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李文博等:LF精炼过程砷脱除的工业试验 85 表2工业脱砷试验结果 Table 2 Industrial trial result of dearsenication No.Initial ws/% Final ws/% Initial wAs% Final wAs% Alloy usage/kg Desulphurization rate/% Dearsenication rate/% 0.046 0.006 0.017 0.019 120 86.9 0.048 0.005 0.020 0.021 200 89.6 0.022 0.004 0.015 0.005 200 81.8 66.7 0.036 0.007 0.015 0.016 130 80.5 5 0.035 0.003 0.013 0.008 160 91.4 38.5 6 0.035 0.005 0.013 0.014 280 85.7 7 0.080 0.004 0.016 0.007 190 95.0 56.2 8 0.041 0.010 0.015 0.015 100 75.6 9 0.047 0.012 0.013 0.014 100 74.4 10 0.053 0.008 0.017 0.018 115 84.9 0.038 0.008 0.026 0.027 240 78.9 12 0.045 0.006 0.014 0.015 330 88.9 13 0.012 0.002 0.015 0.007 320 83.3 53.3 14 0.029 0.003 0.017 0.010 250 89.7 41.1 15 0.050 0.004 0.018 0.018 130 92.0 Note:ws is the mass fraction of sulphur,and ws is the mass fraction of arsenic in the molten steel. 0.09 0.016 Initial stage of LF refining 0.08 Intermeduate stage of LF refining 0.014 Final stage of LF refining 0.07 誉0012 0.06 0.05 0.008 0.04 0.03 是 0.02 0.002 0.01 483,: 00 12345678910111213141516 012345678910111213141516 Heat(times) Heat(times) 图1LF炉中硫含量变化 图3LF炉中钙含量变化 Fig.I Change of sulphur content in LF furnace Fig.3 Change of calcium content in LF furnace 液中砷含量共有3种变化规律,分别为: 0.030 stage of LF refining (1)LF精炼前期硫含量较高,经过LF精炼前 期阶段后,硫含量快速下降.在LF精炼中期阶段 硫的质量分数普遍高于0.01%,钙的质量分数低 ◆ 于0.001%的条件下,钢液中砷含量在LF精炼中、 后期无明显变化: 0.010 (2)LF精炼过程中硫含量不断下降,砷含量没 0.005 有明显降低.部分炉次砷含量反而出现上升趋势, 说明在前期精炼合金化过程中,所加入的相关合 0 12345678910111213141516 Heat(times) 金中含有一定量的砷.因此在炼钢脱砷过程中应 图2LF炉中砷含量变化 严格控制相关合金中的砷含量,以保证良好的脱 Fig.2 Change of arsenic content in LF furnace 砷效果;液中砷含量共有 3 种变化规律,分别为: (1)LF 精炼前期硫含量较高,经过 LF 精炼前 期阶段后,硫含量快速下降. 在 LF 精炼中期阶段 硫的质量分数普遍高于 0.01%,钙的质量分数低 于 0.001% 的条件下,钢液中砷含量在 LF 精炼中、 后期无明显变化; (2)LF 精炼过程中硫含量不断下降,砷含量没 有明显降低. 部分炉次砷含量反而出现上升趋势, 说明在前期精炼合金化过程中,所加入的相关合 金中含有一定量的砷. 因此在炼钢脱砷过程中应 严格控制相关合金中的砷含量,以保证良好的脱 砷效果; 表 2 工业脱砷试验结果 Table 2 Industrial trial result of dearsenication No. Initial wS /% Final wS /% Initial wAs/% Final wAs/% Alloy usage/kg Desulphurization rate/% Dearsenication rate/% 1 0.046 0.006 0.017 0.019 120 86.9 2 0.048 0.005 0.020 0.021 200 89.6 3 0.022 0.004 0.015 0.005 200 81.8 66.7 4 0.036 0.007 0.015 0.016 130 80.5 5 0.035 0.003 0.013 0.008 160 91.4 38.5 6 0.035 0.005 0.013 0.014 280 85.7 7 0.080 0.004 0.016 0.007 190 95.0 56.2 8 0.041 0.010 0.015 0.015 100 75.6 9 0.047 0.012 0.013 0.014 100 74.4 10 0.053 0.008 0.017 0.018 115 84.9 11 0.038 0.008 0.026 0.027 240 78.9 12 0.045 0.006 0.014 0.015 330 88.9 13 0.012 0.002 0.015 0.007 320 83.3 53.3 14 0.029 0.003 0.017 0.010 250 89.7 41.1 15 0.050 0.004 0.018 0.018 130 92.0 Note: wS is the mass fraction of sulphur, and wAs is the mass fraction of arsenic in the molten steel. 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 0 1 2 3 4 5 6 7 Heat (times) Mass fraction of sulphur/ % 8 9 10 11 12 13 14 15 16 Initial stage of LF refining Intermediate stage of LF refining Final stage of LF refining 图 1 LF 炉中硫含量变化 Fig.1 Change of sulphur content in LF furnace 0.030 0.025 0.020 0.015 0.010 0.005 0 0 1 2 3 4 5 6 7 Heat (times) Mass fration of arsenic/ % 8 9 10 11 12 13 14 15 16 Initial stage of LF refining Intermediate stage of LF refining Final stage of LF refining 图 2 LF 炉中砷含量变化 Fig.2 Change of arsenic content in LF furnace 0.016 0.012 0.010 0.014 0.008 0.006 0.004 0.002 0 0 1 2 3 4 5 6 7 Heat (times) Mass fration of calcium/ % 8 9 10 11 12 13 14 15 16 Initial stage of LF refining Intermediate stage of LF refining Final stage of LF refining 图 3 LF 炉中钙含量变化 Fig.3 Change of calcium content in LF furnace 李文博等: LF 精炼过程砷脱除的工业试验 · 85 ·
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