CN101880736B - 超细钢渣微粉的制备技术及生产工艺 - Google Patents

超细钢渣微粉的制备技术及生产工艺 Download PDF

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CN101880736B
CN101880736B CN2010101856872A CN201010185687A CN101880736B CN 101880736 B CN101880736 B CN 101880736B CN 2010101856872 A CN2010101856872 A CN 2010101856872A CN 201010185687 A CN201010185687 A CN 201010185687A CN 101880736 B CN101880736 B CN 101880736B
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steel slag
iron
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superfine steel
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CN101880736A (zh
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陆文雄
樊钧
施钟毅
郁士忠
曹栋樑
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Shanghai Haili New Green Building Materials Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B03C1/30—Combinations with other devices, not otherwise provided for
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B5/00—Treatment of  metallurgical  slag ; Artificial stone from molten  metallurgical  slag 
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B3/00—General features in the manufacture of pig-iron
    • C21B3/04—Recovery of by-products, e.g. slag
    • C21B3/06—Treatment of liquid slag
    • C21B3/08—Cooling slag
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/02—Physical or chemical treatment of slags
    • C21B2400/022—Methods of cooling or quenching molten slag
    • 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
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Abstract

本发明涉及一种超细钢渣微粉的制备技术及其生产工艺。选用柱磨机、V型选粉机和磁选机作为预粉磨闭路循环系统使钢渣中夹裹的金属铁在循环中得到多次分离和回收；选用高细磨、K式选粉机、沉降室和磁选机组成终粉磨闭路循环系统使超细钢渣微粉中夹裹的微量金属铁得到多次分离和回收。这样制备的超细钢渣微粉其比表面积≥600m2/kg，其中小于30μm粒径的超细钢渣微粉占总质量的90％以上、金属铁含量≤0.5％。

Description

超细钢渣微粉的制备技术及生产工艺
技术领域
本发明涉及一种超细钢渣微粉的制备技术及生产工艺，属于工业固体废弃物综合利用及建筑材料技术领域。
背景技术
随着我国钢铁产量的逐年增加，排出的钢渣也随之增加。将钢渣微粉化是综合利用钢渣和提升钢渣技术附加值的关键途径。然而，由于钢渣中渣和铁夹杂在一起，结构致密，硬度高，不易破碎和粉磨。长期以来用传统的粉磨设备加工钢渣一直比较困难，目前在钢渣微粉的应用技术领域中钢渣微粉的比表面积≤500m2/kg，而且≤40μm粒径的钢渣微粉仅占65％以下，钢渣微粉中的含铁量≤1％，金属铁除净率不高。
发明内容
本发明的目的在于提供一种粒径小于30μm(按质量计)≥90％的超细钢渣微粉的制备技术及其生产工艺，其特征在于选用以下的制备设备和闭路循环磨细除铁的工艺设计：
a、选用柱磨机为主体设备的预粉磨闭路循环工艺：
首先将夹杂有少量金属铁的、符合YB/T022标准规定要求的、小于或等于20mm的转炉或电炉钢渣颗粒原料从储存库经调速皮带秤均匀地送往预粉磨系统。调速皮带秤上设置的磁选机先回收原料中夹杂的少量粗颗粒金属铁再将钢渣颗粒原料送入柱磨机进行预粉磨，柱磨机碾研粉碎钢渣并使钢渣中包裹的金属铁在碾研中得到分离，流出的渣、铁混合物进入V型选粉机进行分级处理；大部分小于或等于2mm的钢渣细粉料(金属铁含量小于1％)进入微粉收集器并被送往终粉磨原料储存库，大于2mm的钢渣粗粉料被返还(金属铁含量大于1％)和调速皮带秤上的钢渣颗粒原料一起重新送入柱磨机再次碾研粉碎和分离渣、铁，每一次循环在返回路径上钢渣粗粉料中已经分离的金属铁都被设置的磁选机富集和回收。
b、选用高细磨和K式选粉机为主体设备的终粉磨闭路循环工艺：
小于或等于2mm的钢渣细粉料由终粉磨原料库通过电子计量称进入高细磨生产大量超细钢渣微粉并分离残存在钢渣细粉料中的金属铁，流出的这些超细钢渣微粉、金属铁的混合料被送入K式选粉机进行分级处理；大部分小于或等于30μm的超细钢渣微粉得到收集进入成品库，(金属铁含量小于0.5％)大于30μm含有微量金属铁粉的微粉料通过风送斜槽返回终粉磨原料库并和钢渣细粉料一起计量重新送入高细磨再次生产超细钢渣微粉并分离其中的微量金属铁，每一次循环在返回路径上微粉料中已经分离的金属铁都被设置的沉降室和磁选机富集和回收。
本发明的特点及优点如下：
采用本发明的预粉磨和终粉磨系统可高效去除钢渣中的金属铁，使最终产物中的金属铁含量小于05.％；超细钢渣微粉的比表面积大于600m2/kg；粒径小于30μm的超细钢渣微粉大于90％(按质量计)；综合吨电耗小于70kwh；其技术经济指标优于目前国内外钢渣微粉产业所达到的指标。
附图说明
图1为本发明中的预粉磨闭路循环系统工艺流程图。
图2为本发明中的终粉磨闭路循环系统工艺流程图。
具体实施方式
现将本发明的具体实施例叙述于后。
实施例1
上海某钢铁有限公司提供的钢渣尾矿颗粒(≤20mm)经烘干磁选工序后，经电子称量进入预粉磨闭路循环系统，选用柱磨机碾研，每小时进料(20-25)t，出磨物料细度控制≤35.0％(2.5mm筛筛余)，物料流入V型选粉机和微粉收集器组成的分级工序(V型选粉机循环负荷＝120％)，分级后粗料经磁选除铁返回柱磨机进行循环碾研，细料(2.5mm筛筛余＝1.3％，金属铁＝0.95％)进入终粉磨闭路循环系统；高细磨每小时进料36吨，出磨物料细度控制(28～29)％(45μm筛筛余)，K式选粉机转速N＝270/分钟，选出的超细钢渣微粉比表面积620m2/kg，粒径小于30μm的超细钢渣微粉占总质量90.5％，金属铁含量0.45％。粒径大于30μm的钢渣粉返回高细磨循环研磨。
实施例2
将南京某钢厂提供的≤25mm钢渣尾矿颗粒，经烘干、磁选工序后经电子称量送入柱磨机，每小时进料(25-28)t，出磨物料细度控制≤30.0％(2.5mm筛筛余)，物料流入V型选粉机和微粉收集器组成的分级工序(V型选粉机循环负荷125％)，分级后粗料经磁选除铁后返回柱磨机进行循环碾研，细料(2.5mm筛筛余＝1.5％，金属铁含量＝0.75％)进入终粉磨闭路循环系统；高细磨每小时进料40吨，出磨物料细度控制(26～27)％(45μ筛筛余)，K式选粉机转速N＝270/分钟，选出的超细钢渣微粉比表面积635m2/kg，粒径小于30μm的超细钢渣微粉占总质量91％，金属铁含量0.35％。粒径大于30μm的钢渣粉返回高细磨循环研磨。
所述内容仅为本发明构思下的基本说明，而根据本发明的技术方案所作的任何等效变换，均应属于本发明的保护范围。

