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Method for preparing converter thermal-state repairing material by using used dead burned magnesia bricks
The invention relates to a method for preparing a converter thermal-state repairing material by using used dead-burned magnesia bricks, which specifically comprises the following steps: (1) grinding the used dead-burned magnesia bricks by using a vibration mill for 15-20 seconds, screening out 1-3mm and 0-1mm particles, and carrying out ball milling on the remaining used dead-burned magnesia bricks by using a ball mill until the particle size is less than 200 meshes; (2) uniformly mixing the used dead-burnt magnesite brick particles treated in the step (1), adding 8-30wt% of modified asphalt powder, uniformly mixing, adding magnesia with the particle size of less than 200 meshes and metal silicon powder into the uniformly mixed particles according to the proportions of 0-30wt% and 10wt% respectively, and stirring for 3-5min by using a stirrer to obtain a thermal-state repairing material based on the used dead burned magnesia bricks; and (3) pressing the thermal-state repairing materialinto a cylindrical sample under the pressure condition of 20MPa, and sintering the sample in a muffle furnace at 1200 DEG C for 3 hours to obtain the converter thermal-state repairing material samplefor performance tests. The material has the advantages of low density, high compressive strength, high porosity, low cost and the like.
本发明系一种利用用后重烧镁砖制备转炉热态修补料的方法，具体包括如下几个步骤：(1)将用后重烧镁砖用振动磨粉磨15～20s，之后筛分出1～3mm和0～1mm的颗粒，剩余用后重烧镁砖经球磨机球磨至粒径小于200目。(2)将步骤(1)处理后的用后重烧镁砖颗粒混合均匀，加入8～30wt％的改性沥青粉并混合均匀，将粒径小于200目的镁砂和金属硅粉加入到混料均匀后颗粒中，其中镁砂和金属硅粉的比例分别为0～30wt％和10wt％，利用搅拌机搅拌3～5min，制备出基于用后重烧镁砖的热态修补料。(3)将热态修补料在20MPa的压力条件下压制成圆柱形样品，再将样品放置马弗炉中于1200℃烧结3h，得到用于性能测试的转炉热态修补料样品。该材料具有密度低、耐压强度高、气孔率大和成本低等优点。
Method for preparing converter thermal-state repairing material by using used dead burned magnesia bricks
The invention relates to a method for preparing a converter thermal-state repairing material by using used dead-burned magnesia bricks, which specifically comprises the following steps: (1) grinding the used dead-burned magnesia bricks by using a vibration mill for 15-20 seconds, screening out 1-3mm and 0-1mm particles, and carrying out ball milling on the remaining used dead-burned magnesia bricks by using a ball mill until the particle size is less than 200 meshes; (2) uniformly mixing the used dead-burnt magnesite brick particles treated in the step (1), adding 8-30wt% of modified asphalt powder, uniformly mixing, adding magnesia with the particle size of less than 200 meshes and metal silicon powder into the uniformly mixed particles according to the proportions of 0-30wt% and 10wt% respectively, and stirring for 3-5min by using a stirrer to obtain a thermal-state repairing material based on the used dead burned magnesia bricks; and (3) pressing the thermal-state repairing materialinto a cylindrical sample under the pressure condition of 20MPa, and sintering the sample in a muffle furnace at 1200 DEG C for 3 hours to obtain the converter thermal-state repairing material samplefor performance tests. The material has the advantages of low density, high compressive strength, high porosity, low cost and the like.
本发明系一种利用用后重烧镁砖制备转炉热态修补料的方法，具体包括如下几个步骤：(1)将用后重烧镁砖用振动磨粉磨15～20s，之后筛分出1～3mm和0～1mm的颗粒，剩余用后重烧镁砖经球磨机球磨至粒径小于200目。(2)将步骤(1)处理后的用后重烧镁砖颗粒混合均匀，加入8～30wt％的改性沥青粉并混合均匀，将粒径小于200目的镁砂和金属硅粉加入到混料均匀后颗粒中，其中镁砂和金属硅粉的比例分别为0～30wt％和10wt％，利用搅拌机搅拌3～5min，制备出基于用后重烧镁砖的热态修补料。(3)将热态修补料在20MPa的压力条件下压制成圆柱形样品，再将样品放置马弗炉中于1200℃烧结3h，得到用于性能测试的转炉热态修补料样品。该材料具有密度低、耐压强度高、气孔率大和成本低等优点。
Method for preparing converter thermal-state repairing material by using used dead burned magnesia bricks
一种利用用后重烧镁砖制备转炉热态修补料的方法
WU XIAOWEN (author) / CHI PENG (author) / ZHANG YUENA (author) / SHEN CAN (author) / LIU YANGAI (author) / HUANG ZHAOHUI (author) / FANG MINGHAO (author) / MIN XIN (author)
2021-03-26
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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