低磷低碳锰硅合金(高硅硅锰)

低磷低碳锰硅合金（高硅硅锰合金）技术操作规程1牌号及化学成分（见表1）表1低磷低碳锰硅合金牌号和化学成分(%)┏━━━━━━━━━┳━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━━━┓┃┃┃化学成分┃┃品种┃牌号┃┃┃┃┣━━━━━┳━━━━━┳━━━━━━━┳━━━━━━━┫┃┃┃Mn┃Si┃C┃P┃┣━━━━━━━━━╋━━━━━━━━╋━━━━━╋━━━━━╋━━━━━━━╋━━━━━━━┫┃┃FeMn60Si28┃60--62┃≥28┃≤0.050┃≤0.050┃┃高硅锰硅合金I┃┃┃┃┃┃┃┣━━━━━━━━╋━━━━━╋━━━━━╋━━━━━━━╋━━━━━━━┫┃┃FeMn58Si28┃58～60┃≥28┃≤0.050┃≤0.050┃┣━━━━━━━━━╋━━━━━━━━╋━━━━━╋━━━━━╋━━━━━━━╋━━━━━━━┫┃┃FeMn60Si28┃60～62┃≥28┃≤0.080┃≤0.080┃┃高硅锰硅合金II┃┃┃┃┃┃┃┣━━━━━━━━╋━━━━━╋━━━━━╋━━━━━━━╋━━━━━━━┫┃┃FeMn58Si28┃58～60┃≥28┃≤0.080┃≤0.080┃品种牌号化学成分MnSiCP高硅锰硅合金IFeMn60Si2860～62≥28≤0.050≤0.050FeMn58Si2858～60≥28≤0.050≤0.050高硅锰硅合金IIFeMn60Si2860～62≥28≤0.080≤0.080FeMn58Si2858～60≥28≤0.080≤0.0802锰矿技术条件（含喂线因素）（见表2）表2锰矿技术条件(%)品种牌号Mn/Fe范围P/Mn≤高硅锰硅合金IFeMn60Si288.5～100.0008FeMn58Si287.5～90.00085.4浇注、取样5.4.1喂线结束后立即扒净包内脱磷炉渣。5.4.2浇注、取样。6高硅锰硅合金配料计算6.1计算依据合金成分控制：[Mn]>60%，[Si]≥28%．[P]≤0.10%，[C]≤0.10%，其它0.5%，其余是Fe。6.2元素及化合物分配（见表4）表4元素及化合物分配去向MnSiFePCa0Mg0Al203分配比(%)入合金85529590000入渣53855959595入烟尘1010O55556.2.1原料成分（见表5）表5混合矿成分(%)MnFeSi02Ca0Mg0Al203P其它Mn/FeP/Mn35.913.9120.59.372.723.510.03549.20.0016.2.2焦炭成分（见表6）表6焦炭成分(%)固定炭挥发分灰分水分灰分成分Si02Ca0Mg0FeAl203PS824141052.82.931.124.40260.2170.68炉眼排炭、炉口烧损l0%。硅石成分：Si02-98%。6.2.3配料计算(以100(kg)混合矿为基准计算）合金制得量：100×(35.91%×85%+3.91%×95%)/（100%-28%-0.10%-0.10%-0.5%）=48.02(kg)合金成分：[Mn]=100×35.91%×85%/48.02=63.56%[P]=100×0.035%×90%/48.02=0.066%焦炭用量计算：①反应Mn304+C=3Mn0+CO用炭量：12×100×35.91%/（55×3）=2.61(kg)②反应MnO+C=Mn+CO用炭量：100×35.91%×12×(85+10)%/55=7.44(kg)③反应Si02+2C=Si+2CO用炭量：48.02×28%×24×(52+10)%/（28×52%）=13.74(kg)④反应Fe0+C=Fe+CO用炭量：100×3.91%×90%×12/55=0.75(kg)⑤反应合金渗碳量48.02×0.1%=0.048(kg)考虑到出铁口排炭、焦炭含水，则需焦炭量：(2.61+7.44+13.74+0.75+0.048)÷0.82÷0.9÷0.9=37.01(kg)硅石用量：焦炭代入Si02:37.01×14%×52%=2.69(kg)矿中代入Si02:100×20.5%=20.5(kg)合金需硅量：48.02×28%=13.45(kg)折成Si02量：13.45×60÷28=28.81考虑Si的回收率为52%，则需Si02量：28.81÷52%=55.41(kg)原料需补加Si02量：55.41-20.5-2.69=32.22(kg)折成硅石量：32.22÷98%=32.87(kg)料批组成(见表7):混合矿100(Kg)500(Kg)600(Kg)焦炭37185222硅石331651986.2.4炉渣成分计算（见表8）进入炉渣组份计算重量（Kg）重量百分含量（%）Mn100×35.91%×5%1.804.24与Mn结合O1.8×16/550.521.23Fe100×3.91%×5%0.1960.46与Fe结合O0.196×16/550.0570.13SiO255.41×38%21.0649.62CaO100×9.37