Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Technological method for preparing compact calcium dialuminate refractory clinker by one-step method
The invention relates to a technological method for preparing a compact calcium dialuminate refractory clinker by a one-step method. The compact calcium dialuminate refractory clinker comprises the following components in percentage by weight: 76.11-77.68% of Al2O3, 20.89-21.32% of CaO and 1-3% of mixed micro powder of La2O3 and TiO2 in a weight ratio of 1:1. The relative density is 91.6 to 93.9 percent, and the apparent porosity is 3.7 to 4.9 percent. The preparation method comprises the following steps: (1) respectively grinding bauxite, limestone and mixed micro powder of La2O3 and TiO2 in a weight ratio of 1:1, and conducting mixing; and (2) pressing the mixed material into green pellets, and then conducting calcining to prepare clinker. The mixed micro powder of La2O3 and TiO2 in a weight ratio of 1:1 is used as a sintering promoter, and the mixed micro powder of La2O3 and TiO2 in a weight ratio of 1:1 is dissolved in a calcium dialuminate phase to form a solid solution in a calcining process, so that the sintering activity of the calcium dialuminate phase is improved, and the growth of the calcium dialuminate phase is promoted. Therefore, the compact calcium dialuminate refractory clinker can be obtained under the conditions of lower calcination temperature and shorter heat preservation time, the production energy consumption is effectively reduced, the production efficiency is improved, and energy conservation and emission reduction are promoted.
一种一步法制备致密二铝酸钙耐火熟料的工艺方法，其成分按重量百分比含Al2O376.11～77.68％，CaO 20.89～21.32％，重量比为1:1的La2O3与TiO2混合微粉1～3％；相对密度为91.6～93.9％，显气孔率为3.7～4.9％；制备方法为：(1)将铝矾土、石灰石和重量比为1:1的La2O3与TiO2混合微粉分别磨细后混合；(2)将混合物料压制成生球，然后进行煅烧制成熟料。本发明采用重量比为1:1的La2O3与TiO2混合微粉作为促烧结剂，在煅烧过程重量比为1:1的La2O3与TiO2混合微粉固溶到二铝酸钙相中形成固溶体，从而提高了二铝酸钙相的烧结活性，促进二铝酸钙相的长大，从而可在较低的煅烧温度和较短的保温时间条件下获得致密二铝酸钙耐火熟料，有效降低了生产能耗，提高了生产效率，促进了节能减排。
Technological method for preparing compact calcium dialuminate refractory clinker by one-step method
The invention relates to a technological method for preparing a compact calcium dialuminate refractory clinker by a one-step method. The compact calcium dialuminate refractory clinker comprises the following components in percentage by weight: 76.11-77.68% of Al2O3, 20.89-21.32% of CaO and 1-3% of mixed micro powder of La2O3 and TiO2 in a weight ratio of 1:1. The relative density is 91.6 to 93.9 percent, and the apparent porosity is 3.7 to 4.9 percent. The preparation method comprises the following steps: (1) respectively grinding bauxite, limestone and mixed micro powder of La2O3 and TiO2 in a weight ratio of 1:1, and conducting mixing; and (2) pressing the mixed material into green pellets, and then conducting calcining to prepare clinker. The mixed micro powder of La2O3 and TiO2 in a weight ratio of 1:1 is used as a sintering promoter, and the mixed micro powder of La2O3 and TiO2 in a weight ratio of 1:1 is dissolved in a calcium dialuminate phase to form a solid solution in a calcining process, so that the sintering activity of the calcium dialuminate phase is improved, and the growth of the calcium dialuminate phase is promoted. Therefore, the compact calcium dialuminate refractory clinker can be obtained under the conditions of lower calcination temperature and shorter heat preservation time, the production energy consumption is effectively reduced, the production efficiency is improved, and energy conservation and emission reduction are promoted.
一种一步法制备致密二铝酸钙耐火熟料的工艺方法，其成分按重量百分比含Al2O376.11～77.68％，CaO 20.89～21.32％，重量比为1:1的La2O3与TiO2混合微粉1～3％；相对密度为91.6～93.9％，显气孔率为3.7～4.9％；制备方法为：(1)将铝矾土、石灰石和重量比为1:1的La2O3与TiO2混合微粉分别磨细后混合；(2)将混合物料压制成生球，然后进行煅烧制成熟料。本发明采用重量比为1:1的La2O3与TiO2混合微粉作为促烧结剂，在煅烧过程重量比为1:1的La2O3与TiO2混合微粉固溶到二铝酸钙相中形成固溶体，从而提高了二铝酸钙相的烧结活性，促进二铝酸钙相的长大，从而可在较低的煅烧温度和较短的保温时间条件下获得致密二铝酸钙耐火熟料，有效降低了生产能耗，提高了生产效率，促进了节能减排。
Technological method for preparing compact calcium dialuminate refractory clinker by one-step method
一种一步法制备致密二铝酸钙耐火熟料的工艺方法
YIN XUELIANG (Autor:in) / WANG QUANZHOU (Autor:in) / HAN TINGQUAN (Autor:in) / DING HONGHAI (Autor:in) / YIN XUEDONG (Autor:in) / ZHANG BO (Autor:in)
23.07.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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