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跳汰重选回收铬铁合金厂固体废弃物

责任编辑:金工机械 发表时间:2016-05-28 08:43

青海快3   GEZHUYAOYINGYONGZAIYEJIN、HUAGONGHENAIHUOCAILIAOSHENGCHANGONGYEZHONG,QIZHONGDAYUE76%DEGEYINGYONGYUYESANJIUZHONGGONGYE。MUQIANYIFAXIANDE50YUZHONGHANGEKUANGWUZHONGJUYOUGONGYEYINGYONGJIAZHIDEZHIYOUGEJIANJINGSHILEIKUANGWU。WOGUODEGEZIYUANXIANGDANGPINFA,MEINIANDOUXUGAOCHENGBENDALIANGJINKOU。JINNIANLAIWOGUOBUXIUGANGSHENGCHANCHENGXUNSUZENGZHANGQUSHI,DUIGETIEDEXUQIULIANGYEYUELAIYUEDA。TONGSHI,GETIEHEJINYELIANQIYESUOMIANLINDEHUANJINGYALIYERIQUJINPO,YOUQISHIGETIEHEJINCHANGGUTIFEIQIWUDEPAIFANG,BIXUFUHEGUOJIAHUANBAOYAOQIU。

青海快3   TONGCHANG,GETIEHEJINCHANGZHONGGUTIFEIQIWUZHUYAOLAIYUANYUGAOWENSHENGCHANGONGYIZHONGCHANSHENGDELUZHAHECHENNI。GAOTANGETIEZHAZHANDUDA、RONGDIANGAO,ZHATIEWUFAWANQUANFENLI。YIBANLAISHUO,MEISHENGCHANlt GAOTANGETIEHEJINDAYUEYAOCHANSHENG1.1-1.2tFEIZHA;TONGSHIZAIGETIEHEJINMAIHULUYELIANGUOCHENGZHONG,YOUYUYUANSUDEGAOWENZHENGFA、DIANJIKONGFEIJIANCHUDEZHATIEHEZHUANGLIAOGUOCHENGZHONGLULIAOXIXIAOKELISUIWEIQIPAICHUHAIHUICHANSHENGYUE25kgDEYANCHENHUOWUNI。YOUYULUZHAHECHENNIZHONGHANYOUYIDINGLIANGDEZHONGJINSHULIZI,RULIUJIAGE、XINDENG,DUIHUANJINGHUIZAOCHENGYANZHONGWURAN,GUONEIWAIHUANBAOFADOUGUIDINGZHEIXIEFEIQIWUBIXUJINGGUOHUISHOUHUOWUHAIHUACHULICAINENGGOUPAIFANG。YOUQISHILIUJIAGE,YOUYUQIHUAHEWUZAISHUIZHONGJUYOUHENGAODERONGJIEDU,ERQIESHIYIZHONGZHIAIWUZHI,BUJINHUIYANZHONGWEIHAIRENTIJIANKANG,ZAOCHENGHUANJINGWURAN,HAIKENENGPOHUAISHENGTAIPINGHENG。

  世界上很多国家对固体废弃物中六价铬含量的限制也相当严格,以防止固体废弃物中盐类或有害物质浸出,造成土壤碱化和地下水污染。因此,回收利用铬铁合金厂固体废弃物对资源利用和环境保护都具有重要意义。

  CONGWAIGUANSHANGKAN,GAOTANGETIEZHACHENGHUIHEISE,BUFENGONGCHANGCHANSHENGDEZHACHENGANLVSEHETIEXIUHONGSE,QIZHIDIJIANYING,KANGYAQIANGDUZAI100-200MPaZHIJIAN,POSUIQILAISHIFENKUNNAN。YOUYANJIUBIAOMING,GAIZHAJINGSHUIJINHOUYIYUFENSUI,QIDUIMIDUYUEWEI1.2-1.7mg/cm³,MIDUWEI2.35kg/m³。GETIEHEJINYANCHENYIBANFENWEICUYANCHENHEXIYANCHENLIANGLEI,YOUXUANFENGCHUCHENQISHOUJIDEYANCHENKELICHICUNJIAODA,CHENGHEISE。ERYOUBUDAICHUCHENQIBUJIDEYANCHENCHENGQIANHUISE,KELIXIXIAO,JIYININGJUCHENGTUAN。GETIEHEJINXIYANCHENDEPINGJUNLIDUZAI0.7-13.2μm ZHIJIAN,SHUIFENHANLIANGJIAODI(YUEWEI1%),BIBIAOMIANJIHENDA,DANGQIJINRUSHUIZHONGSHICHENGJIANXING。CIWAI,YOUYUXIYANCHENZHONGHANKERONGXINGYANLEI,YUSHUIJIBUFENRONGJIE,ZHEIYIWEIZHEDUIFANGHUOTIANMAIZHEIXIEYANCHENHUIDAOZHITURANGJIANHUA。HEXIYANCHENXIANGBI,CUYANCHENDEPINGJUNLIDUDAYUEWEI80μm,SHUIFENHANLIANGGENGDI,JINRENSHUIZHONGSHICHENGQIANGJIANXING。

  GETIEHEJINZHABAOHANDEKUANGWUXIANGZHUYAOYOUMEILVJIANJINGSHI、MEIGANLANSHI、BOLIXIANG、JINSHUZHU、GAIMEIGANLANSHIHEGEJIANJINGSHIDENG。QIZHONGJIANJINGSHIXIANGSHIGETIEHEJINZHAZHONGDEZHUYAOKUANGXIANG,QIJINGLICHICUNYIBANCONGXIAOYU20μmDAODAYUE2000μm。GETIEHEJINZHAZHONGYUANSUDEJINCHUNENGLICHUJIADADAO16%WAI,QITAYUANSUDEKEJINCHULVDOUJIAODI,QIZHONGKEJINCHUGE、NIEHEXINFENBIEZHANZONGGE、ZONGNIEHEZONGXINDE0.03%-1.7%、4.6%-6.4%HE3.3%-5.9%。

