铸锭轻质绝热板的使用

1 前言钢锭头部内衬绝热板,替代内衬粘土砖绝热帽,提高了金属收得率、加速锭模周转和改善劳动条件。“三位一体”(目前一些钢厂进一步发展为“二位一体”)的浇铸工艺已在我国冶金系统普遍推广。

热处理对轻质绝热耐火材料性能的影响

研究了煅烧温度对以轻质骨料、珍珠岩、叶蜡石和焦宝石为主要原料,铝酸钙水泥和硅微粉为粘结剂的轻质绝热耐火材料性能的影响。试样自然干燥24 h脱模后,再经110℃烘干24 h,分别于500℃、800℃、1000℃和1300℃煅烧3 h,然后检测试样的体积密度(BD)、线变化率(PLC)、常温抗折强度(MOR)、常温耐压强度(CCS)及热膨胀系数和抗热震性能。结果表明,随着热处理温度的提高,该轻质绝热耐火材料的体积密度减小,常温抗折强度和常温耐压强度则先减小后增大,热膨胀系数减小。该轻质绝热耐火材料具有优良的抗热震性能。

30型轻质绝热板研制与应用

通过用高熔点农安硅砂骨料，压缩浮珠用量，取消珍珠岩，调整绝热板容重，确定了３０型轻质绝热板最佳配方。经２３炉浇钢帽口典型试验结果表明，绝热板保温效果良好，满足大生产要求。

高强度轻质绝热板的应用与实践分析

柳钢转炉厂因运营安全要求,没有在150 t铁水包包壳内砌筑隔热层,导致包壳温度较高,热量损失较多。虽然150 t钢包包壳内砌筑有保温效果较好的纳米绝热板,但受该材料性能的局限,该绝热板降低了钢包永久层的使用寿命和使用安全性。因此,技术人员总结高强度轻质绝热板在150 t铁水包、150 t钢包的试验应用效果。试验结果表明:高强度轻质绝热板能降低150 t铁水包包壳的温度约45℃,能提高150 t钢包永久层约16%的使用寿命和使用安全性。同时,此应用每年可节约成本约22万元左右。

轻质绝热板的研制与试用

本文论述了绝热板的研制与试用过程,由普通绝热板而发展到轻质绝热板,使钢锭成坯率提高1％。

免蒸法制备轻质硬硅钙石型转接板材料

以动态水热法合成的硬硅钙石为原料,加入玻璃纤维、粘结剂,经压制成型制备铸铝用硬硅钙石型转接板材料。探究了成型压力、玻璃纤维含量、粘结剂的种类与含量对样品性能的影响。利用阿基米德法测定材料密度,万能试验机测量弯曲强度,稳态法测定导热系数,抗热震性试验机测试抗热震性能。结果表明,在成型压力为20 MPa、玻璃纤维含量为5%、水玻璃含量为5%的条件下可制备密度为0.88 g/cm3、弯曲强度为7.68 MPa、收缩率为0.72%、导热系数为0.205 W/(m·K),抗热震性能优良的样品。

Impact of light-weight external thermal insulation materials on building surrounding thermal environment in summer

The method for calculating wall surface heat storage coefficient was introduced,and the coefficients of several common walls with light-weight external thermal insulation materials and the traditional solid clay brick wall were calculated.In order to study the impact of light-weight external thermal insulation materials,a contrasting experiment was carried out between an external insulated room and an uninsulated room in August,2010,in Chongqing,China.The result shows that outside surface heat storage coefficient of the insulated wall is much less than that of the traditional wall.However,during sunny time,the surface temperature of external walls of the insulated room is obviously higher than that of the uninsulated room.In different orientations,due to different amounts of solar radiation and being irradiated in different time,the contrasting temperature difference(CTD) appears different regularity.In a word,using light-weight external thermal insulation materials has a negative impact on building surrounding thermal environment and people's health.Finally,some suggestions on how to eliminate the impact,such as improving the surface condition of the building envelop,and plating vertical greening,are put forward.