Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of solid solution modified sintered magnesia based on microcrystalline magnesite
The invention relates to a preparation method of solid solution modified sintered magnesia based on microcrystalline magnesite, which comprises the following steps: (1) taking microcrystalline magnesite as an initial mineral raw material, and crushing and grinding the microcrystalline magnesite to obtain microcrystalline magnesite powder; (2) calcining the microcrystalline magnesite powder to obtain light calcined magnesia powder; (3) uniformly mixing the light calcined magnesia powder with a certain amount of additive powder to obtain mixed powder; (4) the mixed powder is subjected to ball pressing forming through a high-pressure ball pressing machine, and a pressed ball blank is obtained; (5) calcining the pressed ball blank at 1700-1900 DEG C to obtain blocky solid solution modified sintered magnesia; and (6) crushing and grading the blocky solid solution modified magnesite clinker to obtain solid solution modified magnesite clinker with different particle fractions. According to the invention, the transition metal oxide and the magnesium oxide are introduced to carry out solid solution reaction at high temperature, so that the mechanical property and the erosion resistance of the sintered magnesia are improved; the microstructure of the sintered magnesia is optimized, the average grain size is improved, and the heat conductivity is obviously reduced.
本发明涉及一种基于微晶菱镁矿的固溶改性烧结镁砂的制备方法，包括如下步骤：（1）以微晶菱镁矿石为起始矿物原料，将其经过破碎、研磨得到微晶菱镁矿粉体；（2）将微晶菱镁矿粉体煅烧得到轻烧氧化镁粉体；（3）将轻烧氧化镁粉体与一定量的添加剂粉体，均匀混合得到混合粉体；（4）将混合粉体通过高压压球机进行压球成型得到压制球坯；（5）将压制球坯在1700~1900℃下煅烧得到块状固溶改性烧结镁砂；（6）将块状固溶改性烧结镁砂经过破碎、分级得到不同粒级的固溶改性烧结镁砂。本发明通过引入过渡金属氧化物与氧化镁在高温下发生固溶反应，提高了烧结镁砂的力学性能和抗侵蚀性能；并优化烧结镁砂显微结构，提高其平均晶粒尺寸并显著降低热导率。
Preparation method of solid solution modified sintered magnesia based on microcrystalline magnesite
The invention relates to a preparation method of solid solution modified sintered magnesia based on microcrystalline magnesite, which comprises the following steps: (1) taking microcrystalline magnesite as an initial mineral raw material, and crushing and grinding the microcrystalline magnesite to obtain microcrystalline magnesite powder; (2) calcining the microcrystalline magnesite powder to obtain light calcined magnesia powder; (3) uniformly mixing the light calcined magnesia powder with a certain amount of additive powder to obtain mixed powder; (4) the mixed powder is subjected to ball pressing forming through a high-pressure ball pressing machine, and a pressed ball blank is obtained; (5) calcining the pressed ball blank at 1700-1900 DEG C to obtain blocky solid solution modified sintered magnesia; and (6) crushing and grading the blocky solid solution modified magnesite clinker to obtain solid solution modified magnesite clinker with different particle fractions. According to the invention, the transition metal oxide and the magnesium oxide are introduced to carry out solid solution reaction at high temperature, so that the mechanical property and the erosion resistance of the sintered magnesia are improved; the microstructure of the sintered magnesia is optimized, the average grain size is improved, and the heat conductivity is obviously reduced.
本发明涉及一种基于微晶菱镁矿的固溶改性烧结镁砂的制备方法，包括如下步骤：（1）以微晶菱镁矿石为起始矿物原料，将其经过破碎、研磨得到微晶菱镁矿粉体；（2）将微晶菱镁矿粉体煅烧得到轻烧氧化镁粉体；（3）将轻烧氧化镁粉体与一定量的添加剂粉体，均匀混合得到混合粉体；（4）将混合粉体通过高压压球机进行压球成型得到压制球坯；（5）将压制球坯在1700~1900℃下煅烧得到块状固溶改性烧结镁砂；（6）将块状固溶改性烧结镁砂经过破碎、分级得到不同粒级的固溶改性烧结镁砂。本发明通过引入过渡金属氧化物与氧化镁在高温下发生固溶反应，提高了烧结镁砂的力学性能和抗侵蚀性能；并优化烧结镁砂显微结构，提高其平均晶粒尺寸并显著降低热导率。
Preparation method of solid solution modified sintered magnesia based on microcrystalline magnesite
一种基于微晶菱镁矿的固溶改性烧结镁砂的制备方法
MA CHENGLIANG (Autor:in) / LI SI (Autor:in) / CHEN LIUGANG (Autor:in) / LI XIANG (Autor:in) / YIN ZIYANG (Autor:in) / SHI WUYANG (Autor:in) / WANG ANXIU (Autor:in) / LIU BAIKUAN (Autor:in) / FENG RUNTANG (Autor:in) / LIU CHENG (Autor:in)
08.03.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
Method for producing high-volume-density high-purity sintered magnesia from low-grade magnesite
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