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Comprehensive Utilization of Metallurgical Dusts & Sludge with New Type Composite Binder (CB)
Zhang Yuan-bo,Han Gui-hong * #
School of Resources Processing & Bioengineering, Central South University, Changsha, Hunan, 410083
*Correspondence author
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Funding: 国家杰出青年自然科学基金,国家自然科学基金,国家博士后基金(No.50725416,50804059,20080431031)
Opened online: 1 June 2009
Accepted by: none
Citation: Zhang Yuan-bo,Han Gui-hong.Comprehensive Utilization of Metallurgical Dusts & Sludge with New Type Composite Binder (CB)[OL]. [ 1 June 2009] http://en.paper.edu.cn/en_releasepaper/content/32766
 
 
Having poor hydrophilicity, metallurgical dusts & sludge are difficult to recycle. Aiming at producing metallic briquettes for iron-making, investigations on agglomeration of metallurgical dusts & sludge with CB and its reduction roasting are studied. CB consists of organic polymer, which can improve hydrophilicity of dusts & sludge. FT-IR spectrum indicates that composite binder contains a variety of active groups (-OH,-COOH). Using the wet-grinding process, CB dosage can be decreased to 1.4%. Composite binder has the role of catalytic reduction at high temperature. Compared bentonite with the composite binder, the TFe and metallization ratio of products are increased by 2-3%. Under the conditions of roasting temperature 1275℃, and time 20 min, roasted briquettes with TFe of 64.74% and metallization ratio of 85.66% could be obtained. The residual Zn and Pb content meet the demands of iron-making.
Keywords:metallurgical dusts & sludge;comprehensive utilization;composite binder;reduction
 
 
 

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