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Process method for preparing compact calcium hexaluminate refractory clinker by one-step method
The invention relates to a process method for preparing a compact calcium hexaluminate refractory clinker by a one-step method. The compact calcium hexaluminate refractory clinker comprises the following components in percentage by weight: 387.96-89.79% of Al2O3, 8.04-8.21% of CaO and 2.00-4.00% of mixed powder, which is composed of La2O3 and TiO2 according to a weight ratio of 1:1. The relative density is 91.30-94.60%, and the apparent porosity is 2.80-4.50%. The preparation method comprises the following steps: (1) respectively grinding bauxite, limestone and mixed powder, which is composed of La2O3 and TiO2 according to a weight ratio of 1:1, and then mixing; and (2) pressing the mixture into green pellets, and calcining to obtain clinker. According to the invention, mixed powder, which is composed of La2O3 and TiO2 according to a weight ratio of 1:1, is used as a sintering promoter, and is dissolved in a calcium hexaluminate phase to form a solid solution in the calcining process, so that the sintering activity of the calcium hexaluminate phase is improved, the growth of the calcium hexaluminate phase is promoted, therefore, the compact calcium hexaluminate 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六铝酸钙耐火熟料的工艺方法，其成分按重量百分比含Al2O387.96~89.79%，CaO 8.04~8.21%，重量比为1:1的La2O3与TiO2混合微粉2.00~4.00%；相对密度为91.30~94.60%，显气孔率为2.80~4.50%；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混合微粉固溶到六铝酸钙相中形成固溶体，从而提高了六铝酸钙相的烧结活性，促进六铝酸钙相的长大，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六铝酸钙耐火熟料，有效降低了生产能耗，提高了生产效率，促进了节能减排。
Process method for preparing compact calcium hexaluminate refractory clinker by one-step method
The invention relates to a process method for preparing a compact calcium hexaluminate refractory clinker by a one-step method. The compact calcium hexaluminate refractory clinker comprises the following components in percentage by weight: 387.96-89.79% of Al2O3, 8.04-8.21% of CaO and 2.00-4.00% of mixed powder, which is composed of La2O3 and TiO2 according to a weight ratio of 1:1. The relative density is 91.30-94.60%, and the apparent porosity is 2.80-4.50%. The preparation method comprises the following steps: (1) respectively grinding bauxite, limestone and mixed powder, which is composed of La2O3 and TiO2 according to a weight ratio of 1:1, and then mixing; and (2) pressing the mixture into green pellets, and calcining to obtain clinker. According to the invention, mixed powder, which is composed of La2O3 and TiO2 according to a weight ratio of 1:1, is used as a sintering promoter, and is dissolved in a calcium hexaluminate phase to form a solid solution in the calcining process, so that the sintering activity of the calcium hexaluminate phase is improved, the growth of the calcium hexaluminate phase is promoted, therefore, the compact calcium hexaluminate 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六铝酸钙耐火熟料的工艺方法，其成分按重量百分比含Al2O387.96~89.79%，CaO 8.04~8.21%，重量比为1:1的La2O3与TiO2混合微粉2.00~4.00%；相对密度为91.30~94.60%，显气孔率为2.80~4.50%；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混合微粉固溶到六铝酸钙相中形成固溶体，从而提高了六铝酸钙相的烧结活性，促进六铝酸钙相的长大，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六铝酸钙耐火熟料，有效降低了生产能耗，提高了生产效率，促进了节能减排。
Process method for preparing compact calcium hexaluminate refractory clinker by one-step method
一种一步法制备致密六铝酸钙耐火熟料的工艺方法
YIN XUELIANG (author) / HAN TINGQUAN (author) / DING HONGHAI (author) / WANG QUANZHOU (author) / YIN XUEDONG (author) / SI WEI (author) / ZHANG BO (author)
2021-04-27
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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