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捣固焦炭在大型高炉中的应用实践

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捣固焦炭在大型高炉中的应用实践

  • Categories:企业视角
  • Author:
  • Origin:攀钢煤化工厂
  • Time of issue:2012-03-28
  • Views:0

(Summary description)

捣固焦炭在大型高炉中的应用实践

(Summary description)

  • Categories:企业视角
  • Author:
  • Origin:攀钢煤化工厂
  • Time of issue:2012-03-28
  • Views:0
Information

        近几年,我国捣固焦炉发展很快,投产的捣固焦炉已超过400座,焦炭产能在1亿吨左右,但这些焦炉有95%以上是建在独立焦化厂。在独立焦化厂,2006年底5.5m捣固焦炉在云南曲靖建成投产,此后,河北旭阳、河南金马等相继投产;在钢铁企业焦化厂采用捣固炼焦工艺的不多;国内大型联合钢铁企业还没有采用捣固炼焦,国外只有德国有高炉冶炼应用捣固冶金焦的经验。攀钢是国内大型钢铁联合企业中首家建设捣固焦炉的企业,两座5.5m捣固焦炉于2009年建成并投产,捣固焦炭在大型高炉上应用后,能满足高炉生产的要求,高炉综合冶炼强度比用顶装焦炭有明显提高。

捣固焦炉与顶装焦炉焦炭质量的分析对比
     为了验证捣固焦炉在攀钢配煤条件下改善冶金焦质量的情况,开展了相同配煤比下200kg小焦炉、半工业顶装炼焦和捣固炼焦试验,同时结合实际生产,比较不同炼焦工艺所得焦炭的质量。
1.1  200kg小焦炉实验
     为了比较不同炼焦工艺条件下焦炭质量的变化情况,开展了相同配煤比200kg小焦炉顶装炼焦和捣固炼焦的试验,其配煤方案、炼焦试验结果见表1~3。

1        200kg小焦炉的配煤方案(%)


方案号

煤种1

煤种2

煤种3

煤种4

煤种5

煤种6

煤种7

煤种8

1

24

10

14

10

10

18

14

2

40

0

15

13

0

20

12

3

37

0

0

24

8

5

18

8

4

34

0

14

10

10

18

14

2         200kg小焦炉炼焦试验的配合煤质量(%)


方案号

Wt

Ad

Vd

St,d

1

10.2

9.55

23.08

0.55

2

10.0

9.36

20.46

0.50

3

10.4

9.56

22.84

0.52

4

10.2

9.28

21.32

0.54

3         200kg小焦炉炼焦试验的焦炭质量(%)


方案号

M40

M10

CRI

CSR

备注

1

75.5

8.5

42.6

44.0

顶装

80.2

6.8

39.0

53.5

捣固

2

71.3

8.9

42.8

49.6

顶装

74.8

7.6

40.4

52.4

捣固

3

71.2

9.5

43.6

45.2

顶装

74.6

7.3

41.0

48.3

捣固

4

73.4

8.6

39.4

49.5

顶装

75.3

6.9

37.8

52.0

捣固

     由表3可知,在相同配煤比的情况下,捣固炼焦较顶装炼焦的焦炭质量有所改善,焦炭的抗碎强度M40提高1.9%~4.7%,耐磨强度M10改善了1.3%~2.2%,焦炭的反应性CRI降低了1.6%~3.6%,反应后强度CSR提高了2.5%~9.5%。
1.2  半工业性试验
     在2. 8m焦炉上进行了相同配煤比顶装炼焦与捣固炼焦的半工业试验,配煤方案、炼焦试验结果见表4、表5,
4         半工业试验的配煤方案(%)


方案号

煤种1

煤种2

煤种3

煤种4

煤种5

煤种6

煤种7

煤种8

1

25

15

15

10

10

15

5

5

2

25

5

10

5

10

35

5

5

3

25

10

5

0

10

40

5

5

4

25

5

0

5

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