  GETIEHEJINCUYANCHENHANYOUDALIANGDEGE、GUI、TIE、LV、MEIHETAN。ERGETIEHEJINXIYANCHENZEFUHANGUI、XIN、NA、JIA、MEI、LIUHELV。YUCUYANCHENXIANGBI,QIGE、TIEHETANHANLIANGJIAODI。GETIEHEJINCUYANCHENDEZHUYAOWUXIANGSHIGEJIANJINGSHI、SHIYING、GAIZHANGSHIHEFEIJINGXINGTANZHICAILIAO,ERXIYANCHENZEZHUYAOYULVHUANA、YANGHUAXINDENGWUZHIDEZHENGFAYIJIERYANGHUAGUI、YANGHUAMEIDENGYANGHUAWUDEGAOWENHAIYUANJINMIXIANGGUAN。ZAIGETIEHEJINXIYANCHENZHONGHAIFAXIANLESHAOLIANGHANJIEJINGSHUIDEHUAHEWU,YANJIUBIAOMINGKEJINCHUDELIUJIAGEJIZHONGZAIGETIEHEJINXIYANCHENZHONG,CAIYONGCHANGKAISHIMAIHULUYELIAN,YANCHENZHONGLIUJIAGEHANLIANGGAODA7000ppm,YUANYUANCHAOGUOLEGEGUODUILIUJIAGEDEHANLIANGXIANZHI。

  国内外许多厂家和研究机构都曾研究采用重选的方法来回收铬铁合金渣中的金属,如南非iMinek、津巴布韦Zimasco铬业有限公司、希腊 HelleniC铁合金公司、印度Bamnilal铁合金厂,国内锦州铁合金厂和上海铁合金厂。在上世纪七十年代末期,南非研究机构Mintek就开始研究从铬铁合金废渣中回收合金。早期的研究证实采用磁选和跳汰选矿可以从破碎的废渣中回收金属产品。经过二十多年的研究,他们成功开发出了从废渣中回收合金的工艺(ASF)。该工艺采用破碎、筛分等方法将废渣分成+25mm、-25+6mm、-6+1mm和-1mm四种不同粒级。将其中的-25+6mm的颗粒采用块状跳汰法来回收块状金属,尾矿进行研磨后再返回工艺中。颗粒尺寸大于25mm的渣块需经过研磨后返回。对于-6+1mm的颗粒则采用细粒跳汰来分离小颗粒金属。最后采用两级螺旋溜槽来回收小于1mm的金属颗粒。该工艺已在津巴布韦铬铁公司等六家公司实现商业化生产。其金属产品中仅含不到2%的渣,可以用于直接销售,且能回收超过96%的解离金属。在希腊的铁合金公司,采用分级跳汰的方法来分离出金属产品。对于 -30+10mm的废渣采用重介质分离,-10+3mm的颗粒采用跳汰选矿,而小于3mm的颗粒则采用摇床来回收。2000年,印度Bamnilal铁合金厂也建立了处理铬铁合金渣的选矿厂。该厂采用跳汰分选和摇床来分离渣铁得到合金。其工艺流程是将废渣破碎、筛分成-10+1mm和-1mm两个粒级的颗粒。对于尺寸为-10+1mm大颗粒采用AM30跳汰机青海快3分选,而小于1mm的颗粒则用摇床处理。其产品主要是可用于直接销售的铁合金和尾矿。

青海快3   GUONEISHANGHAITIEHEJINCHANGZAISHIYONGQIANGCIXUAN、ZHONGYEHETIAOTAIXUANKUANGHOU,ZUIZHONGCAIYONGTIAOTAIXUANKUANGLAIHUISHOUGEJINGKUANG。DANGONGYIDEHUISHOULVJINDADAO70%ZUOYOU,QIEBUNENGHUISHOUXIAOYU3mmLUZHAZHONGDEJINSHUKELI。CIWAI,JINZHOUTIEHEJINCHANGYECENGCAIYONGPANGDONGSHISHUANGDOUGEMOTIAOTAIJI(LTP34) LAIHUISHOUFEIZHAZHONGDEHEJIN。GONGYIZHONGXUXIANJIANGFEIZHAPOSUI、SHAIFENDAOKELILIJINGXIAOYU12mmHOUCAIYONGDIANCIZHENDONGJILIAOJISONGRUTIAOTAIJI。ZAILUZHALIDUXIAOYU12mmSHI,CHUANGSHICENGHOUDUWEI+40-60mmYIJIJIALIAOSUDUWEI2.2-3.0t/hKEYISHIZHAZHONGDEHEJINHUISHOULVDADAO68.86%,HUISHOUDEJINSHUCHANPINZHONGGEHANLIANGYEDADAOLE61.48%,JUYOULIANGHAODEXIAOGUO。

  我国的铬资源贫乏,有效回收铬铁合金厂固体废弃物可以产生良好的环境效益和经济效益。目前国内外处理铬铁合金废渣的技术主要有两类方法:采用重选、磁选等选矿方法青海快3回收金属或铬精矿,尾渣还可以用于生产水泥或铺路;采用循环回收用作其他工艺的原料,如用于生产微晶玻璃、耐火材料以及作水泥掺合料和铺路。对于铬铁合金粗烟尘在造球后可以直接返回到埋弧炉,而细烟尘不宜直接回收,可以采用湿法冶三久重工艺回收锌或采用固化/稳定化工艺来生产水泥或粘土砖。