
Process research and production practice of recovering calcium oxide from carbide slag
Tian Wei-jun1,Lai Nai-bin2
(1 Hunan Chemical Vocational and Technical College HuNan Zhuzhou 412004;
2 China Salt Industry Group, Hunan Zhuzhou Chemical Industry Group HuNan Zhuzhou 412004)
Abstract :This paper studied the carbide slag as raw material recovery process calcium oxide, the main process includes: pre-processing of raw materials, impurity separation, position of carbide slag calcined. It inspected the impurity and the calcination process conditions, results showed that: the hydrocyclone impurity removal process, control the flow rate of / s detachable carbide slag in the mechanical impurities, the temperature at 900 ℃ calcined 5h, calcium oxide obtained product content can reach 85% or more, the application of the process into a set of 10000t / a of the production plant. Device operational status showed: calcium oxide materials and devices out of micro-negative pressure operation to solve the problem of dust pollution