冶金石灰竖炉出灰系统的技术分析

概述了传统的石灰竖炉出灰系统的结构及应用现状 ,分析了其存在的问题 ,并介绍了一种新型的由双圆盘与三段阀组成的出灰系统的结构与性能 ,根据国内推广应用情况 ,指出了双圆盘出灰机与三段阀是较为科学的石灰竖炉出灰设备     

燃料油在隧道窑上的应用探讨

隧道窑由于燃用重油造成生产成本升高，为此探讨采用煤焦油沥青配制的燃料油替代重油燃烧。通过调节燃料油的温度和加入蒽油的比例解决了其粘度过大造成燃烧不完全的问题；同时改进烧嘴结构，使雾化效果更好，燃烧更加完全。试验证明，隧道窑燃用燃料油经济可行。     

NS-A型分解炉系统冷模试验结果与分析

利用NS—A型分解炉十分之一的冷态模型测试了炉、窑两路气的管道阻力特性，分解炉内的流场及物料停留时间．测试说明：1要注意调节炉、窑两路气的管道阻力．以满足需要的流量分配；2分解炉内气体流动几乎是平推流，返混小．固气停留时间比较小，要使燃料充分燃烧，必须考虑足够大的炉容；3由于炉内物料有分层现象．减小了分解炉的有效容积，因此设计分解炉要尽量避免该种现象发生．     

回转窑新型支承结构的力学性能分析及设计

这里针对回转窑筒体在运转时发生持续下滑,,引起系统频发故障,造成停机的问题,分析论证了窑体下滑力产生的根本原因及消除方法;在理论分析的基础上,设计了消除下滑力的新型支承结构,给出了结构参数的计算方法以及不同斜度回转窑的设计参数值;探讨了新型结构设计应用中的关键问题。     

高放废液煅烧工艺的研究现状

高放废液安全有效的处理与处置是世界各国关注的重要课题。常采用煅烧技术对高放废液进行预处理，达到实现减少高放废物的产生量、降低高放废物处置的风险的目的。本文主要以常见的几种预处理煅烧工艺技术（罐式煅烧法、喷雾煅烧法、流化床煅烧法和回转煅烧法等）为研究对象，分别从煅烧机理、研究现状及优缺点等多个方面进行较系统的分析探讨。     

Nitrogen in SL/RN direct reduced iron: origin and effect on nitrogen control in EAF steelmaking

Abstract

In the steel plant considered here, direct reduced iron (DRI), produced by the coal based Stelco–Lurgi/Republic–National (SL/RN) process, makes up 50% or more of the total iron charge. The SL/RN DRI samples from a kiln cooler had high nitrogen contents (50–250 ppm, depending on particle size), contributing to elevated nitrogen levels in liquid steel produced in the electric arc furnaces. The proposed mechanism of nitriding of SL/RN DRI involves gaseous nitrogen (present within the rotary cooler) diffusing into the solid bed and is supported by a simple diffusion model. A strong correlation was found between the melt-in carbon content of the liquid steel and the final tap nitrogen content, with melt-in carbon of 0·3%C or higher resulting in nitrogen levels below 50 ppm at tap, even when charging DRI material that is high in nitrogen.     

Benefits of oxygen enrichment in sponge iron rotary kiln emerging from data-driven modelling

Optimal oxygen enrichment conditions for sponge iron rotary kiln have been successfully explored on an industrial scale using a data-driven model. A multi-objective optimisation by genetic algorithm (MOGA) is employed to find the favourable conditions. The objective function for MOGA is derived from neural networks using pre-processed operational data. From industrial experimentations guided by the optimum conditions predicted by the present model, it emerged that when the coal fines injection is maintained at 1.75?tph and the oxygen enrichment is 8 Nm³?t^?1 of sponge iron, a reduction in the specific air requirement from 2609 to 2150?Nm³?t^?1 was obtained, while the end-zone bed temperature remained under control at 1132°C. These conditions resulted in a reduction of specific coal consumption by 6%, an enhancement in the sponge iron production by 6% and an increase in the rotary kiln campaign life from 50 to 100 days.     

论清康熙官窑瓷“仿明风”形成的条件与原因

清康熙中期时,御窑厂得到正式复兴。仿明是康熙官窑最鲜明的特色之一,从颜色釉至各类彩绘瓷均有显著的"仿明风"。康熙官窑"仿明风"是在各方面有利条件下形成的,其形成与当时政治与文化风气密切关联。     

空燃比在燃气抽屉窑的应用

结合自身技术优势和在窑炉行业的研究,在原来开度控制燃烧技术的基础上,研发了空燃比燃烧控制模式。该项技术在窑炉行业推广使用后,在满足产品烧成工艺的条件下,可以更好的控制燃料的使用,达到节能的效果。     

小截面长隧道窑生产潜力的认识

详细介绍了小截面直通道一次码烧长干燥焙烧隧道窑的结构特点及优点。