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Preparation method of modified magnesia refractory material
A preparation method of a modified magnesia refractory material belongs to the technical field of refractory materials, and comprises the following steps: crushing and screening magnesite, mixing and grinding, and sieving to filter out grinding blocks to obtain magnesite powder; zirconia powder and manganese oxide powder are mixed, then oil-based mesophase pitch powder is added for coating and mixing, and a composite modifier is prepared; the preparation method comprises the following steps: adding a composite modifier into magnesite powder, carrying out primary modification heat treatment, and cooling to obtain modified isometric system periclase; adding coal-series spinning pitch powder into the modified isometric system periclase, uniformly mixing, performing secondary modification heat treatment, and finally performing post-treatment to obtain the modified magnesia. The composite auxiliary materials are reasonably proportioned, the microstructure of the magnesia is changed in an embedded crystallization manner, and the high-temperature creep property, the erosion resistance and the thermal shock stability of the magnesia are greatly improved.
一种改性镁砂耐火材料的制备方法，所属耐火材料技术领域，方法为将菱镁矿进行粉碎筛分，然后进行混合研磨，过筛滤出磨块后得到菱镁矿粉；将氧化锆粉和氧化锰粉进行混合，然后加入油系中间相沥青粉进行包覆混合，制成复合改性剂；将复合改性剂加入至菱镁矿粉中进行一次改性热处理，冷却后得到改性等轴晶系方镁石；向改性等轴晶系方镁石中加入煤系纺丝沥青粉，进行均匀混合，再进行二次改性热处理，最后经过后处理得到改性镁砂。本发明采用复合辅料的合理配比，通过嵌附结晶方式，改变镁砂微观结构，大幅提高镁砂高温蠕变性、抗侵蚀性能和热震稳定性。
Preparation method of modified magnesia refractory material
A preparation method of a modified magnesia refractory material belongs to the technical field of refractory materials, and comprises the following steps: crushing and screening magnesite, mixing and grinding, and sieving to filter out grinding blocks to obtain magnesite powder; zirconia powder and manganese oxide powder are mixed, then oil-based mesophase pitch powder is added for coating and mixing, and a composite modifier is prepared; the preparation method comprises the following steps: adding a composite modifier into magnesite powder, carrying out primary modification heat treatment, and cooling to obtain modified isometric system periclase; adding coal-series spinning pitch powder into the modified isometric system periclase, uniformly mixing, performing secondary modification heat treatment, and finally performing post-treatment to obtain the modified magnesia. The composite auxiliary materials are reasonably proportioned, the microstructure of the magnesia is changed in an embedded crystallization manner, and the high-temperature creep property, the erosion resistance and the thermal shock stability of the magnesia are greatly improved.
一种改性镁砂耐火材料的制备方法，所属耐火材料技术领域，方法为将菱镁矿进行粉碎筛分，然后进行混合研磨，过筛滤出磨块后得到菱镁矿粉；将氧化锆粉和氧化锰粉进行混合，然后加入油系中间相沥青粉进行包覆混合，制成复合改性剂；将复合改性剂加入至菱镁矿粉中进行一次改性热处理，冷却后得到改性等轴晶系方镁石；向改性等轴晶系方镁石中加入煤系纺丝沥青粉，进行均匀混合，再进行二次改性热处理，最后经过后处理得到改性镁砂。本发明采用复合辅料的合理配比，通过嵌附结晶方式，改变镁砂微观结构，大幅提高镁砂高温蠕变性、抗侵蚀性能和热震稳定性。
Preparation method of modified magnesia refractory material
一种改性镁砂耐火材料的制备方法
SUN WENJING (author) / SHI ZHE (author) / GAO JIAWEI (author)
2023-04-14
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
| European Patent Office | 2015
| European Patent Office | 2015
| European Patent Office | 2016