CN1003604B - 高纯硅铁的生产方法 - Google Patents

高纯硅铁的生产方法 Download PDF

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CN1003604B
CN1003604B CN87104601.6A CN87104601A CN1003604B CN 1003604 B CN1003604 B CN 1003604B CN 87104601 A CN87104601 A CN 87104601A CN 1003604 B CN1003604 B CN 1003604B
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silicon steel
refinery coke
silicon
quartzite
coke
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CN87104601A (zh
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崔新东
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Hubei wall Pohang Silicon Technology Co.,Ltd.
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Hubei Jingshan Silicon Material Development And Application Research Institute
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Abstract

本发明涉及高纯硅铁的生产方式。它以精选石英石、石油焦、硅钢屑为原料，在矿热炉内还原冶炼硅铁，焦炭粒度０－１０ｍｍ，原料配比石英石∶石油焦∶硅钢屑＝１００∶４０－５５∶５－５５，石英石含ＳｉＯ2＞９８．０％，Ａｌ2Ｏ3＜０．０３％，ＣａＯ＜０．０１％，其他杂质（除氧化铁外）总和＜０．０２％。本硅铁可用于冻炼高牌号无取向硅钢，取向硅钢和低合金钢。

Description

高纯硅铁的生产方法
本发明属冶金领域，高纯硅铁产品主要用于冶炼高牌号取向硅钢、无取向硅钢及低合金钢等方面，该方法适用于各种冶炼硅铁的矿热炉。
日本、美国、挪威等国冶炼硅铁是采用硅石+冶金焦（+石油焦+木炭+煤等）+钢屑（或铁矿石）在矿热炉内还原，有的还在炉外用多元渣吸法除部份杂质，工艺复杂。国内所有厂家生产硅铁，其方法也是用硅石+冶金焦等+钢屑在矿热炉内还原，少数厂家用多元渣吸法除杂质，所得产品杂质含量高，不适用于高牌号硅钢冶炼使用。传统的配料方法是硅石∶焦碳∶钢屑＝100∶（48-56）∶26，硅石含SiO2＞97%均可使用，焦碳粒度为5-18mm，钢屑是一般碳素钢屑。其缺点是冶金焦灰份高，普通钢屑一般含有0.4-1.4%Mn，Cr、Ti、V含量也偏高，致使难于保证硅铁质量，焦碳粒度大，表面积小，还原反应时间长。
本发明的目的是要克服传统方法的缺点，选用合适的原料和工艺条件，生产高纯硅铁供冶炼高牌号硅钢等使用。
本发明的目的是以如下方法实现的，采用精选石英石+石油焦（或石油焦加少量其它碳素）+硅钢屑，在矿热炉内还原，石油焦粒度为0-10mm，最佳粒度为0-5mm。炉料配比为石英石∶石油焦∶硅钢屑＝100∶40-55∶5-55，此配比以固定碳含量为基准量。石英石化学成份（重量）要求为SiO2＞98.0%，Al2O3＜0.03%，CaO＜0.01%，其他杂质除氧化铁外总和小于0.02%。所得高纯硅铁产品的杂质含量可控制在下列范围;
表1
Figure 87104601_IMG1
Si和Fe二元素为有效元素，根据使用要求调整配比，必要时根据对个别元素要求量的变化，可在出炉液态产品中分别通入氯气20-40分钟，20公斤，或氧气30-40分钟，5公斤，或水煤气（H2+H2O）20-40分钟，5公斤。
本发明的冶炼操作与普通矿热炉法生产硅铁合金相同。即将矿热炉通电升温烘烤到1000℃以上，开始逐渐往炉膛中加入混配好的物料，直到装满炉膛，然后维持料面，随缺随加，根据需要捣炉、扎眼。连续还原冶炼，间歇开炉，第一次出料时间长些，而后定期出炉时间随容量大小而不同。正常情况不需炉外精炼，若由于矿石杂质稍偏高，带来出炉产品杂质超过标准时，可根据杂质成份通少量氯气，或氧气，或氯氧并用，进行炉外液态精炼。取样分析，铸锭，破碎包装。
图1是本法生产高纯硅铁工艺流程图。
在4000KVA矿热炉上试生产，其主要参数如下：
炉型：敞开固定式矿热炉
使用电压：80-110V
炉壳外径（毫米）;5200
炉壳高度（毫米）：3300
炉壳内径（毫米）：4050
炉膛深度（毫米）：1720
电极直径（毫米）：750
电极材质：标准电极糊自焙
电极极心圆直径（毫米）：1930
炉衬材质：高铝砖+碳砖
石油焦灰分量：0.10-1.44%，含硫0.35%
石油焦粒度（毫米）：0-10，绝大多数为0-5毫米
硅钢屑杂质含量%重量：Mn＜0.34，Cr＜0.04，
P＜0.026，S＜0.025
石英石用前述要求的石英石
石英石∶石油焦∶硅钢屑＝100∶46∶12-14
炼得高纯硅铁成份如表2，
　　　　表2 高纯硅铁成份
其ST-2硅铁供武钢生产高牌号无取向硅钢。ST-4号用于冶炼取向硅钢，其硅钢成品率100%。用本方法生产硅铁，在电力正常情况下，电耗为7800-8500度/吨硅铁。

Claims (2)

1、一种用矿热炉冶炼高纯硅铁的方法，其特征是采用精选石英石、石油焦（或石油焦加少量其他炭素），硅钢屑为原料，石英石∶石油焦∶硅钢屑（重量）＝100∶40-55∶5-55，以固定碳为基准量，石油焦粒度为0-10mm，最佳粒度为0-5mm，将矿热炉通电升温烘烤到1000℃以上开始加入混合好的物料。
2、如权利要求1所述的方法，其特征是精选石英石化学重量成分要求SiO2＞98.0%，Al2O3＜0.03%，CaO＜0.01%，其它杂质除氧化铁之外，总和＜0.02%。
CN87104601.6A 1987-06-30 1987-06-30 高纯硅铁的生产方法 Expired CN1003604B (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1042750C (zh) * 1996-10-17 1999-03-31 湖北中天星火化工有限公司 超低碳硅铁的生产方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1312312C (zh) * 2005-08-23 2007-04-25 谢廷声 用作炼钢合金化剂的钒—硅—钡—铁复合合金
CN101886203B (zh) * 2010-06-29 2012-01-25 湖北华尔靓实业集团有限公司 一种低氮硅铁产品
CN104342595A (zh) * 2013-07-30 2015-02-11 内蒙古大唐国际再生资源开发有限公司 一种硅铁合金的生产工艺
CN104419830A (zh) * 2013-08-20 2015-03-18 北京世纪锦鸿科技有限公司 大容量矿热炉控制铁合金中铝含量的方法
CN104263932A (zh) * 2014-10-16 2015-01-07 重庆大学 一种采用选铜尾渣生产硅铁合金的方法
CN105088052A (zh) * 2015-09-22 2015-11-25 刘来宝 一种利用光伏行业切割废料生产硅铁合金方法
CN105886765A (zh) * 2016-04-26 2016-08-24 江苏省冶金设计院有限公司 制备硅铁的方法
CN106086299A (zh) * 2016-06-07 2016-11-09 中卫市茂烨冶金有限责任公司 一种低铝硅铁的冶炼方法
CN107012294A (zh) * 2017-03-22 2017-08-04 常州润达铁合金有限公司 一种高纯硅铁粉及其制备方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1042750C (zh) * 1996-10-17 1999-03-31 湖北中天星火化工有限公司 超低碳硅铁的生产方法

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