Claims (1)

1.一种超细钢渣微粉的制备技术及其生产工艺，其特征在于选用以下的制备设备和闭路循环磨细除铁的工艺设计：
a、选用柱磨机为主体设备的预粉磨闭路循环工艺：
首先将夹杂有少量金属铁的、符合YB/T022标准规定要求的、小于或等于20mm的转炉或电炉钢渣颗粒原料从储存库经调速皮带秤均匀地送往预粉磨系统；
调速皮带秤上设置的磁选机先回收原料中夹杂的少量粗颗粒金属铁再将钢渣颗粒原料送入柱磨机进行预粉磨，柱磨机碾研粉碎钢渣并使钢渣中包裹的金属铁在碾研中得到分离，流出的渣、铁混合物进入V型选粉机进行分级处理；
大部分小于或等于2mm的金属铁含量小于1％的钢渣细粉料进入微粉收集器并被送往终粉磨原料储存库，大于2mm的金属铁含量大于1％钢渣粗粉料被返还和调速皮带秤上的钢渣颗粒原料一起重新送入柱磨机再次碾研粉碎和分离渣、铁，每一次循环在返回路径上钢渣粗粉料中已经分离的金属铁都被设置的磁选机富集和回收；
b、选用高细磨和K式选粉机为主体设备的终粉磨闭路循环工艺：
小于或等于2mm的钢渣细粉料由终粉磨原料库通过电子计量称进入高细磨生产大量超细钢渣微粉并分离残存在钢渣细粉料中的金属铁，流出的这些超细钢渣微粉、金属铁的混合料被送入K式选粉机进行分级处理；
大部分小于或等于30μm的金属铁含量小于0.5％超细钢渣微粉得到收集进入成品库，大于30μm含有微量金属铁粉的微粉料通过风送斜槽返回终粉磨原料库并和钢渣细粉料一起计量重新送入高细磨再次生产超细钢渣微粉并分离其中的微量金属铁，每一次循环在返回路径上微粉料中已经分离的金属铁都被设置的沉降室和磁选机富集和回收。
CN2010101856872A 2010-05-26 2010-05-26 超细钢渣微粉的制备技术及生产工艺 Expired - Fee Related CN101880736B (zh)

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CN101880736B (zh) * 2010-05-26 2012-06-27 上海海笠工贸有限公司 超细钢渣微粉的制备技术及生产工艺
CN108033695B (zh) * 2017-12-12 2020-10-09 上海海笠新型环保建材股份有限公司 超细高活性钢渣粉及其制备方法
CN110788114B (zh) * 2019-10-23 2020-12-29 迁安威盛固废环保实业有限公司 一种钢渣实时循环除铁和粉磨方法
CN112010579A (zh) * 2020-09-08 2020-12-01 山东埃尔派粉体科技有限公司 一种超细钢渣粉的生产方法
CN113402179B (zh) * 2021-05-10 2022-10-25 江苏融达新材料股份有限公司 一种基于钢渣活化技术的超高比表面积钢渣粉生产工艺
CN114871236B (zh) * 2022-03-23 2023-07-04 山东山科同创环境工程设计院有限公司 一种细钢渣尾渣辊式粉磨超细粉的系统及方法

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CN2542653Y (zh) * 2002-05-11 2003-04-02 和相见 利用硫铁矿渣生产氧化铁颜料的装置
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CN100386446C (zh) * 2005-06-30 2008-05-07 武汉理工大学 从钢渣中回收铁的方法
CN1916186A (zh) * 2005-08-16 2007-02-21 莱芜厚泽钢渣环保工程有限公司 一种冶金渣微粉生产工艺
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