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配合煤炼焦时硫分转化的研究 被引量:4
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作者 牛娅丽 《煤化工》 CAS 2008年第3期60-62,共3页
为预测焦炭质量,避免硫分过高,提出了"硫的滞留值"的概念,并以此进行了40kg小焦炉试验,研究单种煤硫的滞留值与配合煤炼焦时硫的滞留值之间的关系。试验结果显示,在煤质比较稳定的前提下,同类煤种间变换,单种煤与配合煤炼焦... 为预测焦炭质量,避免硫分过高,提出了"硫的滞留值"的概念,并以此进行了40kg小焦炉试验,研究单种煤硫的滞留值与配合煤炼焦时硫的滞留值之间的关系。试验结果显示,在煤质比较稳定的前提下,同类煤种间变换,单种煤与配合煤炼焦时硫的滞留值一致;不同煤种间的变换则规律性不强,尚待研究。 展开更多
关键词 单种煤 配合煤 硫的滞留值 硫分转化
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配煤炼焦中硫分研究 被引量:2
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作者 乔珍 《煤炭与化工》 CAS 2019年第4期129-132,共4页
为了研究煤种硫分迁移规律,峰煤焦化公司对生产所用煤种进行了铁箱实验,探讨了单种煤的硫分转化率,并结合岩相等数据进行了配煤炼焦实验。结果表明,高硫气煤硫分转化率较低,配入后在保证焦炭质量的同时,可降低配比中价高量少的低硫焦煤... 为了研究煤种硫分迁移规律,峰煤焦化公司对生产所用煤种进行了铁箱实验,探讨了单种煤的硫分转化率,并结合岩相等数据进行了配煤炼焦实验。结果表明,高硫气煤硫分转化率较低,配入后在保证焦炭质量的同时,可降低配比中价高量少的低硫焦煤、肥煤和瘦煤使用量,达到了降低配煤成本的目的。 展开更多
关键词 配煤 铁箱 岩相 硫分转化
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A new approach for recycling arsenic and tin from low-grade tin middlings using a self-sulfurization roasting
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作者 LI Lei XU Zhi-peng +4 位作者 HE Jun-li XIAO Yang SUN Yi-xuan LEI Yun ZHOU Juan 《Journal of Central South University》 SCIE EI CAS 2024年第9期3050-3067,共18页
Massive amounts of low-grade tin middlings have been produced from tin tailings,in which arsenic and tin are worthy to be recycled.Owing to high sulfur content in these tin middlings,a novel self-sulfurization roastin... Massive amounts of low-grade tin middlings have been produced from tin tailings,in which arsenic and tin are worthy to be recycled.Owing to high sulfur content in these tin middlings,a novel self-sulfurization roasting was proposed to transform,separate and recover arsenic and tin in this research.There was no extra curing agent to be added,which decreased the formation of pollutant S-containing gas.The self-sulfurization process involved a two-stage roasting of reduction followed by sulfurization.First in reduction roasting,FeAsS decomposed to FeS and As and the As then transformed to As_(4)(g)and As_(4)S_(4)(g),via which the arsenic was separated and recovered.The arsenic content in the first residue could be decreased to 0.72 wt.%.Accompanied with it,the FeS was firstly oxidized to Fe_(1−x)S and then to SO_(2)(g)by the coexisted Fe_(2)O_(3),and finally reduced and combined with the independent Fe_(2)O_(3)to form Fe_(1−x)S.In the followed sulfurization roasting,the Fe_(1−x)S sulfurized SnO_(2)to SnS(g),due to which tin could be recovered and its content in the second residue decreased to 0.01 wt.%.This study provided an efficient method to separate and recover arsenic and tin from low-grade tin middlings. 展开更多
关键词 low-grade tin middlings continuous sulfur transformation self-sulfurization separation of arsenic and tin recycling
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