已入深夜,您辛苦了!由于当前在线用户较少,发布求助请尽量完整地填写文献信息,科研通机器人24小时在线,伴您度过漫漫科研夜!祝你早点完成任务,早点休息,好梦!

Interactions of dolomitic lime with iron silicate melts.

辉绿岩 镁橄榄石 石灰 硅酸盐 矿物学 溶解 熔渣(焊接) 橄榄石 材料科学 冶金 化学 物理化学 有机化学
作者
Paul W. Williams
链接
摘要

An investigation has been made of the dissolution of dolomitic lime in iron silicate (fayalite) melts at temperatures corresponding to those obtained during the early stages of an LD blow (1300°C). The melts were contained in iron crucibles and held in a furnace under an argon atmosphere. Cylinders of dolomitic lime, prepared from dolomitic limestone, were preheated to the temperature of the melt and immersed for times ranging from 15 to 540 seconds. The reacted cylinders were withdrawn, and quenched under an argon jet for microscopic examination and scanning electron microscope analysis. Equivalent experiments were undertaken with calcitic lime cylinders prepared from limestone. A rotating bob-fixed crucible viscometer technique has been established, and viscosities of synthetic slags within the system CaO-FeO-SiO2-MgO, were measured. Cone fusion studies were used to determine the melting behaviour of the slag system. Dolomitic lime and iron silicate (fayalite) melt reacted to form magnesiowustite and dicalcium silicate, and a globular wustite and forsterite-fayalite olivine series was established at the melt-cylinder interface region. The dissolution of dolomitic lime was controlled by the transport of magnesia into the melt, by diffusion, from the forsterite-fayalite zone.. Corresponding iron silicate-calcitic lime reactions prodiiced a liquid cal-ciowftstite phase contained within a continuous envelope of dicalcium silicate, surrounding the lime sample, which assumed a granular morphology when a 5 mass % MgO addition was made to the melt. Magnesia levels up to 7.5 mass % MgO raised the viscosity of fayalite by 250 mPa.s at 1300°C. Magnesia increased the liquidus temperatureand melting range of synthetic CaO-FeO-SiO2 melts at all levels of addition. A modified film theory approach has been used to calculate the experimental mass transfer coefficients for CaO and MgO.The relative rates of calcitic and dolomitic lime solution have been assessed and the results evaluated in relation to the industrial situation. It has been shown that dolomitic lime does not represent a replacement for calcitic lime. However, it is essential for reducing refractory wear rates and enhancing the formation of a basic early formed slag, when used in conjunction with calcitic lime, provided it is added at the commencement of the blow.

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
多多完成签到,获得积分10
2秒前
redamancy完成签到 ,获得积分10
2秒前
Vaseegara完成签到 ,获得积分10
5秒前
旷野发布了新的文献求助10
8秒前
上官若男应助科研通管家采纳,获得10
13秒前
田様应助科研通管家采纳,获得10
13秒前
慕青应助科研通管家采纳,获得10
13秒前
13秒前
wanci应助科研通管家采纳,获得10
14秒前
14秒前
汉堡包应助科研通管家采纳,获得10
14秒前
14秒前
14秒前
香蕉觅云应助科研通管家采纳,获得10
14秒前
清爽冬莲完成签到 ,获得积分10
21秒前
gxl完成签到,获得积分10
22秒前
浮尘完成签到 ,获得积分0
29秒前
笨笨的荧荧完成签到 ,获得积分10
33秒前
lizigongzhu发布了新的文献求助10
34秒前
顺利问玉完成签到 ,获得积分10
34秒前
Jasper应助科研达人采纳,获得10
37秒前
蓬荜生辉完成签到,获得积分10
37秒前
xinqianying完成签到 ,获得积分10
37秒前
范户晓发布了新的文献求助10
38秒前
酷炫的安青完成签到 ,获得积分20
39秒前
zqqq完成签到 ,获得积分10
39秒前
丘比特应助阿邱采纳,获得10
41秒前
上官完成签到 ,获得积分10
42秒前
邵邵完成签到,获得积分10
43秒前
程程完成签到 ,获得积分10
48秒前
51秒前
修辛完成签到 ,获得积分10
52秒前
归海浩阑发布了新的文献求助30
53秒前
53秒前
科研达人发布了新的文献求助10
54秒前
詹卫卫完成签到 ,获得积分10
57秒前
shawn完成签到 ,获得积分10
1分钟前
1分钟前
正直的新筠完成签到,获得积分10
1分钟前
1分钟前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
基于可调谐半导体激光吸收光谱技术泄漏气体检测系统的研究 350
Robot-supported joining of reinforcement textiles with one-sided sewing heads 320
Aktuelle Entwicklungen in der linguistischen Forschung 300
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3989989
求助须知:如何正确求助?哪些是违规求助? 3532034
关于积分的说明 11256053
捐赠科研通 3270900
什么是DOI,文献DOI怎么找? 1805105
邀请新用户注册赠送积分活动 882270
科研通“疑难数据库(出版商)”最低求助积分说明 809216