共查询到19条相似文献,搜索用时 78 毫秒
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纯氧吹炼铬铁工艺铬回收率影响因素的分析及控制 总被引:1,自引:1,他引:0
文本论述了纯氧吹炼铬铁生产中入炉高碳铬铁成分、温度、供氧制度、产品含碳量、硅质还原剂种类,动力搅拌作用及渣型等因素对铬回收率的影响,并提出了相应的控制措施. 相似文献
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简述了采用3t中频感应炉进行固态高碳铬铁重熔、液态高碳铬铁保温的工业性试验,并就上海申佳公司今后采用中频感应炉对液态高碳铬铁保温、并兼顾少量固态高碳铬铁重熔的工艺提出了操作意见,同时就炉龄问题作了简要分析。 相似文献
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介绍了高碳铬铁在生产过程中硫元素的来源、去向及其影响因素。对高碳铬铁生产中硫元素含量的控制常用方法进行了探讨,并提出了一些实际生产中应注意的问题。 相似文献
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论述了矿热炉冶炼高碳铬铁炉内炉料和炉气的基本运动规律。实践表明,通过选择合适的烧结铬矿的配入量和搭配铬矿的类型生产高碳铬铁,可以有效地调节和控制炉况,获得好的生产技术经济指标。 相似文献
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通过介绍电热法高碳铬铁生产原理和铬元素毒理性特性,分析高碳铬铁冶炼过程中铬元素流向,剖析可能引起铬污染的工序环节及途径,提出高碳铬铁生产中供今后可参考的铬污染防治措施。 相似文献
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我国铬铁合金生产与发展 总被引:4,自引:2,他引:2
为了促进我国未来的铬铁合金生产发展,介绍了我国铬铁合金生产的发展历程,着重论述了我国高碳铬铁、硅铬合金以及中、低、微碳铬铁工艺技术方面的发展历史和现状,指出了当前在生产和技术方面需加强管理和完善的问题。 相似文献
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E. L. J. Kleynhans J. P. Beukes P. G. Van Zyl J. R. Bunt N. S. B. Nkosi M. Venter 《Metallurgical and Materials Transactions B》2017,48(2):827-840
Ferrochrome (FeCr) production is an energy-intensive process. Currently, the pelletized chromite pre-reduction process, also referred to as solid-state reduction of chromite, is most likely the FeCr production process with the lowest specific electricity consumption, i.e., MWh/t FeCr produced. In this study, the effects of carbonaceous reductant selection on chromite pre-reduction and cured pellet strength were investigated. Multiple linear regression analysis was employed to evaluate the effect of reductant characteristics on the aforementioned two parameters. This yielded mathematical solutions that can be used by FeCr producers to select reductants more optimally in future. Additionally, the results indicated that hydrogen (H)- (24 pct) and volatile content (45.8 pct) were the most significant contributors for predicting variance in pre-reduction and compressive strength, respectively. The role of H within this context is postulated to be linked to the ability of a reductant to release H that can induce reduction. Therefore, contrary to the current operational selection criteria, the authors believe that thermally untreated reductants (e.g., anthracite, as opposed to coke or char), with volatile contents close to the currently applied specification (to ensure pellet strength), would be optimal, since it would maximize H content that would enhance pre-reduction. 相似文献
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介绍了“JL”法冶炼微碳铬铁的原料条件、炉渣碱度控制、高铬铬铁生产和产品质量情况以及提高反应包寿命的措施。在电硅热法的基础上改进而成的“JL”法具有投资少、周期短、见效快的特点。 相似文献
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研究还原剂种类及用量对高磷鲕状赤铁矿还原焙烧铁磷分离的影响.添加脱磷剂Na2CO3,在提铁降磷的同时能降低还原铁的硫含量;还原剂用量的增加都能促进铁还原,但使用灰分和固定碳含量较高或挥发分含量较低的还原剂时,不利于降磷.焙烧产物的X射线衍射分析表明:添加脱磷剂Na2CO3时,随着还原剂用量的增加,焙烧产物中金属铁含量增加,浮氏体和石英含量降低;使用灰分含量较高的还原剂时,随其用量的增加,灰分会消耗Na2CO3,从而减弱其对于铁还原的促进作用;还原剂用量相同时,石煤、烟煤、焦炭和褐煤所得焙烧产物中金属铁含量逐渐增加,浮氏体含量逐渐降低.总体来看,褐煤作为还原剂时铁磷分离效果最好,其次为烟煤,焦炭和石煤. 相似文献
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快速失重法测定富矿粉,焦粉的水分 总被引:1,自引:0,他引:1
人重水分测量装置确定了富矿粉和焦粉的极限失重温度。在两者的极限失重温度(300℃,450℃)下进行了水分测量,含有6.65%朱分的富矿粉,测定时间为5min;含有2.25水分的焦粉,测定时间为2.75min。 相似文献
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《钢铁冶炼》2013,40(1):38-42
AbstractA study has been undertaken to identify the source of coke fines sampled from the deadman area of the blast furnace. Using measurements of the coke crystallite dimension L C, it was established that some of the fines found in the deadman area of a blast furnace were not simply the degradation products of the lump coke in this area. The L C was measured using standard X-ray analysis techniques. The coke fines had a higher L C than the coke lump and therefore have experienced a higher maximum temperature than the associated coke lump. This finding has been interpreted as at least some of the coke fines found in the deadman area (lower temperature region) have been blown there from the raceway by the high velocity hot blast. 相似文献
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