波海为您浅析轻烧镁球的试验研制 Bohais Experimental Development of Light Burned Magnesium Balls

    将轻烧镁粉、菱镁石颗粒和水按不同配比混合, 液压成型为圆柱试样 , 利用试验分析讨论不同 配比、成型压力对试样理化性能的影响;通过采用不同轻烧镁粉和菱镁石颗粒配比可以调整试样中 M g O 含量和灼减量, 以满足不同钢厂转炉的配镁造渣工艺和护炉需要。

     轻烧镁球主要用于转炉炼钢配镁造渣工艺,采 用轻烧镁球配镁造渣,可向炉渣提供足够的活性 MgO ,抑制炉衬中 MgO 向炉渣溶解扩散, 减轻炉 衬侵蚀程度,起到保护炉衬 ,提高炉龄的作用。

The lightly burned magnesium powder, magnesite particles and water were mixed in different proportions and hydroformed into cylindrical samples. The effects of different ratios and molding pressure on the physical and chemical properties of the samples were discussed and analyzed by experiments. Mixing with magnesite particles can adjust the M g O content and ignition loss in the sample to meet the magnesium slag mixing process and furnace protection needs of converters in different steel plants.

      Light-burned magnesium balls are mainly used in converter steelmaking and magnesium slag-making processes.Using light-burned magnesium balls with magnesium slag-making can provide sufficient active MgO to the slag, inhibit the MgO in the furnace lining from dissolving and diffusing to the slag, and reduce the degree of corrosion To protect the furnace lining and increase the age of the furnace.

     最近几年国家对于轻烧镁球的试验研究正在逐渐加深，现在主要采取以下步骤对轻烧镁球进行试验和研究。

1  试 验

  1 .1 试验原料

  1 .2 试样制备及检测

2 　结果与讨论

  2 .1 轻烧镁粉加入量对试样表观体积密度的影响

  2 .2 加水量对试样表观体积密度的影响

  2 .3 成型压力对试样表观体积密度的影响

  2 .5 加水量对试样耐压强度的影响

  2 .6 成型压力对试样耐压强度的影响

  2 .7 试样含水率(水量/干料量)的变化

  2 .8 试样理化性能检测

3  结 语

  1)在轻烧镁粉中加入部分菱镁石颗粒有助于 提高试样的表观体积密度和强度。

  2)加水量/轻烧镁粉量为 15 %～ 20 %时 ,试 样的表观体积密度和强度较大。

  3)试样的表观体积密度随成型压力的增加而 变大。

  4)成型试样在空气中自然放置 2 天后 ,其表 观体积密度接近试样烘干的表观体积密度 ;游离 水分小于 1 %, 化合水分 5 %～ 6 %。

In recent years, the country's experimental research on lightly burned magnesium balls is gradually deepening. Now, the following steps are mainly taken to test and study lightly burned magnesium balls.

1 Trial

  1.1 Test materials

  1.2 Preparation and testing of samples

2 Results and discussion

  2.1 Effect of the amount of light-burned magnesium powder on the apparent bulk density of the sample

  2.2 Influence of the amount of water added on the apparent bulk density of the sample

  2.3 Influence of molding pressure on the apparent bulk density of the sample

  2.5 Influence of the amount of water added on the compressive strength of the sample

  2 .6 Influence of molding pressure on the compressive strength of the sample

  2.7 Changes in moisture content (water content / dry material content) of the sample

  2.8 Test of physical and chemical properties of samples

3 conclusions

  1) Adding part of the magnesite particles to the light-burned magnesium powder can help to increase the apparent bulk density and strength of the sample.

  2) The apparent bulk density and strength of the test sample are larger when the amount of water / light-burned magnesium powder is 15% to 20%.

  3) The apparent bulk density of the sample becomes larger as the molding pressure increases.

  4) After the sample is left in the air for 2 days, its apparent bulk density is close to the apparent bulk density of the sample after drying; the free moisture is less than 1%, and the combined moisture is 5% to 6%.