高品位低SiO2烧结技术ppt课件

1、SiO2企业称号年份烧结矿SiO2(%)入炉矿档次(%)高炉利用系数(t/m3d)入炉焦比(kg/t)喷煤量(kg/t)渣铁比(kg/t)宝钢19856.1958.111.7645448.1(油)32019925.4958.352.094413.314.7+28.5(油)29919975.3858.861.983380.0109.0307.319994.5160.002.264299.5205.225920034.5860.162.248299.9192.6259酒钢19989.3549.611.72857242.970019999.1050.471.87959450.169020008.78

2、50.492.04056149.460520018.4051.452.01453067.853020027.9052.012.07048490.948020037.5252.272.144413146.0435南(京)钢19955.8756.022.119474.863.239319975.2356.562.455459.478.638619994.8857.872.564441.099.031920024.7060.503.254376.8127.227720034.8059.403.316406.2121.8316三(明)钢199856.8157.752.84744888199957.60

3、58.772.93641390200058.2859.543.238409120200158.7560.273.572395117200258.8960.393.796381119200358.0059.893.968405107新兴铸管公司200156.4657.893.155920200258.3559.413.7849937200359.0059.514.214071262004.1-558.9559.584.55354170 由表1可见，不同企业高炉目的的改善都离不开入炉矿档次和渣比，仅有提高的速率和幅度有区别，还有一个特点是2003年由于原燃料紧缺，档次下降，导致焦比上升，有的产量也

4、有下降。而影响入炉矿档次最主要的是烧结矿的档次，影响渣量最主要的也是烧结矿的SiO2含量，由于烧结矿普通均占到入炉料的70%以上，因此应该把高档次，低SiO2消费技术与进一步改善高炉技术经济目的直接联络起来。企业称号烧结机面积(m2)年份炉料厚度(mm)利用系数(t/m2t)转鼓指数(+6.3%)烧结矿主要化学成份(%)CaO/SiO2TFeSiO2Al2O3MgOFeO宝钢450320016551.227(+10mm)75.971.8159.144.441.481.587.4720026441.215(JIS规范)77.741.8258.854.561.501.607.61莱钢1052200

5、16981.42876.842.0058.84.371.951.978.6820026991.45577.312.1058.494.081.512.038.54太钢100290220027001.59078.341.5556.226.711.302.508.4320037001.32973.581.8360.114.531.102.309.30济钢90220016001.75471.771.8758.544.711.752.107.5320026401.77872.282.2757.394.521.701.5010.48杭钢28.2220014412.33485.462.6256.254.52

6、1.301.5010.4820024722.04274.902.5455.484.921.351.5510.41水钢1451115220015381.59167.131.8955.875.061.303.607.6420025451.64567.101.9156.694.591.203.707.84表2 我国高档次低硅(SiO2)烧结消费的主要情况表3 蛇纹石的化学成分FeOCaOMgOAl2O3SPSiO2MnOLOI7.982.2136.641.360.035-36.65-14.6蛇纹石/%焦比/%水分/%烧结速度/%转鼓强度/%废品率/%废品率/%05.76.317.1563.4378.

7、131.6151.15.76.317.1464.4779.431.6201.35.76.317.8065.0080.541.680表5 生石灰配比对烧结矿各项目的的影响生石灰配比/%焦比/%适宜水分/%转鼓强度/%利用系数/tm-2h-1废品率/%06.26.560.771.92182.1116.26.561.761.89382.0336.26.564.701.72682.2656.27.065.151.88682.156.76.28.366.311.73582.67料高/mm焦比/%混合料水分/%烧结速度/mmmin-1烧结矿转鼓强度/%废品率/%利用系数/tm-2h-1FeO/%6005.

8、56.819.0064.5379.111.6138.017005.56.518.7864.9081.151.6778.007505.56.818.5665.7382.691.8037.64太钢不同料层操作烧结各项目的列于表7表7 太钢二烧不同料层操作参数及目的 料层/mm总管负压/kPa台时产量/tFeO%FeO1%R0.08/%返矿量/tgt-1工序能耗/kgt-1固体燃耗/kgt-150010.6126.109.741.284.362480.962.560011.2142.087.860.991.3535261.2450.870012.3.207.661.293.6426058.649.4

9、表8 莱钢不同R烧结矿矿物组成冶金性能 900复原性/%低温复原粉化性(RDI+3.15)荷反复原软化性能/开场软化软化终了软化区间70.171.81082124516379.485.31073121414188.186.711001236SFCAFe3O4Fe2O32CaOSiO2玻璃相未矿化熔剂1.351012505571032025121.802545710681012121.90354057577835Cao/SiO2Fe3O4Fe2O3SFCA玻璃相2CaO.SiO2未矿化熔剂1.3150-557-1010-15203-51-21.7830-3510-1535-403-5102-31

10、.9625-3015402-3101-22.15307-10451-2153-5表10 消费高碱度烧结矿前后主要烧结消费目的对比时间台时产量/t台-1h-1槽下筛分(510 mm)/%槽下筛分(5mm)/%返矿率/%FeO/%消费高碱度烧结矿前R：1.3026.4618.602.9617.8115.64消费高碱度烧结矿后R：1.8028.0812.202.312.2711.51比较+1.62-6.40-0.66-5.54.4.13时间转鼓指数(+6.3mm)/%筛分指数(-5mm)/%抗磨指数(-0.5mm)/%消费高碱度烧结矿前R：1.3062.082.965.35消费高碱度烧结矿后R：1.

11、8068.572.304.67YB/T421-1992一级品66.07.07.0规范要求二级品6309.040mm4025mm2516mm1610mm105mm1.80)有利于提高SFCA的生成比例，有利于提高强度，有利于改善烧结矿的粒度组成，也有利于改善废品矿的冶金性能。高碱度烧结矿有利于高铁低硅烧结粘结相的构成和添加，有利于提高高铁低硅烧结矿的强度。(5)低MgO烧结： 实际研讨和消费实际均证明：在高SiO2条件下和在低SiO2条件下，MgO有利于构成Fe3O4，从而降低SFCA的生成比例，降低冷强度降低废品率降低复原性。 表14 MgO含量对烧结矿产质量的影响MgO含量/%焦粉配比/%转

12、鼓强度/%废品率/%利用系数/tm-2h-1低温复原粉比RDI+3.15/%2.005.863.2480.521.61670.601.885.864.3480.501.58164.621.585.865.5180.11.86264.351.305.866.2291.271.84459.884.国外高铁低硅烧结的情况及展望原料化学成分，分量%FeCaOMgOSiO2Al2O3MAF70.60.20.430.80.3CARAJAS680.10.100.30.9QCM66.10.020.034.880.32橄榄石6.30.551.931.30.31白云石2.729.020.91.10.2石灰石2.8

13、50.40.91.80.5生石灰0.390.24.101.20.5石英0.10.110.05970.71焦粉0.70.261.175.572.961) 国外高铁低硅烧结原料的情况表16 欧洲部分钢铁企业烧结矿成分(%) 国家厂家FeFeOSiO2碱度MgOAl2O3比利时希德玛59.84.564.981.441.821.14芬兰罗特洛基60.47.84.21.662.110.99荷兰赫哥文58.510.63.952.601.461.33德国斯维尔根57.95.15.341.771.691.09德国迪林根58.25.925.611.491.521.23德国博莱门58.86.484.971.681.621.22德国塞兹基特58.84.84.772.050.331.30烧结矿TFeFeO